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1package BOOT-INF.classes.com.zykj.ipfs.util;
2
3import com.zykj.ipfs.util.Base64;
4import java.security.SecureRandom;
5import java.util.HashMap;
6import java.util.Map;
7import javax.crypto.Cipher;
8import javax.crypto.KeyGenerator;
9import javax.crypto.SecretKey;
10import javax.crypto.SecretKeyFactory;
11import javax.crypto.spec.DESKeySpec;
12import org.slf4j.Logger;
13import org.slf4j.LoggerFactory;
14import org.springframework.util.StringUtils;
15
16public class DESEncodeUtil {
17  private static Logger logger = LoggerFactory.getLogger(com.zykj.ipfs.util.DESEncodeUtil.class);
18  
19  private static final String DES = "DES";
20  
21  private static final String des_key = "oWtPBKd1ZBk=";
22  
23  public static String genKeyDES() throws Exception {
24    KeyGenerator keyGen = KeyGenerator.getInstance("DES");
25    keyGen.init(56);
26    SecretKey key = keyGen.generateKey();
27    String base64Str = byte2base64(key.getEncoded());
28    return base64Str;
29  }
30  
31  private static String byte2base64(byte[] bytes) {
32    Base64 base64 = new Base64();
33    return Base64.encode(bytes);
34  }
35  
36  public static String encrypt(String data) {
37    String strs = "";
38    try {
39      byte[] bt = encrypt(data.getBytes(), "oWtPBKd1ZBk=".getBytes());
40      new Base64();
41      strs = Base64.encode(bt);
42    } catch (Exception e) {
43      e.printStackTrace();
44    } 
45    return strs;
46  }
47  
48  public static String decrypt(String data) {
49    if (data == null)
50      return null; 
51    String str = "";
52    try {
53      Base64 decoder = new Base64();
54      byte[] buf = Base64.decode(data);
55      byte[] bt = decrypt(buf, "oWtPBKd1ZBk=".getBytes());
56      str = new String(bt);
57    } catch (Exception e) {
58      e.printStackTrace();
59    } 
60    return str;
61  }
62  
63  public static Map<String, String> decryptParam(String param) {
64    if (StringUtils.isEmpty(param))
65      return null; 
66    String paramStr = decrypt(param);
67    String[] paramArr = paramStr.split("&");
68    Map<String, String> paramMap = new HashMap<>();
69    for (String p : paramArr) {
70      String[] pArr = p.split("=");
71      paramMap.put(pArr[0], pArr[1]);
72    } 
73    return paramMap;
74  }
75  
76  private static byte[] encrypt(byte[] data, byte[] key) throws Exception {
77    SecureRandom sr = new SecureRandom();
78    DESKeySpec dks = new DESKeySpec(key);
79    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
80    SecretKey securekey = keyFactory.generateSecret(dks);
81    Cipher cipher = Cipher.getInstance("DES");
82    cipher.init(1, securekey, sr);
83    return cipher.doFinal(data);
84  }
85  
86  private static byte[] decrypt(byte[] data, byte[] key) throws Exception {
87    SecureRandom sr = new SecureRandom();
88    DESKeySpec dks = new DESKeySpec(key);
89    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
90    SecretKey securekey = keyFactory.generateSecret(dks);
91    Cipher cipher = Cipher.getInstance("DES");
92    cipher.init(2, securekey, sr);
93    return cipher.doFinal(data);
94  }
95  
96  public static void main(String[] args) throws Exception {
97    String r = "peppaextestpwd";
98    System.out.println("+ r);
99    StringBuffer stringBuffer = new StringBuffer(r);
100    r = stringBuffer.insert(3, r.charAt(r.length() - 1)).toString();
101    r = stringBuffer.insert(1, r.charAt(r.length() - 2)).toString();
102    r = stringBuffer.insert(5, r.charAt(r.length() - 2)).toString();
103    r = encrypt(r);
104    System.out.println("+ r);
105    String a = decrypt(r);
106    String substring = a.substring(0, a.length() - 3);
107    StringBuffer buffer = new StringBuffer(substring);
108    buffer = buffer.deleteCharAt(5);
109    buffer = buffer.deleteCharAt(1);
110    String string = buffer.deleteCharAt(3).toString();
111    System.out.println("+ string);
112    System.out.println(string);
113  }
114}
115