41 	/* Number of the file containing this structure or 0xFFFF if ZIP64 archive.
42 	 * Zip archive might span multiple files (disks).
47 	 * 0xFFFF if ZIP64 archive.
52 	 * archive.
57 	 * archive.
61 	/* Size of the central directory record or 0xFFFFFFFF if ZIP64 archive. */
64 	/* Offset of the central directory from the beginning of the archive or
65 	 * 0xFFFFFFFF if ZIP64 archive.
97 	/* Number of the disk where the file starts or 0xFFFF if ZIP64 archive. */
135 static void *check_access(struct zip_archive *archive, __u32 offset, __u32 size)  in check_access()  argument
137 	if (offset + size > archive->size || offset > offset + size)  in check_access()
140 	return archive->data + offset;  in check_access()
144  * archive uses features which are not supported.
146 static int try_parse_end_of_cd(struct zip_archive *archive, __u32 offset)  in try_parse_end_of_cd()  argument
152 	eocd = check_access(archive, offset, sizeof(*eocd));  in try_parse_end_of_cd()
157 	if (offset + sizeof(*eocd) + comment_length != archive->size)  in try_parse_end_of_cd()
167 	if (!check_access(archive, cd_offset, cd_size))  in try_parse_end_of_cd()
170 	archive->cd_offset = cd_offset;  in try_parse_end_of_cd()
171 	archive->cd_records = cd_records;  in try_parse_end_of_cd()
175 static int find_cd(struct zip_archive *archive)  in find_cd()  argument
180 	if (archive->size <= sizeof(struct end_of_cd_record))  in find_cd()
187 	offset = archive->size - sizeof(struct end_of_cd_record);  in find_cd()
191 		rc = try_parse_end_of_cd(archive, offset);  in find_cd()
200 	struct zip_archive *archive;  in zip_archive_open()  local
222 	archive = malloc(sizeof(*archive));  in zip_archive_open()
223 	if (!archive) {  in zip_archive_open()
228 	archive->data = data;  in zip_archive_open()
229 	archive->size = size;  in zip_archive_open()
231 	err = find_cd(archive);  in zip_archive_open()
234 		free(archive);  in zip_archive_open()
238 	return archive;  in zip_archive_open()
241 void zip_archive_close(struct zip_archive *archive)  in zip_archive_close()  argument
243 	munmap(archive->data, archive->size);  in zip_archive_close()
244 	free(archive);  in zip_archive_close()
247 static struct local_file_header *local_file_header_at_offset(struct zip_archive *archive,  in local_file_header_at_offset()  argument
252 	lfh = check_access(archive, offset, sizeof(*lfh));  in local_file_header_at_offset()
259 static int get_entry_at_offset(struct zip_archive *archive, __u32 offset, struct zip_entry *out)  in get_entry_at_offset()  argument
266 	lfh = local_file_header_at_offset(archive, offset);  in get_entry_at_offset()
274 	name = check_access(archive, offset, lfh->file_name_length);  in get_entry_at_offset()
279 	if (!check_access(archive, offset, lfh->extra_field_length))  in get_entry_at_offset()
284 	data = check_access(archive, offset, compressed_size);  in get_entry_at_offset()
298 int zip_archive_find_entry(struct zip_archive *archive, const char *file_name,  in zip_archive_find_entry()  argument
302 	__u32 i, offset = archive->cd_offset;  in zip_archive_find_entry()
304 	for (i = 0; i < archive->cd_records; ++i) {  in zip_archive_find_entry()
309 		cdfh = check_access(archive, offset, sizeof(*cdfh));  in zip_archive_find_entry()
315 		cdfh_name = check_access(archive, offset, cdfh_name_length);  in zip_archive_find_entry()
323 		    memcmp(file_name, archive->data + offset, file_name_length) == 0) {  in zip_archive_find_entry()
324 			return get_entry_at_offset(archive, cdfh->offset, out);  in zip_archive_find_entry()