PHP,安卓,ios相互适用的AES加密算法

http://wangsigui.blog.51cto.com/5362901/1340415

java的AES加密算法：

1import javax.crypto.Cipher;
2import javax.crypto.spec.IvParameterSpec;
3import javax.crypto.spec.SecretKeySpec;
4import android.util.Base64;
5/**
6 * @author vipin.cb , vipin.cb@experionglobal.com <br>
7 *         Sep 27, 2013, 5:18:34 PM <br>
8 *         Package:- <b>com.veebow.util</b> <br>
9 *         Project:- <b>Veebow</b>
10 *         <p>
11 */
12public class AESCrypt {
13    private final Cipher cipher;
14    private final SecretKeySpec key;
15    private AlgorithmParameterSpec spec;
16    public static final String SEED_16_CHARACTER = "U1MjU1M0FDOUZ.Qz";
17    public AESCrypt() throws Exception {
18        // hash password with SHA-256 and crop the output to 128-bit for key
19        MessageDigest digest = MessageDigest.getInstance("SHA-256");
20        digest.update(SEED_16_CHARACTER.getBytes("UTF-8"));
21        byte[] keyBytes = new byte[32];
22        System.arraycopy(digest.digest(), 0, keyBytes, 0, keyBytes.length);
23        cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
24        key = new SecretKeySpec(keyBytes, "AES");
25        spec = getIV();
26    }
27    public AlgorithmParameterSpec getIV() {
28        byte[] iv = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, };
29        IvParameterSpec ivParameterSpec;
30        ivParameterSpec = new IvParameterSpec(iv);
31        return ivParameterSpec;
32    }
33    public String encrypt(String plainText) throws Exception {
34        cipher.init(Cipher.ENCRYPT_MODE, key, spec);
35        byte[] encrypted = cipher.doFinal(plainText.getBytes("UTF-8"));
36        String encryptedText = new String(Base64.encode(encrypted,
37                Base64.DEFAULT), "UTF-8");
38        return encryptedText;
39    }
40    public String decrypt(String cryptedText) throws Exception {
41        cipher.init(Cipher.DECRYPT_MODE, key, spec);
42        byte[] bytes = Base64.decode(cryptedText, Base64.DEFAULT);
43        byte[] decrypted = cipher.doFinal(bytes);
44        String decryptedText = new String(decrypted, "UTF-8");
45        return decryptedText;
46    }
47}

PHP的AES加密算法：

1<?php
2class MCrypt {
3    private $hex_iv = '00000000000000000000000000000000'; # converted JAVA byte code in to HEX and placed it here           
4    private $key = 'U1MjU1M0FDOUZ.Qz'; #Same as in JAVA
5    function __construct() {
6        $this->key = hash('sha256', $this->key, true);
7        //echo $this->key.'<br/>';
8    }
9    function encrypt($str) {   
10        $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');
11        mcrypt_generic_init($td, $this->key, $this->hexToStr($this->hex_iv));
12        $block = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);
13        $pad = $block - (strlen($str) % $block);
14        $str .= str_repeat(chr($pad), $pad);
15        $encrypted = mcrypt_generic($td, $str);
16        mcrypt_generic_deinit($td);
17        mcrypt_module_close($td);    
18        return base64_encode($encrypted);
19    }
20    function decrypt($code) {    
21        $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');
22        mcrypt_generic_init($td, $this->key, $this->hexToStr($this->hex_iv));
23        $str = mdecrypt_generic($td, base64_decode($code));
24        $block = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);
25        mcrypt_generic_deinit($td);
26        mcrypt_module_close($td);    
27        return $this->strippadding($str);           
28    }
29    /*
30      For PKCS7 padding
31     */
32    private function addpadding($string, $blocksize = 16) {
33        $len = strlen($string);
34        $pad = $blocksize - ($len % $blocksize);
35        $string .= str_repeat(chr($pad), $pad);
36        return $string;
37    }
38    private function strippadding($string) {
39        $slast = ord(substr($string, -1));
40        $slastc = chr($slast);
41        $pcheck = substr($string, -$slast);
42        if (preg_match("/$slastc{" . $slast . "}/", $string)) {
43            $string = substr($string, 0, strlen($string) - $slast);
44            return $string;
45        } else {
46            return false;
47        }
48    }
49function hexToStr($hex)
50{
51    $string='';
52    for ($i=0; $i < strlen($hex)-1; $i+=2)
53    {
54        $string .= chr(hexdec($hex[$i].$hex[$i+1]));
55    }
56    return $string;
57}
58}
59$encryption = new MCrypt();
60echo $encryption->encrypt('123456') . "<br/>";
61echo $encryption->decrypt('tpyxISJ83dqEs3uw8bN/+w==');

参考：http://stackoverflow.com/questions/19196728/aes-128-encryption-in-java-decryption-in-php

IOS参考：

http://stackoverflow.com/questions/5928915/wanted-compatible-aes-code-encrypt-decrypt-for-iphone-android-windows-xp

https://github.com/Gurpartap/AESCrypt-ObjC