KeyChecker::checkOperation() - Code Metrics - Inspection of "Assertion library completely removed" - Spomky-Labs/jose - Measure and Improve Code Quality continuously with Scrutinizer

Failed Conditions

Push — v7 ( e9e51b...d9c0af )

by Florent

created 2017-08-11 12:25 UTC

KeyChecker::checkOperation() C

↳ Parent: KeyChecker

Complexity

Conditions	12
Paths	18

Size

Total Lines	35
Code Lines	23

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	35
rs	5.1612
c	0
b	0
f	0
cc	12
eloc	23
nc	18
nop	2

How to fix Complexity

<?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;

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

        return true;
    }

    /**
     * @param JWK    $key
     * @param string $usage
     *
     * @return bool
     */
    private static function checkOperation(JWK $key, string $usage): bool
    {
        $ops = $key->get('key_ops');
        if (!is_array($ops)) {
            $ops = [$ops];
        }
        switch ($usage) {
            case 'verification':
                if (!in_array('verify', $ops)) {
                    throw new \InvalidArgumentException('Key cannot be used to verify a signature');
                }

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

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

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

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

    /**
     * @param JWK    $key
     * @param string $usage
     *
     * @return bool
     */
    private static function checkUsage(JWK $key, string $usage): bool
    {
        $use = $key->get('use');
        switch ($usage) {
            case 'verification':
            case 'signature':
                if ('sig' !== $use) {
                    throw new \InvalidArgumentException('Key cannot be used to sign or verify a signature.');
                }

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

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

    /**
     * @param JWK    $key
     * @param string $algorithm
     */
    public static function checkKeyAlgorithm(JWK $key, string $algorithm)
    {
        if (!$key->has('alg')) {
            return;
        }

        if ($key->get('alg') !== $algorithm) {
            throw new \InvalidArgumentException(sprintf('Key is only allowed for algorithm "%s".', $key->get('alg')));
        }
    }
}


1			<?php
2
3			declare(strict_types=1);
4
5			/*
6			* The MIT License (MIT)
7			*
8			* Copyright (c) 2014-2017 Spomky-Labs
9			*
10			* This software may be modified and distributed under the terms
11			* of the MIT license. See the LICENSE file for details.
12			*/
13
14			namespace Jose\Component\Core;
15
16			final class KeyChecker
17			{
18			/**
19			* @param JWK $key
20			* @param string $usage
21			*
22			* @throws \InvalidArgumentException
23			*
24			* @return bool
25			*/
26			public static function checkKeyUsage(JWK $key, string $usage): bool
27			{
28			if ($key->has('use')) {
29			return self::checkUsage($key, $usage);
30			}
31			if ($key->has('key_ops')) {
32			return self::checkOperation($key, $usage);
33			}
34
35			return true;
36			}
37
38			/**
39			* @param JWK $key
40			* @param string $usage
41			*
42			* @return bool
43			*/
44			private static function checkOperation(JWK $key, string $usage): bool
45			{
46			$ops = $key->get('key_ops');
47			if (!is_array($ops)) {
48			$ops = [$ops];
49			}
50			switch ($usage) {
51			case 'verification':
52			if (!in_array('verify', $ops)) {
53			throw new \InvalidArgumentException('Key cannot be used to verify a signature');
54			}
55
56			return true;
57			case 'signature':
58			if (!in_array('sign', $ops)) {
59			throw new \InvalidArgumentException('Key cannot be used to sign');
60			}
61
62			return true;
63			case 'encryption':
64			if (!in_array('encrypt', $ops) && !in_array('wrapKey', $ops)) {
65			throw new \InvalidArgumentException('Key cannot be used to encrypt');
66			}
67
68			return true;
69			case 'decryption':
70			if (!in_array('decrypt', $ops) && !in_array('unwrapKey', $ops)) {
71			throw new \InvalidArgumentException('Key cannot be used to decrypt');
72			}
73
74			return true;
75			default:
76			throw new \InvalidArgumentException('Unsupported key usage.');
77			}
78			}
79
80			/**
81			* @param JWK $key
82			* @param string $usage
83			*
84			* @return bool
85			*/
86			private static function checkUsage(JWK $key, string $usage): bool
87			{
88			$use = $key->get('use');
89			switch ($usage) {
90			case 'verification':
91			case 'signature':
92			if ('sig' !== $use) {
93			throw new \InvalidArgumentException('Key cannot be used to sign or verify a signature.');
94			}
95
96			return true;
97			case 'encryption':
98			case 'decryption':
99			if ('enc' !== $use) {
100			throw new \InvalidArgumentException('Key cannot be used to encrypt or decrypt.');
101			}
102
103			return true;
104			default:
105			throw new \InvalidArgumentException('Unsupported key usage.');
106			}
107			}
108
109			/**
110			* @param JWK $key
111			* @param string $algorithm
112			*/
113			public static function checkKeyAlgorithm(JWK $key, string $algorithm)
114			{
115			if (!$key->has('alg')) {
116			return;
117			}
118
119			if ($key->get('alg') !== $algorithm) {
120			throw new \InvalidArgumentException(sprintf('Key is only allowed for algorithm "%s".', $key->get('alg')));
121			}
122			}
123			}
124

Spomky-Labs / jose

Push — v7 ( e9e51b...d9c0af )

KeyChecker::checkOperation() C

Complexity

Size

Duplication

Importance

How to fix Complexity

Long Method

Duplication Side-by-Side

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