* Copyright (c) 2006 Rene Scharfe
*/
#include "cache.h"
+#include "config.h"
#include "archive.h"
#include "streaming.h"
#include "utf8.h"
static int zip_date;
static int zip_time;
-static unsigned char *zip_dir;
-static unsigned int zip_dir_size;
+/* We only care about the "buf" part here. */
+static struct strbuf zip_dir;
-static unsigned int zip_offset;
-static unsigned int zip_dir_offset;
+static uintmax_t zip_offset;
static uint64_t zip_dir_entries;
static unsigned int max_creator_version;
-#define ZIP_DIRECTORY_MIN_SIZE (1024 * 1024)
#define ZIP_STREAM (1 << 3)
#define ZIP_UTF8 (1 << 11)
unsigned char _end[1];
};
-struct zip_dir_header {
+struct zip64_data_desc {
unsigned char magic[4];
- unsigned char creator_version[2];
- unsigned char version[2];
- unsigned char flags[2];
- unsigned char compression_method[2];
- unsigned char mtime[2];
- unsigned char mdate[2];
unsigned char crc32[4];
- unsigned char compressed_size[4];
- unsigned char size[4];
- unsigned char filename_length[2];
- unsigned char extra_length[2];
- unsigned char comment_length[2];
- unsigned char disk[2];
- unsigned char attr1[2];
- unsigned char attr2[4];
- unsigned char offset[4];
+ unsigned char compressed_size[8];
+ unsigned char size[8];
unsigned char _end[1];
};
unsigned char _end[1];
};
+struct zip64_extra {
+ unsigned char magic[2];
+ unsigned char extra_size[2];
+ unsigned char size[8];
+ unsigned char compressed_size[8];
+ unsigned char _end[1];
+};
+
struct zip64_dir_trailer {
unsigned char magic[4];
unsigned char record_size[8];
*/
#define ZIP_LOCAL_HEADER_SIZE offsetof(struct zip_local_header, _end)
#define ZIP_DATA_DESC_SIZE offsetof(struct zip_data_desc, _end)
+#define ZIP64_DATA_DESC_SIZE offsetof(struct zip64_data_desc, _end)
#define ZIP_DIR_HEADER_SIZE offsetof(struct zip_dir_header, _end)
#define ZIP_DIR_TRAILER_SIZE offsetof(struct zip_dir_trailer, _end)
#define ZIP_EXTRA_MTIME_SIZE offsetof(struct zip_extra_mtime, _end)
#define ZIP_EXTRA_MTIME_PAYLOAD_SIZE \
(ZIP_EXTRA_MTIME_SIZE - offsetof(struct zip_extra_mtime, flags))
+#define ZIP64_EXTRA_SIZE offsetof(struct zip64_extra, _end)
+#define ZIP64_EXTRA_PAYLOAD_SIZE \
+ (ZIP64_EXTRA_SIZE - offsetof(struct zip64_extra, size))
#define ZIP64_DIR_TRAILER_SIZE offsetof(struct zip64_dir_trailer, _end)
#define ZIP64_DIR_TRAILER_RECORD_SIZE \
(ZIP64_DIR_TRAILER_SIZE - \
copy_le16(dest, clamp_max(n, 0xffff, clamped));
}
+static void copy_le32_clamp(unsigned char *dest, uint64_t n, int *clamped)
+{
+ copy_le32(dest, clamp_max(n, 0xffffffff, clamped));
+}
+
+static int strbuf_add_le(struct strbuf *sb, size_t size, uintmax_t n)
+{
+ while (size-- > 0) {
+ strbuf_addch(sb, n & 0xff);
+ n >>= 8;
+ }
+ return -!!n;
+}
+
+static uint32_t clamp32(uintmax_t n)
+{
+ const uintmax_t max = 0xffffffff;
+ return (n < max) ? n : max;
+}
+
