【转】PHP android ios相互兼容的AES加密算法

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 = ‘p4ssw0rd‘; #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(‘top secret message‘) . "<br/>";
echo $encryption->decrypt(‘EQyz+ukU+ss+Sinf15bApdYj5ANrRwY632v8EhrzLPk=‘);
?>

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 , [email protected] <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/AESCrypt-ObjC

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

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

转自：http://www.funboxpower.com/php_android_ios_aes