public static byte[] GetStringHash(string val, byte[] salt, int length)
{
byte[] secretKey = SecretKeyStorage.Instance.SecretKey;
HMACSHA512 hmac512 = new HMACSHA512(secretKey);
//
// Add the data
//
MemoryStream ms = new MemoryStream();
BinaryWriter bw = new BinaryWriter(ms);
bw.Write(val);
bw.Close();
hmac512.TransformBlock(salt, 0, salt.Length, salt, 0);
hmac512.TransformFinalBlock(ms.ToArray(), 0, ms.ToArray().Length);
//
// Return the hash
//
Pbkdf2 pbkdf2 = new Pbkdf2(hmac512, hmac512.Hash, secretKey);
return(pbkdf2.GetBytes(length));
}
public bool Verify()
{
_pbkdf2 = new Pbkdf2(_hmac512, _hmac512.Hash, _hmacSalt, NumberOfRoundsForSecurEntity);
bool result = _hmacResult.SequenceEqual(_pbkdf2.GetBytes(HashBlockLength));
return(result);
}
public static byte[] GetStringColumnValueThumbprint(
byte[] secretKey,
string colVal,
string extraData)
{
HMACSHA512 hmac512 = new HMACSHA512(secretKey);
//
// Add the data
//
MemoryStream ms = new MemoryStream();
BinaryWriter bw = new BinaryWriter(ms);
bw.Write(colVal);
bw.Write(extraData);
bw.Close();
hmac512.TransformFinalBlock(
ms.ToArray(),
0,
ms.ToArray().Length);
//
// Return the hash
//
Pbkdf2 pbkdf2 = new Pbkdf2(hmac512, hmac512.Hash, secretKey, NumberOfRoundsForSecurEntity);
return(pbkdf2.GetBytes(HashBlockLength));
}
public override string ToString()
{
MemoryStream ms = new MemoryStream();
BinaryWriter bw = new BinaryWriter(ms);
bw.Write(CurrentVersion);
bw.Write(_cipherSalt);
bw.Write(_hmacSalt);
bw.Write(_iv);
_pbkdf2 = new Pbkdf2(_hmac512, _hmac512.Hash, _hmacSalt, NumberOfRoundsForSecurEntity);
// bw.Write(hmac512.Hash);
bw.Write(_pbkdf2.GetBytes(HashBlockLength));
bw.Close();
return(Convert.ToBase64String(ms.ToArray()));
}
