private static byte[] Hi1(UsernamePasswordCredential credential, byte[] salt, int iterations)
{
var passwordDigest = AuthenticationHelper.MongoPasswordDigest(credential.Username, credential.Password);
using (var deriveBytes = new Rfc2898DeriveBytes(passwordDigest, salt, iterations, HashAlgorithmName.SHA1))
{
// 20 is the length of output of a sha-1 hmac
return(deriveBytes.GetBytes(20));
}
}
private static byte[] Hi256(char[] passwordChars, byte[] salt, int iterations)
{
var passwordBytes = new byte[Utf8Encodings.Strict.GetByteCount(passwordChars)];
var passwordBytesHandle = GCHandle.Alloc(passwordBytes, GCHandleType.Pinned);
try
{
Utf8Encodings.Strict.GetBytes(passwordChars, 0, passwordChars.Length, passwordBytes, 0);
using (var deriveBytes = new Rfc2898DeriveBytes(passwordBytes, salt, iterations, HashAlgorithmName.SHA256))
{
// 32 is the length of output of a sha-256 hmac
return(deriveBytes.GetBytes(32));
}
}
finally
{
Array.Clear(passwordBytes, 0, passwordBytes.Length);
passwordBytesHandle.Free();
}
}
