Exemple #1
0
        public byte[] Encrypt(PublicKey recipientPublicKey, byte[] plaintext, byte[] macData)
        {
            byte[]     iv = _cryptoRandom.GenerateRandomBytes(KeySize / 8);
            PrivateKey ephemeralPrivateKey = _keyGenerator.Generate();

            IIesEngine iesEngine = MakeIesEngine(true, recipientPublicKey, ephemeralPrivateKey, iv);

            try
            {
                byte[]       cipher       = iesEngine.ProcessBlock(plaintext, 0, plaintext.Length, macData);
                MemoryStream memoryStream = new MemoryStream();
                memoryStream.Write(ephemeralPrivateKey.PublicKey.PrefixedBytes, 0, ephemeralPrivateKey.PublicKey.PrefixedBytes.Length);
                memoryStream.Write(iv, 0, iv.Length);
                memoryStream.Write(cipher, 0, cipher.Length);
                return(memoryStream.ToArray());
            }
            catch (InvalidCipherTextException)
            {
                throw;
            }
            catch (IOException)
            {
                throw;
            }
        }
Exemple #2
0
        private byte[] Decrypt(PublicKey ephemeralPublicKey, PrivateKey privateKey, byte[] iv, byte[] ciphertextBody, byte[] macData)
        {
            IIesEngine iesEngine = MakeIesEngine(false, ephemeralPublicKey, privateKey, iv);

            return(iesEngine.ProcessBlock(ciphertextBody, 0, ciphertextBody.Length, macData));
        }