diff options
Diffstat (limited to 'crypto/src/tsp/TimeStampTokenGenerator.cs')
| -rw-r--r-- | crypto/src/tsp/TimeStampTokenGenerator.cs | 245 |
1 files changed, 245 insertions, 0 deletions
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); +// } + } + } +} |