diff options
Diffstat (limited to 'Crypto/src/cms')
66 files changed, 9068 insertions, 0 deletions
diff --git a/Crypto/src/cms/BaseDigestCalculator.cs b/Crypto/src/cms/BaseDigestCalculator.cs new file mode 100644 index 000000000..3dcbca753 --- /dev/null +++ b/Crypto/src/cms/BaseDigestCalculator.cs @@ -0,0 +1,23 @@ +using System; + +using Org.BouncyCastle.Utilities; + +namespace Org.BouncyCastle.Cms +{ + internal class BaseDigestCalculator + : IDigestCalculator + { + private readonly byte[] digest; + + internal BaseDigestCalculator( + byte[] digest) + { + this.digest = digest; + } + + public byte[] GetDigest() + { + return Arrays.Clone(digest); + } + } +} diff --git a/Crypto/src/cms/CMSAttributeTableGenerationException.cs b/Crypto/src/cms/CMSAttributeTableGenerationException.cs new file mode 100644 index 000000000..2bc8ce5d1 --- /dev/null +++ b/Crypto/src/cms/CMSAttributeTableGenerationException.cs @@ -0,0 +1,25 @@ +using System; + +namespace Org.BouncyCastle.Cms +{ + public class CmsAttributeTableGenerationException + : CmsException + { + public CmsAttributeTableGenerationException() + { + } + + public CmsAttributeTableGenerationException( + string name) + : base(name) + { + } + + public CmsAttributeTableGenerationException( + string name, + Exception e) + : base(name, e) + { + } + } +} diff --git a/Crypto/src/cms/CMSAttributeTableGenerator.cs b/Crypto/src/cms/CMSAttributeTableGenerator.cs new file mode 100644 index 000000000..92c9a29d9 --- /dev/null +++ b/Crypto/src/cms/CMSAttributeTableGenerator.cs @@ -0,0 +1,25 @@ +using System; +using System.Collections; + +using Org.BouncyCastle.Asn1.Cms; + +namespace Org.BouncyCastle.Cms +{ + /// <remarks> + /// The 'Signature' parameter is only available when generating unsigned attributes. + /// </remarks> + public enum CmsAttributeTableParameter + { +// const string ContentType = "contentType"; +// const string Digest = "digest"; +// const string Signature = "encryptedDigest"; +// const string DigestAlgorithmIdentifier = "digestAlgID"; + + ContentType, Digest, Signature, DigestAlgorithmIdentifier + } + + public interface CmsAttributeTableGenerator + { + AttributeTable GetAttributes(IDictionary parameters); + } +} diff --git a/Crypto/src/cms/CMSAuthEnvelopedData.cs b/Crypto/src/cms/CMSAuthEnvelopedData.cs new file mode 100644 index 000000000..d35e946ae --- /dev/null +++ b/Crypto/src/cms/CMSAuthEnvelopedData.cs @@ -0,0 +1,112 @@ +using System; +using System.Collections; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto.Parameters; + +namespace Org.BouncyCastle.Cms +{ + /** + * containing class for an CMS AuthEnveloped Data object + */ + internal class CmsAuthEnvelopedData + { + internal RecipientInformationStore recipientInfoStore; + internal ContentInfo contentInfo; + + private OriginatorInfo originator; + private AlgorithmIdentifier authEncAlg; + private Asn1Set authAttrs; + private byte[] mac; + private Asn1Set unauthAttrs; + + public CmsAuthEnvelopedData( + byte[] authEnvData) + : this(CmsUtilities.ReadContentInfo(authEnvData)) + { + } + + public CmsAuthEnvelopedData( + Stream authEnvData) + : this(CmsUtilities.ReadContentInfo(authEnvData)) + { + } + + public CmsAuthEnvelopedData( + ContentInfo contentInfo) + { + this.contentInfo = contentInfo; + + AuthEnvelopedData authEnvData = AuthEnvelopedData.GetInstance(contentInfo.Content); + + this.originator = authEnvData.OriginatorInfo; + + // + // read the recipients + // + Asn1Set recipientInfos = authEnvData.RecipientInfos; + + // + // read the auth-encrypted content info + // + EncryptedContentInfo authEncInfo = authEnvData.AuthEncryptedContentInfo; + this.authEncAlg = authEncInfo.ContentEncryptionAlgorithm; + CmsSecureReadable secureReadable = new AuthEnvelopedSecureReadable(this); + + // + // build the RecipientInformationStore + // + this.recipientInfoStore = CmsEnvelopedHelper.BuildRecipientInformationStore( + recipientInfos, secureReadable); + + // FIXME These need to be passed to the AEAD cipher as AAD (Additional Authenticated Data) + this.authAttrs = authEnvData.AuthAttrs; + this.mac = authEnvData.Mac.GetOctets(); + this.unauthAttrs = authEnvData.UnauthAttrs; + } + + private class AuthEnvelopedSecureReadable : CmsSecureReadable + { + private readonly CmsAuthEnvelopedData parent; + + internal AuthEnvelopedSecureReadable(CmsAuthEnvelopedData parent) + { + this.parent = parent; + } + + public AlgorithmIdentifier Algorithm + { + get { return parent.authEncAlg; } + } + + public object CryptoObject + { + get { return null; } + } + + public CmsReadable GetReadable(KeyParameter key) + { + // TODO Create AEAD cipher instance to decrypt and calculate tag ( MAC) + throw new CmsException("AuthEnveloped data decryption not yet implemented"); + +// RFC 5084 ASN.1 Module +// -- Parameters for AlgorithmIdentifier +// +// CCMParameters ::= SEQUENCE { +// aes-nonce OCTET STRING (SIZE(7..13)), +// aes-ICVlen AES-CCM-ICVlen DEFAULT 12 } +// +// AES-CCM-ICVlen ::= INTEGER (4 | 6 | 8 | 10 | 12 | 14 | 16) +// +// GCMParameters ::= SEQUENCE { +// aes-nonce OCTET STRING, -- recommended size is 12 octets +// aes-ICVlen AES-GCM-ICVlen DEFAULT 12 } +// +// AES-GCM-ICVlen ::= INTEGER (12 | 13 | 14 | 15 | 16) + } + } + } +} diff --git a/Crypto/src/cms/CMSAuthEnvelopedGenerator.cs b/Crypto/src/cms/CMSAuthEnvelopedGenerator.cs new file mode 100644 index 000000000..4273cff29 --- /dev/null +++ b/Crypto/src/cms/CMSAuthEnvelopedGenerator.cs @@ -0,0 +1,16 @@ +using System; + +using Org.BouncyCastle.Asn1.Nist; + +namespace Org.BouncyCastle.Cms +{ + internal class CmsAuthEnvelopedGenerator + { + public static readonly string Aes128Ccm = NistObjectIdentifiers.IdAes128Ccm.Id; + public static readonly string Aes192Ccm = NistObjectIdentifiers.IdAes192Ccm.Id; + public static readonly string Aes256Ccm = NistObjectIdentifiers.IdAes256Ccm.Id; + public static readonly string Aes128Gcm = NistObjectIdentifiers.IdAes128Gcm.Id; + public static readonly string Aes192Gcm = NistObjectIdentifiers.IdAes192Gcm.Id; + public static readonly string Aes256Gcm = NistObjectIdentifiers.IdAes256Gcm.Id; + } +} diff --git a/Crypto/src/cms/CMSAuthenticatedData.cs b/Crypto/src/cms/CMSAuthenticatedData.cs new file mode 100644 index 000000000..5e234da2b --- /dev/null +++ b/Crypto/src/cms/CMSAuthenticatedData.cs @@ -0,0 +1,137 @@ +using System; +using System.Collections; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Utilities; + +namespace Org.BouncyCastle.Cms +{ + /** + * containing class for an CMS Authenticated Data object + */ + public class CmsAuthenticatedData + { + internal RecipientInformationStore recipientInfoStore; + internal ContentInfo contentInfo; + + private AlgorithmIdentifier macAlg; + private Asn1Set authAttrs; + private Asn1Set unauthAttrs; + private byte[] mac; + + public CmsAuthenticatedData( + byte[] authData) + : this(CmsUtilities.ReadContentInfo(authData)) + { + } + + public CmsAuthenticatedData( + Stream authData) + : this(CmsUtilities.ReadContentInfo(authData)) + { + } + + public CmsAuthenticatedData( + ContentInfo contentInfo) + { + this.contentInfo = contentInfo; + + AuthenticatedData authData = AuthenticatedData.GetInstance(contentInfo.Content); + + // + // read the recipients + // + Asn1Set recipientInfos = authData.RecipientInfos; + + this.macAlg = authData.MacAlgorithm; + + // + // read the authenticated content info + // + ContentInfo encInfo = authData.EncapsulatedContentInfo; + CmsReadable readable = new CmsProcessableByteArray( + Asn1OctetString.GetInstance(encInfo.Content).GetOctets()); + CmsSecureReadable secureReadable = new CmsEnvelopedHelper.CmsAuthenticatedSecureReadable( + this.macAlg, readable); + + // + // build the RecipientInformationStore + // + this.recipientInfoStore = CmsEnvelopedHelper.BuildRecipientInformationStore( + recipientInfos, secureReadable); + + this.authAttrs = authData.AuthAttrs; + this.mac = authData.Mac.GetOctets(); + this.unauthAttrs = authData.UnauthAttrs; + } + + public byte[] GetMac() + { + return Arrays.Clone(mac); + } + + public AlgorithmIdentifier MacAlgorithmID + { + get { return macAlg; } + } + + /** + * return the object identifier for the content MAC algorithm. + */ + public string MacAlgOid + { + get { return macAlg.ObjectID.Id; } + } + + /** + * return a store of the intended recipients for this message + */ + public RecipientInformationStore GetRecipientInfos() + { + return recipientInfoStore; + } + + /** + * return the ContentInfo + */ + public ContentInfo ContentInfo + { + get { return contentInfo; } + } + + /** + * return a table of the digested attributes indexed by + * the OID of the attribute. + */ + public Asn1.Cms.AttributeTable GetAuthAttrs() + { + if (authAttrs == null) + return null; + + return new Asn1.Cms.AttributeTable(authAttrs); + } + + /** + * return a table of the undigested attributes indexed by + * the OID of the attribute. + */ + public Asn1.Cms.AttributeTable GetUnauthAttrs() + { + if (unauthAttrs == null) + return null; + + return new Asn1.Cms.AttributeTable(unauthAttrs); + } + + /** + * return the ASN.1 encoded representation of this object. + */ + public byte[] GetEncoded() + { + return contentInfo.GetEncoded(); + } + } +} diff --git a/Crypto/src/cms/CMSAuthenticatedDataGenerator.cs b/Crypto/src/cms/CMSAuthenticatedDataGenerator.cs new file mode 100644 index 000000000..0a37ca4f5 --- /dev/null +++ b/Crypto/src/cms/CMSAuthenticatedDataGenerator.cs @@ -0,0 +1,156 @@ +using System; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.Generators; +using Org.BouncyCastle.Crypto.IO; +using Org.BouncyCastle.Crypto.Parameters; +using Org.BouncyCastle.Security; +using Org.BouncyCastle.Utilities.IO; + +namespace Org.BouncyCastle.Cms +{ + /** + * General class for generating a CMS authenticated-data message. + * + * A simple example of usage. + * + * <pre> + * CMSAuthenticatedDataGenerator fact = new CMSAuthenticatedDataGenerator(); + * + * fact.addKeyTransRecipient(cert); + * + * CMSAuthenticatedData data = fact.generate(content, algorithm, "BC"); + * </pre> + */ + public class CmsAuthenticatedDataGenerator + : CmsAuthenticatedGenerator + { + /** + * base constructor + */ + public CmsAuthenticatedDataGenerator() + { + } + + /** + * constructor allowing specific source of randomness + * @param rand instance of SecureRandom to use + */ + public CmsAuthenticatedDataGenerator( + SecureRandom rand) + : base(rand) + { + } + + /** + * generate an enveloped object that contains an CMS Enveloped Data + * object using the given provider and the passed in key generator. + */ + private CmsAuthenticatedData Generate( + CmsProcessable content, + string macOid, + CipherKeyGenerator keyGen) + { + AlgorithmIdentifier macAlgId; + KeyParameter encKey; + Asn1OctetString encContent; + Asn1OctetString macResult; + + try + { + // FIXME Will this work for macs? + byte[] encKeyBytes = keyGen.GenerateKey(); + encKey = ParameterUtilities.CreateKeyParameter(macOid, encKeyBytes); + + Asn1Encodable asn1Params = GenerateAsn1Parameters(macOid, encKeyBytes); + + ICipherParameters cipherParameters; + macAlgId = GetAlgorithmIdentifier( + macOid, encKey, asn1Params, out cipherParameters); + + IMac mac = MacUtilities.GetMac(macOid); + // TODO Confirm no ParametersWithRandom needed + // FIXME Only passing key at the moment +// mac.Init(cipherParameters); + mac.Init(encKey); + + MemoryStream bOut = new MemoryStream(); + Stream mOut = new TeeOutputStream(bOut, new MacOutputStream(mac)); + + content.Write(mOut); + + mOut.Dispose(); + bOut.Dispose(); + + encContent = new BerOctetString(bOut.ToArray()); + + byte[] macOctets = MacUtilities.DoFinal(mac); + macResult = new DerOctetString(macOctets); + } + catch (SecurityUtilityException e) + { + throw new CmsException("couldn't create cipher.", e); + } + catch (InvalidKeyException e) + { + throw new CmsException("key invalid in message.", e); + } + catch (IOException e) + { + throw new CmsException("exception decoding algorithm parameters.", e); + } + + Asn1EncodableVector recipientInfos = new Asn1EncodableVector(); + + foreach (RecipientInfoGenerator rig in recipientInfoGenerators) + { + try + { + recipientInfos.Add(rig.Generate(encKey, rand)); + } + catch (InvalidKeyException e) + { + throw new CmsException("key inappropriate for algorithm.", e); + } + catch (GeneralSecurityException e) + { + throw new CmsException("error making encrypted content.", e); + } + } + + ContentInfo eci = new ContentInfo(CmsObjectIdentifiers.Data, encContent); + + ContentInfo contentInfo = new ContentInfo( + CmsObjectIdentifiers.AuthenticatedData, + new AuthenticatedData(null, new DerSet(recipientInfos), macAlgId, null, eci, null, macResult, null)); + + return new CmsAuthenticatedData(contentInfo); + } + + /** + * generate an authenticated object that contains an CMS Authenticated Data object + */ + public CmsAuthenticatedData Generate( + CmsProcessable content, + string encryptionOid) + { + try + { + // FIXME Will this work for macs? + CipherKeyGenerator keyGen = GeneratorUtilities.GetKeyGenerator(encryptionOid); + + keyGen.Init(new KeyGenerationParameters(rand, keyGen.DefaultStrength)); + + return Generate(content, encryptionOid, keyGen); + } + catch (SecurityUtilityException e) + { + throw new CmsException("can't find key generation algorithm.", e); + } + } + } +} diff --git a/Crypto/src/cms/CMSAuthenticatedDataParser.cs b/Crypto/src/cms/CMSAuthenticatedDataParser.cs new file mode 100644 index 000000000..c99aac61c --- /dev/null +++ b/Crypto/src/cms/CMSAuthenticatedDataParser.cs @@ -0,0 +1,214 @@ +using System; +using System.Collections; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Utilities; + +namespace Org.BouncyCastle.Cms +{ + /** + * Parsing class for an CMS Authenticated Data object from an input stream. + * <p> + * Note: that because we are in a streaming mode only one recipient can be tried and it is important + * that the methods on the parser are called in the appropriate order. + * </p> + * <p> + * Example of use - assuming the first recipient matches the private key we have. + * <pre> + * CMSAuthenticatedDataParser ad = new CMSAuthenticatedDataParser(inputStream); + * + * RecipientInformationStore recipients = ad.getRecipientInfos(); + * + * Collection c = recipients.getRecipients(); + * Iterator it = c.iterator(); + * + * if (it.hasNext()) + * { + * RecipientInformation recipient = (RecipientInformation)it.next(); + * + * CMSTypedStream recData = recipient.getContentStream(privateKey, "BC"); + * + * processDataStream(recData.getContentStream()); + * + * if (!Arrays.equals(ad.getMac(), recipient.getMac()) + * { + * System.err.println("Data corrupted!!!!"); + * } + * } + * </pre> + * Note: this class does not introduce buffering - if you are processing large files you should create + * the parser with: + * <pre> + * CMSAuthenticatedDataParser ep = new CMSAuthenticatedDataParser(new BufferedInputStream(inputStream, bufSize)); + * </pre> + * where bufSize is a suitably large buffer size. + * </p> + */ + public class CmsAuthenticatedDataParser + : CmsContentInfoParser + { + internal RecipientInformationStore _recipientInfoStore; + internal AuthenticatedDataParser authData; + + private AlgorithmIdentifier macAlg; + private byte[] mac; + private Asn1.Cms.AttributeTable authAttrs; + private Asn1.Cms.AttributeTable unauthAttrs; + + private bool authAttrNotRead; + private bool unauthAttrNotRead; + + public CmsAuthenticatedDataParser( + byte[] envelopedData) + : this(new MemoryStream(envelopedData, false)) + { + } + + public CmsAuthenticatedDataParser( + Stream envelopedData) + : base(envelopedData) + { + this.authAttrNotRead = true; + this.authData = new AuthenticatedDataParser( + (Asn1SequenceParser)contentInfo.GetContent(Asn1Tags.Sequence)); + + // TODO Validate version? + //DerInteger version = this.authData.getVersion(); + + // + // read the recipients + // + Asn1Set recipientInfos = Asn1Set.GetInstance(authData.GetRecipientInfos().ToAsn1Object()); + + this.macAlg = authData.GetMacAlgorithm(); + + // + // read the authenticated content info + // + ContentInfoParser data = authData.GetEnapsulatedContentInfo(); + CmsReadable readable = new CmsProcessableInputStream( + ((Asn1OctetStringParser)data.GetContent(Asn1Tags.OctetString)).GetOctetStream()); + CmsSecureReadable secureReadable = new CmsEnvelopedHelper.CmsAuthenticatedSecureReadable( + this.macAlg, readable); + + // + // build the RecipientInformationStore + // + this._recipientInfoStore = CmsEnvelopedHelper.BuildRecipientInformationStore( + recipientInfos, secureReadable); + } + + public AlgorithmIdentifier MacAlgorithmID + { + get { return macAlg; } + } + + /** + * return the object identifier for the mac algorithm. + */ + public string MacAlgOid + { + get { return macAlg.ObjectID.Id; } + } + + + /** + * return the ASN.1 encoded encryption algorithm parameters, or null if + * there aren't any. + */ + public Asn1Object MacAlgParams + { + get + { + Asn1Encodable ae = macAlg.Parameters; + + return ae == null ? null : ae.ToAsn1Object(); + } + } + + /** + * return a store of the intended recipients for this message + */ + public RecipientInformationStore GetRecipientInfos() + { + return _recipientInfoStore; + } + + public byte[] GetMac() + { + if (mac == null) + { + GetAuthAttrs(); + mac = authData.GetMac().GetOctets(); + } + return Arrays.Clone(mac); + } + + /** + * return a table of the unauthenticated attributes indexed by + * the OID of the attribute. + * @exception java.io.IOException + */ + public Asn1.Cms.AttributeTable GetAuthAttrs() + { + if (authAttrs == null && authAttrNotRead) + { + Asn1SetParser s = authData.GetAuthAttrs(); + + authAttrNotRead = false; + + if (s != null) + { + Asn1EncodableVector v = new Asn1EncodableVector(); + + IAsn1Convertible o; + while ((o = s.ReadObject()) != null) + { + Asn1SequenceParser seq = (Asn1SequenceParser)o; + + v.Add(seq.ToAsn1Object()); + } + + authAttrs = new Asn1.Cms.AttributeTable(new DerSet(v)); + } + } + + return authAttrs; + } + + /** + * return a table of the unauthenticated attributes indexed by + * the OID of the attribute. + * @exception java.io.IOException + */ + public Asn1.Cms.AttributeTable GetUnauthAttrs() + { + if (unauthAttrs == null && unauthAttrNotRead) + { + Asn1SetParser s = authData.GetUnauthAttrs(); + + unauthAttrNotRead = false; + + if (s != null) + { + Asn1EncodableVector v = new Asn1EncodableVector(); + + IAsn1Convertible o; + while ((o = s.ReadObject()) != null) + { + Asn1SequenceParser seq = (Asn1SequenceParser)o; + + v.Add(seq.ToAsn1Object()); + } + + unauthAttrs = new Asn1.Cms.AttributeTable(new DerSet(v)); + } + } + + return unauthAttrs; + } + } +} diff --git a/Crypto/src/cms/CMSAuthenticatedDataStreamGenerator.cs b/Crypto/src/cms/CMSAuthenticatedDataStreamGenerator.cs new file mode 100644 index 000000000..c133ae240 --- /dev/null +++ b/Crypto/src/cms/CMSAuthenticatedDataStreamGenerator.cs @@ -0,0 +1,275 @@ +using System; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.Generators; +using Org.BouncyCastle.Crypto.IO; +using Org.BouncyCastle.Crypto.Parameters; +using Org.BouncyCastle.Security; +using Org.BouncyCastle.Utilities.IO; + +namespace Org.BouncyCastle.Cms +{ + /** + * General class for generating a CMS authenticated-data message stream. + * <p> + * A simple example of usage. + * <pre> + * CMSAuthenticatedDataStreamGenerator edGen = new CMSAuthenticatedDataStreamGenerator(); + * + * edGen.addKeyTransRecipient(cert); + * + * ByteArrayOutputStream bOut = new ByteArrayOutputStream(); + * + * OutputStream out = edGen.open( + * bOut, CMSAuthenticatedDataGenerator.AES128_CBC, "BC");* + * out.write(data); + * + * out.close(); + * </pre> + * </p> + */ + public class CmsAuthenticatedDataStreamGenerator + : CmsAuthenticatedGenerator + { + // TODO Add support +// private object _originatorInfo = null; +// private object _unprotectedAttributes = null; + private int _bufferSize; + private bool _berEncodeRecipientSet; + + /** + * base constructor + */ + public CmsAuthenticatedDataStreamGenerator() + { + } + + /** + * constructor allowing specific source of randomness + * @param rand instance of SecureRandom to use + */ + public CmsAuthenticatedDataStreamGenerator( + SecureRandom rand) + : base(rand) + { + } + + /** + * Set the underlying string size for encapsulated data + * + * @param bufferSize length of octet strings to buffer the data. + */ + public void SetBufferSize( + int bufferSize) + { + _bufferSize = bufferSize; + } + + /** + * Use a BER Set to store the recipient information + */ + public void SetBerEncodeRecipients( + bool berEncodeRecipientSet) + { + _berEncodeRecipientSet = berEncodeRecipientSet; + } + + /** + * generate an enveloped object that contains an CMS Enveloped Data + * object using the given provider and the passed in key generator. + * @throws java.io.IOException + */ + private Stream Open( + Stream outStr, + string macOid, + CipherKeyGenerator keyGen) + { + // FIXME Will this work for macs? + byte[] encKeyBytes = keyGen.GenerateKey(); + KeyParameter encKey = ParameterUtilities.CreateKeyParameter(macOid, encKeyBytes); + + Asn1Encodable asn1Params = GenerateAsn1Parameters(macOid, encKeyBytes); + + ICipherParameters cipherParameters; + AlgorithmIdentifier macAlgId = GetAlgorithmIdentifier( + macOid, encKey, asn1Params, out cipherParameters); + + Asn1EncodableVector recipientInfos = new Asn1EncodableVector(); + + foreach (RecipientInfoGenerator rig in recipientInfoGenerators) + { + try + { + recipientInfos.Add(rig.Generate(encKey, rand)); + } + catch (InvalidKeyException e) + { + throw new CmsException("key inappropriate for algorithm.", e); + } + catch (GeneralSecurityException e) + { + throw new CmsException("error making encrypted content.", e); + } + } + + // FIXME Only passing key at the moment +// return Open(outStr, macAlgId, cipherParameters, recipientInfos); + return Open(outStr, macAlgId, encKey, recipientInfos); + } + + protected Stream Open( + Stream outStr, + AlgorithmIdentifier macAlgId, + ICipherParameters cipherParameters, + Asn1EncodableVector recipientInfos) + { + try + { + // + // ContentInfo + // + BerSequenceGenerator cGen = new BerSequenceGenerator(outStr); + + cGen.AddObject(CmsObjectIdentifiers.AuthenticatedData); + + // + // Authenticated Data + // + BerSequenceGenerator authGen = new BerSequenceGenerator( + cGen.GetRawOutputStream(), 0, true); + + authGen.AddObject(new DerInteger(AuthenticatedData.CalculateVersion(null))); + + Stream authRaw = authGen.GetRawOutputStream(); + Asn1Generator recipGen = _berEncodeRecipientSet + ? (Asn1Generator) new BerSetGenerator(authRaw) + : new DerSetGenerator(authRaw); + + foreach (Asn1Encodable ae in recipientInfos) + { + recipGen.AddObject(ae); + } + + recipGen.Close(); + + authGen.AddObject(macAlgId); + + BerSequenceGenerator eiGen = new BerSequenceGenerator(authRaw); + eiGen.AddObject(CmsObjectIdentifiers.Data); + + Stream octetOutputStream = CmsUtilities.CreateBerOctetOutputStream( + eiGen.GetRawOutputStream(), 0, false, _bufferSize); + + IMac mac = MacUtilities.GetMac(macAlgId.ObjectID); + // TODO Confirm no ParametersWithRandom needed + mac.Init(cipherParameters); + Stream mOut = new TeeOutputStream(octetOutputStream, new MacOutputStream(mac)); + + return new CmsAuthenticatedDataOutputStream(mOut, mac, cGen, authGen, eiGen); + } + catch (SecurityUtilityException e) + { + throw new CmsException("couldn't create cipher.", e); + } + catch (InvalidKeyException e) + { + throw new CmsException("key invalid in message.", e); + } + catch (IOException e) + { + throw new CmsException("exception decoding algorithm parameters.", e); + } + } + + /** + * generate an enveloped object that contains an CMS Enveloped Data object + */ + public Stream Open( + Stream outStr, + string encryptionOid) + { + CipherKeyGenerator keyGen = GeneratorUtilities.GetKeyGenerator(encryptionOid); + + keyGen.Init(new KeyGenerationParameters(rand, keyGen.DefaultStrength)); + + return Open(outStr, encryptionOid, keyGen); + } + + /** + * generate an enveloped object that contains an CMS Enveloped Data object + */ + public Stream Open( + Stream outStr, + string encryptionOid, + int keySize) + { + CipherKeyGenerator keyGen = GeneratorUtilities.GetKeyGenerator(encryptionOid); + + keyGen.Init(new KeyGenerationParameters(rand, keySize)); + + return Open(outStr, encryptionOid, keyGen); + } + + private class CmsAuthenticatedDataOutputStream + : BaseOutputStream + { + private readonly Stream macStream; + private readonly IMac mac; + private readonly BerSequenceGenerator cGen; + private readonly BerSequenceGenerator authGen; + private readonly BerSequenceGenerator eiGen; + + public CmsAuthenticatedDataOutputStream( + Stream macStream, + IMac mac, + BerSequenceGenerator cGen, + BerSequenceGenerator authGen, + BerSequenceGenerator eiGen) + { + this.macStream = macStream; + this.mac = mac; + this.cGen = cGen; + this.authGen = authGen; + this.eiGen = eiGen; + } + + public override void WriteByte( + byte b) + { + macStream.WriteByte(b); + } + + public override void Write( + byte[] bytes, + int off, + int len) + { + macStream.Write(bytes, off, len); + } + + protected override void Dispose(bool disposing) + { + if (disposing) + { + macStream.Dispose(); + + // TODO Parent context(s) should really be be closed explicitly + + eiGen.Close(); + + // [TODO] auth attributes go here + byte[] macOctets = MacUtilities.DoFinal(mac); + authGen.AddObject(new DerOctetString(macOctets)); + // [TODO] unauth attributes go here + + authGen.Close(); + cGen.Close(); + } + } + } + } +} diff --git a/Crypto/src/cms/CMSAuthenticatedGenerator.cs b/Crypto/src/cms/CMSAuthenticatedGenerator.cs new file mode 100644 index 000000000..8824d1913 --- /dev/null +++ b/Crypto/src/cms/CMSAuthenticatedGenerator.cs @@ -0,0 +1,35 @@ +using System; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.Parameters; +using Org.BouncyCastle.Security; +using Org.BouncyCastle.Utilities.Date; +using Org.BouncyCastle.Utilities.IO; + +namespace Org.BouncyCastle.Cms +{ + public class CmsAuthenticatedGenerator + : CmsEnvelopedGenerator + { + /** + * base constructor + */ + public CmsAuthenticatedGenerator() + { + } + + /** + * constructor allowing specific source of randomness + * + * @param rand instance of SecureRandom to use + */ + public CmsAuthenticatedGenerator( + SecureRandom rand) + : base(rand) + { + } + } +} diff --git a/Crypto/src/cms/CMSCompressedData.cs b/Crypto/src/cms/CMSCompressedData.cs new file mode 100644 index 000000000..55d06b5b8 --- /dev/null +++ b/Crypto/src/cms/CMSCompressedData.cs @@ -0,0 +1,107 @@ +using System; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Utilities.Zlib; + +namespace Org.BouncyCastle.Cms +{ + /** + * containing class for an CMS Compressed Data object + */ + public class CmsCompressedData + { + internal ContentInfo contentInfo; + + public CmsCompressedData( + byte[] compressedData) + : this(CmsUtilities.ReadContentInfo(compressedData)) + { + } + + public CmsCompressedData( + Stream compressedDataStream) + : this(CmsUtilities.ReadContentInfo(compressedDataStream)) + { + } + + public CmsCompressedData( + ContentInfo contentInfo) + { + this.contentInfo = contentInfo; + } + + /** + * Return the uncompressed content. + * + * @return the uncompressed content + * @throws CmsException if there is an exception uncompressing the data. + */ + public byte[] GetContent() + { + CompressedData comData = CompressedData.GetInstance(contentInfo.Content); + ContentInfo content = comData.EncapContentInfo; + + Asn1OctetString bytes = (Asn1OctetString) content.Content; + ZInputStream zIn = new ZInputStream(bytes.GetOctetStream()); + + try + { + return CmsUtilities.StreamToByteArray(zIn); + } + catch (IOException e) + { + throw new CmsException("exception reading compressed stream.", e); + } + finally + { + zIn.Dispose(); + } + } + + /** + * Return the uncompressed content, throwing an exception if the data size + * is greater than the passed in limit. If the content is exceeded getCause() + * on the CMSException will contain a StreamOverflowException + * + * @param limit maximum number of bytes to read + * @return the content read + * @throws CMSException if there is an exception uncompressing the data. + */ + public byte[] GetContent(int limit) + { + CompressedData comData = CompressedData.GetInstance(contentInfo.Content); + ContentInfo content = comData.EncapContentInfo; + + Asn1OctetString bytes = (Asn1OctetString)content.Content; + + ZInputStream zIn = new ZInputStream(new MemoryStream(bytes.GetOctets(), false)); + + try + { + return CmsUtilities.StreamToByteArray(zIn, limit); + } + catch (IOException e) + { + throw new CmsException("exception reading compressed stream.", e); + } + } + + /** + * return the ContentInfo + */ + public ContentInfo ContentInfo + { + get { return contentInfo; } + } + + /** + * return the ASN.1 encoded representation of this object. + */ + public byte[] GetEncoded() + { + return contentInfo.GetEncoded(); + } + } +} diff --git a/Crypto/src/cms/CMSCompressedDataGenerator.cs b/Crypto/src/cms/CMSCompressedDataGenerator.cs new file mode 100644 index 000000000..a6381ced6 --- /dev/null +++ b/Crypto/src/cms/CMSCompressedDataGenerator.cs @@ -0,0 +1,66 @@ +using System; +using System.Collections; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Utilities.Zlib; + +namespace Org.BouncyCastle.Cms +{ + /** + * General class for generating a compressed CMS message. + * <p> + * A simple example of usage.