Jose\Component\Core\JWK

Complexity

Total Complexity

13

Size/Duplication

Total Lines	128
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	1

Importance

Changes

0

9 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	4	1
A	create()	0	8	2
A	createFromJson()	0	9	2
A	jsonSerialize()	0	4	1
A	get()	0	8	2
A	has()	0	4	1
A	all()	0	4	1
A	thumbprint()	0	12	2
A	toPublic()	0	6	1

<?php

declare(strict_types=1);

/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014-2017 Spomky-Labs
 *
 * This software may be modified and distributed under the terms
 * of the MIT license.  See the LICENSE file for details.
 */

namespace Jose\Component\Core;

use Base64Url\Base64Url;

/**
 * Class JWK.
 */
final class JWK implements \JsonSerializable
{
    /**
     * @var array
     */
    private $values = [];

    /**
     * JWK constructor.
     *
     * @param array $values
     */
    private function __construct(array $values)
    {
        $this->values = $values;
    }

    /**
     * @param array $values
     *
     * @return JWK
     */
    public static function create(array $values): self
    {
        if (!array_key_exists('kty', $values)) {
            throw new \InvalidArgumentException('The parameter "kty" is mandatory.');
        }

        return new self($values);
    }

    /**
     * @param string $json
     *
     * @return JWK
     */
    public static function createFromJson(string $json): self
    {
        $data = json_decode($json, true);
        if (!is_array($data)) {
            throw new \InvalidArgumentException('Invalid argument.');
        }

        return self::create($data);
    }

    /**
     * {@inheritdoc}
     */
    public function jsonSerialize()
    {
        return $this->values;
    }

    /**
     * Get the value with a specific key.
     *
     * @param string $key The key
     *
     * @throws \InvalidArgumentException
     *
     * @return mixed|null The value
     */
    public function get(string $key)
    {
        if (!$this->has($key)) {
            throw new \InvalidArgumentException(sprintf('The value identified by "%s" does not exist.', $key));
        }

        return $this->values[$key];
    }

    /**
     * Returns true if the JWK has the value identified by.
     *
     * @param string $key The key
     *
     * @return bool
     */
    public function has(string $key): bool
    {
        return array_key_exists($key, $this->values);
    }

    /**
     * Get all values stored in the JWK object.
     *
     * @return array Values of the JWK object
     */
    public function all(): array
    {
        return $this->values;
    }

    /**
     * Returns the thumbprint of the key.
     *
     * @see https://tools.ietf.org/html/rfc7638
     *
     * @param string $hash_algorithm
     *
     * @throws \InvalidArgumentException
     *
     * @return string
     */
    public function thumbprint(string $hash_algorithm): string
    {
        if (!in_array($hash_algorithm, hash_algos())) {
            throw new \InvalidArgumentException(sprintf('The hash algorithm "%s" is not supported.', $hash_algorithm));
        }

        $values = array_intersect_key($this->values, array_flip(['kty', 'n', 'e', 'crv', 'x', 'y', 'k']));
        ksort($values);
        $input = json_encode($values, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);

        return Base64Url::encode(hash($hash_algorithm, $input, true));
    }

    /**
     * @return JWK
     */
    public function toPublic(): self
    {
        $values = array_diff_key($this->values, array_flip(['p', 'd', 'q', 'dp', 'dq', 'qi']));

        return new self($values);
    }
}