defender-security / vendor / spomky-labs / cbor-php / src / Decoder.php

Decoder.php in Defender Security – Malware Scanner, Login Security & Firewall 5.7.2, at vendor/spomky-labs/cbor-php/src/Decoder.php

269 lines 9.5 KB

Raw Download Zip

1	<?php
2
3	declare(strict_types=1);
4
5	/*
6	* The MIT License (MIT)
7	*
8	* Copyright (c) 2018-2020 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 CBOR;
15
16	use CBOR\OtherObject\BreakObject;
17	use CBOR\OtherObject\DoublePrecisionFloatObject;
18	use CBOR\OtherObject\FalseObject;
19	use CBOR\OtherObject\HalfPrecisionFloatObject;
20	use CBOR\OtherObject\NullObject;
21	use CBOR\OtherObject\OtherObjectManager;
22	use CBOR\OtherObject\OtherObjectManagerInterface;
23	use CBOR\OtherObject\SimpleObject;
24	use CBOR\OtherObject\SinglePrecisionFloatObject;
25	use CBOR\OtherObject\TrueObject;
26	use CBOR\OtherObject\UndefinedObject;
27	use CBOR\Tag\Base16EncodingTag;
28	use CBOR\Tag\Base64EncodingTag;
29	use CBOR\Tag\Base64Tag;
30	use CBOR\Tag\Base64UrlEncodingTag;
31	use CBOR\Tag\Base64UrlTag;
32	use CBOR\Tag\BigFloatTag;
33	use CBOR\Tag\CBOREncodingTag;
34	use CBOR\Tag\CBORTag;
35	use CBOR\Tag\DatetimeTag;
36	use CBOR\Tag\DecimalFractionTag;
37	use CBOR\Tag\MimeTag;
38	use CBOR\Tag\NegativeBigIntegerTag;
39	use CBOR\Tag\TagManager;
40	use CBOR\Tag\TagManagerInterface;
41	use CBOR\Tag\TimestampTag;
42	use CBOR\Tag\UnsignedBigIntegerTag;
43	use CBOR\Tag\UriTag;
44	use InvalidArgumentException;
45	use function ord;
46	use RuntimeException;
47	use const STR_PAD_LEFT;
48
49	final class Decoder implements DecoderInterface
50	{
51	/**
52	* @var Tag\TagManagerInterface
53	*/
54	private $tagManager;
55
56	/**
57	* @var OtherObject\OtherObjectManagerInterface
58	*/
59	private $otherObjectManager;
60
61	public function __construct(
62	?TagManagerInterface $tagManager = null,
63	?OtherObjectManagerInterface $otherTypeManager = null
64	) {
65	$this->tagManager = $tagManager ?? $this->generateTagManager();
66	$this->otherObjectManager = $otherTypeManager ?? $this->generateOtherObjectManager();
67	}
68
69	public static function create(
70	?TagManagerInterface $tagManager = null,
71	?OtherObjectManagerInterface $otherObjectManager = null
72	): self {
73	return new self($tagManager, $otherObjectManager);
74	}
75
76	public function withTagManager(TagManagerInterface $tagManager): self
77	{
78	$this->tagManager = $tagManager;
79
80	return $this;
81	}
82
83	public function withOtherObjectManager(OtherObjectManagerInterface $otherObjectManager): self
84	{
85	$this->otherObjectManager = $otherObjectManager;
86
87	return $this;
88	}
89
90	public function decode(Stream $stream): CBORObject
91	{
92	return $this->process($stream, false);
93	}
94
95	private function process(Stream $stream, bool $breakable): CBORObject
96	{
97	$ib = ord($stream->read(1));
98	$mt = $ib >> 5;
99	$ai = $ib & 0b00011111;
100	$val = null;
101	switch ($ai) {
102	case CBORObject::LENGTH_1_BYTE: //24
103	case CBORObject::LENGTH_2_BYTES: //25
104	case CBORObject::LENGTH_4_BYTES: //26
105	case CBORObject::LENGTH_8_BYTES: //27
106	$val = $stream->read(2 ** ($ai & 0b00000111));
107	break;
108	case CBORObject::FUTURE_USE_1: //28
109	case CBORObject::FUTURE_USE_2: //29
110	case CBORObject::FUTURE_USE_3: //30
111	throw new InvalidArgumentException(sprintf(
112	'Cannot parse the data. Found invalid Additional Information "%s" (%d).',
113	str_pad(decbin($ai), 8, '0', STR_PAD_LEFT),
114	$ai
115	));
116	case CBORObject::LENGTH_INDEFINITE: //31
117	return $this->processInfinite($stream, $mt, $breakable);
118	}
119
120	return $this->processFinite($stream, $mt, $ai, $val);
121	}
122
123	private function processFinite(Stream $stream, int $mt, int $ai, ?string $val): CBORObject
124	{
125	switch ($mt) {
126	case CBORObject::MAJOR_TYPE_UNSIGNED_INTEGER: //0
127	return UnsignedIntegerObject::createObjectForValue($ai, $val);
128	case CBORObject::MAJOR_TYPE_NEGATIVE_INTEGER: //1
129	return NegativeIntegerObject::createObjectForValue($ai, $val);
130	case CBORObject::MAJOR_TYPE_BYTE_STRING: //2
131	$length = $val === null ? $ai : Utils::binToInt($val);
132
133	return ByteStringObject::create($stream->read($length));
134	case CBORObject::MAJOR_TYPE_TEXT_STRING: //3
135	$length = $val === null ? $ai : Utils::binToInt($val);
