Esempi in C# (CSharp) per System.Security.Cryptography.HMACSHA256.Initialize

Esempio n. 1

File: FE1.cs Progetto: ChristosMylonas/FPE

            internal FPE_Encryptor(byte[] key,
                                   BigInteger n,
                                   byte[] tweak)
            {
                mac = new System.Security.Cryptography.HMACSHA256(key);
                mac.Initialize();

                byte[] n_bin = n.encode();

                if (n_bin.Length > MAX_N_BYTES)
                {
                    throw new Exception("N is too large for FPE encryption");
                }

                var ms = new MemoryStream();

                ms.update_be(n_bin.Length);
                ms.update(n_bin);

                ms.update_be(tweak.Length);
                ms.update(tweak);

                mac_n_t = mac.ComputeHash(ms.ToArray());
            }