求一个加密解密的方法

[wqandxxj]

最近客户要求对数据库中的一些数据进行加密解密，MD5之类的要么不能解密要么就是不支持silverlight，求一个可用的

[heren5201314]

/// <summary>
        /// 字符串加密
        /// </summary>
        /// <param name="input">输入的字符串</param>
        /// <param name="password">使用的密码</param>
        /// <returns>加密的字符串</returns>
        public static string Encrypt(string input, string password)
        {

            string data = input;
            byte[] utfdata = UTF8Encoding.UTF8.GetBytes(data);
            byte[] saltBytes = UTF8Encoding.UTF8.GetBytes(password);

            //加密算法
            AesManaged aes = new AesManaged();
            Rfc2898DeriveBytes rfc = new Rfc2898DeriveBytes(password, saltBytes);

            //设置参数
            aes.BlockSize = aes.LegalBlockSizes[0].MaxSize;
            aes.KeySize = aes.LegalKeySizes[0].MaxSize;
            aes.Key = rfc.GetBytes(aes.KeySize / 8);
            aes.IV = rfc.GetBytes(aes.BlockSize / 8);

            //加密
            ICryptoTransform encryptTransf = aes.CreateEncryptor();

            //输出流，也可以一个FileStream 
            MemoryStream encryptStream = new MemoryStream();
            CryptoStream encryptor = new CryptoStream(encryptStream, encryptTransf, CryptoStreamMode.Write);

            encryptor.Write(utfdata, 0, utfdata.Length);
            encryptor.Flush();
            encryptor.Close();

            byte[] encryptBytes = encryptStream.ToArray();
            string encryptedString = Convert.ToBase64String(encryptBytes);

            return encryptedString;
        }
       /// <summary>
       /// 解密字符串
        /// </summary>
        /// <param name="base64Input">输入解密</param>
        /// <param name="str">使用的密码</param>
        /// <returns>解密字符串</returns>
        public static string Decrypt(string base64Input, string str)
        {
            byte[] encryptBytes = Convert.FromBase64String(base64Input);
            byte[] saltBytes = Encoding.UTF8.GetBytes(str);
            //我们的加密算法
            AesManaged aes = new AesManaged();
            Rfc2898DeriveBytes rfc = new Rfc2898DeriveBytes(str, saltBytes);
            //设置参数
            aes.BlockSize = aes.LegalBlockSizes[0].MaxSize;
            aes.KeySize = aes.LegalKeySizes[0].MaxSize;
            aes.Key = rfc.GetBytes(aes.KeySize / 8);
            aes.IV = rfc.GetBytes(aes.BlockSize / 8);

            //开始解密
            ICryptoTransform decryptTrans = aes.CreateDecryptor();

            //输出流，也可以一个FileStream 
            MemoryStream decryptStream = new MemoryStream();
            CryptoStream decryptor = new CryptoStream(decryptStream, decryptTrans, CryptoStreamMode.Write);

            decryptor.Write(encryptBytes, 0, encryptBytes.Length);
            decryptor.Flush();
            decryptor.Close();

            byte[] decryptBytes = decryptStream.ToArray();
            string decryptedString = UTF8Encoding.UTF8.GetString(decryptBytes, 0, decryptBytes.Length);
            return decryptedString;
        } 

第二个参数传："saltValue"等

[zhongqingquan]

[/red]3DES,DES可以试试...

[sjfujiang]

[Quote=引用 1 楼 heren5201314 的回复:]

C# code

/// <summary>
/// 字符串加密
/// </summary>
/// <param name="input">输入的字符串</param>
/// <param name="password">使用的密码</param>
/// <returns>加密的字符串</returns>
……
[/Quote]
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