public static function createObject($tagClass, $tagName, $isConstructed, $value, $lengthForm, $children = [])
{
$identifier = self::createIdentifier($tagClass, $tagName, $isConstructed);
if ($identifier->tagClass === Identifier::CLASS_UNIVERSAL && $identifier->isConstructed === false) {
//для простых элементов вызываем конструктор
switch ($identifier->getTagNumber()) {
case Identifier::BITSTRING:
$value = Universal\BitString::encodeValue($value);
break;
case Identifier::BOOLEAN:
$value = Universal\Boolean::encodeValue($value);
break;
case Identifier::ENUMERATED:
$value = Universal\Enumerated::encodeValue($value);
break;
case Identifier::INTEGER:
$value = Universal\Integer::encodeValue($value);
break;
case Identifier::NULL:
$value = Universal\NullObject::encodeValue($value);
break;
case Identifier::OBJECT_IDENTIFIER:
$value = Universal\ObjectIdentifier::encodeValue($value);
break;
case Identifier::OCTETSTRING:
$value = Universal\OctetString::encodeValue($value);
break;
case Identifier::UTC_TIME:
$value = Universal\UTCTime::encodeValue($value);
break;
case Identifier::GENERALIZED_TIME:
$value = Universal\GeneralizedTime::encodeValue($value);
break;
case Identifier::IA5_STRING:
$value = Universal\IA5String::encodeValue($value);
break;
case Identifier::PRINTABLE_STRING:
$value = Universal\PrintableString::encodeValue($value);
break;
case Identifier::NUMERIC_STRING:
$value = Universal\NumericString::encodeValue($value);
break;
case Identifier::UTF8_STRING:
$value = Universal\UTF8String::encodeValue($value);
break;
case Identifier::UNIVERSAL_STRING:
$value = Universal\UniversalString::encodeValue($value);
break;
case Identifier::CHARACTER_STRING:
$value = Universal\CharacterString::encodeValue($value);
break;
case Identifier::GENERAL_STRING:
$value = Universal\GeneralString::encodeValue($value);
break;
case Identifier::VISIBLE_STRING:
$value = Universal\VisibleString::encodeValue($value);
break;
case Identifier::GRAPHIC_STRING:
$value = Universal\GraphicString::encodeValue($value);
break;
case Identifier::BMP_STRING:
$value = Universal\BMPString::encodeValue($value);
break;
case Identifier::T61_STRING:
$value = Universal\T61String::encodeValue($value);
break;
case Identifier::OBJECT_DESCRIPTOR:
$value = Universal\ObjectDescriptor::encodeValue($value);
break;
default:
// At this point the identifier may be >1 byte.
if ($identifier->isConstructed) {
$value = UnknownConstructedObject::encodeValue($value);
} else {
$value = UnknownObject::encodeValue($value);
}
}
}
if ($children) {
$contentOctets = '';
foreach ($children as $child) {
$contentOctets .= $child->getBinary();
}
} else {
$contentOctets = $value;
}
$contentLength = self::createContentLength($contentOctets, $lengthForm);
$content = new Content($contentOctets);
if ($identifier->tagClass === Identifier::CLASS_UNIVERSAL) {
//для простых элементов вызываем конструктор
switch ($identifier->getTagNumber()) {
case Identifier::BITSTRING:
return new Universal\BitString($identifier, $contentLength, $content, $children);
case Identifier::BOOLEAN:
return new Universal\Boolean($identifier, $contentLength, $content, $children);
case Identifier::ENUMERATED:
return new Universal\Enumerated($identifier, $contentLength, $content, $children);
case Identifier::INTEGER:
return new Universal\Integer($identifier, $contentLength, $content, $children);
case Identifier::NULL:
return new Universal\NullObject($identifier, $contentLength, $content, $children);
case Identifier::OBJECT_IDENTIFIER:
return new Universal\ObjectIdentifier($identifier, $contentLength, $content, $children);
case Identifier::RELATIVE_OID:
return new Universal\RelativeObjectIdentifier($identifier, $contentLength, $content, $children);
case Identifier::OCTETSTRING:
return new Universal\OctetString($identifier, $contentLength, $content, $children);
case Identifier::SEQUENCE:
return new Universal\Sequence($identifier, $contentLength, $content, $children);
case Identifier::SET:
return new Universal\Set($identifier, $contentLength, $content, $children);
case Identifier::UTC_TIME:
return new Universal\UTCTime($identifier, $contentLength, $content, $children);
case Identifier::GENERALIZED_TIME:
return new Universal\GeneralizedTime($identifier, $contentLength, $content, $children);
case Identifier::IA5_STRING:
return new Universal\IA5String($identifier, $contentLength, $content, $children);
case Identifier::PRINTABLE_STRING:
return new Universal\PrintableString($identifier, $contentLength, $content, $children);
case Identifier::NUMERIC_STRING:
