diff options
Diffstat (limited to 'crypto/src/tsp')
| -rw-r--r-- | crypto/src/tsp/GenTimeAccuracy.cs | 33 | ||||
| -rw-r--r-- | crypto/src/tsp/TSPAlgorithms.cs | 48 | ||||
| -rw-r--r-- | crypto/src/tsp/TSPException.cs | 5 | ||||
| -rw-r--r-- | crypto/src/tsp/TSPUtil.cs | 202 | ||||
| -rw-r--r-- | crypto/src/tsp/TSPValidationException.cs | 7 | ||||
| -rw-r--r-- | crypto/src/tsp/TimeStampRequest.cs | 196 | ||||
| -rw-r--r-- | crypto/src/tsp/TimeStampRequestGenerator.cs | 139 | ||||
| -rw-r--r-- | crypto/src/tsp/TimeStampResponse.cs | 184 | ||||
| -rw-r--r-- | crypto/src/tsp/TimeStampResponseGenerator.cs | 210 | ||||
| -rw-r--r-- | crypto/src/tsp/TimeStampToken.cs | 305 | ||||
| -rw-r--r-- | crypto/src/tsp/TimeStampTokenGenerator.cs | 245 | ||||
| -rw-r--r-- | crypto/src/tsp/TimeStampTokenInfo.cs | 107 |
12 files changed, 1679 insertions, 2 deletions
diff --git a/crypto/src/tsp/GenTimeAccuracy.cs b/crypto/src/tsp/GenTimeAccuracy.cs new file mode 100644 index 000000000..8a2f29989 --- /dev/null +++ b/crypto/src/tsp/GenTimeAccuracy.cs @@ -0,0 +1,33 @@ +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Tsp; + +namespace Org.BouncyCastle.Tsp +{ + public class GenTimeAccuracy + { + private Accuracy accuracy; + + public GenTimeAccuracy( + Accuracy accuracy) + { + this.accuracy = accuracy; + } + + public int Seconds { get { return GetTimeComponent(accuracy.Seconds); } } + + public int Millis { get { return GetTimeComponent(accuracy.Millis); } } + + public int Micros { get { return GetTimeComponent(accuracy.Micros); } } + + private int GetTimeComponent( + DerInteger time) + { + return time == null ? 0 : time.Value.IntValue; + } + + public override string ToString() + { + return Seconds + "." + Millis.ToString("000") + Micros.ToString("000"); + } + } +} diff --git a/crypto/src/tsp/TSPAlgorithms.cs b/crypto/src/tsp/TSPAlgorithms.cs new file mode 100644 index 000000000..e3dfc7916 --- /dev/null +++ b/crypto/src/tsp/TSPAlgorithms.cs @@ -0,0 +1,48 @@ +using System.Collections; + +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.Utilities; + +namespace Org.BouncyCastle.Tsp +{ + /** + * Recognised hash algorithms for the time stamp protocol. + */ + public abstract class TspAlgorithms + { + public static readonly string MD5 = PkcsObjectIdentifiers.MD5.Id; + + public static readonly string Sha1 = OiwObjectIdentifiers.IdSha1.Id; + + public static readonly string Sha224 = NistObjectIdentifiers.IdSha224.Id; + public static readonly string Sha256 = NistObjectIdentifiers.IdSha256.Id; + public static readonly string Sha384 = NistObjectIdentifiers.IdSha384.Id; + public static readonly string Sha512 = NistObjectIdentifiers.IdSha512.Id; + + public static readonly string RipeMD128 = TeleTrusTObjectIdentifiers.RipeMD128.Id; + public static readonly string RipeMD160 = TeleTrusTObjectIdentifiers.RipeMD160.Id; + public static readonly string RipeMD256 = TeleTrusTObjectIdentifiers.RipeMD256.Id; + + public static readonly string Gost3411 = CryptoProObjectIdentifiers.GostR3411.Id; + + public static readonly IList Allowed; + + static TspAlgorithms() + { + string[] algs = new string[] + { + Gost3411, MD5, Sha1, Sha224, Sha256, Sha384, Sha512, RipeMD128, RipeMD160, RipeMD256 + }; + + Allowed = Platform.CreateArrayList(); + foreach (string alg in algs) + { + Allowed.Add(alg); + } + } + } +} diff --git a/crypto/src/tsp/TSPException.cs b/crypto/src/tsp/TSPException.cs index a5e24163d..3917e96a7 100644 --- a/crypto/src/tsp/TSPException.cs +++ b/crypto/src/tsp/TSPException.cs @@ -2,7 +2,10 @@ using System; namespace Org.BouncyCastle.Tsp { - public class TspException +#if !(NETCF_1_0 || NETCF_2_0 || SILVERLIGHT) + [Serializable] +#endif + public class TspException : Exception { public TspException() diff --git a/crypto/src/tsp/TSPUtil.cs b/crypto/src/tsp/TSPUtil.cs new file mode 100644 index 000000000..1026914f4 --- /dev/null +++ b/crypto/src/tsp/TSPUtil.cs @@ -0,0 +1,202 @@ +using System; +using System.Collections; +using System.IO; + +using Org.BouncyCastle.Asn1; +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.Cms; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Security; +using Org.BouncyCastle.Utilities; +using Org.BouncyCastle.Utilities.Collections; +using Org.BouncyCastle.X509; + +namespace Org.BouncyCastle.Tsp +{ + public class TspUtil + { + private static ISet EmptySet = CollectionUtilities.ReadOnly(new HashSet()); + private static IList EmptyList = CollectionUtilities.ReadOnly(Platform.CreateArrayList()); + + private static readonly IDictionary digestLengths = Platform.CreateHashtable(); + private static readonly IDictionary digestNames = Platform.CreateHashtable(); + + static TspUtil() + { + digestLengths.Add(PkcsObjectIdentifiers.MD5.Id, 16); + digestLengths.Add(OiwObjectIdentifiers.IdSha1.Id, 20); + digestLengths.Add(NistObjectIdentifiers.IdSha224.Id, 28); + digestLengths.Add(NistObjectIdentifiers.IdSha256.Id, 32); + digestLengths.Add(NistObjectIdentifiers.IdSha384.Id, 48); + digestLengths.Add(NistObjectIdentifiers.IdSha512.Id, 64); + digestLengths.Add(TeleTrusTObjectIdentifiers.RipeMD128.Id, 16); + digestLengths.Add(TeleTrusTObjectIdentifiers.RipeMD160.Id, 20); + digestLengths.Add(TeleTrusTObjectIdentifiers.RipeMD256.Id, 32); + digestLengths.Add(CryptoProObjectIdentifiers.GostR3411.Id, 