CMake/Utilities/cmlibarchive/libarchive/archive_write_set_format_zip.c

931 lines
27 KiB
C

/*-
* Copyright (c) 2008 Anselm Strauss
* Copyright (c) 2009 Joerg Sonnenberger
* Copyright (c) 2011-2012 Michihiro NAKAJIMA
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Development supported by Google Summer of Code 2008.
*/
/*
* The current implementation is very limited:
*
* - No encryption support.
* - No ZIP64 support.
* - No support for splitting and spanning.
* - Only supports regular file and folder entries.
*
* Note that generally data in ZIP files is little-endian encoded,
* with some exceptions.
*
* TODO: Since Libarchive is generally 64bit oriented, but this implementation
* does not yet support sizes exceeding 32bit, it is highly fragile for
* big archives. This should change when ZIP64 is finally implemented, otherwise
* some serious checking has to be done.
*
*/
#include "archive_platform.h"
__FBSDID("$FreeBSD: head/lib/libarchive/archive_write_set_format_zip.c 201168 2009-12-29 06:15:32Z kientzle $");
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_LANGINFO_H
#include <langinfo.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_ZLIB_H
#include <cm_zlib.h>
#endif
#include "archive.h"
#include "archive_endian.h"
#include "archive_entry.h"
#include "archive_entry_locale.h"
#include "archive_private.h"
#include "archive_write_private.h"
#ifndef HAVE_ZLIB_H
#include "archive_crc32.h"
#endif
#define ZIP_SIGNATURE_LOCAL_FILE_HEADER 0x04034b50
#define ZIP_SIGNATURE_DATA_DESCRIPTOR 0x08074b50
#define ZIP_SIGNATURE_FILE_HEADER 0x02014b50
#define ZIP_SIGNATURE_CENTRAL_DIRECTORY_END 0x06054b50
#define ZIP_SIGNATURE_EXTRA_TIMESTAMP 0x5455
#define ZIP_SIGNATURE_EXTRA_NEW_UNIX 0x7875
#define ZIP_VERSION_EXTRACT 0x0014 /* ZIP version 2.0 is needed. */
#define ZIP_VERSION_BY 0x0314 /* Made by UNIX, using ZIP version 2.0. */
#define ZIP_FLAGS 0x08 /* Flagging bit 3 (count from 0) for using data descriptor. */
#define ZIP_FLAGS_UTF8_NAME (1 << 11)
enum compression {
COMPRESSION_STORE = 0
#ifdef HAVE_ZLIB_H
,
COMPRESSION_DEFLATE = 8
#endif
};
static ssize_t archive_write_zip_data(struct archive_write *,
const void *buff, size_t s);
static int archive_write_zip_close(struct archive_write *);
static int archive_write_zip_free(struct archive_write *);
static int archive_write_zip_finish_entry(struct archive_write *);
static int archive_write_zip_header(struct archive_write *,
struct archive_entry *);
static int archive_write_zip_options(struct archive_write *,
const char *, const char *);
static unsigned int dos_time(const time_t);
static size_t path_length(struct archive_entry *);
static int write_path(struct archive_entry *, struct archive_write *);
#define LOCAL_FILE_HEADER_SIGNATURE 0
#define LOCAL_FILE_HEADER_VERSION 4
#define LOCAL_FILE_HEADER_FLAGS 6
#define LOCAL_FILE_HEADER_COMPRESSION 8
#define LOCAL_FILE_HEADER_TIMEDATE 10
#define LOCAL_FILE_HEADER_CRC32 14
#define LOCAL_FILE_HEADER_COMPRESSED_SIZE 18
#define LOCAL_FILE_HEADER_UNCOMPRESSED_SIZE 22
#define LOCAL_FILE_HEADER_FILENAME_LENGTH 26
#define LOCAL_FILE_HEADER_EXTRA_LENGTH 28
#define SIZE_LOCAL_FILE_HEADER 30
#define FILE_HEADER_SIGNATURE 0
#define FILE_HEADER_VERSION_BY 4
#define FILE_HEADER_VERSION_EXTRACT 6
