Go语言视频零基础入门到精通

javalearner

工作中遇到的课题，要求简单的实现对所取到的手机号码进行加密。
老大只要求简单实现，比如移位……

1. import java.io.*;
   
2. import java.util.*;
   
3. import javax.servlet.*;
   
4. import javax.servlet.http.*;
   
5. import java.security.*;
   
6. import javax.crypto.*;
   
7. public class MyPhoneNum  extends HttpServlet {
   
8. private static String Algorithm="DES"; //定义 加密算法,可用 DES,DESede,Blowfish
   
9. static boolean debug = false;
   
10. static{
    
11.    Security.addProvider(new com.sun.crypto.provider.SunJCE());
    
12. }
    
13. //生成密钥, 注意此步骤时间比较长
    
14. public static byte[] getKey() throws Exception{
    
15.    KeyGenerator keygen = KeyGenerator.getInstance(Algorithm);
    
16.    SecretKey deskey = keygen.generateKey();
    
17.    if (debug)
    
18.      System.out.println("生成密钥:"+byte2hex(deskey.getEncoded()));
    
19.    return deskey.getEncoded();
    
20. }
    
21. //加密
    
22. public static byte[] encode(byte[] input,byte[] key) throws Exception{
    
23.    SecretKey deskey = new javax.crypto.spec.SecretKeySpec(key,Algorithm);
    
24.    if (debug){
    
25.      System.out.println("加密前的二进串:"+byte2hex(input));
    
26.      System.out.println("加密前的字符串:"+new String(input));
    
27.    }
    
28.    Cipher c1 = Cipher.getInstance(Algorithm);
    
29.    c1.init(Cipher.ENCRYPT_MODE,deskey);
    
30.    byte[] cipherByte=c1.doFinal(input);
    
31.    if (debug)
    
32.      System.out.println("加密后的二进串:"+byte2hex(cipherByte));
    
33.    return cipherByte;
    
34. }
    
35. //解密
    
36. public static byte[] decode(byte[] input,byte[] key) throws Exception{
    
37.    SecretKey deskey = new javax.crypto.spec.SecretKeySpec(key,Algorithm);
    
38.    if (debug)
    
39.      System.out.println("解密前的信息:"+byte2hex(input));   
    
40.    Cipher c1 = Cipher.getInstance(Algorithm);
    
41.    c1.init(Cipher.DECRYPT_MODE,deskey);
    
42.    byte[] clearByte=c1.doFinal(input);
    
43.    if (debug){
    
44.      System.out.println("解密后的二进串:"+byte2hex(clearByte));
    
45.      System.out.println("解密后的字符串:"+(new String(clearByte)));
    
46.    }
    
47.    return clearByte;
    
48. }
    
49. //md5()信息摘要, 不可逆
    
50. public static byte[] md5(byte[] input) throws Exception{
    
51.    java.security.MessageDigest alg=java.security.MessageDigest.getInstance("MD5"); //or "SHA-1"
    
52.    if (debug){
    
53.      System.out.println("摘要前的二进串:"+byte2hex(input));
    
54.      System.out.println("摘要前的字符串:"+new String(input));
    
55.    }
    
56.    alg.update(input);
    
57.    byte[] digest = alg.digest();
    
58.    if (debug)
    
59.      System.out.println("摘要后的二进串:"+byte2hex(digest));
    
60.    return digest;
    
61. }
    
62. //字节码转换成16进制字符串
    
63. public static String byte2hex(byte bytes[]){
    
64.    StringBuffer retString = new StringBuffer();
    
65.    for (int i = 0; i < bytes.length; ++i)
    
66.    {
    
67.      retString.append(Integer.toHexString(0x0100 + (bytes[i] & 0x00FF)).substring(1).toUpperCase());
    
68.    }
    
69.    return retString.toString();
    
70. }
    
71. //将16进制字符串转换成字节码
    
72. public static byte[] hex2byte(String hex) {
    
73.    byte[] bts = new byte[hex.length() / 2];
    
74.    for (int i = 0; i < bts.length; i++) {
    
75.       bts[i] = (byte) Integer.parseInt(hex.substring(2*i, 2*i+2), 16);
    
76.    }
    
77.    return bts;
    
78. }  
    
79. private void performTask(javax.servlet.http.HttpServletRequest request,
80.    javax.servlet.http.HttpServletResponse response) {
    
81.    String MISC_MSISDN = request.getHeader("X-Up-Calling-Line-ID");
    
82.    if(MISC_MSISDN==null) MISC_MSISDN = "13900000000";   
    
83.    
    
84.    
    
85.    try {      
    
86.      String getCode = this.getParameter(request,"code","0");
    
87.      String getKey = this.getParameter(request,"key","0");
    
88.      String getMd5 = this.getParameter(request,"md5","0");
    
89.      MISC_MSISDN = this.getParameter(request,"MISC_MSISDN",MISC_MSISDN);
90. 
    
91.      /*PrintWriter out1 = response.getWriter();
    
92.      out1.println(getCode);
    
93.      out1.println(getKey);
    
94.      out1.println(getMd5);
    
95.      out1.close();*/
    
96.      if(getCode.equals("0")){
    
97.        byte[] key = getKey();
    
98.        if (!getKey.equals("0")){
    
99.          key = hex2byte(getKey);
    
100.        }
     
101.        String strCode = byte2hex(encode(MISC_MSISDN.getBytes(),key));
     
102.        String strKey = byte2hex(key);
     
103.        String md5Num = byte2hex(md5(MISC_MSISDN.getBytes()));
     
104.        PrintWriter out = response.getWriter();
     
105.        out.println("Code:"+strCode);
     
106.        out.println("Key:"+strKey);
     
107.        out.println("md5 Phone Number:"+md5Num);
     
108.        out.close();
109. 
     
110.      }else{
     
111.        byte[] byteCode = hex2byte(getCode);
     
112.        byte[] byteKey = hex2byte(getKey);
     
113.        String strPhoneNum = new String(decode(byteCode,byteKey));
     
114.        PrintWriter out = response.getWriter();
     
115.        out.println("Phone Number:"+strPhoneNum);
     
116.        if (getMd5.equals("0")){
     
117.          out.println("None md5 check!");
     
118.        }else if (getMd5.equals(byte2hex(md5(strPhoneNum.getBytes())))){
     
119.          out.println("md5 check Ok!");
     
120.        }else{
     
121.          out.println("md5 check false!");
     
122.        }
     
123.        out.close();
     
124.      }
     
125.    }catch (Exception e) {
     
126.      System.out.println(e.getMessage());
     
127.    }
     
128.    
     
129. }
     
130. public void doGet(javax.servlet.http.HttpServletRequest request,
131.    javax.servlet.http.HttpServletResponse response) {
     
132.    performTask(request, response);
     
133. }
     
134. public void doPost(javax.servlet.http.HttpServletRequest request,
135.    javax.servlet.http.HttpServletResponse response) {
     
136.    performTask(request, response);
     
137.    }
     
138. private java.lang.String getParameter(javax.servlet.http.HttpServletRequest request,
139.    java.lang.String parameterName, java.lang.String defaultValue) throws java.lang.Exception {
     
140.    java.lang.String[] parameterValues = null;
     
141.    java.lang.String paramValue = null;
     
142.    
     
143.    parameterValues = request.getParameterValues(parameterName);
     
144.    if (parameterValues != null)
     
145.      paramValue = parameterValues[0];
     
146.    if (paramValue == null)
     
147.      paramValue = defaultValue;
     
148.      return paramValue;
     
149. }
     
150. }
     

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源码下载：http://file.javaxxz.com/2014/10/2/051349344.zip