static void *zlib_deflate_raw(void *data, unsigned long size,
int compression_level,
unsigned long *compressed_size)
unsigned long compressed_size,
unsigned long crc)
{
- struct zip_data_desc trailer;
-
- copy_le32(trailer.magic, 0x08074b50);
- copy_le32(trailer.crc32, crc);
- copy_le32(trailer.compressed_size, compressed_size);
- copy_le32(trailer.size, size);
- write_or_die(1, &trailer, ZIP_DATA_DESC_SIZE);
-}
-
-static void set_zip_dir_data_desc(struct zip_dir_header *header,
- unsigned long size,
- unsigned long compressed_size,
- unsigned long crc)
-{
- copy_le32(header->crc32, crc);
- copy_le32(header->compressed_size, compressed_size);
- copy_le32(header->size, size);
+ if (size >= 0xffffffff || compressed_size >= 0xffffffff) {
+ struct zip64_data_desc trailer;
+ copy_le32(trailer.magic, 0x08074b50);
+ copy_le32(trailer.crc32, crc);
+ copy_le64(trailer.compressed_size, compressed_size);
+ copy_le64(trailer.size, size);
+ write_or_die(1, &trailer, ZIP64_DATA_DESC_SIZE);
+ zip_offset += ZIP64_DATA_DESC_SIZE;
+ } else {
+ struct zip_data_desc trailer;
+ copy_le32(trailer.magic, 0x08074b50);
+ copy_le32(trailer.crc32, crc);
+ copy_le32(trailer.compressed_size, compressed_size);
+ copy_le32(trailer.size, size);
+ write_or_die(1, &trailer, ZIP_DATA_DESC_SIZE);
+ zip_offset += ZIP_DATA_DESC_SIZE;
+ }
}
static void set_zip_header_data_desc(struct zip_local_header *header,
unsigned int mode)
{
struct zip_local_header header;
- struct zip_dir_header dirent;
+ uintmax_t offset = zip_offset;
struct zip_extra_mtime extra;
+ struct zip64_extra extra64;
+ size_t header_extra_size = ZIP_EXTRA_MTIME_SIZE;
+ int need_zip64_extra = 0;
unsigned long attr2;
unsigned long compressed_size;
unsigned long crc;
- unsigned long direntsize;
int method;
unsigned char *out;
void *deflated = NULL;
int is_binary = -1;
const char *path_without_prefix = path + args->baselen;
unsigned int creator_version = 0;
+ unsigned int version_needed = 10;
+ size_t zip_dir_extra_size = ZIP_EXTRA_MTIME_SIZE;
+ size_t zip64_dir_extra_payload_size = 0;
crc = crc32(0, NULL, 0);
extra.flags[0] = 1; /* just mtime */
copy_le32(extra.mtime, args->time);
- /* make sure we have enough free space in the dictionary */
- direntsize = ZIP_DIR_HEADER_SIZE + pathlen + ZIP_EXTRA_MTIME_SIZE;
- while (zip_dir_size < zip_dir_offset + direntsize) {
- zip_dir_size += ZIP_DIRECTORY_MIN_SIZE;
- zip_dir = xrealloc(zip_dir, zip_dir_size);
- }
+ if (size > 0xffffffff || compressed_size > 0xffffffff)
+ need_zip64_extra = 1;
+ if (stream && size > 0x7fffffff)
+ need_zip64_extra = 1;
- copy_le32(dirent.magic, 0x02014b50);
- copy_le16(dirent.creator_version, creator_version);
- copy_le16(dirent.version, 10);
- copy_le16(dirent.flags, flags);
- copy_le16(dirent.compression_method, method);
- copy_le16(dirent.mtime, zip_time);
