Net加密--自己记录一下

///MD5加密
public string MD5Encrypt(string pToEncrypt, string sKey)
{
   DESCryptoServiceProvider des = new DESCryptoServiceProvider();
   byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt);
   des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
   des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
   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();

}

///MD5解密
public string MD5Decrypt(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());
}