#define FILE_HEADER_FLAGS 8
#define FILE_HEADER_COMPRESSION 10
#define FILE_HEADER_TIMEDATE 12
#define FILE_HEADER_CRC32 16
#define FILE_HEADER_COMPRESSED_SIZE 20
#define FILE_HEADER_UNCOMPRESSED_SIZE 24
#define FILE_HEADER_FILENAME_LENGTH 28
#define FILE_HEADER_EXTRA_LENGTH 30
#define FILE_HEADER_COMMENT_LENGTH 32
#define FILE_HEADER_DISK_NUMBER 34
#define FILE_HEADER_ATTRIBUTES_INTERNAL 36
#define FILE_HEADER_ATTRIBUTES_EXTERNAL 38
#define FILE_HEADER_OFFSET 42
#define SIZE_FILE_HEADER 46
/* Not mandatory, but recommended by specification. */
#define DATA_DESCRIPTOR_SIGNATURE 0
#define DATA_DESCRIPTOR_CRC32 4
#define DATA_DESCRIPTOR_COMPRESSED_SIZE 8
#define DATA_DESCRIPTOR_UNCOMPRESSED_SIZE 12
#define SIZE_DATA_DESCRIPTOR 16
#define EXTRA_DATA_LOCAL_TIME_ID 0
#define EXTRA_DATA_LOCAL_TIME_SIZE 2
#define EXTRA_DATA_LOCAL_TIME_FLAG 4
#define EXTRA_DATA_LOCAL_MTIME 5
#define EXTRA_DATA_LOCAL_ATIME 9
#define EXTRA_DATA_LOCAL_CTIME 13
#define EXTRA_DATA_LOCAL_UNIX_ID 17
#define EXTRA_DATA_LOCAL_UNIX_SIZE 19
#define EXTRA_DATA_LOCAL_UNIX_VERSION 21
#define EXTRA_DATA_LOCAL_UNIX_UID_SIZE 22
#define EXTRA_DATA_LOCAL_UNIX_UID 23
#define EXTRA_DATA_LOCAL_UNIX_GID_SIZE 27
#define EXTRA_DATA_LOCAL_UNIX_GID 28
#define SIZE_EXTRA_DATA_LOCAL 32
#define EXTRA_DATA_CENTRAL_TIME_ID 0
#define EXTRA_DATA_CENTRAL_TIME_SIZE 2
#define EXTRA_DATA_CENTRAL_TIME_FLAG 4
#define EXTRA_DATA_CENTRAL_MTIME 5
#define EXTRA_DATA_CENTRAL_UNIX_ID 9
#define EXTRA_DATA_CENTRAL_UNIX_SIZE 11
#define SIZE_EXTRA_DATA_CENTRAL 13
#define CENTRAL_DIRECTORY_END_SIGNATURE 0
#define CENTRAL_DIRECTORY_END_DISK 4
#define CENTRAL_DIRECTORY_END_START_DISK 6
#define CENTRAL_DIRECTORY_END_ENTRIES_DISK 8
#define CENTRAL_DIRECTORY_END_ENTRIES 10
#define CENTRAL_DIRECTORY_END_SIZE 12
#define CENTRAL_DIRECTORY_END_OFFSET 16
#define CENTRAL_DIRECTORY_END_COMMENT_LENGTH 20
#define SIZE_CENTRAL_DIRECTORY_END 22
struct zip_file_header_link {
struct zip_file_header_link *next;
struct archive_entry *entry;
int64_t offset;
unsigned long crc32;
int64_t compressed_size;
enum compression compression;
int flags;
};
struct zip {
uint8_t data_descriptor[SIZE_DATA_DESCRIPTOR];
struct zip_file_header_link *central_directory;
struct zip_file_header_link *central_directory_end;
int64_t offset;
int64_t written_bytes;
int64_t remaining_data_bytes;
enum compression compression;
int flags;
struct archive_string_conv *opt_sconv;
struct archive_string_conv *sconv_default;
int init_default_conversion;
#ifdef HAVE_ZLIB_H
z_stream stream;
size_t len_buf;
unsigned char *buf;
#endif
};
static int
archive_write_zip_options(struct archive_write *a, const char *key,
const char *val)
{
struct zip *zip = a->format_data;
int ret = ARCHIVE_FAILED;
if (strcmp(key, "compression") == 0) {
if (val == NULL || val[0] == 0) {
archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
"%s: compression option needs a compression name",
a->format_name);
} else if (strcmp(val, "deflate") == 0) {
#ifdef HAVE_ZLIB_H
zip->compression = COMPRESSION_DEFLATE;
ret = ARCHIVE_OK;
#else
archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
"deflate compression not supported");
#endif
} else if (strcmp(val, "store") == 0) {
zip->compression = COMPRESSION_STORE;
ret = ARCHIVE_OK;
