Der::peek() - Code Metrics - Inspection of "all: collection of typo fixes" - grommunio/grommunio-web - Measure and Improve Code Quality continuously with Scrutinizer

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Push — master ( 42b683...7c1a7f )

unknown

created 2025-03-21 18:03 UTC

Der::peek() A

↳ Parent: Der

Complexity

Conditions	4
Paths	6

Size

Total Lines	16
Code Lines	9

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	4
eloc	9
nc	6
nop	1
dl	0
loc	16
rs	9.9666
c	0
b	0
f	0

<?php

namespace WAYF;

require_once 'Oids.php';

class Der extends Oids {
	protected $tag;
	protected $len;
	protected $value;
	protected $class;
	protected $constructed;
	protected $buffer;
	protected $stack = [];
	protected $i;
	private $ignoredextensions = [

		'netscape-cert-type' => 1,
	];
	private $id;

	protected function init($der) {
		$this->buffer = $der;
		$this->i = 0;
		$this->id = uniqid();
	}

	protected function dump($note = '') {
		$z = strlen((string) $this->buffer) - $this->i;
		print_r("{$note}\n");
		print_r("len: {$z}\n");
		print_r(chunk_split(bin2hex(substr((string) $this->buffer, $this->i)), 2, ':'));
		echo "\n";
	}

	protected function pr($note = '') {
		$savei = $this->i;
		$byte = ord($this->buffer[$this->i++]);
		$tag = $byte & 0x1F;
		$class = $byte & 0xC0;
		$constructed = $byte & 0x20;

		$len = $this->vallen();
		$this->i = $savei;
		print_r("{$note}\n");
		print_r("i  : {$this->i}\n");
		print_r("len: {$len}\n");
		print_r("class:   {$class}\n");
		print_r("tag  :   {$tag}\n");
		print_r(chunk_split(bin2hex(substr((string) $this->buffer, $this->i, min(32, strlen((string) $this->buffer) - $this->i))) . "\n", 2, ':'));
		print_r("---\n");
	}

	private function tlv($expectedtag = null) {
		$byte = ord($this->buffer[$this->i++]);
		$this->tag = $byte & 0x1F;
		if ($expectedtag < 0) {
			$this->tag = $expectedtag = -$expectedtag;
		}
		if ($expectedtag && $expectedtag != $this->tag) {
			trigger_error("expected tag == {$expectedtag}, got {$this->tag} {$this->id}\n", E_USER_ERROR);
		}
		$this->class = $byte & 0xC0;
		$this->constructed = $byte & 0x20;
		$this->len = $this->vallen();
	}

	protected function next($expectedtag = null) {
		$this->tlv($expectedtag);
		if ($this->constructed) {
			return;
		}
		$value = substr((string) $this->buffer, $this->i, $this->len);
		if ($this->class == 0 || $this->class == 0x80) {
			if ($this->tag == 2 || $this->tag == 10) { # ints and enums
				$int = 0;
				foreach (str_split($value) as $byte) {
					$int = bcmul($int, '256', 0);
					$int = bcadd($int, ord($byte), 0);
				}
				$this->value = $int;
			}
			elseif ($this->tag == 1) { # boolean
				$this->value = ord($value) != 0;
			}
			elseif ($this->tag == 3) { # bit string
				$this->value = $value;
			}
			elseif ($this->tag == 5) { # null
				$this->value = null;
			}
			else {
				$this->value = $value;
			}
		}
		$this->i += $this->len;

		return $this->value;
	}

	protected function der($expectedtag = null, $pass = false) {
		$oldi = $this->i;
		$this->tlv($expectedtag);
		$i = $this->i;
		if (!$pass) {
			$this->i = $oldi;
		}
		else {
			$this->i += $this->len;
		}

		return substr((string) $this->buffer, $oldi, $this->len + $i - $oldi);
	}

	/*
	 * if provided with a tag and the tag is equal to the current tag
	 * peek considers it EXPLICIT, consumes it and return true
	 */
	protected function peek($tag = null) {
		$t = null;
		if ($this->i < end($this->stack)) {
			$t = ord($this->buffer[$this->i]) & 0x1F;
		}
		if ($tag !== null) {
			if ($t === $tag) {
				$this->next($tag);

