zoumaliveServer/system/saas/SAASCryptAES.php

<?php

class SAASCryptAES

{

    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);
    }
}

?>