}
return (ret);
} else if (strcmp(key, "hdrcharset") == 0) {
if (val == NULL || val[0] == 0) {
archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
"%s: hdrcharset option needs a character-set name",
a->format_name);
} else {
zip->opt_sconv = archive_string_conversion_to_charset(
&a->archive, val, 0);
if (zip->opt_sconv != NULL)
ret = ARCHIVE_OK;
else
ret = ARCHIVE_FATAL;
}
return (ret);
}
/* Note: The "warn" return is just to inform the options
* supervisor that we didn't handle it. It will generate
* a suitable error if no one used this option. */
return (ARCHIVE_WARN);
}
int
archive_write_zip_set_compression_deflate(struct archive *_a)
{
struct archive_write *a = (struct archive_write *)_a;
int ret = ARCHIVE_FAILED;
archive_check_magic(_a, ARCHIVE_WRITE_MAGIC,
ARCHIVE_STATE_NEW | ARCHIVE_STATE_HEADER,
"archive_write_zip_set_compression_deflate");
if (a->archive.archive_format != ARCHIVE_FORMAT_ZIP) {
archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
"Can only use archive_write_zip_set_compression_deflate"
" with zip format");
ret = ARCHIVE_FATAL;
} else {
#ifdef HAVE_ZLIB_H
struct zip *zip = a->format_data;
zip->compression = COMPRESSION_DEFLATE;
ret = ARCHIVE_OK;
#else
archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
"deflate compression not supported");
#endif
}
return (ret);
}
int
archive_write_zip_set_compression_store(struct archive *_a)
{
struct archive_write *a = (struct archive_write *)_a;
struct zip *zip = a->format_data;
int ret = ARCHIVE_FAILED;
archive_check_magic(_a, ARCHIVE_WRITE_MAGIC,
ARCHIVE_STATE_NEW | ARCHIVE_STATE_HEADER,
"archive_write_zip_set_compression_deflate");
if (a->archive.archive_format != ARCHIVE_FORMAT_ZIP) {
archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
"Can only use archive_write_zip_set_compression_store"
" with zip format");
ret = ARCHIVE_FATAL;
} else {
zip->compression = COMPRESSION_STORE;
ret = ARCHIVE_OK;
}
return (ret);
}
int
archive_write_set_format_zip(struct archive *_a)
{
struct archive_write *a = (struct archive_write *)_a;
struct zip *zip;
archive_check_magic(_a, ARCHIVE_WRITE_MAGIC,
ARCHIVE_STATE_NEW, "archive_write_set_format_zip");
/* If another format was already registered, unregister it. */
if (a->format_free != NULL)
(a->format_free)(a);
zip = (struct zip *) calloc(1, sizeof(*zip));
if (zip == NULL) {
archive_set_error(&a->archive, ENOMEM,
"Can't allocate zip data");
return (ARCHIVE_FATAL);
}
zip->central_directory = NULL;
zip->central_directory_end = NULL;
zip->offset = 0;
zip->written_bytes = 0;
zip->remaining_data_bytes = 0;
#ifdef HAVE_ZLIB_H
zip->compression = COMPRESSION_DEFLATE;
zip->len_buf = 65536;
zip->buf = malloc(zip->len_buf);
if (zip->buf == NULL) {
free(zip);
archive_set_error(&a->archive, ENOMEM,
"Can't allocate compression buffer");
return (ARCHIVE_FATAL);
}
#else
zip->compression = COMPRESSION_STORE;
#endif
a->format_data = zip;
a->format_name = "zip";
a->format_options = archive_write_zip_options;
a->format_write_header = archive_write_zip_header;
a->format_write_data = archive_write_zip_data;
a->format_finish_entry = archive_write_zip_finish_entry;
a->format_close = archive_write_zip_close;
a->format_free = archive_write_zip_free;
a->archive.archive_format = ARCHIVE_FORMAT_ZIP;
