php代码:
[post]

复制代码

1. <?php
2. class DES
3. {
4. var $key;
5. var $iv; //偏移量
7. function DES($key, $iv=0)
8. {
9. $this->key = $key;
10. if($iv == 0)
11. {
12. $this->iv = $key;
13. }
14. else
15. {
16. $this->iv = $iv;
17. }
18. }
20. //加密
21. function encrypt($str)
22. {
23. $size = mcrypt_get_block_size ( MCRYPT_DES, MCRYPT_MODE_CBC );
24. $str = $this->pkcs5Pad ( $str, $size );
26. $data=mcrypt_cbc(MCRYPT_DES, $this->key, $str, MCRYPT_ENCRYPT, $this->iv);
27. //$data=strtoupper(bin2hex($data)); //返回大写十六进制字符串
28. return base64_encode($data);
29. }
31. //解密
32. function decrypt($str)
33. {
34. $str = base64_decode ($str);
35. //$strBin = $this->hex2bin( strtolower($str));
36. $str = mcrypt_cbc(MCRYPT_DES, $this->key, $str, MCRYPT_DECRYPT, $this->iv );
37. $str = $this->pkcs5Unpad( $str );
38. return $str;
39. }
41. function hex2bin($hexData)
42. {
43. $binData = "";
44. for($i = 0; $i < strlen ( $hexData ); $i += 2)
45. {
46. $binData .= chr(hexdec(substr($hexData, $i, 2)));
47. }
48. return $binData;
49. }
51. function pkcs5Pad($text, $blocksize)
52. {
53. $pad = $blocksize - (strlen ( $text ) % $blocksize);
54. return $text . str_repeat ( chr ( $pad ), $pad );
55. }
57. function pkcs5Unpad($text)
58. {
59. $pad = ord ( $text {strlen ( $text ) - 1} );
60. if ($pad > strlen ( $text ))
61. return false;
62. if (strspn ( $text, chr ( $pad ), strlen ( $text ) - $pad ) != $pad)
63. return false;
64. return substr ( $text, 0, - 1 * $pad );
65. }
66. }
67. $str = 'abcd';
68. $key= 'asdfwef5';
69. $crypt = new DES($key);
70. $mstr = $crypt->encrypt($str);
71. $str = $crypt->decrypt($mstr);
73. echo $str.' <=> '.$mstr;
75. ?>

[/post]

java代码:
[post]

复制代码

1. package com.test;
2.   
3. import it.sauronsoftware.base64.Base64;
4.   
5. import java.security.Key;
6. import java.security.SecureRandom;
7. import java.security.spec.AlgorithmParameterSpec;
8.   
9. import javax.crypto.Cipher;
10. import javax.crypto.SecretKeyFactory;
11. import javax.crypto.spec.DESKeySpec;
12. import javax.crypto.spec.IvParameterSpec;
13.   
14. public class Main
15. {
16.   public static final String ALGORITHM_DES = "DES/CBC/PKCS5Padding";
17.   /**
18.    * DES算法，加密
19.    *
20.    * @param data 待加密字符串
21.    * @param key 加密私钥，长度不能够小于8位
22.    * @return 加密后的字节数组，一般结合Base64编码使用
23.    * @throws CryptException 异常
24.    */
25.   public static String encode(String key,String data) throws Exception
26.   {
27.     return encode(key, data.getBytes());
28.   }
29.   /**
30.    * DES算法，加密
31.    *
32.    * @param data 待加密字符串
33.    * @param key 加密私钥，长度不能够小于8位
34.    * @return 加密后的字节数组，一般结合Base64编码使用
35.    * @throws CryptException 异常
36.    */
37.   public static String encode(String key,byte[] data) throws Exception
38.   {
39.     try
40.     {
41.         DESKeySpec dks = new DESKeySpec(key.getBytes());
42.   
43.         SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
44.       //key的长度不能够小于8位字节
45.       Key secretKey = keyFactory.generateSecret(dks);
46.       Cipher cipher = Cipher.getInstance(ALGORITHM_DES);
47.       IvParameterSpec iv = new IvParameterSpec(key.getBytes());
48.       AlgorithmParameterSpec paramSpec = iv;
49.       cipher.init(Cipher.ENCRYPT_MODE, secretKey,paramSpec);
50.   
51.       byte[] bytes = cipher.doFinal(data);
52.   
53.   
54. //      return byte2hex(bytes);
55.       return new String(Base64.encode(bytes));
56.     } catch (Exception e)
57.     {
58.       throw new Exception(e);
59.     }
60.   }
61.   
62.   /**
63.    * DES算法，解密
64.    *
65.    * @param data 待解密字符串
66.    * @param key 解密私钥，长度不能够小于8位
67.    * @return 解密后的字节数组
68.    * @throws Exception 异常
69.    */
70.   public static byte[] decode(String key,byte[] data) throws Exception
71.   {
72.     try
73.     {
74.         SecureRandom sr = new SecureRandom();
75.         DESKeySpec dks = new DESKeySpec(key.getBytes());
76.         SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
77.       //key的长度不能够小于8位字节
78.       Key secretKey = keyFactory.generateSecret(dks);
79.       Cipher cipher = Cipher.getInstance(ALGORITHM_DES);
80.       IvParameterSpec iv = new IvParameterSpec(key.getBytes());
81.       AlgorithmParameterSpec paramSpec = iv;
82.       cipher.init(Cipher.DECRYPT_MODE, secretKey,paramSpec);
83.       return cipher.doFinal(data);
84.     } catch (Exception e)
85.     {
86.       throw new Exception(e);
87.     }
88.   }
89.   
90.   /**
91.    * 获取编码后的值
92.    * @param key
93.    * @param data
94.    * @return
95.    * @throws Exception
96.    */
97.   public static String decodeValue(String key,String data)
98.   {
99.     byte[] datas;
100.     String value = null;
101.         try {
102.   
103.             datas = decode(key, Base64.decode(data.getBytes()));
104.   
105.             value = new String(datas);
106.         } catch (Exception e) {
107.             value = "";
108.         }
109.     return value;
110.   }
111.   
112.   public static void main(String[] args) throws Exception
113.   {
114.     System.out.println("明：abcd ；密：" + Main.encode("asdfwef5","abcd"));
115.   }
116. }

[/post]