|
1
|
|
|
<?php namespace Limoncello\Application\Packages\Csrf; |
|
2
|
|
|
|
|
3
|
|
|
/** |
|
4
|
|
|
* Copyright 2015-2018 [email protected] |
|
5
|
|
|
* |
|
6
|
|
|
* Licensed under the Apache License, Version 2.0 (the "License"); |
|
7
|
|
|
* you may not use this file except in compliance with the License. |
|
8
|
|
|
* You may obtain a copy of the License at |
|
9
|
|
|
* |
|
10
|
|
|
* http://www.apache.org/licenses/LICENSE-2.0 |
|
11
|
|
|
* |
|
12
|
|
|
* Unless required by applicable law or agreed to in writing, software |
|
13
|
|
|
* distributed under the License is distributed on an "AS IS" BASIS, |
|
14
|
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
|
15
|
|
|
* See the License for the specific language governing permissions and |
|
16
|
|
|
* limitations under the License. |
|
17
|
|
|
*/ |
|
18
|
|
|
|
|
19
|
|
|
use Limoncello\Contracts\Settings\SettingsInterface; |
|
20
|
|
|
use Limoncello\Core\Reflection\CheckCallableTrait; |
|
21
|
|
|
use Psr\Container\ContainerInterface; |
|
22
|
|
|
use Psr\Http\Message\ResponseInterface; |
|
23
|
|
|
use Psr\Http\Message\ServerRequestInterface; |
|
24
|
|
|
|
|
25
|
|
|
/** |
|
26
|
|
|
* @package Limoncello\Application |
|
27
|
|
|
*/ |
|
28
|
|
|
class CsrfSettings implements SettingsInterface |
|
29
|
|
|
{ |
|
30
|
|
|
use CheckCallableTrait; |
|
31
|
|
|
|
|
32
|
|
|
/** @var string Default form field for storing CSRF value */ |
|
33
|
|
|
public const DEFAULT_HTTP_REQUEST_CSRF_TOKEN_KEY = '_token'; |
|
34
|
|
|
|
|
35
|
|
|
/** @var int Settings key */ |
|
36
|
|
|
public const HTTP_METHODS_TO_CHECK = 0; |
|
37
|
|
|
|
|
38
|
|
|
/** @var int Settings key */ |
|
39
|
|
|
public const HTTP_REQUEST_CSRF_TOKEN_KEY = self::HTTP_METHODS_TO_CHECK + 1; |
|
40
|
|
|
|
|
41
|
|
|
/** @var int Settings key */ |
|
42
|
|
|
public const TOKEN_STORAGE_KEY_IN_SESSION = self::HTTP_REQUEST_CSRF_TOKEN_KEY + 1; |
|
43
|
|
|
|
|
44
|
|
|
/** @var int Settings key */ |
|
45
|
|
|
public const MAX_TOKENS = self::TOKEN_STORAGE_KEY_IN_SESSION + 1; |
|
46
|
|
|
|
|
47
|
|
|
/** @var int Settings key */ |
|
48
|
|
|
public const MAX_TOKENS_THRESHOLD = self::MAX_TOKENS + 1; |
|
49
|
|
|
|
|
50
|
|
|
/** @var int Settings key */ |
|
51
|
|
|
public const CREATE_ERROR_RESPONSE_METHOD = self::MAX_TOKENS_THRESHOLD + 1; |
|
52
|
|
|
|
|
53
|
|
|
/** @var int Settings key */ |
|
54
|
|
|
public const INTERNAL_HTTP_METHODS_TO_CHECK_AS_UC_KEYS = self::CREATE_ERROR_RESPONSE_METHOD + 1; |
|
55
|
|
|
|
|
56
|
|
|
/** @var int Settings key */ |
|
57
|
|
|
public const KEY_LAST = self::INTERNAL_HTTP_METHODS_TO_CHECK_AS_UC_KEYS + 1; |
|
58
|
|
|
|
|
59
|
|
|
/** |
|
60
|
|
|
* @inheritdoc |
|
61
|
|
|
*/ |
|
62
|
5 |
|
final public function get(array $appConfig): array |
|
63
|
|
|
{ |
|
64
|
5 |
|
$settings = $this->getSettings(); |
|
65
|
|
|
|
|
66
|
|
|