a->archive.archive_format_name = "ZIP";
archive_le32enc(&zip->data_descriptor[DATA_DESCRIPTOR_SIGNATURE],
ZIP_SIGNATURE_DATA_DESCRIPTOR);
return (ARCHIVE_OK);
}
static int
is_all_ascii(const char *p)
{
const unsigned char *pp = (const unsigned char *)p;
while (*pp) {
if (*pp++ > 127)
return (0);
}
return (1);
}
static int
archive_write_zip_header(struct archive_write *a, struct archive_entry *entry)
{
struct zip *zip;
uint8_t h[SIZE_LOCAL_FILE_HEADER];
uint8_t e[SIZE_EXTRA_DATA_LOCAL];
uint8_t *d;
struct zip_file_header_link *l;
struct archive_string_conv *sconv;
int ret, ret2 = ARCHIVE_OK;
int64_t size;
mode_t type;
/* Entries other than a regular file or a folder are skipped. */
type = archive_entry_filetype(entry);
if (type != AE_IFREG && type != AE_IFDIR && type != AE_IFLNK) {
archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
"Filetype not supported");
return ARCHIVE_FAILED;
};
/* Directory entries should have a size of 0. */
if (type == AE_IFDIR)
archive_entry_set_size(entry, 0);
zip = a->format_data;
/* Setup default conversion. */
if (zip->opt_sconv == NULL && !zip->init_default_conversion) {
zip->sconv_default =
archive_string_default_conversion_for_write(&(a->archive));
zip->init_default_conversion = 1;
}
if (zip->flags == 0) {
/* Initialize the general purpose flags. */
zip->flags = ZIP_FLAGS;
if (zip->opt_sconv != NULL) {
if (strcmp(archive_string_conversion_charset_name(
zip->opt_sconv), "UTF-8") == 0)
zip->flags |= ZIP_FLAGS_UTF8_NAME;
#if HAVE_NL_LANGINFO
} else if (strcmp(nl_langinfo(CODESET), "UTF-8") == 0) {
zip->flags |= ZIP_FLAGS_UTF8_NAME;
#endif
}
}
d = zip->data_descriptor;
size = archive_entry_size(entry);
zip->remaining_data_bytes = size;
/* Append archive entry to the central directory data. */
l = (struct zip_file_header_link *) malloc(sizeof(*l));
if (l == NULL) {
archive_set_error(&a->archive, ENOMEM,
"Can't allocate zip header data");
return (ARCHIVE_FATAL);
}
#if defined(_WIN32) && !defined(__CYGWIN__)
/* Make sure the path separators in pahtname, hardlink and symlink
* are all slash '/', not the Windows path separator '\'. */
l->entry = __la_win_entry_in_posix_pathseparator(entry);
if (l->entry == entry)
l->entry = archive_entry_clone(entry);
#else
l->entry = archive_entry_clone(entry);
#endif
if (l->entry == NULL) {
archive_set_error(&a->archive, ENOMEM,
"Can't allocate zip header data");
free(l);
return (ARCHIVE_FATAL);
}
l->flags = zip->flags;
if (zip->opt_sconv != NULL)
sconv = zip->opt_sconv;
else
sconv = zip->sconv_default;
if (sconv != NULL) {
const char *p;
size_t len;
if (archive_entry_pathname_l(entry, &p, &len, sconv) != 0) {
if (errno == ENOMEM) {
archive_entry_free(l->entry);
free(l);
archive_set_error(&a->archive, ENOMEM,
"Can't allocate memory for Pathname");
return (ARCHIVE_FATAL);
}
archive_set_error(&a->archive,
ARCHIVE_ERRNO_FILE_FORMAT,
"Can't translate Pathname '%s' to %s",
archive_entry_pathname(entry),
archive_string_conversion_charset_name(sconv));
ret2 = ARCHIVE_WARN;
}
if (len > 0)
archive_entry_set_pathname(l->entry, p);
/*
* Although there is no character-set regulation for Symlink,
* it is suitable to convert a character-set of Symlinke to
* what those of the Pathname has been converted to.
