PHP与Java接口通讯使用AES对称加密

    private $key = '';
    private $vi = '';

    public function encrypt($encryptStr) {
        $localIV = $this->vi;
        $encryptKey = $this->key;
        //Open module
        $module = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, $localIV);
        //print "module = $module 
" ;
        mcrypt_generic_init($module, $encryptKey, $localIV);
        //Padding
        $block = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);
        $pad = $block - (strlen($encryptStr) % $block); //Compute how many characters need to pad
        $encryptStr .= str_repeat(chr($pad), $pad);
        // After pad, the str length must be equal to block or its integer multiples
        //encrypt
        $encrypted = mcrypt_generic($module, $encryptStr);
        //Close
        mcrypt_generic_deinit($module);
        mcrypt_module_close($module);
        //return base64_encode($encrypted);
        return bin2hex($encrypted);
    }

    /**
     * 解密
     * @param $encryptStr
     * @return string
     * @author Baip [email protected]
     */
    public function decrypt($encryptStr) {
        $localIV = $this->vi;
        $encryptKey = $this->key;
        //Open module
        $module = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, $localIV);
        //print "module = $module 
" ;
        mcrypt_generic_init($module, $encryptKey, $localIV);
        //$encryptedData = base64_decode($encryptStr);
        $encryptedData = hex2bin($encryptStr);
        $encryptedData = mdecrypt_generic($module, $encryptedData);
        return $encryptedData;
    }