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author | Anton Luka Šijanec <anton@sijanec.eu> | 2024-05-27 13:08:29 +0200 |
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committer | Anton Luka Šijanec <anton@sijanec.eu> | 2024-05-27 13:08:29 +0200 |
commit | 75160b12821f7f4299cce7f0b69c83c1502ae071 (patch) | |
tree | 27e25e4ccaef45f0c58b22831164050d1af1d4db /vendor/fgrosse/phpasn1/lib/ASN1/Universal/Integer.php | |
parent | prvi-commit (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | vendor/fgrosse/phpasn1/lib/ASN1/Universal/Integer.php | 260 |
1 files changed, 130 insertions, 130 deletions
diff --git a/vendor/fgrosse/phpasn1/lib/ASN1/Universal/Integer.php b/vendor/fgrosse/phpasn1/lib/ASN1/Universal/Integer.php index fe3806b..4b12cd4 100644 --- a/vendor/fgrosse/phpasn1/lib/ASN1/Universal/Integer.php +++ b/vendor/fgrosse/phpasn1/lib/ASN1/Universal/Integer.php @@ -1,130 +1,130 @@ -<?php -/* - * This file is part of the PHPASN1 library. - * - * Copyright © Friedrich Große <friedrich.grosse@gmail.com> - * - * For the full copyright and license information, please view the LICENSE - * file that was distributed with this source code. - */ - -namespace FG\ASN1\Universal; - -use Exception; -use FG\Utility\BigInteger; -use FG\ASN1\Exception\ParserException; -use FG\ASN1\ASNObject; -use FG\ASN1\Parsable; -use FG\ASN1\Identifier; - -class Integer extends ASNObject implements Parsable -{ - /** @var int */ - private $value; - - /** - * @param int $value - * - * @throws Exception if the value is not numeric - */ - public function __construct($value) - { - if (is_numeric($value) == false) { - throw new Exception("Invalid VALUE [{$value}] for ASN1_INTEGER"); - } - $this->value = $value; - } - - public function getType() - { - return Identifier::INTEGER; - } - - public function getContent() - { - return $this->value; - } - - protected function calculateContentLength() - { - return strlen($this->getEncodedValue()); - } - - protected function getEncodedValue() - { - $value = BigInteger::create($this->value, 10); - $negative = $value->compare(0) < 0; - if ($negative) { - $value = $value->absoluteValue(); - $limit = 0x80; - } else { - $limit = 0x7f; - } - - $mod = 0xff+1; - $values = []; - while($value->compare($limit) > 0) { - $values[] = $value->modulus($mod)->toInteger(); - $value = $value->shiftRight(8); - } - - $values[] = $value->modulus($mod)->toInteger(); - $numValues = count($values); - - if ($negative) { - for ($i = 0; $i < $numValues; $i++) { - $values[$i] = 0xff - $values[$i]; - } - for ($i = 0; $i < $numValues; $i++) { - $values[$i] += 1; - if ($values[$i] <= 0xff) { - break; - } - assert($i != $numValues - 1); - $values[$i] = 0; - } - if ($values[$numValues - 1] == 0x7f) { - $values[] = 0xff; - } - } - $values = array_reverse($values); - $r = pack("C*", ...$values); - return $r; - } - - private static function ensureMinimalEncoding($binaryData, $offsetIndex) - { - // All the first nine bits cannot equal 0 or 1, which would - // be non-minimal encoding for positive and negative integers respectively - if ((ord($binaryData[$offsetIndex]) == 0x00 && (ord($binaryData[$offsetIndex+1]) & 0x80) == 0) || - (ord($binaryData[$offsetIndex]) == 0xff && (ord($binaryData[$offsetIndex+1]) & 0x80) == 0x80)) { - throw new ParserException("Integer not minimally encoded", $offsetIndex); - } - } - - public static function fromBinary(&$binaryData, &$offsetIndex = 0) - { - $parsedObject = new static(0); - self::parseIdentifier($binaryData[$offsetIndex], $parsedObject->getType(), $offsetIndex++); - $contentLength = self::parseContentLength($binaryData, $offsetIndex, 1); - - if ($contentLength > 1) { - self::ensureMinimalEncoding($binaryData, $offsetIndex); - } - $isNegative = (ord($binaryData[$offsetIndex]) & 0x80) != 0x00; - $number = BigInteger::create(ord($binaryData[$offsetIndex++]) & 0x7F); - - for ($i = 0; $i < $contentLength - 1; $i++) { - $number = $number->multiply(0x100)->add(ord($binaryData[$offsetIndex++])); - } - - if ($isNegative) { - $number = $number->subtract(BigInteger::create(2)->toPower(8 * $contentLength - 1)); - } - - $parsedObject = new static((string)$number); - $parsedObject->setContentLength($contentLength); - - return $parsedObject; - } -} +<?php
+/*
+ * This file is part of the PHPASN1 library.
