php与java通用AES加密解密算法

AES指高级加密标准（Advanced Encryption Standard）,是当前最流行的一种密码算法，在web应用开发，特别是对外提供接口时经常会用到，下面是我整理的一套php与java通用的AES加密解密算法。

php版代码如下：

<?php

class CryptAES

{

    protected $cipher = MCRYPT_RIJNDAEL_128;

    protected $mode = MCRYPT_MODE_ECB;

    protected $pad_method = NULL;

    protected $secret_key = '';

    protected $iv = '';

 

    public function set_cipher($cipher)

    {

        $this->cipher = $cipher;

    }

 

    public function set_mode($mode)

    {

        $this->mode = $mode;

    }

 

    public function set_iv($iv)

    {

        $this->iv = $iv;

    }

 

    public function set_key($key)

    {

        $this->secret_key = $key;

    }

 

    public function require_pkcs5()

    {

        $this->pad_method = 'pkcs5';

    }

 

    protected function pad_or_unpad($str, $ext)

    {

        if ( is_null($this->pad_method) )

        {

            return $str;

        }

        else

        {

            $func_name = __CLASS__ . '::' . $this->pad_method . '_' . $ext . 'pad';

            if ( is_callable($func_name) )

            {

                $size = mcrypt_get_block_size($this->cipher, $this->mode);

                return call_user_func($func_name, $str, $size);

            }

        }

        return $str;

    }

 

    protected function pad($str)

    {

        return $this->pad_or_unpad($str, '');

    }

 

    protected function unpad($str)

    {

        return $this->pad_or_unpad($str, 'un');

    }

 

    public function encrypt($str)

    {

        $str = $this->pad($str);

        $td = mcrypt_module_open($this->cipher, '', $this->mode, '');

 

        if ( empty($this->iv) )

        {

            $iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);

        }

        else

        {

            $iv = $this->iv;

        }

 

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

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

        $rt=base64_encode($cyper_text);

        //$rt = bin2hex($cyper_text);

        mcrypt_generic_deinit($td);

        mcrypt_module_close($td);

 

        return $rt;

    }

 

    public function decrypt($str){

        $td = mcrypt_module_open($this->cipher, '', $this->mode, '');

 

        if ( empty($this->iv) )

        {

            $iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);

        }

        else

        {

            $iv = $this->iv;

        }

 

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

        //$decrypted_text = mdecrypt_generic($td, self::hex2bin($str));

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

        $rt = $decrypted_text;

        mcrypt_generic_deinit($td);

        mcrypt_module_close($td);

 

        return $this->unpad($rt);

    }

 

    public static function hex2bin($hexdata) {

        $bindata = '';

        $length = strlen($hexdata);

        for ($i=0; $i amp;< $length; $i += 2)

        {

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

        }

        return $bindata;

    }

 

    public static function pkcs5_pad($text, $blocksize)

    {

        $pad = $blocksize - (strlen($text) % $blocksize);

        return $text . str_repeat(chr($pad), $pad);

    }

 

    public static function pkcs5_unpad($text)

    {

        $pad = ord($text{strlen($text) - 1});

        if ($pad > strlen($text)) return false;

        if (strspn($text, chr($pad), strlen($text) - $pad) != $pad) return false;

        return substr($text, 0, -1 * $pad);

    }

}

 

$keyStr = 'UITN25LMUQC436IM';

$plainText = 'this is a string will be AES_Encrypt';

 

$aes = new CryptAES();

$aes->set_key($keyStr);

$aes->require_pkcs5();

$encText = $aes->encrypt($plainText);

$decString = $aes->decrypt($encText);

 

echo $encText,"n",$decString;

 

?>

运行结果：
fhTD0NNIzv4jUEhJuC1htFFXJ/4S/rL6tDCJPiNvJ8mVLHWOD0HWweuxHynxoZf9
this is a string will be AES_Encrypt

java版代码如下：

import java.security.Key;

import javax.crypto.Cipher;

import javax.crypto.spec.SecretKeySpec;

 

import org.apache.commons.codec.binary.Base64;

  

public class CryptAES {

  

    private static final String AESTYPE ="AES/ECB/PKCS5Padding";

 

    public static String AES_Encrypt(String keyStr, String plainText) {

        byte[] encrypt = null;

        try{

            Key key = generateKey(keyStr);

            Cipher cipher = Cipher.getInstance(AESTYPE);

            cipher.init(Cipher.ENCRYPT_MODE, key);

            encrypt = cipher.doFinal(plainText.getBytes());    

        }catch(Exception e){

            e.printStackTrace();

        }

        return new String(Base64.encodeBase64(encrypt));

    }

 

    public static String AES_Decrypt(String keyStr, String encryptData) {

        byte[] decrypt = null;

        try{

            Key key = generateKey(keyStr);

            Cipher cipher = Cipher.getInstance(AESTYPE);

            cipher.init(Cipher.DECRYPT_MODE, key);

            decrypt = cipher.doFinal(Base64.decodeBase64(encryptData));

        }catch(Exception e){

            e.printStackTrace();

        }

        return new String(decrypt).trim();

    }

 

    private static Key generateKey(String key)throws Exception{

        try{           

            SecretKeySpec keySpec = new SecretKeySpec(key.getBytes(), "AES");

            return keySpec;

        }catch(Exception e){

            e.printStackTrace();

            throw e;

        }

 

    }

 

    public static void main(String[] args) {

         

        String keyStr = "UITN25LMUQC436IM"; 

 

        String plainText = "this is a string will be AES_Encrypt";

         

        String encText = AES_Encrypt(keyStr, plainText);

        String decString = AES_Decrypt(keyStr, encText);

         

        System.out.println(encText);

        System.out.println(decString);

 

    }

}

运行结果：
fhTD0NNIzv4jUEhJuC1htFFXJ/4S/rL6tDCJPiNvJ8mVLHWOD0HWweuxHynxoZf9
this is a string will be AES_Encrypt