uRE5DgTc

1<?php
2
3namespace Utils;
4
5use \Tmilos\JoseJwt;
6
7class Jwe
8{
9    /**
10     * @var string Secret key to be used for JWE
11     */
12    private $secretKey;
13
14    /**
15     * @param string $secretKey Secret key to be used for JWE
16     */
17    public function __construct(string $secretKey)
18    {
19        $this->secretKey = $secretKey;
20    }
21
22    /**
23     * @return Jwe Instance with key that is used on Test server
24     */
25    public static function getTestInstance(): Jwe
26    {
27        return new static(file_get_contents(APPPATH . '/config/jwe.test.secret'));
28    }
29
30    /**
31     * @return Jwe Instance with key that is used for Production server
32     */
33    public static function getProductionInstance(): Jwe
34    {
35        return new static(file_get_contents(APPPATH . '/config/jwe.secret'));
36    }
37
38    /**
39     * @param string $payload
40     *
41     * @return string
42     *
43     * @throws JoseJwt\Error\JoseJwtException
44     */
45    public function encrypt(string $payload): string
46    {
47        $factory = new JoseJwt\Context\DefaultContextFactory();
48
49        return JoseJwt\Jwe::encode(
50            $factory->get(),
51            $payload,
52            $this->secretKey,
53            JoseJwt\Jwe\JweAlgorithm::DIR,
54            JoseJwt\Jwe\JweEncryption::A256CBC_HS512
55        );
56    }
57
58    /**
59     * @param string $token Jwe token
60     *
61     * @return string
62     *
63     * @throws JoseJwt\Error\JoseJwtException
64     */
65    public function decrypt(string $token): string
66    {
67        $factory = new JoseJwt\Context\DefaultContextFactory();
68
69        return JoseJwt\Jwe::decode(
70            $factory->get(),
71            $token,
72            $this->secretKey
73        );
74    }
75}