- copy_le16(dirent.mdate, zip_date);
- set_zip_dir_data_desc(&dirent, size, compressed_size, crc);
- copy_le16(dirent.filename_length, pathlen);
- copy_le16(dirent.extra_length, ZIP_EXTRA_MTIME_SIZE);
- copy_le16(dirent.comment_length, 0);
- copy_le16(dirent.disk, 0);
- copy_le32(dirent.attr2, attr2);
- copy_le32(dirent.offset, zip_offset);
+ if (need_zip64_extra)
+ version_needed = 45;
copy_le32(header.magic, 0x04034b50);
- copy_le16(header.version, 10);
+ copy_le16(header.version, version_needed);
copy_le16(header.flags, flags);
copy_le16(header.compression_method, method);
copy_le16(header.mtime, zip_time);
copy_le16(header.mdate, zip_date);
- set_zip_header_data_desc(&header, size, compressed_size, crc);
+ if (need_zip64_extra) {
+ set_zip_header_data_desc(&header, 0xffffffff, 0xffffffff, crc);
+ header_extra_size += ZIP64_EXTRA_SIZE;
+ } else {
+ set_zip_header_data_desc(&header, size, compressed_size, crc);
+ }
copy_le16(header.filename_length, pathlen);
- copy_le16(header.extra_length, ZIP_EXTRA_MTIME_SIZE);
+ copy_le16(header.extra_length, header_extra_size);
write_or_die(1, &header, ZIP_LOCAL_HEADER_SIZE);
zip_offset += ZIP_LOCAL_HEADER_SIZE;
write_or_die(1, path, pathlen);
zip_offset += pathlen;
write_or_die(1, &extra, ZIP_EXTRA_MTIME_SIZE);
zip_offset += ZIP_EXTRA_MTIME_SIZE;
+ if (need_zip64_extra) {
+ copy_le16(extra64.magic, 0x0001);
+ copy_le16(extra64.extra_size, ZIP64_EXTRA_PAYLOAD_SIZE);
+ copy_le64(extra64.size, size);
+ copy_le64(extra64.compressed_size, compressed_size);
+ write_or_die(1, &extra64, ZIP64_EXTRA_SIZE);
+ zip_offset += ZIP64_EXTRA_SIZE;
+ }
+
if (stream && method == 0) {
unsigned char buf[STREAM_BUFFER_SIZE];
ssize_t readlen;
zip_offset += compressed_size;
write_zip_data_desc(size, compressed_size, crc);
- zip_offset += ZIP_DATA_DESC_SIZE;
-
- set_zip_dir_data_desc(&dirent, size, compressed_size, crc);
} else if (stream && method == 8) {
unsigned char buf[STREAM_BUFFER_SIZE];
ssize_t readlen;
zip_offset += compressed_size;
write_zip_data_desc(size, compressed_size, crc);
- zip_offset += ZIP_DATA_DESC_SIZE;
-
- set_zip_dir_data_desc(&dirent, size, compressed_size, crc);
} else if (compressed_size > 0) {
write_or_die(1, out, compressed_size);
zip_offset += compressed_size;
free(deflated);
free(buffer);
- copy_le16(dirent.attr1, !is_binary);
+ if (compressed_size > 0xffffffff || size > 0xffffffff ||
+ offset > 0xffffffff) {
+ if (compressed_size >= 0xffffffff)
+ zip64_dir_extra_payload_size += 8;
+ if (size >= 0xffffffff)
+ zip64_dir_extra_payload_size += 8;
+ if (offset >= 0xffffffff)
+ zip64_dir_extra_payload_size += 8;
+ zip_dir_extra_size += 2 + 2 + zip64_dir_extra_payload_size;
+ }
- memcpy(zip_dir + zip_dir_offset, &dirent, ZIP_DIR_HEADER_SIZE);
- zip_dir_offset += ZIP_DIR_HEADER_SIZE;
- memcpy(zip_dir + zip_dir_offset, path, pathlen);
