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Diffstat (limited to 'crypto/src/cms/CMSEnvelopedGenerator.cs')
| -rw-r--r-- | crypto/src/cms/CMSEnvelopedGenerator.cs | 331 |
1 files changed, 331 insertions, 0 deletions
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; + } + } +} |