32); + + digestNames.Add(PkcsObjectIdentifiers.MD5.Id, "MD5"); + digestNames.Add(OiwObjectIdentifiers.IdSha1.Id, "SHA1"); + digestNames.Add(NistObjectIdentifiers.IdSha224.Id, "SHA224"); + digestNames.Add(NistObjectIdentifiers.IdSha256.Id, "SHA256"); + digestNames.Add(NistObjectIdentifiers.IdSha384.Id, "SHA384"); + digestNames.Add(NistObjectIdentifiers.IdSha512.Id, "SHA512"); + digestNames.Add(PkcsObjectIdentifiers.Sha1WithRsaEncryption.Id, "SHA1"); + digestNames.Add(PkcsObjectIdentifiers.Sha224WithRsaEncryption.Id, "SHA224"); + digestNames.Add(PkcsObjectIdentifiers.Sha256WithRsaEncryption.Id, "SHA256"); + digestNames.Add(PkcsObjectIdentifiers.Sha384WithRsaEncryption.Id, "SHA384"); + digestNames.Add(PkcsObjectIdentifiers.Sha512WithRsaEncryption.Id, "SHA512"); + digestNames.Add(TeleTrusTObjectIdentifiers.RipeMD128.Id, "RIPEMD128"); + digestNames.Add(TeleTrusTObjectIdentifiers.RipeMD160.Id, "RIPEMD160"); + digestNames.Add(TeleTrusTObjectIdentifiers.RipeMD256.Id, "RIPEMD256"); + digestNames.Add(CryptoProObjectIdentifiers.GostR3411.Id, "GOST3411"); + } + + + /** + * Fetches the signature time-stamp attributes from a SignerInformation object. + * Checks that the MessageImprint for each time-stamp matches the signature field. + * (see RFC 3161 Appendix A). + * + * @param signerInfo a SignerInformation to search for time-stamps + * @return a collection of TimeStampToken objects + * @throws TSPValidationException + */ + public static ICollection GetSignatureTimestamps( + SignerInformation signerInfo) + { + IList timestamps = Platform.CreateArrayList(); + + Asn1.Cms.AttributeTable unsignedAttrs = signerInfo.UnsignedAttributes; + if (unsignedAttrs != null) + { + foreach (Asn1.Cms.Attribute tsAttr in unsignedAttrs.GetAll( + PkcsObjectIdentifiers.IdAASignatureTimeStampToken)) + { + foreach (Asn1Encodable asn1 in tsAttr.AttrValues) + { + try + { + Asn1.Cms.ContentInfo contentInfo = Asn1.Cms.ContentInfo.GetInstance( + asn1.ToAsn1Object()); + TimeStampToken timeStampToken = new TimeStampToken(contentInfo); + TimeStampTokenInfo tstInfo = timeStampToken.TimeStampInfo; + + byte[] expectedDigest = DigestUtilities.CalculateDigest( + GetDigestAlgName(tstInfo.MessageImprintAlgOid), + signerInfo.GetSignature()); + + if (!Arrays.ConstantTimeAreEqual(expectedDigest, tstInfo.GetMessageImprintDigest())) + throw new TspValidationException("Incorrect digest in message imprint"); + + timestamps.Add(timeStampToken); + } + catch (SecurityUtilityException) + { + throw new TspValidationException("Unknown hash algorithm specified in timestamp"); + } + catch (Exception) + { + throw new TspValidationException("Timestamp could not be parsed"); + } + } + } + } + + return timestamps; + } + + /** + * Validate the passed in certificate as being of the correct type to be used + * for time stamping. To be valid it must have an ExtendedKeyUsage extension + * which has a key purpose identifier of id-kp-timeStamping. + * + * @param cert the certificate of interest. + * @throws TspValidationException if the certicate fails on one of the check points. + */ + public static void ValidateCertificate( + X509Certificate cert) + { + if (cert.Version != 3) + throw new ArgumentException("Certificate must have an ExtendedKeyUsage extension."); + + Asn1OctetString ext = cert.GetExtensionValue(X509Extensions.ExtendedKeyUsage); + if (ext == null) + throw new TspValidationException("Certificate must have an ExtendedKeyUsage extension."); + + if (!cert.GetCriticalExtensionOids().Contains(X509Extensions.ExtendedKeyUsage.Id)) + throw new TspValidationException("Certificate must have an ExtendedKeyUsage extension marked as critical."); + + try + { + ExtendedKeyUsage extKey = ExtendedKeyUsage.GetInstance( + Asn1Object.FromByteArray(ext.GetOctets())); + + if (!extKey.HasKeyPurposeId(KeyPurposeID.IdKPTimeStamping) || extKey.Count != 1) + throw new TspValidationException("ExtendedKeyUsage not solely time stamping."); + } + catch (IOException) + { + throw new TspValidationException("cannot process ExtendedKeyUsage extension"); + } + } + + /// <summary> + /// Return the digest algorithm using one of the standard JCA string + /// representations rather than the algorithm identifier (if possible). + /// </summary> + internal static string GetDigestAlgName( + string digestAlgOID) + { + string digestName = (string) digestNames[digestAlgOID]; + + return digestName != null ? digestName : digestAlgOID; + } + + internal static int GetDigestLength( + string digestAlgOID) + { + if (!digestLengths.Contains(digestAlgOID)) + throw new TspException("digest algorithm cannot be found."); + + return (int)digestLengths[digestAlgOID]; + } + + internal static IDigest CreateDigestInstance( + String digestAlgOID) + { + string digestName = GetDigestAlgName(digestAlgOID); + + return DigestUtilities.GetDigest(digestName); + } + + internal static ISet GetCriticalExtensionOids(X509Extensions extensions) + { + if (extensions == null) + return EmptySet; + + return CollectionUtilities.ReadOnly(new HashSet(extensions.GetCriticalExtensionOids())); + } + + internal static ISet GetNonCriticalExtensionOids(X509Extensions extensions) + { + if (extensions == null) + return EmptySet; + + // TODO: should probably produce a set that imposes correct ordering + return CollectionUtilities.ReadOnly(new HashSet(extensions.GetNonCriticalExtensionOids())); + } + + internal static IList GetExtensionOids(X509Extensions extensions) + { + if (extensions == null) + return EmptyList; + + return CollectionUtilities.ReadOnly(Platform.CreateArrayList(extensions.GetExtensionOids())); + } + } +} diff --git a/crypto/src/tsp/TSPValidationException.cs b/crypto/src/tsp/TSPValidationException.cs index d8243e65f..8ef2ec6cf 100644 --- a/crypto/src/tsp/TSPValidationException.cs +++ b/crypto/src/tsp/TSPValidationException.cs @@ -1,3 +1,5 @@ +using System; + namespace Org.BouncyCastle.Tsp { /** @@ -6,7 +8,10 @@ namespace Org.BouncyCastle.Tsp * If a failure code is associated with the exception it can be retrieved using * the getFailureCode() method.