AaltoTLS.RecordLayer.RecordHandler.EncryptRecord C# (CSharp) Méthode

        private static void EncryptRecord(CipherSuite cipherSuite, Record record, ICryptoTransform cipher, byte[] nonceExplicit)
        {
            BulkCipherAlgorithmType cipherType = cipherSuite.BulkCipherAlgorithm.Type;
            int recordIVLength = cipherSuite.BulkCipherAlgorithm.RecordIVLength;

            // Add explicit IV if required by protocol version
            if (cipherType == BulkCipherAlgorithmType.Block && record.Version.HasExplicitIV) {
                byte[] explicitIV = new byte[recordIVLength];
                RNGCryptoServiceProvider rngCsp = new RNGCryptoServiceProvider();
                rngCsp.GetBytes(explicitIV);

                // Replace the fragment with a new fragment including explicit IV
                byte[] fragment = new byte[explicitIV.Length + record.Fragment.Length];
                Buffer.BlockCopy(explicitIV, 0, fragment, 0, explicitIV.Length);
                Buffer.BlockCopy(record.Fragment, 0, fragment, explicitIV.Length, record.Fragment.Length);
                record.Fragment = fragment;
            }

            // Replace the unencrypted fragment with the encrypted fragment
            record.Fragment = TransformRecordBytes(cipherType, cipher, record.Fragment);

            // Add explicit part of the nonce if using AEAD
            if (cipherType == BulkCipherAlgorithmType.AEAD) {
                byte[] fragment = new byte[nonceExplicit.Length + record.Fragment.Length];
                Buffer.BlockCopy(nonceExplicit, 0, fragment, 0, nonceExplicit.Length);
                Buffer.BlockCopy(record.Fragment, 0, fragment, nonceExplicit.Length, record.Fragment.Length);
                record.Fragment = fragment;
            }
        }