C#之AES256位加密解密
密码学中的高级加密标准（Advanced Encryption Standard，AES），又称Rijndael加密法，是美国联邦政府采用的一种区块加密标准。这个标准用来替代原先的DES，已经被多方分析且广为全世界所使用。
操作方法
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AES加密代码 /// <summary> /// AES加密 /// </summary> /// <param name="encryptStr">明文</param> /// <param name="key">密钥</param> /// <returns></returns> public static string Encrypt(string encryptStr,string key) { byte[] keyArray = UTF8Encoding.UTF8.GetBytes(key); byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(encryptStr); RijndaelManaged rDel = new RijndaelManaged(); rDel.Key = keyArray; rDel.Mode = CipherMode.ECB; rDel.Padding = PaddingMode.PKCS7; ICryptoTransform cTransform = rDel.CreateEncryptor(); byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length); return Convert.ToBase64String(resultArray, 0, resultArray.Length); }
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AES解密代码 /// <summary> /// AES解密 /// </summary> /// <param name="decryptStr">密文</param> /// <param name="key">密钥</param> /// <returns></returns> public static string Decrypt(string decryptStr,string key) { byte[] keyArray = UTF8Encoding.UTF8.GetBytes(key); byte[] toEncryptArray = Convert.FromBase64String(decryptStr); RijndaelManaged rDel = new RijndaelManaged(); rDel.Key = keyArray; rDel.Mode = CipherMode.ECB; rDel.Padding = PaddingMode.PKCS7; ICryptoTransform cTransform = rDel.CreateDecryptor(); byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length); return UTF8Encoding.UTF8.GetString(resultArray); }
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主程序入口，测试代码 static void Main(string[] args) { string encryptStr,decryptStr, key; key = "ae125efkk4454eeff444ferfkny6oxi8"; encryptStr = "C#AES加密字符串"; Console.WriteLine("============== 256位AES加密 ============\n"); Console.WriteLine("加密前的字符串："+encryptStr); Console.WriteLine("密钥：" + key); Console.WriteLine(); decryptStr = Program.Encrypt(encryptStr,key); Console.WriteLine("加密后的字符串：" + decryptStr); encryptStr = Program.Decrypt(decryptStr, key); Console.WriteLine("解密后的字符串：" + encryptStr); Console.ReadKey(); }
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运行结果