*/
if (type == AE_IFLNK) {
if (archive_entry_symlink_l(entry, &p, &len, sconv)) {
if (errno == ENOMEM) {
archive_entry_free(l->entry);
free(l);
archive_set_error(&a->archive, ENOMEM,
"Can't allocate memory "
" for Symlink");
return (ARCHIVE_FATAL);
}
/*
* Even if the strng conversion failed,
* we should not report the error since
* thre is no regulation for.
*/
} else if (len > 0)
archive_entry_set_symlink(l->entry, p);
}
}
/* If all characters in a filename are ASCII, Reset UTF-8 Name flag. */
if ((l->flags & ZIP_FLAGS_UTF8_NAME) != 0 &&
is_all_ascii(archive_entry_pathname(l->entry)))
l->flags &= ~ZIP_FLAGS_UTF8_NAME;
/* Initialize the CRC variable and potentially the local crc32(). */
l->crc32 = crc32(0, NULL, 0);
if (type == AE_IFLNK) {
const char *p = archive_entry_symlink(l->entry);
if (p != NULL)
size = strlen(p);
else
size = 0;
zip->remaining_data_bytes = 0;
archive_entry_set_size(l->entry, size);
l->compression = COMPRESSION_STORE;
l->compressed_size = size;
} else {
l->compression = zip->compression;
l->compressed_size = 0;
}
l->next = NULL;
if (zip->central_directory == NULL) {
zip->central_directory = l;
} else {
zip->central_directory_end->next = l;
}
zip->central_directory_end = l;
/* Store the offset of this header for later use in central
* directory. */
l->offset = zip->written_bytes;
memset(h, 0, sizeof(h));
archive_le32enc(&h[LOCAL_FILE_HEADER_SIGNATURE],
ZIP_SIGNATURE_LOCAL_FILE_HEADER);
archive_le16enc(&h[LOCAL_FILE_HEADER_VERSION], ZIP_VERSION_EXTRACT);
archive_le16enc(&h[LOCAL_FILE_HEADER_FLAGS], l->flags);
archive_le16enc(&h[LOCAL_FILE_HEADER_COMPRESSION], l->compression);
archive_le32enc(&h[LOCAL_FILE_HEADER_TIMEDATE],
dos_time(archive_entry_mtime(entry)));
archive_le16enc(&h[LOCAL_FILE_HEADER_FILENAME_LENGTH],
(uint16_t)path_length(l->entry));
switch (l->compression) {
case COMPRESSION_STORE:
/* Setting compressed and uncompressed sizes even when
* specification says to set to zero when using data
* descriptors. Otherwise the end of the data for an
* entry is rather difficult to find. */
archive_le32enc(&h[LOCAL_FILE_HEADER_COMPRESSED_SIZE],
(uint32_t)size);
archive_le32enc(&h[LOCAL_FILE_HEADER_UNCOMPRESSED_SIZE],
(uint32_t)size);
break;
#ifdef HAVE_ZLIB_H
case COMPRESSION_DEFLATE:
archive_le32enc(&h[LOCAL_FILE_HEADER_UNCOMPRESSED_SIZE],
(uint32_t)size);
zip->stream.zalloc = Z_NULL;
zip->stream.zfree = Z_NULL;
zip->stream.opaque = Z_NULL;
zip->stream.next_out = zip->buf;
zip->stream.avail_out = (uInt)zip->len_buf;
if (deflateInit2(&zip->stream, Z_DEFAULT_COMPRESSION,
Z_DEFLATED, -15, 8, Z_DEFAULT_STRATEGY) != Z_OK) {
archive_set_error(&a->archive, ENOMEM,
"Can't init deflate compressor");
return (ARCHIVE_FATAL);
}
break;
#endif
}
/* Formatting extra data. */
archive_le16enc(&h[LOCAL_FILE_HEADER_EXTRA_LENGTH], sizeof(e));
archive_le16enc(&e[EXTRA_DATA_LOCAL_TIME_ID],
