- using System.Security.Cryptography;
- using System.IO;
- using System.Text;
-
-
- 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();
-
-
- }
-
-
- 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());
- }
- using System;
- using System.Text;
- using System.Globalization;
- using System.Security.Cryptography;
- class DES
- {
-
- public string GenerateKey()
- {
- DESCryptoServiceProvider desCrypto = (DESCryptoServiceProvider)DESCryptoServiceProvider.Create();
- return ASCIIEncoding.ASCII.GetString(desCrypto.Key);
- }
-
- public string EncryptString(string sInputString, string sKey)
- {
- byte [] data = Encoding.UTF8.GetBytes(sInputString);
- DESCryptoServiceProvider DES = new DESCryptoServiceProvider();
- DES.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
- DES.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
- ICryptoTransform desencrypt = DES.CreateEncryptor();
- byte [] result = desencrypt.TransformFinalBlock(data, 0, data.Length);
- return BitConverter.ToString(result);
- }
-
- public string DecryptString(string sInputString, string sKey)
- {
- string [] sInput = sInputString.Split("-".ToCharArray());
- byte [] data = new byte[sInput.Length];
- for(int i = 0; i < sInput.Length; i++)
- {
- data[i] = byte.Parse(sInput[i], NumberStyles.HexNumber);
- }
- DESCryptoServiceProvider DES = new DESCryptoServiceProvider();
- DES.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
- DES.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
- ICryptoTransform desencrypt = DES.CreateDecryptor();
- byte [] result = desencrypt.TransformFinalBlock(data, 0, data.Length);
- return Encoding.UTF8.GetString(result);
- }
- }
- class Test
- {
- static void Main()
- {
- DES des = new DES();
- string key = des.GenerateKey();
- string s0 = "中国软件 - csdn.net";
- string s1 = des.EncryptString(s0, key);
- string s2 = des.DecryptString(s1, key);
- Console.WriteLine("原串: [{0}]", s0);
- Console.WriteLine("加密: [{0}]", s1);
- Console.WriteLine("解密: [{0}]", s2);
- }
- }
posted @
2010-03-04 14:46
三月软件工作室——任忌
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