Inheritance: Org.BouncyCastle.Asn1.Asn1Encodable, IAsn1Choice
Exemplo n.º 1
0
        private void EncodePrivateKey()
        {
            X9ECParameters ecP = X962NamedCurves.GetByOid(X9ObjectIdentifiers.Prime239v3);

            //
            // named curve
            //
            X962Parameters _params = new X962Parameters(X9ObjectIdentifiers.Prime192v1);

            X9ECPoint pPoint = new X9ECPoint(
                new FpPoint(ecP.Curve, new FpFieldElement(BigInteger.Two, BigInteger.One),
                new FpFieldElement(BigInteger.ValueOf(4), BigInteger.ValueOf(3)),
                true));

            Asn1OctetString p = (Asn1OctetString) pPoint.ToAsn1Object();

            if (p == null)
                Fail("failed to convert to ASN.1");

            PrivateKeyInfo info = new PrivateKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.IdECPublicKey, _params), new ECPrivateKeyStructure(BigInteger.Ten).ToAsn1Object());

            if (!Arrays.AreEqual(info.GetEncoded(), namedPriv))
            {
                Fail("failed private named generation");
            }

            Asn1Object o = Asn1Object.FromByteArray(namedPriv);

            if (!info.Equals(o))
            {
                Fail("failed private named equality");
            }

            //
            // explicit curve parameters
            //
            _params = new X962Parameters(ecP);

            info = new PrivateKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.IdECPublicKey, _params), new ECPrivateKeyStructure(BigInteger.ValueOf(20)).ToAsn1Object());

            if (!Arrays.AreEqual(info.GetEncoded(), expPriv))
            {
                Fail("failed private explicit generation");
            }

            o = Asn1Object.FromByteArray(expPriv);

            if (!info.Equals(o))
            {
                Fail("failed private explicit equality");
            }
        }
		/// <summary>
        /// Create a Subject Public Key Info object for a given public key.
        /// </summary>
        /// <param name="key">One of ElGammalPublicKeyParameters, DSAPublicKeyParameter, DHPublicKeyParameters, RsaKeyParameters or ECPublicKeyParameters</param>
        /// <returns>A subject public key info object.</returns>
        /// <exception cref="Exception">Throw exception if object provided is not one of the above.</exception>
        public static SubjectPublicKeyInfo CreateSubjectPublicKeyInfo(
			AsymmetricKeyParameter key)
        {
			if (key == null)
				throw new ArgumentNullException("key");
            if (key.IsPrivate)
                throw new ArgumentException("Private key passed - public key expected.", "key");

			if (key is ElGamalPublicKeyParameters)
            {
				ElGamalPublicKeyParameters _key = (ElGamalPublicKeyParameters)key;
				ElGamalParameters kp = _key.Parameters;

				SubjectPublicKeyInfo info = new SubjectPublicKeyInfo(
					new AlgorithmIdentifier(
						OiwObjectIdentifiers.ElGamalAlgorithm,
						new ElGamalParameter(kp.P, kp.G).ToAsn1Object()),
						new DerInteger(_key.Y));

				return info;
            }

			if (key is DsaPublicKeyParameters)
            {
                DsaPublicKeyParameters _key = (DsaPublicKeyParameters) key;
				DsaParameters kp = _key.Parameters;
				Asn1Encodable ae = kp == null
					?	null
					:	new DsaParameter(kp.P, kp.Q, kp.G).ToAsn1Object();

				return new SubjectPublicKeyInfo(
                    new AlgorithmIdentifier(X9ObjectIdentifiers.IdDsa, ae),
					new DerInteger(_key.Y));
            }

			if (key is DHPublicKeyParameters)
            {
                DHPublicKeyParameters _key = (DHPublicKeyParameters) key;
				DHParameters kp = _key.Parameters;

				SubjectPublicKeyInfo info = new SubjectPublicKeyInfo(
                    new AlgorithmIdentifier(
						X9ObjectIdentifiers.DHPublicNumber,
						new DHParameter(kp.P, kp.G, kp.L).ToAsn1Object()),
						new DerInteger(_key.Y));

				return info;
            } // End of DH

            if (key is RsaKeyParameters)
            {
                RsaKeyParameters _key = (RsaKeyParameters) key;

				SubjectPublicKeyInfo info = new SubjectPublicKeyInfo(
					new AlgorithmIdentifier(PkcsObjectIdentifiers.RsaEncryption, DerNull.Instance),
					new RsaPublicKeyStructure(_key.Modulus, _key.Exponent).ToAsn1Object());

				return info;
            } // End of RSA.

			if (key is ECPublicKeyParameters)
            {
                ECPublicKeyParameters _key = (ECPublicKeyParameters) key;

				if (_key.AlgorithmName == "ECGOST3410")
				{
					if (_key.PublicKeyParamSet == null)
						throw Platform.CreateNotImplementedException("Not a CryptoPro parameter set");

					ECPoint q = _key.Q;
					BigInteger bX = q.X.ToBigInteger();
					BigInteger bY = q.Y.ToBigInteger();

					byte[] encKey = new byte[64];
					ExtractBytes(encKey, 0, bX);
					ExtractBytes(encKey, 32, bY);

					Gost3410PublicKeyAlgParameters gostParams = new Gost3410PublicKeyAlgParameters(
						_key.PublicKeyParamSet, CryptoProObjectIdentifiers.GostR3411x94CryptoProParamSet);

					AlgorithmIdentifier algID = new AlgorithmIdentifier(
						CryptoProObjectIdentifiers.GostR3410x2001,
						gostParams.ToAsn1Object());

					return new SubjectPublicKeyInfo(algID, new DerOctetString(encKey));
				}
				else
				{
					ECDomainParameters kp = _key.Parameters;

					X9ECParameters ecP = new X9ECParameters(kp.Curve, kp.G, kp.N, kp.H, kp.GetSeed());
					X962Parameters x962 = new X962Parameters(ecP);
					Asn1OctetString p = (Asn1OctetString)(new X9ECPoint(_key.Q).ToAsn1Object());

					AlgorithmIdentifier algID = new AlgorithmIdentifier(
						X9ObjectIdentifiers.IdECPublicKey, x962.ToAsn1Object());

					return new SubjectPublicKeyInfo(algID, p.GetOctets());
				}
			} // End of EC

			if (key is Gost3410PublicKeyParameters)
			{
				Gost3410PublicKeyParameters _key = (Gost3410PublicKeyParameters) key;

				if (_key.PublicKeyParamSet == null)
					throw Platform.CreateNotImplementedException("Not a CryptoPro parameter set");

				byte[] keyEnc = _key.Y.ToByteArrayUnsigned();
				byte[] keyBytes = new byte[keyEnc.Length];

				for (int i = 0; i != keyBytes.Length; i++)
				{
					keyBytes[i] = keyEnc[keyEnc.Length - 1 - i]; // must be little endian
				}

