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<?php |
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/* |
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* This file is part of the PHPASN1 library. |
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* |
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* Copyright © Friedrich Große <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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|
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namespace WP_DEFENDER_VENDOR\FG\ASN1\Universal; |
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|
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use Exception; |
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use WP_DEFENDER_VENDOR\FG\ASN1\ASNObject; |
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use WP_DEFENDER_VENDOR\FG\ASN1\Parsable; |
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use WP_DEFENDER_VENDOR\FG\ASN1\Identifier; |
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|
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class OctetString extends ASNObject implements Parsable |
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{ |
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protected $value; |
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|
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public function __construct($value) |
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{ |
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if (is_string($value)) { |
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// remove gaps between hex digits |
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$value = preg_replace('/\s|0x/', '', $value); |
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} elseif (is_numeric($value)) { |
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$value = dechex($value); |
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} elseif ($value === null) { |
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return; |
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} else { |
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throw new Exception('OctetString: unrecognized input type!'); |
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} |
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|
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if (strlen($value) % 2 != 0) { |
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// transform values like 1F2 to 01F2 |
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$value = '0'.$value; |
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} |
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|
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$this->value = $value; |
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} |
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|
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public function getType() |
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{ |
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return Identifier::OCTETSTRING; |
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} |
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|
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protected function calculateContentLength() |
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{ |
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return strlen($this->value) / 2; |
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} |
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|
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protected function getEncodedValue() |
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{ |
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$value = $this->value; |
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$result = ''; |
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|
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//Actual content |
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while (strlen($value) >= 2) { |
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// get the hex value byte by byte from the string and and add it to binary result |
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$result .= chr(hexdec(substr($value, 0, 2))); |
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$value = substr($value, 2); |
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} |
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|
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return $result; |
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} |
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|
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public function getContent() |
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{ |
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return strtoupper($this->value); |
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} |
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|
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public function getBinaryContent() |
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{ |
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return $this->getEncodedValue(); |
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} |
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|
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public static function fromBinary(&$binaryData, &$offsetIndex = 0) |
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{ |
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self::parseIdentifier($binaryData[$offsetIndex], Identifier::OCTETSTRING, $offsetIndex++); |
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$contentLength = self::parseContentLength($binaryData, $offsetIndex); |
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|
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$value = substr($binaryData, $offsetIndex, $contentLength); |
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$offsetIndex += $contentLength; |
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|
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$parsedObject = new self(bin2hex($value)); |
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$parsedObject->setContentLength($contentLength); |
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|
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return $parsedObject; |
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} |
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} |
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|
