internal override bool VerifyPass(string Password, TEncryptionParameters EncParams, TEncryptionKey Key)
{
if (!base.VerifyPass(Password, EncParams, Key))
{
return(false);
}
Key.CalcKey(TStandardEncryptionKey.BlockKey, null);
byte[] DecriptedVerifier;
byte[] DecriptedVerifierHash;
using (AesManaged Engine = TEncryptionUtils.CreateEngine(EncParams))
{
using (ICryptoTransform Decryptor = Engine.CreateDecryptor(Key.Key, Key.IV))
{
DecriptedVerifier = DecryptBytes(EncryptedVerifier, Decryptor, -1);
DecriptedVerifierHash = DecryptBytes(EncryptedVerifierHash, Decryptor, -1);
}
}
using (HashAlgorithm hasher = TEncryptionKey.CreateHasher())
{
byte[] DecriptedVerifierHash2 = hasher.ComputeHash(DecriptedVerifier);
if (!FlxUtils.CompareMem(DecriptedVerifierHash, 0, DecriptedVerifierHash2, 0, VerifierHashSizeBytes))
{
return(false);
}
}
return(true);
}
internal override bool VerifyPass(string Password, TEncryptionParameters EncParams, TEncryptionKey Key)
{
if (!base.VerifyPass(Password, EncParams, Key))
{
return(false);
}
using (AesManaged Engine = TEncryptionUtils.CreateEngine(EncParams))
{
byte[] DecriptedVerifierHashInput;
Key.CalcKey(TAgileEncryptionKey.VerifierHashInputBlockKey, null);
using (ICryptoTransform Decryptor = Engine.CreateDecryptor(Key.Key, Key.IV))
{
DecriptedVerifierHashInput = DecryptBytes(EncryptedVerifierHashInput, Decryptor, Key.Salt.Length); //this is the value padded to a blocksize multiple. We want only the Salt.Length initial bytes.
DecriptedVerifierHashInput = Key.Hash(DecriptedVerifierHashInput);
}
byte[] DecriptedVerifierHashValue;
Key.CalcKey(TAgileEncryptionKey.VerifierHashValueBlockKey, null);
using (ICryptoTransform Decryptor = Engine.CreateDecryptor(Key.Key, Key.IV))
{
DecriptedVerifierHashValue = DecryptBytes(EncryptedVerifierHashValue, Decryptor, DecriptedVerifierHashInput.Length); //this is the 20 byte value of the hash + 12 "0" so it goes up to 32. (32 is 2*blocksize)
}
if (!FlxUtils.CompareMem(DecriptedVerifierHashValue, DecriptedVerifierHashInput))
{
return(false);
}
byte[] DecriptedKeyValue;
Key.CalcKey(TAgileEncryptionKey.VerifierKeyValueBlockKey, null);
using (ICryptoTransform Decryptor = Engine.CreateDecryptor(Key.Key, Key.IV))
{
DecriptedKeyValue = DecryptBytes(EncryptedKeyValue, Decryptor, Key.KeySizeInBytes);
}
Key.Key = DecriptedKeyValue;
}
return(true);
}
