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Android 和 PHP 之间进行数据加密传输

[代码] [Java]代码mcrypt = new MCrypt();/* Encrypt */String encrypted = MCrypt.bytesToHex( mcrypt.encrypt("Text to Encrypt") );/* Decrypt */String decrypted = new String( mcrypt......

[代码] [Java]代码

mcrypt = new MCrypt();

/* Encrypt */

String encrypted = MCrypt.bytesToHex( mcrypt.encrypt("Text to Encrypt") );

/* Decrypt */

String decrypted = new String( mcrypt.decrypt( encrypted ) );

[代码] [PHP]代码

$mcrypt = new MCrypt();

#Encrypt

$encrypted = $mcrypt->encrypt("Text to encrypt");

#Decrypt

$decrypted = $mcrypt->decrypt($encrypted);

[代码] MCrypt.java

/***********/

/**JAVA**/

import java.security.NoSuchAlgorithmException;

import javax.crypto.Cipher;

import javax.crypto.NoSuchPaddingException;

import javax.crypto.spec.IvParameterSpec;

import javax.crypto.spec.SecretKeySpec;

public class MCrypt {

private String iv = "fedcba9876543210";//Dummy iv (CHANGE IT!)

private IvParameterSpec ivspec;

private SecretKeySpec keyspec;

private Cipher cipher;

private String SecretKey = "0123456789abcdef";//Dummy secretKey (CHANGE IT!)

public MCrypt()

{

ivspec = new IvParameterSpec(iv.getBytes());

keyspec = new SecretKeySpec(SecretKey.getBytes(), "AES");

try {

cipher = Cipher.getInstance("AES/CBC/NoPadding");

} catch (NoSuchAlgorithmException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (NoSuchPaddingException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

public byte[] encrypt(String text) throws Exception

{

if(text == null || text.length() == 0)

throw new Exception("Empty string");

byte[] encrypted = null;

try {

cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);

encrypted = cipher.doFinal(padString(text).getBytes());

} catch (Exception e)

{

throw new Exception("[encrypt] " + e.getMessage());

}

return encrypted;

}

public byte[] decrypt(String code) throws Exception

{

if(code == null || code.length() == 0)

throw new Exception("Empty string");

byte[] decrypted = null;

try {

cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);

decrypted = cipher.doFinal(hexToBytes(code));

} catch (Exception e)

{

throw new Exception("[decrypt] " + e.getMessage());

}

return decrypted;

}

public static String bytesToHex(byte[] data)

{

if (data==null)

{

return null;

}

int len = data.length;

String str = "";

for (int i=0; i

if ((data[i]&0xFF)<16)

str = str + "0" + java.lang.Integer.toHexString(data[i]&0xFF);

else

str = str + java.lang.Integer.toHexString(data[i]&0xFF);

}

return str;

}

public static byte[] hexToBytes(String str) {

if (str==null) {

return null;

} else if (str.length() < 2) {

return null;

} else {

int len = str.length() / 2;

byte[] buffer = new byte[len];

for (int i=0; i<len; i++) {

buffer[i] = (byte) Integer.parseInt(str.substring(i*2,i*2+2),16);

}

return buffer;

}

}

private static String padString(String source)

{

char paddingChar = ' ';

int size = 16;

int x = source.length() % size;

int padLength = size - x;

for (int i = 0; i < padLength; i++)

{

source += paddingChar;

}

return source;

}

}

[代码] mcrypt.php

/**********/

/**PHP**/

<?php

class MCrypt

{

private $iv = 'fedcba9876543210'; #Same as in JAVA

private $key = '0123456789abcdef'; #Same as in JAVA

function __construct()

{

}

function encrypt($str) {

//$key = $this->hex2bin($key);

$iv = $this->iv;

$td = mcrypt_module_open('rijndael-128', '', 'cbc', $iv);

mcrypt_generic_init($td, $this->key, $iv);

$encrypted = mcrypt_generic($td, $str);

mcrypt_generic_deinit($td);

mcrypt_module_close($td);

return bin2hex($encrypted);

}

function decrypt($code) {

//$key = $this->hex2bin($key);

$code = $this->hex2bin($code);

$iv = $this->iv;

$td = mcrypt_module_open('rijndael-128', '', 'cbc', $iv);

mcrypt_generic_init($td, $this->key, $iv);

$decrypted = mdecrypt_generic($td, $code);

mcrypt_generic_deinit($td);

mcrypt_module_close($td);

return utf8_encode(trim($decrypted));

}

protected function hex2bin($hexdata) {

$bindata = '';

for ($i = 0; $i < strlen($hexdata); $i += 2) {

$bindata .= chr(hexdec(substr($hexdata, $i, 2)));

}

return $bindata;

}

}

// see http://androidsnippets.com/encrypt-decrypt-between-android-and-php