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