</p> + * <p> + * <pre> + * CMSCompressedDataGenerator fact = new CMSCompressedDataGenerator(); + * CMSCompressedData data = fact.Generate(content, algorithm); + * </pre> + * </p> + */ + public class CmsCompressedDataGenerator + { + public const string ZLib = "1.2.840.113549.1.9.16.3.8"; + + public CmsCompressedDataGenerator() + { + } + + /** + * Generate an object that contains an CMS Compressed Data + */ + public CmsCompressedData Generate( + CmsProcessable content, + string compressionOid) + { + AlgorithmIdentifier comAlgId; + Asn1OctetString comOcts; + + try + { + MemoryStream bOut = new MemoryStream(); + ZOutputStream zOut = new ZOutputStream(bOut, JZlib.Z_DEFAULT_COMPRESSION); + + content.Write(zOut); + + zOut.Dispose(); + + comAlgId = new AlgorithmIdentifier(new DerObjectIdentifier(compressionOid)); + comOcts = new BerOctetString(bOut.ToArray()); + } + catch (IOException e) + { + throw new CmsException("exception encoding data.", e); + } + + ContentInfo comContent = new ContentInfo(CmsObjectIdentifiers.Data, comOcts); + ContentInfo contentInfo = new ContentInfo( + CmsObjectIdentifiers.CompressedData, + new CompressedData(comAlgId, comContent)); + + return new CmsCompressedData(contentInfo); + } + } +} diff --git a/Crypto/src/cms/CMSCompressedDataParser.cs b/Crypto/src/cms/CMSCompressedDataParser.cs new file mode 100644 index 000000000..93dfa1286 --- /dev/null +++ b/Crypto/src/cms/CMSCompressedDataParser.cs @@ -0,0 +1,57 @@ +using System; +using System.Collections; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Utilities.Zlib; + +namespace Org.BouncyCastle.Cms +{ + /** + * Class for reading a CMS Compressed Data stream. + * <pre> + * CMSCompressedDataParser cp = new CMSCompressedDataParser(inputStream); + * + * process(cp.GetContent().GetContentStream()); + * </pre> + * Note: this class does not introduce buffering - if you are processing large files you should create + * the parser with: + * <pre> + * CMSCompressedDataParser ep = new CMSCompressedDataParser(new BufferedInputStream(inputStream, bufSize)); + * </pre> + * where bufSize is a suitably large buffer size. + */ + public class CmsCompressedDataParser + : CmsContentInfoParser + { + public CmsCompressedDataParser( + byte[] compressedData) + : this(new MemoryStream(compressedData, false)) + { + } + + public CmsCompressedDataParser( + Stream compressedData) + : base(compressedData) + { + } + + public CmsTypedStream GetContent() + { + try + { + CompressedDataParser comData = new CompressedDataParser((Asn1SequenceParser)this.contentInfo.GetContent(Asn1Tags.Sequence)); + ContentInfoParser content = comData.GetEncapContentInfo(); + + Asn1OctetStringParser bytes = (Asn1OctetStringParser)content.GetContent(Asn1Tags.OctetString); + + return new CmsTypedStream(content.ContentType.ToString(), new ZInputStream(bytes.GetOctetStream())); + } + catch (IOException e) + { + throw new CmsException("IOException reading compressed content.", e); + } + } + } +} diff --git a/Crypto/src/cms/CMSCompressedDataStreamGenerator.cs b/Crypto/src/cms/CMSCompressedDataStreamGenerator.cs new file mode 100644 index 000000000..13006d4b0 --- /dev/null +++ b/Crypto/src/cms/CMSCompressedDataStreamGenerator.cs @@ -0,0 +1,144 @@ +using System; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Utilities.IO; +using Org.BouncyCastle.Utilities.Zlib; + +namespace Org.BouncyCastle.Cms +{ + /** + * General class for generating a compressed CMS message stream. + * <p> + * A simple example of usage. + * </p> + * <pre> + * CMSCompressedDataStreamGenerator gen = new CMSCompressedDataStreamGenerator(); + * + * Stream cOut = gen.Open(outputStream, CMSCompressedDataStreamGenerator.ZLIB); + * + * cOut.Write(data); + * + * cOut.Close(); + * </pre> + */ + public class CmsCompressedDataStreamGenerator + { + public const string ZLib = "1.2.840.113549.1.9.16.3.8"; + + private int _bufferSize; + + /** + * base constructor + */ + public CmsCompressedDataStreamGenerator() + { + } + + /** + * Set the underlying string size for encapsulated data + * + * @param bufferSize length of octet strings to buffer the data. + */ + public void SetBufferSize( + int bufferSize) + { + _bufferSize = bufferSize; + } + + public Stream Open( + Stream outStream, + string compressionOID) + { + return Open(outStream, CmsObjectIdentifiers.Data.Id, compressionOID); + } + + public Stream Open( + Stream outStream, + string contentOID, + string compressionOID) + { + BerSequenceGenerator sGen = new BerSequenceGenerator(outStream); + + sGen.AddObject(CmsObjectIdentifiers.CompressedData); + + // + // Compressed Data + // + BerSequenceGenerator cGen = new BerSequenceGenerator( + sGen.GetRawOutputStream(), 0, true); + + // CMSVersion + cGen.AddObject(new DerInteger(0)); + + // CompressionAlgorithmIdentifier + cGen.AddObject(new AlgorithmIdentifier(new DerObjectIdentifier(ZLib))); + + // + // Encapsulated ContentInfo + // + BerSequenceGenerator eiGen = new BerSequenceGenerator(cGen.GetRawOutputStream()); + + eiGen.AddObject(new DerObjectIdentifier(contentOID)); + + Stream octetStream = CmsUtilities.CreateBerOctetOutputStream( + eiGen.GetRawOutputStream(), 0, true, _bufferSize); + + return new CmsCompressedOutputStream( + new ZOutputStream(octetStream, JZlib.Z_DEFAULT_COMPRESSION), sGen, cGen, eiGen); + } + + private class CmsCompressedOutputStream + : BaseOutputStream + { + private ZOutputStream _out; + private BerSequenceGenerator _sGen; + private BerSequenceGenerator _cGen; + private BerSequenceGenerator _eiGen; + + internal CmsCompressedOutputStream( + ZOutputStream outStream, + BerSequenceGenerator sGen, + BerSequenceGenerator cGen, + BerSequenceGenerator eiGen) + { + _out = outStream; + _sGen = sGen; + _cGen = cGen; + _eiGen = eiGen; + } + + public override void WriteByte( + byte b) + { + _out.WriteByte(b); + } + + public override void Write( + byte[] bytes, + int off, + int len) + { + _out.Write(bytes, off, len); + } + + protected override void Dispose(bool disposing) + { + if (disposing) + { + _out.Dispose(); + + // TODO Parent context(s) should really be be closed explicitly + + _eiGen.Close(); + _cGen.Close(); + _sGen.Close(); + } + + base.Dispose(disposing); + } + } + } +} diff --git a/Crypto/src/cms/CMSContentInfoParser.cs b/Crypto/src/cms/CMSContentInfoParser.cs new file mode 100644 index 000000000..5b1606394 --- /dev/null +++ b/Crypto/src/cms/CMSContentInfoParser.cs @@ -0,0 +1,47 @@ +using System; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; + +namespace Org.BouncyCastle.Cms +{ + public class CmsContentInfoParser + { + protected ContentInfoParser contentInfo; + protected Stream data; + + protected CmsContentInfoParser( + Stream data) + { + if (data == null) + throw new ArgumentNullException("data"); + + this.data = data; + + try + { + Asn1StreamParser inStream = new Asn1StreamParser(data); + + this.contentInfo = new ContentInfoParser((Asn1SequenceParser)inStream.ReadObject()); + } + catch (IOException e) + { + throw new CmsException("IOException reading content.", e); + } + catch (InvalidCastException e) + { + throw new CmsException("Unexpected object reading content.", e); + } + } + + /** + * Close the underlying data stream. + * @throws IOException if the close fails. + */ + public void Close() + { + this.data.Dispose(); + } + } +} diff --git a/Crypto/src/cms/CMSEnvelopedData.cs b/Crypto/src/cms/CMSEnvelopedData.cs new file mode 100644 index 000000000..0731c307e --- /dev/null +++ b/Crypto/src/cms/CMSEnvelopedData.cs @@ -0,0 +1,115 @@ +using System; +using System.Collections; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Security; + +namespace Org.BouncyCastle.Cms +{ + /** + * containing class for an CMS Enveloped Data object + */ + public class CmsEnvelopedData + { + internal RecipientInformationStore recipientInfoStore; + internal ContentInfo contentInfo; + + private AlgorithmIdentifier encAlg; + private Asn1Set unprotectedAttributes; + + public CmsEnvelopedData( + byte[] envelopedData) + : this(CmsUtilities.ReadContentInfo(envelopedData)) + { + } + + public CmsEnvelopedData( + Stream envelopedData) + : this(CmsUtilities.ReadContentInfo(envelopedData)) + { + } + + public CmsEnvelopedData( + ContentInfo contentInfo) + { + this.contentInfo = contentInfo; + + EnvelopedData envData = EnvelopedData.GetInstance(contentInfo.Content); + + // + // read the recipients + // + Asn1Set recipientInfos = envData.RecipientInfos; + + // + // read the encrypted content info + // + EncryptedContentInfo encInfo = envData.EncryptedContentInfo; + this.encAlg = encInfo.ContentEncryptionAlgorithm; + CmsReadable readable = new CmsProcessableByteArray(encInfo.EncryptedContent.GetOctets()); + CmsSecureReadable secureReadable = new CmsEnvelopedHelper.CmsEnvelopedSecureReadable( + this.encAlg, readable); + + // + // build the RecipientInformationStore + // + this.recipientInfoStore = CmsEnvelopedHelper.BuildRecipientInformationStore( + recipientInfos, secureReadable); + + this.unprotectedAttributes = envData.UnprotectedAttrs; + } + + public AlgorithmIdentifier EncryptionAlgorithmID + { + get { return encAlg; } + } + + /** + * return the object identifier for the content encryption algorithm. + */ + public string EncryptionAlgOid + { + get { return encAlg.ObjectID.Id; } + } + + /** + * return a store of the intended recipients for this message + */ + public RecipientInformationStore GetRecipientInfos() + { + return recipientInfoStore; + } + + /** + * return the ContentInfo + */ + public ContentInfo ContentInfo + { + get { return contentInfo; } + } + + /** + * return a table of the unprotected attributes indexed by + * the OID of the attribute. + */ + public Asn1.Cms.AttributeTable GetUnprotectedAttributes() + { + if (unprotectedAttributes == null) + return null; + + return new Asn1.Cms.AttributeTable(unprotectedAttributes); + } + + /** + * return the ASN.1 encoded representation of this object. + */ + public byte[] GetEncoded() + { + return contentInfo.GetEncoded(); + } + } +} diff --git a/Crypto/src/cms/CMSEnvelopedDataGenerator.cs b/Crypto/src/cms/CMSEnvelopedDataGenerator.cs new file mode 100644 index 000000000..5071af4ad --- /dev/null +++ b/Crypto/src/cms/CMSEnvelopedDataGenerator.cs @@ -0,0 +1,178 @@ +using System; +using System.Collections; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.Nist; +using Org.BouncyCastle.Asn1.Oiw; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Asn1.X9; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.Generators; +using Org.BouncyCastle.Crypto.IO; +using Org.BouncyCastle.Crypto.Parameters; +using Org.BouncyCastle.Math; +using Org.BouncyCastle.Security; +using Org.BouncyCastle.Utilities; +using Org.BouncyCastle.Utilities.Date; +using Org.BouncyCastle.X509; + +namespace Org.BouncyCastle.Cms +{ + /// <remarks> + /// General class for generating a CMS enveloped-data message. + /// + /// A simple example of usage. + /// + /// <pre> + /// CmsEnvelopedDataGenerator fact = new CmsEnvelopedDataGenerator(); + /// + /// fact.AddKeyTransRecipient(cert); + /// + /// CmsEnvelopedData data = fact.Generate(content, algorithm); + /// </pre> + /// </remarks> + public class CmsEnvelopedDataGenerator + : CmsEnvelopedGenerator + { + public CmsEnvelopedDataGenerator() + { + } + + /// <summary>Constructor allowing specific source of randomness</summary> + /// <param name="rand">Instance of <c>SecureRandom</c> to use.</param> + public CmsEnvelopedDataGenerator( + SecureRandom rand) + : base(rand) + { + } + + /// <summary> + /// Generate an enveloped object that contains a CMS Enveloped Data + /// object using the passed in key generator. + /// </summary> + private CmsEnvelopedData Generate( + CmsProcessable content, + string encryptionOid, + CipherKeyGenerator keyGen) + { + AlgorithmIdentifier encAlgId = null; + KeyParameter encKey; + Asn1OctetString encContent; + + try + { + byte[] encKeyBytes = keyGen.GenerateKey(); + encKey = ParameterUtilities.CreateKeyParameter(encryptionOid, encKeyBytes); + + Asn1Encodable asn1Params = GenerateAsn1Parameters(encryptionOid, encKeyBytes); + + ICipherParameters cipherParameters; + encAlgId = GetAlgorithmIdentifier( + encryptionOid, encKey, asn1Params, out cipherParameters); + + IBufferedCipher cipher = CipherUtilities.GetCipher(encryptionOid); + cipher.Init(true, new ParametersWithRandom(cipherParameters, rand)); + + MemoryStream bOut = new MemoryStream(); + CipherStream cOut = new CipherStream(bOut, null, cipher); + + content.Write(cOut); + + cOut.Dispose(); + + encContent = new BerOctetString(bOut.ToArray()); + } + catch (SecurityUtilityException e) + { + throw new CmsException("couldn't create cipher.", e); + } + catch (InvalidKeyException e) + { + throw new CmsException("key invalid in message.", e); + } + catch (IOException e) + { + throw new CmsException("exception decoding algorithm parameters.", e); + } + + + Asn1EncodableVector recipientInfos = new Asn1EncodableVector(); + + foreach (RecipientInfoGenerator rig in recipientInfoGenerators) + { + try + { + recipientInfos.Add(rig.Generate(encKey, rand)); + } + catch (InvalidKeyException e) + { + throw new CmsException("key inappropriate for algorithm.", e); + } + catch (GeneralSecurityException e) + { + throw new CmsException("error making encrypted content.", e); + } + } + + EncryptedContentInfo eci = new EncryptedContentInfo( + CmsObjectIdentifiers.Data, + encAlgId, + encContent); + + Asn1Set unprotectedAttrSet = null; + if (unprotectedAttributeGenerator != null) + { + Asn1.Cms.AttributeTable attrTable = unprotectedAttributeGenerator.GetAttributes(Platform.CreateHashtable()); + + unprotectedAttrSet = new BerSet(attrTable.ToAsn1EncodableVector()); + } + + ContentInfo contentInfo = new ContentInfo( + CmsObjectIdentifiers.EnvelopedData, + new EnvelopedData(null, new DerSet(recipientInfos), eci, unprotectedAttrSet)); + + return new CmsEnvelopedData(contentInfo); + } + + /// <summary>Generate an enveloped object that contains an CMS Enveloped Data object.</summary> + public CmsEnvelopedData Generate( + CmsProcessable content, + string encryptionOid) + { + try + { + CipherKeyGenerator keyGen = GeneratorUtilities.GetKeyGenerator(encryptionOid); + + keyGen.Init(new KeyGenerationParameters(rand, keyGen.DefaultStrength)); + + return Generate(content, encryptionOid, keyGen); + } + catch (SecurityUtilityException e) + { + throw new CmsException("can't find key generation algorithm.", e); + } + } + + /// <summary>Generate an enveloped object that contains an CMS Enveloped Data object.</summary> + public CmsEnvelopedData Generate( + CmsProcessable content, + string encryptionOid, + int keySize) + { + try + { + CipherKeyGenerator keyGen = GeneratorUtilities.GetKeyGenerator(encryptionOid); + + keyGen.Init(new KeyGenerationParameters(rand, keySize)); + + return Generate(content, encryptionOid, keyGen); + } + catch (SecurityUtilityException e) + { + throw new CmsException("can't find key generation algorithm.", e); + } + } + } +} diff --git a/Crypto/src/cms/CMSEnvelopedDataParser.cs b/Crypto/src/cms/CMSEnvelopedDataParser.cs new file mode 100644 index 000000000..01a949d47 --- /dev/null +++ b/Crypto/src/cms/CMSEnvelopedDataParser.cs @@ -0,0 +1,161 @@ +using System; +using System.Collections; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto; + +namespace Org.BouncyCastle.Cms +{ + /** + * Parsing class for an CMS Enveloped Data object from an input stream. + * <p> + * Note: that because we are in a streaming mode only one recipient can be tried and it is important + * that the methods on the parser are called in the appropriate order. + * </p> + * <p> + * Example of use - assuming the first recipient matches the private key we have. + * <pre> + * CmsEnvelopedDataParser ep = new CmsEnvelopedDataParser(inputStream); + * + * RecipientInformationStore recipients = ep.GetRecipientInfos(); + * + * Collection c = recipients.getRecipients(); + * Iterator it = c.iterator(); + * + * if (it.hasNext()) + * { + * RecipientInformation recipient = (RecipientInformation)it.next(); + * + * CMSTypedStream recData = recipient.getContentStream(privateKey); + * + * processDataStream(recData.getContentStream()); + * } + * </pre> + * Note: this class does not introduce buffering - if you are processing large files you should create + * the parser with: + * <pre> + * CmsEnvelopedDataParser ep = new CmsEnvelopedDataParser(new BufferedInputStream(inputStream, bufSize)); + * </pre> + * where bufSize is a suitably large buffer size. + * </p> + */ + public class CmsEnvelopedDataParser + : CmsContentInfoParser + { + internal RecipientInformationStore recipientInfoStore; + internal EnvelopedDataParser envelopedData; + + private AlgorithmIdentifier _encAlg; + private Asn1.Cms.AttributeTable _unprotectedAttributes; + private bool _attrNotRead; + + public CmsEnvelopedDataParser( + byte[] envelopedData) + : this(new MemoryStream(envelopedData, false)) + { + } + + public CmsEnvelopedDataParser( + Stream envelopedData) + : base(envelopedData) + { + this._attrNotRead = true; + this.envelopedData = new EnvelopedDataParser( + (Asn1SequenceParser)this.contentInfo.GetContent(Asn1Tags.Sequence)); + + // TODO Validate version? + //DerInteger version = this.envelopedData.Version; + + // + // read the recipients + // + Asn1Set recipientInfos = Asn1Set.GetInstance(this.envelopedData.GetRecipientInfos().ToAsn1Object()); + + // + // read the encrypted content info + // + EncryptedContentInfoParser encInfo = this.envelopedData.GetEncryptedContentInfo(); + this._encAlg = encInfo.ContentEncryptionAlgorithm; + CmsReadable readable = new CmsProcessableInputStream( + ((Asn1OctetStringParser)encInfo.GetEncryptedContent(Asn1Tags.OctetString)).GetOctetStream()); + CmsSecureReadable secureReadable = new CmsEnvelopedHelper.CmsEnvelopedSecureReadable( + this._encAlg, readable); + + // + // build the RecipientInformationStore + // + this.recipientInfoStore = CmsEnvelopedHelper.BuildRecipientInformationStore( + recipientInfos, secureReadable); + } + + public AlgorithmIdentifier EncryptionAlgorithmID + { + get { return _encAlg; } + } + + /** + * return the object identifier for the content encryption algorithm. + */ + public string EncryptionAlgOid + { + get { return _encAlg.ObjectID.Id; } + } + + /** + * return the ASN.1 encoded encryption algorithm parameters, or null if + * there aren't any. + */ + public Asn1Object EncryptionAlgParams + { + get + { + Asn1Encodable ae = _encAlg.Parameters; + + return ae == null ? null : ae.ToAsn1Object(); + } + } + + /** + * return a store of the intended recipients for this message + */ + public RecipientInformationStore GetRecipientInfos() + { + return this.recipientInfoStore; + } + + /** + * return a table of the unprotected attributes indexed by + * the OID of the attribute. + * @throws IOException + */ + public Asn1.Cms.AttributeTable GetUnprotectedAttributes() + { + if (_unprotectedAttributes == null && _attrNotRead) + { + Asn1SetParser asn1Set = this.envelopedData.GetUnprotectedAttrs(); + + _attrNotRead = false; + + if (asn1Set != null) + { + Asn1EncodableVector v = new Asn1EncodableVector(); + IAsn1Convertible o; + + while ((o = asn1Set.ReadObject()) != null) + { + Asn1SequenceParser seq = (Asn1SequenceParser)o; + + v.Add(seq.ToAsn1Object()); + } + + _unprotectedAttributes = new Asn1.Cms.AttributeTable(new DerSet(v)); + } + } + + return _unprotectedAttributes; + } + } +} diff --git a/Crypto/src/cms/CMSEnvelopedDataStreamGenerator.cs b/Crypto/src/cms/CMSEnvelopedDataStreamGenerator.cs new file mode 100644 index 000000000..820ddfe16 --- /dev/null +++ b/Crypto/src/cms/CMSEnvelopedDataStreamGenerator.cs @@ -0,0 +1,285 @@ +using System; +using System.Collections; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.Nist; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.Engines; +using Org.BouncyCastle.Crypto.Generators; +using Org.BouncyCastle.Crypto.IO; +using Org.BouncyCastle.Crypto.Parameters; +using Org.BouncyCastle.Security; +using Org.BouncyCastle.Security.Certificates; +using Org.BouncyCastle.Utilities; +using Org.BouncyCastle.Utilities.IO; +using Org.BouncyCastle.X509; + +namespace Org.BouncyCastle.Cms +{ + /** + * General class for generating a CMS enveloped-data message stream. + * <p> + * A simple example of usage. + * <pre> + * CmsEnvelopedDataStreamGenerator edGen = new CmsEnvelopedDataStreamGenerator(); + * + * edGen.AddKeyTransRecipient(cert); + * + * MemoryStream bOut = new MemoryStream(); + * + * Stream out = edGen.Open( + * bOut, CMSEnvelopedDataGenerator.AES128_CBC);* + * out.Write(data); + * + * out.Close(); + * </pre> + * </p> + */ + public class CmsEnvelopedDataStreamGenerator + : CmsEnvelopedGenerator + { + private object _originatorInfo = null; + private object _unprotectedAttributes = null; + private int _bufferSize; + private bool _berEncodeRecipientSet; + + public CmsEnvelopedDataStreamGenerator() + { + } + + /// <summary>Constructor allowing specific source of randomness</summary> + /// <param name="rand">Instance of <c>SecureRandom</c> to use.</param> + public CmsEnvelopedDataStreamGenerator( + SecureRandom rand) + : base(rand) + { + } + + /// <summary>Set the underlying string size for encapsulated data.</summary> + /// <param name="bufferSize">Length of octet strings to buffer the data.</param> + public void SetBufferSize( + int bufferSize) + { + _bufferSize = bufferSize; + } + + /// <summary>Use a BER Set to store the recipient information.</summary> + public void SetBerEncodeRecipients( + bool berEncodeRecipientSet) + { + _berEncodeRecipientSet = berEncodeRecipientSet; + } + + private DerInteger Version + { + get + { + int version = (_originatorInfo != null || _unprotectedAttributes != null) + ? 2 + : 0; + + return new DerInteger(version); + } + } + + /// <summary> + /// Generate an enveloped object that contains an CMS Enveloped Data + /// object using the passed in key generator. + /// </summary> + private Stream Open( + Stream outStream, + string encryptionOid, + CipherKeyGenerator keyGen) + { + byte[] encKeyBytes = keyGen.GenerateKey(); + KeyParameter encKey = ParameterUtilities.CreateKeyParameter(encryptionOid, encKeyBytes); + + Asn1Encodable asn1Params = GenerateAsn1Parameters(encryptionOid, encKeyBytes); + + ICipherParameters cipherParameters; + AlgorithmIdentifier encAlgID = GetAlgorithmIdentifier( + encryptionOid, encKey, asn1Params, out cipherParameters); + + Asn1EncodableVector recipientInfos = new Asn1EncodableVector(); + + foreach (RecipientInfoGenerator rig in recipientInfoGenerators) + { + try + { + recipientInfos.Add(rig.Generate(encKey, rand)); + } + catch (InvalidKeyException e) + { + throw new CmsException("key inappropriate for algorithm.", e); + } + catch (GeneralSecurityException e) + { + throw new CmsException("error making encrypted content.", e); + } + } + + return Open(outStream, encAlgID, cipherParameters, recipientInfos); + } + + private Stream Open( + Stream outStream, + AlgorithmIdentifier encAlgID, + ICipherParameters cipherParameters, + Asn1EncodableVector recipientInfos) + { + try + { + // + // ContentInfo + // + BerSequenceGenerator cGen = new BerSequenceGenerator(outStream); + + cGen.AddObject(CmsObjectIdentifiers.EnvelopedData); + + // + // Encrypted Data + // + BerSequenceGenerator envGen = new BerSequenceGenerator( + cGen.GetRawOutputStream(), 0, true); + + envGen.AddObject(this.Version); + + Stream envRaw = envGen.GetRawOutputStream(); + Asn1Generator recipGen = _berEncodeRecipientSet + ? (Asn1Generator) new BerSetGenerator(envRaw) + : new DerSetGenerator(envRaw); + + foreach (Asn1Encodable ae in recipientInfos) + { + recipGen.AddObject(ae); + } + + recipGen.Close(); + + BerSequenceGenerator eiGen = new BerSequenceGenerator(envRaw); + eiGen.AddObject(CmsObjectIdentifiers.Data); + eiGen.AddObject(encAlgID); + + Stream octetOutputStream = CmsUtilities.CreateBerOctetOutputStream( + eiGen.GetRawOutputStream(), 0, false, _bufferSize); + + IBufferedCipher cipher = CipherUtilities.GetCipher(encAlgID.ObjectID); + cipher.Init(true, new ParametersWithRandom(cipherParameters, rand)); + CipherStream cOut = new CipherStream(octetOutputStream, null, cipher); + + return new CmsEnvelopedDataOutputStream(this, cOut, cGen, envGen, eiGen); + } + catch (SecurityUtilityException e) + { + throw new CmsException("couldn't create cipher.", e); + } + catch (InvalidKeyException e) + { + throw new CmsException("key invalid in message.", e); + } + catch (IOException e) + { + throw new CmsException("exception decoding algorithm parameters.", e); + } + } + + /** + * generate an enveloped object that contains an CMS Enveloped Data object + * @throws IOException + */ + public Stream Open( + Stream outStream, + string encryptionOid) + { + CipherKeyGenerator keyGen = GeneratorUtilities.GetKeyGenerator(encryptionOid); + + keyGen.Init(new KeyGenerationParameters(rand, keyGen.DefaultStrength)); + + return Open(outStream, encryptionOid, keyGen); + } + + /** + * generate an enveloped object that contains an CMS Enveloped Data object + * @throws IOException + */ + public Stream Open( + Stream outStream, + string encryptionOid, + int keySize) + { + CipherKeyGenerator keyGen = GeneratorUtilities.GetKeyGenerator(encryptionOid); + + keyGen.Init(new KeyGenerationParameters(rand, keySize)); + + return Open(outStream, encryptionOid, keyGen); + } + + private class CmsEnvelopedDataOutputStream + : BaseOutputStream + { + private readonly CmsEnvelopedGenerator _outer; + + private readonly CipherStream _out; + private readonly BerSequenceGenerator _cGen; + private readonly BerSequenceGenerator _envGen; + private readonly BerSequenceGenerator _eiGen; + + public CmsEnvelopedDataOutputStream( + CmsEnvelopedGenerator outer, + CipherStream outStream, + BerSequenceGenerator cGen, + BerSequenceGenerator envGen, + BerSequenceGenerator eiGen) + { + _outer = outer; + _out = outStream; + _cGen = cGen; + _envGen = envGen; + _eiGen = eiGen; + } + + public override void WriteByte( + byte b) + { + _out.WriteByte(b); + } + + public override void Write( + byte[] bytes, + int off, + int len) + { + _out.Write(bytes, off, len); + } + + protected override void Dispose(bool disposing) + { + if (disposing) + { + _out.Dispose(); + + // TODO Parent context(s) should really be be closed explicitly + + _eiGen.Close(); + + if (_outer.unprotectedAttributeGenerator != null) + { + Asn1.Cms.AttributeTable attrTable = _outer.unprotectedAttributeGenerator.GetAttributes(Platform.CreateHashtable()); + + Asn1Set unprotectedAttrs = new BerSet(attrTable.ToAsn1EncodableVector()); + + _envGen.AddObject(new DerTaggedObject(false, 1, unprotectedAttrs)); + } + + _envGen.Close(); + _cGen.Close(); + } + + base.Dispose(disposing); + } + } + } +} diff --git a/Crypto/src/cms/CMSEnvelopedGenerator.cs b/Crypto/src/cms/CMSEnvelopedGenerator.cs new file mode 100644 index 000000000..f92ae3824 --- /dev/null +++ b/Crypto/src/cms/CMSEnvelopedGenerator.cs @@ -0,0 +1,331 @@ +using System; +using System.Collections; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.Kisa; +using Org.BouncyCastle.Asn1.Nist; +using Org.BouncyCastle.Asn1.Ntt; +using Org.BouncyCastle.Asn1.Pkcs; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Asn1.X9; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.Parameters; +using Org.BouncyCastle.Security; +using Org.BouncyCastle.Utilities; +using Org.BouncyCastle.X509; + +namespace Org.BouncyCastle.Cms +{ + /** + * General class for generating a CMS enveloped-data message. + * + * A simple example of usage. + * + * <pre> + * CMSEnvelopedDataGenerator fact = new CMSEnvelopedDataGenerator(); + * + * fact.addKeyTransRecipient(cert); + * + * CMSEnvelopedData data = fact.generate(content, algorithm, "BC"); + * </pre> + */ + public class CmsEnvelopedGenerator + { + // Note: These tables are complementary: If rc2Table[i]==j, then rc2Ekb[j]==i + internal static readonly short[] rc2Table = + { + 0xbd, 0x56, 0xea, 0xf2, 0xa2, 0xf1, 0xac, 0x2a, 0xb0, 0x93, 0xd1, 0x9c, 0x1b, 0x33, 0xfd, 0xd0, + 0x30, 0x04, 0xb6, 0xdc, 0x7d, 0xdf, 0x32, 0x4b, 0xf7, 0xcb, 0x45, 0x9b, 0x31, 0xbb, 0x21, 0x5a, + 0x41, 0x9f, 0xe1, 0xd9, 0x4a, 0x4d, 0x9e, 0xda, 0xa0, 0x68, 0x2c, 0xc3, 0x27, 0x5f, 0x80, 0x36, + 0x3e, 0xee, 0xfb, 0x95, 0x1a, 0xfe, 0xce, 0xa8, 0x34, 0xa9, 0x13, 0xf0, 0xa6, 0x3f, 0xd8, 0x0c, + 0x78, 0x24, 0xaf, 0x23, 0x52, 0xc1, 0x67, 0x17, 0xf5, 0x66, 0x90, 0xe7, 0xe8, 0x07, 0xb8, 0x60, + 0x48, 0xe6, 0x1e, 0x53, 0xf3, 0x92, 0xa4, 0x72, 0x8c, 0x08, 0x15, 0x6e, 0x86, 0x00, 0x84, 0xfa, + 0xf4, 0x7f, 0x8a, 0x42, 0x19, 0xf6, 0xdb, 0xcd, 0x14, 0x8d, 0x50, 0x12, 0xba, 0x3c, 0x06, 0x4e, + 0xec, 0xb3, 0x35, 0x11, 0xa1, 0x88, 0x8e, 0x2b, 0x94, 0x99, 0xb7, 0x71, 0x74, 0xd3, 0xe4, 0xbf, + 0x3a, 0xde, 0x96, 0x0e, 0xbc, 0x0a, 0xed, 0x77, 0xfc, 0x37, 0x6b, 0x03, 0x79, 0x89, 0x62, 0xc6, + 0xd7, 0xc0, 0xd2, 0x7c, 0x6a, 0x8b, 0x22, 0xa3, 0x5b, 0x05, 0x5d, 0x02, 0x75, 0xd5, 0x61, 0xe3, + 0x18, 0x8f, 0x55, 0x51, 0xad, 0x1f, 0x0b, 0x5e, 0x85, 0xe5, 0xc2, 0x57, 0x63, 0xca, 0x3d, 0x6c, + 0xb4, 0xc5, 0xcc, 0x70, 0xb2, 0x91, 0x59, 0x0d, 0x47, 0x20, 0xc8, 0x4f, 0x58, 0xe0, 0x01, 0xe2, + 0x16, 0x38, 0xc4, 0x6f, 0x3b, 0x0f, 0x65, 0x46, 0xbe, 0x7e, 0x2d, 0x7b, 0x82, 0xf9, 0x40, 0xb5, + 0x1d, 0x73, 0xf8, 0xeb, 0x26, 0xc7, 0x87, 0x97, 0x25, 0x54, 0xb1, 0x28, 0xaa, 0x98, 0x9d, 0xa5, + 0x64, 0x6d, 0x7a, 0xd4, 0x10, 0x81, 0x44, 0xef, 0x49, 0xd6, 0xae, 0x2e, 0xdd, 0x76, 0x5c, 0x2f, + 0xa7, 0x1c, 0xc9, 0x09, 0x69, 0x9a, 0x83, 0xcf, 0x29, 0x39, 0xb9, 0xe9, 0x4c, 0xff, 0x43, 0xab + }; + +// internal static readonly short[] rc2Ekb = +// { +// 0x5d, 0xbe, 0x9b, 0x8b, 0x11, 0x99, 0x6e, 0x4d, 0x59, 0xf3, 0x85, 0xa6, 0x3f, 0xb7, 0x83, 0xc5, +// 0xe4, 0x73, 0x6b, 0x3a, 0x68, 0x5a, 0xc0, 0x47, 0xa0, 0x64, 0x34, 0x0c, 0xf1, 0xd0, 0x52, 0xa5, +// 0xb9, 0x1e, 0x96, 0x43, 0x41, 0xd8, 0xd4, 0x2c, 0xdb, 0xf8, 0x07, 0x77, 0x2a, 0xca, 0xeb, 0xef, +// 0x10, 0x1c, 0x16, 0x0d, 0x38, 0x72, 0x2f, 0x89, 0xc1, 0xf9, 0x80, 0xc4, 0x6d, 0xae, 0x30, 0x3d, +// 0xce, 0x20, 0x63, 0xfe, 0xe6, 0x1a, 0xc7, 0xb8, 0x50, 0xe8, 0x24, 0x17, 0xfc, 0x25, 0x6f, 0xbb, +// 0x6a, 0xa3, 0x44, 0x53, 0xd9, 0xa2, 0x01, 0xab, 0xbc, 0xb6, 0x1f, 0x98, 0xee, 0x9a, 0xa7, 0x2d, +// 0x4f, 0x9e, 0x8e, 0xac, 0xe0, 0xc6, 0x49, 0x46, 0x29, 0xf4, 0x94, 0x8a, 0xaf, 0xe1, 0x5b, 0xc3, +// 0xb3, 0x7b, 0x57, 0xd1, 0x7c, 0x9c, 0xed, 0x87, 0x40, 0x8c, 0xe2, 0xcb, 0x93, 0x14, 0xc9, 0x61, +// 0x2e, 0xe5, 0xcc, 0xf6, 0x5e, 0xa8, 0x5c, 0xd6, 0x75, 0x8d, 0x62, 0x95, 0x58, 0x69, 0x76, 0xa1, +// 0x4a, 0xb5, 0x55, 0x09, 0x78, 0x33, 0x82, 0xd7, 0xdd, 0x79, 0xf5, 0x1b, 0x0b, 0xde, 0x26, 0x21, +// 0x28, 0x74, 0x04, 0x97, 0x56, 0xdf, 0x3c, 0xf0, 0x37, 0x39, 0xdc, 0xff, 0x06, 0xa4, 0xea, 0x42, +// 0x08, 0xda, 0xb4, 0x71, 0xb0, 0xcf, 0x12, 0x7a, 0x4e, 0xfa, 0x6c, 0x1d, 0x84, 0x00, 0xc8, 0x7f, +// 0x91, 0x45, 0xaa, 0x2b, 0xc2, 0xb1, 0x8f, 0xd5, 0xba, 0xf2, 0xad, 0x19, 0xb2, 0x67, 0x36, 0xf7, +// 0x0f, 0x0a, 0x92, 0x7d, 0xe3, 0x9d, 0xe9, 0x90, 0x3e, 0x23, 0x27, 0x66, 0x13, 0xec, 0x81, 0x15, +// 0xbd, 0x22, 0xbf, 0x9f, 0x7e, 0xa9, 0x51, 0x4b, 0x4c, 0xfb, 0x02, 0xd3, 0x70, 0x86, 0x31, 0xe7, +// 0x3b, 0x05, 0x03, 0x54, 0x60, 0x48, 0x65, 0x18, 0xd2, 0xcd, 0x5f, 0x32, 0x88, 0x0e, 0x35, 0xfd +// }; + + + // TODO Create named constants for all of these + public static readonly string DesEde3Cbc = PkcsObjectIdentifiers.DesEde3Cbc.Id; + public static readonly string RC2Cbc = PkcsObjectIdentifiers.RC2Cbc.Id; + public const string IdeaCbc = "1.3.6.1.4.1.188.7.1.1.2"; + public const string Cast5Cbc = "1.2.840.113533.7.66.10"; + public static readonly string Aes128Cbc = NistObjectIdentifiers.IdAes128Cbc.Id; + public static readonly string Aes192Cbc = NistObjectIdentifiers.IdAes192Cbc.Id; + public static readonly string Aes256Cbc = NistObjectIdentifiers.IdAes256Cbc.Id; + public static readonly string Camellia128Cbc = NttObjectIdentifiers.IdCamellia128Cbc.Id; + public static readonly string Camellia192Cbc = NttObjectIdentifiers.IdCamellia192Cbc.Id; + public static readonly string Camellia256Cbc = NttObjectIdentifiers.IdCamellia256Cbc.Id; + public static readonly string SeedCbc = KisaObjectIdentifiers.IdSeedCbc.Id; + + public static readonly string DesEde3Wrap = PkcsObjectIdentifiers.IdAlgCms3DesWrap.Id; + public static readonly string Aes128Wrap = NistObjectIdentifiers.IdAes128Wrap.Id; + public static readonly string Aes192Wrap = NistObjectIdentifiers.IdAes192Wrap.Id; + public static readonly string Aes256Wrap = NistObjectIdentifiers.IdAes256Wrap.Id; + public static readonly string Camellia128Wrap = NttObjectIdentifiers.IdCamellia128Wrap.Id; + public static readonly string Camellia192Wrap = NttObjectIdentifiers.IdCamellia192Wrap.Id; + public static readonly string Camellia256Wrap = NttObjectIdentifiers.IdCamellia256Wrap.Id; + public static readonly string SeedWrap = KisaObjectIdentifiers.IdNpkiAppCmsSeedWrap.Id; + + public static readonly string ECDHSha1Kdf = X9ObjectIdentifiers.DHSinglePassStdDHSha1KdfScheme.Id; + public static readonly string ECMqvSha1Kdf = X9ObjectIdentifiers.MqvSinglePassSha1KdfScheme.Id; + + internal readonly IList recipientInfoGenerators = Platform.CreateArrayList(); + internal readonly SecureRandom rand; + + internal CmsAttributeTableGenerator unprotectedAttributeGenerator = null; + + public CmsEnvelopedGenerator() + : this(new SecureRandom()) + { + } + + /// <summary>Constructor allowing specific source of randomness</summary> + /// <param name="rand">Instance of <c>SecureRandom</c> to use.