				return true;
			}

			return false;
		}

		return $t;
	}

	protected function vallen() {
		$byte = ord($this->buffer[$this->i++]);
		$res = $len = $byte & 0x7F;
		if ($byte >= 0x80) {
			$res = 0;
			for ($c = 0; $c < $len; ++$c) {
				$res = $res * 256 + ord($this->buffer[$this->i++]);
			}
		}

		return $res;
	}

	protected function beginsequence($tag = 16) {
		$this->begin($tag);
	}

	protected function beginset($tag = 17) {
		$this->begin($tag);
	}

	protected function begin($tag) {
		$this->next($tag);
		array_push($this->stack, $this->i + $this->len);
	}

	protected function in() {
		return $this->i < end($this->stack);
	}

	protected function end() {
		$end = array_pop($this->stack);
		if ($end != $this->i) {
			trigger_error("sequence or set length does not match: {$end} != {$this->i}", E_USER_ERROR);
		}
	}

	protected function extensions() {
		$this->beginsequence();
		$extns = [];
		while ($this->in()) {
			$this->beginsequence();
			$extnID = $this->oid();
			$theext['critical'] = $this->peek(1);
			$theext['extnValue'] = $this->next(4);

			try {
				if (method_exists($this, $extnID)) {
					$theext['extnValue'] = call_user_func([$this, $extnID], $theext['extnValue']);

				}
				elseif (!empty($ignoredextensions['$extnID'])) {

					trigger_error("Unknown extension {$extnID}", E_USER_ERROR);
				}
				else {
					$theext['extnValue'] = chunk_split(bin2hex((string) $theext['extnValue']), 2, ':');
				}
			}
			catch (\Exception) {
				$theext['extnValue'] = chunk_split(bin2hex((string) $theext['extnValue']), 2, ':');
			}
			$this->end();
			$extns[$extnID] = $theext;
		}
		$this->end();

		return $extns;
	}

	protected function signatureAlgorithm() {
		$this->beginsequence();
		$salg = $this->oid();
		if ($this->in()) {
			$this->next(); # alg param - ignore for now
		}
		$this->end();

		return $salg;
	}

	protected function name($tag = null) {
		$this->beginsequence($tag);
		$res = [];
		while ($this->in()) {
			$parts = [];
			$this->beginset(); # set of AttributeTypeAndValue
			while ($this->in()) {
				$this->beginsequence();
				$parts[$this->oid()] = $this->next(); # AttributeValue
				$this->end();
			}
			$this->end();
			$res[] = $parts;
		}
		$this->end();

		return $res;
	}

	protected function oid($tag = 6) {
		$v = $this->oid_($this->next($tag));

		return $this->oids[$v] ?? $v;
	}

	protected function oid_($oid) {
		$len = strlen((string) $oid);
		$v = "";
		$n = 0;
		for ($c = 0; $c < $len; ++$c) {
			$x = ord($oid[$c]);
			$n = $n * 128 + ($x & 0x7F);
			if ($x <= 127) {
				$v .= $v ? '.' . $n : ((int) ($n / 40) . '.' . ($n % 40));
				$n = 0;
			}
		}

		return $v . '*';
	}

	protected function time($tag = null) {
		$time = $this->next($tag);
		if ($this->tag == 23) {
			$time = (substr((string) $time, 0, 2) < 50 ? '20' : '19') . $time;
		}
		elseif ($this->tag != 24) {
			trigger_error('expected der utc or generalized time', E_USER_ERROR);
		}

		return $time;
	}

	protected function keyident($tag = 4) {
		return chunk_split(bin2hex((string) $this->next($tag)), 2, ':');
	}
}


