PHP библиотека для кодирования и декодирования алгоритмов X.690 ASN.1 DER для Joomla 3 и Joomla 4
Пример кода для Joomla 3 и Joomla 4.
<?php defined('_JEXEC') or die('Restricted access'); use \Sop\ASN1\Element; use \Sop\ASN1\Type\Constructed\Sequence; // Для Joomla 3 JLoader::registerNamespace('Sop', JPATH_LIBRARIES); // ИЛИ // для Joomla 4 JLoader::registerNamespace('Sop', JPATH_LIBRARIES. '/Sop');
В Joomla 3 следует указывать путь, после которого начинается namespace.
В Joomla 4 следует указывать путь вплоть до каталога, где начинается namespace.
A PHP library for X.690 Abstract Syntax Notation One (ASN.1) Distinguished Encoding Rules (DER) encoding and decoding.
This library is available on Packagist.
composer require sop/asn1
The general idea is that each ASN.1 type has its corresponding PHP class, that knows the details of encoding and decoding the specific type.
To decode DER data, use fromDER
static method of the expected type. To encode object to DER, use toDER
instance method.
Many methods return an UnspecifiedType
object, that works as an intermediate wrapper with accessor methods ensuring type safety.
All objects are immutable and method chaining is promoted for the fluency of the API. Exception shall be thrown on errors.
Here are some simple usage examples. Namespaces are omitted for brevity.
Encode a sequence containing a UTF-8 string, an integer and an explicitly tagged object identifier, conforming to the following ASN.1 specification:
Example ::= SEQUENCE { greeting UTF8String, answer INTEGER, type [1] EXPLICIT OBJECT IDENTIFIER }
$seq = new Sequence( new UTF8String('Hello'), new Integer(42), new ExplicitlyTaggedType( 1, new ObjectIdentifier('1.3.6.1.3')) ); $der = $seq->toDER();
Decode DER encoding from above.
$seq = UnspecifiedType::fromDER($der)->asSequence(); $greeting = $seq->at(0)->asUTF8String()->string(); $answer = $seq->at(1)->asInteger()->intNumber(); $type = $seq->at(2)->asTagged()->asExplicit()->asObjectIdentifier()->oid();
See the following for more practical real-world usage examples.
TBSCertificate
sequence)