PHP与Java使用des加密通讯

http://www.pocketdigi.com/20121112/940.html

原文：http://toptulip.iteye.com/blog/780309 使用php加密字符串，生成密文，java解析密文还原字符串.
Java的部分直接复制调不通，改了下，下面的代码是能正常运行的。
php:

1. <?php
2. class DES
3. {
4. var $key;
5. var $iv; //偏移量
6.  
7. function DES($key, $iv=0)
8. {
9. $this->key = $key;
10. if($iv == 0)
11. {
12. $this->iv = $key;
13. }
14. else
15. {
16. $this->iv = $iv;
17. }
18. }
19.  
20. //加密
21. function encrypt($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 $str;
39. }
40.  
41. function hex2bin($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 $binData;
49. }
50.  
51. function pkcs5Pad($text, $blocksize)
52. {
53. $pad = $blocksize - (strlen ( $text ) % $blocksize);
54. return $text . str_repeat ( chr ( $pad ), $pad );
55. }
56.  
57. function pkcs5Unpad($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);
72.  
73. echo $str.' <=> '.$mstr;
74.  
75. ?>
76.  

java:

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());
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);
51. byte[] bytes = cipher.doFinal(data);
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. }
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()));
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. }
117.