				Gost3410PublicKeyAlgParameters algParams = new Gost3410PublicKeyAlgParameters(
					_key.PublicKeyParamSet, CryptoProObjectIdentifiers.GostR3411x94CryptoProParamSet);

				AlgorithmIdentifier algID = new AlgorithmIdentifier(
					CryptoProObjectIdentifiers.GostR3410x94,
					algParams.ToAsn1Object());

				return new SubjectPublicKeyInfo(algID, new DerOctetString(keyBytes));
			}

			throw new ArgumentException("Class provided no convertible: " + key.GetType().FullName);
		}
Exemplo n.º 3
0
        public static AsymmetricKeyParameter CreateKey(
			PrivateKeyInfo keyInfo)
        {
            AlgorithmIdentifier algID = keyInfo.AlgorithmID;
            if (algID.ObjectID.Equals(PkcsObjectIdentifiers.RsaEncryption))
            {
                RsaPrivateKeyStructure keyStructure = new RsaPrivateKeyStructure(
                    (Asn1Sequence)keyInfo.PrivateKey);
                return (new RsaPrivateCrtKeyParameters(
                    keyStructure.Modulus,
                    keyStructure.PublicExponent,
                    keyStructure.PrivateExponent,
                    keyStructure.Prime1,
                    keyStructure.Prime2,
                    keyStructure.Exponent1,
                    keyStructure.Exponent2,
                    keyStructure.Coefficient));
            }
            else if (algID.ObjectID.Equals(PkcsObjectIdentifiers.DhKeyAgreement))
            {
                DHParameter para = new DHParameter((Asn1Sequence)algID.Parameters);
                DerInteger derX = (DerInteger)keyInfo.PrivateKey;
                return new DHPrivateKeyParameters(derX.Value, new DHParameters(para.P, para.G));
            }
            else if (algID.ObjectID.Equals(OiwObjectIdentifiers.ElGamalAlgorithm))
            {
                ElGamalParameter  para = new ElGamalParameter((Asn1Sequence)algID.Parameters);
                DerInteger derX = (DerInteger)keyInfo.PrivateKey;
                return new ElGamalPrivateKeyParameters(derX.Value, new ElGamalParameters(para.P, para.G));
            }
            else if (algID.ObjectID.Equals(X9ObjectIdentifiers.IdDsa))
            {
                DsaParameter para = DsaParameter.GetInstance(algID.Parameters);
                DerInteger derX = (DerInteger) keyInfo.PrivateKey;
                return new DsaPrivateKeyParameters(derX.Value, new DsaParameters(para.P, para.Q, para.G));
            }
            else if (algID.ObjectID.Equals(X9ObjectIdentifiers.IdECPublicKey))
            {
                X962Parameters para = new X962Parameters((Asn1Object)algID.Parameters);
                ECDomainParameters dParams = null;

                if (para.IsNamedCurve)
                {
                    DerObjectIdentifier oid = (DerObjectIdentifier) para.Parameters;
                    X9ECParameters ecP = X962NamedCurves.GetByOid(oid);

                    if (ecP == null)
                    {
                        ecP = SecNamedCurves.GetByOid(oid);

                        if (ecP == null)
                        {
                            ecP = NistNamedCurves.GetByOid(oid);
                        }
                    }

                    dParams = new ECDomainParameters(
                        ecP.Curve,
                        ecP.G,
                        ecP.N,
                        ecP.H,
                        ecP.GetSeed());
                }
                else
                {
                    X9ECParameters ecP = new X9ECParameters(
                        (Asn1Sequence) para.Parameters);
                    dParams = new ECDomainParameters(
                        ecP.Curve,
                        ecP.G,
                        ecP.N,
                        ecP.H,
                        ecP.GetSeed());
                }

                ECPrivateKeyStructure ec = new ECPrivateKeyStructure((Asn1Sequence)keyInfo.PrivateKey);

                return new ECPrivateKeyParameters(ec.GetKey(), dParams);
            }
            else if (algID.ObjectID.Equals(CryptoProObjectIdentifiers.GostR3410x2001))
            {
                throw new NotImplementedException();
            }
            else if (algID.ObjectID.Equals(CryptoProObjectIdentifiers.GostR3410x94))
            {
                Gost3410PublicKeyAlgParameters algParams = new Gost3410PublicKeyAlgParameters(
                    (Asn1Sequence) algID.Parameters);

                DerOctetString derX = (DerOctetString) keyInfo.PrivateKey;
                byte[] keyEnc = derX.GetOctets();
                byte[] keyBytes = new byte[keyEnc.Length];

                for (int i = 0; i != keyEnc.Length; i++)
                {
                    keyBytes[i] = keyEnc[keyEnc.Length - 1 - i]; // was little endian
                }

                BigInteger x = new BigInteger(1, keyBytes);

                return new Gost3410PrivateKeyParameters(x, algParams.PublicKeyParamSet);
            }
            else
            {
                throw new SecurityUtilityException("algorithm identifier in key not recognised");
            }
        }
Exemplo n.º 4
0
		public static AsymmetricKeyParameter CreateKey(
			PrivateKeyInfo keyInfo)
        {
            AlgorithmIdentifier algID = keyInfo.AlgorithmID;
			DerObjectIdentifier algOid = algID.ObjectID;

			// 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 = new RsaPrivateKeyStructure(
					Asn1Sequence.GetInstance(keyInfo.PrivateKey));

				return new RsaPrivateCrtKeyParameters(
					keyStructure.Modulus,
					keyStructure.PublicExponent,
					keyStructure.PrivateExponent,
					keyStructure.Prime1,
					keyStructure.Prime2,
					keyStructure.Exponent1,
					keyStructure.Exponent2,
					keyStructure.Coefficient);
			}
			else if (algOid.Equals(PkcsObjectIdentifiers.DhKeyAgreement))
			{
				DHParameter para = new DHParameter(
					Asn1Sequence.GetInstance(algID.Parameters.ToAsn1Object()));
				DerInteger derX = (DerInteger)keyInfo.PrivateKey;

				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);
			}
			else if (algOid.Equals(OiwObjectIdentifiers.ElGamalAlgorithm))
			{
				ElGamalParameter  para = new ElGamalParameter(
					Asn1Sequence.GetInstance(algID.Parameters.ToAsn1Object()));
				DerInteger derX = (DerInteger)keyInfo.PrivateKey;

				return new ElGamalPrivateKeyParameters(
					derX.Value,
					new ElGamalParameters(para.P, para.G));
			}
			else if (algOid.Equals(X9ObjectIdentifiers.IdDsa))
			{
				DerInteger derX = (DerInteger) keyInfo.PrivateKey;
				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 = new X962Parameters(algID.Parameters.ToAsn1Object());
				X9ECParameters ecP;

				if (para.IsNamedCurve)
				{
					// TODO ECGost3410NamedCurves support (returns ECDomainParameters though)

