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ðŸ“ ..
ðŸ“„ ECDSA.php(1.55 KB)
ðŸ“„ ECSignature.php(4.35 KB)
ðŸ“„ ES256.php(1.41 KB)
ðŸ“„ ES256K.php(1.41 KB)
ðŸ“„ ES384.php(1.41 KB)
ðŸ“„ ES512.php(1.42 KB)

Editing: ES256K.php

<?php

declare(strict_types=1);

/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014-2019 Spomky-Labs
 *
 * This software may be modified and distributed under the terms
 * of the MIT license.  See the LICENSE file for details.
 */

namespace Cose\Algorithm\Signature\ECDSA;

use Cose\Key\Ec2Key;
use Cose\Key\Key;

final class ES256K extends ECDSA
{
    public const ID = -43;

public static function identifier(): int
    {
        return self::ID;
    }

public function sign(string $data, Key $key): string
    {
        $signature = parent::sign($data, $key);

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

public function verify(string $data, Key $key, string $signature): bool
    {
        if (mb_strlen($signature, '8bit') !== $this->getSignaturePartLength()) {
            @trigger_error('Since v2.1, the method "verify" will only accept raw ECDSA signature in v3.0 and ASN.1 structures will be rejected', E_USER_DEPRECATED);
        } else {
            $signature = ECSignature::toAsn1($signature, $this->getSignaturePartLength());
        }

return parent::verify($data, $key, $signature);
    }

protected function getHashAlgorithm(): int
    {
        return OPENSSL_ALGO_SHA256;
    }

protected function getCurve(): int
    {
        return Ec2Key::CURVE_P256K;
    }

protected function getSignaturePartLength(): int
    {
        return 64;
    }
}

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Editing: ES256K.php

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