1			<?php
2
3			namespace WAYF;
4
5			require_once 'Oids.php';
6
7			class Der extends Oids {
8			protected $tag;
9			protected $len;
10			protected $value;
11			protected $class;
12			protected $constructed;
13			protected $buffer;
14			protected $stack = [];
15			protected $i;
16			private $ignoredextensions = [
			0 ignored issues – show introduced 2022-05-28 00:11 UTC by Report Bug Copy Issue Report The private property `$ignoredextensions` is not used, and could be removed. Loading history...
17			'netscape-cert-type' => 1,
18			];
19			private $id;
20
21			protected function init($der) {
22			$this->buffer = $der;
23			$this->i = 0;
24			$this->id = uniqid();
25			}
26
27			protected function dump($note = '') {
28			$z = strlen((string) $this->buffer) - $this->i;
29			print_r("{$note}\n");
30			print_r("len: {$z}\n");
31			print_r(chunk_split(bin2hex(substr((string) $this->buffer, $this->i)), 2, ':'));
32			echo "\n";
33			}
34
35			protected function pr($note = '') {
36			$savei = $this->i;
37			$byte = ord($this->buffer[$this->i++]);
38			$tag = $byte & 0x1F;
39			$class = $byte & 0xC0;
40			$constructed = $byte & 0x20;
			0 ignored issues – show Unused Code introduced 2022-05-28 00:11 UTC by Report Bug Copy Issue Report The assignment to `$constructed` is dead and can be removed. Loading history...
41			$len = $this->vallen();
42			$this->i = $savei;
43			print_r("{$note}\n");
44			print_r("i : {$this->i}\n");
45			print_r("len: {$len}\n");
46			print_r("class: {$class}\n");
47			print_r("tag : {$tag}\n");
48			print_r(chunk_split(bin2hex(substr((string) $this->buffer, $this->i, min(32, strlen((string) $this->buffer) - $this->i))) . "\n", 2, ':'));
49			print_r("---\n");
50			}
51
52			private function tlv($expectedtag = null) {
53			$byte = ord($this->buffer[$this->i++]);
54			$this->tag = $byte & 0x1F;
55			if ($expectedtag < 0) {
56			$this->tag = $expectedtag = -$expectedtag;
57			}
58			if ($expectedtag && $expectedtag != $this->tag) {
59			trigger_error("expected tag == {$expectedtag}, got {$this->tag} {$this->id}\n", E_USER_ERROR);
60			}
61			$this->class = $byte & 0xC0;
62			$this->constructed = $byte & 0x20;
63			$this->len = $this->vallen();
64			}
65
66			protected function next($expectedtag = null) {
67			$this->tlv($expectedtag);
68			if ($this->constructed) {
69			return;
70			}
71			$value = substr((string) $this->buffer, $this->i, $this->len);
72			if ($this->class == 0 \|\| $this->class == 0x80) {
73			if ($this->tag == 2 \|\| $this->tag == 10) { # ints and enums
74			$int = 0;
75			foreach (str_split($value) as $byte) {
76			$int = bcmul($int, '256', 0);
77			$int = bcadd($int, ord($byte), 0);
78			}
79			$this->value = $int;
80			}
81			elseif ($this->tag == 1) { # boolean
82			$this->value = ord($value) != 0;
83			}
84			elseif ($this->tag == 3) { # bit string
85			$this->value = $value;
86			}
87			elseif ($this->tag == 5) { # null
88			$this->value = null;
89			}
90			else {
91			$this->value = $value;
92			}
93			}
94			$this->i += $this->len;
95
96			return $this->value;
97			}
98
99			protected function der($expectedtag = null, $pass = false) {
100			$oldi = $this->i;
101			$this->tlv($expectedtag);
102			$i = $this->i;
103			if (!$pass) {
104			$this->i = $oldi;
105			}
106			else {
107			$this->i += $this->len;
108			}
109
110			return substr((string) $this->buffer, $oldi, $this->len + $i - $oldi);
111			}
112
113			/*
114			* if provided with a tag and the tag is equal to the current tag
115			* peek considers it EXPLICIT, consumes it and return true
116			*/
117			protected function peek($tag = null) {
118			$t = null;
119			if ($this->i < end($this->stack)) {
120			$t = ord($this->buffer[$this->i]) & 0x1F;
121			}
122			if ($tag !== null) {
123			if ($t === $tag) {
124			$this->next($tag);
125
126			return true;
127			}
128
129			return false;
130			}
131
132			return $t;
133			}
134
135			protected function vallen() {
136			$byte = ord($this->buffer[$this->i++]);
137			$res = $len = $byte & 0x7F;
138			if ($byte >= 0x80) {
139			$res = 0;
