/// <summary> /// AES解密 /// </summary> /// <param name="cipherText">密文字符串</param> /// <param name="Key">密钥</param> /// <returns>返回解密后的明文字符串</returns> public string AESDecrypt(string showText, string Key, AesKeyLength keyLengh) { int keyL = 32; switch (keyLengh) { case AesKeyLength.Long256: keyL = 32; break; case AesKeyLength.Middle128: keyL = 16; break; case AesKeyLength.Short64: keyL = 8; break; } Byte[] encryptedBytes = Convert.FromBase64String(showText); Byte[] bKey = new Byte[keyL]; Array.Copy(Encoding.UTF8.GetBytes(Key.PadRight(bKey.Length)), bKey, bKey.Length); MemoryStream mStream = new MemoryStream(encryptedBytes); //mStream.Write( encryptedBytes, 0, encryptedBytes.Length ); //mStream.Seek( 0, SeekOrigin.Begin ); RijndaelManaged aes = new RijndaelManaged(); aes.Mode = CipherMode.ECB; aes.Padding = PaddingMode.PKCS7; aes.KeySize = 128; aes.Key = bKey; //aes.IV = _iV; CryptoStream cryptoStream = new CryptoStream(mStream, aes.CreateDecryptor(), CryptoStreamMode.Read); try { byte[] tmp = new byte[encryptedBytes.Length + 32]; int len = cryptoStream.Read(tmp, 0, encryptedBytes.Length + 32); byte[] ret = new byte[len]; Array.Copy(tmp, 0, ret, 0, len); return(Encoding.UTF8.GetString(ret)); } finally { cryptoStream.Close(); mStream.Close(); aes.Clear(); } }
/// <summary> /// AES加密算法 /// </summary> /// <param name="plainText">明文字符串</param> /// <param name="Key">密钥</param> /// <returns>将加密后的密文转换为Base64编码,以便显示</returns> public string AESEncrypt(string plainText, string Key, AesKeyLength keyLengh) { int keyL = 32; switch (keyLengh) { case AesKeyLength.Long256: keyL = 32; break; case AesKeyLength.Middle128: keyL = 16; break; case AesKeyLength.Short64: keyL = 8; break; } MemoryStream mStream = new MemoryStream(); RijndaelManaged aes = new RijndaelManaged(); byte[] plainBytes = Encoding.UTF8.GetBytes(plainText); Byte[] bKey = new Byte[keyL]; Array.Copy(Encoding.UTF8.GetBytes(Key.PadRight(bKey.Length)), bKey, bKey.Length); aes.Mode = CipherMode.ECB; aes.Padding = PaddingMode.PKCS7; aes.KeySize = 128; //aes.Key = _key; aes.Key = bKey; //aes.IV = _iV; CryptoStream cryptoStream = new CryptoStream(mStream, aes.CreateEncryptor(), CryptoStreamMode.Write); try { cryptoStream.Write(plainBytes, 0, plainBytes.Length); cryptoStream.FlushFinalBlock(); return(Convert.ToBase64String(mStream.ToArray())); } finally { cryptoStream.Close(); mStream.Close(); aes.Clear(); } }