// check and transform HTTP methods |
|
67
|
5 |
|
$methods = $settings[static::HTTP_METHODS_TO_CHECK] ?? []; |
|
68
|
5 |
|
assert(empty($methods) === false); |
|
69
|
5 |
|
$upperCaseMethods = []; |
|
70
|
5 |
|
foreach ($methods as $method) { |
|
71
|
5 |
|
assert(is_string($method) === true && empty($method) === false); |
|
72
|
5 |
|
$upperCaseMethods[strtoupper($method)] = true; |
|
73
|
|
|
} |
|
74
|
5 |
|
$settings[static::INTERNAL_HTTP_METHODS_TO_CHECK_AS_UC_KEYS] = $upperCaseMethods; |
|
75
|
5 |
|
unset($settings[static::HTTP_METHODS_TO_CHECK]); |
|
76
|
|
|
|
|
77
|
|
|
// check token key |
|
78
|
5 |
|
$tokenKey = $settings[static::HTTP_REQUEST_CSRF_TOKEN_KEY]; |
|
79
|
5 |
|
assert(is_string($tokenKey) === true && empty($tokenKey) === false); |
|
80
|
|
|
|
|
81
|
|
|
// check storage key |
|
82
|
5 |
|
$storageKey = $settings[static::TOKEN_STORAGE_KEY_IN_SESSION]; |
|
83
|
5 |
|
assert(is_string($storageKey) === true && empty($storageKey) === false); |
|
84
|
|
|
|
|
85
|
|
|
// check max tokens |
|
86
|
5 |
|
$maxTokens = $settings[static::MAX_TOKENS]; |
|
87
|
5 |
|
assert(is_null($maxTokens) === true || (is_int($maxTokens) === true && $maxTokens > 0)); |
|
88
|
|
|
|
|
89
|
|
|
// check max tokens |
|
90
|
5 |
|
$maxTokensThreshold = $settings[static::MAX_TOKENS]; |
|
91
|
5 |
|
assert(is_int($maxTokensThreshold) === true && $maxTokensThreshold >= 0); |
|
92
|
|
|
|
|
93
|
5 |
|
$errorResponseMethod = $settings[static::CREATE_ERROR_RESPONSE_METHOD] ?? null; |
|
94
|
5 |
|
$expectedArgs = [ContainerInterface::class, ServerRequestInterface::class]; |
|
95
|
5 |
|
$expectedRet = ResponseInterface::class; |
|
96
|
5 |
|
assert( |
|
97
|
5 |
|
$this->checkPublicStaticCallable($errorResponseMethod, $expectedArgs, $expectedRet) === true, |
|
98
|
|
|
'CSRF error response method should have signature ' . |
|
99
|
5 |
|
'(ContainerInterface, ServerRequestInterface): ResponseInterface.' |
|
100
|
|
|
); |
|
101
|
|
|
|
|
102
|
5 |
|
return $settings; |
|
103
|
|
|
} |
|
104
|
|
|
|
|
105
|
|
|
/** |
|
106
|
|
|
* @return array |
|
107
|
|
|
*/ |
|
108
|
5 |
|
protected function getSettings(): array |
|
109
|
|
|
{ |
|
110
|
|
|
// defaults |
|
111
|
5 |
|
$errorResponseMethod = [CsrfMiddleware::class, CsrfMiddleware::DEFAULT_ERROR_RESPONSE_METHOD]; |
|
112
|
|
|
|
|
113
|
|
|
return [ |
|
114
|
5 |
|
static::HTTP_METHODS_TO_CHECK => ['POST', 'PUT', 'DELETE', 'PATCH'], |
|
115
|
5 |
|
static::HTTP_REQUEST_CSRF_TOKEN_KEY => static::DEFAULT_HTTP_REQUEST_CSRF_TOKEN_KEY, |
|
116
|
5 |
|
static::TOKEN_STORAGE_KEY_IN_SESSION => 'csrf_tokens', |
|
117
|
5 |
|
static::MAX_TOKENS => 20, |
|
118
|
5 |
|
static::MAX_TOKENS_THRESHOLD => 5, |
|
119
|
5 |
|
static::CREATE_ERROR_RESPONSE_METHOD => $errorResponseMethod, |
|
120
|
|
|
]; |
|
121
|
|
|
} |
|
122
|
|
|
} |
|
123
|
|
|
|
limoncello-php-dist /
application
