private static function hmac_sm3()

in signature/php/src/SignatureUtil.php [97:110]

• 13 lines of code
• 3 McCabe index (conditional complexity)

    private static function hmac_sm3($data, $key, $raw_output = false)
    {
        $pack      = 'H' . \strlen(self::sm3('test'));
        $blocksize = 64;
        if (\strlen($key) > $blocksize) {
            $key = pack($pack, self::sm3($key));
        }
        $key  = str_pad($key, $blocksize, \chr(0x00));
        $ipad = $key ^ str_repeat(\chr(0x36), $blocksize);
        $opad = $key ^ str_repeat(\chr(0x5C), $blocksize);
        $hmac = self::sm3($opad . pack($pack, self::sm3($ipad . $data)));

        return $raw_output ? pack($pack, $hmac) : $hmac;
    }