GetDigestSize() public method

public GetDigestSize ( ) : int
return int
Example #1
0
 public BigInteger GetDigest(byte[] message)
 {
     Gost3411Digest gost3411Digest = new Gost3411Digest();
     gost3411Digest.BlockUpdate(message, 0, message.Length);
     byte[] hashmessage = new byte[gost3411Digest.GetDigestSize()];
     gost3411Digest.DoFinal(hashmessage, 0);
     return new BigInteger(hashmessage);
 }
Example #2
0
        public bool verifyPassword(string Password)
        {
            this.Password = Password;

            byte[] password = Utility.StringToByteArray(this.Password);
            Gost3411Digest digest = new Gost3411Digest();
            SecureRandom random = new SecureRandom();
            byte[] salt = random.GenerateSeed(16);
            digest.BlockUpdate(password, 0, password.Length);
            digest.BlockUpdate(salt, 0, 16);
            byte[] hash = new byte[digest.GetDigestSize()];
            digest.DoFinal(hash, 0);

            return true;
        }
Example #3
0
        public LavaResult AddNewUser(LavaUser user)
        {
            LavaResult result = new LavaResult();

            SqlConnection conn = new SqlConnection(connectionString);

            SqlCommand cmdNewCustomer = new SqlCommand("Volcano.uspNewUser", conn);
            cmdNewCustomer.CommandType = CommandType.StoredProcedure;

            cmdNewCustomer.Parameters.Add(new SqlParameter("@UserName", SqlDbType.NChar, 32));
            cmdNewCustomer.Parameters["@UserName"].Value = user.UserName;

            byte[] password = Utility.StringToByteArray(user.Password);
            Gost3411Digest digest = new Gost3411Digest();
            SecureRandom random = new SecureRandom();
            byte[] salt = random.GenerateSeed(16);
            digest.BlockUpdate(password, 0, password.Length);
            digest.BlockUpdate(salt, 0, 16);
            byte[] hash = new byte[digest.GetDigestSize()];
            digest.DoFinal(hash, 0);

            cmdNewCustomer.Parameters.AddWithValue("@Password", hash);
            cmdNewCustomer.Parameters.AddWithValue("@Salt", salt);

            cmdNewCustomer.Parameters.Add(new SqlParameter("@UserID", SqlDbType.Int));
            cmdNewCustomer.Parameters["@UserID"].Direction = ParameterDirection.Output;

            try
            {
                conn.Open();
                cmdNewCustomer.ExecuteNonQuery();
                user.UserID = (int)cmdNewCustomer.Parameters["@UserID"].Value;
            }
            catch (SqlException sqlEx)
            {
                if (sqlEx.Errors.Count > 0) // Assume the interesting stuff is in the first error
                {
                    switch (sqlEx.Errors[0].Number)
                    {
                        case 2627: // Foreign Key violation
                            result.Result = LAVA_ERROR_CODE.USER_ALREADY_EXIST;
                            result.Message = "UserName already exist. " + sqlEx.Message;
                            break;
                        default:
                            result.Result = LAVA_ERROR_CODE.UNKNOWH_ERROR;
                            result.Message = "Customer ID was not returned. Account could not be created. " + sqlEx.Errors[0].Number + sqlEx.Message;
                            break;
                    }
                }
            }
            catch (Exception ex)
            {
                result.Result = LAVA_ERROR_CODE.UNKNOWH_ERROR;
                result.Message = "Customer ID was not returned. Account could not be created. " + ex.Message;
            }
            finally
            {
                conn.Close();
            }

            return result;
        }
Example #4
0
        /**
         * Test Sign and Verify with test parameters
         * see: http://www.ietf.org/internet-drafts/draft-popov-cryptopro-cpalgs-01.txt
         * gostR3410-2001-TestParamSet  P.46
         */
        private void ecGOST3410_TestParam()
        {
            SecureRandom    random = new SecureRandom();

            BigInteger mod_p = new BigInteger("57896044618658097711785492504343953926634992332820282019728792003956564821041"); //p

            FpCurve curve = new FpCurve(
                mod_p, // p
                new BigInteger("7"), // a
                new BigInteger("43308876546767276905765904595650931995942111794451039583252968842033849580414")); // b

            ECDomainParameters parameters = new ECDomainParameters(
                                   curve,
                                   new FpPoint(curve,
                                   new FpFieldElement(mod_p,new BigInteger("2")), // x
                                   new FpFieldElement(mod_p,new BigInteger("4018974056539037503335449422937059775635739389905545080690979365213431566280"))), // y
                                   new BigInteger("57896044618658097711785492504343953927082934583725450622380973592137631069619")); // q

            ECKeyPairGenerator          pGen = new ECKeyPairGenerator();
            ECKeyGenerationParameters   genParam = new ECKeyGenerationParameters(
                parameters,
                random);

            pGen.Init(genParam);

            AsymmetricCipherKeyPair  pair = pGen.GenerateKeyPair();

            ParametersWithRandom param = new ParametersWithRandom(pair.Private, random);

            ECGost3410Signer ecgost3410 = new ECGost3410Signer();

            ecgost3410.Init(true, param);

            //get hash message using the digest GOST3411.
            byte[] message = Encoding.ASCII.GetBytes("Message for sign");
            Gost3411Digest gost3411 = new Gost3411Digest();
            gost3411.BlockUpdate(message, 0, message.Length);
            byte[] hashmessage = new byte[gost3411.GetDigestSize()];
            gost3411.DoFinal(hashmessage, 0);

            BigInteger[] sig = ecgost3410.GenerateSignature(hashmessage);

            ecgost3410.Init(false, pair.Public);

            if (!ecgost3410.VerifySignature(hashmessage, sig[0], sig[1]))
            {
                Fail("signature fails");
            }
        }
		private bool VerifyGost(byte[] buffer, int length, byte[] signature)
		{
			ECDomainParameters dParams = ECGost3410NamedCurves.GetByOid(CryptoProObjectIdentifiers.GostR3410x2001CryptoProA);
			byte[] reversedPublicKey = PublicKey.Reverse().ToArray();
			ECPoint q = dParams.Curve.CreatePoint(new BigInteger(1, reversedPublicKey, 32, 32), new BigInteger(1, reversedPublicKey, 0, 32), false);
			ECPublicKeyParameters parameters = new ECPublicKeyParameters(q, dParams);

			var signer = new ECGost3410Signer();
			signer.Init(false, parameters);

			var digest = new Gost3411Digest();

			digest.BlockUpdate(buffer, 0, length);
			byte[] hash = new byte[digest.GetDigestSize()];
			digest.DoFinal(hash, 0);

			return signer.VerifySignature(hash, new BigInteger(1, signature, 32, 32), new BigInteger(1, signature, 0, 32));
		}
		private byte[] SignGost(byte[] buffer, int length)
		{
			ECGost3410Signer signer = new ECGost3410Signer();
			signer.Init(true, new ParametersWithRandom(PrivateKeyFactory.CreateKey(PrivateKey), _secureRandom));

			var digest = new Gost3411Digest();

			digest.BlockUpdate(buffer, 0, length);
			byte[] hash = new byte[digest.GetDigestSize()];
			digest.DoFinal(hash, 0);

			var signature = signer.GenerateSignature(hash);

			byte[] res = new byte[64];

			signature[0].ToByteArrayUnsigned().CopyTo(res, 32);
			signature[1].ToByteArrayUnsigned().CopyTo(res, 0);

			return res;
		}