MD5加解密代码,CSharp代码库,德仔网

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【CSharp】 MD5加解密
作者:小小超 / 发布于2012/6/13/ 682
MD5加解密
<div>
<strong>其中的一个加密解密类：</strong>
<strong>using System;
using System.Collections.Generic;
using System.Text;
using System.Globalization;
using System.Security.Cryptography;
using System.IO;
namespace WindowsApplication2
{
class DES
{
// 创建Key
public string GenerateKey()
{
DESCryptoServiceProvider desCrypto = (DESCryptoServiceProvider)DESCryptoServiceProvider.Create();
return ASCIIEncoding.ASCII.GetString(desCrypto.Key);
}
///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();</strong>

<strong>        }</strong>
<strong>        ///MD5解密
public string MD5Decrypt(string pToDecrypt, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();</strong>
<strong>            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;
}</strong>
<strong>            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();</strong>
<strong>            StringBuilder ret = new StringBuilder();</strong>
<strong>            return System.Text.Encoding.Default.GetString(ms.ToArray());
}</strong>

<strong>    }
}</strong>
<strong>另外一个加密解密类：</strong>
<strong>using System;
using System.Text;
using System.IO;
using System.Globalization;
using System.Security.Cryptography;
using System.Collections.Generic;</strong>
<strong>namespace WindowsApplication2
{
class MD5
{
// 创建Key
public string GenerateKey()
{
DESCryptoServiceProvider desCrypto = (DESCryptoServiceProvider)DESCryptoServiceProvider.Create();
return ASCIIEncoding.ASCII.GetString(desCrypto.Key);
}
// 加密字符串
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);
}
// 解密字符串
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);
}</strong>
<strong>    }
}
</strong>
<strong>调用这两个类：</strong>
<strong>public partial class EDForm : Form
{
public EDForm()
{
InitializeComponent();
}
DES des = new DES();
string key = null;
/// <summary>
/// 加密字符串
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button1_Click(object sender, EventArgs e)
{
key = des.GenerateKey();
this.textBox2.Text = des.MD5Encrypt(textBox1.Text,key);
}</strong>
<strong>        private void button2_Click(object sender, EventArgs e)
{
MessageBox.Show(des.MD5Decrypt(textBox2.Text, key));
}
}</strong>
注意：在调用时key必须是同一个，如若不然就会报&ldquo;输入的数据格式不对&rdquo;错了。
</div>
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