/**
* @dataProvider getTags
* @depends testGetBinary
*/
public function testFromBinary($originalTag)
{
$originalStringObject = new PrintableString('test');
$originalObject = new ExplicitlyTaggedObject($originalTag, $originalStringObject);
$binaryData = $originalObject->getBinary();
$parsedObject = ExplicitlyTaggedObject::fromBinary($binaryData);
$this->assertEquals($originalObject, $parsedObject);
}
/**
* @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: Context-Specific explicitly tagged object [1] starting at offset 2 is longer than allowed in the outer tag
* @depends testFromBinary
*/
public function testFromBinaryWithInvalidOuterLengthThrowsException2()
{
$data = hex2bin('a102040101');
// ^- this is wrong. correct would be "3"
ExplicitlyTaggedObject::fromBinary($data);
}
/**
* 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());
}
public function testFromBinaryWithMultipleObjects()
{
$object1 = new Boolean(true);
$object2 = new Integer(42);
$identifier = 0xa0;
$length = $object1->getObjectLength() + $object2->getObjectLength();
$data = chr($identifier) . chr($length) . $object1->getBinary() . $object2->getBinary();
$object = ExplicitlyTaggedObject::fromBinary($data);
$this->assertEquals(2 + $length, $object->getObjectLength());
$this->assertEquals([$object1, $object2], $object->getContent());
$this->assertEquals($data, $object->getBinary());
$this->assertEquals('2 context specific objects with tag [0]', $object->__toString());
}