</p> */ - public class TspValidationException +#if !(NETCF_1_0 || NETCF_2_0 || SILVERLIGHT) + [Serializable] +#endif + public class TspValidationException : TspException { private int failureCode; diff --git a/crypto/src/tsp/TimeStampRequest.cs b/crypto/src/tsp/TimeStampRequest.cs new file mode 100644 index 000000000..6b9699379 --- /dev/null +++ b/crypto/src/tsp/TimeStampRequest.cs @@ -0,0 +1,196 @@ +using System; +using System.Collections; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cmp; +using Org.BouncyCastle.Asn1.Tsp; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Math; +using Org.BouncyCastle.Security; +using Org.BouncyCastle.X509; + +namespace Org.BouncyCastle.Tsp +{ + /** + * Base class for an RFC 3161 Time Stamp Request. + */ + public class TimeStampRequest + : X509ExtensionBase + { + private TimeStampReq req; + private X509Extensions extensions; + + public TimeStampRequest( + TimeStampReq req) + { + this.req = req; + this.extensions = req.Extensions; + } + + /** + * Create a TimeStampRequest from the past in byte array. + * + * @param req byte array containing the request. + * @throws IOException if the request is malformed. + */ + public TimeStampRequest( + byte[] req) + : this(new Asn1InputStream(req)) + { + } + + /** + * Create a TimeStampRequest from the past in input stream. + * + * @param in input stream containing the request. + * @throws IOException if the request is malformed. + */ + public TimeStampRequest( + Stream input) + : this(new Asn1InputStream(input)) + { + } + + private TimeStampRequest( + Asn1InputStream str) + { + try + { + this.req = TimeStampReq.GetInstance(str.ReadObject()); + } + catch (InvalidCastException e) + { + throw new IOException("malformed request: " + e); + } + catch (ArgumentException e) + { + throw new IOException("malformed request: " + e); + } + } + + public int Version + { + get { return req.Version.Value.IntValue; } + } + + public string MessageImprintAlgOid + { + get { return req.MessageImprint.HashAlgorithm.ObjectID.Id; } + } + + public byte[] GetMessageImprintDigest() + { + return req.MessageImprint.GetHashedMessage(); + } + + public string ReqPolicy + { + get + { + return req.ReqPolicy == null + ? null + : req.ReqPolicy.Id; + } + } + + public BigInteger Nonce + { + get + { + return req.Nonce == null + ? null + : req.Nonce.Value; + } + } + + public bool CertReq + { + get + { + return req.CertReq == null + ? false + : req.CertReq.IsTrue; + } + } + + /** + * Validate the timestamp request, checking the digest to see if it is of an + * accepted type and whether it is of the correct length for the algorithm specified. + * + * @param algorithms a set of string OIDS giving accepted algorithms. + * @param policies if non-null a set of policies we are willing to sign under. + * @param extensions if non-null a set of extensions we are willing to accept. + * @throws TspException if the request is invalid, or processing fails. + */ + public void Validate( + IList algorithms, + IList policies, + IList extensions) + { + if (!algorithms.Contains(this.MessageImprintAlgOid)) + { + throw new TspValidationException("request contains unknown algorithm.", PkiFailureInfo.BadAlg); + } + + if (policies != null && this.ReqPolicy != null && !policies.Contains(this.ReqPolicy)) + { + throw new TspValidationException("request contains unknown policy.", PkiFailureInfo.UnacceptedPolicy); + } + + if (this.Extensions != null && extensions != null) + { + foreach (DerObjectIdentifier oid in this.Extensions.ExtensionOids) + { + if (!extensions.Contains(oid.Id)) + { + throw new TspValidationException("request contains unknown extension.", + PkiFailureInfo.UnacceptedExtension); + } + } + } + + int digestLength = TspUtil.GetDigestLength(this.MessageImprintAlgOid); + + if (digestLength != this.GetMessageImprintDigest().Length) + { + throw new TspValidationException("imprint digest the wrong length.", + PkiFailureInfo.BadDataFormat); + } + } + + /** + * return the ASN.1 encoded representation of this object. + */ + public byte[] GetEncoded() + { + return req.GetEncoded(); + } + + internal X509Extensions Extensions + { + get { return req.Extensions; } + } + + public virtual bool HasExtensions + { + get { return extensions != null; } + } + + public virtual X509Extension GetExtension(DerObjectIdentifier oid) + { + return extensions == null ? null : extensions.GetExtension(oid); + } + + public virtual IList GetExtensionOids() + { + return TspUtil.GetExtensionOids(extensions); + } + + protected override X509Extensions GetX509Extensions() + { + return Extensions; + } + } +} diff --git a/crypto/src/tsp/TimeStampRequestGenerator.cs b/crypto/src/tsp/TimeStampRequestGenerator.cs new file mode 100644 index 000000000..2c698e476 --- /dev/null +++ b/crypto/src/tsp/TimeStampRequestGenerator.cs @@ -0,0 +1,139 @@ +using System; +using System.Collections; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Tsp; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Math; + +using Org.BouncyCastle.Utilities; + +namespace Org.BouncyCastle.Tsp +{ + /** + * Generator for RFC 3161 Time Stamp Request objects. + */ + public class TimeStampRequestGenerator + { + private DerObjectIdentifier reqPolicy; + + private DerBoolean certReq; + + private IDictionary extensions = Platform.CreateHashtable(); + private IList extOrdering = Platform.CreateArrayList(); + + public void SetReqPolicy( + string reqPolicy) + { + this.reqPolicy = new DerObjectIdentifier(reqPolicy); + } + + public void