public Object ParseObject(PemObject obj) { try { Object param = Asn1Object.FromByteArray(obj.GetContent()); if (param is DerObjectIdentifier) { return(Asn1Object.FromByteArray(obj.GetContent())); } else if (param is Asn1Sequence) { return(X9ECParameters.GetInstance(param)); } else { return(null); // implicitly CA } } catch (IOException e) { throw e; } catch (Exception e) { throw new OpenSslPemParsingException("exception extracting EC named curve: " + e.ToString()); } }
static internal ECDomainParameters DecodeCurveParameters(AlgorithmIdentifier algId) { if (!algId.Algorithm.Equals(X9ObjectIdentifiers.IdECPublicKey)) { throw new ArgumentException("Unknown algorithm type: " + algId.Algorithm); } X962Parameters parameters = X962Parameters.GetInstance(algId.Parameters); X9ECParameters x9; if (parameters.IsNamedCurve) { DerObjectIdentifier oid = (DerObjectIdentifier)parameters.Parameters; x9 = CustomNamedCurves.GetByOid(oid); if (x9 == null) { x9 = ECNamedCurveTable.GetByOid(oid); } return(new NamedECDomainParameters(oid, x9.Curve, x9.G, x9.N, x9.H, x9.GetSeed())); } else if (!parameters.IsImplicitlyCA) { x9 = X9ECParameters.GetInstance(parameters.Parameters); return(new ECDomainParameters(x9.Curve, x9.G, x9.N, x9.H, x9.GetSeed())); } else { return(null); //return new ECImplicitDomainParameters(CryptoServicesRegistrar.<ECDomainParameters>getProperty(CryptoServicesRegistrar.Property.EC_IMPLICITLY_CA)); } }
public static AsymmetricKeyParameter CreateKey( PrivateKeyInfo keyInfo) { AlgorithmIdentifier algID = keyInfo.PrivateKeyAlgorithm; DerObjectIdentifier algOid = algID.Algorithm; // TODO See RSAUtil.isRsaOid in Java build if (algOid.Equals(PkcsObjectIdentifiers.RsaEncryption) || algOid.Equals(X509ObjectIdentifiers.IdEARsa) || algOid.Equals(PkcsObjectIdentifiers.IdRsassaPss) || algOid.Equals(PkcsObjectIdentifiers.IdRsaesOaep)) { RsaPrivateKeyStructure keyStructure = RsaPrivateKeyStructure.GetInstance(keyInfo.ParsePrivateKey()); return(new RsaPrivateCrtKeyParameters( keyStructure.Modulus, keyStructure.PublicExponent, keyStructure.PrivateExponent, keyStructure.Prime1, keyStructure.Prime2, keyStructure.Exponent1, keyStructure.Exponent2, keyStructure.Coefficient)); } // TODO? // else if (algOid.Equals(X9ObjectIdentifiers.DHPublicNumber)) else if (algOid.Equals(PkcsObjectIdentifiers.DhKeyAgreement)) { DHParameter para = new DHParameter( Asn1Sequence.GetInstance(algID.Parameters.ToAsn1Object())); DerInteger derX = (DerInteger)keyInfo.ParsePrivateKey(); BigInteger lVal = para.L; int l = lVal == null ? 0 : lVal.IntValue; DHParameters dhParams = new DHParameters(para.P, para.G, null, l); return(new DHPrivateKeyParameters(derX.Value, dhParams, algOid)); } else if (algOid.Equals(OiwObjectIdentifiers.ElGamalAlgorithm)) { ElGamalParameter para = new ElGamalParameter( Asn1Sequence.GetInstance(algID.Parameters.ToAsn1Object())); DerInteger derX = (DerInteger)keyInfo.ParsePrivateKey(); return(new ElGamalPrivateKeyParameters( derX.Value, new ElGamalParameters(para.P, para.G))); } else if (algOid.Equals(X9ObjectIdentifiers.IdDsa)) { DerInteger derX = (DerInteger)keyInfo.ParsePrivateKey(); Asn1Encodable ae = algID.Parameters; DsaParameters parameters = null; if (ae != null) { DsaParameter para = DsaParameter.GetInstance(ae.ToAsn1Object()); parameters = new DsaParameters(para.P, para.Q, para.G); } return(new DsaPrivateKeyParameters(derX.Value, parameters)); } else if (algOid.Equals(X9ObjectIdentifiers.IdECPublicKey)) { X962Parameters para = X962Parameters.GetInstance(algID.Parameters.ToAsn1Object()); X9ECParameters x9; if (para.IsNamedCurve) { x9 = ECKeyPairGenerator.FindECCurveByOid((DerObjectIdentifier)para.Parameters); } else { x9 = new X9ECParameters((Asn1Sequence)para.Parameters); } ECPrivateKeyStructure ec = ECPrivateKeyStructure.GetInstance(keyInfo.ParsePrivateKey()); BigInteger d = ec.GetKey(); if (para.IsNamedCurve) { return(new ECPrivateKeyParameters("EC", d, (DerObjectIdentifier)para.Parameters)); } ECDomainParameters dParams = new ECDomainParameters(x9.Curve, x9.G, x9.N, x9.H, x9.GetSeed()); return(new ECPrivateKeyParameters(d, dParams)); } else if (algOid.Equals(CryptoProObjectIdentifiers.GostR3410x2001)) { Gost3410PublicKeyAlgParameters gostParams = Gost3410PublicKeyAlgParameters.GetInstance( algID.Parameters.ToAsn1Object()); ECDomainParameters ecP = ECGost3410NamedCurves.GetByOid(gostParams.PublicKeyParamSet); if (ecP == null) { throw new ArgumentException("Unrecognized