					DerObjectIdentifier oid = (DerObjectIdentifier) para.Parameters;
					ecP = X962NamedCurves.GetByOid(oid);

					if (ecP == null)
					{
						ecP = SecNamedCurves.GetByOid(oid);

						if (ecP == null)
						{
							ecP = NistNamedCurves.GetByOid(oid);

							if (ecP == null)
							{
								ecP = TeleTrusTNamedCurves.GetByOid(oid);
							}
						}
					}
				}
				else
				{
					ecP = new X9ECParameters((Asn1Sequence) para.Parameters);
				}

				ECDomainParameters dParams = new ECDomainParameters(
					ecP.Curve,
					ecP.G,
					ecP.N,
					ecP.H,
					ecP.GetSeed());

				ECPrivateKeyStructure ec = new ECPrivateKeyStructure(
					Asn1Sequence.GetInstance(keyInfo.PrivateKey));

				return new ECPrivateKeyParameters(ec.GetKey(), dParams);
			}
			else if (algOid.Equals(CryptoProObjectIdentifiers.GostR3410x2001))
			{
				Gost3410PublicKeyAlgParameters gostParams = new Gost3410PublicKeyAlgParameters(
					Asn1Sequence.GetInstance(algID.Parameters.ToAsn1Object()));

				ECPrivateKeyStructure ec = new ECPrivateKeyStructure(
					Asn1Sequence.GetInstance(keyInfo.PrivateKey));

				ECDomainParameters ecP = ECGost3410NamedCurves.GetByOid(gostParams.PublicKeyParamSet);

				if (ecP == null)
					return null;

				return new ECPrivateKeyParameters(ec.GetKey(), gostParams.PublicKeyParamSet);
			}
			else if (algOid.Equals(CryptoProObjectIdentifiers.GostR3410x94))
			{
				Gost3410PublicKeyAlgParameters gostParams = new Gost3410PublicKeyAlgParameters(
					Asn1Sequence.GetInstance(algID.Parameters.ToAsn1Object()));

				DerOctetString derX = (DerOctetString) keyInfo.PrivateKey;
				byte[] keyEnc = derX.GetOctets();
				byte[] keyBytes = new byte[keyEnc.Length];

				for (int i = 0; i != keyEnc.Length; i++)
				{
					keyBytes[i] = keyEnc[keyEnc.Length - 1 - i]; // was little endian
				}

				BigInteger x = new BigInteger(1, keyBytes);

				return new Gost3410PrivateKeyParameters(x, gostParams.PublicKeyParamSet);
			}
			else
			{
				throw new SecurityUtilityException("algorithm identifier in key not recognised");
			}
        }
Exemplo n.º 5
0
        public static PrivateKeyInfo CreatePrivateKeyInfo(
            AsymmetricKeyParameter key)
        {
            if (key == null)
                throw new ArgumentNullException("key");
            if (!key.IsPrivate)
                throw new ArgumentException("Public key passed - private key expected", "key");

            if (key is ElGamalPrivateKeyParameters)
            {
                ElGamalPrivateKeyParameters _key = (ElGamalPrivateKeyParameters)key;
                return new PrivateKeyInfo(
                    new AlgorithmIdentifier(
                    OiwObjectIdentifiers.ElGamalAlgorithm,
                    new ElGamalParameter(
                    _key.Parameters.P,
                    _key.Parameters.G).ToAsn1Object()),
                    new DerInteger(_key.X));
            }

            if (key is DsaPrivateKeyParameters)
            {
                DsaPrivateKeyParameters _key = (DsaPrivateKeyParameters)key;
                return new PrivateKeyInfo(
                    new AlgorithmIdentifier(
                    X9ObjectIdentifiers.IdDsa,
                    new DsaParameter(
                    _key.Parameters.P,
                    _key.Parameters.Q,
                    _key.Parameters.G).ToAsn1Object()),
                    new DerInteger(_key.X));
            }

            if (key is DHPrivateKeyParameters)
            {
                DHPrivateKeyParameters _key = (DHPrivateKeyParameters)key;

                DHParameter p = new DHParameter(
                    _key.Parameters.P, _key.Parameters.G, _key.Parameters.L);

                return new PrivateKeyInfo(
                    new AlgorithmIdentifier(_key.AlgorithmOid, p.ToAsn1Object()),
                    new DerInteger(_key.X));
            }

            if (key is RsaKeyParameters)
            {
                AlgorithmIdentifier algID = new AlgorithmIdentifier(
                    PkcsObjectIdentifiers.RsaEncryption, DerNull.Instance);

                RsaPrivateKeyStructure keyStruct;
                if (key is RsaPrivateCrtKeyParameters)
                {
                    RsaPrivateCrtKeyParameters _key = (RsaPrivateCrtKeyParameters)key;

                    keyStruct = new RsaPrivateKeyStructure(
                        _key.Modulus,
                        _key.PublicExponent,
                        _key.Exponent,
                        _key.P,
                        _key.Q,
                        _key.DP,
                        _key.DQ,
                        _key.QInv);
                }
                else
                {
                    RsaKeyParameters _key = (RsaKeyParameters) key;

                    keyStruct = new RsaPrivateKeyStructure(
                        _key.Modulus,
                        BigInteger.Zero,
                        _key.Exponent,
                        BigInteger.Zero,
                        BigInteger.Zero,
                        BigInteger.Zero,
                        BigInteger.Zero,
                        BigInteger.Zero);
                }

                return new PrivateKeyInfo(algID, keyStruct.ToAsn1Object());
            }

            if (key is ECPrivateKeyParameters)
            {
                ECPrivateKeyParameters _key = (ECPrivateKeyParameters)key;
                AlgorithmIdentifier algID;
                ECPrivateKeyStructure ec;

                if (_key.AlgorithmName == "ECGOST3410")
                {
                    if (_key.PublicKeyParamSet == null)
                        throw Platform.CreateNotImplementedException("Not a CryptoPro parameter set");

                    Gost3410PublicKeyAlgParameters gostParams = new Gost3410PublicKeyAlgParameters(
                        _key.PublicKeyParamSet, CryptoProObjectIdentifiers.GostR3411x94CryptoProParamSet);

                    algID = new AlgorithmIdentifier(
                        CryptoProObjectIdentifiers.GostR3410x2001,
                        gostParams.ToAsn1Object());

                    // TODO Do we need to pass any parameters here?
                    ec = new ECPrivateKeyStructure(_key.D);
                }
                else
                {
                    X962Parameters x962;
                    if (_key.PublicKeyParamSet == null)
                    {
                        ECDomainParameters kp = _key.Parameters;
                        X9ECParameters ecP = new X9ECParameters(kp.Curve, kp.G, kp.N, kp.H, kp.GetSeed());

