<?php

namespace Jose\Component\KeyManagement\Analyzer;

use Brick\Math\BigInteger;
use Jose\Component\Core\JWK;
use Jose\Component\Core\Util\Ecc\Curve;
use ParagonIE\ConstantTime\Base64UrlSafe;

use function is_string;

abstract class ESKeyAnalyzer implements KeyAnalyzer
{
    public function analyze(JWK $jwk, MessageBag $bag): void
    {
        if ($jwk->get('kty') !== 'EC') {
            return;
        }
        if (! $jwk->has('crv')) {
            $bag->add(Message::high('Invalid key. The components "crv" is missing.'));

            return;
        }
        if ($jwk->get('crv') !== $this->getCurveName()) {
            return;
        }
        $x = $jwk->get('x');
        if (! is_string($x)) {
            $bag->add(Message::high('Invalid key. The components "x" shall be a string.'));

            return;
        }
        $x = Base64UrlSafe::decodeNoPadding($x);
        $xLength = 8 * mb_strlen($x, '8bit');
        $y = $jwk->get('y');
        if (! is_string($y)) {
            $bag->add(Message::high('Invalid key. The components "y" shall be a string.'));

            return;
        }
        $y = Base64UrlSafe::decodeNoPadding($y);
        $yLength = 8 * mb_strlen($y, '8bit');
        if ($yLength !== $xLength || $yLength !== $this->getKeySize()) {
            $bag->add(
                Message::high(sprintf(
                    'Invalid key. The components "x" and "y" size shall be %d bits.',
                    $this->getKeySize()
                ))
            );
        }
        $xBI = BigInteger::fromBase(bin2hex($x), 16);
        $yBI = BigInteger::fromBase(bin2hex($y), 16);
        if (! $this->getCurve()->contains($xBI, $yBI)) {
            $bag->add(Message::high('Invalid key. The point is not on the curve.'));
        }
    }

    abstract protected function getAlgorithmName(): string;

    abstract protected function getCurveName(): string;

    abstract protected function getCurve(): Curve;

    abstract protected function getKeySize(): int;
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NjQzNjM0MjYxNTYwOTI0NiAyMTQyODk5OTM2MDI3NzIzIDQ4NzI1MTI3MjkyMjY1ODU=