curve OID for GostR3410x2001 private key"); } Asn1Object privKey = keyInfo.ParsePrivateKey(); ECPrivateKeyStructure ec; if (privKey is DerInteger) { ec = new ECPrivateKeyStructure(ecP.N.BitLength, ((DerInteger)privKey).PositiveValue); } else { ec = ECPrivateKeyStructure.GetInstance(privKey); } return(new ECPrivateKeyParameters("ECGOST3410", ec.GetKey(), gostParams.PublicKeyParamSet)); } else if (algOid.Equals(CryptoProObjectIdentifiers.GostR3410x94)) { Gost3410PublicKeyAlgParameters gostParams = Gost3410PublicKeyAlgParameters.GetInstance(algID.Parameters); Asn1Object privKey = keyInfo.ParsePrivateKey(); BigInteger x; if (privKey is DerInteger) { x = DerInteger.GetInstance(privKey).PositiveValue; } else { x = new BigInteger(1, Arrays.Reverse(Asn1OctetString.GetInstance(privKey).GetOctets())); } return(new Gost3410PrivateKeyParameters(x, gostParams.PublicKeyParamSet)); } else if (algOid.Equals(EdECObjectIdentifiers.id_X25519)) { return(new X25519PrivateKeyParameters(GetRawKey(keyInfo, X25519PrivateKeyParameters.KeySize), 0)); } else if (algOid.Equals(EdECObjectIdentifiers.id_X448)) { return(new X448PrivateKeyParameters(GetRawKey(keyInfo, X448PrivateKeyParameters.KeySize), 0)); } else if (algOid.Equals(EdECObjectIdentifiers.id_Ed25519)) { return(new Ed25519PrivateKeyParameters(GetRawKey(keyInfo, Ed25519PrivateKeyParameters.KeySize), 0)); } else if (algOid.Equals(EdECObjectIdentifiers.id_Ed448)) { return(new Ed448PrivateKeyParameters(GetRawKey(keyInfo, Ed448PrivateKeyParameters.KeySize), 0)); } else if (algOid.Equals(RosstandartObjectIdentifiers.id_tc26_gost_3410_12_512) || algOid.Equals(RosstandartObjectIdentifiers.id_tc26_gost_3410_12_256)) { Gost3410PublicKeyAlgParameters gostParams = Gost3410PublicKeyAlgParameters.GetInstance(keyInfo.PrivateKeyAlgorithm.Parameters); ECGost3410Parameters ecSpec = null; BigInteger d = null; Asn1Object p = keyInfo.PrivateKeyAlgorithm.Parameters.ToAsn1Object(); if (p is Asn1Sequence && (Asn1Sequence.GetInstance(p).Count == 2 || Asn1Sequence.GetInstance(p).Count == 3)) { ECDomainParameters ecP = ECGost3410NamedCurves.GetByOid(gostParams.PublicKeyParamSet); ecSpec = new ECGost3410Parameters( new ECNamedDomainParameters( gostParams.PublicKeyParamSet, ecP), gostParams.PublicKeyParamSet, gostParams.DigestParamSet, gostParams.EncryptionParamSet); Asn1OctetString privEnc = keyInfo.PrivateKeyData; if (privEnc.GetOctets().Length == 32 || privEnc.GetOctets().Length == 64) { byte[] dVal = Arrays.Reverse(privEnc.GetOctets()); d = new BigInteger(1, dVal); } else { Asn1Encodable privKey = keyInfo.ParsePrivateKey(); if (privKey is DerInteger) { d = DerInteger.GetInstance(privKey).PositiveValue; } else { byte[] dVal = Arrays.Reverse(Asn1OctetString.GetInstance(privKey).GetOctets()); d = new BigInteger(1, dVal); } } } else { X962Parameters parameters = X962Parameters.GetInstance(keyInfo.PrivateKeyAlgorithm.Parameters); if (parameters.IsNamedCurve) { DerObjectIdentifier oid = DerObjectIdentifier.GetInstance(parameters.Parameters); X9ECParameters ecP = ECNamedCurveTable.GetByOid(oid); if (ecP == null) { ECDomainParameters gParam = ECGost3410NamedCurves.GetByOid(oid); ecSpec = new ECGost3410Parameters(new ECNamedDomainParameters( oid, gParam.Curve, gParam.G, gParam.N, gParam.H, gParam.GetSeed()), gostParams.PublicKeyParamSet, gostParams.DigestParamSet, gostParams.EncryptionParamSet); } else { ecSpec = new ECGost3410Parameters(new ECNamedDomainParameters( oid, ecP.Curve, ecP.G, ecP.N, ecP.H, ecP.GetSeed()), gostParams.PublicKeyParamSet, gostParams.DigestParamSet, gostParams.EncryptionParamSet); } } else if (parameters.IsImplicitlyCA) { ecSpec = null; } else { X9ECParameters ecP = X9ECParameters.GetInstance(parameters.Parameters); ecSpec = new ECGost3410Parameters(new ECNamedDomainParameters( algOid, ecP.Curve, ecP.G, ecP.N, ecP.H, ecP.GetSeed()), gostParams.PublicKeyParamSet, gostParams.DigestParamSet, gostParams.EncryptionParamSet); } Asn1Encodable privKey = keyInfo.ParsePrivateKey(); if (privKey is DerInteger) { DerInteger derD = DerInteger.GetInstance(privKey); d = derD.Value; } else { ECPrivateKeyStructure ec = ECPrivateKeyStructure.GetInstance(privKey); d = ec.GetKey(); } } return(new ECPrivateKeyParameters( d, new ECGost3410Parameters( ecSpec, gostParams.PublicKeyParamSet, gostParams.DigestParamSet, gostParams.EncryptionParamSet))); } else { throw new SecurityUtilityException("algorithm identifier in private key not recognised"); } }