</param> + public CmsEnvelopedGenerator( + SecureRandom rand) + { + this.rand = rand; + } + + public CmsAttributeTableGenerator UnprotectedAttributeGenerator + { + get { return this.unprotectedAttributeGenerator; } + set { this.unprotectedAttributeGenerator = value; } + } + + /** + * add a recipient. + * + * @param cert recipient's public key certificate + * @exception ArgumentException if there is a problem with the certificate + */ + public void AddKeyTransRecipient( + X509Certificate cert) + { + KeyTransRecipientInfoGenerator ktrig = new KeyTransRecipientInfoGenerator(); + ktrig.RecipientCert = cert; + + recipientInfoGenerators.Add(ktrig); + } + + /** + * add a recipient + * + * @param key the public key used by the recipient + * @param subKeyId the identifier for the recipient's public key + * @exception ArgumentException if there is a problem with the key + */ + public void AddKeyTransRecipient( + AsymmetricKeyParameter pubKey, + byte[] subKeyId) + { + KeyTransRecipientInfoGenerator ktrig = new KeyTransRecipientInfoGenerator(); + ktrig.RecipientPublicKey = pubKey; + ktrig.SubjectKeyIdentifier = new DerOctetString(subKeyId); + + recipientInfoGenerators.Add(ktrig); + } + + /** + * add a KEK recipient. + * @param key the secret key to use for wrapping + * @param keyIdentifier the byte string that identifies the key + */ + public void AddKekRecipient( + string keyAlgorithm, // TODO Remove need for this parameter + KeyParameter key, + byte[] keyIdentifier) + { + AddKekRecipient(keyAlgorithm, key, new KekIdentifier(keyIdentifier, null, null)); + } + + /** + * add a KEK recipient. + * @param key the secret key to use for wrapping + * @param keyIdentifier the byte string that identifies the key + */ + public void AddKekRecipient( + string keyAlgorithm, // TODO Remove need for this parameter + KeyParameter key, + KekIdentifier kekIdentifier) + { + KekRecipientInfoGenerator kekrig = new KekRecipientInfoGenerator(); + kekrig.KekIdentifier = kekIdentifier; + kekrig.KeyEncryptionKeyOID = keyAlgorithm; + kekrig.KeyEncryptionKey = key; + + recipientInfoGenerators.Add(kekrig); + } + + public void AddPasswordRecipient( + CmsPbeKey pbeKey, + string kekAlgorithmOid) + { + Pbkdf2Params p = new Pbkdf2Params(pbeKey.Salt, pbeKey.IterationCount); + + PasswordRecipientInfoGenerator prig = new PasswordRecipientInfoGenerator(); + prig.KeyDerivationAlgorithm = new AlgorithmIdentifier(PkcsObjectIdentifiers.IdPbkdf2, p); + prig.KeyEncryptionKeyOID = kekAlgorithmOid; + prig.KeyEncryptionKey = pbeKey.GetEncoded(kekAlgorithmOid); + + recipientInfoGenerators.Add(prig); + } + + /** + * Add a key agreement based recipient. + * + * @param agreementAlgorithm key agreement algorithm to use. + * @param senderPrivateKey private key to initialise sender side of agreement with. + * @param senderPublicKey sender public key to include with message. + * @param recipientCert recipient's public key certificate. + * @param cekWrapAlgorithm OID for key wrapping algorithm to use. + * @exception SecurityUtilityException if the algorithm requested cannot be found + * @exception InvalidKeyException if the keys are inappropriate for the algorithm specified + */ + public void AddKeyAgreementRecipient( + string agreementAlgorithm, + AsymmetricKeyParameter senderPrivateKey, + AsymmetricKeyParameter senderPublicKey, + X509Certificate recipientCert, + string cekWrapAlgorithm) + { + IList recipientCerts = Platform.CreateArrayList(1); + recipientCerts.Add(recipientCert); + + AddKeyAgreementRecipients(agreementAlgorithm, senderPrivateKey, senderPublicKey, + recipientCerts, cekWrapAlgorithm); + } + + /** + * Add multiple key agreement based recipients (sharing a single KeyAgreeRecipientInfo structure). + * + * @param agreementAlgorithm key agreement algorithm to use. + * @param senderPrivateKey private key to initialise sender side of agreement with. + * @param senderPublicKey sender public key to include with message. + * @param recipientCerts recipients' public key certificates. + * @param cekWrapAlgorithm OID for key wrapping algorithm to use. + * @exception SecurityUtilityException if the algorithm requested cannot be found + * @exception InvalidKeyException if the keys are inappropriate for the algorithm specified + */ + public void AddKeyAgreementRecipients( + string agreementAlgorithm, + AsymmetricKeyParameter senderPrivateKey, + AsymmetricKeyParameter senderPublicKey, + ICollection recipientCerts, + string cekWrapAlgorithm) + { + if (!senderPrivateKey.IsPrivate) + throw new ArgumentException("Expected private key", "senderPrivateKey"); + if (senderPublicKey.IsPrivate) + throw new ArgumentException("Expected public key", "senderPublicKey"); + + /* TODO + * "a recipient X.509 version 3 certificate that contains a key usage extension MUST + * assert the keyAgreement bit." + */ + + KeyAgreeRecipientInfoGenerator karig = new KeyAgreeRecipientInfoGenerator(); + karig.KeyAgreementOID = new DerObjectIdentifier(agreementAlgorithm); + karig.KeyEncryptionOID = new DerObjectIdentifier(cekWrapAlgorithm); + karig.RecipientCerts = recipientCerts; + karig.SenderKeyPair = new AsymmetricCipherKeyPair(senderPublicKey, senderPrivateKey); + + recipientInfoGenerators.Add(karig); + } + + protected internal virtual AlgorithmIdentifier GetAlgorithmIdentifier( + string encryptionOid, + KeyParameter encKey, + Asn1Encodable asn1Params, + out ICipherParameters cipherParameters) + { + Asn1Object asn1Object; + if (asn1Params != null) + { + asn1Object = asn1Params.ToAsn1Object(); + cipherParameters = ParameterUtilities.GetCipherParameters( + encryptionOid, encKey, asn1Object); + } + else + { + asn1Object = DerNull.Instance; + cipherParameters = encKey; + } + + return new AlgorithmIdentifier( + new DerObjectIdentifier(encryptionOid), + asn1Object); + } + + protected internal virtual Asn1Encodable GenerateAsn1Parameters( + string encryptionOid, + byte[] encKeyBytes) + { + Asn1Encodable asn1Params = null; + + try + { + if (encryptionOid.Equals(RC2Cbc)) + { + byte[] iv = new byte[8]; + rand.NextBytes(iv); + + // TODO Is this detailed repeat of Java version really necessary? + int effKeyBits = encKeyBytes.Length * 8; + int parameterVersion; + + if (effKeyBits < 256) + { + parameterVersion = rc2Table[effKeyBits]; + } + else + { + parameterVersion = effKeyBits; + } + + asn1Params = new RC2CbcParameter(parameterVersion, iv); + } + else + { + asn1Params = ParameterUtilities.GenerateParameters(encryptionOid, rand); + } + } + catch (SecurityUtilityException) + { + // No problem... no parameters generated + } + + return asn1Params; + } + } +} diff --git a/Crypto/src/cms/CMSEnvelopedHelper.cs b/Crypto/src/cms/CMSEnvelopedHelper.cs new file mode 100644 index 000000000..fe2b14cd9 --- /dev/null +++ b/Crypto/src/cms/CMSEnvelopedHelper.cs @@ -0,0 +1,311 @@ +using System; +using System.Collections; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.IO; +using Org.BouncyCastle.Crypto.Parameters; +using Org.BouncyCastle.Security; +using Org.BouncyCastle.Utilities; +using Org.BouncyCastle.Utilities.IO; + +namespace Org.BouncyCastle.Cms +{ + class CmsEnvelopedHelper + { + internal static readonly CmsEnvelopedHelper Instance = new CmsEnvelopedHelper(); + + private static readonly IDictionary KeySizes = Platform.CreateHashtable(); + private static readonly IDictionary BaseCipherNames = Platform.CreateHashtable(); + + static CmsEnvelopedHelper() + { + KeySizes.Add(CmsEnvelopedGenerator.DesEde3Cbc, 192); + KeySizes.Add(CmsEnvelopedGenerator.Aes128Cbc, 128); + KeySizes.Add(CmsEnvelopedGenerator.Aes192Cbc, 192); + KeySizes.Add(CmsEnvelopedGenerator.Aes256Cbc, 256); + + BaseCipherNames.Add(CmsEnvelopedGenerator.DesEde3Cbc, "DESEDE"); + BaseCipherNames.Add(CmsEnvelopedGenerator.Aes128Cbc, "AES"); + BaseCipherNames.Add(CmsEnvelopedGenerator.Aes192Cbc, "AES"); + BaseCipherNames.Add(CmsEnvelopedGenerator.Aes256Cbc, "AES"); + } + + private string GetAsymmetricEncryptionAlgName( + string encryptionAlgOid) + { + if (Asn1.Pkcs.PkcsObjectIdentifiers.RsaEncryption.Id.Equals(encryptionAlgOid)) + { + return "RSA/ECB/PKCS1Padding"; + } + + return encryptionAlgOid; + } + + internal IBufferedCipher CreateAsymmetricCipher( + string encryptionOid) + { + string asymName = GetAsymmetricEncryptionAlgName(encryptionOid); + if (!asymName.Equals(encryptionOid)) + { + try + { + return CipherUtilities.GetCipher(asymName); + } + catch (SecurityUtilityException) + { + // Ignore + } + } + return CipherUtilities.GetCipher(encryptionOid); + } + + internal IWrapper CreateWrapper( + string encryptionOid) + { + try + { + return WrapperUtilities.GetWrapper(encryptionOid); + } + catch (SecurityUtilityException) + { + return WrapperUtilities.GetWrapper(GetAsymmetricEncryptionAlgName(encryptionOid)); + } + } + + internal string GetRfc3211WrapperName( + string oid) + { + if (oid == null) + throw new ArgumentNullException("oid"); + + string alg = (string) BaseCipherNames[oid]; + + if (alg == null) + throw new ArgumentException("no name for " + oid, "oid"); + + return alg + "RFC3211Wrap"; + } + + internal int GetKeySize( + string oid) + { + if (!KeySizes.Contains(oid)) + { + throw new ArgumentException("no keysize for " + oid, "oid"); + } + + return (int) KeySizes[oid]; + } + + internal static RecipientInformationStore BuildRecipientInformationStore( + Asn1Set recipientInfos, CmsSecureReadable secureReadable) + { + IList infos = Platform.CreateArrayList(); + for (int i = 0; i != recipientInfos.Count; i++) + { + RecipientInfo info = RecipientInfo.GetInstance(recipientInfos[i]); + + ReadRecipientInfo(infos, info, secureReadable); + } + return new RecipientInformationStore(infos); + } + + private static void ReadRecipientInfo( + IList infos, RecipientInfo info, CmsSecureReadable secureReadable) + { + Asn1Encodable recipInfo = info.Info; + if (recipInfo is KeyTransRecipientInfo) + { + infos.Add(new KeyTransRecipientInformation((KeyTransRecipientInfo)recipInfo, secureReadable)); + } + else if (recipInfo is KekRecipientInfo) + { + infos.Add(new KekRecipientInformation((KekRecipientInfo)recipInfo, secureReadable)); + } + else if (recipInfo is KeyAgreeRecipientInfo) + { + KeyAgreeRecipientInformation.ReadRecipientInfo(infos, (KeyAgreeRecipientInfo)recipInfo, secureReadable); + } + else if (recipInfo is PasswordRecipientInfo) + { + infos.Add(new PasswordRecipientInformation((PasswordRecipientInfo)recipInfo, secureReadable)); + } + } + + internal class CmsAuthenticatedSecureReadable : CmsSecureReadable + { + private AlgorithmIdentifier algorithm; + private IMac mac; + private CmsReadable readable; + + internal CmsAuthenticatedSecureReadable(AlgorithmIdentifier algorithm, CmsReadable readable) + { + this.algorithm = algorithm; + this.readable = readable; + } + + public AlgorithmIdentifier Algorithm + { + get { return this.algorithm; } + } + + public object CryptoObject + { + get { return this.mac; } + } + + public CmsReadable GetReadable(KeyParameter sKey) + { + string macAlg = this.algorithm.ObjectID.Id; +// Asn1Object sParams = this.algorithm.Parameters.ToAsn1Object(); + + try + { + this.mac = MacUtilities.GetMac(macAlg); + + // FIXME Support for MAC algorithm parameters similar to cipher parameters +// ASN1Object sParams = (ASN1Object)macAlg.getParameters(); +// +// if (sParams != null && !(sParams instanceof ASN1Null)) +// { +// AlgorithmParameters params = CMSEnvelopedHelper.INSTANCE.createAlgorithmParameters(macAlg.getObjectId().getId(), provider); +// +// params.init(sParams.getEncoded(), "ASN.1"); +// +// mac.init(sKey, params.getParameterSpec(IvParameterSpec.class)); +// } +// else + { + mac.Init(sKey); + } + +// Asn1Object asn1Params = asn1Enc == null ? null : asn1Enc.ToAsn1Object(); +// +// ICipherParameters cipherParameters = sKey; +// +// if (asn1Params != null && !(asn1Params is Asn1Null)) +// { +// cipherParameters = ParameterUtilities.GetCipherParameters( +// macAlg.ObjectID, cipherParameters, asn1Params); +// } +// else +// { +// string alg = macAlg.ObjectID.Id; +// if (alg.Equals(CmsEnvelopedDataGenerator.DesEde3Cbc) +// || alg.Equals(CmsEnvelopedDataGenerator.IdeaCbc) +// || alg.Equals(CmsEnvelopedDataGenerator.Cast5Cbc)) +// { +// cipherParameters = new ParametersWithIV(cipherParameters, new byte[8]); +// } +// } +// +// mac.Init(cipherParameters); + } + catch (SecurityUtilityException e) + { + throw new CmsException("couldn't create cipher.", e); + } + catch (InvalidKeyException e) + { + throw new CmsException("key invalid in message.", e); + } + catch (IOException e) + { + throw new CmsException("error decoding algorithm parameters.", e); + } + + try + { + return new CmsProcessableInputStream( + new TeeInputStream( + readable.GetInputStream(), + new MacOutputStream(this.mac))); + } + catch (IOException e) + { + throw new CmsException("error reading content.", e); + } + } + } + + internal class CmsEnvelopedSecureReadable : CmsSecureReadable + { + private AlgorithmIdentifier algorithm; + private IBufferedCipher cipher; + private CmsReadable readable; + + internal CmsEnvelopedSecureReadable(AlgorithmIdentifier algorithm, CmsReadable readable) + { + this.algorithm = algorithm; + this.readable = readable; + } + + public AlgorithmIdentifier Algorithm + { + get { return this.algorithm; } + } + + public object CryptoObject + { + get { return this.cipher; } + } + + public CmsReadable GetReadable(KeyParameter sKey) + { + try + { + this.cipher = CipherUtilities.GetCipher(this.algorithm.ObjectID); + + Asn1Encodable asn1Enc = this.algorithm.Parameters; + Asn1Object asn1Params = asn1Enc == null ? null : asn1Enc.ToAsn1Object(); + + ICipherParameters cipherParameters = sKey; + + if (asn1Params != null && !(asn1Params is Asn1Null)) + { + cipherParameters = ParameterUtilities.GetCipherParameters( + this.algorithm.ObjectID, cipherParameters, asn1Params); + } + else + { + string alg = this.algorithm.ObjectID.Id; + if (alg.Equals(CmsEnvelopedDataGenerator.DesEde3Cbc) + || alg.Equals(CmsEnvelopedDataGenerator.IdeaCbc) + || alg.Equals(CmsEnvelopedDataGenerator.Cast5Cbc)) + { + cipherParameters = new ParametersWithIV(cipherParameters, new byte[8]); + } + } + + cipher.Init(false, cipherParameters); + } + catch (SecurityUtilityException e) + { + throw new CmsException("couldn't create cipher.", e); + } + catch (InvalidKeyException e) + { + throw new CmsException("key invalid in message.", e); + } + catch (IOException e) + { + throw new CmsException("error decoding algorithm parameters.", e); + } + + try + { + return new CmsProcessableInputStream( + new CipherStream(readable.GetInputStream(), cipher, null)); + } + catch (IOException e) + { + throw new CmsException("error reading content.", e); + } + } + } + } +} \ No newline at end of file diff --git a/Crypto/src/cms/CMSException.cs b/Crypto/src/cms/CMSException.cs new file mode 100644 index 000000000..1d1cd82e3 --- /dev/null +++ b/Crypto/src/cms/CMSException.cs @@ -0,0 +1,25 @@ +using System; + +namespace Org.BouncyCastle.Cms +{ + public class CmsException + : Exception + { + public CmsException() + { + } + + public CmsException( + string msg) + : base(msg) + { + } + + public CmsException( + string msg, + Exception e) + : base(msg, e) + { + } + } +} diff --git a/Crypto/src/cms/CMSPBEKey.cs b/Crypto/src/cms/CMSPBEKey.cs new file mode 100644 index 000000000..cb1e54c36 --- /dev/null +++ b/Crypto/src/cms/CMSPBEKey.cs @@ -0,0 +1,109 @@ +using System; + +using Org.BouncyCastle.Asn1.Pkcs; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.Parameters; +using Org.BouncyCastle.Utilities; + +//import javax.crypto.interfaces.PBEKey; + +namespace Org.BouncyCastle.Cms +{ + public abstract class CmsPbeKey + // TODO Create an equivalent interface somewhere? + // : PBEKey + : ICipherParameters + { + internal readonly char[] password; + internal readonly byte[] salt; + internal readonly int iterationCount; + + [Obsolete("Use version taking 'char[]' instead")] + public CmsPbeKey( + string password, + byte[] salt, + int iterationCount) + : this(password.ToCharArray(), salt, iterationCount) + { + } + + [Obsolete("Use version taking 'char[]' instead")] + public CmsPbeKey( + string password, + AlgorithmIdentifier keyDerivationAlgorithm) + : this(password.ToCharArray(), keyDerivationAlgorithm) + { + } + + public CmsPbeKey( + char[] password, + byte[] salt, + int iterationCount) + { + this.password = (char[])password.Clone(); + this.salt = Arrays.Clone(salt); + this.iterationCount = iterationCount; + } + + public CmsPbeKey( + char[] password, + AlgorithmIdentifier keyDerivationAlgorithm) + { + if (!keyDerivationAlgorithm.ObjectID.Equals(PkcsObjectIdentifiers.IdPbkdf2)) + throw new ArgumentException("Unsupported key derivation algorithm: " + + keyDerivationAlgorithm.ObjectID); + + Pbkdf2Params kdfParams = Pbkdf2Params.GetInstance( + keyDerivationAlgorithm.Parameters.ToAsn1Object()); + + this.password = (char[])password.Clone(); + this.salt = kdfParams.GetSalt(); + this.iterationCount = kdfParams.IterationCount.IntValue; + } + + ~CmsPbeKey() + { + Array.Clear(this.password, 0, this.password.Length); + } + + [Obsolete("Will be removed")] + public string Password + { + get { return new string(password); } + } + + public byte[] Salt + { + get { return Arrays.Clone(salt); } + } + + [Obsolete("Use 'Salt' property instead")] + public byte[] GetSalt() + { + return Salt; + } + + public int IterationCount + { + get { return iterationCount; } + } + + public string Algorithm + { + get { return "PKCS5S2"; } + } + + public string Format + { + get { return "RAW"; } + } + + public byte[] GetEncoded() + { + return null; + } + + internal abstract KeyParameter GetEncoded(string algorithmOid); + } +} diff --git a/Crypto/src/cms/CMSProcessable.cs b/Crypto/src/cms/CMSProcessable.cs new file mode 100644 index 000000000..41018d12b --- /dev/null +++ b/Crypto/src/cms/CMSProcessable.cs @@ -0,0 +1,19 @@ +using System; +using System.IO; + +namespace Org.BouncyCastle.Cms +{ + public interface CmsProcessable + { + /// <summary> + /// Generic routine to copy out the data we want processed. + /// </summary> + /// <remarks> + /// This routine may be called multiple times. + /// </remarks> + void Write(Stream outStream); + + [Obsolete] + object GetContent(); + } +} diff --git a/Crypto/src/cms/CMSProcessableByteArray.cs b/Crypto/src/cms/CMSProcessableByteArray.cs new file mode 100644 index 000000000..4bee4f8bd --- /dev/null +++ b/Crypto/src/cms/CMSProcessableByteArray.cs @@ -0,0 +1,36 @@ +using System; +using System.IO; + +namespace Org.BouncyCastle.Cms +{ + /** + * a holding class for a byte array of data to be processed. + */ + public class CmsProcessableByteArray + : CmsProcessable, CmsReadable + { + private readonly byte[] bytes; + + public CmsProcessableByteArray( + byte[] bytes) + { + this.bytes = bytes; + } + + public Stream GetInputStream() + { + return new MemoryStream(bytes, false); + } + + public virtual void Write(Stream zOut) + { + zOut.Write(bytes, 0, bytes.Length); + } + + /// <returns>A clone of the byte array</returns> + public virtual object GetContent() + { + return bytes.Clone(); + } + } +} diff --git a/Crypto/src/cms/CMSProcessableFile.cs b/Crypto/src/cms/CMSProcessableFile.cs new file mode 100644 index 000000000..548dc8efb --- /dev/null +++ b/Crypto/src/cms/CMSProcessableFile.cs @@ -0,0 +1,57 @@ +#if !PORTABLE + +using System; +using System.IO; + +using Org.BouncyCastle.Utilities.IO; + +namespace Org.BouncyCastle.Cms +{ + /** + * a holding class for a file of data to be processed. + */ + public class CmsProcessableFile + : CmsProcessable, CmsReadable + { + private const int DefaultBufSize = 32 * 1024; + + private readonly FileInfo _file; + private readonly int _bufSize; + + public CmsProcessableFile( + FileInfo file) + : this(file, DefaultBufSize) + { + } + + public CmsProcessableFile( + FileInfo file, + int bufSize) + { + _file = file; + _bufSize = bufSize; + } + + public virtual Stream GetInputStream() + { + return new FileStream( + _file.FullName, FileMode.Open, FileAccess.Read, FileShare.Read, _bufSize); + } + + public virtual void Write( + Stream zOut) + { + Stream inStr = GetInputStream(); + Streams.PipeAll(inStr, zOut); + inStr.Close(); + } + + /// <returns>The file handle</returns> + [Obsolete] + public virtual object GetContent() + { + return _file; + } + } +} +#endif \ No newline at end of file diff --git a/Crypto/src/cms/CMSProcessableInputStream.cs b/Crypto/src/cms/CMSProcessableInputStream.cs new file mode 100644 index 000000000..d10d059c6 --- /dev/null +++ b/Crypto/src/cms/CMSProcessableInputStream.cs @@ -0,0 +1,52 @@ +using System; +using System.IO; + +using Org.BouncyCastle.Utilities.IO; + +namespace Org.BouncyCastle.Cms +{ + public class CmsProcessableInputStream + : CmsProcessable, CmsReadable + { + private Stream input; + private bool used = false; + + public CmsProcessableInputStream( + Stream input) + { + this.input = input; + } + + public Stream GetInputStream() + { + CheckSingleUsage(); + + return input; + } + + public void Write(Stream output) + { + CheckSingleUsage(); + + Streams.PipeAll(input, output); + input.Dispose(); + } + + [Obsolete] + public object GetContent() + { + return GetInputStream(); + } + + private void CheckSingleUsage() + { + lock (this) + { + if (used) + throw new InvalidOperationException("CmsProcessableInputStream can only be used once"); + + used = true; + } + } + } +} diff --git a/Crypto/src/cms/CMSReadable.cs b/Crypto/src/cms/CMSReadable.cs new file mode 100644 index 000000000..9507b920c --- /dev/null +++ b/Crypto/src/cms/CMSReadable.cs @@ -0,0 +1,10 @@ +using System; +using System.IO; + +namespace Org.BouncyCastle.Cms +{ + internal interface CmsReadable + { + Stream GetInputStream(); + } +} diff --git a/Crypto/src/cms/CMSSecureReadable.cs b/Crypto/src/cms/CMSSecureReadable.cs new file mode 100644 index 000000000..5ceac24fd --- /dev/null +++ b/Crypto/src/cms/CMSSecureReadable.cs @@ -0,0 +1,14 @@ +using System; + +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto.Parameters; + +namespace Org.BouncyCastle.Cms +{ + internal interface CmsSecureReadable + { + AlgorithmIdentifier Algorithm { get; } + object CryptoObject { get; } + CmsReadable GetReadable(KeyParameter key); + } +} diff --git a/Crypto/src/cms/CMSSignedData.cs b/Crypto/src/cms/CMSSignedData.cs new file mode 100644 index 000000000..81c87a426 --- /dev/null +++ b/Crypto/src/cms/CMSSignedData.cs @@ -0,0 +1,425 @@ +using System; +using System.Collections; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Security.Certificates; +using Org.BouncyCastle.Utilities; +using Org.BouncyCastle.X509; +using Org.BouncyCastle.X509.Store; + +namespace Org.BouncyCastle.Cms +{ + /** + * general class for handling a pkcs7-signature message. + * + * A simple example of usage - note, in the example below the validity of + * the certificate isn't verified, just the fact that one of the certs + * matches the given signer... + * + * <pre> + * IX509Store certs = s.GetCertificates(); + * SignerInformationStore signers = s.GetSignerInfos(); + * + * foreach (SignerInformation signer in signers.GetSigners()) + * { + * ArrayList certList = new ArrayList(certs.GetMatches(signer.SignerID)); + * X509Certificate cert = (X509Certificate) certList[0]; + * + * if (signer.Verify(cert.GetPublicKey())) + * { + * verified++; + * } + * } + * </pre> + */ + public class CmsSignedData + { + private static readonly CmsSignedHelper Helper = CmsSignedHelper.Instance; + + private readonly CmsProcessable signedContent; + private SignedData signedData; + private ContentInfo contentInfo; + private SignerInformationStore signerInfoStore; + private IX509Store attrCertStore; + private IX509Store certificateStore; + private IX509Store crlStore; + private IDictionary hashes; + + private CmsSignedData( + CmsSignedData c) + { + this.signedData = c.signedData; + this.contentInfo = c.contentInfo; + this.signedContent = c.signedContent; + this.signerInfoStore = c.signerInfoStore; + } + + public CmsSignedData( + byte[] sigBlock) + : this(CmsUtilities.ReadContentInfo(new MemoryStream(sigBlock, false))) + { + } + + public CmsSignedData( + CmsProcessable signedContent, + byte[] sigBlock) + : this(signedContent, CmsUtilities.ReadContentInfo(new MemoryStream(sigBlock, false))) + { + } + + /** + * Content with detached signature, digests precomputed + * + * @param hashes a map of precomputed digests for content indexed by name of hash. + * @param sigBlock the signature object. + */ + public CmsSignedData( + IDictionary hashes, + byte[] sigBlock) + : this(hashes, CmsUtilities.ReadContentInfo(sigBlock)) + { + } + + /** + * base constructor - content with detached signature. + * + * @param signedContent the content that was signed. + * @param sigData the signature object. + */ + public CmsSignedData( + CmsProcessable signedContent, + Stream sigData) + : this(signedContent, CmsUtilities.ReadContentInfo(sigData)) + { + } + + /** + * base constructor - with encapsulated content + */ + public CmsSignedData( + Stream sigData) + : this(CmsUtilities.ReadContentInfo(sigData)) + { + } + + public CmsSignedData( + CmsProcessable signedContent, + ContentInfo sigData) + { + this.signedContent = signedContent; + this.contentInfo = sigData; + this.signedData = SignedData.GetInstance(contentInfo.Content); + } + + public CmsSignedData( + IDictionary hashes, + ContentInfo sigData) + { + this.hashes = hashes; + this.contentInfo = sigData; + this.signedData = SignedData.GetInstance(contentInfo.Content); + } + + public CmsSignedData( + ContentInfo sigData) + { + this.contentInfo = sigData; + this.signedData = SignedData.GetInstance(contentInfo.Content); + + // + // this can happen if the signed message is sent simply to send a + // certificate chain. + // + if (signedData.EncapContentInfo.Content != null) + { + this.signedContent = new CmsProcessableByteArray( + ((Asn1OctetString)(signedData.EncapContentInfo.Content)).GetOctets()); + } +// else +// { +// this.signedContent = null; +// } + } + + /// <summary>Return the version number for this object.</summary> + public int Version + { + get { return signedData.Version.Value.IntValue; } + } + + /** + * return the collection of signers that are associated with the + * signatures for the message. + */ + public SignerInformationStore GetSignerInfos() + { + if (signerInfoStore == null) + { + IList signerInfos = Platform.CreateArrayList(); + Asn1Set s = signedData.SignerInfos; + + foreach (object obj in s) + { + SignerInfo info = SignerInfo.GetInstance(obj); + DerObjectIdentifier contentType = signedData.EncapContentInfo.ContentType; + + if (hashes == null) + { + signerInfos.Add(new SignerInformation(info, contentType, signedContent, null)); + } + else + { + byte[] hash = (byte[]) hashes[info.DigestAlgorithm.ObjectID.Id]; + + signerInfos.Add(new SignerInformation(info, contentType, null, new BaseDigestCalculator(hash))); + } + } + + signerInfoStore = new SignerInformationStore(signerInfos); + } + + return signerInfoStore; + } + + /** + * return a X509Store containing the attribute certificates, if any, contained + * in this message. + * + * @param type type of store to create + * @return a store of attribute certificates + * @exception NoSuchStoreException if the store type isn't available. + * @exception CmsException if a general exception prevents creation of the X509Store + */ + public IX509Store GetAttributeCertificates( + string type) + { + if (attrCertStore == null) + { + attrCertStore = Helper.CreateAttributeStore(type, signedData.Certificates); + } + + return attrCertStore; + } + + /** + * return a X509Store containing the public key certificates, if any, contained + * in this message. + * + * @param type type of store to create + * @return a store of public key certificates + * @exception NoSuchStoreException if the store type isn't available. + * @exception CmsException if a general exception prevents creation of the X509Store + */ + public IX509Store GetCertificates( + string type) + { + if (certificateStore == null) + { + certificateStore = Helper.CreateCertificateStore(type, signedData.Certificates); + } + + return certificateStore; + } + + /** + * return a X509Store containing CRLs, if any, contained + * in this message. + * + * @param type type of store to create + * @return a store of CRLs + * @exception NoSuchStoreException if the store type isn't available. + * @exception CmsException if a general exception prevents creation of the X509Store + */ + public IX509Store GetCrls( + string type) + { + if (crlStore == null) + { + crlStore = Helper.CreateCrlStore(type, signedData.CRLs); + } + + return crlStore; + } + + [Obsolete("Use 'SignedContentType' property instead.")] + public string SignedContentTypeOid + { + get { return signedData.EncapContentInfo.ContentType.Id; } + } + + /// <summary> + /// Return the <c>DerObjectIdentifier</c> associated with the encapsulated + /// content info structure carried in the signed data. + /// </summary> + public DerObjectIdentifier SignedContentType + { + get { return signedData.EncapContentInfo.ContentType; } + } + + public CmsProcessable SignedContent + { + get { return signedContent; } + } + + /** + * return the ContentInfo + */ + public ContentInfo ContentInfo + { + get { return contentInfo; } + } + + /** + * return the ASN.1 encoded representation of this object. + */ + public byte[] GetEncoded() + { + return contentInfo.GetEncoded(); + } + + /** + * Replace the signerinformation store associated with this + * CmsSignedData object with the new one passed in. You would + * probably only want to do this if you wanted to change the unsigned + * attributes associated with a signer, or perhaps delete one. + * + * @param signedData the signed data object to be used as a base. + * @param signerInformationStore the new signer information store to use. + * @return a new signed data object. + */ + public static CmsSignedData ReplaceSigners( + CmsSignedData signedData, + SignerInformationStore signerInformationStore) + { + // + // copy + // + CmsSignedData cms = new CmsSignedData(signedData); + + // + // replace the store + // + cms.signerInfoStore = signerInformationStore; + + // + // replace the signers in the SignedData object + // + Asn1EncodableVector digestAlgs = new Asn1EncodableVector(); + Asn1EncodableVector vec = new Asn1EncodableVector(); + + foreach (SignerInformation signer in signerInformationStore.GetSigners()) + { + digestAlgs.Add(Helper.FixAlgID(signer.DigestAlgorithmID)); + vec.Add(signer.ToSignerInfo()); + } + + Asn1Set digests = new DerSet(digestAlgs); + Asn1Set signers = new DerSet(vec); + Asn1Sequence sD = (Asn1Sequence)signedData.signedData.ToAsn1Object(); + + // + // signers are the last item in the sequence. + // + vec = new Asn1EncodableVector( + sD[0], // version + digests); + + for (int i = 2; i != sD.Count - 1; i++) + { + vec.Add(sD[i]); + } + + vec.Add(signers); + + cms.signedData = SignedData.GetInstance(new BerSequence(vec)); + + // + // replace the contentInfo with the new one + // + cms.contentInfo = new ContentInfo(cms.contentInfo.ContentType, cms.signedData); + + return cms; + } + + /** + * Replace the certificate and CRL information associated with this + * CmsSignedData object with the new one passed in. + * + * @param signedData the signed data object to be used as a base. + * @param x509Certs the new certificates to be used. + * @param x509Crls the new CRLs to be used. + * @return a new signed data object. + * @exception CmsException if there is an error processing the stores + */ + public static CmsSignedData ReplaceCertificatesAndCrls( + CmsSignedData signedData, + IX509Store x509Certs, + IX509Store x509Crls, + IX509Store x509AttrCerts) + { + if (x509AttrCerts != null) + throw Platform.CreateNotImplementedException("Currently can't replace attribute certificates"); + + // + // copy + // + CmsSignedData cms = new CmsSignedData(signedData); + + // + // replace the certs and crls in the SignedData object + // + Asn1Set certs = null; + try + { + Asn1Set asn1Set = CmsUtilities.CreateBerSetFromList( + CmsUtilities.GetCertificatesFromStore(x509Certs)); + + if (asn1Set.Count != 0) + { + certs = asn1Set; + } + } + catch (X509StoreException e) + { + throw new CmsException("error getting certificates from store", e); + } + + Asn1Set crls = null; + try + { + Asn1Set asn1Set = CmsUtilities.CreateBerSetFromList( + CmsUtilities.GetCrlsFromStore(x509Crls)); + + if (asn1Set.Count != 0) + { + crls = asn1Set; + } + } + catch (X509StoreException e) + { + throw new CmsException("error getting CRLs from store", e); + } + + // + // replace the CMS structure. + // + SignedData old = signedData.signedData; + cms.signedData = new SignedData( + old.DigestAlgorithms, + old.EncapContentInfo, + certs, + crls, + old.SignerInfos); + + // + // replace the contentInfo with the new one + // + cms.contentInfo = new ContentInfo(cms.contentInfo.ContentType, cms.signedData); + + return cms; + } + } +} diff --git a/Crypto/src/cms/CMSSignedDataGenerator.cs b/Crypto/src/cms/CMSSignedDataGenerator.cs new file mode 100644 index 000000000..5b68c785d --- /dev/null +++ b/Crypto/src/cms/CMSSignedDataGenerator.cs @@ -0,0 +1,551 @@ +using System; +using System.Collections; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.Parameters; +using Org.BouncyCastle.Security; +using Org.BouncyCastle.Security.Certificates; +using Org.BouncyCastle.Utilities; +using Org.BouncyCastle.X509; + +namespace Org.BouncyCastle.Cms +{ + /** + * general class for generating a pkcs7-signature message. + * <p> + * A simple example of usage. + * + * <pre> + * IX509Store certs... + * IX509Store crls... + * CmsSignedDataGenerator gen = new CmsSignedDataGenerator(); + * + * gen.AddSigner(privKey, cert, CmsSignedGenerator.DigestSha1); + * gen.AddCertificates(certs); + * gen.AddCrls(crls); + * + * CmsSignedData data = gen.Generate(content); + * </pre> + * </p> + */ + public class CmsSignedDataGenerator + : CmsSignedGenerator + { + private static readonly CmsSignedHelper Helper = CmsSignedHelper.Instance; + + private readonly IList signerInfs = Platform.CreateArrayList(); + + private class SignerInf + { + private readonly CmsSignedGenerator outer; + + private readonly AsymmetricKeyParameter key; + private readonly SignerIdentifier signerIdentifier; + private readonly string digestOID; + private readonly string encOID; + private readonly CmsAttributeTableGenerator sAttr; + private readonly CmsAttributeTableGenerator unsAttr; + private readonly Asn1.Cms.AttributeTable baseSignedTable; + + internal SignerInf( + CmsSignedGenerator outer, + AsymmetricKeyParameter key, + SignerIdentifier signerIdentifier, + string digestOID, + string encOID, + CmsAttributeTableGenerator sAttr, + CmsAttributeTableGenerator unsAttr, + Asn1.Cms.AttributeTable baseSignedTable) + { + this.outer = outer; + this.key = key; + this.signerIdentifier = signerIdentifier; + this.digestOID = digestOID; + this.encOID = encOID; + this.sAttr = sAttr; + this.unsAttr = unsAttr; + this.baseSignedTable = baseSignedTable; + } + + internal AlgorithmIdentifier DigestAlgorithmID + { + get { return new AlgorithmIdentifier(new DerObjectIdentifier(digestOID), DerNull.Instance); } + } + + internal CmsAttributeTableGenerator SignedAttributes + { + get { return sAttr; } + } + + internal CmsAttributeTableGenerator UnsignedAttributes + { + get { return unsAttr; } + } + + internal SignerInfo ToSignerInfo( + DerObjectIdentifier contentType, + CmsProcessable content, + SecureRandom random) + { + AlgorithmIdentifier digAlgId = DigestAlgorithmID; + string digestName = Helper.GetDigestAlgName(digestOID); + IDigest dig = Helper.GetDigestInstance(digestName); + + string signatureName = digestName + "with" + Helper.GetEncryptionAlgName(encOID); + ISigner sig = Helper.GetSignatureInstance(signatureName); + + // TODO Optimise the case where more than one signer with same digest + if (content != null) + { + content.Write(new DigOutputStream(dig)); + } + + byte[] hash = DigestUtilities.DoFinal(dig); + outer._digests.Add(digestOID, hash.Clone()); + + sig.Init(true, new ParametersWithRandom(key, random)); +#if NETCF_1_0 || NETCF_2_0 || SILVERLIGHT || PORTABLE + Stream sigStr = new SigOutputStream(sig); +#else + Stream sigStr = new BufferedStream(new SigOutputStream(sig)); +#endif + + Asn1Set signedAttr = null; + if (sAttr != null) + { + IDictionary parameters = outer.GetBaseParameters(contentType, digAlgId, hash); + +// Asn1.Cms.AttributeTable signed = sAttr.GetAttributes(Collections.unmodifiableMap(parameters)); + Asn1.Cms.AttributeTable signed = sAttr.GetAttributes(parameters); + + if (contentType == null) //counter signature + { + if (signed != null && signed[CmsAttributes.ContentType] != null) + { + IDictionary tmpSigned = signed.ToDictionary(); + tmpSigned.Remove(CmsAttributes.ContentType); + signed = new Asn1.Cms.AttributeTable(tmpSigned); + } + } + + // TODO Validate proposed signed attributes + + signedAttr = outer.GetAttributeSet(signed); + + // sig must be composed from the DER encoding. + new DerOutputStream(sigStr).WriteObject(signedAttr); + } + else if (content != null) + { + // TODO Use raw signature of the hash value instead + content.Write(sigStr); + } + + sigStr.Dispose(); + byte[] sigBytes = sig.GenerateSignature(); + + Asn1Set unsignedAttr = null; + if (unsAttr != null) + { + IDictionary baseParameters = outer.GetBaseParameters(contentType, digAlgId, hash); + baseParameters[CmsAttributeTableParameter.Signature] = sigBytes.Clone(); + +// Asn1.Cms.AttributeTable unsigned = unsAttr.GetAttributes(Collections.unmodifiableMap(baseParameters)); + Asn1.Cms.AttributeTable unsigned = unsAttr.GetAttributes(baseParameters); + + // TODO Validate proposed unsigned attributes + + unsignedAttr = outer.GetAttributeSet(unsigned); + } + + // TODO[RSAPSS] Need the ability to specify non-default parameters + Asn1Encodable sigX509Parameters = SignerUtilities.GetDefaultX509Parameters(signatureName); + AlgorithmIdentifier encAlgId = CmsSignedGenerator.GetEncAlgorithmIdentifier( + new DerObjectIdentifier(encOID), sigX509Parameters); + + return new SignerInfo(signerIdentifier, digAlgId, + signedAttr, encAlgId, new DerOctetString(sigBytes), unsignedAttr); + } + } + + public CmsSignedDataGenerator() + { + } + + /// <summary>Constructor allowing specific source of randomness</summary> + /// <param name="rand">Instance of <c>SecureRandom</c> to use.</param> + public CmsSignedDataGenerator( + SecureRandom rand) + : base(rand) + { + } + + /** + * add a signer - no attributes other than the default ones will be + * provided here. + * + * @param key signing key to use + * @param cert certificate containing corresponding public key + * @param digestOID digest algorithm OID + */ + public void AddSigner( + AsymmetricKeyParameter privateKey, + X509Certificate cert, + string digestOID) + { + AddSigner(privateKey, cert, GetEncOid(privateKey, digestOID), digestOID); + } + + /** + * add a signer, specifying the digest encryption algorithm to use - no attributes other than the default ones will be + * provided here. + * + * @param key signing key to use + * @param cert certificate containing corresponding public key + * @param encryptionOID digest encryption algorithm OID + * @param digestOID digest algorithm OID + */ + public void AddSigner( + AsymmetricKeyParameter privateKey, + X509Certificate cert, + string encryptionOID, + string digestOID) + { + doAddSigner(privateKey, GetSignerIdentifier(cert), encryptionOID, digestOID, + new DefaultSignedAttributeTableGenerator(), null, null); + } + + /** + * add a signer - no attributes other than the default ones will be + * provided here. + */ + public void AddSigner( + AsymmetricKeyParameter privateKey, + byte[] subjectKeyID, + string digestOID) + { + AddSigner(privateKey, subjectKeyID, GetEncOid(privateKey, digestOID), digestOID); + } + + /** + * add a signer, specifying the digest encryption algorithm to use - no attributes other than the default ones will be + * provided here. + */ + public void AddSigner( + AsymmetricKeyParameter privateKey, + byte[] subjectKeyID, + string encryptionOID, + string digestOID) + { + doAddSigner(privateKey, GetSignerIdentifier(subjectKeyID), encryptionOID, digestOID, + new DefaultSignedAttributeTableGenerator(), null, null); + } + + /** + * add a signer with extra signed/unsigned attributes. + * + * @param key signing key to use + * @param cert certificate containing corresponding public key + * @param digestOID digest algorithm OID + * @param signedAttr table of attributes to be included in signature + * @param unsignedAttr table of attributes to be included as unsigned + */ + public void AddSigner( + AsymmetricKeyParameter privateKey, + X509Certificate cert, + string digestOID, + Asn1.Cms.AttributeTable signedAttr, + Asn1.Cms.AttributeTable unsignedAttr) + { + AddSigner(privateKey, cert, GetEncOid(privateKey, digestOID), digestOID, + signedAttr, unsignedAttr); + } + + /** + * add a signer, specifying the digest encryption algorithm, with extra signed/unsigned attributes. + * + * @param key signing key to use + * @param cert certificate containing corresponding public key + * @param encryptionOID digest encryption algorithm OID + * @param digestOID digest algorithm OID + * @param signedAttr table of attributes to be included in signature + * @param unsignedAttr table of attributes to be included as unsigned + */ + public void AddSigner( + AsymmetricKeyParameter privateKey, + X509Certificate cert, + string encryptionOID, + string digestOID, + Asn1.Cms.AttributeTable signedAttr, + Asn1.Cms.AttributeTable unsignedAttr) + { + doAddSigner(privateKey, GetSignerIdentifier(cert), encryptionOID, digestOID, + new DefaultSignedAttributeTableGenerator(signedAttr), + new SimpleAttributeTableGenerator(unsignedAttr), + signedAttr); + } + + /** + * add a signer with extra signed/unsigned attributes. + * + * @param key signing key to use + * @param subjectKeyID subjectKeyID of corresponding public key + * @param digestOID digest algorithm OID + * @param signedAttr table of attributes to be included in signature + * @param unsignedAttr table of attributes to be included as unsigned + */ + public void AddSigner( + AsymmetricKeyParameter privateKey, + byte[] subjectKeyID, + string digestOID, + Asn1.Cms.AttributeTable signedAttr, + Asn1.Cms.AttributeTable unsignedAttr) + { + AddSigner(privateKey, subjectKeyID, GetEncOid(privateKey, digestOID), digestOID, + signedAttr, unsignedAttr); + } + + /** + * add a signer, specifying the digest encryption algorithm, with extra signed/unsigned attributes. + * + * @param key signing key to use + * @param subjectKeyID subjectKeyID of corresponding public key + * @param encryptionOID digest encryption algorithm OID + * @param digestOID digest algorithm OID + * @param signedAttr table of attributes to be included in signature + * @param unsignedAttr table of attributes to be included as unsigned + */ + public void AddSigner( + AsymmetricKeyParameter privateKey, + byte[] subjectKeyID, + string encryptionOID, + string digestOID, + Asn1.Cms.AttributeTable signedAttr, + Asn1.Cms.AttributeTable unsignedAttr) + { + doAddSigner(privateKey, GetSignerIdentifier(subjectKeyID), encryptionOID, digestOID, + new DefaultSignedAttributeTableGenerator(signedAttr), + new SimpleAttributeTableGenerator(unsignedAttr), + signedAttr); + } + + /** + * add a signer with extra signed/unsigned attributes based on generators. + */ + public void AddSigner( + AsymmetricKeyParameter privateKey, + X509Certificate cert, + string digestOID, + CmsAttributeTableGenerator signedAttrGen, + CmsAttributeTableGenerator unsignedAttrGen) + { + AddSigner(privateKey, cert, GetEncOid(privateKey, digestOID), digestOID, + signedAttrGen, unsignedAttrGen); + } + + /** + * add a signer, specifying the digest encryption algorithm, with extra signed/unsigned attributes based on generators. + */ + public void AddSigner( + AsymmetricKeyParameter privateKey, + X509Certificate cert, + string encryptionOID, + string digestOID, + CmsAttributeTableGenerator signedAttrGen, + CmsAttributeTableGenerator unsignedAttrGen) + { + doAddSigner(privateKey, GetSignerIdentifier(cert), encryptionOID, digestOID, signedAttrGen, + unsignedAttrGen, null); + } + + /** + * add a signer with extra signed/unsigned attributes based on generators. + */ + public void AddSigner( + AsymmetricKeyParameter privateKey, + byte[] subjectKeyID, + string digestOID, + CmsAttributeTableGenerator signedAttrGen, + CmsAttributeTableGenerator unsignedAttrGen) + { + AddSigner(privateKey, subjectKeyID, GetEncOid(privateKey, digestOID), digestOID, + signedAttrGen, unsignedAttrGen); + } + + /** + * add a signer, including digest encryption algorithm, with extra signed/unsigned attributes based on generators. + */ + public void AddSigner( + AsymmetricKeyParameter privateKey, + byte[] subjectKeyID, + string encryptionOID, + string digestOID, + CmsAttributeTableGenerator signedAttrGen, + CmsAttributeTableGenerator unsignedAttrGen) + { + doAddSigner(privateKey, GetSignerIdentifier(subjectKeyID), encryptionOID, digestOID, + signedAttrGen, unsignedAttrGen, null); + } + + private void doAddSigner( + AsymmetricKeyParameter privateKey, + SignerIdentifier signerIdentifier, + string encryptionOID, + string digestOID, + CmsAttributeTableGenerator signedAttrGen, + CmsAttributeTableGenerator unsignedAttrGen, + Asn1.Cms.AttributeTable baseSignedTable) + { + signerInfs.Add(new SignerInf(this, privateKey, signerIdentifier, digestOID, encryptionOID, + signedAttrGen, unsignedAttrGen, baseSignedTable)); + } + + /** + * generate a signed object that for a CMS Signed Data object + */ + public CmsSignedData Generate( + CmsProcessable content) + { + return Generate(content, false); + } + + /** + * generate a signed object that for a CMS Signed Data + * object - if encapsulate is true a copy + * of the message will be included in the signature. The content type + * is set according to the OID represented by the string signedContentType. + */ + public CmsSignedData Generate( + string signedContentType, + // FIXME Avoid accessing more than once to support CmsProcessableInputStream + CmsProcessable content, + bool encapsulate) + { + Asn1EncodableVector digestAlgs = new Asn1EncodableVector(); + Asn1EncodableVector signerInfos = new Asn1EncodableVector(); + + _digests.Clear(); // clear the current preserved digest state + + // + // add the precalculated SignerInfo objects. + // + foreach (SignerInformation signer in _signers) + { + digestAlgs.Add(Helper.FixAlgID(signer.DigestAlgorithmID)); + + // TODO Verify the content type and calculated digest match the precalculated SignerInfo + signerInfos.Add(signer.ToSignerInfo()); + } + + // + // add the SignerInfo objects + // + bool isCounterSignature = (signedContentType == null); + + DerObjectIdentifier contentTypeOid = isCounterSignature + ? null + : new DerObjectIdentifier(signedContentType); + + foreach (SignerInf signer in signerInfs) + { + try + { + digestAlgs.Add(signer.DigestAlgorithmID); + signerInfos.Add(signer.ToSignerInfo(contentTypeOid, content, rand)); + } + catch (IOException e) + { + throw new CmsException("encoding error.", e); + } + catch (InvalidKeyException e) + { + throw new CmsException("key inappropriate for signature.", e); + } + catch (SignatureException e) + { + throw new CmsException("error creating signature.", e); + } + catch (CertificateEncodingException e) + { + throw new CmsException("error creating sid.", e); + } + } + + Asn1Set certificates = null; + + if (_certs.Count != 0) + { + certificates = CmsUtilities.CreateBerSetFromList(_certs); + } + + Asn1Set certrevlist = null; + + if (_crls.Count != 0) + { + certrevlist = CmsUtilities.CreateBerSetFromList(_crls); + } + + Asn1OctetString octs = null; + if (encapsulate) + { + MemoryStream bOut = new MemoryStream(); + if (content != null) + { + try + { + content.Write(bOut); + } + catch (IOException e) + { + throw new CmsException("encapsulation error.", e); + } + } + octs = new BerOctetString(bOut.ToArray()); + } + + ContentInfo encInfo = new ContentInfo(contentTypeOid, octs); + + SignedData sd = new SignedData( + new DerSet(digestAlgs), + encInfo, + certificates, + certrevlist, + new DerSet(signerInfos)); + + ContentInfo contentInfo = new ContentInfo(CmsObjectIdentifiers.SignedData, sd); + + return new CmsSignedData(content, contentInfo); + } + + /** + * generate a signed object that for a CMS Signed Data + * object - if encapsulate is true a copy + * of the message will be included in the signature with the + * default content type "data". + */ + public CmsSignedData Generate( + CmsProcessable content, + bool encapsulate) + { + return this.Generate(Data, content, encapsulate); + } + + /** + * generate a set of one or more SignerInformation objects representing counter signatures on + * the passed in SignerInformation object. + * + * @param signer the signer to be countersigned + * @param sigProvider the provider to be used for counter signing. + * @return a store containing the signers. + */ + public SignerInformationStore GenerateCounterSigners( + SignerInformation signer) + { + return this.Generate(null, new CmsProcessableByteArray(signer.GetSignature()), false).GetSignerInfos(); + } + } +} diff --git a/Crypto/src/cms/CMSSignedDataParser.cs b/Crypto/src/cms/CMSSignedDataParser.cs new file mode 100644 index 000000000..dd794ee77 --- /dev/null +++ b/Crypto/src/cms/CMSSignedDataParser.cs @@ -0,0 +1,455 @@ +using System; +using System.Collections; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.IO; +using Org.BouncyCastle.Security; +using Org.BouncyCastle.Security.Certificates; +using Org.BouncyCastle.Utilities; +using Org.BouncyCastle.Utilities.Collections; +using Org.BouncyCastle.Utilities.IO; +using Org.BouncyCastle.X509; +using Org.BouncyCastle.X509.Store; + +namespace Org.BouncyCastle.Cms +{ + /** + * Parsing class for an CMS Signed Data object from an input stream. + * <p> + * Note: that because we are in a streaming mode only one signer can be tried and it is important + * that the methods on the parser are called in the appropriate order. + * </p> + * <p> + * A simple example of usage for an encapsulated signature. + * </p> + * <p> + * Two notes: first, in the example below the validity of + * the certificate isn't verified, just the fact that one of the certs + * matches the given signer, and, second, because we are in a streaming + * mode the order of the operations is important. + * </p> + * <pre> + * CmsSignedDataParser sp = new CmsSignedDataParser(encapSigData); + * + * sp.GetSignedContent().Drain(); + * + * IX509Store certs = sp.GetCertificates(); + * SignerInformationStore signers = sp.GetSignerInfos(); + * + * foreach (SignerInformation signer in signers.GetSigners()) + * { + * ArrayList certList = new ArrayList(certs.GetMatches(signer.SignerID)); + * X509Certificate cert = (X509Certificate) certList[0]; + * + * Console.WriteLine("verify returns: " + signer.Verify(cert)); + * } + * </pre> + * Note also: this class does not introduce buffering - if you are processing large files you should create + * the parser with: + * <pre> + * CmsSignedDataParser ep = new CmsSignedDataParser(new BufferedInputStream(encapSigData, bufSize)); + * </pre> + * where bufSize is a suitably large buffer size. + */ + public class CmsSignedDataParser + : CmsContentInfoParser + { + private static readonly CmsSignedHelper Helper = CmsSignedHelper.Instance; + + private SignedDataParser _signedData; + private DerObjectIdentifier _signedContentType; + private CmsTypedStream _signedContent; + private IDictionary _digests; + private ISet _digestOids; + + private SignerInformationStore _signerInfoStore; + private Asn1Set _certSet, _crlSet; + private bool _isCertCrlParsed; + private IX509Store _attributeStore; + private IX509Store _certificateStore; + private IX509Store _crlStore; + + public CmsSignedDataParser( + byte[] sigBlock) + : this(new MemoryStream(sigBlock, false)) + { + } + + public CmsSignedDataParser( + CmsTypedStream signedContent, + byte[] sigBlock) + : this(signedContent, new MemoryStream(sigBlock, false)) + { + } + + /** + * base constructor - with encapsulated content + */ + public CmsSignedDataParser( + Stream sigData) + : this(null, sigData) + { + } + + /** + * base constructor + * + * @param signedContent the content that was signed. + * @param sigData the signature object. + */ + public CmsSignedDataParser( + CmsTypedStream signedContent, + Stream sigData) + : base(sigData) + { + try + { + this._signedContent = signedContent; + this._signedData = SignedDataParser.GetInstance(this.contentInfo.GetContent(Asn1Tags.Sequence)); + this._digests = Platform.CreateHashtable(); + this._digestOids = new HashSet(); + + Asn1SetParser digAlgs = _signedData.GetDigestAlgorithms(); + IAsn1Convertible o; + + while ((o = digAlgs.ReadObject()) != null) + { + AlgorithmIdentifier id = AlgorithmIdentifier.GetInstance(o.ToAsn1Object()); + + try + { + string digestOid = id.ObjectID.Id; + string digestName = Helper.GetDigestAlgName(digestOid); + + if (!this._digests.Contains(digestName)) + { + this._digests[digestName] = Helper.GetDigestInstance(digestName); + this._digestOids.Add(digestOid); + } + } + catch (SecurityUtilityException) + { + // TODO Should do something other than ignore it + } + } + + // + // If the message is simply a certificate chain message GetContent() may return null. + // + ContentInfoParser cont = _signedData.GetEncapContentInfo(); + Asn1OctetStringParser octs = (Asn1OctetStringParser) + cont.GetContent(Asn1Tags.OctetString); + + if (octs != null) + { + CmsTypedStream ctStr = new CmsTypedStream( + cont.ContentType.Id, octs.GetOctetStream()); + + if (_signedContent == null) + { + this._signedContent = ctStr; + } + else + { + // + // content passed in, need to read past empty encapsulated content info object if present + // + ctStr.Drain(); + } + } + + _signedContentType = _signedContent == null + ? cont.ContentType + : new DerObjectIdentifier(_signedContent.ContentType); + } + catch (IOException e) + { + throw new CmsException("io exception: " + e.Message, e); + } + + if (_digests.Count < 1) + { + throw new CmsException("no digests could be created for message."); + } + } + + /** + * Return the version number for the SignedData object + * + * @return the version number + */ + public int Version + { + get { return _signedData.Version.Value.IntValue; } + } + + public ISet DigestOids + { + get { return new HashSet(_digestOids); } + } + + /** + * return the collection of signers that are associated with the + * signatures for the message. + * @throws CmsException + */ + public SignerInformationStore GetSignerInfos() + { + if (_signerInfoStore == null) + { + PopulateCertCrlSets(); + + IList signerInfos = Platform.CreateArrayList(); + IDictionary hashes = Platform.CreateHashtable(); + + foreach (object digestKey in _digests.Keys) + { + hashes[digestKey] = DigestUtilities.DoFinal( + (IDigest)_digests[digestKey]); + } + + try + { + Asn1SetParser s = _signedData.GetSignerInfos(); + IAsn1Convertible o; + + while ((o = s.ReadObject()) != null) + { + SignerInfo info = SignerInfo.GetInstance(o.ToAsn1Object()); + string digestName = Helper.GetDigestAlgName( + info.DigestAlgorithm.ObjectID.Id); + + byte[] hash = (byte[]) hashes[digestName]; + + signerInfos.Add(new SignerInformation(info, _signedContentType, null, new BaseDigestCalculator(hash))); + } + } + catch (IOException e) + { + throw new CmsException("io exception: " + e.Message, e); + } + + _signerInfoStore = new SignerInformationStore(signerInfos); + } + + return _signerInfoStore; + } + + /** + * return a X509Store containing the attribute certificates, if any, contained + * in this message. + * + * @param type type of store to create + * @return a store of attribute certificates + * @exception org.bouncycastle.x509.NoSuchStoreException if the store type isn't available. + * @exception CmsException if a general exception prevents creation of the X509Store + */ + public IX509Store GetAttributeCertificates( + string type) + { + if (_attributeStore == null) + { + PopulateCertCrlSets(); + + _attributeStore = Helper.CreateAttributeStore(type, _certSet); + } + + return _attributeStore; + } + + /** + * return a X509Store containing the public key certificates, if any, contained + * in this message. + * + * @param type type of store to create + * @return a store of public key certificates + * @exception NoSuchStoreException if the store type isn't available. + * @exception CmsException if a general exception prevents creation of the X509Store + */ + public IX509Store GetCertificates( + string type) + { + if (_certificateStore == null) + { + PopulateCertCrlSets(); + + _certificateStore = Helper.CreateCertificateStore(type, _certSet); + } + + return _certificateStore; + } + + /** + * return a X509Store containing CRLs, if any, contained + * in this message. + * + * @param type type of store to create + * @return a store of CRLs + * @exception NoSuchStoreException if the store type isn't available. + * @exception CmsException if a general exception prevents creation of the X509Store + */ + public IX509Store GetCrls( + string type) + { + if (_crlStore == null) + { + PopulateCertCrlSets(); + + _crlStore = Helper.CreateCrlStore(type, _crlSet); + } + + return _crlStore; + } + + private void PopulateCertCrlSets() + { + if (_isCertCrlParsed) + return; + + _isCertCrlParsed = true; + + try + { + // care! Streaming - Must process the GetCertificates() result before calling GetCrls() + _certSet = GetAsn1Set(_signedData.GetCertificates()); + _crlSet = GetAsn1Set(_signedData.GetCrls()); + } + catch (IOException e) + { + throw new CmsException("problem parsing cert/crl sets", e); + } + } + + /// <summary> + /// Return the <c>DerObjectIdentifier</c> associated with the encapsulated + /// content info structure carried in the signed data. + /// </summary> + public DerObjectIdentifier SignedContentType + { + get { return _signedContentType; } + } + + public CmsTypedStream GetSignedContent() + { + if (_signedContent == null) + { + return null; + } + + Stream digStream = _signedContent.ContentStream; + + foreach (IDigest digest in _digests.Values) + { + digStream = new DigestStream(digStream, digest, null); + } + + return new CmsTypedStream(_signedContent.ContentType, digStream); + } + + /** + * Replace the signerinformation store associated with the passed + * in message contained in the stream original with the new one passed in. + * You would probably only want to do this if you wanted to change the unsigned + * attributes associated with a signer, or perhaps delete one. + * <p> + * The output stream is returned unclosed. + * </p> + * @param original the signed data stream to be used as a base. + * @param signerInformationStore the new signer information store to use. + * @param out the stream to Write the new signed data object to. + * @return out. + */ + public static Stream ReplaceSigners( + Stream original, + SignerInformationStore signerInformationStore, + Stream outStr) + { + // NB: SecureRandom would be ignored since using existing signatures only + CmsSignedDataStreamGenerator gen = new CmsSignedDataStreamGenerator(); + CmsSignedDataParser parser = new CmsSignedDataParser(original); + +// gen.AddDigests(parser.DigestOids); + gen.AddSigners(signerInformationStore); + + CmsTypedStream signedContent = parser.GetSignedContent(); + bool encapsulate = (signedContent != null); + Stream contentOut = gen.Open(outStr, parser.SignedContentType.Id, encapsulate); + if (encapsulate) + { + Streams.PipeAll(signedContent.ContentStream, contentOut); + } + + gen.AddAttributeCertificates(parser.GetAttributeCertificates("Collection")); + gen.AddCertificates(parser.GetCertificates("Collection")); + gen.AddCrls(parser.GetCrls("Collection")); + +// gen.AddSigners(parser.GetSignerInfos()); + + contentOut.Dispose(); + + return outStr; + } + + /** + * Replace the certificate and CRL information associated with this + * CMSSignedData object with the new one passed in. + * <p> + * The output stream is returned unclosed. + * </p> + * @param original the signed data stream to be used as a base. + * @param certsAndCrls the new certificates and CRLs to be used. + * @param out the stream to Write the new signed data object to. + * @return out. + * @exception CmsException if there is an error processing the CertStore + */ + public static Stream ReplaceCertificatesAndCrls( + Stream original, + IX509Store x509Certs, + IX509Store x509Crls, + IX509Store x509AttrCerts, + Stream outStr) + { + // NB: SecureRandom would be ignored since using existing signatures only + CmsSignedDataStreamGenerator gen = new CmsSignedDataStreamGenerator(); + CmsSignedDataParser parser = new CmsSignedDataParser(original); + + gen.AddDigests(parser.DigestOids); + + CmsTypedStream signedContent = parser.GetSignedContent(); + bool encapsulate = (signedContent != null); + Stream contentOut = gen.Open(outStr, parser.SignedContentType.Id, encapsulate); + if (encapsulate) + { + Streams.PipeAll(signedContent.ContentStream, contentOut); + } + +// gen.AddAttributeCertificates(parser.GetAttributeCertificates("Collection")); +// gen.AddCertificates(parser.GetCertificates("Collection")); +// gen.AddCrls(parser.GetCrls("Collection")); + if (x509AttrCerts != null) + gen.AddAttributeCertificates(x509AttrCerts); + if (x509Certs != null) + gen.AddCertificates(x509Certs); + if (x509Crls != null) + gen.AddCrls(x509Crls); + + gen.AddSigners(parser.GetSignerInfos()); + + contentOut.Dispose(); + + return outStr; + } + + private static Asn1Set GetAsn1Set( + Asn1SetParser asn1SetParser) + { + return asn1SetParser == null + ? null + : Asn1Set.GetInstance(asn1SetParser.ToAsn1Object()); + } + } +} diff --git a/Crypto/src/cms/CMSSignedDataStreamGenerator.cs b/Crypto/src/cms/CMSSignedDataStreamGenerator.cs new file mode 100644 index 000000000..0bed9fcad --- /dev/null +++ b/Crypto/src/cms/CMSSignedDataStreamGenerator.cs @@ -0,0 +1,917 @@ +using System; +using System.Collections; +using System.Diagnostics; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.IO; +using Org.BouncyCastle.Crypto.Parameters; +using Org.BouncyCastle.Security; +using Org.BouncyCastle.Security.Certificates; +using Org.BouncyCastle.Utilities; +using Org.BouncyCastle.Utilities.Collections; +using Org.BouncyCastle.Utilities.IO; +using Org.BouncyCastle.X509; + +namespace Org.BouncyCastle.Cms +{ + /** + * General class for generating a pkcs7-signature message stream. + * <p> + * A simple example of usage. + * </p> + * <pre> + * IX509Store certs... + * CmsSignedDataStreamGenerator gen = new CmsSignedDataStreamGenerator(); + * + * gen.AddSigner(privateKey, cert, CmsSignedDataStreamGenerator.DIGEST_SHA1); + * + * gen.AddCertificates(certs); + * + * Stream sigOut = gen.Open(bOut); + * + * sigOut.Write(Encoding.UTF8.GetBytes("Hello World!")); + * + * sigOut.Close(); + * </pre> + */ + public class CmsSignedDataStreamGenerator + : CmsSignedGenerator + { + private static readonly CmsSignedHelper Helper = CmsSignedHelper.Instance; + + private readonly IList _signerInfs = Platform.CreateArrayList(); + private readonly ISet _messageDigestOids = new HashSet(); + private readonly IDictionary _messageDigests = Platform.CreateHashtable(); + private readonly IDictionary _messageHashes = Platform.CreateHashtable(); + private bool _messageDigestsLocked; + private int _bufferSize; + + private class DigestAndSignerInfoGeneratorHolder + { + internal readonly SignerInfoGenerator signerInf; + internal readonly string digestOID; + + internal DigestAndSignerInfoGeneratorHolder(SignerInfoGenerator signerInf, String digestOID) + { + this.signerInf = signerInf; + this.digestOID = digestOID; + } + + internal AlgorithmIdentifier DigestAlgorithm + { + get { return new AlgorithmIdentifier(new DerObjectIdentifier(this.digestOID), DerNull.Instance); } + } + } + + private class SignerInfoGeneratorImpl : SignerInfoGenerator + { + private readonly CmsSignedDataStreamGenerator outer; + + private readonly SignerIdentifier _signerIdentifier; + private readonly string _digestOID; + private readonly string _encOID; + private readonly CmsAttributeTableGenerator _sAttr; + private readonly CmsAttributeTableGenerator _unsAttr; + private readonly string _encName; + private readonly ISigner _sig; + + internal SignerInfoGeneratorImpl( + CmsSignedDataStreamGenerator outer, + AsymmetricKeyParameter key, + SignerIdentifier signerIdentifier, + string digestOID, + string encOID, + CmsAttributeTableGenerator sAttr, + CmsAttributeTableGenerator unsAttr) + { + this.outer = outer; + + _signerIdentifier = signerIdentifier; + _digestOID = digestOID; + _encOID = encOID; + _sAttr = sAttr; + _unsAttr = unsAttr; + _encName = Helper.GetEncryptionAlgName(_encOID); + + string digestName = Helper.GetDigestAlgName(_digestOID); + string signatureName = digestName + "with" + _encName; + + if (_sAttr != null) + { + _sig = Helper.GetSignatureInstance(signatureName); + } + else + { + // Note: Need to use raw signatures here since we have already calculated the digest + if (_encName.Equals("RSA")) + { + _sig = Helper.GetSignatureInstance("RSA"); + } + else if (_encName.Equals("DSA")) + { + _sig = Helper.GetSignatureInstance("NONEwithDSA"); + } + // TODO Add support for raw PSS +// else if (_encName.equals("RSAandMGF1")) +// { +// _sig = CMSSignedHelper.INSTANCE.getSignatureInstance("NONEWITHRSAPSS", _sigProvider); +// try +// { +// // Init the params this way to avoid having a 'raw' version of each PSS algorithm +// Signature sig2 = CMSSignedHelper.INSTANCE.getSignatureInstance(signatureName, _sigProvider); +// PSSParameterSpec spec = (PSSParameterSpec)sig2.getParameters().getParameterSpec(PSSParameterSpec.class); +// _sig.setParameter(spec); +// } +// catch (Exception e) +// { +// throw new SignatureException("algorithm: " + _encName + " could not be configured."); +// } +// } + else + { + throw new SignatureException("algorithm: " + _encName + " not supported in base signatures."); + } + } + + _sig.Init(true, new ParametersWithRandom(key, outer.rand)); + } + + public SignerInfo Generate(DerObjectIdentifier contentType, AlgorithmIdentifier digestAlgorithm, + byte[] calculatedDigest) + { + try + { + string digestName = Helper.GetDigestAlgName(_digestOID); + string signatureName = digestName + "with" + _encName; + +// AlgorithmIdentifier digAlgId = DigestAlgorithmID; +// +// byte[] hash = (byte[])outer._messageHashes[Helper.GetDigestAlgName(this._digestOID)]; +// outer._digests[_digestOID] = hash.Clone(); + + byte[] bytesToSign = calculatedDigest; + + /* RFC 3852 5.4 + * The result of the message digest calculation process depends on + * whether the signedAttrs field is present. When the field is absent, + * the result is just the message digest of the content as described + * + * above. When the field is present, however, the result is the message + * digest of the complete DER encoding of the SignedAttrs value + * contained in the signedAttrs field. + */ + Asn1Set signedAttr = null; + if (_sAttr != null) + { + IDictionary parameters = outer.GetBaseParameters(contentType, digestAlgorithm, calculatedDigest); + +// Asn1.Cms.AttributeTable signed = _sAttr.GetAttributes(Collections.unmodifiableMap(parameters)); + Asn1.Cms.AttributeTable signed = _sAttr.GetAttributes(parameters); + + if (contentType == null) //counter signature + { + if (signed != null && signed[CmsAttributes.ContentType] != null) + { + IDictionary tmpSigned = signed.ToDictionary(); + tmpSigned.Remove(CmsAttributes.ContentType); + signed = new Asn1.Cms.AttributeTable(tmpSigned); + } + } + + signedAttr = outer.GetAttributeSet(signed); + + // sig must be composed from the DER encoding. + bytesToSign = signedAttr.GetEncoded(Asn1Encodable.Der); + } + else + { + // Note: Need to use raw signatures here since we have already calculated the digest + if (_encName.Equals("RSA")) + { + DigestInfo dInfo = new DigestInfo(digestAlgorithm, calculatedDigest); + bytesToSign = dInfo.GetEncoded(Asn1Encodable.Der); + } + } + + _sig.BlockUpdate(bytesToSign, 0, bytesToSign.Length); + byte[] sigBytes = _sig.GenerateSignature(); + + Asn1Set unsignedAttr = null; + if (_unsAttr != null) + { + IDictionary parameters = outer.GetBaseParameters( + contentType, digestAlgorithm, calculatedDigest); + parameters[CmsAttributeTableParameter.Signature] = sigBytes.Clone(); + +// Asn1.Cms.AttributeTable unsigned = _unsAttr.getAttributes(Collections.unmodifiableMap(parameters)); + Asn1.Cms.AttributeTable unsigned = _unsAttr.GetAttributes(parameters); + + unsignedAttr = outer.GetAttributeSet(unsigned); + } + + // TODO[RSAPSS] Need the ability to specify non-default parameters + Asn1Encodable sigX509Parameters = SignerUtilities.GetDefaultX509Parameters(signatureName); + AlgorithmIdentifier digestEncryptionAlgorithm = CmsSignedGenerator.GetEncAlgorithmIdentifier( + new DerObjectIdentifier(_encOID), sigX509Parameters); + + return new SignerInfo(_signerIdentifier, digestAlgorithm, + signedAttr, digestEncryptionAlgorithm, new DerOctetString(sigBytes), unsignedAttr); + } + catch (IOException e) + { + throw new CmsStreamException("encoding error.", e); + } + catch (SignatureException e) + { + throw new CmsStreamException("error creating signature.", e); + } + } + } + + public CmsSignedDataStreamGenerator() + { + } + + /// <summary>Constructor allowing specific source of randomness</summary> + /// <param name="rand">Instance of <c>SecureRandom</c> to use.</param> + public CmsSignedDataStreamGenerator( + SecureRandom rand) + : base(rand) + { + } + + /** + * Set the underlying string size for encapsulated data + * + * @param bufferSize length of octet strings to buffer the data. + */ + public void SetBufferSize( + int bufferSize) + { + _bufferSize = bufferSize; + } + + public void AddDigests( + params string[] digestOids) + { + AddDigests((IEnumerable) digestOids); + } + + public void AddDigests( + IEnumerable digestOids) + { + foreach (string digestOid in digestOids) + { + ConfigureDigest(digestOid); + } + } + + /** + * add a signer - no attributes other than the default ones will be + * provided here. + * @throws NoSuchAlgorithmException + * @throws InvalidKeyException + */ + public void AddSigner( + AsymmetricKeyParameter privateKey, + X509Certificate cert, + string digestOid) + { + AddSigner(privateKey, cert, digestOid, + new DefaultSignedAttributeTableGenerator(), null); + } + + /** + * add a signer, specifying the digest encryption algorithm - no attributes other than the default ones will be + * provided here. + * @throws NoSuchProviderException + * @throws NoSuchAlgorithmException + * @throws InvalidKeyException + */ + public void AddSigner( + AsymmetricKeyParameter privateKey, + X509Certificate cert, + string encryptionOid, + string digestOid) + { + AddSigner(privateKey, cert, encryptionOid, digestOid, + new DefaultSignedAttributeTableGenerator(), + (CmsAttributeTableGenerator)null); + } + + /** + * add a signer with extra signed/unsigned attributes. + * @throws NoSuchAlgorithmException + * @throws InvalidKeyException + */ + public void AddSigner( + AsymmetricKeyParameter privateKey, + X509Certificate cert, + string digestOid, + Asn1.Cms.AttributeTable signedAttr, + Asn1.Cms.AttributeTable unsignedAttr) + { + AddSigner(privateKey, cert, digestOid, + new DefaultSignedAttributeTableGenerator(signedAttr), + new SimpleAttributeTableGenerator(unsignedAttr)); + } + + /** + * add a signer with extra signed/unsigned attributes - specifying digest + * encryption algorithm. + * @throws NoSuchProviderException + * @throws NoSuchAlgorithmException + * @throws InvalidKeyException + */ + public void AddSigner( + AsymmetricKeyParameter privateKey, + X509Certificate cert, + string encryptionOid, + string digestOid, + Asn1.Cms.AttributeTable signedAttr, + Asn1.Cms.AttributeTable unsignedAttr) + { + AddSigner(privateKey, cert, encryptionOid, digestOid, + new DefaultSignedAttributeTableGenerator(signedAttr), + new SimpleAttributeTableGenerator(unsignedAttr)); + } + + public void AddSigner( + AsymmetricKeyParameter privateKey, + X509Certificate cert, + string digestOid, + CmsAttributeTableGenerator signedAttrGenerator, + CmsAttributeTableGenerator unsignedAttrGenerator) + { + AddSigner(privateKey, cert, GetEncOid(privateKey, digestOid), digestOid, + signedAttrGenerator, unsignedAttrGenerator); + } + + public void AddSigner( + AsymmetricKeyParameter privateKey, + X509Certificate cert, + string encryptionOid, + string digestOid, + CmsAttributeTableGenerator signedAttrGenerator, + CmsAttributeTableGenerator unsignedAttrGenerator) + { + DoAddSigner(privateKey, GetSignerIdentifier(cert), encryptionOid, digestOid, + signedAttrGenerator, unsignedAttrGenerator); + } + + /** + * add a signer - no attributes other than the default ones will be + * provided here. + * @throws NoSuchAlgorithmException + * @throws InvalidKeyException + */ + public void AddSigner( + AsymmetricKeyParameter privateKey, + byte[] subjectKeyID, + string digestOid) + { + AddSigner(privateKey, subjectKeyID, digestOid, new DefaultSignedAttributeTableGenerator(), + (CmsAttributeTableGenerator)null); + } + + /** + * add a signer - no attributes other than the default ones will be + * provided here. + * @throws NoSuchProviderException + * @throws NoSuchAlgorithmException + * @throws InvalidKeyException + */ + public void AddSigner( + AsymmetricKeyParameter privateKey, + byte[] subjectKeyID, + string encryptionOid, + string digestOid) + { + AddSigner(privateKey, subjectKeyID, encryptionOid, digestOid, + new DefaultSignedAttributeTableGenerator(), + (CmsAttributeTableGenerator)null); + } + + /** + * add a signer with extra signed/unsigned attributes. + * @throws NoSuchAlgorithmException + * @throws InvalidKeyException + */ + public void AddSigner( + AsymmetricKeyParameter privateKey, + byte[] subjectKeyID, + string digestOid, + Asn1.Cms.AttributeTable signedAttr, + Asn1.Cms.AttributeTable unsignedAttr) + { + AddSigner(privateKey, subjectKeyID, digestOid, + new DefaultSignedAttributeTableGenerator(signedAttr), + new SimpleAttributeTableGenerator(unsignedAttr)); + } + + public void AddSigner( + AsymmetricKeyParameter privateKey, + byte[] subjectKeyID, + string digestOid, + CmsAttributeTableGenerator signedAttrGenerator, + CmsAttributeTableGenerator unsignedAttrGenerator) + { + AddSigner(privateKey, subjectKeyID, GetEncOid(privateKey, digestOid), + digestOid, signedAttrGenerator, unsignedAttrGenerator); + } + + public void AddSigner( + AsymmetricKeyParameter privateKey, + byte[] subjectKeyID, + string encryptionOid, + string digestOid, + CmsAttributeTableGenerator signedAttrGenerator, + CmsAttributeTableGenerator unsignedAttrGenerator) + { + DoAddSigner(privateKey, GetSignerIdentifier(subjectKeyID), encryptionOid, digestOid, + signedAttrGenerator, unsignedAttrGenerator); + } + + private void DoAddSigner( + AsymmetricKeyParameter privateKey, + SignerIdentifier signerIdentifier, + string encryptionOid, + string digestOid, + CmsAttributeTableGenerator signedAttrGenerator, + CmsAttributeTableGenerator unsignedAttrGenerator) + { + ConfigureDigest(digestOid); + + SignerInfoGeneratorImpl signerInf = new SignerInfoGeneratorImpl(this, privateKey, + signerIdentifier, digestOid, encryptionOid, signedAttrGenerator, unsignedAttrGenerator); + + _signerInfs.Add(new DigestAndSignerInfoGeneratorHolder(signerInf, digestOid)); + } + + internal override void AddSignerCallback( + SignerInformation si) + { + // FIXME If there were parameters in si.DigestAlgorithmID.Parameters, they are lost + // NB: Would need to call FixAlgID on the DigestAlgorithmID + + // For precalculated signers, just need to register the algorithm, not configure a digest + RegisterDigestOid(si.DigestAlgorithmID.ObjectID.Id); + } + + /** + * generate a signed object that for a CMS Signed Data object + */ + public Stream Open( + Stream outStream) + { + return Open(outStream, false); + } + + /** + * generate a signed object that for a CMS Signed Data + * object - if encapsulate is true a copy + * of the message will be included in the signature with the + * default content type "data". + */ + public Stream Open( + Stream outStream, + bool encapsulate) + { + return Open(outStream, Data, encapsulate); + } + + /** + * generate a signed object that for a CMS Signed Data + * object using the given provider - if encapsulate is true a copy + * of the message will be included in the signature with the + * default content type "data". If dataOutputStream is non null the data + * being signed will be written to the stream as it is processed. + * @param out stream the CMS object is to be written to. + * @param encapsulate true if data should be encapsulated. + * @param dataOutputStream output stream to copy the data being signed to. + */ + public Stream Open( + Stream outStream, + bool encapsulate, + Stream dataOutputStream) + { + return Open(outStream, Data, encapsulate, dataOutputStream); + } + + /** + * generate a signed object that for a CMS Signed Data + * object - if encapsulate is true a copy + * of the message will be included in the signature. The content type + * is set according to the OID represented by the string signedContentType. + */ + public Stream Open( + Stream outStream, + string signedContentType, + bool encapsulate) + { + return Open(outStream, signedContentType, encapsulate, null); + } + + /** + * generate a signed object that for a CMS Signed Data + * object using the given provider - if encapsulate is true a copy + * of the message will be included in the signature. The content type + * is set according to the OID represented by the string signedContentType. + * @param out stream the CMS object is to be written to. + * @param signedContentType OID for data to be signed. + * @param encapsulate true if data should be encapsulated. + * @param dataOutputStream output stream to copy the data being signed to. + */ + public Stream Open( + Stream outStream, + string signedContentType, + bool encapsulate, + Stream dataOutputStream) + { + if (outStream == null) + throw new ArgumentNullException("outStream"); + if (!outStream.CanWrite) + throw new ArgumentException("Expected writeable stream", "outStream"); + if (dataOutputStream != null && !dataOutputStream.CanWrite) + throw new ArgumentException("Expected writeable stream", "dataOutputStream"); + + _messageDigestsLocked = true; + + // + // ContentInfo + // + BerSequenceGenerator sGen = new BerSequenceGenerator(outStream); + + sGen.AddObject(CmsObjectIdentifiers.SignedData); + + // + // Signed Data + // + BerSequenceGenerator sigGen = new BerSequenceGenerator( + sGen.GetRawOutputStream(), 0, true); + + bool isCounterSignature = (signedContentType == null); + + DerObjectIdentifier contentTypeOid = isCounterSignature + ? null + : new DerObjectIdentifier(signedContentType); + + sigGen.AddObject(CalculateVersion(contentTypeOid)); + + Asn1EncodableVector digestAlgs = new Asn1EncodableVector(); + + foreach (string digestOid in _messageDigestOids) + { + digestAlgs.Add( + new AlgorithmIdentifier(new DerObjectIdentifier(digestOid), DerNull.Instance)); + } + + { + byte[] tmp = new DerSet(digestAlgs).GetEncoded(); + sigGen.GetRawOutputStream().Write(tmp, 0, tmp.Length); + } + + BerSequenceGenerator eiGen = new BerSequenceGenerator(sigGen.GetRawOutputStream()); + eiGen.AddObject(contentTypeOid); + + // If encapsulating, add the data as an octet string in the sequence + Stream encapStream = encapsulate + ? CmsUtilities.CreateBerOctetOutputStream(eiGen.GetRawOutputStream(), 0, true, _bufferSize) + : null; + + // Also send the data to 'dataOutputStream' if necessary + Stream teeStream = GetSafeTeeOutputStream(dataOutputStream, encapStream); + + // Let all the digests see the data as it is written + Stream digStream = AttachDigestsToOutputStream(_messageDigests.Values, teeStream); + + return new CmsSignedDataOutputStream(this, digStream, signedContentType, sGen, sigGen, eiGen); + } + + private void RegisterDigestOid( + string digestOid) + { + if (_messageDigestsLocked) + { + if (!_messageDigestOids.Contains(digestOid)) + throw new InvalidOperationException("Cannot register new digest OIDs after the data stream is opened"); + } + else + { + _messageDigestOids.Add(digestOid); + } + } + + private void ConfigureDigest( + string digestOid) + { + RegisterDigestOid(digestOid); + + string digestName = Helper.GetDigestAlgName(digestOid); + IDigest dig = (IDigest)_messageDigests[digestName]; + if (dig == null) + { + if (_messageDigestsLocked) + throw new InvalidOperationException("Cannot configure new digests after the data stream is opened"); + + dig = Helper.GetDigestInstance(digestName); + _messageDigests[digestName] = dig; + } + } + + // TODO Make public? + internal void Generate( + Stream outStream, + string eContentType, + bool encapsulate, + Stream dataOutputStream, + CmsProcessable content) + { + Stream signedOut = Open(outStream, eContentType, encapsulate, dataOutputStream); + if (content != null) + { + content.Write(signedOut); + } + signedOut.Dispose(); + } + + // RFC3852, section 5.1: + // IF ((certificates is present) AND + // (any certificates with a type of other are present)) OR + // ((crls is present) AND + // (any crls with a type of other are present)) + // THEN version MUST be 5 + // ELSE + // IF (certificates is present) AND + // (any version 2 attribute certificates are present) + // THEN version MUST be 4 + // ELSE + // IF ((certificates is present) AND + // (any version 1 attribute certificates are present)) OR + // (any SignerInfo structures are version 3) OR + // (encapContentInfo eContentType is other than id-data) + // THEN version MUST be 3 + // ELSE version MUST be 1 + // + private DerInteger CalculateVersion( + DerObjectIdentifier contentOid) + { + bool otherCert = false; + bool otherCrl = false; + bool attrCertV1Found = false; + bool attrCertV2Found = false; + + if (_certs != null) + { + foreach (object obj in _certs) + { + if (obj is Asn1TaggedObject) + { + Asn1TaggedObject tagged = (Asn1TaggedObject) obj; + + if (tagged.TagNo == 1) + { + attrCertV1Found = true; + } + else if (tagged.TagNo == 2) + { + attrCertV2Found = true; + } + else if (tagged.TagNo == 3) + { + otherCert = true; + break; + } + } + } + } + + if (otherCert) + { + return new DerInteger(5); + } + + if (_crls != null) + { + foreach (object obj in _crls) + { + if (obj is Asn1TaggedObject) + { + otherCrl = true; + break; + } + } + } + + if (otherCrl) + { + return new DerInteger(5); + } + + if (attrCertV2Found) + { + return new DerInteger(4); + } + + if (attrCertV1Found || !CmsObjectIdentifiers.Data.Equals(contentOid) || CheckForVersion3(_signers)) + { + return new DerInteger(3); + } + + return new DerInteger(1); + } + + private bool CheckForVersion3( + IList signerInfos) + { + foreach (SignerInformation si in signerInfos) + { + SignerInfo s = SignerInfo.GetInstance(si.ToSignerInfo()); + + if (s.Version.Value.IntValue == 3) + { + return true; + } + } + + return false; + } + + private static Stream AttachDigestsToOutputStream(ICollection digests, Stream s) + { + Stream result = s; + foreach (IDigest digest in digests) + { + result = GetSafeTeeOutputStream(result, new DigOutputStream(digest)); + } + return result; + } + + private static Stream GetSafeOutputStream(Stream s) + { + if (s == null) + return new NullOutputStream(); + return s; + } + + private static Stream GetSafeTeeOutputStream(Stream s1, Stream s2) + { + if (s1 == null) + return GetSafeOutputStream(s2); + if (s2 == null) + return GetSafeOutputStream(s1); + return new TeeOutputStream(s1, s2); + } + + private class CmsSignedDataOutputStream + : BaseOutputStream + { + private readonly CmsSignedDataStreamGenerator outer; + + private Stream _out; + private DerObjectIdentifier _contentOID; + private BerSequenceGenerator _sGen; + private BerSequenceGenerator _sigGen; + private BerSequenceGenerator _eiGen; + + public CmsSignedDataOutputStream( + CmsSignedDataStreamGenerator outer, + Stream outStream, + string contentOID, + BerSequenceGenerator sGen, + BerSequenceGenerator sigGen, + BerSequenceGenerator eiGen) + { + this.outer = outer; + + _out = outStream; + _contentOID = new DerObjectIdentifier(contentOID); + _sGen = sGen; + _sigGen = sigGen; + _eiGen = eiGen; + } + + public override void WriteByte( + byte b) + { + _out.WriteByte(b); + } + + public override void Write( + byte[] bytes, + int off, + int len) + { + _out.Write(bytes, off, len); + } + + protected override void Dispose(bool disposing) + { + if (disposing) + { + _out.Dispose(); + + // TODO Parent context(s) should really be be closed explicitly + + _eiGen.Close(); + + outer._digests.Clear(); // clear the current preserved digest state + + if (outer._certs.Count > 0) + { + Asn1Set certs = CmsUtilities.CreateBerSetFromList(outer._certs); + + WriteToGenerator(_sigGen, new BerTaggedObject(false, 0, certs)); + } + + if (outer._crls.Count > 0) + { + Asn1Set crls = CmsUtilities.CreateBerSetFromList(outer._crls); + + WriteToGenerator(_sigGen, new BerTaggedObject(false, 1, crls)); + } + + // + // Calculate the digest hashes + // + foreach (DictionaryEntry de in outer._messageDigests) + { + outer._messageHashes.Add(de.Key, DigestUtilities.DoFinal((IDigest)de.Value)); + } + + // TODO If the digest OIDs for precalculated signers weren't mixed in with + // the others, we could fill in outer._digests here, instead of SignerInfoGenerator.Generate + + // + // collect all the SignerInfo objects + // + Asn1EncodableVector signerInfos = new Asn1EncodableVector(); + + // + // add the generated SignerInfo objects + // + { + foreach (DigestAndSignerInfoGeneratorHolder holder in outer._signerInfs) + { + AlgorithmIdentifier digestAlgorithm = holder.DigestAlgorithm; + + byte[] calculatedDigest = (byte[])outer._messageHashes[ + Helper.GetDigestAlgName(holder.digestOID)]; + outer._digests[holder.digestOID] = calculatedDigest.Clone(); + + signerInfos.Add(holder.signerInf.Generate(_contentOID, digestAlgorithm, calculatedDigest)); + } + } + + // + // add the precalculated SignerInfo objects. + // + { + foreach (SignerInformation signer in outer._signers) + { + // TODO Verify the content type and calculated digest match the precalculated SignerInfo + // if (!signer.ContentType.Equals(_contentOID)) + // { + // // TODO The precalculated content type did not match - error? + // } + // + // byte[] calculatedDigest = (byte[])outer._digests[signer.DigestAlgOid]; + // if (calculatedDigest == null) + // { + // // TODO We can't confirm this digest because we didn't calculate it - error? + // } + // else + // { + // if (!Arrays.AreEqual(signer.GetContentDigest(), calculatedDigest)) + // { + // // TODO The precalculated digest did not match - error? + // } + // } + + signerInfos.Add(signer.ToSignerInfo()); + } + } + + WriteToGenerator(_sigGen, new DerSet(signerInfos)); + + _sigGen.Close(); + _sGen.Close(); + } + + base.Dispose(disposing); + } + + private static void WriteToGenerator( + Asn1Generator ag, + Asn1Encodable ae) + { + byte[] encoded = ae.GetEncoded(); + ag.GetRawOutputStream().Write(encoded, 0, encoded.Length); + } + } + } +} diff --git a/Crypto/src/cms/CMSSignedGenerator.cs b/Crypto/src/cms/CMSSignedGenerator.cs new file mode 100644 index 000000000..f272c830e --- /dev/null +++ b/Crypto/src/cms/CMSSignedGenerator.cs @@ -0,0 +1,261 @@ +using System; +using System.Collections; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.CryptoPro; +using Org.BouncyCastle.Asn1.Nist; +using Org.BouncyCastle.Asn1.Oiw; +using Org.BouncyCastle.Asn1.Pkcs; +using Org.BouncyCastle.Asn1.TeleTrust; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Asn1.X9; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.Parameters; +using Org.BouncyCastle.Security; +using Org.BouncyCastle.Utilities; +using Org.BouncyCastle.Utilities.Collections; +using Org.BouncyCastle.Utilities.IO; +using Org.BouncyCastle.X509; +using Org.BouncyCastle.X509.Store; + +namespace Org.BouncyCastle.Cms +{ + public class CmsSignedGenerator + { + /** + * Default type for the signed data. + */ + public static readonly string Data = CmsObjectIdentifiers.Data.Id; + + public static readonly string DigestSha1 = OiwObjectIdentifiers.IdSha1.Id; + public static readonly string DigestSha224 = NistObjectIdentifiers.IdSha224.Id; + public static readonly string DigestSha256 = NistObjectIdentifiers.IdSha256.Id; + public static readonly string DigestSha384 = NistObjectIdentifiers.IdSha384.Id; + public static readonly string DigestSha512 = NistObjectIdentifiers.IdSha512.Id; + public static readonly string DigestMD5 = PkcsObjectIdentifiers.MD5.Id; + public static readonly string DigestGost3411 = CryptoProObjectIdentifiers.GostR3411.Id; + public static readonly string DigestRipeMD128 = TeleTrusTObjectIdentifiers.RipeMD128.Id; + public static readonly string DigestRipeMD160 = TeleTrusTObjectIdentifiers.RipeMD160.Id; + public static readonly string DigestRipeMD256 = TeleTrusTObjectIdentifiers.RipeMD256.Id; + + public static readonly string EncryptionRsa = PkcsObjectIdentifiers.RsaEncryption.Id; + public static readonly string EncryptionDsa = X9ObjectIdentifiers.IdDsaWithSha1.Id; + public static readonly string EncryptionECDsa = X9ObjectIdentifiers.ECDsaWithSha1.Id; + public static readonly string EncryptionRsaPss = PkcsObjectIdentifiers.IdRsassaPss.Id; + public static readonly string EncryptionGost3410 = CryptoProObjectIdentifiers.GostR3410x94.Id; + public static readonly string EncryptionECGost3410 = CryptoProObjectIdentifiers.GostR3410x2001.Id; + + private static readonly string EncryptionECDsaWithSha1 = X9ObjectIdentifiers.ECDsaWithSha1.Id; + private static readonly string EncryptionECDsaWithSha224 = X9ObjectIdentifiers.ECDsaWithSha224.Id; + private static readonly string EncryptionECDsaWithSha256 = X9ObjectIdentifiers.ECDsaWithSha256.Id; + private static readonly string EncryptionECDsaWithSha384 = X9ObjectIdentifiers.ECDsaWithSha384.Id; + private static readonly string EncryptionECDsaWithSha512 = X9ObjectIdentifiers.ECDsaWithSha512.Id; + + private static readonly ISet noParams = new HashSet(); + private static readonly IDictionary ecAlgorithms = Platform.CreateHashtable(); + + static CmsSignedGenerator() + { + noParams.Add(EncryptionDsa); +// noParams.Add(EncryptionECDsa); + noParams.Add(EncryptionECDsaWithSha1); + noParams.Add(EncryptionECDsaWithSha224); + noParams.Add(EncryptionECDsaWithSha256); + noParams.Add(EncryptionECDsaWithSha384); + noParams.Add(EncryptionECDsaWithSha512); + + ecAlgorithms.Add(DigestSha1, EncryptionECDsaWithSha1); + ecAlgorithms.Add(DigestSha224, EncryptionECDsaWithSha224); + ecAlgorithms.Add(DigestSha256, EncryptionECDsaWithSha256); + ecAlgorithms.Add(DigestSha384, EncryptionECDsaWithSha384); + ecAlgorithms.Add(DigestSha512, EncryptionECDsaWithSha512); + } + + internal IList _certs = Platform.CreateArrayList(); + internal IList _crls = Platform.CreateArrayList(); + internal IList _signers = Platform.CreateArrayList(); + internal IDictionary _digests = Platform.CreateHashtable(); + + protected readonly SecureRandom rand; + + protected CmsSignedGenerator() + : this(new SecureRandom()) + { + } + + /// <summary>Constructor allowing specific source of randomness</summary> + /// <param name="rand">Instance of <c>SecureRandom</c> to use.</param> + protected CmsSignedGenerator( + SecureRandom rand) + { + this.rand = rand; + } + + protected string GetEncOid( + AsymmetricKeyParameter key, + string digestOID) + { + string encOID = null; + + if (key is RsaKeyParameters) + { + if (!