void ComputeHmac(byte[] input, byte[] output)
{
var hash = new byte[_hmacAlgorithm.GetMacSize()];
_hmacAlgorithm.BlockUpdate(input, 0, input.Length);
_hmacAlgorithm.DoFinal(hash, 0);
Array.Copy(hash, output, output.Length);
}
/// <summary>
/// Creates a new PBKDF2 stream.
/// </summary>
/// <param name="hmacAlgorithm">
/// </param>
/// <param name="salt">
/// The salt.
/// A unique salt means a unique PBKDF2 stream, even if the original key is identical.
/// </param>
/// <param name="iterations">The number of iterations to apply.</param>
#if USEBC || WINDOWS_UWP || NETCORE
public Pbkdf2(nStratis.BouncyCastle.crypto.IMac hmacAlgorithm, byte[] salt, int iterations)
{
nStratis.Crypto.Cryptsharp.Check.Null("hmacAlgorithm", hmacAlgorithm);
nStratis.Crypto.Cryptsharp.Check.Null("salt", salt);
nStratis.Crypto.Cryptsharp.Check.Length("salt", salt, 0, int.MaxValue - 4);
nStratis.Crypto.Cryptsharp.Check.Range("iterations", iterations, 1, int.MaxValue);
int hmacLength = hmacAlgorithm.GetMacSize();
_saltBuffer = new byte[salt.Length + 4];
Array.Copy(salt, _saltBuffer, salt.Length);
_iterations = iterations;
_hmacAlgorithm = hmacAlgorithm;
_digest = new byte[hmacLength];
_digestT1 = new byte[hmacLength];
}