SetCertReq( + bool certReq) + { + this.certReq = DerBoolean.GetInstance(certReq); + } + + /** + * add a given extension field for the standard extensions tag (tag 3) + * @throws IOException + */ + [Obsolete("Use method taking DerObjectIdentifier")] + public void AddExtension( + string oid, + bool critical, + Asn1Encodable value) + { + this.AddExtension(oid, critical, value.GetEncoded()); + } + + /** + * add a given extension field for the standard extensions tag + * The value parameter becomes the contents of the octet string associated + * with the extension. + */ + [Obsolete("Use method taking DerObjectIdentifier")] + public void AddExtension( + string oid, + bool critical, + byte[] value) + { + DerObjectIdentifier derOid = new DerObjectIdentifier(oid); + extensions[derOid] = new X509Extension(critical, new DerOctetString(value)); + extOrdering.Add(derOid); + } + + /** + * add a given extension field for the standard extensions tag (tag 3) + * @throws IOException + */ + public virtual void AddExtension( + DerObjectIdentifier oid, + bool critical, + Asn1Encodable extValue) + { + this.AddExtension(oid, critical, extValue.GetEncoded()); + } + + /** + * add a given extension field for the standard extensions tag + * The value parameter becomes the contents of the octet string associated + * with the extension. + */ + public virtual void AddExtension( + DerObjectIdentifier oid, + bool critical, + byte[] extValue) + { + extensions.Add(oid, new X509Extension(critical, new DerOctetString(extValue))); + extOrdering.Add(oid); + } + + public TimeStampRequest Generate( + string digestAlgorithm, + byte[] digest) + { + return this.Generate(digestAlgorithm, digest, null); + } + + public TimeStampRequest Generate( + string digestAlgorithmOid, + byte[] digest, + BigInteger nonce) + { + if (digestAlgorithmOid == null) + { + throw new ArgumentException("No digest algorithm specified"); + } + + DerObjectIdentifier digestAlgOid = new DerObjectIdentifier(digestAlgorithmOid); + + AlgorithmIdentifier algID = new AlgorithmIdentifier(digestAlgOid, DerNull.Instance); + MessageImprint messageImprint = new MessageImprint(algID, digest); + + X509Extensions ext = null; + + if (extOrdering.Count != 0) + { + ext = new X509Extensions(extOrdering, extensions); + } + + DerInteger derNonce = nonce == null + ? null + : new DerInteger(nonce); + + return new TimeStampRequest( + new TimeStampReq(messageImprint, reqPolicy, derNonce, certReq, ext)); + } + + public virtual TimeStampRequest Generate(DerObjectIdentifier digestAlgorithm, byte[] digest) + { + return Generate(digestAlgorithm.Id, digest); + } + + public virtual TimeStampRequest Generate(DerObjectIdentifier digestAlgorithm, byte[] digest, BigInteger nonce) + { + return Generate(digestAlgorithm.Id, digest, nonce); + } + } +} diff --git a/crypto/src/tsp/TimeStampResponse.cs b/crypto/src/tsp/TimeStampResponse.cs new file mode 100644 index 000000000..069521111 --- /dev/null +++ b/crypto/src/tsp/TimeStampResponse.cs @@ -0,0 +1,184 @@ +using System; +using System.IO; +using System.Text; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cmp; +using Org.BouncyCastle.Asn1.Pkcs; +using Org.BouncyCastle.Asn1.Tsp; +using Org.BouncyCastle.Utilities; + +namespace Org.BouncyCastle.Tsp +{ + /** + * Base class for an RFC 3161 Time Stamp Response object. + */ + public class TimeStampResponse + { + private TimeStampResp resp; + private TimeStampToken timeStampToken; + + public TimeStampResponse( + TimeStampResp resp) + { + this.resp = resp; + + if (resp.TimeStampToken != null) + { + timeStampToken = new TimeStampToken(resp.TimeStampToken); + } + } + + /** + * Create a TimeStampResponse from a byte array containing an ASN.1 encoding. + * + * @param resp the byte array containing the encoded response. + * @throws TspException if the response is malformed. + * @throws IOException if the byte array doesn't represent an ASN.1 encoding. + */ + public TimeStampResponse( + byte[] resp) + : this(readTimeStampResp(new Asn1InputStream(resp))) + { + } + + /** + * Create a TimeStampResponse from an input stream containing an ASN.1 encoding. + * + * @param input the input stream containing the encoded response. + * @throws TspException if the response is malformed. + * @throws IOException if the stream doesn't represent an ASN.1 encoding. + */ + public TimeStampResponse( + Stream input) + : this(readTimeStampResp(new Asn1InputStream(input))) + { + } + + private static TimeStampResp readTimeStampResp( + Asn1InputStream input) + { + try + { + return TimeStampResp.GetInstance(input.ReadObject()); + } + catch (ArgumentException e) + { + throw new TspException("malformed timestamp response: " + e, e); + } + catch (InvalidCastException e) + { + throw new TspException("malformed timestamp response: " + e, e); + } + } + + public int Status + { + get { return resp.Status.Status.IntValue; } + } + + public string GetStatusString() + { + if (resp.Status.StatusString == null) + { + return null; + } + + StringBuilder statusStringBuf = new StringBuilder(); + PkiFreeText text = resp.Status.StatusString; + for (int i = 0; i != text.Count; i++) + { + statusStringBuf.Append(text[i].GetString()); + } + + return statusStringBuf.ToString(); + } + + public PkiFailureInfo GetFailInfo() + { + if (resp.Status.FailInfo == null) + { + return null; + } + + return new PkiFailureInfo(resp.Status.FailInfo); + } + + public TimeStampToken TimeStampToken + { + get { return timeStampToken; } + } + + /** + * Check this response against to see if it a well formed response for + * the passed in request. Validation will include checking