Artifact 84db523991abe589cc692a2e9f9847e11d4064b7078987be1ba01676823d5bc3:
- File
src/OFASN1ObjectIdentifier.m
— part of check-in
[b1944fd052]
at
2018-10-27 13:01:38
on branch trunk
— Do not subclass OFASN1Value
The reason for this is that OFASN1Value requires an initializer for DER
encoding, however, it might be beneficial to create an ASN.1 type
without providing DER encoding for it. (user: js, size: 3393) [annotate] [blame] [check-ins using]
/* * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, * 2018 * Jonathan Schleifer <js@heap.zone> * * All rights reserved. * * This file is part of ObjFW. It may be distributed under the terms of the * Q Public License 1.0, which can be found in the file LICENSE.QPL included in * the packaging of this file. * * Alternatively, it may be distributed under the terms of the GNU General * Public License, either version 2 or 3, which can be found in the file * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this * file. */ #include "config.h" #import "OFASN1ObjectIdentifier.h" #import "OFArray.h" #import "OFData.h" #import "OFNumber.h" #import "OFString.h" #import "OFInvalidArgumentException.h" #import "OFInvalidFormatException.h" #import "OFOutOfRangeException.h" @implementation OFASN1ObjectIdentifier @synthesize subidentifiers = _subidentifiers; - (instancetype)init { OF_INVALID_INIT_METHOD } - (instancetype)initWithTagClass: (of_asn1_tag_class_t)tagClass tagNumber: (of_asn1_tag_number_t)tagNumber constructed: (bool)constructed DEREncodedContents: (OFData *)DEREncodedContents { self = [super init]; @try { void *pool = objc_autoreleasePoolPush(); const unsigned char *items = [DEREncodedContents items]; size_t count = [DEREncodedContents count]; OFMutableArray *subidentifiers = [OFMutableArray array]; uintmax_t value = 0; uint_fast8_t bits = 0; if (tagClass != OF_ASN1_TAG_CLASS_UNIVERSAL || tagNumber != OF_ASN1_TAG_NUMBER_OBJECT_IDENTIFIER || constructed) @throw [OFInvalidArgumentException exception]; if ([DEREncodedContents itemSize] != 1 || count == 0) @throw [OFInvalidArgumentException exception]; for (size_t i = 0; i < count; i++) { if (bits == 0 && items[i] == 0x80) @throw [OFInvalidFormatException exception]; value = (value << 7) | (items[i] & 0x7F); bits += 7; if (bits > sizeof(uintmax_t) * 8) @throw [OFOutOfRangeException exception]; if (items[i] & 0x80) continue; if ([subidentifiers count] == 0) { if (value < 40) [subidentifiers addObject: [OFNumber numberWithUIntMax: 0]]; else if (value < 80) { [subidentifiers addObject: [OFNumber numberWithUIntMax: 1]]; value -= 40; } else { [subidentifiers addObject: [OFNumber numberWithUIntMax: 2]]; value -= 80; } } [subidentifiers addObject: [OFNumber numberWithUIntMax: value]]; value = 0; bits = 0; } if (items[count - 1] & 0x80) @throw [OFInvalidFormatException exception]; [subidentifiers makeImmutable]; _subidentifiers = [subidentifiers copy]; objc_autoreleasePoolPop(pool); } @catch (id e) { [self release]; @throw e; } return self; } - (void)dealloc { [_subidentifiers release]; [super dealloc]; } - (bool)isEqual: (id)object { OFASN1ObjectIdentifier *objectIdentifier; if (![object isKindOfClass: [OFASN1ObjectIdentifier class]]) return false; objectIdentifier = object; if (![objectIdentifier->_subidentifiers isEqual: _subidentifiers]) return false; return true; } - (uint32_t)hash { return [_subidentifiers hash]; } - (OFString *)description { return [OFString stringWithFormat: @"<OFASN1ObjectIdentifier: %@>", [_subidentifiers componentsJoinedByString: @"."]]; } @end