return new Universal\NumericString($identifier, $contentLength, $content, $children);
case Identifier::UTF8_STRING:
return new Universal\UTF8String($identifier, $contentLength, $content, $children);
case Identifier::UNIVERSAL_STRING:
return new Universal\UniversalString($identifier, $contentLength, $content, $children);
case Identifier::CHARACTER_STRING:
return new Universal\CharacterString($identifier, $contentLength, $content, $children);
case Identifier::GENERAL_STRING:
return new Universal\GeneralString($identifier, $contentLength, $content, $children);
case Identifier::VISIBLE_STRING:
return new Universal\VisibleString($identifier, $contentLength, $content, $children);
case Identifier::GRAPHIC_STRING:
return new Universal\GraphicString($identifier, $contentLength, $content, $children);
case Identifier::BMP_STRING:
return new Universal\BMPString($identifier, $contentLength, $content, $children);
case Identifier::T61_STRING:
return new Universal\T61String($identifier, $contentLength, $content, $children);
case Identifier::OBJECT_DESCRIPTOR:
return new Universal\ObjectDescriptor($identifier, $contentLength, $content, $children);
default:
// At this point the identifier may be >1 byte.
if ($identifier->isConstructed) {
return new UnknownConstructedObject($identifier, $contentLength, $content, $children);
} else {
return new UnknownObject($identifier, $contentLength, $content, $children);
}
}
}
if ($identifier->tagClass === Identifier::CLASS_CONTEXT_SPECIFIC) {
if ($identifier->isConstructed) {
return new ExplicitlyTaggedObject($identifier, $contentLength, $content, $children);
} else {
return new ImplicitlyTaggedObject($identifier, $contentLength, $content, $children);
}
}
}
/**
* @param string $binaryData
* @param int $offsetIndex
*
* @throws ParserException
*
* @return \FG\ASN1\Object
*/
public static function fromBinary(&$binaryData, &$offsetIndex = 0)
{
if (strlen($binaryData) <= $offsetIndex) {
throw new ParserException('Can not parse binary from data: Offset index larger than input size', $offsetIndex);
}
$identifierOctet = ord($binaryData[$offsetIndex]);
if (Identifier::isContextSpecificClass($identifierOctet) && Identifier::isConstructed($identifierOctet)) {
return ExplicitlyTaggedObject::fromBinary($binaryData, $offsetIndex);
}
switch ($identifierOctet) {
case Identifier::BITSTRING:
return BitString::fromBinary($binaryData, $offsetIndex);
case Identifier::BOOLEAN:
return Boolean::fromBinary($binaryData, $offsetIndex);
case Identifier::ENUMERATED:
return Enumerated::fromBinary($binaryData, $offsetIndex);
case Identifier::INTEGER:
return Integer::fromBinary($binaryData, $offsetIndex);
case Identifier::NULL:
return NullObject::fromBinary($binaryData, $offsetIndex);
case Identifier::OBJECT_IDENTIFIER:
return ObjectIdentifier::fromBinary($binaryData, $offsetIndex);
case Identifier::RELATIVE_OID:
return RelativeObjectIdentifier::fromBinary($binaryData, $offsetIndex);
case Identifier::OCTETSTRING:
return OctetString::fromBinary($binaryData, $offsetIndex);
case Identifier::SEQUENCE:
return Sequence::fromBinary($binaryData, $offsetIndex);
case Identifier::SET:
return Set::fromBinary($binaryData, $offsetIndex);
case Identifier::UTC_TIME:
return UTCTime::fromBinary($binaryData, $offsetIndex);
case Identifier::GENERALIZED_TIME:
return GeneralizedTime::fromBinary($binaryData, $offsetIndex);
case Identifier::IA5_STRING:
return IA5String::fromBinary($binaryData, $offsetIndex);
case Identifier::PRINTABLE_STRING:
return PrintableString::fromBinary($binaryData, $offsetIndex);
case Identifier::NUMERIC_STRING:
return NumericString::fromBinary($binaryData, $offsetIndex);
case Identifier::UTF8_STRING:
return UTF8String::fromBinary($binaryData, $offsetIndex);
case Identifier::UNIVERSAL_STRING:
return UniversalString::fromBinary($binaryData, $offsetIndex);
case Identifier::CHARACTER_STRING:
return CharacterString::fromBinary($binaryData, $offsetIndex);
case Identifier::GENERAL_STRING:
return GeneralString::fromBinary($binaryData, $offsetIndex);
case Identifier::VISIBLE_STRING:
return VisibleString::fromBinary($binaryData, $offsetIndex);
case Identifier::GRAPHIC_STRING:
return GraphicString::fromBinary($binaryData, $offsetIndex);
case Identifier::BMP_STRING:
return BMPString::fromBinary($binaryData, $offsetIndex);
case Identifier::T61_STRING:
return T61String::fromBinary($binaryData, $offsetIndex);
case Identifier::OBJECT_DESCRIPTOR:
return ObjectDescriptor::fromBinary($binaryData, $offsetIndex);
default:
// At this point the identifier may be >1 byte.
