信息计算2019级2班6号李靓

李靓

李靓

1. package StringTest;
   
2. 
   
3. import javax.crypto.Cipher;
   
4. import javax.crypto.KeyGenerator;
   
5. import javax.crypto.spec.IvParameterSpec;
   
6. import javax.crypto.spec.SecretKeySpec;
   
7. import java.math.BigInteger;
   
8. import java.util.Base64;
   
9. 
   
10. 
    
11. public class AesUtil {
    
12.     //密钥 (需要前端和后端保持一致)
    
13.     public static final String KEY = "ASDFGHJKLZXCVBNM";
    
14.     //算法
    
15.     private static final String ALGORITHMSTR = "AES/CBC/PKCS5Padding";
    
16.     //密钥
    
17.     public static final String IV_KEY = "QWERTYUIOPZXCVBN";
    
18. 
    
19.    
    
20.     private static final String ALGORITHMSTRCSS = "AES/ECB/PKCS5Padding";
    
21. 
    
22. 
    
23.     public static String aesDecrypt(String encrypt) {
    
24.         try {
    
25.             return aesDecrypt(encrypt, KEY);
    
26.         } catch (Exception e) {
    
27.             e.printStackTrace();
    
28.             return "";
    
29.         }  
    
30.     }  
    
31.       
    
32. 
    
33.     public static String aesEncrypt(String content) {  
    
34.         try {
    
35.             return aesEncrypt(content, KEY);
    
36.         } catch (Exception e) {
    
37.             e.printStackTrace();
    
38.             return "";
    
39.         }
    
40.     }
    
41. 
    
42.    
    
43.     public static String binary(byte[] bytes, int radix){
    
44.         return new BigInteger(1, bytes).toString(radix);// 这里的1代表正数
    
45.     }
    
46. 
    
47.    
    
48.     public static String base64Encode(byte[] bytes){
    
49.         return Base64.getMimeEncoder().encodeToString(bytes);
    
50.     }
    
51. 
    
52.     public static byte[] base64Decode(String base64Code) throws Exception{
    
53.         return base64Code == null || base64Code.trim().length() <= 0 ? null : Base64.getMimeDecoder().decode(base64Code);
    
54.     }
    
55. 
    
56. 
    
57.   
    
58.     public static byte[] aesEncryptToBytes(String content, String encryptKey) throws Exception {
    
59.         KeyGenerator kgen = KeyGenerator.getInstance("AES");
    
60.         kgen.init(128);
    
61.         Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
    
62.       
    
63.         IvParameterSpec iv = new IvParameterSpec(IV_KEY.getBytes("UTF-8"));
    
64.         cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(encryptKey.getBytes("UTF-8"), "AES"),iv);
    
65.         return cipher.doFinal(content.getBytes("utf-8"));
    
66.         
    
67.     }
    
68.   
    
69. 
    
70.     public static String aesEncrypt(String content, String encryptKey) throws Exception {  
    
71.         return base64Encode(aesEncryptToBytes(content, encryptKey));  
    
72.     }  
    
73.   
    
74. 
    
75.     public static String aesDecryptByBytes(byte[] encryptBytes, String decryptKey) throws Exception {  
    
76.         KeyGenerator kgen = KeyGenerator.getInstance("AES");  
    
77.         kgen.init(128);  
    
78.         
    
79.         Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
    
80.       
    
81.         IvParameterSpec iv = new IvParameterSpec(IV_KEY.getBytes("UTF-8"));
    
82.         cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(decryptKey.getBytes("UTF-8"), "AES"),iv);
    
83.         byte[] decryptBytes = cipher.doFinal(encryptBytes);
    
84.         return new String(decryptBytes,"UTF-8");
    
85. 
    
86.     }
    
87. 
    
88. 
    
89.    
    
90.     public static String aesDecrypt(String encryptStr, String decryptKey) throws Exception {
    
91.         return encryptStr == null || encryptStr.trim().length() <= 0  ? null : aesDecryptByBytes(base64Decode(encryptStr), decryptKey);
    
92.     }
    
93. 
    
94. 
    
95.     public static String mobileDesensitization(String mobile) {
    
96.         if (mobile != null && mobile.trim().length() > 0 ) {
    
97.             return mobile;
    
98.         }
    
99. 
    
100.         if (mobile.length() == 11) {
     
101.             return mobile.replaceAll("(\\d{3})\\d{4}(\\d{4})", "$1****$2");
     
102.         } else {
     
103. 
     
104.             return aesDecrypt(mobile).replaceAll("(\\d{3})\\d{4}(\\d{4})", "$1****$2");
     
105.         }
     
106.     }
     
107. 
     
108.    
     
109.     public static byte[] cssAesEncryptToBytes(String content, String encryptKey) throws Exception {
     
110.         KeyGenerator kgen = KeyGenerator.getInstance("AES");
     
111.         kgen.init(128);
     
112.         Cipher cipher = Cipher.getInstance(ALGORITHMSTRCSS);
     
113.         cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(encryptKey.getBytes("UTF-8"), "AES"));
     
114.         return cipher.doFinal(content.getBytes("utf-8"));
     
115.     }
     
116. 
     
117.    
     
118.     public static String cssAesDecryptByBytes(byte[] encryptBytes, String decryptKey) throws Exception {
     
119.         KeyGenerator kgen = KeyGenerator.getInstance("AES");
     
120.         kgen.init(128);
     
121. 
     
122.         Cipher cipher = Cipher.getInstance(ALGORITHMSTRCSS);
     
123.         cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(decryptKey.getBytes("UTF-8"), "AES"));
     
124.         byte[] decryptBytes = cipher.doFinal(encryptBytes);
     
125.         return new String(decryptBytes,"UTF-8");
     
126.     }
     
127. 
     
128.    
     
129.     public static String cssAesEncrypt(String content, String encryptKey) throws Exception {
     
130.         return base64Encode(cssAesEncryptToBytes(content, encryptKey));
     
131.     }
     
132. 
     
133.    
     
134.     public static byte[] cssBase64Decode(String base64Code) throws Exception{
     
135.         return base64Code == null || base64Code.trim().length() <= 0  ? null : Base64.getDecoder().decode(base64Code);
     
136.     }
     
137. 
     
138.   
     
139.     public static String cssAesDecrypt(String encryptStr, String decryptKey) throws Exception {
     
140.         return encryptStr == null || encryptStr.trim().length() <= 0 ? null : cssAesDecryptByBytes(cssBase64Decode(encryptStr), decryptKey);
     
141.     }
     
142. 
     
143. 
     
144.    
     
145.     public static void main(String[] args) throws Exception {  
     
146.         String content = "密码学";
     
147.         System.out.println("加密前：" + content);  
     
148.       
     
149.         String encrypt = aesEncrypt(content, KEY);
     
150.         System.out.println("加密后：" + encrypt);
     
151.         String decrypt = aesDecrypt(encrypt, KEY);
     
152.         System.out.println("解密后：" + decrypt);
     
153.         
     
154.         String encryptPhoneNum = "12345";
     
155.         String phoneNum = AesUtil.aesEncrypt(encryptPhoneNum);
     
156.         
     
157.         String decryptPhoneNum = AesUtil.aesDecrypt( phoneNum);
     
158.       
     
159.     }
     
160. }
     

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