日期:2014-05-18  浏览次数:20544 次

关于DES加密和PIN-KEY,做过的来帮下忙
首先我对DES加密的各种算法不了解

在网上找了很多.net下的DES算法,要求输入的密钥都是8个字节的字符串

但是我现在手里面的密钥是16个字符的字符串。

比如我要求的密钥是:1234567812345678

但是我用方法传人这个密钥就会报错的————>“指定键的大小对于此算法无效。”

不懂这中间怎么转换,还是方法不对呢。

下面是加密的方法。

希望会的朋友帮下忙,很急的。。。

C# code
public static string DESEnCode(string pToEncrypt, string sKey)
    {
        pToEncrypt = HttpContext.Current.Server.UrlEncode(pToEncrypt);
        DESCryptoServiceProvider des = new DESCryptoServiceProvider();
        byte[] inputByteArray = Encoding.GetEncoding("UTF-8").GetBytes(pToEncrypt);

        des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
        des.IV = ASCIIEncoding.ASCII.GetBytes("1111111111111111");
        MemoryStream ms = new MemoryStream();
        CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);

        cs.Write(inputByteArray, 0, inputByteArray.Length);
        cs.FlushFinalBlock();

        StringBuilder ret = new StringBuilder();
        foreach (byte b in ms.ToArray())
        {
            ret.AppendFormat("{0:X2}", b);
        }
        ret.ToString();
        return ret.ToString().ToLower();
    }


------解决方案--------------------
C# code
        public static string My3DESEnCode(string pToEncrypt, string sKey)
        {
            pToEncrypt = HttpContext.Current.Server.UrlEncode(pToEncrypt);
            //DESCryptoServiceProvider des = new DESCryptoServiceProvider();
            SymmetricAlgorithm des = TripleDES.Create();
            byte[] inputByteArray = Encoding.GetEncoding("UTF-8").GetBytes(pToEncrypt);

            des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
            des.IV = ASCIIEncoding.ASCII.GetBytes("12345678");
            MemoryStream ms = new MemoryStream();
            CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);

            cs.Write(inputByteArray, 0, inputByteArray.Length);
            cs.FlushFinalBlock();

            StringBuilder ret = new StringBuilder();
            foreach (byte b in ms.ToArray())
            {
                ret.AppendFormat("{0:X2}", b);
            }
            ret.ToString();
            return ret.ToString().ToLower();
        }