if (Identifier::isConstructed($identifierOctet)) {
return new UnknownConstructedObject($binaryData, $offsetIndex);
} else {
$identifier = self::parseBinaryIdentifier($binaryData, $offsetIndex);
$lengthOfUnknownObject = self::parseContentLength($binaryData, $offsetIndex);
$offsetIndex += $lengthOfUnknownObject;
return new UnknownObject($identifier, $lengthOfUnknownObject);
}
}
}
/**
* @expectedException \FG\ASN1\Exception\ParserException
* @expectedExceptionMessage ASN.1 Parser Exception at offset 2: An ASN.1 Null should not have a length other than zero. Extracted length was 1
* @depends testFromBinary
*/
public function testFromBinaryWithInvalidLength01()
{
$binaryData = chr(Identifier::NULL);
$binaryData .= chr(0x1);
NullObject::fromBinary($binaryData);
}
/**
* For the real parsing tests look in the test cases of each single ASn object.
*/
public function testFromBinary()
{
/* @var BitString $parsedObject */
$binaryData = chr(Identifier::BITSTRING);
$binaryData .= chr(0x3);
$binaryData .= chr(0x5);
$binaryData .= chr(0xff);
$binaryData .= chr(0xa0);
$expectedObject = new BitString(0xffa0, 5);
$parsedObject = Object::fromBinary($binaryData);
$this->assertTrue($parsedObject instanceof BitString);
$this->assertEquals($expectedObject->getContent(), $parsedObject->getContent());
$this->assertEquals($expectedObject->getNumberOfUnusedBits(), $parsedObject->getNumberOfUnusedBits());
/* @var OctetString $parsedObject */
$binaryData = chr(Identifier::OCTETSTRING);
$binaryData .= chr(0x2);
$binaryData .= chr(0xff);
$binaryData .= chr(0xa0);
$expectedObject = new OctetString(0xffa0);
$parsedObject = Object::fromBinary($binaryData);
$this->assertTrue($parsedObject instanceof OctetString);
$this->assertEquals($expectedObject->getContent(), $parsedObject->getContent());
/* @var \FG\ASN1\Universal\Boolean $parsedObject */
$binaryData = chr(Identifier::BOOLEAN);
$binaryData .= chr(0x1);
$binaryData .= chr(0xff);
$expectedObject = new Boolean(true);
$parsedObject = Object::fromBinary($binaryData);
$this->assertTrue($parsedObject instanceof Boolean);
$this->assertEquals($expectedObject->getContent(), $parsedObject->getContent());
/* @var Enumerated $parsedObject */
$binaryData = chr(Identifier::ENUMERATED);
$binaryData .= chr(0x1);
$binaryData .= chr(0x3);
$expectedObject = new Enumerated(3);
$parsedObject = Object::fromBinary($binaryData);
$this->assertTrue($parsedObject instanceof Enumerated);
$this->assertEquals($expectedObject->getContent(), $parsedObject->getContent());
/* @var IA5String $parsedObject */
$string = 'Hello Foo World!!!11EinsEins!1';
$binaryData = chr(Identifier::IA5_STRING);
$binaryData .= chr(strlen($string));
$binaryData .= $string;
$expectedObject = new IA5String($string);
$parsedObject = Object::fromBinary($binaryData);
$this->assertTrue($parsedObject instanceof IA5String);
$this->assertEquals($expectedObject->getContent(), $parsedObject->getContent());
/* @var \FG\ASN1\Universal\Integer $parsedObject */
$binaryData = chr(Identifier::INTEGER);
$binaryData .= chr(0x1);
$binaryData .= chr(123);
$expectedObject = new Integer(123);
$parsedObject = Object::fromBinary($binaryData);
$this->assertTrue($parsedObject instanceof Integer);
$this->assertEquals($expectedObject->getContent(), $parsedObject->getContent());
/* @var \FG\ASN1\Universal\NullObject $parsedObject */
$binaryData = chr(Identifier::NULL);
$binaryData .= chr(0x0);
$expectedObject = new NullObject();
$parsedObject = Object::fromBinary($binaryData);
