/*
* 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 "OFInvalidArgumentException.h"
#import "OFInvalidFormatException.h"
#import "OFOutOfRangeException.h"
@implementation OFASN1Integer
@synthesize integerValue = _integerValue;
- (instancetype)initWithTagClass: (of_asn1_tag_class_t)tagClass
tagNumber: (of_asn1_tag_number_t)tagNumber
constructed: (bool)constructed
DEREncodedContents: (OFData *)DEREncodedContents
{
self = [super initWithTagClass: tagClass
tagNumber: tagNumber
constructed: constructed
DEREncodedContents: DEREncodedContents];
@try {
const unsigned char *items;
size_t count;
uintmax_t value;
if (_tagClass != OF_ASN1_TAG_CLASS_UNIVERSAL ||
_tagNumber != OF_ASN1_TAG_NUMBER_INTEGER || _constructed)
@throw [OFInvalidArgumentException exception];
/* TODO: Support for big numbers */
items = [_DEREncodedContents items];
count = [_DEREncodedContents count];
value = 0;
if (count > sizeof(uintmax_t) &&
(count != sizeof(uintmax_t) + 1 || items[0] != 0))
@throw [OFOutOfRangeException exception];
if (count >= 2 && ((items[0] == 0 && !(items[1] & 0x80)) ||
(items[0] == 0xFF && items[1] & 0x80)))
@throw [OFInvalidFormatException exception];
if (count >= 1 && items[0] & 0x80)
value = ~(uintmax_t)0;
while (count--)
value = (value << 8) | *items++;
_integerValue = value;
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
@end