the time stamp + * token if the response status is GRANTED or GRANTED_WITH_MODS. + * + * @param request the request to be checked against + * @throws TspException if the request can not match this response. + */ + public void Validate( + TimeStampRequest request) + { + TimeStampToken tok = this.TimeStampToken; + + if (tok != null) + { + TimeStampTokenInfo tstInfo = tok.TimeStampInfo; + + if (request.Nonce != null && !request.Nonce.Equals(tstInfo.Nonce)) + { + throw new TspValidationException("response contains wrong nonce value."); + } + + if (this.Status != (int) PkiStatus.Granted && this.Status != (int) PkiStatus.GrantedWithMods) + { + throw new TspValidationException("time stamp token found in failed request."); + } + + if (!Arrays.ConstantTimeAreEqual(request.GetMessageImprintDigest(), tstInfo.GetMessageImprintDigest())) + { + throw new TspValidationException("response for different message imprint digest."); + } + + if (!tstInfo.MessageImprintAlgOid.Equals(request.MessageImprintAlgOid)) + { + throw new TspValidationException("response for different message imprint algorithm."); + } + + Asn1.Cms.Attribute scV1 = tok.SignedAttributes[PkcsObjectIdentifiers.IdAASigningCertificate]; + Asn1.Cms.Attribute scV2 = tok.SignedAttributes[PkcsObjectIdentifiers.IdAASigningCertificateV2]; + + if (scV1 == null && scV2 == null) + { + throw new TspValidationException("no signing certificate attribute present."); + } + + if (scV1 != null && scV2 != null) + { + /* + * RFC 5035 5.4. If both attributes exist in a single message, + * they are independently evaluated. + */ + } + + if (request.ReqPolicy != null && !request.ReqPolicy.Equals(tstInfo.Policy)) + { + throw new TspValidationException("TSA policy wrong for request."); + } + } + else if (this.Status == (int) PkiStatus.Granted || this.Status == (int) PkiStatus.GrantedWithMods) + { + throw new TspValidationException("no time stamp token found and one expected."); + } + } + + /** + * return the ASN.1 encoded representation of this object. + */ + public byte[] GetEncoded() + { + return resp.GetEncoded(); + } + } +} diff --git a/crypto/src/tsp/TimeStampResponseGenerator.cs b/crypto/src/tsp/TimeStampResponseGenerator.cs new file mode 100644 index 000000000..8d798de67 --- /dev/null +++ b/crypto/src/tsp/TimeStampResponseGenerator.cs @@ -0,0 +1,210 @@ +using System; +using System.Collections; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Cmp; +using Org.BouncyCastle.Asn1.Cms; +using Org.BouncyCastle.Asn1.Tsp; +using Org.BouncyCastle.Math; +using Org.BouncyCastle.Utilities.Date; + +namespace Org.BouncyCastle.Tsp +{ + /** + * Generator for RFC 3161 Time Stamp Responses. + */ + public class TimeStampResponseGenerator + { + private PkiStatus status; + + private Asn1EncodableVector statusStrings; + + private int failInfo; + private TimeStampTokenGenerator tokenGenerator; + private IList acceptedAlgorithms; + private IList acceptedPolicies; + private IList acceptedExtensions; + + public TimeStampResponseGenerator( + TimeStampTokenGenerator tokenGenerator, + IList acceptedAlgorithms) + : this(tokenGenerator, acceptedAlgorithms, null, null) + { + } + + public TimeStampResponseGenerator( + TimeStampTokenGenerator tokenGenerator, + IList acceptedAlgorithms, + IList acceptedPolicy) + : this(tokenGenerator, acceptedAlgorithms, acceptedPolicy, null) + { + } + + public TimeStampResponseGenerator( + TimeStampTokenGenerator tokenGenerator, + IList acceptedAlgorithms, + IList acceptedPolicies, + IList acceptedExtensions) + { + this.tokenGenerator = tokenGenerator; + this.acceptedAlgorithms = acceptedAlgorithms; + this.acceptedPolicies = acceptedPolicies; + this.acceptedExtensions = acceptedExtensions; + + statusStrings = new Asn1EncodableVector(); + } + + private void AddStatusString(string statusString) + { + statusStrings.Add(new DerUtf8String(statusString)); + } + + private void SetFailInfoField(int field) + { + failInfo |= field; + } + + private PkiStatusInfo GetPkiStatusInfo() + { + Asn1EncodableVector v = new Asn1EncodableVector( + new DerInteger((int)status)); + + if (statusStrings.Count > 0) + { + v.Add(new PkiFreeText(new DerSequence(statusStrings))); + } + + if (failInfo != 0) + { + v.Add(new FailInfo(failInfo)); + } + + return new PkiStatusInfo(new DerSequence(v)); + } + + public TimeStampResponse Generate( + TimeStampRequest request, + BigInteger serialNumber, + DateTime genTime) + { + return Generate(request, serialNumber, new DateTimeObject(genTime)); + } + + /** + * Return an appropriate TimeStampResponse. + * <p> + * If genTime is null a timeNotAvailable error response will be returned. + * + * @param request the request this response is for. + * @param serialNumber serial number for the response token. + * @param genTime generation time for the response token. + * @param provider provider to use for signature calculation. + * @return + * @throws NoSuchAlgorithmException + * @throws NoSuchProviderException + * @throws TSPException + * </p> + */ + public TimeStampResponse Generate( + TimeStampRequest request, + BigInteger serialNumber, + DateTimeObject genTime) + { + TimeStampResp resp; + + try + { + if (genTime == null) + throw new TspValidationException("The time source is not available.", + PkiFailureInfo.TimeNotAvailable); + + request.Validate(acceptedAlgorithms, acceptedPolicies, acceptedExtensions); + + this.status = PkiStatus.Granted; + this.AddStatusString("Operation Okay"); + + PkiStatusInfo pkiStatusInfo = GetPkiStatusInfo(); + + ContentInfo tstTokenContentInfo; + try + { + TimeStampToken token = tokenGenerator.Generate(request, serialNumber, genTime.Value); + byte[] encoded = token.ToCmsSignedData().GetEncoded(); + + tstTokenContentInfo = ContentInfo.GetInstance(Asn1Object.FromByteArray(encoded)); + } + catch (IOException e) + { + throw new TspException("Timestamp token received cannot be converted to ContentInfo", e); + } + + resp = new TimeStampResp(pkiStatusInfo, tstTokenContentInfo); + } + catch (TspValidationException e) + { + status = PkiStatus.Rejection; + + this.SetFailInfoField(e.FailureCode); + this.AddStatusString(e.Message); + + PkiStatusInfo pkiStatusInfo = GetPkiStatusInfo(); + + resp = new TimeStampResp(pkiStatusInfo, null); + } + + try + { + return new TimeStampResponse(resp); + } + catch (IOException e) + { + throw new TspException("created badly formatted response!", e); + } + } + + class FailInfo + : DerBitString + { + internal FailInfo( + int failInfoValue) + : base(GetBytes(failInfoValue), GetPadBits(failInfoValue)) + { + } + } + + /** + * Generate a TimeStampResponse with chosen status and FailInfoField. + * + * @param status the PKIStatus to set. + * @param failInfoField the FailInfoField to set. + * @param statusString an optional string describing the failure. + * @return a TimeStampResponse with a failInfoField and optional statusString + * @throws TSPException in case the response could not be created + */ + public TimeStampResponse GenerateFailResponse(PkiStatus status, int failInfoField, string statusString) + { + this.status = status; + + this.SetFailInfoField(failInfoField); + + if (statusString != null) + { + this.AddStatusString(statusString); + } + + PkiStatusInfo pkiStatusInfo = GetPkiStatusInfo(); + + TimeStampResp resp = new TimeStampResp(pkiStatusInfo, null); + + try + { + return new TimeStampResponse(resp); + } + catch (IOException e) + { + throw new TspException("created badly formatted response!", e); + } + } + } +} diff --git a/crypto/src/tsp/TimeStampToken.cs b/crypto/src/tsp/TimeStampToken.cs new file mode 100644 index 000000000..51a9592dc --- /dev/null +++ b/crypto/src/tsp/TimeStampToken.cs @@ -0,0 +1,305 @@ +using System; +using System.Collections; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Ess; +using Org.BouncyCastle.Asn1.Nist; +using Org.BouncyCastle.Asn1.Oiw; +using Org.BouncyCastle.Asn1.Pkcs; +using Org.BouncyCastle.Asn1.Tsp; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Cms; +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.Tsp +{ + public class TimeStampToken + { + private readonly CmsSignedData tsToken; + private readonly SignerInformation tsaSignerInfo; +// private readonly DateTime genTime; + private readonly TimeStampTokenInfo tstInfo; + private readonly CertID certID; + + public TimeStampToken( + Asn1.Cms.ContentInfo contentInfo) + : this(new CmsSignedData(contentInfo)) + { + } + + public TimeStampToken( + CmsSignedData signedData) + { + this.tsToken = signedData; + + if (!this.tsToken.SignedContentType.Equals(PkcsObjectIdentifiers.IdCTTstInfo)) + { + throw new TspValidationException("ContentInfo object not for a time stamp."); + } + + ICollection signers = tsToken.GetSignerInfos().GetSigners(); + + if (signers.Count != 1) + { + throw new ArgumentException("Time-stamp token signed by " + + signers.Count + + " signers, but it must contain just the TSA signature."); + } + + + IEnumerator signerEnum = signers.GetEnumerator(); + + signerEnum.MoveNext(); + tsaSignerInfo = (SignerInformation) signerEnum.Current; + + try + { + CmsProcessable content = tsToken.SignedContent; + MemoryStream bOut = new MemoryStream(); + + content.Write(bOut); + + this.tstInfo = new TimeStampTokenInfo( + TstInfo.GetInstance( + Asn1Object.FromByteArray(bOut.ToArray()))); + + Asn1.Cms.Attribute attr = tsaSignerInfo.SignedAttributes[ + PkcsObjectIdentifiers.IdAASigningCertificate]; + +// if (attr == null) +// { +// throw new TspValidationException( +// "no signing certificate attribute found, time stamp invalid."); +// } +// +// SigningCertificate signCert = SigningCertificate.GetInstance( +// attr.AttrValues[0]); +// +// this.certID = EssCertID.GetInstance(signCert.GetCerts()[0]); + + if (attr != null) + { + SigningCertificate signCert = SigningCertificate.GetInstance(attr.AttrValues[0]); + + this.certID = new CertID(EssCertID.GetInstance(signCert.GetCerts()[0])); + } + else + { + attr = tsaSignerInfo.SignedAttributes[PkcsObjectIdentifiers.IdAASigningCertificateV2]; + + if (attr == null) + throw new TspValidationException("no signing certificate attribute found, time stamp invalid."); + + SigningCertificateV2 signCertV2 = SigningCertificateV2.GetInstance(attr.AttrValues[0]); + + this.certID = new CertID(EssCertIDv2.GetInstance(signCertV2.GetCerts()[0])); + } + } + catch (CmsException e) + { + throw new TspException(e.Message, e.InnerException); + } + } + + public TimeStampTokenInfo TimeStampInfo + { + get { return tstInfo; } + } + + public SignerID SignerID + { + get { return tsaSignerInfo.SignerID; } + } + + public Asn1.Cms.AttributeTable SignedAttributes + { + get { return tsaSignerInfo.SignedAttributes; } + } + + public Asn1.Cms.AttributeTable UnsignedAttributes + { + get { return tsaSignerInfo.UnsignedAttributes; } + } + + public IX509Store GetCertificates( + string type) + { + return tsToken.GetCertificates(type); + } + + public IX509Store GetCrls( + string type) + { + return tsToken.GetCrls(type); + } + + public IX509Store GetAttributeCertificates( + string type) + { + return tsToken.GetAttributeCertificates(type); + } + + /** + * Validate the time stamp token. + * <p> + * To be valid the token must be signed by the passed in certificate and + * the certificate must be