136
137	return TextStringObject::create($stream->read($length));
138	case CBORObject::MAJOR_TYPE_LIST: //4
139	$object = ListObject::create();
140	$nbItems = $val === null ? $ai : Utils::binToInt($val);
141	for ($i = 0; $i < $nbItems; ++$i) {
142	$object->add($this->process($stream, false));
143	}
144
145	return $object;
146	case CBORObject::MAJOR_TYPE_MAP: //5
147	$object = MapObject::create();
148	$nbItems = $val === null ? $ai : Utils::binToInt($val);
149	for ($i = 0; $i < $nbItems; ++$i) {
150	$object->add($this->process($stream, false), $this->process($stream, false));
151	}
152
153	return $object;
154	case CBORObject::MAJOR_TYPE_TAG: //6
155	return $this->tagManager->createObjectForValue($ai, $val, $this->process($stream, false));
156	case CBORObject::MAJOR_TYPE_OTHER_TYPE: //7
157	return $this->otherObjectManager->createObjectForValue($ai, $val);
158	default:
159	throw new RuntimeException(sprintf(
160	'Unsupported major type "%s" (%d).',
161	str_pad(decbin($mt), 5, '0', STR_PAD_LEFT),
162	$mt
163	)); // Should never append
164	}
165	}
166
167	private function processInfinite(Stream $stream, int $mt, bool $breakable): CBORObject
168	{
169	switch ($mt) {
170	case CBORObject::MAJOR_TYPE_BYTE_STRING: //2
171	$object = IndefiniteLengthByteStringObject::create();
172	while (! ($it = $this->process($stream, true)) instanceof BreakObject) {
173	if (! $it instanceof ByteStringObject) {
174	throw new RuntimeException(
175	'Unable to parse the data. Infinite Byte String object can only get Byte String objects.'
176	);
177	}
178	$object->add($it);
179	}
180
181	return $object;
182	case CBORObject::MAJOR_TYPE_TEXT_STRING: //3
183	$object = IndefiniteLengthTextStringObject::create();
184	while (! ($it = $this->process($stream, true)) instanceof BreakObject) {
185	if (! $it instanceof TextStringObject) {
186	throw new RuntimeException(
187	'Unable to parse the data. Infinite Text String object can only get Text String objects.'
188	);
189	}
190	$object->add($it);
191	}
192
193	return $object;
194	case CBORObject::MAJOR_TYPE_LIST: //4
195	$object = IndefiniteLengthListObject::create();
196	$it = $this->process($stream, true);
197	while (! $it instanceof BreakObject) {
198	$object->add($it);
199	$it = $this->process($stream, true);
200	}
201
202	return $object;
203	case CBORObject::MAJOR_TYPE_MAP: //5
204	$object = IndefiniteLengthMapObject::create();
205	while (! ($it = $this->process($stream, true)) instanceof BreakObject) {
206	$object->add($it, $this->process($stream, false));
207	}
208
209	return $object;
210	case CBORObject::MAJOR_TYPE_OTHER_TYPE: //7
211	if (! $breakable) {
212	throw new InvalidArgumentException('Cannot parse the data. No enclosing indefinite.');
213	}
214
215	return BreakObject::create();
216	case CBORObject::MAJOR_TYPE_UNSIGNED_INTEGER: //0
217	case CBORObject::MAJOR_TYPE_NEGATIVE_INTEGER: //1
218	case CBORObject::MAJOR_TYPE_TAG: //6
219	default:
220	throw new InvalidArgumentException(sprintf(
221	'Cannot parse the data. Found infinite length for Major Type "%s" (%d).',
222	str_pad(decbin($mt), 5, '0', STR_PAD_LEFT),
223	$mt
224	));
225	}
226	}
227
228	private function generateTagManager(): TagManagerInterface
229	{
230	return TagManager::create()
231	->add(DatetimeTag::class)
232	->add(TimestampTag::class)
233
234	->add(UnsignedBigIntegerTag::class)
235	->add(NegativeBigIntegerTag::class)
236
237	->add(DecimalFractionTag::class)
238	->add(BigFloatTag::class)
239
240	->add(Base64UrlEncodingTag::class)
241	->add(Base64EncodingTag::class)
242	->add(Base16EncodingTag::class)
243	->add(CBOREncodingTag::class)
244
245	->add(UriTag::class)
246	->add(Base64UrlTag::class)
247	->add(Base64Tag::class)
248	->add(MimeTag::class)
249
250	->add(CBORTag::class)
251	;
252	}
253
254	private function generateOtherObjectManager(): OtherObjectManagerInterface
255	{
256	return OtherObjectManager::create()
257	->add(BreakObject::class)
258	->add(SimpleObject::class)
259	->add(FalseObject::class)
260	->add(TrueObject::class)
261	->add(NullObject::class)
262	->add(UndefinedObject::class)
263	->add(HalfPrecisionFloatObject::class)
264	->add(SinglePrecisionFloatObject::class)
265	->add(DoublePrecisionFloatObject::class)
266	;
267	}
268	}
269