140			for ($c = 0; $c < $len; ++$c) {
141			$res = $res * 256 + ord($this->buffer[$this->i++]);
142			}
143			}
144
145			return $res;
146			}
147
148			protected function beginsequence($tag = 16) {
149			$this->begin($tag);
150			}
151
152			protected function beginset($tag = 17) {
153			$this->begin($tag);
154			}
155
156			protected function begin($tag) {
157			$this->next($tag);
158			array_push($this->stack, $this->i + $this->len);
159			}
160
161			protected function in() {
162			return $this->i < end($this->stack);
163			}
164
165			protected function end() {
166			$end = array_pop($this->stack);
167			if ($end != $this->i) {
168			trigger_error("sequence or set length does not match: {$end} != {$this->i}", E_USER_ERROR);
169			}
170			}
171
172			protected function extensions() {
173			$this->beginsequence();
174			$extns = [];
175			while ($this->in()) {
176			$this->beginsequence();
177			$extnID = $this->oid();
178			$theext['critical'] = $this->peek(1);
179			$theext['extnValue'] = $this->next(4);
180
181			try {
182			if (method_exists($this, $extnID)) {
183			$theext['extnValue'] = call_user_func([$this, $extnID], $theext['extnValue']);
			0 ignored issues – show Comprehensibility Best Practice introduced 2022-05-28 00:11 UTC by Report Bug Copy Issue Report The variable `$theext` does not seem to be defined for all execution paths leading up to this point. Loading history...
184			}
185			elseif (!empty($ignoredextensions['$extnID'])) {
			0 ignored issues – show Comprehensibility Best Practice introduced 2022-05-28 00:11 UTC by Report Bug Copy Issue Report The variable `$ignoredextensions` seems to never exist and therefore `empty` should always be `true`. Loading history...
186			trigger_error("Unknown extension {$extnID}", E_USER_ERROR);
187			}
188			else {
189			$theext['extnValue'] = chunk_split(bin2hex((string) $theext['extnValue']), 2, ':');
190			}
191			}
192			catch (\Exception) {
193			$theext['extnValue'] = chunk_split(bin2hex((string) $theext['extnValue']), 2, ':');
194			}
195			$this->end();
196			$extns[$extnID] = $theext;
197			}
198			$this->end();
199
200			return $extns;
201			}
202
203			protected function signatureAlgorithm() {
204			$this->beginsequence();
205			$salg = $this->oid();
206			if ($this->in()) {
207			$this->next(); # alg param - ignore for now
208			}
209			$this->end();
210
211			return $salg;
212			}
213
214			protected function name($tag = null) {
215			$this->beginsequence($tag);
216			$res = [];
217			while ($this->in()) {
218			$parts = [];
219			$this->beginset(); # set of AttributeTypeAndValue
220			while ($this->in()) {
221			$this->beginsequence();
222			$parts[$this->oid()] = $this->next(); # AttributeValue
223			$this->end();
224			}
225			$this->end();
226			$res[] = $parts;
227			}
228			$this->end();
229
230			return $res;
231			}
232
233			protected function oid($tag = 6) {
234			$v = $this->oid_($this->next($tag));
235
236			return $this->oids[$v] ?? $v;
237			}
238
239			protected function oid_($oid) {
240			$len = strlen((string) $oid);
241			$v = "";
242			$n = 0;
243			for ($c = 0; $c < $len; ++$c) {
244			$x = ord($oid[$c]);
245			$n = $n * 128 + ($x & 0x7F);
246			if ($x <= 127) {
247			$v .= $v ? '.' . $n : ((int) ($n / 40) . '.' . ($n % 40));
248			$n = 0;
249			}
250			}
251
252			return $v . '*';
253			}
254
255			protected function time($tag = null) {
256			$time = $this->next($tag);
257			if ($this->tag == 23) {
258			$time = (substr((string) $time, 0, 2) < 50 ? '20' : '19') . $time;
259			}
260			elseif ($this->tag != 24) {
261			trigger_error('expected der utc or generalized time', E_USER_ERROR);
262			}
263
264			return $time;
265			}
266
267			protected function keyident($tag = 4) {
268			return chunk_split(bin2hex((string) $this->next($tag)), 2, ':');
269			}
270			}
271

grommunio / grommunio-web

Push — master ( 42b683...7c1a7f )

Der::peek() A

Complexity

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Duplication

Importance

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