学步园

项目需要在两个系统间采用DES加密，一个系统为Java开发的，另外一个.NET开发的

在网上找了很多写法但加密出的数据两个系统都无法匹配，

在做了小修改以后终于可以用了，已经测试过

上代码：

Java代码：

 1 import javax.crypto.Cipher;   

 

 2 import javax.crypto.SecretKey;   
 3 import javax.crypto.SecretKeyFactory;   
 4 import javax.crypto.spec.DESKeySpec;   
 5 import javax.crypto.spec.IvParameterSpec;   
 6   
 7   
 8 public class Des {   
 9     private byte[] desKey;   
10   
11        
12     //解密数据   
13     public static String decrypt(String message,String key) throws Exception {   
14             
15             byte[] bytesrc =convertHexString(message);      
16             Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");       
17             DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8"));      
18             SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");      
19             SecretKey secretKey = keyFactory.generateSecret(desKeySpec);      
20             IvParameterSpec iv = new IvParameterSpec(key.getBytes("UTF-8"));   
21                    
22             cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);         
23              
24             byte[] retByte = cipher.doFinal(bytesrc);        
25             return new String(retByte);    
26     }   
27   
28     public static byte[] encrypt(String message, String key)   
29             throws Exception {   
30         Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");   
31   
32         DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8"));   
33   
34         SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");   
35         SecretKey secretKey = keyFactory.generateSecret(desKeySpec);   
36         IvParameterSpec iv = new IvParameterSpec(key.getBytes("UTF-8"));   
37         cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv);   
38   
39         return cipher.doFinal(message.getBytes("UTF-8"));   
40     }   
41        
42     public static byte[] convertHexString(String ss)    
43     {    
44     byte digest[] = new byte[ss.length() / 2];    
45     for(int i = 0; i < digest.length; i++)    
46     {    
47     String byteString = ss.substring(2 * i, 2 * i + 2);    
48     int byteValue = Integer.parseInt(byteString, 16);    
49     digest[i] = (byte)byteValue;    
50     }    
51   
52     return digest;    
53     }    
54   
55   
56     public static void main(String[] args) throws Exception {   
57         String key = "12345678";   
58         String value="test1234 ";   
59         String jiami=java.net.URLEncoder.encode(value, "utf-8").toLowerCase();   
60            
61         System.out.println("加密数据:"+jiami);   
62         String a=toHexString(encrypt(jiami, key)).toUpperCase();   
63            
64        
65         System.out.println("加密后的数据为:"+a);   
66         String b=java.net.URLDecoder.decode(decrypt(a,key), "utf-8") ;   
67         System.out.println("解密后的数据:"+b);   
68   
69     }   
70   
71        
72     public static String toHexString(byte b[]) {   
73         StringBuffer hexString = new StringBuffer();   
74         for (int i = 0; i < b.length; i++) {   
75             String plainText = Integer.toHexString(0xff & b[i]);   
76             if (plainText.length() < 2)   
77                 plainText = "0" + plainText;   
78             hexString.append(plainText);   
79         }   
80            
81         return hexString.toString();   
82     }   
83   
84 } 

.NET代码

 1 using System;   

 

 2 using System.Data;   
 3 using System.Configuration;   
 4 using System.Web;   
 5 using System.Web.Security;   
 6 using System.Web.UI;   
 7 using System.Web.UI.WebControls;   
 8 using System.Web.UI.WebControls.WebParts;   
 9 using System.Web.UI.HtmlControls;   
10 using System.Data.SqlClient;   
11 using System.Security.Cryptography;   
12 using System.IO;   
13 using System.Text;   
14 public class TestDes{   
15     //cookies加密密钥   
16     public static string DES_Key = "12345678";  
17  
18     #region DESEnCode DES加密   
19     public static string DESEnCode(string pToEncrypt, string sKey)   
20     {   
21         pToEncrypt = HttpContext.Current.Server.UrlEncode(pToEncrypt);   
22         DESCryptoServiceProvider des = new DESCryptoServiceProvider();   
23         byte[] inputByteArray = Encoding.GetEncoding("UTF-8").GetBytes(pToEncrypt);   
24   
25          
26         des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);   
27         des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);   
28         MemoryStream ms = new MemoryStream();   
29         CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);   
30   
31         cs.Write(inputByteArray, 0, inputByteArray.Length);   
32         cs.FlushFinalBlock();   
33   
34         StringBuilder ret = new StringBuilder();   
35         foreach (byte b in ms.ToArray())   
36         {   
37             ret.AppendFormat("{0:X2}", b);   
38         }   
39         ret.ToString();   
40         return ret.ToString();   
41     }  
42     #endregion  
43  
44     #region DESDeCode DES解密   
45     public static string DESDeCode(string pToDecrypt, string sKey)   
46     {   
47         //    HttpContext.Current.Response.Write(pToDecrypt + "<br>" + sKey);   
48         //    HttpContext.Current.Response.End();   
49         DESCryptoServiceProvider des = new DESCryptoServiceProvider();   
50   
51         byte[] inputByteArray = new byte[pToDecrypt.Length / 2];   
52         for (int x = 0; x < pToDecrypt.Length / 2; x++)   
53         {   
54             int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));   
55             inputByteArray[x] = (byte)i;   
56         }   
57   
58         des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);   
59         des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);   
60         MemoryStream ms = new MemoryStream();   
61         CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);   
62         cs.Write(inputByteArray, 0, inputByteArray.Length);   
63         cs.FlushFinalBlock();   
64   
65         StringBuilder ret = new StringBuilder();   
66   
67         return HttpContext.Current.Server.UrlDecode(System.Text.Encoding.Default.GetString(ms.ToArray()));   
68     }  
69     #endregion   
70   
71       public TestDes()   
72     {   
73         //   
74         // TODO: 在此处添加构造函数逻辑   
75         //   
76     }   
77 }