protected int HashLengthForDigest(DigestAlg digestAlg)
{
switch (digestAlg)
{
case DigestAlg alg when alg == DigestAlg.Sha256:
return(256 / 8);
case DigestAlg alg when alg == DigestAlg.Sha384:
return(384 / 8);
case DigestAlg alg when alg == DigestAlg.Sha512:
return(512 / 8);
default:
return(0);
}
}
public static byte[] GenerateKeyHash(BigInteger modulus, BigInteger publicExp, PaddingAlg padding, DigestAlg digest)
{
var magModulus = Utility.StripLeadingZeros(Utility.GetBytes(modulus));
var magPublicExponent = Utility.StripLeadingZeros(Utility.GetBytes(publicExp));
var hash = Utility.UnofficialHashKeyLengthPrefix(
KeyczarConst.KeyHashLength,
magModulus,
magPublicExponent,
padding.ToBytes(),
digest.ToBytes()
);
magModulus.Clear();
magPublicExponent.Clear();
return(hash);
}
public static byte[] GenerateKeyHash(byte[] aesKeyBytes, byte[] hmacKeyBytes, int hashlength, DigestAlg digest)
{
return(Utility.UnofficalHashKey(KeyczarConst.KeyHashLength,
Utility.GetBytes(aesKeyBytes.Length),
aesKeyBytes,
Utility.GetBytes(hmacKeyBytes.Length),
hmacKeyBytes,
Utility.GetBytes(hashlength), digest.ToBytes()));
}
