APP项目用户密码传输一直没有用HTTPS，考虑到用户的隐私暂时先用AES对密码加密，以后也可以用于手机端与服务端加密交互。

PHP的免费版phpAES项目，手机端解码各种不对。

好不容易找了PHP ANDROID IOS，相互加解密正常的AES加密算法代码。

PHP的AES加密算法：

<?php

class MCrypt {

    private $hex_iv = '00000000000000000000000000000000'; # converted JAVA byte code in to HEX and placed it here          

    private $key = 'U1MjU1M0FDOUZ.Qz'; #Same as in JAVA

    function __construct() {

        $this->key = hash('sha256', $this->key, true);

        //echo $this->key.'<br/>';

    }

    function encrypt($str) {  

        $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');

        mcrypt_generic_init($td, $this->key, $this->hexToStr($this->hex_iv));

        $block = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);

        $pad = $block - (strlen($str) % $block);

        $str .= str_repeat(chr($pad), $pad);

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

        mcrypt_generic_deinit($td);

        mcrypt_module_close($td);   

        return base64_encode($encrypted);

    }

    function decrypt($code) {   

        $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');

        mcrypt_generic_init($td, $this->key, $this->hexToStr($this->hex_iv));

        $str = mdecrypt_generic($td, base64_decode($code));

        $block = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);

        mcrypt_generic_deinit($td);

        mcrypt_module_close($td);   

        return $this->strippadding($str);          

    }

    /*

      For PKCS7 padding

     */

    private function addpadding($string, $blocksize = 16) {

        $len = strlen($string);

        $pad = $blocksize - ($len % $blocksize);

        $string .= str_repeat(chr($pad), $pad);

        return $string;

    }

    private function strippadding($string) {

        $slast = ord(substr($string, -1));

        $slastc = chr($slast);

        $pcheck = substr($string, -$slast);

        if (preg_match("/$slastc{" . $slast . "}/", $string)) {

            $string = substr($string, 0, strlen($string) - $slast);

            return $string;

        } else {

            return false;

        }

    }

function hexToStr($hex)

{

    $string='';

    for ($i=0; $i < strlen($hex)-1; $i+=2)

    {

        $string .= chr(hexdec($hex[$i].$hex[$i+1]));

    }

    return $string;

}

}

$encryption = new MCrypt();

echo $encryption->encrypt('123456') . "<br/>";

echo $encryption->decrypt('tpyxISJ83dqEs3uw8bN/+w==');

 

?>

java的AES加密算法：

import javax.crypto.Cipher;

import javax.crypto.spec.IvParameterSpec;

import javax.crypto.spec.SecretKeySpec;

import android.util.Base64;

/**

 * @author vipin.cb , vipin.cb@experionglobal.com <br>

 *         Sep 27, 2013, 5:18:34 PM <br>

 *         Package:- <b>com.veebow.util</b> <br>

 *         Project:- <b>Veebow</b>

 *         <p>

 */

public class AESCrypt {

    private final Cipher cipher;

    private final SecretKeySpec key;

    private AlgorithmParameterSpec spec;

    public static final String SEED_16_CHARACTER = "U1MjU1M0FDOUZ.Qz";

    public AESCrypt() throws Exception {

        // hash password with SHA-256 and crop the output to 128-bit for key

        MessageDigest digest = MessageDigest.getInstance("SHA-256");

        digest.update(SEED_16_CHARACTER.getBytes("UTF-8"));

        byte[] keyBytes = new byte[32];

        System.arraycopy(digest.digest(), 0, keyBytes, 0, keyBytes.length);

        cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");

        key = new SecretKeySpec(keyBytes, "AES");

        spec = getIV();

    }

    public AlgorithmParameterSpec getIV() {

        byte[] iv = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, };

        IvParameterSpec ivParameterSpec;

        ivParameterSpec = new IvParameterSpec(iv);

        return ivParameterSpec;

    }

    public String encrypt(String plainText) throws Exception {

        cipher.init(Cipher.ENCRYPT_MODE, key, spec);

        byte[] encrypted = cipher.doFinal(plainText.getBytes("UTF-8"));

        String encryptedText = new String(Base64.encode(encrypted,

                Base64.DEFAULT), "UTF-8");

        return encryptedText;

    }

    public String decrypt(String cryptedText) throws Exception {

        cipher.init(Cipher.DECRYPT_MODE, key, spec);

        byte[] bytes = Base64.decode(cryptedText, Base64.DEFAULT);

        byte[] decrypted = cipher.doFinal(bytes);

        String decryptedText = new String(decrypted, "UTF-8");

        return decryptedText;

    }

}

IOS的AES加密算法：

https://github.com/Gurpartap/…

stackoverflow参考
http://stackoverflow.com/ques…

http://stackoverflow.com/ques…