Failed Conditions
Push — master ( 21ad2b...d4e49e )
by Florent
02:19
created

checkDuplicatedHeaderParameters()   A

Complexity

Conditions 2
Paths 2

Size

Total Lines 7
Code Lines 4

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
dl 0
loc 7
rs 9.4285
c 0
b 0
f 0
cc 2
eloc 4
nc 2
nop 2
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\Checker;
15
16
use Jose\Component\Core\JWT;
17
18
/**
19
 * Class HeaderCheckerManager.
20
 */
21
final class HeaderCheckerManager
22
{
23
    /**
24
     * @var HeaderChecker[]
25
     */
26
    private $checkers = [];
27
28
    /**
29
     * @var TokenTypeSupport[]
30
     */
31
    private $tokenTypes = [];
32
33
    /**
34
     * HeaderCheckerManager constructor.
35
     *
36
     * @param HeaderChecker[]    $checkers
37
     * @param TokenTypeSupport[] $tokenTypes
38
     */
39
    private function __construct(array $checkers, array $tokenTypes)
40
    {
41
        foreach ($checkers as $checker) {
42
            $this->add($checker);
43
        }
44
        foreach ($tokenTypes as $tokenType) {
45
            $this->addTokenTypeSupport($tokenType);
46
        }
47
    }
48
49
    /**
50
     * @param HeaderChecker[]    $checkers
51
     * @param TokenTypeSupport[] $tokenTypes
52
     *
53
     * @return HeaderCheckerManager
54
     */
55
    public static function create(array $checkers, array $tokenTypes): self
56
    {
57
        return new self($checkers, $tokenTypes);
58
    }
59
60
    /**
61
     * @return HeaderChecker[]
62
     */
63
    public function getCheckers(): array
64
    {
65
        return $this->checkers;
66
    }
67
68
    /**
69
     * @param TokenTypeSupport $tokenType
70
     *
71
     * @return HeaderCheckerManager
72
     */
73
    private function addTokenTypeSupport(TokenTypeSupport $tokenType): self
74
    {
75
        $this->tokenTypes[] = $tokenType;
76
77
        return $this;
78
    }
79
80
    /**
81
     * @param HeaderChecker $checker
82
     *
83
     * @return HeaderCheckerManager
84
     */
85
    private function add(HeaderChecker $checker): self
86
    {
87
        $header = $checker->supportedHeader();
88
        $this->checkers[$header] = $checker;
89
90
        return $this;
91
    }
92
93
    /**
94
     * @param JWT $jwt
95
     * @param int $component
96
     */
97
    public function check(JWT $jwt, int $component)
98
    {
99
        foreach ($this->tokenTypes as $tokenType) {
100
            if ($tokenType->supports($jwt)) {
101
                $protected = [];
102
                $unprotected = [];
103
                $tokenType->retrieveTokenHeaders($jwt, $component, $protected, $unprotected);
104
                $this->checkDuplicatedHeaderParameters($protected, $unprotected);
105
                $this->checkHeaders($protected, $unprotected);
106
107
                return;
108
            }
109
        }
110
111
        throw new \InvalidArgumentException('Unsupported token type.');
112
    }
113
114
    /**
115
     * @param array $header1
116
     * @param array $header2
117
     */
118
    private function checkDuplicatedHeaderParameters(array $header1, array $header2)
119
    {
120
        $inter = array_intersect_key($header1, $header2);
121
        if (!empty($inter)) {
122
            throw new \InvalidArgumentException(sprintf('The header contains duplicated entries: %s.', implode(', ', array_keys($inter))));
123
        }
124
    }
125
126
    /**
127
     * @param array $protected
128
     * @param array $headers
129
     */
130
    private function checkHeaders(array $protected, array $headers)
131
    {
132
        $checkedHeaders = [];
133
        foreach ($this->checkers as $header => $checker) {
134
            if ($checker->protectedHeaderOnly()) {
135
                if (array_key_exists($header, $protected)) {
136
                    $checker->checkHeader($protected[$header]);
137
                    $checkedHeaders[] = $header;
138
                } elseif (array_key_exists($header, $headers)) {
139
                    throw new \InvalidArgumentException(sprintf('The header "%s" must be protected.', $header));
140
                }
141
            } else {
142
                if (array_key_exists($header, $protected)) {
143
                    $checker->checkHeader($protected[$header]);
144
                    $checkedHeaders[] = $header;
145
                } elseif (array_key_exists($header, $headers)) {
146
                    $checker->checkHeader($headers[$header]);
147
                    $checkedHeaders[] = $header;
148
                }
149
            }
150
        }
151
        $this->checkCriticalHeader($protected, $headers, $checkedHeaders);
152
    }
153
154
    /**
155
     * @param array $protected
156
     * @param array $headers
157
     * @param array $checkedHeaders
158
     */
159
    private function checkCriticalHeader(array $protected, array $headers, array $checkedHeaders)
160
    {
161
        if (array_key_exists('crit', $protected)) {
162
            if (!is_array($protected['crit'])) {
163
                throw new \InvalidArgumentException('The header "crit" mus be a list of header parameters.');
164
            }
165
            $diff = array_diff($protected['crit'], $checkedHeaders);
166
            if (!empty($diff)) {
167
                throw new \InvalidArgumentException(sprintf('One or more headers are marked as critical, but they are missing or have not been checked: %s.', implode(', ', array_values($diff))));
168
            }
169
        } elseif (array_key_exists('crit', $headers)) {
170
            throw new \InvalidArgumentException('The header parameter "crit" must be protected.');
171
        }
172
    }
173
}
174