- zip_dir_offset += pathlen;
- memcpy(zip_dir + zip_dir_offset, &extra, ZIP_EXTRA_MTIME_SIZE);
- zip_dir_offset += ZIP_EXTRA_MTIME_SIZE;
+ strbuf_add_le(&zip_dir, 4, 0x02014b50); /* magic */
+ strbuf_add_le(&zip_dir, 2, creator_version);
+ strbuf_add_le(&zip_dir, 2, version_needed);
+ strbuf_add_le(&zip_dir, 2, flags);
+ strbuf_add_le(&zip_dir, 2, method);
+ strbuf_add_le(&zip_dir, 2, zip_time);
+ strbuf_add_le(&zip_dir, 2, zip_date);
+ strbuf_add_le(&zip_dir, 4, crc);
+ strbuf_add_le(&zip_dir, 4, clamp32(compressed_size));
+ strbuf_add_le(&zip_dir, 4, clamp32(size));
+ strbuf_add_le(&zip_dir, 2, pathlen);
+ strbuf_add_le(&zip_dir, 2, zip_dir_extra_size);
+ strbuf_add_le(&zip_dir, 2, 0); /* comment length */
+ strbuf_add_le(&zip_dir, 2, 0); /* disk */
+ strbuf_add_le(&zip_dir, 2, !is_binary);
+ strbuf_add_le(&zip_dir, 4, attr2);
+ strbuf_add_le(&zip_dir, 4, clamp32(offset));
+ strbuf_add(&zip_dir, path, pathlen);
+ strbuf_add(&zip_dir, &extra, ZIP_EXTRA_MTIME_SIZE);
+ if (zip64_dir_extra_payload_size) {
+ strbuf_add_le(&zip_dir, 2, 0x0001); /* magic */
+ strbuf_add_le(&zip_dir, 2, zip64_dir_extra_payload_size);
+ if (size >= 0xffffffff)
+ strbuf_add_le(&zip_dir, 8, size);
+ if (compressed_size >= 0xffffffff)
+ strbuf_add_le(&zip_dir, 8, compressed_size);
+ if (offset >= 0xffffffff)
+ strbuf_add_le(&zip_dir, 8, offset);
+ }
zip_dir_entries++;
return 0;
copy_le32(trailer64.directory_start_disk, 0);
copy_le64(trailer64.entries_on_this_disk, zip_dir_entries);
copy_le64(trailer64.entries, zip_dir_entries);
- copy_le64(trailer64.size, zip_dir_offset);
+ copy_le64(trailer64.size, zip_dir.len);
copy_le64(trailer64.offset, zip_offset);
copy_le32(locator64.magic, 0x07064b50);
copy_le32(locator64.disk, 0);
- copy_le64(locator64.offset, zip_offset + zip_dir_offset);
+ copy_le64(locator64.offset, zip_offset + zip_dir.len);
copy_le32(locator64.number_of_disks, 1);
write_or_die(1, &trailer64, ZIP64_DIR_TRAILER_SIZE);
copy_le16_clamp(trailer.entries_on_this_disk, zip_dir_entries,
&clamped);
copy_le16_clamp(trailer.entries, zip_dir_entries, &clamped);
- copy_le32(trailer.size, zip_dir_offset);
- copy_le32(trailer.offset, zip_offset);
+ copy_le32(trailer.size, zip_dir.len);
+ copy_le32_clamp(trailer.offset, zip_offset, &clamped);
copy_le16(trailer.comment_length, sha1 ? GIT_SHA1_HEXSZ : 0);
- write_or_die(1, zip_dir, zip_dir_offset);
+ write_or_die(1, zip_dir.buf, zip_dir.len);
if (clamped)
write_zip64_trailer();
write_or_die(1, &trailer, ZIP_DIR_TRAILER_SIZE);
dos_time(&args->time, &zip_date, &zip_time);
- zip_dir = xmalloc(ZIP_DIRECTORY_MIN_SIZE);
- zip_dir_size = ZIP_DIRECTORY_MIN_SIZE;
+ strbuf_init(&zip_dir, 0);
err = write_archive_entries(args, write_zip_entry);
if (!err)
write_zip_trailer(args->commit_sha1);
- free(zip_dir);
+ strbuf_release(&zip_dir);
return err;
}