Artifact da98b024859b862d1533be226b21c760553a1fd233401b628113e82f0bf4416c:
- File
src/OFASN1Integer.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: 2570) [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 "OFASN1Integer.h" #import "OFData.h" #import "OFString.h" #import "OFInvalidArgumentException.h" #import "OFInvalidFormatException.h" #import "OFOutOfRangeException.h" intmax_t of_asn1_integer_parse(const unsigned char *buffer, size_t length) { uintmax_t value = 0; /* TODO: Support for big numbers */ if (length > sizeof(uintmax_t) && (length != sizeof(uintmax_t) + 1 || buffer[0] != 0)) @throw [OFOutOfRangeException exception]; if (length >= 2 && ((buffer[0] == 0 && !(buffer[1] & 0x80)) || (buffer[0] == 0xFF && buffer[1] & 0x80))) @throw [OFInvalidFormatException exception]; if (length >= 1 && buffer[0] & 0x80) value = ~(uintmax_t)0; while (length--) value = (value << 8) | *buffer++; return value; } @implementation OFASN1Integer @synthesize integerValue = _integerValue; - (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 { if (tagClass != OF_ASN1_TAG_CLASS_UNIVERSAL || tagNumber != OF_ASN1_TAG_NUMBER_INTEGER || constructed) @throw [OFInvalidArgumentException exception]; if ([DEREncodedContents itemSize] != 1) @throw [OFInvalidArgumentException exception]; _integerValue = of_asn1_integer_parse( [DEREncodedContents items], [DEREncodedContents count]); } @catch (id e) { [self release]; @throw e; } return self; } - (bool)isEqual: (id)object { OFASN1Integer *integer; if (![object isKindOfClass: [OFASN1Integer class]]) return false; integer = object; if (integer->_integerValue != _integerValue) return false; return true; } - (uint32_t)hash { return (uint32_t)_integerValue; } - (OFString *)description { return [OFString stringWithFormat: @"<OFASN1Integer: %jd>", _integerValue]; } @end