Esempio n. 1
0
        public static string Decrypt(byte[] cypherText, string cnxString)
        {
            using (AesManaged aes = new AesManaged())
            {
                AESUtilityInfo p = ReadParams(cnxString: cnxString);

                ICryptoTransform decryptor = aes.CreateDecryptor(p.Key, p.IV);

                using (MemoryStream msDecrypt = new MemoryStream(cypherText))
                {
                    using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
                    {
                        using (StreamReader swDecrypt = new StreamReader(csDecrypt)) // utf-8
                        {
                            return(swDecrypt.ReadToEnd());
                        }
                    }
                }
            }
        }
Esempio n. 2
0
        public static byte[] Encrypt(string clearText, string cnxString)
        {
            using (AesManaged aes = new AesManaged())
            {
                byte[] tmpKey;
                byte[] tmpIV;

                AESUtilityInfo p = ReadParams(cnxString: cnxString);

                if (p == null)
                {
                    tmpKey = aes.Key;
                    tmpIV  = aes.IV;

                    PersistParams(aes.Key, aes.IV, cnxString: cnxString);
                }
                else
                {
                    tmpKey = p.Key;
                    tmpIV  = p.IV;
                }

                ICryptoTransform encryptor = aes.CreateEncryptor(tmpKey, tmpIV);

                using (MemoryStream msEncrypt = new MemoryStream())
                {
                    using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
                    {
                        using (StreamWriter swEncrypt = new StreamWriter(csEncrypt)) // utf-8
                        {
                            swEncrypt.Write(clearText);
                        }

                        return(msEncrypt.ToArray());
                    }
                }
            }
        }