                        x962 = new X962Parameters(ecP);
                    }
                    else
                    {
                        x962 = new X962Parameters(_key.PublicKeyParamSet);
                    }

                    Asn1Object x962Object = x962.ToAsn1Object();

                    // TODO Possible to pass the publicKey bitstring here?
                    ec = new ECPrivateKeyStructure(_key.D, x962Object);

                    algID = new AlgorithmIdentifier(X9ObjectIdentifiers.IdECPublicKey, x962Object);
                }

                return new PrivateKeyInfo(algID, ec.ToAsn1Object());
            }

            if (key is Gost3410PrivateKeyParameters)
            {
                Gost3410PrivateKeyParameters _key = (Gost3410PrivateKeyParameters)key;

                if (_key.PublicKeyParamSet == null)
                    throw Platform.CreateNotImplementedException("Not a CryptoPro parameter set");

                byte[] keyEnc = _key.X.ToByteArrayUnsigned();
                byte[] keyBytes = new byte[keyEnc.Length];

                for (int i = 0; i != keyBytes.Length; i++)
                {
                    keyBytes[i] = keyEnc[keyEnc.Length - 1 - i]; // must be little endian
                }

                Gost3410PublicKeyAlgParameters algParams = new Gost3410PublicKeyAlgParameters(
                    _key.PublicKeyParamSet, CryptoProObjectIdentifiers.GostR3411x94CryptoProParamSet, null);

                AlgorithmIdentifier algID = new AlgorithmIdentifier(
                    CryptoProObjectIdentifiers.GostR3410x94,
                    algParams.ToAsn1Object());

                return new PrivateKeyInfo(algID, new DerOctetString(keyBytes));
            }

            throw new ArgumentException("Class provided is not convertible: " + key.GetType().FullName);
        }
Exemplo n.º 6
0
        private void EncodePublicKey()
        {
            X9ECParameters ecP = X962NamedCurves.GetByOid(X9ObjectIdentifiers.Prime239v3);

            if (X9IntegerConverter.GetByteLength(ecP.Curve) != 30)
            {
                Fail("wrong byte length reported for curve");
            }

            if (ecP.Curve.FieldSize != 239)
            {
                Fail("wrong field size reported for curve");
            }

            //
            // named curve
            //
            X962Parameters _params = new X962Parameters(X9ObjectIdentifiers.Prime192v1);

            X9ECPoint pPoint = new X9ECPoint(
                new FpPoint(ecP.Curve, new FpFieldElement(BigInteger.Two, BigInteger.One),
                new FpFieldElement(BigInteger.ValueOf(4), BigInteger.ValueOf(3)),
                true));

            Asn1OctetString p = (Asn1OctetString) pPoint.ToAsn1Object();

            if (p == null)
            {
                Fail("failed to convert to ASN.1");
            }

            SubjectPublicKeyInfo info = new SubjectPublicKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.IdECPublicKey, _params), p.GetOctets());

            if (!Arrays.AreEqual(info.GetEncoded(), namedPub))
            {
                Fail("failed public named generation");
            }

            Asn1Object o = Asn1Object.FromByteArray(namedPub);

            if (!info.Equals(o))
            {
                Fail("failed public named equality");
            }

            //
            // explicit curve parameters
            //
            _params = new X962Parameters(ecP);

            info = new SubjectPublicKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.IdECPublicKey, _params), p.GetOctets());

            if (!Arrays.AreEqual(info.GetEncoded(), expPub))
            {
                Fail("failed public explicit generation");
            }

            o = Asn1Object.FromByteArray(expPub);

            if (!info.Equals(o))
            {
                Fail("failed public explicit equality");
            }
        }
Exemplo n.º 7
0
		public static AsymmetricKeyParameter CreateKey(
			SubjectPublicKeyInfo keyInfo)
        {
            AlgorithmIdentifier algID = keyInfo.AlgorithmID;
			DerObjectIdentifier algOid = algID.ObjectID;

			// TODO See RSAUtil.isRsaOid in Java build
			if (algOid.Equals(PkcsObjectIdentifiers.RsaEncryption)
				|| algOid.Equals(X509ObjectIdentifiers.IdEARsa)
				|| algOid.Equals(PkcsObjectIdentifiers.IdRsassaPss)
				|| algOid.Equals(PkcsObjectIdentifiers.IdRsaesOaep))
			{
				RsaPublicKeyStructure pubKey = RsaPublicKeyStructure.GetInstance(
					keyInfo.GetPublicKey());

				return new RsaKeyParameters(false, pubKey.Modulus, pubKey.PublicExponent);
			}
			else if (algOid.Equals(PkcsObjectIdentifiers.DhKeyAgreement)
				|| algOid.Equals(X9ObjectIdentifiers.DHPublicNumber))
			{
				DHParameter para = new DHParameter(
					Asn1Sequence.GetInstance(algID.Parameters.ToAsn1Object()));
				DerInteger derY = (DerInteger) keyInfo.GetPublicKey();

				BigInteger lVal = para.L;
				int l = lVal == null ? 0 : lVal.IntValue;
				DHParameters dhParams = new DHParameters(para.P, para.G, null, l);

				return new DHPublicKeyParameters(derY.Value, dhParams);
			}
			else if (algOid.Equals(OiwObjectIdentifiers.ElGamalAlgorithm))
			{
				ElGamalParameter para = new ElGamalParameter(
					Asn1Sequence.GetInstance(algID.Parameters.ToAsn1Object()));
				DerInteger derY = (DerInteger) keyInfo.GetPublicKey();

				return new ElGamalPublicKeyParameters(
					derY.Value,
					new ElGamalParameters(para.P, para.G));
			}
			else if (algOid.Equals(X9ObjectIdentifiers.IdDsa)
				|| algOid.Equals(OiwObjectIdentifiers.DsaWithSha1))
			{
				DerInteger derY = (DerInteger) keyInfo.GetPublicKey();
				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 DsaPublicKeyParameters(derY.Value, parameters);
			}
			else if (algOid.Equals(X9ObjectIdentifiers.IdECPublicKey))
			{
				X962Parameters para = new X962Parameters(
					algID.Parameters.ToAsn1Object());
				X9ECParameters ecP;

				if (para.IsNamedCurve)
				{
					// TODO ECGost3410NamedCurves support (returns ECDomainParameters though)

					DerObjectIdentifier oid = (DerObjectIdentifier)para.Parameters;
					ecP = X962NamedCurves.GetByOid(oid);

					if (ecP == null)
					{
						ecP = SecNamedCurves.GetByOid(oid);

						if (ecP == null)
						{
							ecP = NistNamedCurves.GetByOid(oid);

							if (ecP == null)
							{
								ecP = TeleTrusTNamedCurves.GetByOid(oid);
							}
						}
					}
				}
				else
				{
					ecP = new X9ECParameters((Asn1Sequence)para.Parameters);
				}