the one referred to by the SigningCertificate + * attribute included in the hashed attributes of the token. The + * certificate must also have the ExtendedKeyUsageExtension with only + * KeyPurposeID.IdKPTimeStamping and have been valid at the time the + * timestamp was created. + * </p> + * <p> + * A successful call to validate means all the above are true. + * </p> + */ + public void Validate( + X509Certificate cert) + { + try + { + byte[] hash = DigestUtilities.CalculateDigest( + certID.GetHashAlgorithmName(), cert.GetEncoded()); + + if (!Arrays.ConstantTimeAreEqual(certID.GetCertHash(), hash)) + { + throw new TspValidationException("certificate hash does not match certID hash."); + } + + if (certID.IssuerSerial != null) + { + if (!certID.IssuerSerial.Serial.Value.Equals(cert.SerialNumber)) + { + throw new TspValidationException("certificate serial number does not match certID for signature."); + } + + GeneralName[] names = certID.IssuerSerial.Issuer.GetNames(); + X509Name principal = PrincipalUtilities.GetIssuerX509Principal(cert); + bool found = false; + + for (int i = 0; i != names.Length; i++) + { + if (names[i].TagNo == 4 + && X509Name.GetInstance(names[i].Name).Equivalent(principal)) + { + found = true; + break; + } + } + + if (!found) + { + throw new TspValidationException("certificate name does not match certID for signature. "); + } + } + + TspUtil.ValidateCertificate(cert); + + cert.CheckValidity(tstInfo.GenTime); + + if (!tsaSignerInfo.Verify(cert)) + { + throw new TspValidationException("signature not created by certificate."); + } + } + catch (CmsException e) + { + if (e.InnerException != null) + { + throw new TspException(e.Message, e.InnerException); + } + + throw new TspException("CMS exception: " + e, e); + } + catch (CertificateEncodingException e) + { + throw new TspException("problem processing certificate: " + e, e); + } + catch (SecurityUtilityException e) + { + throw new TspException("cannot find algorithm: " + e.Message, e); + } + } + + /** + * Return the underlying CmsSignedData object. + * + * @return the underlying CMS structure. + */ + public CmsSignedData ToCmsSignedData() + { + return tsToken; + } + + /** + * Return a ASN.1 encoded byte stream representing the encoded object. + * + * @throws IOException if encoding fails. + */ + public byte[] GetEncoded() + { + return tsToken.GetEncoded(); + } + + + // perhaps this should be done using an interface on the ASN.1 classes... + private class CertID + { + private EssCertID certID; + private EssCertIDv2 certIDv2; + + internal CertID(EssCertID certID) + { + this.certID = certID; + this.certIDv2 = null; + } + + internal CertID(EssCertIDv2 certID) + { + this.certIDv2 = certID; + this.certID = null; + } + + public string GetHashAlgorithmName() + { + if (certID != null) + return "SHA-1"; + + if (NistObjectIdentifiers.IdSha256.Equals(certIDv2.HashAlgorithm.ObjectID)) + return "SHA-256"; + + return certIDv2.HashAlgorithm.ObjectID.Id; + } + + public AlgorithmIdentifier GetHashAlgorithm() + { + return (certID != null) + ? new AlgorithmIdentifier(OiwObjectIdentifiers.IdSha1) + : certIDv2.HashAlgorithm; + } + + public byte[] GetCertHash() + { + return certID != null + ? certID.GetCertHash() + : certIDv2.GetCertHash(); + } + + public IssuerSerial IssuerSerial + { + get + { + return certID != null + ? certID.IssuerSerial + : certIDv2.IssuerSerial; + } + } + } + } +} diff --git a/crypto/src/tsp/TimeStampTokenGenerator.cs b/crypto/src/tsp/TimeStampTokenGenerator.cs new file mode 100644 index 000000000..07eddd4b9 --- /dev/null +++ b/crypto/src/tsp/TimeStampTokenGenerator.cs @@ -0,0 +1,245 @@ +using System; +using System.Collections; +using System.IO; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Asn1.Ess; +using Org.BouncyCastle.Asn1.Pkcs; +using Org.BouncyCastle.Asn1.Tsp; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Cms; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Math; +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.Tsp +{ + public class TimeStampTokenGenerator + { + private int accuracySeconds = -1; + private int accuracyMillis = -1; + private int accuracyMicros = -1; + private bool ordering = false; + private GeneralName tsa = null; + private string tsaPolicyOID; + + private AsymmetricKeyParameter key; + private X509Certificate cert; + private string digestOID; + private Asn1.Cms.AttributeTable signedAttr; + private Asn1.Cms.AttributeTable unsignedAttr; + private IX509Store x509Certs; + private IX509Store x509Crls; + + /** + * basic creation - only the default attributes will be included here. + */ + public TimeStampTokenGenerator( + AsymmetricKeyParameter key, + X509Certificate cert, + string digestOID, + string tsaPolicyOID) + : this(key, cert, digestOID, tsaPolicyOID, null, null) + { + } + + /** + * create with a signer with extra signed/unsigned attributes. + */ + public TimeStampTokenGenerator( + AsymmetricKeyParameter key, + X509Certificate cert, + string digestOID, + string tsaPolicyOID, + Asn1.Cms.AttributeTable signedAttr, + Asn1.Cms.AttributeTable unsignedAttr) + { + this.key = key; + this.cert = cert; + this.digestOID = digestOID; + this.tsaPolicyOID = tsaPolicyOID; + this.unsignedAttr = unsignedAttr; + + TspUtil.ValidateCertificate(cert); + + // + // Add the ESSCertID attribute + // + IDictionary signedAttrs; + if (signedAttr != null) + { + signedAttrs = signedAttr.ToDictionary(); + } + else + { + signedAttrs = Platform.CreateHashtable(); + } + + try + { + byte[] hash = DigestUtilities.CalculateDigest("SHA-1", cert.GetEncoded()); + + EssCertID essCertid = new EssCertID(hash); + + Asn1.Cms.Attribute