((RsaKeyParameters) key).IsPrivate) + throw new ArgumentException("Expected RSA private key"); + + encOID = EncryptionRsa; + } + else if (key is DsaPrivateKeyParameters) + { + if (!digestOID.Equals(DigestSha1)) + throw new ArgumentException("can't mix DSA with anything but SHA1"); + + encOID = EncryptionDsa; + } + else if (key is ECPrivateKeyParameters) + { + ECPrivateKeyParameters ecPrivKey = (ECPrivateKeyParameters) key; + string algName = ecPrivKey.AlgorithmName; + + if (algName == "ECGOST3410") + { + encOID = EncryptionECGost3410; + } + else + { + // TODO Should we insist on algName being one of "EC" or "ECDSA", as Java does? + encOID = (string) ecAlgorithms[digestOID]; + + if (encOID == null) + throw new ArgumentException("can't mix ECDSA with anything but SHA family digests"); + } + } + else if (key is Gost3410PrivateKeyParameters) + { + encOID = EncryptionGost3410; + } + else + { + throw new ArgumentException("Unknown algorithm in CmsSignedGenerator.GetEncOid"); + } + + return encOID; + } + + internal static AlgorithmIdentifier GetEncAlgorithmIdentifier( + DerObjectIdentifier encOid, + Asn1Encodable sigX509Parameters) + { + if (noParams.Contains(encOid.Id)) + { + return new AlgorithmIdentifier(encOid); + } + + return new AlgorithmIdentifier(encOid, sigX509Parameters); + } + + internal protected virtual IDictionary GetBaseParameters( + DerObjectIdentifier contentType, + AlgorithmIdentifier digAlgId, + byte[] hash) + { + IDictionary param = Platform.CreateHashtable(); + + if (contentType != null) + { + param[CmsAttributeTableParameter.ContentType] = contentType; + } + + param[CmsAttributeTableParameter.DigestAlgorithmIdentifier] = digAlgId; + param[CmsAttributeTableParameter.Digest] = hash.Clone(); + + return param; + } + + internal protected virtual Asn1Set GetAttributeSet( + Asn1.Cms.AttributeTable attr) + { + return attr == null + ? null + : new DerSet(attr.ToAsn1EncodableVector()); + } + + public void AddCertificates( + IX509Store certStore) + { + CollectionUtilities.AddRange(_certs, CmsUtilities.GetCertificatesFromStore(certStore)); + } + + public void AddCrls( + IX509Store crlStore) + { + CollectionUtilities.AddRange(_crls, CmsUtilities.GetCrlsFromStore(crlStore)); + } + + /** + * Add the attribute certificates contained in the passed in store to the + * generator. + * + * @param store a store of Version 2 attribute certificates + * @throws CmsException if an error occurse processing the store. + */ + public void AddAttributeCertificates( + IX509Store store) + { + try + { + foreach (IX509AttributeCertificate attrCert in store.GetMatches(null)) + { + _certs.Add(new DerTaggedObject(false, 2, + AttributeCertificate.GetInstance(Asn1Object.FromByteArray(attrCert.GetEncoded())))); + } + } + catch (Exception e) + { + throw new CmsException("error processing attribute certs", e); + } + } + + /** + * Add a store of precalculated signers to the generator. + * + * @param signerStore store of signers + */ + public void AddSigners( + SignerInformationStore signerStore) + { + foreach (SignerInformation o in signerStore.GetSigners()) + { + _signers.Add(o); + AddSignerCallback(o); + } + } + + /** + * Return a map of oids and byte arrays representing the digests calculated on the content during + * the last generate. + * + * @return a map of oids (as String objects) and byte[] representing digests. + */ + public IDictionary GetGeneratedDigests() + { + return Platform.CreateHashtable(_digests); + } + + internal virtual void AddSignerCallback( + SignerInformation si) + { + } + + internal static SignerIdentifier GetSignerIdentifier(X509Certificate cert) + { + return new SignerIdentifier(CmsUtilities.GetIssuerAndSerialNumber(cert)); + } + + internal static SignerIdentifier GetSignerIdentifier(byte[] subjectKeyIdentifier) + { + return new SignerIdentifier(new DerOctetString(subjectKeyIdentifier)); + } + } +} diff --git a/Crypto/src/cms/CMSSignedHelper.cs b/Crypto/src/cms/CMSSignedHelper.cs new file mode 100644 index 000000000..b3406fc06 --- /dev/null +++ b/Crypto/src/cms/CMSSignedHelper.cs @@ -0,0 +1,319 @@ +using System; +using System.Collections; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.CryptoPro; +using Org.BouncyCastle.Asn1.Eac; +using Org.BouncyCastle.Asn1.Iana; +using Org.BouncyCastle.Asn1.Misc; +using Org.BouncyCastle.Asn1.Nist; +using Org.BouncyCastle.Asn1.Oiw; +using Org.BouncyCastle.Asn1.Pkcs; +using Org.BouncyCastle.Asn1.TeleTrust; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Asn1.X9; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Security; +using Org.BouncyCastle.Security.Certificates; +using Org.BouncyCastle.Utilities; +using Org.BouncyCastle.X509; +using Org.BouncyCastle.X509.Store; + +namespace Org.BouncyCastle.Cms +{ + internal class CmsSignedHelper + { + internal static readonly CmsSignedHelper Instance = new CmsSignedHelper(); + + private static readonly IDictionary encryptionAlgs = Platform.CreateHashtable(); + private static readonly IDictionary digestAlgs = Platform.CreateHashtable(); + private static readonly IDictionary digestAliases = Platform.CreateHashtable(); + + private static void AddEntries(DerObjectIdentifier oid, string digest, string encryption) + { + string alias = oid.Id; + digestAlgs.Add(alias, digest); + encryptionAlgs.Add(alias, encryption); + } + + static CmsSignedHelper() + { + AddEntries(NistObjectIdentifiers.DsaWithSha224, "SHA224", "DSA"); + AddEntries(NistObjectIdentifiers.DsaWithSha256, "SHA256", "DSA"); + AddEntries(NistObjectIdentifiers.DsaWithSha384, "SHA384", "DSA"); + AddEntries(NistObjectIdentifiers.DsaWithSha512, "SHA512", "DSA"); + AddEntries(OiwObjectIdentifiers.DsaWithSha1, "SHA1", "DSA"); + AddEntries(OiwObjectIdentifiers.MD4WithRsa, "MD4", "RSA"); + AddEntries(OiwObjectIdentifiers.MD4WithRsaEncryption, "MD4", "RSA"); + AddEntries(OiwObjectIdentifiers.MD5WithRsa, "MD5", "RSA"); + AddEntries(OiwObjectIdentifiers.Sha1WithRsa, "SHA1", "RSA"); + AddEntries(PkcsObjectIdentifiers.MD2WithRsaEncryption, "MD2", "RSA"); + AddEntries(PkcsObjectIdentifiers.MD4WithRsaEncryption, "MD4", "RSA"); + AddEntries(PkcsObjectIdentifiers.MD5WithRsaEncryption, "MD5", "RSA"); + AddEntries(PkcsObjectIdentifiers.Sha1WithRsaEncryption, "SHA1", "RSA"); + AddEntries(PkcsObjectIdentifiers.Sha224WithRsaEncryption, "SHA224", "RSA"); + AddEntries(PkcsObjectIdentifiers.Sha256WithRsaEncryption, "SHA256", "RSA"); + AddEntries(PkcsObjectIdentifiers.Sha384WithRsaEncryption, "SHA384", "RSA"); + AddEntries(PkcsObjectIdentifiers.Sha512WithRsaEncryption, "SHA512", "RSA"); + AddEntries(X9ObjectIdentifiers.ECDsaWithSha1, "SHA1", "ECDSA"); + AddEntries(X9ObjectIdentifiers.ECDsaWithSha224, "SHA224", "ECDSA"); + AddEntries(X9ObjectIdentifiers.ECDsaWithSha256, "SHA256", "ECDSA"); + AddEntries(X9ObjectIdentifiers.ECDsaWithSha384, "SHA384", "ECDSA"); + AddEntries(X9ObjectIdentifiers.ECDsaWithSha512, "SHA512", "ECDSA"); + AddEntries(X9ObjectIdentifiers.IdDsaWithSha1, "SHA1", "DSA"); + AddEntries(EacObjectIdentifiers.id_TA_ECDSA_SHA_1, "SHA1", "ECDSA"); + AddEntries(EacObjectIdentifiers.id_TA_ECDSA_SHA_224, "SHA224", "ECDSA"); + AddEntries(EacObjectIdentifiers.id_TA_ECDSA_SHA_256, "SHA256", "ECDSA"); + AddEntries(EacObjectIdentifiers.id_TA_ECDSA_SHA_384, "SHA384", "ECDSA"); + AddEntries(EacObjectIdentifiers.id_TA_ECDSA_SHA_512, "SHA512", "ECDSA"); + AddEntries(EacObjectIdentifiers.id_TA_RSA_v1_5_SHA_1, "SHA1", "RSA"); + AddEntries(EacObjectIdentifiers.id_TA_RSA_v1_5_SHA_256, "SHA256", "RSA"); + AddEntries(EacObjectIdentifiers.id_TA_RSA_PSS_SHA_1, "SHA1", "RSAandMGF1"); + AddEntries(EacObjectIdentifiers.id_TA_RSA_PSS_SHA_256, "SHA256", "RSAandMGF1"); + + encryptionAlgs.Add(X9ObjectIdentifiers.IdDsa.Id, "DSA"); + encryptionAlgs.Add(PkcsObjectIdentifiers.RsaEncryption.Id, "RSA"); + encryptionAlgs.Add(TeleTrusTObjectIdentifiers.TeleTrusTRsaSignatureAlgorithm, "RSA"); + encryptionAlgs.Add(X509ObjectIdentifiers.IdEARsa.Id, "RSA"); + encryptionAlgs.Add(CmsSignedGenerator.EncryptionRsaPss, "RSAandMGF1"); + encryptionAlgs.Add(CryptoProObjectIdentifiers.GostR3410x94.Id, "GOST3410"); + encryptionAlgs.Add(CryptoProObjectIdentifiers.GostR3410x2001.Id, "ECGOST3410"); + encryptionAlgs.Add("1.3.6.1.4.1.5849.1.6.2", "ECGOST3410"); + encryptionAlgs.Add("1.3.6.1.4.1.5849.1.1.5", "GOST3410"); + + digestAlgs.Add(PkcsObjectIdentifiers.MD2.Id, "MD2"); + digestAlgs.Add(PkcsObjectIdentifiers.MD4.Id, "MD4"); + digestAlgs.Add(PkcsObjectIdentifiers.MD5.Id, "MD5"); + digestAlgs.Add(OiwObjectIdentifiers.IdSha1.Id, "SHA1"); + digestAlgs.Add(NistObjectIdentifiers.IdSha224.Id, "SHA224"); + digestAlgs.Add(NistObjectIdentifiers.IdSha256.Id, "SHA256"); + digestAlgs.Add(NistObjectIdentifiers.IdSha384.Id, "SHA384"); + digestAlgs.Add(NistObjectIdentifiers.IdSha512.Id, "SHA512"); + digestAlgs.Add(TeleTrusTObjectIdentifiers.RipeMD128.Id, "RIPEMD128"); + digestAlgs.Add(TeleTrusTObjectIdentifiers.RipeMD160.Id, "RIPEMD160"); + digestAlgs.Add(TeleTrusTObjectIdentifiers.RipeMD256.Id, "RIPEMD256"); + digestAlgs.Add(CryptoProObjectIdentifiers.GostR3411.Id, "GOST3411"); + digestAlgs.Add("1.3.6.1.4.1.5849.1.2.1", "GOST3411"); + + digestAliases.Add("SHA1", new string[] { "SHA-1" }); + digestAliases.Add("SHA224", new string[] { "SHA-224" }); + digestAliases.Add("SHA256", new string[] { "SHA-256" }); + digestAliases.Add("SHA384", new string[] { "SHA-384" }); + digestAliases.Add("SHA512", new string[] { "SHA-512" }); + } + + /** + * Return the digest algorithm using one of the standard JCA string + * representations rather than the algorithm identifier (if possible). + */ + internal string GetDigestAlgName( + string digestAlgOid) + { + string algName = (string)digestAlgs[digestAlgOid]; + + if (algName != null) + { + return algName; + } + + return digestAlgOid; + } + + internal string[] GetDigestAliases( + string algName) + { + string[] aliases = (string[]) digestAliases[algName]; + + return aliases == null ? new String[0] : (string[]) aliases.Clone(); + } + + /** + * Return the digest encryption algorithm using one of the standard + * JCA string representations rather than the algorithm identifier (if + * possible). + */ + internal string GetEncryptionAlgName( + string encryptionAlgOid) + { + string algName = (string) encryptionAlgs[encryptionAlgOid]; + + if (algName != null) + { + return algName; + } + + return encryptionAlgOid; + } + + internal IDigest GetDigestInstance( + string algorithm) + { + try + { + return DigestUtilities.GetDigest(algorithm); + } + catch (SecurityUtilityException e) + { + // This is probably superfluous on C#, since no provider infrastructure, + // assuming DigestUtilities already knows all the aliases + foreach (string alias in GetDigestAliases(algorithm)) + { + try { return DigestUtilities.GetDigest(alias); } + catch (SecurityUtilityException) {} + } + throw e; + } + } + + internal ISigner GetSignatureInstance( + string algorithm) + { + return SignerUtilities.GetSigner(algorithm); + } + + internal IX509Store CreateAttributeStore( + string type, + Asn1Set certSet) + { + IList certs = Platform.CreateArrayList(); + + if (certSet != null) + { + foreach (Asn1Encodable ae in certSet) + { + try + { + Asn1Object obj = ae.ToAsn1Object(); + + if (obj is Asn1TaggedObject) + { + Asn1TaggedObject tagged = (Asn1TaggedObject)obj; + + if (tagged.TagNo == 2) + { + certs.Add( + new X509V2AttributeCertificate( + Asn1Sequence.GetInstance(tagged, false).GetEncoded())); + } + } + } + catch (Exception ex) + { + throw new CmsException("can't re-encode attribute certificate!", ex); + } + } + } + + try + { + return X509StoreFactory.Create( + "AttributeCertificate/" + type, + new X509CollectionStoreParameters(certs)); + } + catch (ArgumentException e) + { + throw new CmsException("can't setup the X509Store", e); + } + } + + internal IX509Store CreateCertificateStore( + string type, + Asn1Set certSet) + { + IList certs = Platform.CreateArrayList(); + + if (certSet != null) + { + AddCertsFromSet(certs, certSet); + } + + try + { + return X509StoreFactory.Create( + "Certificate/" + type, + new X509CollectionStoreParameters(certs)); + } + catch (ArgumentException e) + { + throw new CmsException("can't setup the X509Store", e); + } + } + + internal IX509Store CreateCrlStore( + string type, + Asn1Set crlSet) + { + IList crls = Platform.CreateArrayList(); + + if (crlSet != null) + { + AddCrlsFromSet(crls, crlSet); + } + + try + { + return X509StoreFactory.Create( + "CRL/" + type, + new X509CollectionStoreParameters(crls)); + } + catch (ArgumentException e) + { + throw new CmsException("can't setup the X509Store", e); + } + } + + private void AddCertsFromSet( + IList certs, + Asn1Set certSet) + { + X509CertificateParser cf = new X509CertificateParser(); + + foreach (Asn1Encodable ae in certSet) + { + try + { + Asn1Object obj = ae.ToAsn1Object(); + + if (obj is Asn1Sequence) + { + // TODO Build certificate directly from sequence? + certs.Add(cf.ReadCertificate(obj.GetEncoded())); + } + } + catch (Exception ex) + { + throw new CmsException("can't re-encode certificate!", ex); + } + } + } + + private void AddCrlsFromSet( + IList crls, + Asn1Set crlSet) + { + X509CrlParser cf = new X509CrlParser(); + + foreach (Asn1Encodable ae in crlSet) + { + try + { + // TODO Build CRL directly from ae.ToAsn1Object()? + crls.Add(cf.ReadCrl(ae.GetEncoded())); + } + catch (Exception ex) + { + throw new CmsException("can't re-encode CRL!", ex); + } + } + } + + internal AlgorithmIdentifier FixAlgID( + AlgorithmIdentifier algId) + { + if (algId.Parameters == null) + return new AlgorithmIdentifier(algId.ObjectID, DerNull.Instance); + + return algId; + } + } +} diff --git a/Crypto/src/cms/CMSStreamException.cs b/Crypto/src/cms/CMSStreamException.cs new file mode 100644 index 000000000..1626fb8b4 --- /dev/null +++ b/Crypto/src/cms/CMSStreamException.cs @@ -0,0 +1,26 @@ +using System; +using System.IO; + +namespace Org.BouncyCastle.Cms +{ + public class CmsStreamException + : IOException + { + public CmsStreamException() + { + } + + public CmsStreamException( + string name) + : base(name) + { + } + + public CmsStreamException( + string name, + Exception e) + : base(name, e) + { + } + } +} diff --git a/Crypto/src/cms/CMSTypedStream.cs b/Crypto/src/cms/CMSTypedStream.cs new file mode 100644 index 000000000..576edf234 --- /dev/null +++ b/Crypto/src/cms/CMSTypedStream.cs @@ -0,0 +1,72 @@ +using System; +using System.IO; + +using Org.BouncyCastle.Asn1.Pkcs; +using Org.BouncyCastle.Asn1.Utilities; +using Org.BouncyCastle.Utilities.IO; + +namespace Org.BouncyCastle.Cms +{ + public class CmsTypedStream + { + private const int BufferSize = 32 * 1024; + + private readonly string _oid; + private readonly Stream _in; + + public CmsTypedStream( + Stream inStream) + : this(PkcsObjectIdentifiers.Data.Id, inStream, BufferSize) + { + } + + public CmsTypedStream( + string oid, + Stream inStream) + : this(oid, inStream, BufferSize) + { + } + + public CmsTypedStream( + string oid, + Stream inStream, + int bufSize) + { + _oid = oid; +#if NETCF_1_0 || NETCF_2_0 || SILVERLIGHT || PORTABLE + _in = new FullReaderStream(inStream); +#else + _in = new FullReaderStream(new BufferedStream(inStream, bufSize)); +#endif + } + + public string ContentType + { + get { return _oid; } + } + + public Stream ContentStream + { + get { return _in; } + } + + public void Drain() + { + Streams.Drain(_in); + _in.Dispose(); + } + + private class FullReaderStream : FilterStream + { + internal FullReaderStream(Stream input) + : base(input) + { + } + + public override int Read(byte[] buf, int off, int len) + { + return Streams.ReadFully(base.s, buf, off, len); + } + } + } +} diff --git a/Crypto/src/cms/CMSUtils.cs b/Crypto/src/cms/CMSUtils.cs new file mode 100644 index 000000000..95d710607 --- /dev/null +++ b/Crypto/src/cms/CMSUtils.cs @@ -0,0 +1,186 @@ +using System; +using System.Collections; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Security.Certificates; +using Org.BouncyCastle.Utilities; +using Org.BouncyCastle.Utilities.IO; +using Org.BouncyCastle.X509; +using Org.BouncyCastle.X509.Store; + +namespace Org.BouncyCastle.Cms +{ + internal class CmsUtilities + { + // TODO Is there a .NET equivalent to this? +// private static readonly Runtime RUNTIME = Runtime.getRuntime(); + + internal static int MaximumMemory + { + get + { + // TODO Is there a .NET equivalent to this? + long maxMem = int.MaxValue;//RUNTIME.maxMemory(); + + if (maxMem > int.MaxValue) + { + return int.MaxValue; + } + + return (int)maxMem; + } + } + + internal static ContentInfo ReadContentInfo( + byte[] input) + { + // enforce limit checking as from a byte array + return ReadContentInfo(new Asn1InputStream(input)); + } + + internal static ContentInfo ReadContentInfo( + Stream input) + { + // enforce some limit checking + return ReadContentInfo(new Asn1InputStream(input, MaximumMemory)); + } + + private static ContentInfo ReadContentInfo( + Asn1InputStream aIn) + { + try + { + return ContentInfo.GetInstance(aIn.ReadObject()); + } + catch (IOException e) + { + throw new CmsException("IOException reading content.", e); + } + catch (InvalidCastException e) + { + throw new CmsException("Malformed content.", e); + } + catch (ArgumentException e) + { + throw new CmsException("Malformed content.", e); + } + } + + public static byte[] StreamToByteArray( + Stream inStream) + { + return Streams.ReadAll(inStream); + } + + public static byte[] StreamToByteArray( + Stream inStream, + int limit) + { + return Streams.ReadAllLimited(inStream, limit); + } + + public static IList GetCertificatesFromStore( + IX509Store certStore) + { + try + { + IList certs = Platform.CreateArrayList(); + + if (certStore != null) + { + foreach (X509Certificate c in certStore.GetMatches(null)) + { + certs.Add( + X509CertificateStructure.GetInstance( + Asn1Object.FromByteArray(c.GetEncoded()))); + } + } + + return certs; + } + catch (CertificateEncodingException e) + { + throw new CmsException("error encoding certs", e); + } + catch (Exception e) + { + throw new CmsException("error processing certs", e); + } + } + + public static IList GetCrlsFromStore( + IX509Store crlStore) + { + try + { + IList crls = Platform.CreateArrayList(); + + if (crlStore != null) + { + foreach (X509Crl c in crlStore.GetMatches(null)) + { + crls.Add( + CertificateList.GetInstance( + Asn1Object.FromByteArray(c.GetEncoded()))); + } + } + + return crls; + } + catch (CrlException e) + { + throw new CmsException("error encoding crls", e); + } + catch (Exception e) + { + throw new CmsException("error processing crls", e); + } + } + + public static Asn1Set CreateBerSetFromList( + IList berObjects) + { + Asn1EncodableVector v = new Asn1EncodableVector(); + + foreach (Asn1Encodable ae in berObjects) + { + v.Add(ae); + } + + return new BerSet(v); + } + + public static Asn1Set CreateDerSetFromList( + IList derObjects) + { + Asn1EncodableVector v = new Asn1EncodableVector(); + + foreach (Asn1Encodable ae in derObjects) + { + v.Add(ae); + } + + return new DerSet(v); + } + + internal static Stream CreateBerOctetOutputStream(Stream s, int tagNo, bool isExplicit, int bufferSize) + { + BerOctetStringGenerator octGen = new BerOctetStringGenerator(s, tagNo, isExplicit); + return octGen.GetOctetOutputStream(bufferSize); + } + + internal static TbsCertificateStructure GetTbsCertificateStructure(X509Certificate cert) + { + return TbsCertificateStructure.GetInstance(Asn1Object.FromByteArray(cert.GetTbsCertificate())); + } + + internal static IssuerAndSerialNumber GetIssuerAndSerialNumber(X509Certificate cert) + { + TbsCertificateStructure tbsCert = GetTbsCertificateStructure(cert); + return new IssuerAndSerialNumber(tbsCert.Issuer, tbsCert.SerialNumber.Value); + } + } +} diff --git a/Crypto/src/cms/CounterSignatureDigestCalculator.cs b/Crypto/src/cms/CounterSignatureDigestCalculator.cs new file mode 100644 index 000000000..6f8bf65a2 --- /dev/null +++ b/Crypto/src/cms/CounterSignatureDigestCalculator.cs @@ -0,0 +1,28 @@ +using System; + +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Security; + +namespace Org.BouncyCastle.Cms +{ + internal class CounterSignatureDigestCalculator + : IDigestCalculator + { + private readonly string alg; + private readonly byte[] data; + + internal CounterSignatureDigestCalculator( + string alg, + byte[] data) + { + this.alg = alg; + this.data = data; + } + + public byte[] GetDigest() + { + IDigest digest = CmsSignedHelper.Instance.GetDigestInstance(alg); + return DigestUtilities.DoFinal(digest, data); + } + } +} diff --git a/Crypto/src/cms/DefaultAuthenticatedAttributeTableGenerator.cs b/Crypto/src/cms/DefaultAuthenticatedAttributeTableGenerator.cs new file mode 100644 index 000000000..d49b1d9d2 --- /dev/null +++ b/Crypto/src/cms/DefaultAuthenticatedAttributeTableGenerator.cs @@ -0,0 +1,90 @@ +using System; +using System.Collections; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Utilities; + +namespace Org.BouncyCastle.Cms +{ + /** + * Default authenticated attributes generator. + */ + public class DefaultAuthenticatedAttributeTableGenerator + : CmsAttributeTableGenerator + { + private readonly IDictionary table; + + /** + * Initialise to use all defaults + */ + public DefaultAuthenticatedAttributeTableGenerator() + { + table = Platform.CreateHashtable(); + } + + /** + * Initialise with some extra attributes or overrides. + * + * @param attributeTable initial attribute table to use. + */ + public DefaultAuthenticatedAttributeTableGenerator( + AttributeTable attributeTable) + { + if (attributeTable != null) + { + table = attributeTable.ToDictionary(); + } + else + { + table = Platform.CreateHashtable(); + } + } + + /** + * Create a standard attribute table from the passed in parameters - this will + * normally include contentType and messageDigest. If the constructor + * using an AttributeTable was used, entries in it for contentType and + * messageDigest will override the generated ones. + * + * @param parameters source parameters for table generation. + * + * @return a filled in IDictionary of attributes. + */ + protected virtual IDictionary CreateStandardAttributeTable( + IDictionary parameters) + { + IDictionary std = Platform.CreateHashtable(table); + + if (!std.Contains(CmsAttributes.ContentType)) + { + DerObjectIdentifier contentType = (DerObjectIdentifier) + parameters[CmsAttributeTableParameter.ContentType]; + Asn1.Cms.Attribute attr = new Asn1.Cms.Attribute(CmsAttributes.ContentType, + new DerSet(contentType)); + std[attr.AttrType] = attr; + } + + if (!std.Contains(CmsAttributes.MessageDigest)) + { + byte[] messageDigest = (byte[])parameters[CmsAttributeTableParameter.Digest]; + Asn1.Cms.Attribute attr = new Asn1.Cms.Attribute(CmsAttributes.MessageDigest, + new DerSet(new DerOctetString(messageDigest))); + std[attr.AttrType] = attr; + } + + return std; + } + + /** + * @param parameters source parameters + * @return the populated attribute table + */ + public virtual AttributeTable GetAttributes( + IDictionary parameters) + { + IDictionary table = CreateStandardAttributeTable(parameters); + return new AttributeTable(table); + } + } +} diff --git a/Crypto/src/cms/DefaultSignedAttributeTableGenerator.cs b/Crypto/src/cms/DefaultSignedAttributeTableGenerator.cs new file mode 100644 index 000000000..0e93392d9 --- /dev/null +++ b/Crypto/src/cms/DefaultSignedAttributeTableGenerator.cs @@ -0,0 +1,124 @@ +using System; +using System.Collections; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Utilities; + +namespace Org.BouncyCastle.Cms +{ + /** + * Default signed attributes generator. + */ + public class DefaultSignedAttributeTableGenerator + : CmsAttributeTableGenerator + { + private readonly IDictionary table; + + /** + * Initialise to use all defaults + */ + public DefaultSignedAttributeTableGenerator() + { + table = Platform.CreateHashtable(); + } + + /** + * Initialise with some extra attributes or overrides. + * + * @param attributeTable initial attribute table to use. + */ + public DefaultSignedAttributeTableGenerator( + AttributeTable attributeTable) + { + if (attributeTable != null) + { + table = attributeTable.ToDictionary(); + } + else + { + table = Platform.CreateHashtable(); + } + } + +#if (SILVERLIGHT || PORTABLE) + /** + * Create a standard attribute table from the passed in parameters - this will + * normally include contentType, signingTime, and messageDigest. If the constructor + * using an AttributeTable was used, entries in it for contentType, signingTime, and + * messageDigest will override the generated ones. + * + * @param parameters source parameters for table generation. + * + * @return a filled in Hashtable of attributes. + */ + protected virtual IDictionary createStandardAttributeTable( + IDictionary parameters) + { + IDictionary std = Platform.CreateHashtable(table); + DoCreateStandardAttributeTable(parameters, std); + return std; + } +#else + /** + * Create a standard attribute table from the passed in parameters - this will + * normally include contentType, signingTime, and messageDigest. If the constructor + * using an AttributeTable was used, entries in it for contentType, signingTime, and + * messageDigest will override the generated ones. + * + * @param parameters source parameters for table generation. + * + * @return a filled in Hashtable of attributes. + */ + protected virtual Hashtable createStandardAttributeTable( + IDictionary parameters) + { + Hashtable std = new Hashtable(table); + DoCreateStandardAttributeTable(parameters, std); + return std; + } +#endif + + private void DoCreateStandardAttributeTable(IDictionary parameters, IDictionary std) + { + // contentType will be absent if we're trying to generate a counter signature. + if (parameters.Contains(CmsAttributeTableParameter.ContentType)) + { + if (!std.Contains(CmsAttributes.ContentType)) + { + DerObjectIdentifier contentType = (DerObjectIdentifier) + parameters[CmsAttributeTableParameter.ContentType]; + Asn1.Cms.Attribute attr = new Asn1.Cms.Attribute(CmsAttributes.ContentType, + new DerSet(contentType)); + std[attr.AttrType] = attr; + } + } + + if (!std.Contains(CmsAttributes.SigningTime)) + { + Asn1.Cms.Attribute attr = new Asn1.Cms.Attribute(CmsAttributes.SigningTime, + new DerSet(new Time(DateTime.UtcNow))); + std[attr.AttrType] = attr; + } + + if (!std.Contains(CmsAttributes.MessageDigest)) + { + byte[] messageDigest = (byte[])parameters[CmsAttributeTableParameter.Digest]; + Asn1.Cms.Attribute attr = new Asn1.Cms.Attribute(CmsAttributes.MessageDigest, + new DerSet(new DerOctetString(messageDigest))); + std[attr.AttrType] = attr; + } + } + + /** + * @param parameters source parameters + * @return the populated attribute table + */ + public virtual AttributeTable GetAttributes( + IDictionary parameters) + { + IDictionary table = createStandardAttributeTable(parameters); + return new AttributeTable(table); + } + } +} diff --git a/Crypto/src/cms/DigOutputStream.cs b/Crypto/src/cms/DigOutputStream.cs new file mode 100644 index 000000000..103b45cac --- /dev/null +++ b/Crypto/src/cms/DigOutputStream.cs @@ -0,0 +1,28 @@ +using System; + +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Utilities.IO; + +namespace Org.BouncyCastle.Cms +{ + internal class DigOutputStream + : BaseOutputStream + { + private readonly IDigest dig; + + internal DigOutputStream(IDigest dig) + { + this.dig = dig; + } + + public override void WriteByte(byte b) + { + dig.Update(b); + } + + public override void Write(byte[] b, int off, int len) + { + dig.BlockUpdate(b, off, len); + } + } +} diff --git a/Crypto/src/cms/IDigestCalculator.cs b/Crypto/src/cms/IDigestCalculator.cs new file mode 100644 index 000000000..3661e4023 --- /dev/null +++ b/Crypto/src/cms/IDigestCalculator.cs @@ -0,0 +1,9 @@ +using System; + +namespace Org.BouncyCastle.Cms +{ + internal interface IDigestCalculator + { + byte[] GetDigest(); + } +} diff --git a/Crypto/src/cms/KEKRecipientInfoGenerator.cs b/Crypto/src/cms/KEKRecipientInfoGenerator.cs new file mode 100644 index 000000000..a9bedade6 --- /dev/null +++ b/Crypto/src/cms/KEKRecipientInfoGenerator.cs @@ -0,0 +1,137 @@ +using System; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.Kisa; +using Org.BouncyCastle.Asn1.Nist; +using Org.BouncyCastle.Asn1.Ntt; +using Org.BouncyCastle.Asn1.Pkcs; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.Parameters; +using Org.BouncyCastle.Security; + +namespace Org.BouncyCastle.Cms +{ + internal class KekRecipientInfoGenerator : RecipientInfoGenerator + { + private static readonly CmsEnvelopedHelper Helper = CmsEnvelopedHelper.Instance; + + private KeyParameter keyEncryptionKey; + // TODO Can get this from keyEncryptionKey? + private string keyEncryptionKeyOID; + private KekIdentifier kekIdentifier; + + // Derived + private AlgorithmIdentifier keyEncryptionAlgorithm; + + internal KekRecipientInfoGenerator() + { + } + + internal KekIdentifier KekIdentifier + { + set { this.kekIdentifier = value; } + } + + internal KeyParameter KeyEncryptionKey + { + set + { + this.keyEncryptionKey = value; + this.keyEncryptionAlgorithm = DetermineKeyEncAlg(keyEncryptionKeyOID, keyEncryptionKey); + } + } + + internal string KeyEncryptionKeyOID + { + set { this.keyEncryptionKeyOID = value; } + } + + public RecipientInfo Generate(KeyParameter contentEncryptionKey, SecureRandom random) + { + byte[] keyBytes = contentEncryptionKey.GetKey(); + + IWrapper keyWrapper = Helper.CreateWrapper(keyEncryptionAlgorithm.ObjectID.Id); + keyWrapper.Init(true, new ParametersWithRandom(keyEncryptionKey, random)); + Asn1OctetString encryptedKey = new DerOctetString( + keyWrapper.Wrap(keyBytes, 0, keyBytes.Length)); + + return new RecipientInfo(new KekRecipientInfo(kekIdentifier, keyEncryptionAlgorithm, encryptedKey)); + } + + private static AlgorithmIdentifier DetermineKeyEncAlg( + string algorithm, KeyParameter key) + { + if (algorithm.StartsWith("DES")) + { + return new AlgorithmIdentifier( + PkcsObjectIdentifiers.IdAlgCms3DesWrap, + DerNull.Instance); + } + else if (algorithm.StartsWith("RC2")) + { + return new AlgorithmIdentifier( + PkcsObjectIdentifiers.IdAlgCmsRC2Wrap, + new DerInteger(58)); + } + else if (algorithm.StartsWith("AES")) + { + int length = key.GetKey().Length * 8; + DerObjectIdentifier wrapOid; + + if (length == 128) + { + wrapOid = NistObjectIdentifiers.IdAes128Wrap; + } + else if (length == 192) + { + wrapOid = NistObjectIdentifiers.IdAes192Wrap; + } + else if (length == 256) + { + wrapOid = NistObjectIdentifiers.IdAes256Wrap; + } + else + { + throw new ArgumentException("illegal keysize in AES"); + } + + return new AlgorithmIdentifier(wrapOid); // parameters absent + } + else if (algorithm.StartsWith("SEED")) + { + // parameters absent + return new AlgorithmIdentifier(KisaObjectIdentifiers.IdNpkiAppCmsSeedWrap); + } + else if (algorithm.StartsWith("CAMELLIA")) + { + int length = key.GetKey().Length * 8; + DerObjectIdentifier wrapOid; + + if (length == 128) + { + wrapOid = NttObjectIdentifiers.IdCamellia128Wrap; + } + else if (length == 192) + { + wrapOid = NttObjectIdentifiers.IdCamellia192Wrap; + } + else if (length == 256) + { + wrapOid = NttObjectIdentifiers.IdCamellia256Wrap; + } + else + { + throw new ArgumentException("illegal keysize in Camellia"); + } + + return new AlgorithmIdentifier(wrapOid); // parameters must be absent + } + else + { + throw new ArgumentException("unknown algorithm"); + } + } + } +} diff --git a/Crypto/src/cms/KEKRecipientInformation.cs b/Crypto/src/cms/KEKRecipientInformation.cs new file mode 100644 index 000000000..f960197d6 --- /dev/null +++ b/Crypto/src/cms/KEKRecipientInformation.cs @@ -0,0 +1,62 @@ +using System; +using System.IO; + +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.Parameters; +using Org.BouncyCastle.Security; + +namespace Org.BouncyCastle.Cms +{ + /** + * the RecipientInfo class for a recipient who has been sent a message + * encrypted using a secret key known to the other side. + */ + public class KekRecipientInformation + : RecipientInformation + { + private KekRecipientInfo info; + + internal KekRecipientInformation( + KekRecipientInfo info, + CmsSecureReadable secureReadable) + : base(info.KeyEncryptionAlgorithm, secureReadable) + { + this.info = info; + this.rid = new RecipientID(); + + KekIdentifier kekId = info.KekID; + + rid.KeyIdentifier = kekId.KeyIdentifier.GetOctets(); + } + + /** + * decrypt the content and return an input stream. + */ + public override CmsTypedStream GetContentStream( + ICipherParameters key) + { + try + { + byte[] encryptedKey = info.EncryptedKey.GetOctets(); + IWrapper keyWrapper = WrapperUtilities.GetWrapper(keyEncAlg.ObjectID.Id); + + keyWrapper.Init(false, key); + + KeyParameter sKey = ParameterUtilities.CreateKeyParameter( + GetContentAlgorithmName(), keyWrapper.Unwrap(encryptedKey, 