				ECDomainParameters dParams = new ECDomainParameters(
					ecP.Curve,
					ecP.G,
					ecP.N,
					ecP.H,
					ecP.GetSeed());

				DerBitString bits = keyInfo.PublicKeyData;
				byte[] data = bits.GetBytes();
				Asn1OctetString key = new DerOctetString(data);

				X9ECPoint derQ = new X9ECPoint(dParams.Curve, key);

				return new ECPublicKeyParameters(derQ.Point, dParams);
			}
			else if (algOid.Equals(CryptoProObjectIdentifiers.GostR3410x2001))
			{
				Gost3410PublicKeyAlgParameters gostParams = new Gost3410PublicKeyAlgParameters(
					(Asn1Sequence) algID.Parameters);

				Asn1OctetString key;
				try
				{
					key = (Asn1OctetString) keyInfo.GetPublicKey();
				}
				catch (IOException)
				{
					throw new ArgumentException("invalid info structure in GOST3410 public key");
				}

				byte[] keyEnc = key.GetOctets();
				byte[] x = new byte[32];
				byte[] y = new byte[32];

				for (int i = 0; i != y.Length; i++)
				{
					x[i] = keyEnc[32 - 1 - i];
				}

				for (int i = 0; i != x.Length; i++)
				{
					y[i] = keyEnc[64 - 1 - i];
				}

				ECDomainParameters ecP = ECGost3410NamedCurves.GetByOid(gostParams.PublicKeyParamSet);

				if (ecP == null)
					return null;

				ECPoint q = ecP.Curve.CreatePoint(new BigInteger(1, x), new BigInteger(1, y), false);

				return new ECPublicKeyParameters(q, gostParams.PublicKeyParamSet);
			}
			else if (algOid.Equals(CryptoProObjectIdentifiers.GostR3410x94))
			{
				Gost3410PublicKeyAlgParameters algParams = new Gost3410PublicKeyAlgParameters(
					(Asn1Sequence) algID.Parameters);

				DerOctetString derY;
				try
				{
					derY = (DerOctetString) keyInfo.GetPublicKey();
				}
				catch (IOException)
				{
					throw new ArgumentException("invalid info structure in GOST3410 public key");
				}

				byte[] keyEnc = derY.GetOctets();
				byte[] keyBytes = new byte[keyEnc.Length];

				for (int i = 0; i != keyEnc.Length; i++)
				{
					keyBytes[i] = keyEnc[keyEnc.Length - 1 - i]; // was little endian
				}

				BigInteger y = new BigInteger(1, keyBytes);

				return new Gost3410PublicKeyParameters(y, algParams.PublicKeyParamSet);
			}
            else
            {
                throw new SecurityUtilityException("algorithm identifier in key not recognised: " + algOid);
            }
        }
Exemplo n.º 8
0
        public static AsymmetricKeyParameter CreateKey(
            SubjectPublicKeyInfo keyInfo)
        {
            AlgorithmIdentifier algID = keyInfo.AlgorithmID;
            DerObjectIdentifier algOid = algID.ObjectID;

            // TODO See RSAUtil.isRsaOid in Java build
            if (algOid.Equals(PkcsObjectIdentifiers.RsaEncryption)
                || algOid.Equals(X509ObjectIdentifiers.IdEARsa)
                || algOid.Equals(PkcsObjectIdentifiers.IdRsassaPss)
                || algOid.Equals(PkcsObjectIdentifiers.IdRsaesOaep))
            {
                RsaPublicKeyStructure pubKey = RsaPublicKeyStructure.GetInstance(
                    keyInfo.GetPublicKey());

                return new RsaKeyParameters(false, pubKey.Modulus, pubKey.PublicExponent);
            }
            else if (algOid.Equals(X9ObjectIdentifiers.DHPublicNumber))
            {
                Asn1Sequence seq = Asn1Sequence.GetInstance(algID.Parameters.ToAsn1Object());

                DHPublicKey dhPublicKey = DHPublicKey.GetInstance(keyInfo.GetPublicKey());

                BigInteger y = dhPublicKey.Y.Value;

                if (IsPkcsDHParam(seq))
                    return ReadPkcsDHParam(algOid, y, seq);

                DHDomainParameters dhParams = DHDomainParameters.GetInstance(seq);

                BigInteger p = dhParams.P.Value;
                BigInteger g = dhParams.G.Value;
                BigInteger q = dhParams.Q.Value;

                BigInteger j = null;
                if (dhParams.J != null)
                {
                    j = dhParams.J.Value;
                }

                DHValidationParameters validation = null;
                DHValidationParms dhValidationParms = dhParams.ValidationParms;
                if (dhValidationParms != null)
                {
                    byte[] seed = dhValidationParms.Seed.GetBytes();
                    BigInteger pgenCounter = dhValidationParms.PgenCounter.Value;

                    // TODO Check pgenCounter size?

                    validation = new DHValidationParameters(seed, pgenCounter.IntValue);
                }

                return new DHPublicKeyParameters(y, new DHParameters(p, g, q, j, validation));
            }
            else if (algOid.Equals(PkcsObjectIdentifiers.DhKeyAgreement))
            {
                Asn1Sequence seq = Asn1Sequence.GetInstance(algID.Parameters.ToAsn1Object());

                DerInteger derY = (DerInteger) keyInfo.GetPublicKey();

                return ReadPkcsDHParam(algOid, derY.Value, seq);
            }
            else if (algOid.Equals(OiwObjectIdentifiers.ElGamalAlgorithm))
            {
                ElGamalParameter para = new ElGamalParameter(
                    Asn1Sequence.GetInstance(algID.Parameters.ToAsn1Object()));
                DerInteger derY = (DerInteger) keyInfo.GetPublicKey();

                return new ElGamalPublicKeyParameters(
                    derY.Value,
                    new ElGamalParameters(para.P, para.G));
            }
            else if (algOid.Equals(X9ObjectIdentifiers.IdDsa)
                || algOid.Equals(OiwObjectIdentifiers.DsaWithSha1))
            {
                DerInteger derY = (DerInteger) keyInfo.GetPublicKey();
                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 DsaPublicKeyParameters(derY.Value, parameters);
            }
            else if (algOid.Equals(X9ObjectIdentifiers.IdECPublicKey))
            {
                X962Parameters para = new X962Parameters(algID.Parameters.ToAsn1Object());

                X9ECParameters x9;
                if (para.IsNamedCurve)
                {
                    x9 = ECKeyPairGenerator.FindECCurveByOid((DerObjectIdentifier)para.Parameters);
                }
                else
                {
                    x9 = new X9ECParameters((Asn1Sequence)para.Parameters);
                }

