ObjFW  Diff

{
	self = [super init];

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

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

{
	void *pool = objc_autoreleasePoolPush();
	OFMutableArray OF_GENERIC(OFNumber *) *subidentifiers;

	@try {
		const unsigned char *items = DEREncodedContents.items;
		size_t count = DEREncodedContents.count;
		uintmax_t value = 0;
		unsigned long long 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;

			if (bits > sizeof(uintmax_t) * 8)
			if (bits > sizeof(unsigned long long) * 8)
				@throw [OFOutOfRangeException exception];

			if (items[i] & 0x80)
				continue;

			if (subidentifiers.count == 0) {
				if (value < 40)
					[subidentifiers addObject:
					    [OFNumber numberWithUIntMax: 0]];
					    [OFNumber numberWithInt: 0]];
				else if (value < 80) {
					[subidentifiers addObject:
					    [OFNumber numberWithUIntMax: 1]];
					    [OFNumber numberWithInt: 1]];
					value -= 40;
				} else {
					[subidentifiers addObject:
					    [OFNumber numberWithUIntMax: 2]];
					    [OFNumber numberWithInt: 2]];
					value -= 80;
				}
			}

			[subidentifiers addObject:
			    [OFNumber numberWithUIntMax: value]];
			    [OFNumber numberWithUnsignedLongLong: value]];

			value = 0;
			bits = 0;
		}

		if (items[count - 1] & 0x80)
			@throw [OFInvalidFormatException exception];