<?php

declare(strict_types=1);

namespace Jose\Component\Core\Util;

use InvalidArgumentException;
use Jose\Component\Core\JWK;
use function in_array;
use function is_array;
use function is_string;

/**
 * @internal
 */
final class KeyChecker
{
    public static function checkKeyUsage(JWK $key, string $usage): void
    {
        if ($key->has('use')) {
            self::checkUsage($key, $usage);
        }
        if ($key->has('key_ops')) {
            self::checkOperation($key, $usage);
        }
    }

    public static function checkKeyAlgorithm(JWK $key, string $algorithm): void
    {
        if (! $key->has('alg')) {
            return;
        }
        $alg = $key->get('alg');
        if (! is_string($alg)) {
            throw new InvalidArgumentException('Invalid algorithm.');
        }
        if ($alg !== $algorithm) {
            throw new InvalidArgumentException(sprintf('Key is only allowed for algorithm "%s".', $alg));
        }
    }

    private static function checkOperation(JWK $key, string $usage): void
    {
        $ops = $key->get('key_ops');
        if (! is_array($ops)) {
            throw new InvalidArgumentException('Invalid key parameter "key_ops". Should be a list of key operations');
        }

        switch ($usage) {
            case 'verification':
                if (! in_array('verify', $ops, true)) {
                    throw new InvalidArgumentException('Key cannot be used to verify a signature');
                }

                break;

            case 'signature':
                if (! in_array('sign', $ops, true)) {
                    throw new InvalidArgumentException('Key cannot be used to sign');
                }

                break;

            case 'encryption':
                if (! in_array('encrypt', $ops, true) && ! in_array('wrapKey', $ops, true) && ! in_array(
                    'deriveKey',
                    $ops,
                    true
                )) {
                    throw new InvalidArgumentException('Key cannot be used to encrypt');
                }

                break;

            case 'decryption':
                if (! in_array('decrypt', $ops, true) && ! in_array('unwrapKey', $ops, true) && ! in_array(
                    'deriveBits',
                    $ops,
                    true
                )) {
                    throw new InvalidArgumentException('Key cannot be used to decrypt');
                }

                break;

            default:
                throw new InvalidArgumentException('Unsupported key usage.');
        }
    }

    private static function checkUsage(JWK $key, string $usage): void
    {
        $use = $key->get('use');

        switch ($usage) {
            case 'verification':
            case 'signature':
                if ($use !== 'sig') {
                    throw new InvalidArgumentException('Key cannot be used to sign or verify a signature.');
                }

                break;

            case 'encryption':
            case 'decryption':
                if ($use !== 'enc') {
                    throw new InvalidArgumentException('Key cannot be used to encrypt or decrypt.');
                }

                break;

            default:
                throw new InvalidArgumentException('Unsupported key usage.');
        }
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----MTc3NDE4NDc2NTExNDIyNSA3OTY1MjQ5ODIxOTYyNTI4IDY2NjM5ODY2OTUwNzIyODc=