                Asn1OctetString key = new DerOctetString(keyInfo.PublicKeyData.GetBytes());
                X9ECPoint derQ = new X9ECPoint(x9.Curve, key);
                ECPoint q = derQ.Point;

                if (para.IsNamedCurve)
                {
                    return new ECPublicKeyParameters("EC", q, (DerObjectIdentifier)para.Parameters);
                }

                ECDomainParameters dParams = new ECDomainParameters(x9.Curve, x9.G, x9.N, x9.H, x9.GetSeed());
                return new ECPublicKeyParameters(q, dParams);
            }
            else if (algOid.Equals(CryptoProObjectIdentifiers.GostR3410x2001))
            {
                Gost3410PublicKeyAlgParameters gostParams = new Gost3410PublicKeyAlgParameters(
                    (Asn1Sequence) algID.Parameters);

                Asn1OctetString key;
                try
                {
                    key = (Asn1OctetString) keyInfo.GetPublicKey();
                }
                catch (IOException)
                {
                    throw new ArgumentException("invalid info structure in GOST3410 public key");
                }

                byte[] keyEnc = key.GetOctets();
                byte[] x = new byte[32];
                byte[] y = new byte[32];

                for (int i = 0; i != y.Length; i++)
                {
                    x[i] = keyEnc[32 - 1 - i];
                }

                for (int i = 0; i != x.Length; i++)
                {
                    y[i] = keyEnc[64 - 1 - i];
                }

                ECDomainParameters ecP = ECGost3410NamedCurves.GetByOid(gostParams.PublicKeyParamSet);

                if (ecP == null)
                    return null;

                ECPoint q = ecP.Curve.CreatePoint(new BigInteger(1, x), new BigInteger(1, y));

                return new ECPublicKeyParameters("ECGOST3410", q, gostParams.PublicKeyParamSet);
            }
            else if (algOid.Equals(CryptoProObjectIdentifiers.GostR3410x94))
            {
                Gost3410PublicKeyAlgParameters algParams = new Gost3410PublicKeyAlgParameters(
                    (Asn1Sequence) algID.Parameters);

                DerOctetString derY;
                try
                {
                    derY = (DerOctetString) keyInfo.GetPublicKey();
                }
                catch (IOException)
                {
                    throw new ArgumentException("invalid info structure in GOST3410 public key");
                }

                byte[] keyEnc = derY.GetOctets();
                byte[] keyBytes = new byte[keyEnc.Length];

                for (int i = 0; i != keyEnc.Length; i++)
                {
                    keyBytes[i] = keyEnc[keyEnc.Length - 1 - i]; // was little endian
                }

                BigInteger y = new BigInteger(1, keyBytes);

                return new Gost3410PublicKeyParameters(y, algParams.PublicKeyParamSet);
            }
            else
            {
                throw new SecurityUtilityException("algorithm identifier in key not recognised: " + algOid);
            }
        }
Exemplo n.º 9
0
        public static PrivateKeyInfo CreatePrivateKeyInfo(
			AsymmetricKeyParameter key)
        {
            if (key == null)
                throw new ArgumentNullException("key");
            if (!key.IsPrivate)
                throw new ArgumentException("Public key passed - private key expected", "key");

            if (key is ElGamalPrivateKeyParameters)
            {
                ElGamalPrivateKeyParameters _key = (ElGamalPrivateKeyParameters)key;
                PrivateKeyInfo info = new PrivateKeyInfo(
                    new AlgorithmIdentifier(
                        OiwObjectIdentifiers.ElGamalAlgorithm,
                        new ElGamalParameter(
                            _key.Parameters.P,
                            _key.Parameters.G).ToAsn1Object()),
                    new DerInteger(_key.X));

                return info;
            }

            if (key is DsaPrivateKeyParameters)
            {
                DsaPrivateKeyParameters _key = (DsaPrivateKeyParameters)key;
                PrivateKeyInfo info = new PrivateKeyInfo(
                    new AlgorithmIdentifier(
                        X9ObjectIdentifiers.IdDsa,
                        new DsaParameter(
                            _key.Parameters.P,
                            _key.Parameters.Q,
                            _key.Parameters.G).ToAsn1Object()),
                    new DerInteger(_key.X));

                return info;
            }

            if (key is DHPrivateKeyParameters)
            {
                /*
                    Process DH private key.
                    The value for L was set to zero implicitly.
                    This is the same action as found in JCEDHPrivateKey GetEncoded method.
                */

                DHPrivateKeyParameters _key = (DHPrivateKeyParameters)key;

                DHParameter withNewL = new DHParameter(
                    _key.Parameters.P, _key.Parameters.G, 0);

                PrivateKeyInfo info = new PrivateKeyInfo(
                    new AlgorithmIdentifier(
                        PkcsObjectIdentifiers.DhKeyAgreement,
                        withNewL.ToAsn1Object()),
                    new DerInteger(_key.X));

                return info;
            }

            if (key is RsaKeyParameters)
            {
                if (key is RsaPrivateCrtKeyParameters)
                {
                    RsaPrivateCrtKeyParameters _key = (RsaPrivateCrtKeyParameters)key;
                    PrivateKeyInfo info = new PrivateKeyInfo(
                        new AlgorithmIdentifier(
                            PkcsObjectIdentifiers.RsaEncryption,
                            DerNull.Instance),
                        new RsaPrivateKeyStructure(
                            _key.Modulus,
                            _key.PublicExponent,
                            _key.Exponent,
                            _key.P,
                            _key.Q,
                            _key.DP,
                            _key.DQ,
                            _key.QInv).ToAsn1Object());

                    return info;
                }

                // TODO Check that we are not supposed to be able to encode these
            //				RsaKeyParameters rkp = (RsaKeyParameters) key;
            }

            if (key is ECPrivateKeyParameters)
            {
                ECPrivateKeyParameters _key = (ECPrivateKeyParameters)key;

                if (_key.AlgorithmName == "ECGOST3410")
                {
                    throw new NotImplementedException();
                }
                else
                {
                    X9ECParameters ecP = new X9ECParameters(
                        _key.Parameters.Curve,
                        _key.Parameters.G,
                        _key.Parameters.N,
                        _key.Parameters.H,
                        _key.Parameters.GetSeed());

                    X962Parameters x962 = new X962Parameters(ecP);

                    PrivateKeyInfo info = new PrivateKeyInfo(
                        new AlgorithmIdentifier(X9ObjectIdentifiers.IdECPublicKey, x962.ToAsn1Object()),
                        new ECPrivateKeyStructure(_key.D).ToAsn1Object());

                    return info;
                }
            }

            if (key is Gost3410PrivateKeyParameters)
            {
                Gost3410PrivateKeyParameters _key = (Gost3410PrivateKeyParameters)key;

                if (_key.PublicKeyParamSet == null)
                    throw new NotImplementedException("Encoding only implemented for CryptoPro parameter sets");

