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);
}
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;
}
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;
}
/**
* 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;
}