<?php

namespace Cose\Algorithm\Signature\ECDSA;

use Cose\Algorithm\Signature\Signature;
use Cose\Key\Ec2Key;
use Cose\Key\Key;
use InvalidArgumentException;

use function openssl_sign;
use function openssl_verify;

/**
 * @see \Cose\Tests\Algorithm\Signature\ECDSA\ECDSATest
 */
abstract class ECDSA implements Signature
{
    public function sign(string $data, Key $key): string
    {
        $key = $this->handleKey($key);
        openssl_sign($data, $signature, $key->asPEM(), $this->getHashAlgorithm());

        return ECSignature::fromAsn1($signature, $this->getSignaturePartLength());
    }

    public function verify(string $data, Key $key, string $signature): bool
    {
        $key = $this->handleKey($key);
        $publicKey = $key->toPublic();
        $signature = ECSignature::toAsn1($signature, $this->getSignaturePartLength());
        return openssl_verify($data, $signature, $publicKey->asPEM(), $this->getHashAlgorithm()) === 1;
    }

    abstract protected function getCurve(): int;

    abstract protected function getHashAlgorithm(): int;

    abstract protected function getSignaturePartLength(): int;

    private function handleKey(Key $key): Ec2Key
    {
        $key = Ec2Key::create($key->getData());
        if ($key->curve() !== $this->getCurve()) {
            throw new InvalidArgumentException('This key cannot be used with this algorithm');
        }

        return $key;
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----MjI0NTU4MzUyOTczMjE3MSA0Njg4NjQ0MzY3Mzk0MTk1IDY2NzIyODcxODAzMzA2NTM=