                // TODO Once it is efficiently implemented, use ToByteArrayUnsigned
                byte[] keyEnc = _key.X.ToByteArray();
                byte[] keyBytes;

                if (keyEnc[0] == 0)
                {
                    keyBytes = new byte[keyEnc.Length - 1];
                }
                else
                {
                    keyBytes = new byte[keyEnc.Length];
                }

                for (int i = 0; i != keyBytes.Length; i++)
                {
                    keyBytes[i] = keyEnc[keyEnc.Length - 1 - i]; // must be little endian
                }

                Gost3410PublicKeyAlgParameters algParams = new Gost3410PublicKeyAlgParameters(
                    _key.PublicKeyParamSet, CryptoProObjectIdentifiers.GostR3411x94CryptoProParamSet, null);

                AlgorithmIdentifier algID = new AlgorithmIdentifier(
                    CryptoProObjectIdentifiers.GostR3410x94,
                    algParams.ToAsn1Object());

                return new PrivateKeyInfo(algID, new DerOctetString(keyBytes));
            }

            throw new ArgumentException("Class provided is not convertible: " + key.GetType().FullName);
        }
        public static AsymmetricKeyParameter CreateKey(
            PrivateKeyInfo keyInfo)
        {
            AlgorithmIdentifier algID = keyInfo.PrivateKeyAlgorithm;
            DerObjectIdentifier algOid = algID.ObjectID;

            // 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 = new X962Parameters(algID.Parameters.ToAsn1Object());

                X9ECParameters x9;
                if (para.IsNamedCurve)
                {
                    x9 = ECKeyPairGenerator.FindECCurveByOid((DerObjectIdentifier)para.Parameters);
                }
                else
                {
                    x9 = new X9ECParameters((Asn1Sequence)para.Parameters);
                }

                ECPrivateKeyStructure ec = new ECPrivateKeyStructure(
                    Asn1Sequence.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 = new Gost3410PublicKeyAlgParameters(
                    Asn1Sequence.GetInstance(algID.Parameters.ToAsn1Object()));

                Asn1Object privKey = keyInfo.ParsePrivateKey();
                ECPrivateKeyStructure ec;

                if (privKey is DerInteger)
                {
                    // TODO Do we need to pass any parameters here?
                    ec = new ECPrivateKeyStructure(((DerInteger)privKey).Value);
                }
                else
                {
                    ec = ECPrivateKeyStructure.GetInstance(privKey);
                }

                ECDomainParameters ecP = ECGost3410NamedCurves.GetByOid(gostParams.PublicKeyParamSet);

                if (ecP == null)
                    throw new ArgumentException("Unrecognized curve OID for GostR3410x2001 private key");

                return new ECPrivateKeyParameters("ECGOST3410", ec.GetKey(), gostParams.PublicKeyParamSet);
            }
            else if (algOid.Equals(CryptoProObjectIdentifiers.GostR3410x94))
            {
                Gost3410PublicKeyAlgParameters gostParams = new Gost3410PublicKeyAlgParameters(
                    Asn1Sequence.GetInstance(algID.Parameters.ToAsn1Object()));

                DerOctetString derX = (DerOctetString)keyInfo.ParsePrivateKey();
                BigInteger x = new BigInteger(1, Arrays.Reverse(derX.GetOctets()));

                return new Gost3410PrivateKeyParameters(x, gostParams.PublicKeyParamSet);
            }
            else
            {
                throw new SecurityUtilityException("algorithm identifier in key not recognised");
            }
        }
Exemplo n.º 11
0
        public static AsymmetricKeyParameter CreateKey(
			SubjectPublicKeyInfo keyInfo)
        {
            AlgorithmIdentifier algID = keyInfo.AlgorithmID;

            if (algID.ObjectID.Equals(PkcsObjectIdentifiers.RsaEncryption)
                || algID.ObjectID.Equals(X509ObjectIdentifiers.IdEARsa))
            {
                RsaPublicKeyStructure pubKey = RsaPublicKeyStructure.GetInstance(keyInfo.GetPublicKey());

                return new RsaKeyParameters(false, pubKey.Modulus, pubKey.PublicExponent);
            }
            else if (algID.ObjectID.Equals(PkcsObjectIdentifiers.DhKeyAgreement)
                || algID.ObjectID.Equals(X9ObjectIdentifiers.DHPublicNumber))
            {
                DHParameter para = new DHParameter((Asn1Sequence)keyInfo.AlgorithmID.Parameters);
                DerInteger derY = (DerInteger)keyInfo.GetPublicKey();

                return new DHPublicKeyParameters(derY.Value, new DHParameters(para.P, para.G));
            }
            else if (algID.ObjectID.Equals(OiwObjectIdentifiers.ElGamalAlgorithm))
            {
                ElGamalParameter para = new ElGamalParameter((Asn1Sequence)keyInfo.AlgorithmID.Parameters);
                DerInteger derY = (DerInteger)keyInfo.GetPublicKey();

                return new ElGamalPublicKeyParameters(derY.Value, new ElGamalParameters(para.P, para.G));
            }
            else if (algID.ObjectID.Equals(X9ObjectIdentifiers.IdDsa)
                || algID.ObjectID.Equals(OiwObjectIdentifiers.DsaWithSha1))
            {
                DsaParameter para = DsaParameter.GetInstance(keyInfo.AlgorithmID.Parameters);
                DerInteger derY = (DerInteger)keyInfo.GetPublicKey();

                return new DsaPublicKeyParameters(derY.Value, new DsaParameters(para.P, para.Q, para.G));
            }
            else if (algID.ObjectID.Equals(X9ObjectIdentifiers.IdECPublicKey))
            {
                X962Parameters para = new X962Parameters((Asn1Object)keyInfo.AlgorithmID.Parameters);
                ECDomainParameters dParams = null;

                if (para.IsNamedCurve)
                {
                    DerObjectIdentifier oid = (DerObjectIdentifier)para.Parameters;
                    X9ECParameters ecP = X962NamedCurves.GetByOid(oid);

                    if (ecP == null)
                    {
                        ecP = SecNamedCurves.GetByOid(oid);

                        if (ecP == null)
                        {
                            ecP = NistNamedCurves.GetByOid(oid);
                        }
                    }

                    dParams = new ECDomainParameters(
                        ecP.Curve,
                        ecP.G,
                        ecP.N,
                        ecP.H,
                        ecP.GetSeed());
                }
                else
                {
                    X9ECParameters ecP = new X9ECParameters((Asn1Sequence)para.Parameters.ToAsn1Object());

                    dParams = new ECDomainParameters(
                        ecP.Curve,
                        ecP.G,
                        ecP.N,
                        ecP.H,
                        ecP.GetSeed());
                }

