public void Concat()
{
byte[] arg1 = { 97, 29, 31, 55, 17, 0, 129 };
byte[] arg2 = { 12, 33, 14, 40, 199, 244, 87 };
byte[] expected = { 97, 29, 31, 55, 17, 0, 129, 12, 33, 14, 40, 199, 244, 87 };
CollectionAssert.AreEqual(expected, ByteArraysUtils.Concat(arg1, arg2));
}
public byte[] EMSA_PSS_Encoding(byte[] M, int k, int sLen)
{
int hLen = hash.HashSize;
int emLen = k / 8;
var mHash = hash.ComputeHash(M);
if (emLen < hLen + sLen + 2)
{
throw new EncodingException();
}
byte[] salt = ByteArraysUtils.GetRandomOctets(RNGCryptoServiceProvider.Create(), sLen);
var M_dash = ByteArraysUtils.Concat(new byte[] { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, ByteArraysUtils.Concat(mHash, salt));
var H = hash.ComputeHash(M_dash);
var PS = new byte[emLen - sLen - hLen - 2];
var DB = ByteArraysUtils.Concat(ByteArraysUtils.Concat(PS, new byte[] { 0x01 }), salt);
var dbMask = mgf.MGF1(H, emLen - hLen - 1, hash);
var maskedDB = ByteArraysUtils.XorBytes(DB, dbMask);
maskedDB[0] &= (byte)(0xFF >> (8 * emLen - k));
var EM = ByteArraysUtils.Concat(ByteArraysUtils.Concat(maskedDB, H), new byte[] { 0xbc });
return(EM);
}