+ *
+ * Copyright © Friedrich Große <friedrich.grosse@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace FG\ASN1\Universal;
+
+use Exception;
+use FG\Utility\BigInteger;
+use FG\ASN1\Exception\ParserException;
+use FG\ASN1\ASNObject;
+use FG\ASN1\Parsable;
+use FG\ASN1\Identifier;
+
+class Integer extends ASNObject implements Parsable
+{
+ /** @var int */
+ private $value;
+
+ /**
+ * @param int $value
+ *
+ * @throws Exception if the value is not numeric
+ */
+ public function __construct($value)
+ {
+ if (is_numeric($value) == false) {
+ throw new Exception("Invalid VALUE [{$value}] for ASN1_INTEGER");
+ }
+ $this->value = $value;
+ }
+
+ public function getType()
+ {
+ return Identifier::INTEGER;
+ }
+
+ public function getContent()
+ {
+ return $this->value;
+ }
+
+ protected function calculateContentLength()
+ {
+ return strlen($this->getEncodedValue());
+ }
+
+ protected function getEncodedValue()
+ {
+ $value = BigInteger::create($this->value, 10);
+ $negative = $value->compare(0) < 0;
+ if ($negative) {
+ $value = $value->absoluteValue();
+ $limit = 0x80;
+ } else {
+ $limit = 0x7f;
+ }
+
+ $mod = 0xff+1;
+ $values = [];
+ while($value->compare($limit) > 0) {
+ $values[] = $value->modulus($mod)->toInteger();
+ $value = $value->shiftRight(8);
+ }
+
+ $values[] = $value->modulus($mod)->toInteger();
+ $numValues = count($values);
+
+ if ($negative) {
+ for ($i = 0; $i < $numValues; $i++) {
+ $values[$i] = 0xff - $values[$i];
+ }
+ for ($i = 0; $i < $numValues; $i++) {
+ $values[$i] += 1;
+ if ($values[$i] <= 0xff) {
+ break;
+ }
+ assert($i != $numValues - 1);
+ $values[$i] = 0;
+ }
+ if ($values[$numValues - 1] == 0x7f) {
+ $values[] = 0xff;
+ }
+ }
+ $values = array_reverse($values);
+ $r = pack("C*", ...$values);
+ return $r;
+ }
+
+ private static function ensureMinimalEncoding($binaryData, $offsetIndex)
+ {
+ // All the first nine bits cannot equal 0 or 1, which would
+ // be non-minimal encoding for positive and negative integers respectively
+ if ((ord($binaryData[$offsetIndex]) == 0x00 && (ord($binaryData[$offsetIndex+1]) & 0x80) == 0) ||
+ (ord($binaryData[$offsetIndex]) == 0xff && (ord($binaryData[$offsetIndex+1]) & 0x80) == 0x80)) {
+ throw new ParserException("Integer not minimally encoded", $offsetIndex);
+ }
+ }
+
+ public static function fromBinary(&$binaryData, &$offsetIndex = 0)
+ {
+ $parsedObject = new static(0);
+ self::parseIdentifier($binaryData[$offsetIndex], $parsedObject->getType(), $offsetIndex++);
+ $contentLength = self::parseContentLength($binaryData, $offsetIndex, 1);
+
+ if ($contentLength > 1) {
+ self::ensureMinimalEncoding($binaryData, $offsetIndex);
+ }
+ $isNegative = (ord($binaryData[$offsetIndex]) & 0x80) != 0x00;
+ $number = BigInteger::create(ord($binaryData[$offsetIndex++]) & 0x7F);
+
+ for ($i = 0; $i < $contentLength - 1; $i++) {
+ $number = $number->multiply(0x100)->add(ord($binaryData[$offsetIndex++]));
+ }
+
+ if ($isNegative) {
+ $number = $number->subtract(BigInteger::create(2)->toPower(8 * $contentLength - 1));
+ }
+
+ $parsedObject = new static((string)$number);
+ $parsedObject->setContentLength($contentLength);
+
+ return $parsedObject;
+ }
+}
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