$this->assertTrue($parsedObject instanceof NullObject);
$this->assertEquals($expectedObject->getContent(), $parsedObject->getContent());
/* @var ObjectIdentifier $parsedObject */
$binaryData = chr(Identifier::OBJECT_IDENTIFIER);
$binaryData .= chr(0x2);
$binaryData .= chr(1 * 40 + 2);
$binaryData .= chr(3);
$expectedObject = new ObjectIdentifier('1.2.3');
$parsedObject = Object::fromBinary($binaryData);
$this->assertTrue($parsedObject instanceof ObjectIdentifier);
$this->assertEquals($expectedObject->getContent(), $parsedObject->getContent());
/* @var PrintableString $parsedObject */
$string = 'This is a test string. #?!%&""';
$binaryData = chr(Identifier::PRINTABLE_STRING);
$binaryData .= chr(strlen($string));
$binaryData .= $string;
$expectedObject = new PrintableString($string);
$parsedObject = Object::fromBinary($binaryData);
$this->assertTrue($parsedObject instanceof PrintableString);
$this->assertEquals($expectedObject->getContent(), $parsedObject->getContent());
/* @var GeneralizedTime $parsedObject */
$binaryData = chr(Identifier::GENERALIZED_TIME);
$binaryData .= chr(15);
$binaryData .= '20120923202316Z';
$expectedObject = new GeneralizedTime('2012-09-23 20:23:16', 'UTC');
$parsedObject = Object::fromBinary($binaryData);
$this->assertTrue($parsedObject instanceof GeneralizedTime);
$this->assertEquals($expectedObject->getContent(), $parsedObject->getContent());
/* @var Sequence $parsedObject */
$binaryData = chr(Identifier::SEQUENCE);
$binaryData .= chr(0x6);
$binaryData .= chr(Identifier::BOOLEAN);
$binaryData .= chr(0x1);
$binaryData .= chr(0x0);
$binaryData .= chr(Identifier::INTEGER);
$binaryData .= chr(0x1);
$binaryData .= chr(0x3);
$expectedChild1 = new Boolean(false);
$expectedChild2 = new Integer(0x3);
$parsedObject = Object::fromBinary($binaryData);
$this->assertTrue($parsedObject instanceof Sequence);
$this->assertEquals(2, $parsedObject->getNumberOfChildren());
$children = $parsedObject->getChildren();
$child1 = $children[0];
$child2 = $children[1];
$this->assertEquals($expectedChild1->getContent(), $child1->getContent());
$this->assertEquals($expectedChild2->getContent(), $child2->getContent());
/* @var ExplicitlyTaggedObject $parsedObject */
$taggedObject = new ExplicitlyTaggedObject(0x1, new PrintableString('Hello tagged world'));
$binaryData = $taggedObject->getBinary();
$parsedObject = Object::fromBinary($binaryData);
$this->assertTrue($parsedObject instanceof ExplicitlyTaggedObject);
// An unknown constructed object containing 2 integer children,
// first 3 bytes are the identifier.
$binaryData = "?�" . chr(Identifier::INTEGER) . "B" . chr(Identifier::INTEGER) . "i";
$offsetIndex = 0;
$parsedObject = OBject::fromBinary($binaryData, $offsetIndex);
$this->assertTrue($parsedObject instanceof UnknownConstructedObject);
$this->assertEquals(substr($binaryData, 0, 3), $parsedObject->getIdentifier());
$this->assertCount(2, $parsedObject->getContent());
$this->assertEquals(strlen($binaryData), $offsetIndex);
$this->assertEquals(10, $parsedObject->getObjectLength());
// First 3 bytes are the identifier
$binaryData = " ��";
$offsetIndex = 0;
$parsedObject = Object::fromBinary($binaryData, $offsetIndex);
$this->assertTrue($parsedObject instanceof UnknownObject);
$this->assertEquals(substr($binaryData, 0, 3), $parsedObject->getIdentifier());
$this->assertEquals('Unparsable Object (1 bytes)', $parsedObject->getContent());
$this->assertEquals(strlen($binaryData), $offsetIndex);
$this->assertEquals(5, $parsedObject->getObjectLength());
}