attr = new Asn1.Cms.Attribute( + PkcsObjectIdentifiers.IdAASigningCertificate, + new DerSet(new SigningCertificate(essCertid))); + + signedAttrs[attr.AttrType] = attr; + } + catch (CertificateEncodingException e) + { + throw new TspException("Exception processing certificate.", e); + } + catch (SecurityUtilityException e) + { + throw new TspException("Can't find a SHA-1 implementation.", e); + } + + this.signedAttr = new Asn1.Cms.AttributeTable(signedAttrs); + } + + public void SetCertificates( + IX509Store certificates) + { + this.x509Certs = certificates; + } + + public void SetCrls( + IX509Store crls) + { + this.x509Crls = crls; + } + + public void SetAccuracySeconds( + int accuracySeconds) + { + this.accuracySeconds = accuracySeconds; + } + + public void SetAccuracyMillis( + int accuracyMillis) + { + this.accuracyMillis = accuracyMillis; + } + + public void SetAccuracyMicros( + int accuracyMicros) + { + this.accuracyMicros = accuracyMicros; + } + + public void SetOrdering( + bool ordering) + { + this.ordering = ordering; + } + + public void SetTsa( + GeneralName tsa) + { + this.tsa = tsa; + } + + //------------------------------------------------------------------------------ + + public TimeStampToken Generate( + TimeStampRequest request, + BigInteger serialNumber, + DateTime genTime) + { + DerObjectIdentifier digestAlgOID = new DerObjectIdentifier(request.MessageImprintAlgOid); + + AlgorithmIdentifier algID = new AlgorithmIdentifier(digestAlgOID, DerNull.Instance); + MessageImprint messageImprint = new MessageImprint(algID, request.GetMessageImprintDigest()); + + Accuracy accuracy = null; + if (accuracySeconds > 0 || accuracyMillis > 0 || accuracyMicros > 0) + { + DerInteger seconds = null; + if (accuracySeconds > 0) + { + seconds = new DerInteger(accuracySeconds); + } + + DerInteger millis = null; + if (accuracyMillis > 0) + { + millis = new DerInteger(accuracyMillis); + } + + DerInteger micros = null; + if (accuracyMicros > 0) + { + micros = new DerInteger(accuracyMicros); + } + + accuracy = new Accuracy(seconds, millis, micros); + } + + DerBoolean derOrdering = null; + if (ordering) + { + derOrdering = DerBoolean.GetInstance(ordering); + } + + DerInteger nonce = null; + if (request.Nonce != null) + { + nonce = new DerInteger(request.Nonce); + } + + DerObjectIdentifier tsaPolicy = new DerObjectIdentifier(tsaPolicyOID); + if (request.ReqPolicy != null) + { + tsaPolicy = new DerObjectIdentifier(request.ReqPolicy); + } + + TstInfo tstInfo = new TstInfo(tsaPolicy, messageImprint, + new DerInteger(serialNumber), new DerGeneralizedTime(genTime), accuracy, + derOrdering, nonce, tsa, request.Extensions); + + try + { + CmsSignedDataGenerator signedDataGenerator = new CmsSignedDataGenerator(); + + byte[] derEncodedTstInfo = tstInfo.GetDerEncoded(); + + if (request.CertReq) + { + signedDataGenerator.AddCertificates(x509Certs); + } + + signedDataGenerator.AddCrls(x509Crls); + signedDataGenerator.AddSigner(key, cert, digestOID, signedAttr, unsignedAttr); + + CmsSignedData signedData = signedDataGenerator.Generate( + PkcsObjectIdentifiers.IdCTTstInfo.Id, + new CmsProcessableByteArray(derEncodedTstInfo), + true); + + return new TimeStampToken(signedData); + } + catch (CmsException cmsEx) + { + throw new TspException("Error generating time-stamp token", cmsEx); + } + catch (IOException e) + { + throw new TspException("Exception encoding info", e); + } + catch (X509StoreException e) + { + throw new TspException("Exception handling CertStore", e); + } +// catch (InvalidAlgorithmParameterException e) +// { +// throw new TspException("Exception handling CertStore CRLs", e); +// } + } + } +} diff --git a/crypto/src/tsp/TimeStampTokenInfo.cs b/crypto/src/tsp/TimeStampTokenInfo.cs new file mode 100644 index 000000000..5027a87c4 --- /dev/null +++ b/crypto/src/tsp/TimeStampTokenInfo.cs @@ -0,0 +1,107 @@ +using System; + +using Org.BouncyCastle.Asn1.Tsp; +using Org.BouncyCastle.Asn1.X509; +using Org.BouncyCastle.Math; + +namespace Org.BouncyCastle.Tsp +{ + public class TimeStampTokenInfo + { + private TstInfo tstInfo; + private DateTime genTime; + + public TimeStampTokenInfo( + TstInfo tstInfo) + { + this.tstInfo = tstInfo; + + try + { + this.genTime = tstInfo.GenTime.ToDateTime(); + } + catch (Exception e) + { + throw new TspException("unable to parse genTime field: " + e.Message); + } + } + + public bool IsOrdered + { + get { return tstInfo.Ordering.IsTrue; } + } + + public Accuracy Accuracy + { + get { return tstInfo.Accuracy; } + } + + public DateTime GenTime + { + get { return genTime; } + } + + public GenTimeAccuracy GenTimeAccuracy + { + get + { + return this.Accuracy == null + ? null + : new GenTimeAccuracy(this.Accuracy); + } + } + + public string Policy + { + get { return tstInfo.Policy.Id; } + } + + public BigInteger SerialNumber + { + get { return tstInfo.SerialNumber.Value; } + } + + public GeneralName Tsa + { + get { return tstInfo.Tsa; } + } + + /** + * @return the nonce value, null if there isn't one. + */ + public BigInteger Nonce + { + get + { + return tstInfo.Nonce == null + ? null + : tstInfo.Nonce.Value; + } + } + + public AlgorithmIdentifier HashAlgorithm + { + get { return tstInfo.MessageImprint.HashAlgorithm; } + } + + public string MessageImprintAlgOid + { + get { return tstInfo.MessageImprint.HashAlgorithm.ObjectID.Id; } + } + + public byte[] GetMessageImprintDigest() + { + return tstInfo.MessageImprint.GetHashedMessage(); + } + + public byte[] GetEncoded() + { + return tstInfo.GetEncoded(); + } + + public TstInfo TstInfo + { + get { return tstInfo; } + } + } +} |