Java与.NET DES加密解密互转[转载]

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

1Java代码：
2import javax.crypto.Cipher; 
3import javax.crypto.SecretKey; 
4import javax.crypto.SecretKeyFactory; 
5import javax.crypto.spec.DESKeySpec; 
6import javax.crypto.spec.IvParameterSpec; 
7
8
9public class Des { 
10private byte[] desKey;
11    
12    
13//解密数据 
14public static String decrypt(String message,String key)
15throws Exception { 
16        
17byte[] bytesrc =convertHexString(message); 
18Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding"); 
19DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8"));
20SecretKeyFactory keyFactory = 
21SecretKeyFactory.getInstance("DES"); 
22SecretKey secretKey = keyFactory.generateSecret(desKeySpec); 
23IvParameterSpec iv = new IvParameterSpec(
24key.getBytes("UTF-8")); 
25        
26cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);
27        
28byte[] retByte = cipher.doFinal(bytesrc); 
29return new String(retByte); 
30} 
31    
32public static byte[] encrypt(String message, String key) 
33throws Exception {
34Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding"); 
35        
36DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8")); 
37        
38SecretKeyFactory keyFactory = 
39SecretKeyFactory.getInstance("DES"); 
40SecretKey secretKey = keyFactory.generateSecret(desKeySpec); 
41IvParameterSpec iv = 
42new IvParameterSpec(key.getBytes("UTF-8")); 
43cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv); 
44        
45return cipher.doFinal(message.getBytes("UTF-8")); 
46} 
47    
48public static byte[] convertHexString(String ss) 
49{
50byte digest[] = new byte[ss.length() / 2]; 
51for(int i = 0; i < digest.length; i++) 
52{ 
53String byteString = ss.substring(2 * i, 2 * i + 2); 
54int byteValue = Integer.parseInt(byteString, 16);
55digest[i] = (byte)byteValue;
56} 
57        
58return digest; 
59} 
60    
61    
62public static void main(String[] args) throws Exception 
63{ 
64String key = "12345678";
65String value="test1234 "; 
66String jiami=java.net.URLEncoder.encode(
67value, "utf-8").toLowerCase();
68        
69System.out.println("加密数据:"+jiami); 
70String a=toHexString(encrypt(jiami, key)).toUpperCase(); 
71        
72        
73System.out.println("加密后的数据为:"+a); 
74String b=java.net.URLDecoder.decode(decrypt(a,key), "utf-8") ;
75System.out.println("解密后的数据:"+b); 
76        
77} 
78    
79    
80public static String toHexString(byte b[]) 
81{ 
82StringBuffer hexString = new StringBuffer(); 
83for (int i = 0; i < b.length; i++) 
84{ 
85String plainText = Integer.toHexString(0xff & b[i]); 
86if (plainText.length() < 2) plainText = "0" + plainText;
87hexString.append(plainText);
88} 
89        
90return hexString.toString();
91} 
92} 
93
94
95.NET代码
96using System; 
97using System.Data; 
98using System.Configuration; 
99using System.Web; 
100using System.Web.Security; 
101using System.Web.UI; 
102using System.Web.UI.WebControls; 
103using System.Web.UI.WebControls.WebParts; 
104using System.Web.UI.HtmlControls; 
105using System.Data.SqlClient; 
106using System.Security.Cryptography; 
107using System.IO;
108using System.Text; 
109
110public class TestDes{ 
111//cookies加密密钥 
112public static string DES_Key = "12345678"; 
113    
114#region DESEnCode DES加密 
115public static string DESEnCode(string pToEncrypt, string sKey) 
116{ 
117pToEncrypt = HttpContext.Current.Server.UrlEncode(pToEncrypt); 
118DESCryptoServiceProvider des = new DESCryptoServiceProvider(); 
119byte[] inputByteArray = 
120Encoding.GetEncoding("UTF-8").GetBytes(pToEncrypt); 
121        
122        
123des.Key = ASCIIEncoding.ASCII.GetBytes(sKey); 
124des.IV = ASCIIEncoding.ASCII.GetBytes(sKey); 
125MemoryStream ms = new MemoryStream();
126CryptoStream cs = new CryptoStream(
127ms, des.CreateEncryptor(), CryptoStreamMode.Write); 
128        
129cs.Write(inputByteArray, 0, inputByteArray.Length); 
130cs.FlushFinalBlock(); 
131        
132StringBuilder ret = new StringBuilder(); 
133foreach (byte b in ms.ToArray()) 
134{ 
135ret.AppendFormat("{0:X2}", b); 
136} 
137ret.ToString(); 
138return ret.ToString(); 
139} 
140#endregion 
141    
142#region DESDeCode DES解密 
143public static string DESDeCode(string pToDecrypt, string sKey) 
144{ 
145// HttpContext.Current.Response.Write(
146//     pToDecrypt + "<br>" + sKey);
147// HttpContext.Current.Response.End(); 
148DESCryptoServiceProvider des = new DESCryptoServiceProvider(); 
149        
150byte[] inputByteArray = new byte[pToDecrypt.Length / 2]; 
151for (int x = 0; x < pToDecrypt.Length / 2; x++) 
152{ 
153int i = (Convert.ToInt32(pToDecrypt.Substring(
154x * 2, 2), 16)); 
155inputByteArray[x] = (byte)i; 
156} 
157        
158des.Key = ASCIIEncoding.ASCII.GetBytes(sKey); 
159des.IV = ASCIIEncoding.ASCII.GetBytes(sKey); 
160MemoryStream ms = new MemoryStream(); 
161CryptoStream cs = new CryptoStream(
162ms, des.CreateDecryptor(), CryptoStreamMode.Write); 
163cs.Write(inputByteArray, 0, inputByteArray.Length); 
164cs.FlushFinalBlock(); 
165        
166StringBuilder ret = new StringBuilder(); 
167        
168        
169return HttpContext.Current.Server.UrlDecode(
170System.Text.Encoding.Default.GetString(ms.ToArray()));
171} 
172#endregion 
173    
174public TestDes() 
175{ 
176// 
177// TODO: 在此处添加构造函数逻辑 
178// 
179} 
180}