ObjFW  Diff

#import "OFInvalidArgumentException.h"
#import "OFInvalidFormatException.h"
#import "OFOutOfRangeException.h"

@implementation OFASN1ObjectIdentifier
@synthesize subidentifiers = _subidentifiers;

+ (instancetype)objectIdentifierWithSubidentifiers:
    (OFArray OF_GENERIC(OFNumber *) *)subidentifiers
{
	return [[[self alloc]
	    initWithSubidentifiers: subidentifiers] autorelease];
}

- (instancetype)init
- (instancetype)initWithSubidentifiers:
    (OFArray OF_GENERIC(OFNumber *) *)subidentifiers
{
	self = [super init];
	OF_INVALID_INIT_METHOD

	@try {
		if ([subidentifiers count] < 1)
			@throw [OFInvalidFormatException exception];

		switch ([[subidentifiers objectAtIndex: 0] intMaxValue]) {
		case 0:
		case 1:
		case 2:
			break;
		default:
			@throw [OFInvalidFormatException exception];
		}

		_subidentifiers = [subidentifiers copy];
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- (instancetype)initWithTagClass: (of_asn1_tag_class_t)tagClass
		       tagNumber: (of_asn1_tag_number_t)tagNumber
		     constructed: (bool)constructed
	      DEREncodedContents: (OFData *)DEREncodedContents
{
	self = [super init];
	void *pool = objc_autoreleasePoolPush();
	OFMutableArray OF_GENERIC(OFNumber *) *subidentifiers;

	@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];

		subidentifiers = [OFMutableArray array];

		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;

			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;
	}

	self = [self initWithSubidentifiers: subidentifiers];

	objc_autoreleasePoolPop(pool);

	return self;
}

- (instancetype)init
{
	OF_INVALID_INIT_METHOD
}

- (void)dealloc
{
	[_subidentifiers release];

	[super dealloc];
}