Android 和 PHP 之间进行数据加密传输
[代码] [Java]代码
1 mcrypt = new MCrypt();
2 /* Encrypt */
3 String encrypted = MCrypt.bytesToHex( mcrypt.encrypt("Text to Encrypt") );
4 /* Decrypt */
5 String decrypted = new String( mcrypt.decrypt( encrypted ) );
[代码] [PHP]代码
1 $mcrypt = new MCrypt();
2 #Encrypt
3 $encrypted = $mcrypt->encrypt("Text to encrypt");
4 #Decrypt
5 $decrypted = $mcrypt->decrypt($encrypted);
[代码] MCrypt.java
001 /***********/
002 /**JAVA**/
003
004 import java.security.NoSuchAlgorithmException;
005
006 import javax.crypto.Cipher;
007 import javax.crypto.NoSuchPaddingException;
008 import javax.crypto.spec.IvParameterSpec;
009 import javax.crypto.spec.SecretKeySpec;
010
011 public class MCrypt {
012
013 private String iv = "fedcba9876543210";//Dummy iv (CHANGE IT!)
014 private IvParameterSpec ivspec;
015 private SecretKeySpec keyspec;
016 private Cipher cipher;
017
018 private String SecretKey = "0123456789abcdef";//Dummy secretKey (CHANGE IT!)
019
020 public MCrypt()
021 {
022 ivspec = new IvParameterSpec(iv.getBytes());
023
024 keyspec = new SecretKeySpec(SecretKey.getBytes(), "AES");
025
026 try {
027 cipher = Cipher.getInstance("AES/CBC/NoPadding");
028 } catch (NoSuchAlgorithmException e) {
029 // TODO Auto-generated catch block
030 e.printStackTrace();
031 } catch (NoSuchPaddingException e) {
032 // TODO Auto-generated catch block
033 e.printStackTrace();
034 }
035 }
036
037 public byte[] encrypt(String text) throws Exception
038 {
039 if(text == null || text.length() == 0)
040 throw new Exception("Empty string");
041
042 byte[] encrypted = null;
043
044 try {
045 cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);
046
047 encrypted = cipher.doFinal(padString(text).getBytes());
048 } catch (Exception e)
049 {
050 throw new Exception("[encrypt] " + e.getMessage());
051 }
052
053 return encrypted;
054 }
055
056 public byte[] decrypt(String code) throws Exception
057 {
058 if(code == null || code.length() == 0)
059 throw new Exception("Empty string");
060
061 byte[] decrypted = null;
062
063 try {
064 cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);
065
066 decrypted = cipher.doFinal(hexToBytes(code));
067 } catch (Exception e)
068 {
069 throw new Exception("[decrypt] " + e.getMessage());
070 }
071 return decrypted;
072 }
073
074
075
076 public static String bytesToHex(byte[] data)
077 {
078 if (data==null)
079 {
080 return null;
081 }
082
083 int len = data.length;
084 String str = "";
085 for (int i=0; i<len; i++) {
086 if ((data[i]&0xFF)<16)
087 str = str + "0" + java.lang.Integer.toHexString(data[i]&0xFF);
088 else
089 str = str + java.lang.Integer.toHexString(data[i]&0xFF);
090 }
091 return str;
092 }
093
094
095 public static byte[] hexToBytes(String str) {
096 if (str==null) {
097 return null;
098 } else if (str.length() < 2) {
099 return null;
100 } else {
101 int len = str.length() / 2;
102 byte[] buffer = new byte[len];
103 for (int i=0; i<len; i++) {
104 buffer[i] = (byte) Integer.parseInt(str.substring(i*2,i*2+2),16);
105 }
106 return buffer;
107 }
108 }
109
110
111
112 private static String padString(String source)
113 {
114 char paddingChar = ' ';
115 int size = 16;
116 int x = source.length() % size;
117 int padLength = size - x;
118
119 for (int i = 0; i < padLength; i++)
120 {
121 source += paddingChar;
122 }
123
124 return source;
125 }
126 }
[代码] mcrypt.php
01 /**********/
02 /**PHP**/
03
04 <?php
05
06 class MCrypt
07 {
08 private $iv = 'fedcba9876543210'; #Same as in JAVA
09 private $key = '0123456789abcdef'; #Same as in JAVA
10
11
12 function __construct()
13 {
14 }
15
16 function encrypt($str) {
17
18 //$key = $this->hex2bin($key);
19 $iv = $this->iv;
20
21 $td = mcrypt_module_open('rijndael-128', '', 'cbc', $iv);
22
23 mcrypt_generic_init($td, $this->key, $iv);
24 $encrypted = mcrypt_generic($td, $str);
25
26 mcrypt_generic_deinit($td);
27 mcrypt_module_close($td);
28
29 return bin2hex($encrypted);
30 }
31
32 function decrypt($code) {
33 //$key = $this->hex2bin($key);
34 $code = $this->hex2bin($code);
35 $iv = $this->iv;
36
37 $td = mcrypt_module_open('rijndael-128', '', 'cbc', $iv);
38
39 mcrypt_generic_init($td, $this->key, $iv);
40 $decrypted = mdecrypt_generic($td, $code);
41
42 mcrypt_generic_deinit($td);
43 mcrypt_module_close($td);
44
45 return utf8_encode(trim($decrypted));
46 }
47
48 protected function hex2bin($hexdata) {
49 $bindata = '';
50
51 for ($i = 0; $i < strlen($hexdata); $i += 2) {
52 $bindata .= chr(hexdec(substr($hexdata, $i, 2)));
53 }
54
55 return $bindata;
56 }
57
58 }
59 // see http://androidsnippets.com/encrypt-decrypt-between-android-and-php