0, encryptedKey.Length)); + + return GetContentFromSessionKey(sKey); + } + catch (SecurityUtilityException e) + { + throw new CmsException("couldn't create cipher.", e); + } + catch (InvalidKeyException e) + { + throw new CmsException("key invalid in message.", e); + } + } + } +} diff --git a/Crypto/src/cms/KeyAgreeRecipientInfoGenerator.cs b/Crypto/src/cms/KeyAgreeRecipientInfoGenerator.cs new file mode 100644 index 000000000..4fafb7c6e --- /dev/null +++ b/Crypto/src/cms/KeyAgreeRecipientInfoGenerator.cs @@ -0,0 +1,171 @@ +using System; +using System.Collections; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.Cms.Ecc; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Asn1.X9; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.Parameters; +using Org.BouncyCastle.Math; +using Org.BouncyCastle.Security; +using Org.BouncyCastle.Utilities; +using Org.BouncyCastle.X509; + +namespace Org.BouncyCastle.Cms +{ + internal class KeyAgreeRecipientInfoGenerator : RecipientInfoGenerator + { + private static readonly CmsEnvelopedHelper Helper = CmsEnvelopedHelper.Instance; + + private DerObjectIdentifier keyAgreementOID; + private DerObjectIdentifier keyEncryptionOID; + private IList recipientCerts; + private AsymmetricCipherKeyPair senderKeyPair; + + internal KeyAgreeRecipientInfoGenerator() + { + } + + internal DerObjectIdentifier KeyAgreementOID + { + set { this.keyAgreementOID = value; } + } + + internal DerObjectIdentifier KeyEncryptionOID + { + set { this.keyEncryptionOID = value; } + } + + internal ICollection RecipientCerts + { + set { this.recipientCerts = Platform.CreateArrayList(value); } + } + + internal AsymmetricCipherKeyPair SenderKeyPair + { + set { this.senderKeyPair = value; } + } + + public RecipientInfo Generate(KeyParameter contentEncryptionKey, SecureRandom random) + { + byte[] keyBytes = contentEncryptionKey.GetKey(); + + AsymmetricKeyParameter senderPublicKey = senderKeyPair.Public; + ICipherParameters senderPrivateParams = senderKeyPair.Private; + + + OriginatorIdentifierOrKey originator; + try + { + originator = new OriginatorIdentifierOrKey( + CreateOriginatorPublicKey(senderPublicKey)); + } + catch (IOException e) + { + throw new InvalidKeyException("cannot extract originator public key: " + e); + } + + + Asn1OctetString ukm = null; + if (keyAgreementOID.Id.Equals(CmsEnvelopedGenerator.ECMqvSha1Kdf)) + { + try + { + IAsymmetricCipherKeyPairGenerator ephemKPG = + GeneratorUtilities.GetKeyPairGenerator(keyAgreementOID); + ephemKPG.Init( + ((ECPublicKeyParameters)senderPublicKey).CreateKeyGenerationParameters(random)); + + AsymmetricCipherKeyPair ephemKP = ephemKPG.GenerateKeyPair(); + + ukm = new DerOctetString( + new MQVuserKeyingMaterial( + CreateOriginatorPublicKey(ephemKP.Public), null)); + + senderPrivateParams = new MqvPrivateParameters( + (ECPrivateKeyParameters)senderPrivateParams, + (ECPrivateKeyParameters)ephemKP.Private, + (ECPublicKeyParameters)ephemKP.Public); + } + catch (IOException e) + { + throw new InvalidKeyException("cannot extract MQV ephemeral public key: " + e); + } + catch (SecurityUtilityException e) + { + throw new InvalidKeyException("cannot determine MQV ephemeral key pair parameters from public key: " + e); + } + } + + + DerSequence paramSeq = new DerSequence( + keyEncryptionOID, + DerNull.Instance); + AlgorithmIdentifier keyEncAlg = new AlgorithmIdentifier(keyAgreementOID, paramSeq); + + + Asn1EncodableVector recipientEncryptedKeys = new Asn1EncodableVector(); + foreach (X509Certificate recipientCert in recipientCerts) + { + TbsCertificateStructure tbsCert; + try + { + tbsCert = TbsCertificateStructure.GetInstance( + Asn1Object.FromByteArray(recipientCert.GetTbsCertificate())); + } + catch (Exception) + { + throw new ArgumentException("can't extract TBS structure from certificate"); + } + + // TODO Should there be a SubjectKeyIdentifier-based alternative? + IssuerAndSerialNumber issuerSerial = new IssuerAndSerialNumber( + tbsCert.Issuer, tbsCert.SerialNumber.Value); + KeyAgreeRecipientIdentifier karid = new KeyAgreeRecipientIdentifier(issuerSerial); + + ICipherParameters recipientPublicParams = recipientCert.GetPublicKey(); + if (keyAgreementOID.Id.Equals(CmsEnvelopedGenerator.ECMqvSha1Kdf)) + { + recipientPublicParams = new MqvPublicParameters( + (ECPublicKeyParameters)recipientPublicParams, + (ECPublicKeyParameters)recipientPublicParams); + } + + // Use key agreement to choose a wrap key for this recipient + IBasicAgreement keyAgreement = AgreementUtilities.GetBasicAgreementWithKdf( + keyAgreementOID, keyEncryptionOID.Id); + keyAgreement.Init(new ParametersWithRandom(senderPrivateParams, random)); + BigInteger agreedValue = keyAgreement.CalculateAgreement(recipientPublicParams); + + int keyEncryptionKeySize = GeneratorUtilities.GetDefaultKeySize(keyEncryptionOID) / 8; + byte[] keyEncryptionKeyBytes = X9IntegerConverter.IntegerToBytes(agreedValue, keyEncryptionKeySize); + KeyParameter keyEncryptionKey = ParameterUtilities.CreateKeyParameter( + keyEncryptionOID, keyEncryptionKeyBytes); + + // Wrap the content encryption key with the agreement key + IWrapper keyWrapper = Helper.CreateWrapper(keyEncryptionOID.Id); + keyWrapper.Init(true, new ParametersWithRandom(keyEncryptionKey, random)); + byte[] encryptedKeyBytes = keyWrapper.Wrap(keyBytes, 0, keyBytes.Length); + + Asn1OctetString encryptedKey = new DerOctetString(encryptedKeyBytes); + + recipientEncryptedKeys.Add(new RecipientEncryptedKey(karid, encryptedKey)); + } + + return new RecipientInfo(new KeyAgreeRecipientInfo(originator, ukm, keyEncAlg, + new DerSequence(recipientEncryptedKeys))); + } + + private static OriginatorPublicKey CreateOriginatorPublicKey( + AsymmetricKeyParameter publicKey) + { + SubjectPublicKeyInfo spki = SubjectPublicKeyInfoFactory.CreateSubjectPublicKeyInfo(publicKey); + return new OriginatorPublicKey( + new AlgorithmIdentifier(spki.AlgorithmID.ObjectID, DerNull.Instance), + spki.PublicKeyData.GetBytes()); + } + } +} diff --git a/Crypto/src/cms/KeyAgreeRecipientInformation.cs b/Crypto/src/cms/KeyAgreeRecipientInformation.cs new file mode 100644 index 000000000..38a94b0a4 --- /dev/null +++ b/Crypto/src/cms/KeyAgreeRecipientInformation.cs @@ -0,0 +1,226 @@ +using System; +using System.Collections; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.Cms.Ecc; +using Org.BouncyCastle.Asn1.Pkcs; +using Org.BouncyCastle.Asn1.Utilities; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Asn1.X9; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.Parameters; +using Org.BouncyCastle.Math; +using Org.BouncyCastle.Pkcs; +using Org.BouncyCastle.Security; +using Org.BouncyCastle.X509; + +namespace Org.BouncyCastle.Cms +{ + /** + * the RecipientInfo class for a recipient who has been sent a message + * encrypted using key agreement. + */ + public class KeyAgreeRecipientInformation + : RecipientInformation + { + private KeyAgreeRecipientInfo info; + private Asn1OctetString encryptedKey; + + internal static void ReadRecipientInfo(IList infos, KeyAgreeRecipientInfo info, + CmsSecureReadable secureReadable) + { + try + { + foreach (Asn1Encodable rek in info.RecipientEncryptedKeys) + { + RecipientEncryptedKey id = RecipientEncryptedKey.GetInstance(rek.ToAsn1Object()); + + RecipientID rid = new RecipientID(); + + Asn1.Cms.KeyAgreeRecipientIdentifier karid = id.Identifier; + + Asn1.Cms.IssuerAndSerialNumber iAndSN = karid.IssuerAndSerialNumber; + if (iAndSN != null) + { + rid.Issuer = iAndSN.Name; + rid.SerialNumber = iAndSN.SerialNumber.Value; + } + else + { + Asn1.Cms.RecipientKeyIdentifier rKeyID = karid.RKeyID; + + // Note: 'date' and 'other' fields of RecipientKeyIdentifier appear to be only informational + + rid.SubjectKeyIdentifier = rKeyID.SubjectKeyIdentifier.GetOctets(); + } + + infos.Add(new KeyAgreeRecipientInformation(info, rid, id.EncryptedKey, + secureReadable)); + } + } + catch (IOException e) + { + throw new ArgumentException("invalid rid in KeyAgreeRecipientInformation", e); + } + } + + internal KeyAgreeRecipientInformation( + KeyAgreeRecipientInfo info, + RecipientID rid, + Asn1OctetString encryptedKey, + CmsSecureReadable secureReadable) + : base(info.KeyEncryptionAlgorithm, secureReadable) + { + this.info = info; + this.rid = rid; + this.encryptedKey = encryptedKey; + } + + private AsymmetricKeyParameter GetSenderPublicKey( + AsymmetricKeyParameter receiverPrivateKey, + OriginatorIdentifierOrKey originator) + { + OriginatorPublicKey opk = originator.OriginatorPublicKey; + if (opk != null) + { + return GetPublicKeyFromOriginatorPublicKey(receiverPrivateKey, opk); + } + + OriginatorID origID = new OriginatorID(); + + Asn1.Cms.IssuerAndSerialNumber iAndSN = originator.IssuerAndSerialNumber; + if (iAndSN != null) + { + origID.Issuer = iAndSN.Name; + origID.SerialNumber = iAndSN.SerialNumber.Value; + } + else + { + SubjectKeyIdentifier ski = originator.SubjectKeyIdentifier; + + origID.SubjectKeyIdentifier = ski.GetKeyIdentifier(); + } + + return GetPublicKeyFromOriginatorID(origID); + } + + private AsymmetricKeyParameter GetPublicKeyFromOriginatorPublicKey( + AsymmetricKeyParameter receiverPrivateKey, + OriginatorPublicKey originatorPublicKey) + { + PrivateKeyInfo privInfo = PrivateKeyInfoFactory.CreatePrivateKeyInfo(receiverPrivateKey); + SubjectPublicKeyInfo pubInfo = new SubjectPublicKeyInfo( + privInfo.AlgorithmID, + originatorPublicKey.PublicKey.GetBytes()); + return PublicKeyFactory.CreateKey(pubInfo); + } + + private AsymmetricKeyParameter GetPublicKeyFromOriginatorID( + OriginatorID origID) + { + // TODO Support all alternatives for OriginatorIdentifierOrKey + // see RFC 3852 6.2.2 + throw new CmsException("No support for 'originator' as IssuerAndSerialNumber or SubjectKeyIdentifier"); + } + + private KeyParameter CalculateAgreedWrapKey( + string wrapAlg, + AsymmetricKeyParameter senderPublicKey, + AsymmetricKeyParameter receiverPrivateKey) + { + DerObjectIdentifier agreeAlgID = keyEncAlg.ObjectID; + + ICipherParameters senderPublicParams = senderPublicKey; + ICipherParameters receiverPrivateParams = receiverPrivateKey; + + if (agreeAlgID.Id.Equals(CmsEnvelopedGenerator.ECMqvSha1Kdf)) + { + byte[] ukmEncoding = info.UserKeyingMaterial.GetOctets(); + MQVuserKeyingMaterial ukm = MQVuserKeyingMaterial.GetInstance( + Asn1Object.FromByteArray(ukmEncoding)); + + AsymmetricKeyParameter ephemeralKey = GetPublicKeyFromOriginatorPublicKey( + receiverPrivateKey, ukm.EphemeralPublicKey); + + senderPublicParams = new MqvPublicParameters( + (ECPublicKeyParameters)senderPublicParams, + (ECPublicKeyParameters)ephemeralKey); + receiverPrivateParams = new MqvPrivateParameters( + (ECPrivateKeyParameters)receiverPrivateParams, + (ECPrivateKeyParameters)receiverPrivateParams); + } + + IBasicAgreement agreement = AgreementUtilities.GetBasicAgreementWithKdf( + agreeAlgID, wrapAlg); + agreement.Init(receiverPrivateParams); + BigInteger agreedValue = agreement.CalculateAgreement(senderPublicParams); + + int wrapKeySize = GeneratorUtilities.GetDefaultKeySize(wrapAlg) / 8; + byte[] wrapKeyBytes = X9IntegerConverter.IntegerToBytes(agreedValue, wrapKeySize); + return ParameterUtilities.CreateKeyParameter(wrapAlg, wrapKeyBytes); + } + + private KeyParameter UnwrapSessionKey( + string wrapAlg, + KeyParameter agreedKey) + { + byte[] encKeyOctets = encryptedKey.GetOctets(); + + IWrapper keyCipher = WrapperUtilities.GetWrapper(wrapAlg); + keyCipher.Init(false, agreedKey); + byte[] sKeyBytes = keyCipher.Unwrap(encKeyOctets, 0, encKeyOctets.Length); + return ParameterUtilities.CreateKeyParameter(GetContentAlgorithmName(), sKeyBytes); + } + + internal KeyParameter GetSessionKey( + AsymmetricKeyParameter receiverPrivateKey) + { + try + { + string wrapAlg = DerObjectIdentifier.GetInstance( + Asn1Sequence.GetInstance(keyEncAlg.Parameters)[0]).Id; + + AsymmetricKeyParameter senderPublicKey = GetSenderPublicKey( + receiverPrivateKey, info.Originator); + + KeyParameter agreedWrapKey = CalculateAgreedWrapKey(wrapAlg, + senderPublicKey, receiverPrivateKey); + + return UnwrapSessionKey(wrapAlg, agreedWrapKey); + } + catch (SecurityUtilityException e) + { + throw new CmsException("couldn't create cipher.", e); + } + catch (InvalidKeyException e) + { + throw new CmsException("key invalid in message.", e); + } + catch (Exception e) + { + throw new CmsException("originator key invalid.", e); + } + } + + /** + * decrypt the content and return an input stream. + */ + public override CmsTypedStream GetContentStream( + ICipherParameters key) + { + if (!(key is AsymmetricKeyParameter)) + throw new ArgumentException("KeyAgreement requires asymmetric key", "key"); + + AsymmetricKeyParameter receiverPrivateKey = (AsymmetricKeyParameter) key; + + if (!receiverPrivateKey.IsPrivate) + throw new ArgumentException("Expected private key", "key"); + + KeyParameter sKey = GetSessionKey(receiverPrivateKey); + + return GetContentFromSessionKey(sKey); + } + } +} diff --git a/Crypto/src/cms/KeyTransRecipientInfoGenerator.cs b/Crypto/src/cms/KeyTransRecipientInfoGenerator.cs new file mode 100644 index 000000000..0992e6da6 --- /dev/null +++ b/Crypto/src/cms/KeyTransRecipientInfoGenerator.cs @@ -0,0 +1,87 @@ +using System; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.Parameters; +using Org.BouncyCastle.Security; +using Org.BouncyCastle.X509; + +namespace Org.BouncyCastle.Cms +{ + internal class KeyTransRecipientInfoGenerator : RecipientInfoGenerator + { + private static readonly CmsEnvelopedHelper Helper = CmsEnvelopedHelper.Instance; + + private TbsCertificateStructure recipientTbsCert; + private AsymmetricKeyParameter recipientPublicKey; + private Asn1OctetString subjectKeyIdentifier; + + // Derived fields + private SubjectPublicKeyInfo info; + + internal KeyTransRecipientInfoGenerator() + { + } + + internal X509Certificate RecipientCert + { + set + { + this.recipientTbsCert = CmsUtilities.GetTbsCertificateStructure(value); + this.recipientPublicKey = value.GetPublicKey(); + this.info = recipientTbsCert.SubjectPublicKeyInfo; + } + } + + internal AsymmetricKeyParameter RecipientPublicKey + { + set + { + this.recipientPublicKey = value; + + try + { + info = SubjectPublicKeyInfoFactory.CreateSubjectPublicKeyInfo( + recipientPublicKey); + } + catch (IOException) + { + throw new ArgumentException("can't extract key algorithm from this key"); + } + } + } + + internal Asn1OctetString SubjectKeyIdentifier + { + set { this.subjectKeyIdentifier = value; } + } + + public RecipientInfo Generate(KeyParameter contentEncryptionKey, SecureRandom random) + { + byte[] keyBytes = contentEncryptionKey.GetKey(); + AlgorithmIdentifier keyEncryptionAlgorithm = info.AlgorithmID; + + IWrapper keyWrapper = Helper.CreateWrapper(keyEncryptionAlgorithm.ObjectID.Id); + keyWrapper.Init(true, new ParametersWithRandom(recipientPublicKey, random)); + byte[] encryptedKeyBytes = keyWrapper.Wrap(keyBytes, 0, keyBytes.Length); + + RecipientIdentifier recipId; + if (recipientTbsCert != null) + { + IssuerAndSerialNumber issuerAndSerial = new IssuerAndSerialNumber( + recipientTbsCert.Issuer, recipientTbsCert.SerialNumber.Value); + recipId = new RecipientIdentifier(issuerAndSerial); + } + else + { + recipId = new RecipientIdentifier(subjectKeyIdentifier); + } + + return new RecipientInfo(new KeyTransRecipientInfo(recipId, keyEncryptionAlgorithm, + new DerOctetString(encryptedKeyBytes))); + } + } +} diff --git a/Crypto/src/cms/KeyTransRecipientInformation.cs b/Crypto/src/cms/KeyTransRecipientInformation.cs new file mode 100644 index 000000000..24121cb2c --- /dev/null +++ b/Crypto/src/cms/KeyTransRecipientInformation.cs @@ -0,0 +1,113 @@ +using System; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Asn1Pkcs = Org.BouncyCastle.Asn1.Pkcs; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.Parameters; +using Org.BouncyCastle.Security; +using Org.BouncyCastle.X509; + +namespace Org.BouncyCastle.Cms +{ + /** + * the KeyTransRecipientInformation class for a recipient who has been sent a secret + * key encrypted using their public key that needs to be used to + * extract the message. + */ + public class KeyTransRecipientInformation + : RecipientInformation + { + private KeyTransRecipientInfo info; + + internal KeyTransRecipientInformation( + KeyTransRecipientInfo info, + CmsSecureReadable secureReadable) + : base(info.KeyEncryptionAlgorithm, secureReadable) + { + this.info = info; + this.rid = new RecipientID(); + + RecipientIdentifier r = info.RecipientIdentifier; + + try + { + if (r.IsTagged) + { + Asn1OctetString octs = Asn1OctetString.GetInstance(r.ID); + + rid.SubjectKeyIdentifier = octs.GetOctets(); + } + else + { + IssuerAndSerialNumber iAnds = IssuerAndSerialNumber.GetInstance(r.ID); + + rid.Issuer = iAnds.Name; + rid.SerialNumber = iAnds.SerialNumber.Value; + } + } + catch (IOException) + { + throw new ArgumentException("invalid rid in KeyTransRecipientInformation"); + } + } + + private string GetExchangeEncryptionAlgorithmName( + DerObjectIdentifier oid) + { + if (Asn1Pkcs.PkcsObjectIdentifiers.RsaEncryption.Equals(oid)) + { + return "RSA//PKCS1Padding"; + } + + return oid.Id; + } + + internal KeyParameter UnwrapKey(ICipherParameters key) + { + byte[] encryptedKey = info.EncryptedKey.GetOctets(); + string keyExchangeAlgorithm = GetExchangeEncryptionAlgorithmName(keyEncAlg.ObjectID); + + try + { + IWrapper keyWrapper = WrapperUtilities.GetWrapper(keyExchangeAlgorithm); + keyWrapper.Init(false, key); + + // FIXME Support for MAC algorithm parameters similar to cipher parameters + return ParameterUtilities.CreateKeyParameter( + GetContentAlgorithmName(), keyWrapper.Unwrap(encryptedKey, 0, encryptedKey.Length)); + } + catch (SecurityUtilityException e) + { + throw new CmsException("couldn't create cipher.", e); + } + catch (InvalidKeyException e) + { + throw new CmsException("key invalid in message.", e); + } +// catch (IllegalBlockSizeException e) + catch (DataLengthException e) + { + throw new CmsException("illegal blocksize in message.", e); + } +// catch (BadPaddingException e) + catch (InvalidCipherTextException e) + { + throw new CmsException("bad padding in message.", e); + } + } + + /** + * decrypt the content and return it as a byte array. + */ + public override CmsTypedStream GetContentStream( + ICipherParameters key) + { + KeyParameter sKey = UnwrapKey(key); + + return GetContentFromSessionKey(sKey); + } + } +} diff --git a/Crypto/src/cms/MacOutputStream.cs b/Crypto/src/cms/MacOutputStream.cs new file mode 100644 index 000000000..8891dbc2c --- /dev/null +++ b/Crypto/src/cms/MacOutputStream.cs @@ -0,0 +1,28 @@ +using System; + +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Utilities.IO; + +namespace Org.BouncyCastle.Cms +{ + internal class MacOutputStream + : BaseOutputStream + { + private readonly IMac mac; + + internal MacOutputStream(IMac mac) + { + this.mac = mac; + } + + public override void Write(byte[] b, int off, int len) + { + mac.BlockUpdate(b, off, len); + } + + public override void WriteByte(byte b) + { + mac.Update(b); + } + } +} diff --git a/Crypto/src/cms/NullOutputStream.cs b/Crypto/src/cms/NullOutputStream.cs new file mode 100644 index 000000000..ed937bdeb --- /dev/null +++ b/Crypto/src/cms/NullOutputStream.cs @@ -0,0 +1,20 @@ +using System; + +using Org.BouncyCastle.Utilities.IO; + +namespace Org.BouncyCastle.Cms +{ + internal class NullOutputStream + : BaseOutputStream + { + public override void WriteByte(byte b) + { + // do nothing + } + + public override void Write(byte[] buffer, int offset, int count) + { + // do nothing + } + } +} diff --git a/Crypto/src/cms/OriginatorId.cs b/Crypto/src/cms/OriginatorId.cs new file mode 100644 index 000000000..5a3b7374d --- /dev/null +++ b/Crypto/src/cms/OriginatorId.cs @@ -0,0 +1,51 @@ +using System; + +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Math; +using Org.BouncyCastle.Utilities; +using Org.BouncyCastle.X509.Store; + +namespace Org.BouncyCastle.Cms +{ + /** + * a basic index for an originator. + */ + public class OriginatorID + : X509CertStoreSelector + { + public override int GetHashCode() + { + int code = Arrays.GetHashCode(this.SubjectKeyIdentifier); + + BigInteger serialNumber = this.SerialNumber; + if (serialNumber != null) + { + code ^= serialNumber.GetHashCode(); + } + + X509Name issuer = this.Issuer; + if (issuer != null) + { + code ^= issuer.GetHashCode(); + } + + return code; + } + + public override bool Equals( + object obj) + { + if (obj == this) + return false; + + OriginatorID id = obj as OriginatorID; + + if (id == null) + return false; + + return Arrays.AreEqual(SubjectKeyIdentifier, id.SubjectKeyIdentifier) + && Platform.Equals(SerialNumber, id.SerialNumber) + && IssuersMatch(Issuer, id.Issuer); + } + } +} diff --git a/Crypto/src/cms/PKCS5Scheme2PBEKey.cs b/Crypto/src/cms/PKCS5Scheme2PBEKey.cs new file mode 100644 index 000000000..08b8518a1 --- /dev/null +++ b/Crypto/src/cms/PKCS5Scheme2PBEKey.cs @@ -0,0 +1,64 @@ +using System; + +using Org.BouncyCastle.Asn1.Pkcs; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.Generators; +using Org.BouncyCastle.Crypto.Parameters; + +namespace Org.BouncyCastle.Cms +{ + /// <summary> + /// PKCS5 scheme-2 - password converted to bytes assuming ASCII. + /// </summary> + public class Pkcs5Scheme2PbeKey + : CmsPbeKey + { + [Obsolete("Use version taking 'char[]' instead")] + public Pkcs5Scheme2PbeKey( + string password, + byte[] salt, + int iterationCount) + : this(password.ToCharArray(), salt, iterationCount) + { + } + + [Obsolete("Use version taking 'char[]' instead")] + public Pkcs5Scheme2PbeKey( + string password, + AlgorithmIdentifier keyDerivationAlgorithm) + : this(password.ToCharArray(), keyDerivationAlgorithm) + { + } + + public Pkcs5Scheme2PbeKey( + char[] password, + byte[] salt, + int iterationCount) + : base(password, salt, iterationCount) + { + } + + public Pkcs5Scheme2PbeKey( + char[] password, + AlgorithmIdentifier keyDerivationAlgorithm) + : base(password, keyDerivationAlgorithm) + { + } + + internal override KeyParameter GetEncoded( + string algorithmOid) + { + Pkcs5S2ParametersGenerator gen = new Pkcs5S2ParametersGenerator(); + + gen.Init( + PbeParametersGenerator.Pkcs5PasswordToBytes(password), + salt, + iterationCount); + + return (KeyParameter) gen.GenerateDerivedParameters( + algorithmOid, + CmsEnvelopedHelper.Instance.GetKeySize(algorithmOid)); + } + } +} diff --git a/Crypto/src/cms/PKCS5Scheme2UTF8PBEKey.cs b/Crypto/src/cms/PKCS5Scheme2UTF8PBEKey.cs new file mode 100644 index 000000000..7aecc2978 --- /dev/null +++ b/Crypto/src/cms/PKCS5Scheme2UTF8PBEKey.cs @@ -0,0 +1,64 @@ +using System; + +using Org.BouncyCastle.Asn1.Pkcs; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.Generators; +using Org.BouncyCastle.Crypto.Parameters; + +namespace Org.BouncyCastle.Cms +{ + /** + * PKCS5 scheme-2 - password converted to bytes using UTF-8. + */ + public class Pkcs5Scheme2Utf8PbeKey + : CmsPbeKey + { + [Obsolete("Use version taking 'char[]' instead")] + public Pkcs5Scheme2Utf8PbeKey( + string password, + byte[] salt, + int iterationCount) + : this(password.ToCharArray(), salt, iterationCount) + { + } + + [Obsolete("Use version taking 'char[]' instead")] + public Pkcs5Scheme2Utf8PbeKey( + string password, + AlgorithmIdentifier keyDerivationAlgorithm) + : this(password.ToCharArray(), keyDerivationAlgorithm) + { + } + + public Pkcs5Scheme2Utf8PbeKey( + char[] password, + byte[] salt, + int iterationCount) + : base(password, salt, iterationCount) + { + } + + public Pkcs5Scheme2Utf8PbeKey( + char[] password, + AlgorithmIdentifier keyDerivationAlgorithm) + : base(password, keyDerivationAlgorithm) + { + } + + internal override KeyParameter GetEncoded( + string algorithmOid) + { + Pkcs5S2ParametersGenerator gen = new Pkcs5S2ParametersGenerator(); + + gen.Init( + PbeParametersGenerator.Pkcs5PasswordToUtf8Bytes(password), + salt, + iterationCount); + + return (KeyParameter) gen.GenerateDerivedParameters( + algorithmOid, + CmsEnvelopedHelper.Instance.GetKeySize(algorithmOid)); + } + } +} diff --git a/Crypto/src/cms/PasswordRecipientInfoGenerator.cs b/Crypto/src/cms/PasswordRecipientInfoGenerator.cs new file mode 100644 index 000000000..0a0b27b53 --- /dev/null +++ b/Crypto/src/cms/PasswordRecipientInfoGenerator.cs @@ -0,0 +1,69 @@ +using System; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.Pkcs; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.Parameters; +using Org.BouncyCastle.Security; + +namespace Org.BouncyCastle.Cms +{ + internal class PasswordRecipientInfoGenerator : RecipientInfoGenerator + { + private static readonly CmsEnvelopedHelper Helper = CmsEnvelopedHelper.Instance; + + private AlgorithmIdentifier keyDerivationAlgorithm; + private KeyParameter keyEncryptionKey; + // TODO Can get this from keyEncryptionKey? + private string keyEncryptionKeyOID; + + internal PasswordRecipientInfoGenerator() + { + } + + internal AlgorithmIdentifier KeyDerivationAlgorithm + { + set { this.keyDerivationAlgorithm = value; } + } + + internal KeyParameter KeyEncryptionKey + { + set { this.keyEncryptionKey = value; } + } + + internal string KeyEncryptionKeyOID + { + set { this.keyEncryptionKeyOID = value; } + } + + public RecipientInfo Generate(KeyParameter contentEncryptionKey, SecureRandom random) + { + byte[] keyBytes = contentEncryptionKey.GetKey(); + + string rfc3211WrapperName = Helper.GetRfc3211WrapperName(keyEncryptionKeyOID); + IWrapper keyWrapper = Helper.CreateWrapper(rfc3211WrapperName); + + // Note: In Java build, the IV is automatically generated in JCE layer + int ivLength = rfc3211WrapperName.StartsWith("DESEDE") ? 8 : 16; + byte[] iv = new byte[ivLength]; + random.NextBytes(iv); + + ICipherParameters parameters = new ParametersWithIV(keyEncryptionKey, iv); + keyWrapper.Init(true, new ParametersWithRandom(parameters, random)); + Asn1OctetString encryptedKey = new DerOctetString( + keyWrapper.Wrap(keyBytes, 0, keyBytes.Length)); + + DerSequence seq = new DerSequence( + new DerObjectIdentifier(keyEncryptionKeyOID), + new DerOctetString(iv)); + + AlgorithmIdentifier keyEncryptionAlgorithm = new AlgorithmIdentifier( + PkcsObjectIdentifiers.IdAlgPwriKek, seq); + + return new RecipientInfo(new PasswordRecipientInfo( + keyDerivationAlgorithm, keyEncryptionAlgorithm, encryptedKey)); + } + } +} diff --git a/Crypto/src/cms/PasswordRecipientInformation.cs b/Crypto/src/cms/PasswordRecipientInformation.cs new file mode 100644 index 000000000..f629caba6 --- /dev/null +++ b/Crypto/src/cms/PasswordRecipientInformation.cs @@ -0,0 +1,79 @@ +using System; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.Parameters; +using Org.BouncyCastle.Security; + +namespace Org.BouncyCastle.Cms +{ + /** + * the RecipientInfo class for a recipient who has been sent a message + * encrypted using a password. + */ + public class PasswordRecipientInformation + : RecipientInformation + { + private readonly PasswordRecipientInfo info; + + internal PasswordRecipientInformation( + PasswordRecipientInfo info, + CmsSecureReadable secureReadable) + : base(info.KeyEncryptionAlgorithm, secureReadable) + { + this.info = info; + this.rid = new RecipientID(); + } + + /** + * return the object identifier for the key derivation algorithm, or null + * if there is none present. + * + * @return OID for key derivation algorithm, if present. + */ + public virtual AlgorithmIdentifier KeyDerivationAlgorithm + { + get { return info.KeyDerivationAlgorithm; } + } + + /** + * decrypt the content and return an input stream. + */ + public override CmsTypedStream GetContentStream( + ICipherParameters key) + { + try + { + AlgorithmIdentifier kekAlg = AlgorithmIdentifier.GetInstance(info.KeyEncryptionAlgorithm); + Asn1Sequence kekAlgParams = (Asn1Sequence)kekAlg.Parameters; + byte[] encryptedKey = info.EncryptedKey.GetOctets(); + string kekAlgName = DerObjectIdentifier.GetInstance(kekAlgParams[0]).Id; + string cName = CmsEnvelopedHelper.Instance.GetRfc3211WrapperName(kekAlgName); + IWrapper keyWrapper = WrapperUtilities.GetWrapper(cName); + + byte[] iv = Asn1OctetString.GetInstance(kekAlgParams[1]).GetOctets(); + + ICipherParameters parameters = ((CmsPbeKey)key).GetEncoded(kekAlgName); + parameters = new ParametersWithIV(parameters, iv); + + keyWrapper.Init(false, parameters); + + KeyParameter sKey = ParameterUtilities.CreateKeyParameter( + GetContentAlgorithmName(), keyWrapper.Unwrap(encryptedKey, 0, encryptedKey.Length)); + + return GetContentFromSessionKey(sKey); + } + catch (SecurityUtilityException e) + { + throw new CmsException("couldn't create cipher.", e); + } + catch (InvalidKeyException e) + { + throw new CmsException("key invalid in message.", e); + } + } + } +} diff --git a/Crypto/src/cms/RecipientId.cs b/Crypto/src/cms/RecipientId.cs new file mode 100644 index 000000000..9b6eb093b --- /dev/null +++ b/Crypto/src/cms/RecipientId.cs @@ -0,0 +1,58 @@ +using System; + +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Math; +using Org.BouncyCastle.Utilities; +using Org.BouncyCastle.X509.Store; + +namespace Org.BouncyCastle.Cms +{ + public class RecipientID + : X509CertStoreSelector + { + private byte[] keyIdentifier; + + public byte[] KeyIdentifier + { + get { return Arrays.Clone(keyIdentifier); } + set { keyIdentifier = Arrays.Clone(value); } + } + + public override int GetHashCode() + { + int code = Arrays.GetHashCode(keyIdentifier) + ^ Arrays.GetHashCode(this.SubjectKeyIdentifier); + + BigInteger serialNumber = this.SerialNumber; + if (serialNumber != null) + { + code ^= serialNumber.GetHashCode(); + } + + X509Name issuer = this.Issuer; + if (issuer != null) + { + code ^= issuer.GetHashCode(); + } + + return code; + } + + public override bool Equals( + object obj) + { + if (obj == this) + return true; + + RecipientID id = obj as RecipientID; + + if (id == null) + return false; + + return Arrays.AreEqual(keyIdentifier, id.keyIdentifier) + && Arrays.AreEqual(SubjectKeyIdentifier, id.SubjectKeyIdentifier) + && Platform.Equals(SerialNumber, id.SerialNumber) + && IssuersMatch(Issuer, id.Issuer); + } + } +} diff --git a/Crypto/src/cms/RecipientInfoGenerator.cs b/Crypto/src/cms/RecipientInfoGenerator.cs new file mode 100644 index 000000000..c41db6122 --- /dev/null +++ b/Crypto/src/cms/RecipientInfoGenerator.cs @@ -0,0 +1,26 @@ +using System; + +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Crypto.Parameters; +using Org.BouncyCastle.Security; + +namespace Org.BouncyCastle.Cms +{ + interface RecipientInfoGenerator + { + /// <summary> + /// Generate a RecipientInfo object for the given key. + /// </summary> + /// <param name="contentEncryptionKey"> + /// A <see cref="KeyParameter"/> + /// </param> + /// <param name="random"> + /// A <see cref="SecureRandom"/> + /// </param> + /// <returns> + /// A <see cref="RecipientInfo"/> + /// </returns> + /// <exception cref="GeneralSecurityException"></exception> + RecipientInfo Generate(KeyParameter contentEncryptionKey, SecureRandom random); + } +} diff --git a/Crypto/src/cms/RecipientInformation.cs b/Crypto/src/cms/RecipientInformation.cs new file mode 100644 index 000000000..8b0316be4 --- /dev/null +++ b/Crypto/src/cms/RecipientInformation.cs @@ -0,0 +1,126 @@ +using System; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Nist; +using Org.BouncyCastle.Asn1.Pkcs; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.IO; +using Org.BouncyCastle.Crypto.Parameters; +using Org.BouncyCastle.Security; +using Org.BouncyCastle.Utilities; +using Org.BouncyCastle.Utilities.Collections; + +namespace Org.BouncyCastle.Cms +{ + public abstract class RecipientInformation + { + internal RecipientID rid = new RecipientID(); + internal AlgorithmIdentifier keyEncAlg; + internal CmsSecureReadable secureReadable; + + private byte[] resultMac; + + internal RecipientInformation( + AlgorithmIdentifier keyEncAlg, + CmsSecureReadable secureReadable) + { + this.keyEncAlg = keyEncAlg; + this.secureReadable = secureReadable; + } + + internal string GetContentAlgorithmName() + { + AlgorithmIdentifier algorithm = secureReadable.Algorithm; +// return CmsEnvelopedHelper.Instance.GetSymmetricCipherName(algorithm.ObjectID.Id); + return algorithm.ObjectID.Id; + } + + public RecipientID RecipientID + { + get { return rid; } + } + + public AlgorithmIdentifier KeyEncryptionAlgorithmID + { + get { return keyEncAlg; } + } + + /** + * return the object identifier for the key encryption algorithm. + * + * @return OID for key encryption algorithm. + */ + public string KeyEncryptionAlgOid + { + get { return keyEncAlg.ObjectID.Id; } + } + + /** + * return the ASN.1 encoded key encryption algorithm parameters, or null if + * there aren't any. + * + * @return ASN.1 encoding of key encryption algorithm parameters. + */ + public Asn1Object KeyEncryptionAlgParams + { + get + { + Asn1Encodable ae = keyEncAlg.Parameters; + + return ae == null ? null : ae.ToAsn1Object(); + } + } + + internal CmsTypedStream GetContentFromSessionKey( + KeyParameter sKey) + { + CmsReadable readable = secureReadable.GetReadable(sKey); + + try + { + return new CmsTypedStream(readable.GetInputStream()); + } + catch (IOException e) + { + throw new CmsException("error getting .", e); + } + } + + public byte[] GetContent( + ICipherParameters key) + { + try + { + return CmsUtilities.StreamToByteArray(GetContentStream(key).ContentStream); + } + catch (IOException e) + { + throw new Exception("unable to parse internal stream: " + e); + } + } + + /** + * Return the MAC calculated for the content stream. Note: this call is only meaningful once all + * the content has been read. + * + * @return byte array containing the mac. + */ + public byte[] GetMac() + { + if (resultMac == null) + { + object cryptoObject = secureReadable.CryptoObject; + if (cryptoObject is IMac) + { + resultMac = MacUtilities.DoFinal((IMac)cryptoObject); + } + } + + return Arrays.Clone(resultMac); + } + + public abstract CmsTypedStream GetContentStream(ICipherParameters key); + } +} diff --git a/Crypto/src/cms/RecipientInformationStore.cs b/Crypto/src/cms/RecipientInformationStore.cs new file mode 100644 index 000000000..33b472f9d --- /dev/null +++ b/Crypto/src/cms/RecipientInformationStore.cs @@ -0,0 +1,86 @@ +using System; +using System.Collections; + +using Org.BouncyCastle.Utilities; + +namespace Org.BouncyCastle.Cms +{ + public class RecipientInformationStore + { + private readonly IList all; //ArrayList[RecipientInformation] + private readonly IDictionary table = Platform.CreateHashtable(); // Hashtable[RecipientID, ArrayList[RecipientInformation]] + + public RecipientInformationStore( + ICollection recipientInfos) + { + foreach (RecipientInformation recipientInformation in recipientInfos) + { + RecipientID rid = recipientInformation.RecipientID; + IList list = (IList)table[rid]; + + if (list == null) + { + table[rid] = list = Platform.CreateArrayList(1); + } + + list.Add(recipientInformation); + } + + this.all = Platform.CreateArrayList(recipientInfos); + } + + public RecipientInformation this[RecipientID selector] + { + get { return GetFirstRecipient(selector); } + } + + /** + * Return the first RecipientInformation object that matches the + * passed in selector. Null if there are no matches. + * + * @param selector to identify a recipient + * @return a single RecipientInformation object. Null if none matches. + */ + public RecipientInformation GetFirstRecipient( + RecipientID selector) + { + IList list = (IList) table[selector]; + + return list == null ? null : (RecipientInformation) list[0]; + } + + /** + * Return the number of recipients in the collection. + * + * @return number of recipients identified. + */ + public int Count + { + get { return all.Count; } + } + + /** + * Return all recipients in the collection + * + * @return a collection of recipients. + */ + public ICollection GetRecipients() + { + return Platform.CreateArrayList(all); + } + + /** + * Return possible empty collection with recipients matching the passed in RecipientID + * + * @param selector a recipient id to select against. + * @return a collection of RecipientInformation objects. + */ + public ICollection GetRecipients( + RecipientID selector) + { + IList list = (IList)table[selector]; + + return list == null ? Platform.CreateArrayList() : Platform.CreateArrayList(list); + } + } +} diff --git a/Crypto/src/cms/SigOutputStream.cs b/Crypto/src/cms/SigOutputStream.cs new file mode 100644 index 000000000..a807fa7fc --- /dev/null +++ b/Crypto/src/cms/SigOutputStream.cs @@ -0,0 +1,43 @@ +using System; + +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Utilities.IO; +using Org.BouncyCastle.Security; + +namespace Org.BouncyCastle.Cms +{ + internal class SigOutputStream + : BaseOutputStream + { + private readonly ISigner sig; + + internal SigOutputStream(ISigner sig) + { + this.sig = sig; + } + + public override void WriteByte(byte b) + { + try + { + sig.Update(b); + } + catch (SignatureException e) + { + throw new CmsStreamException("signature problem: " + e); + } + } + + public override void Write(byte[] b, int off, int len) + { + try + { + sig.BlockUpdate(b, off, len); + } + catch (SignatureException e) + { + throw new CmsStreamException("signature problem: " + e); + } + } + } +} \ No newline at end of file diff --git a/Crypto/src/cms/SignerId.cs b/Crypto/src/cms/SignerId.cs new file mode 100644 index 000000000..baac9369b --- /dev/null +++ b/Crypto/src/cms/SignerId.cs @@ -0,0 +1,51 @@ +using System; + +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Math; +using Org.BouncyCastle.Utilities; +using Org.BouncyCastle.X509.Store; + +namespace Org.BouncyCastle.Cms +{ + /** + * a basic index for a signer. + */ + public class SignerID + : X509CertStoreSelector + { + public override int GetHashCode() + { + int code = Arrays.GetHashCode(this.SubjectKeyIdentifier); + + BigInteger serialNumber = this.SerialNumber; + if (serialNumber != null) + { + code ^= serialNumber.GetHashCode(); + } + + X509Name issuer = this.Issuer; + if (issuer != null) + { + code ^= issuer.GetHashCode(); + } + + return code; + } + + public override bool Equals( + object obj) + { + if (obj == this) + return false; + + SignerID id = obj as SignerID; + + if (id == null) + return false; + + return Arrays.AreEqual(SubjectKeyIdentifier, id.SubjectKeyIdentifier) + && Platform.Equals(SerialNumber, id.SerialNumber) + && IssuersMatch(Issuer, id.Issuer); + } + } +} diff --git a/Crypto/src/cms/SignerInfoGenerator.cs b/Crypto/src/cms/SignerInfoGenerator.cs new file mode 100644 index 000000000..f78cf2c01 --- /dev/null +++ b/Crypto/src/cms/SignerInfoGenerator.cs @@ -0,0 +1,14 @@ +using System; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.X509; + +namespace Org.BouncyCastle.Cms +{ + internal interface SignerInfoGenerator + { + SignerInfo Generate(DerObjectIdentifier contentType, AlgorithmIdentifier digestAlgorithm, + byte[] calculatedDigest); + } +} diff --git a/Crypto/src/cms/SignerInformation.cs b/Crypto/src/cms/SignerInformation.cs new file mode 100644 index 000000000..20af29a50 --- /dev/null +++ b/Crypto/src/cms/SignerInformation.cs @@ -0,0 +1,758 @@ +using System; +using System.Collections; +using System.Diagnostics; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.Engines; +using Org.BouncyCastle.Crypto.Signers; +using Org.BouncyCastle.Security; +using Org.BouncyCastle.Utilities; +using Org.BouncyCastle.X509; + +namespace Org.BouncyCastle.Cms +{ + /** + * an expanded SignerInfo block from a CMS Signed message + */ + public class SignerInformation + { + private static readonly CmsSignedHelper Helper = CmsSignedHelper.Instance; + + private SignerID sid; + private SignerInfo info; + private AlgorithmIdentifier digestAlgorithm; + private AlgorithmIdentifier encryptionAlgorithm; + private readonly Asn1Set signedAttributeSet; + private readonly Asn1Set unsignedAttributeSet; + private CmsProcessable content; + private byte[] signature; + private DerObjectIdentifier contentType; + private IDigestCalculator digestCalculator; + private byte[] resultDigest; + + // Derived + private Asn1.Cms.AttributeTable signedAttributeTable; + private Asn1.Cms.AttributeTable unsignedAttributeTable; + private readonly bool isCounterSignature; + + internal SignerInformation( + SignerInfo info, + DerObjectIdentifier contentType, + CmsProcessable content, + IDigestCalculator digestCalculator) + { + this.info = info; + this.sid = new SignerID(); + this.contentType = contentType; + this.isCounterSignature = contentType == null; + + try + { + SignerIdentifier s = info.SignerID; + + if (s.IsTagged) + { + Asn1OctetString octs = Asn1OctetString.GetInstance(s.ID); + + sid.SubjectKeyIdentifier = octs.GetEncoded(); + } + else + { + Asn1.Cms.IssuerAndSerialNumber iAnds = + Asn1.Cms.IssuerAndSerialNumber.GetInstance(s.ID); + + sid.Issuer = iAnds.Name; + sid.SerialNumber = iAnds.SerialNumber.Value; + } + } + catch (IOException) + { + throw new ArgumentException("invalid sid in SignerInfo"); + } + + this.digestAlgorithm = info.DigestAlgorithm; + this.signedAttributeSet = info.AuthenticatedAttributes; + this.unsignedAttributeSet = info.UnauthenticatedAttributes; + this.encryptionAlgorithm = info.DigestEncryptionAlgorithm; + this.signature = info.EncryptedDigest.GetOctets(); + + this.content = content; + this.digestCalculator = digestCalculator; + } + + public bool IsCounterSignature + { + get { return isCounterSignature; } + } + + public DerObjectIdentifier ContentType + { + get { return contentType; } + } + + public SignerID SignerID + { + get { return sid; } + } + + /** + * return the version number for this objects underlying SignerInfo structure. + */ + public int Version + { + get { return info.Version.Value.IntValue; } + } + + public AlgorithmIdentifier DigestAlgorithmID + { + get { return digestAlgorithm; } + } + + /** + * return the object identifier for the signature. + */ + public string DigestAlgOid + { + get { return digestAlgorithm.ObjectID.Id; } + } + + /** + * return the signature parameters, or null if there aren't any. + */ + public Asn1Object DigestAlgParams + { + get + { + Asn1Encodable ae = digestAlgorithm.Parameters; + + return ae == null ? null : ae.ToAsn1Object(); + } + } + + /** + * return the content digest that was calculated during verification. + */ + public byte[] GetContentDigest() + { + if (resultDigest == null) + { + throw new InvalidOperationException("method can only be called after verify."); + } + + return (byte[])resultDigest.Clone(); + } + + public AlgorithmIdentifier EncryptionAlgorithmID + { + get { return encryptionAlgorithm; } + } + + /** + * return the object identifier for the signature. + */ + public string EncryptionAlgOid + { + get { return encryptionAlgorithm.ObjectID.Id; } + } + + /** + * return the signature/encryption algorithm parameters, or null if + * there aren't any. + */ + public Asn1Object EncryptionAlgParams + { + get + { + Asn1Encodable ae = encryptionAlgorithm.Parameters; + + return ae == null ? null : ae.ToAsn1Object(); + } + } + + /** + * return a table of the signed attributes - indexed by + * the OID of the attribute. + */ + public Asn1.Cms.AttributeTable SignedAttributes + { + get + { + if (signedAttributeSet != null && signedAttributeTable == null) + { + signedAttributeTable = new Asn1.Cms.AttributeTable(signedAttributeSet); + } + return signedAttributeTable; + } + } + + /** + * return a table of the unsigned attributes indexed by + * the OID of the attribute. + */ + public Asn1.Cms.AttributeTable UnsignedAttributes + { + get + { + if (unsignedAttributeSet != null && unsignedAttributeTable == null) + { + unsignedAttributeTable = new Asn1.Cms.AttributeTable(unsignedAttributeSet); + } + return unsignedAttributeTable; + } + } + + /** + * return the encoded signature + */ + public byte[] GetSignature() + { + return (byte[]) signature.Clone(); + } + + /** + * Return a SignerInformationStore containing the counter signatures attached to this + * signer. If no counter signatures are present an empty store is returned. + */ + public SignerInformationStore GetCounterSignatures() + { + // TODO There are several checks implied by the RFC3852 comments that are missing + + /* + The countersignature attribute MUST be an unsigned attribute; it MUST + NOT be a signed attribute, an authenticated attribute, an + unauthenticated attribute, or an unprotected attribute. + */ + Asn1.Cms.AttributeTable unsignedAttributeTable = UnsignedAttributes; + if (unsignedAttributeTable == null) + { + return new SignerInformationStore(Platform.CreateArrayList(0)); + } + + IList counterSignatures = Platform.CreateArrayList(); + + /* + The UnsignedAttributes syntax is defined as a SET OF Attributes. The + UnsignedAttributes in a signerInfo may include multiple instances of + the countersignature attribute. + */ + Asn1EncodableVector allCSAttrs = unsignedAttributeTable.GetAll(CmsAttributes.CounterSignature); + + foreach (Asn1.Cms.Attribute counterSignatureAttribute in allCSAttrs) + { + /* + A countersignature attribute can have multiple attribute values. The + syntax is defined as a SET OF AttributeValue, and there MUST be one + or more instances of AttributeValue present. + */ + Asn1Set values = counterSignatureAttribute.AttrValues; + if (values.Count < 1) + { + // TODO Throw an appropriate exception? + } + + foreach (Asn1Encodable asn1Obj in values) + { + /* + Countersignature values have the same meaning as SignerInfo values + for ordinary signatures, except that: + + 1. The signedAttributes field MUST NOT contain a content-type + attribute; there is no content type for countersignatures. + + 2. The signedAttributes field MUST contain a message-digest + attribute if it contains any other attributes. + + 3. The input to the message-digesting process is the contents + octets of the DER encoding of the signatureValue field of the + SignerInfo value with which the attribute is associated. + */ + SignerInfo si = SignerInfo.GetInstance(asn1Obj.ToAsn1Object()); + + string digestName = CmsSignedHelper.Instance.GetDigestAlgName(si.DigestAlgorithm.ObjectID.Id); + + counterSignatures.Add(new SignerInformation(si, null, null, new CounterSignatureDigestCalculator(digestName, GetSignature()))); + } + } + + return new SignerInformationStore(counterSignatures); + } + + /** + * return the DER encoding of the signed attributes. + * @throws IOException if an encoding error occurs. + */ + public byte[] GetEncodedSignedAttributes() + { + return signedAttributeSet == null + ? null + : signedAttributeSet.GetEncoded(Asn1Encodable.Der); + } + + private bool DoVerify( + AsymmetricKeyParameter key) + { + string digestName = Helper.GetDigestAlgName(this.DigestAlgOid); + IDigest digest = Helper.GetDigestInstance(digestName); + + DerObjectIdentifier sigAlgOid = this.encryptionAlgorithm.ObjectID; + Asn1Encodable sigParams = this.encryptionAlgorithm.Parameters; + ISigner sig; + + if (sigAlgOid.Equals(Asn1.Pkcs.PkcsObjectIdentifiers.IdRsassaPss)) + { + // RFC 4056 2.2 + // When the id-RSASSA-PSS algorithm identifier is used for a signature, + // the AlgorithmIdentifier parameters field MUST contain RSASSA-PSS-params. + if (sigParams == null) + throw new CmsException("RSASSA-PSS signature must specify algorithm parameters"); + + try + { + // TODO Provide abstract configuration mechanism + // (via alternate SignerUtilities.GetSigner method taking ASN.1 params) + + Asn1.Pkcs.RsassaPssParameters pss = Asn1.Pkcs.RsassaPssParameters.GetInstance( + sigParams.ToAsn1Object()); + + if (!pss.HashAlgorithm.ObjectID.Equals(this.digestAlgorithm.ObjectID)) + throw new CmsException("RSASSA-PSS signature parameters specified incorrect hash algorithm"); + if (!pss.MaskGenAlgorithm.ObjectID.Equals(Asn1.Pkcs.PkcsObjectIdentifiers.IdMgf1)) + throw new CmsException("RSASSA-PSS signature parameters specified unknown MGF"); + + IDigest pssDigest = DigestUtilities.GetDigest(pss.HashAlgorithm.ObjectID); + int saltLength = pss.SaltLength.Value.IntValue; + byte trailerField = (byte) pss.TrailerField.Value.IntValue; + + // RFC 4055 3.1 + // The value MUST be 1, which represents the trailer field with hexadecimal value 0xBC + if (trailerField != 1) + throw new CmsException("RSASSA-PSS signature parameters must have trailerField of 1"); + + sig = new PssSigner(new RsaBlindedEngine(), pssDigest, saltLength); + } + catch (Exception e) + { + throw new CmsException("failed to set RSASSA-PSS signature parameters", e); + } + } + else + { + // TODO Probably too strong a check at the moment +// if (sigParams != null) +// throw new CmsException("unrecognised signature parameters provided"); + + string signatureName = digestName + "with" + Helper.GetEncryptionAlgName(this.EncryptionAlgOid); + + sig = Helper.GetSignatureInstance(signatureName); + } + + try + { + if (digestCalculator != null) + { + resultDigest = digestCalculator.GetDigest(); + } + else + { + if (content != null) + { + content.Write(new DigOutputStream(digest)); + } + else if (signedAttributeSet == null) + { + // TODO Get rid of this exception and just treat content==null as empty not missing? + throw new CmsException("data not encapsulated in signature - use detached constructor."); + } + + resultDigest = DigestUtilities.DoFinal(digest); + } + } + catch (IOException e) + { + throw new CmsException("can't process mime object to create signature.", e); + } + + // RFC 3852 11.1 Check the content-type attribute is correct + { + Asn1Object validContentType = GetSingleValuedSignedAttribute( + CmsAttributes.ContentType, "content-type"); + if (validContentType == null) + { + if (!isCounterSignature && signedAttributeSet != null) + throw new CmsException("The content-type attribute type MUST be present whenever signed attributes are present in signed-data"); + } + else + { + if (isCounterSignature) + throw new CmsException("[For counter signatures,] the signedAttributes field MUST NOT contain a content-type attribute"); + + if (!(validContentType is DerObjectIdentifier)) + throw new CmsException("content-type attribute value not of ASN.1 type 'OBJECT IDENTIFIER'"); + + DerObjectIdentifier signedContentType = (DerObjectIdentifier)validContentType; + + if (!signedContentType.Equals(contentType)) + throw new CmsException("content-type attribute value does not match eContentType"); + } + } + + // RFC 3852 11.2 Check the message-digest attribute is correct + { + Asn1Object validMessageDigest = GetSingleValuedSignedAttribute( + CmsAttributes.MessageDigest, "message-digest"); + if (validMessageDigest == null) + { + if (signedAttributeSet != null) + throw new CmsException("the message-digest signed attribute type MUST be present when there are any signed attributes present"); + } + else + { + if (!(validMessageDigest is Asn1OctetString)) + { + throw new CmsException("message-digest attribute value not of ASN.1 type 'OCTET STRING'"); + } + + Asn1OctetString signedMessageDigest = (Asn1OctetString)validMessageDigest; + + if (!Arrays.AreEqual(resultDigest, signedMessageDigest.GetOctets())) + throw new CmsException("message-digest attribute value does not match calculated value"); + } + } + + // RFC 3852 11.4 Validate countersignature attribute(s) + { + Asn1.Cms.AttributeTable signedAttrTable = this.SignedAttributes; + if (signedAttrTable != null + && signedAttrTable.GetAll(CmsAttributes.CounterSignature).Count > 0) + { + throw new CmsException("A countersignature attribute MUST NOT be a signed attribute"); + } + + Asn1.Cms.AttributeTable unsignedAttrTable = this.UnsignedAttributes; + if (unsignedAttrTable != null) + { + foreach (Asn1.Cms.Attribute csAttr in unsignedAttrTable.GetAll(CmsAttributes.CounterSignature)) + { + if (csAttr.AttrValues.Count < 1) + throw new CmsException("A countersignature attribute MUST contain at least one AttributeValue"); + + // Note: We don't recursively validate the countersignature value + } + } + } + + try + { + sig.Init(false, key); + + if (signedAttributeSet == null) + { + if (digestCalculator != null) + { + // need to decrypt signature and check message bytes + return VerifyDigest(resultDigest, key, this.GetSignature()); + } + else if (content != null) + { + // TODO Use raw signature of the hash value instead + content.Write(new SigOutputStream(sig)); + } + } + else + { + byte[] tmp = this.GetEncodedSignedAttributes(); + sig.BlockUpdate(tmp, 0, tmp.Length); + } + + return sig.VerifySignature(this.GetSignature()); + } + catch (InvalidKeyException e) + { + throw new CmsException("key not appropriate to signature in message.", e); + } + catch (IOException e) + { + throw new CmsException("can't process mime object to create signature.", e); + } + catch (SignatureException e) + { + throw new CmsException("invalid signature format in message: " + e.Message, e); + } + } + + private bool IsNull( + Asn1Encodable o) + { + return (o is Asn1Null) || (o == null); + } + + private DigestInfo DerDecode( + byte[] encoding) + { + if (encoding[0] != (int)(Asn1Tags.Constructed | Asn1Tags.Sequence)) + { + throw new IOException("not a digest info object"); + } + + DigestInfo digInfo = DigestInfo.GetInstance(Asn1Object.FromByteArray(encoding)); + + // length check to avoid Bleichenbacher vulnerability + + if (digInfo.GetEncoded().Length != encoding.Length) + { + throw new CmsException("malformed RSA signature"); + } + + return digInfo; + } + + private bool VerifyDigest( + byte[] digest, + AsymmetricKeyParameter key, + byte[] signature) + { + string algorithm = Helper.GetEncryptionAlgName(this.EncryptionAlgOid); + + try + { + if (algorithm.Equals("RSA")) + { + IBufferedCipher c = CmsEnvelopedHelper.Instance.CreateAsymmetricCipher("RSA/ECB/PKCS1Padding"); + + c.Init(false, key); + + byte[] decrypt = c.DoFinal(signature); + + DigestInfo digInfo = DerDecode(decrypt); + + if (!digInfo.AlgorithmID.ObjectID.Equals(digestAlgorithm.ObjectID)) + { + return false; + } + + if (!IsNull(digInfo.AlgorithmID.Parameters)) + { + return false; + } + + byte[] sigHash = digInfo.GetDigest(); + + return Arrays.ConstantTimeAreEqual(digest, sigHash); + } + else if (algorithm.Equals("DSA")) + { + ISigner sig = SignerUtilities.GetSigner("NONEwithDSA"); + + sig.Init(false, key); + + sig.BlockUpdate(digest, 0, digest.Length); + + return sig.VerifySignature(signature); + } + else + { + throw new CmsException("algorithm: " + algorithm + " not supported in base signatures."); + } + } + catch (SecurityUtilityException e) + { + throw e; + } + catch (GeneralSecurityException e) + { + throw new CmsException("Exception processing signature: " + e, e); + } + catch (IOException e) + { + throw new CmsException("Exception decoding signature: " + e, e); + } + } + + /** + * verify that the given public key successfully handles and confirms the + * signature associated with this signer. + */ + public bool Verify( + AsymmetricKeyParameter pubKey) + { + if (pubKey.IsPrivate) + throw new ArgumentException("Expected public key", "pubKey"); + + // Optional, but still need to validate if present + GetSigningTime(); + + return DoVerify(pubKey); + } + + /** + * verify that the given certificate successfully handles and confirms + * the signature associated with this signer and, if a signingTime + * attribute is available, that the certificate was valid at the time the + * signature was generated. + */ + public bool Verify( + X509Certificate cert) + { + Asn1.Cms.Time signingTime = GetSigningTime(); + if (signingTime != null) + { + cert.CheckValidity(signingTime.Date); + } + + return DoVerify(cert.GetPublicKey()); + } + + /** + * Return the base ASN.1 CMS structure that this object contains. + * + * @return an object containing a CMS SignerInfo structure. + */ + public SignerInfo ToSignerInfo() + { + return info; + } + + private Asn1Object GetSingleValuedSignedAttribute( + DerObjectIdentifier attrOID, string printableName) + { + + Asn1.Cms.AttributeTable unsignedAttrTable = this.UnsignedAttributes; + if (unsignedAttrTable != null + && unsignedAttrTable.GetAll(attrOID).Count > 0) + { + throw new CmsException("The " + printableName + + " attribute MUST NOT be an unsigned attribute"); + } + + Asn1.Cms.AttributeTable signedAttrTable = this.SignedAttributes; + if (signedAttrTable == null) + { + return null; + } + + Asn1EncodableVector v = signedAttrTable.GetAll(attrOID); + switch (v.Count) + { + case 0: + return null; + case 1: + Asn1.Cms.Attribute t = (Asn1.Cms.Attribute) v[0]; + Asn1Set attrValues = t.AttrValues; + + if (attrValues.Count != 1) + throw new CmsException("A " + printableName + + " attribute MUST have a single attribute value"); + + return attrValues[0].ToAsn1Object(); + default: + throw new CmsException("The SignedAttributes in a signerInfo MUST NOT include multiple instances of the " + + printableName + " attribute"); + } + } + + private Asn1.Cms.Time GetSigningTime() + { + Asn1Object validSigningTime = GetSingleValuedSignedAttribute( + CmsAttributes.SigningTime, "signing-time"); + + if (validSigningTime == null) + return null; + + try + { + return Asn1.Cms.Time.GetInstance(validSigningTime); + } + catch (ArgumentException) + { + throw new CmsException("signing-time attribute value not a valid 'Time' structure"); + } + } + + /** + * Return a signer information object with the passed in unsigned + * attributes replacing the ones that are current associated with + * the object passed in. + * + * @param signerInformation the signerInfo to be used as the basis. + * @param unsignedAttributes the unsigned attributes to add. + * @return a copy of the original SignerInformationObject with the changed attributes. + */ + public static SignerInformation ReplaceUnsignedAttributes( + SignerInformation signerInformation, + Asn1.Cms.AttributeTable unsignedAttributes) + { + SignerInfo sInfo = signerInformation.info; + Asn1Set unsignedAttr = null; + + if (unsignedAttributes != null) + { + unsignedAttr = new DerSet(unsignedAttributes.ToAsn1EncodableVector()); + } + + return new SignerInformation( + new SignerInfo( + sInfo.SignerID, + sInfo.DigestAlgorithm, + sInfo.AuthenticatedAttributes, + sInfo.DigestEncryptionAlgorithm, + sInfo.EncryptedDigest, + unsignedAttr), + signerInformation.contentType, + signerInformation.content, + null); + } + + /** + * Return a signer information object with passed in SignerInformationStore representing counter + * signatures attached as an unsigned attribute. + * + * @param signerInformation the signerInfo to be used as the basis. + * @param counterSigners signer info objects carrying counter signature. + * @return a copy of the original SignerInformationObject with the changed attributes. + */ + public static SignerInformation AddCounterSigners( + SignerInformation signerInformation, + SignerInformationStore counterSigners) + { + // TODO Perform checks from RFC 3852 11.4 + + SignerInfo sInfo = signerInformation.info; + Asn1.Cms.AttributeTable unsignedAttr = signerInformation.UnsignedAttributes; + Asn1EncodableVector v; + + if (unsignedAttr != null) + { + v = unsignedAttr.ToAsn1EncodableVector(); + } + else + { + v = new Asn1EncodableVector(); + } + + Asn1EncodableVector sigs = new Asn1EncodableVector(); + + foreach (SignerInformation sigInf in counterSigners.GetSigners()) + { + sigs.Add(sigInf.ToSignerInfo()); + } + + v.Add(new Asn1.Cms.Attribute(CmsAttributes.CounterSignature, new DerSet(sigs))); + + return new SignerInformation( + new SignerInfo( + sInfo.SignerID, + sInfo.DigestAlgorithm, + sInfo.AuthenticatedAttributes, + sInfo.DigestEncryptionAlgorithm, + sInfo.EncryptedDigest, + new DerSet(v)), + signerInformation.contentType, + signerInformation.content, + null); + } + } +} diff --git a/Crypto/src/cms/SignerInformationStore.cs b/Crypto/src/cms/SignerInformationStore.cs new file mode 100644 index 000000000..bd613843d --- /dev/null +++ b/Crypto/src/cms/SignerInformationStore.cs @@ -0,0 +1,74 @@ +using System; +using System.Collections; +using System.IO; + +using Org.BouncyCastle.Utilities; + +namespace Org.BouncyCastle.Cms +{ + public class SignerInformationStore + { + private readonly IList all; //ArrayList[SignerInformation] + private readonly IDictionary table = Platform.CreateHashtable(); // Hashtable[SignerID, ArrayList[SignerInformation]] + + public SignerInformationStore( + ICollection signerInfos) + { + foreach (SignerInformation signer in signerInfos) + { + SignerID sid = signer.SignerID; + IList list = (IList)table[sid]; + + if (list == null) + { + table[sid] = list = Platform.CreateArrayList(1); + } + + list.Add(signer); + } + + this.all = Platform.CreateArrayList(signerInfos); + } + + /** + * Return the first SignerInformation object that matches the + * passed in selector. Null if there are no matches. + * + * @param selector to identify a signer + * @return a single SignerInformation object. Null if none matches. + */ + public SignerInformation GetFirstSigner( + SignerID selector) + { + IList list = (IList) table[selector]; + + return list == null ? null : (SignerInformation) list[0]; + } + + /// <summary>The number of signers in the collection.</summary> + public int Count + { + get { return all.Count; } + } + + /// <returns>An ICollection of all signers in the collection</returns> + public ICollection GetSigners() + { + return Platform.CreateArrayList(all); + } + + /** + * Return possible empty collection with signers matching the passed in SignerID + * + * @param selector a signer id to select against. + * @return a collection of SignerInformation objects. + */ + public ICollection GetSigners( + SignerID selector) + { + IList list = (IList) table[selector]; + + return list == null ? Platform.CreateArrayList() : Platform.CreateArrayList(list); + } + } +} diff --git a/Crypto/src/cms/SimpleAttributeTableGenerator.cs b/Crypto/src/cms/SimpleAttributeTableGenerator.cs new file mode 100644 index 000000000..b3df21c29 --- /dev/null +++ b/Crypto/src/cms/SimpleAttributeTableGenerator.cs @@ -0,0 +1,28 @@ +using System; +using System.Collections; + +using Org.BouncyCastle.Asn1.Cms; + +namespace Org.BouncyCastle.Cms +{ + /** + * Basic generator that just returns a preconstructed attribute table + */ + public class SimpleAttributeTableGenerator + : CmsAttributeTableGenerator + { + private readonly AttributeTable attributes; + + public SimpleAttributeTableGenerator( + AttributeTable attributes) + { + this.attributes = attributes; + } + + public virtual AttributeTable GetAttributes( + IDictionary parameters) + { + return attributes; + } + } +} |