url加密问题

Question

使用System.Web.Security.?找一个加密的类，把Url的查询参数加密，然后重新组合Url，在要使用该查询参数的页面解密，这样子应该可以了。

Answer 1

需要引用的类名空间
Code
using System.Security.Cryptography;
using System.IO;
using System.text;
Code
  /// <summary>
        /// 加密
        /// </summary>
        /// <param name="str"></param>
        /// <param name="key"></param>
        /// <returns></returns>
        public static string Encode(string str, string key)
        {
            DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
            provider.Key = Encoding.ASCII.GetBytes(key.Substring(0, 8));
            provider.IV = Encoding.ASCII.GetBytes(key.Substring(0, 8));
            byte[] bytes = Encoding.GetEncoding("GB2312").GetBytes(str);
            MemoryStream stream = new MemoryStream();
            CryptoStream stream2 = new CryptoStream(stream, provider.CreateEncryptor(), CryptoStreamMode.Write);
            stream2.Write(bytes, 0, bytes.Length);
            stream2.FlushFinalBlock();
            StringBuilder builder = new StringBuilder();
            foreach (byte num in stream.ToArray())
            {
                builder.AppendFormat("{0:X2}", num);
            }
            stream.Close();
            return builder.ToString();
        }        /// <summary>
        /// Des 解密 GB2312 
        /// </summary>
        /// <param name="str">Desc string</param>
        /// <param name="key">Key ,必须为8位 </param>
        /// <returns></returns>
        public static string Decode(string str, string key)
        {
            DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
            provider.Key = Encoding.ASCII.GetBytes(key.Substring(0, 8));
            provider.IV = Encoding.ASCII.GetBytes(key.Substring(0, 8));
            byte[] buffer = new byte[str.Length / 2];
            for (int i = 0; i < (str.Length / 2); i++)
            {
                int num2 = Convert.ToInt32(str.Substring(i * 2, 2), 0x10);
                buffer[i] = (byte)num2;
            }
            MemoryStream stream = new MemoryStream();
            CryptoStream stream2 = new CryptoStream(stream, provider.CreateDecryptor(), CryptoStreamMode.Write);
            stream2.Write(buffer, 0, buffer.Length);
            stream2.FlushFinalBlock();
            stream.Close();
            return Encoding.GetEncoding("GB2312").GetString(stream.ToArray());
        }调用方法
  /// <summary>
        /// If don't input key , Use default key
        /// Des 加密 GB2312 :
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static string Encode(string str)
        {
            return VerifyTool.Encode(str, "Rainight");
        }
        /// <summary>
        /// 解密
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static string Decode(string str)
        {
            return VerifyTool.Decode(str, "Rainight");
        }

Answer 2

自定义加密方法如md5,despublic static string Encrypt(string toEncrypt) {
    byte[] keyArray = UTF8Encoding.UTF8.GetBytes("12345678901234567890123456789012");
    byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(toEncrypt);    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);
}
public static string Decrypt(string toDecrypt) {
    byte[] keyArray = UTF8Encoding.UTF8.GetBytes("12345678901234567890123456789012");
    byte[] toEncryptArray = Convert.FromBase64String(toDecrypt);    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);
}