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Question

js在页面用des加密，密文到后台用c#的des解密程序进行解密，请教高人？  

Answer 1

/// <summary>
/// DES解密,sKey可为8位或16位,默认请指定为:"8lvbe4kE"
/// </summary>
/// <param name="pToDecrypt">需要解密的字符串</param>
/// <param name="sKey">密钥</param>
/// <returns>解密后的字符串</returns>
public static string DESDecrypt(string pToDecrypt, string sKey)
{
        DESCryptoServiceProvider des = new DESCryptoServiceProvider();        byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
        for (int x = 0; x < pToDecrypt.Length / 2; x++)
        {
            int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));
            inputByteArray[x] = (byte)i;
        }        des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
        des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
        MemoryStream ms = new MemoryStream();
        CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
        cs.Write(inputByteArray, 0, inputByteArray.Length);
        cs.FlushFinalBlock();        StringBuilder ret = new StringBuilder();        return System.Text.Encoding.Default.GetString(ms.ToArray());
}