                DerBitString bits = keyInfo.PublicKeyData;
                byte[] data = bits.GetBytes();
                Asn1OctetString key = new DerOctetString(data);

                X9ECPoint derQ = new X9ECPoint(dParams.Curve, key);

                return new ECPublicKeyParameters(derQ.Point, dParams);
            }
            else if (algID.ObjectID.Equals(CryptoProObjectIdentifiers.GostR3410x2001))
            {
                Gost3410PublicKeyAlgParameters gostParams = new Gost3410PublicKeyAlgParameters(
                    (Asn1Sequence) algID.Parameters);

                Asn1OctetString key;
                try
                {
                    key = (Asn1OctetString) keyInfo.GetPublicKey();
                }
                catch (IOException)
                {
                    throw new ArgumentException("invalid info structure in GOST3410 public key");
                }

                byte[] keyEnc = key.GetOctets();
                byte[] x = new byte[32];
                byte[] y = new byte[32];

                for (int i = 0; i != y.Length; i++)
                {
                    x[i] = keyEnc[32 - 1 - i];
                }

                for (int i = 0; i != x.Length; i++)
                {
                    y[i] = keyEnc[64 - 1 - i];
                }

                ECDomainParameters ecP = ECGost3410NamedCurves.GetByOid(gostParams.PublicKeyParamSet);

                if (ecP == null)
                    return null;

                ECCurve curve = ecP.Curve;
                ECPoint q;

                if (curve is FpCurve)
                {
                    FpCurve curveFp = (FpCurve) curve;
                    q = new FpPoint(
                        curveFp,
                        new FpFieldElement(curveFp.Q, new BigInteger(1, x)),
                        new FpFieldElement(curveFp.Q, new BigInteger(1, y)));
                }
                else
                {
                    F2mCurve curveF2m = (F2mCurve) curve;
                    q = new F2mPoint(
                        curveF2m,
                        new F2mFieldElement(curveF2m.M, curveF2m.K1, curveF2m.K2, curveF2m.K3, new BigInteger(1, x)),
                        new F2mFieldElement(curveF2m.M, curveF2m.K1, curveF2m.K2, curveF2m.K3, new BigInteger(1, y)),
                        false);
                }

                return new ECPublicKeyParameters(q, gostParams.PublicKeyParamSet);
            }
            else if (algID.ObjectID.Equals(CryptoProObjectIdentifiers.GostR3410x94))
            {
                Gost3410PublicKeyAlgParameters algParams = new Gost3410PublicKeyAlgParameters(
                    (Asn1Sequence) algID.Parameters);

                DerOctetString derY;
                try
                {
                    derY = (DerOctetString) keyInfo.GetPublicKey();
                }
                catch (IOException)
                {
                    throw new ArgumentException("invalid info structure in GOST3410 public key");
                }

                byte[] keyEnc = derY.GetOctets();
                byte[] keyBytes = new byte[keyEnc.Length];

                for (int i = 0; i != keyEnc.Length; i++)
                {
                    keyBytes[i] = keyEnc[keyEnc.Length - 1 - i]; // was little endian
                }

                BigInteger y = new BigInteger(1, keyBytes);

                return new Gost3410PublicKeyParameters(y, algParams.PublicKeyParamSet);
            }
            else
            {
                throw new SecurityUtilityException("algorithm identifier in key not recognised: " + algID.ObjectID);
            }
        }
Exemplo n.º 12
0
        private void EncodePrivateKey()
        {
            X9ECParameters ecP = X962NamedCurves.GetByOid(X9ObjectIdentifiers.Prime192v1);

            //
            // named curve
            //
            X962Parameters _params = new X962Parameters(X9ObjectIdentifiers.Prime192v1);

            PrivateKeyInfo info = new PrivateKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.IdECPublicKey, _params),
                new ECPrivateKeyStructure(ecP.N.BitLength, BigInteger.Ten).ToAsn1Object());

            if (!Arrays.AreEqual(info.GetEncoded(), namedPriv))
            {
                Fail("failed private named generation");
            }

            Asn1Object o = Asn1Object.FromByteArray(namedPriv);

            if (!info.Equals(o))
            {
                Fail("failed private named equality");
            }

            //
            // explicit curve parameters
            //
            ecP = X962NamedCurves.GetByOid(X9ObjectIdentifiers.Prime239v3);

            _params = new X962Parameters(ecP);

            info = new PrivateKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.IdECPublicKey, _params),
                new ECPrivateKeyStructure(ecP.N.BitLength, BigInteger.ValueOf(20)).ToAsn1Object());

            if (!Arrays.AreEqual(info.GetEncoded(), expPriv))
            {
                Fail("failed private explicit generation");
            }

            o = Asn1Object.FromByteArray(expPriv);

            if (!info.Equals(o))
            {
                Fail("failed private explicit equality");
            }
        }
Exemplo n.º 13
0
        private void EncodePublicKey()
        {
            X9ECParameters ecP = X962NamedCurves.GetByOid(X9ObjectIdentifiers.Prime239v3);

            if (X9IntegerConverter.GetByteLength(ecP.Curve) != 30)
            {
                Fail("wrong byte length reported for curve");
            }

            if (ecP.Curve.FieldSize != 239)
            {
                Fail("wrong field size reported for curve");
            }

            //
            // named curve
            //
            X962Parameters _params = new X962Parameters(X9ObjectIdentifiers.Prime192v1);
            ECPoint point = ecP.G.Multiply(BigInteger.ValueOf(100));

            DerOctetString p = new DerOctetString(point.GetEncoded(true));

            SubjectPublicKeyInfo info = new SubjectPublicKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.IdECPublicKey, _params), p.GetOctets());
            if (!Arrays.AreEqual(info.GetEncoded(), namedPub))
            {
                Fail("failed public named generation");
            }

            X9ECPoint x9P = new X9ECPoint(ecP.Curve, p);

            if (!Arrays.AreEqual(p.GetOctets(), x9P.Point.GetEncoded()))
            {
                Fail("point encoding not preserved");
            }

            Asn1Object o = Asn1Object.FromByteArray(namedPub);

            if (!info.Equals(o))
            {
                Fail("failed public named equality");
            }

            //
            // explicit curve parameters
            //
            _params = new X962Parameters(ecP);

            info = new SubjectPublicKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.IdECPublicKey, _params), p.GetOctets());

            if (!Arrays.AreEqual(info.GetEncoded(), expPub))
            {
                Fail("failed public explicit generation");
            }

            o = Asn1Object.FromByteArray(expPub);

            if (!info.Equals(o))
            {
                Fail("failed public explicit equality");
            }
        }