ZIP_SIGNATURE_EXTRA_TIMESTAMP);
archive_le16enc(&e[EXTRA_DATA_LOCAL_TIME_SIZE], 1 + 4 * 3);
e[EXTRA_DATA_LOCAL_TIME_FLAG] = 0x07;
archive_le32enc(&e[EXTRA_DATA_LOCAL_MTIME],
(uint32_t)archive_entry_mtime(entry));
archive_le32enc(&e[EXTRA_DATA_LOCAL_ATIME],
(uint32_t)archive_entry_atime(entry));
archive_le32enc(&e[EXTRA_DATA_LOCAL_CTIME],
(uint32_t)archive_entry_ctime(entry));
archive_le16enc(&e[EXTRA_DATA_LOCAL_UNIX_ID],
ZIP_SIGNATURE_EXTRA_NEW_UNIX);
archive_le16enc(&e[EXTRA_DATA_LOCAL_UNIX_SIZE], 1 + (1 + 4) * 2);
e[EXTRA_DATA_LOCAL_UNIX_VERSION] = 1;
e[EXTRA_DATA_LOCAL_UNIX_UID_SIZE] = 4;
archive_le32enc(&e[EXTRA_DATA_LOCAL_UNIX_UID],
(uint32_t)archive_entry_uid(entry));
e[EXTRA_DATA_LOCAL_UNIX_GID_SIZE] = 4;
archive_le32enc(&e[EXTRA_DATA_LOCAL_UNIX_GID],
(uint32_t)archive_entry_gid(entry));
archive_le32enc(&d[DATA_DESCRIPTOR_UNCOMPRESSED_SIZE],
(uint32_t)size);
ret = __archive_write_output(a, h, sizeof(h));
if (ret != ARCHIVE_OK)
return (ARCHIVE_FATAL);
zip->written_bytes += sizeof(h);
ret = write_path(l->entry, a);
if (ret <= ARCHIVE_OK)
return (ARCHIVE_FATAL);
zip->written_bytes += ret;
ret = __archive_write_output(a, e, sizeof(e));
if (ret != ARCHIVE_OK)
return (ARCHIVE_FATAL);
zip->written_bytes += sizeof(e);
if (type == AE_IFLNK) {
const unsigned char *p;
p = (const unsigned char *)archive_entry_symlink(l->entry);
ret = __archive_write_output(a, p, (size_t)size);
if (ret != ARCHIVE_OK)
return (ARCHIVE_FATAL);
zip->written_bytes += size;
l->crc32 = crc32(l->crc32, p, (unsigned)size);
}
if (ret2 != ARCHIVE_OK)
return (ret2);
return (ARCHIVE_OK);
}
static ssize_t
archive_write_zip_data(struct archive_write *a, const void *buff, size_t s)
{
int ret;
struct zip *zip = a->format_data;
struct zip_file_header_link *l = zip->central_directory_end;
if ((int64_t)s > zip->remaining_data_bytes)
s = (size_t)zip->remaining_data_bytes;
if (s == 0) return 0;
switch (l->compression) {
case COMPRESSION_STORE:
ret = __archive_write_output(a, buff, s);
if (ret != ARCHIVE_OK) return (ret);
zip->written_bytes += s;
zip->remaining_data_bytes -= s;
l->compressed_size += s;
l->crc32 = crc32(l->crc32, buff, (unsigned)s);
return (s);
#if HAVE_ZLIB_H
case COMPRESSION_DEFLATE:
zip->stream.next_in = (unsigned char*)(uintptr_t)buff;
zip->stream.avail_in = (uInt)s;
do {
ret = deflate(&zip->stream, Z_NO_FLUSH);
if (ret == Z_STREAM_ERROR)
return (ARCHIVE_FATAL);
if (zip->stream.avail_out == 0) {
ret = __archive_write_output(a, zip->buf,
zip->len_buf);
if (ret != ARCHIVE_OK)
return (ret);
l->compressed_size += zip->len_buf;
zip->written_bytes += zip->len_buf;
zip->stream.next_out = zip->buf;
zip->stream.avail_out = (uInt)zip->len_buf;
}
} while (zip->stream.avail_in != 0);
zip->remaining_data_bytes -= s;
/* If we have it, use zlib's fast crc32() */
l->crc32 = crc32(l->crc32, buff, (uInt)s);
return (s);
#endif
default:
archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
"Invalid ZIP compression type");
return ARCHIVE_FATAL;
}
}
static int
archive_write_zip_finish_entry(struct archive_write *a)
{
/* Write the data descripter after file data has been written. */
int ret;
struct zip *zip = a->format_data;
uint8_t *d = zip->data_descriptor;
struct zip_file_header_link *l = zip->central_directory_end;
#if HAVE_ZLIB_H
size_t reminder;
#endif
switch(l->compression) {
case COMPRESSION_STORE:
break;
#if HAVE_ZLIB_H
case COMPRESSION_DEFLATE:
for (;;) {
ret = deflate(&zip->stream, Z_FINISH);
if (ret == Z_STREAM_ERROR)
return (ARCHIVE_FATAL);
reminder = zip->len_buf - zip->stream.avail_out;
ret = __archive_write_output(a, zip->buf, reminder);
if (ret != ARCHIVE_OK)
return (ret);
l->compressed_size += reminder;
zip->written_bytes += reminder;
zip->stream.next_out = zip->buf;
if (zip->stream.avail_out != 0)
break;
zip->stream.avail_out = (uInt)zip->len_buf;
}
deflateEnd(&zip->stream);
break;
#endif
}
archive_le32enc(&d[DATA_DESCRIPTOR_CRC32], l->crc32);
archive_le32enc(&d[DATA_DESCRIPTOR_COMPRESSED_SIZE],
(uint32_t)l->compressed_size);
ret = __archive_write_output(a, d, SIZE_DATA_DESCRIPTOR);
if (ret != ARCHIVE_OK)
return (ARCHIVE_FATAL);
zip->written_bytes += SIZE_DATA_DESCRIPTOR;
return (ARCHIVE_OK);
}
static int
archive_write_zip_close(struct archive_write *a)
{
struct zip *zip;
struct zip_file_header_link *l;
uint8_t h[SIZE_FILE_HEADER];
uint8_t end[SIZE_CENTRAL_DIRECTORY_END];
uint8_t e[SIZE_EXTRA_DATA_CENTRAL];
int64_t offset_start, offset_end;
int entries;
int ret;
zip = a->format_data;
l = zip->central_directory;
/*
* Formatting central directory file header fields that are
* fixed for all entries.
* Fields not used (and therefor 0) are:
*
* - comment_length
* - disk_number
* - attributes_internal
*/
memset(h, 0, sizeof(h));
archive_le32enc(&h[FILE_HEADER_SIGNATURE], ZIP_SIGNATURE_FILE_HEADER);
archive_le16enc(&h[FILE_HEADER_VERSION_BY], ZIP_VERSION_BY);
archive_le16enc(&h[FILE_HEADER_VERSION_EXTRACT], ZIP_VERSION_EXTRACT);
entries = 0;
offset_start = zip->written_bytes;
/* Formatting individual header fields per entry and
* writing each entry. */
while (l != NULL) {
archive_le16enc(&h[FILE_HEADER_FLAGS], l->flags);
archive_le16enc(&h[FILE_HEADER_COMPRESSION], l->compression);
archive_le32enc(&h[FILE_HEADER_TIMEDATE],
dos_time(archive_entry_mtime(l->entry)));
archive_le32enc(&h[FILE_HEADER_CRC32], l->crc32);
archive_le32enc(&h[FILE_HEADER_COMPRESSED_SIZE],
(uint32_t)l->compressed_size);
archive_le32enc(&h[FILE_HEADER_UNCOMPRESSED_SIZE],
(uint32_t)archive_entry_size(l->entry));
archive_le16enc(&h[FILE_HEADER_FILENAME_LENGTH],
(uint16_t)path_length(l->entry));
archive_le16enc(&h[FILE_HEADER_EXTRA_LENGTH], sizeof(e));
archive_le16enc(&h[FILE_HEADER_ATTRIBUTES_EXTERNAL+2],
archive_entry_mode(l->entry));
archive_le32enc(&h[FILE_HEADER_OFFSET], (uint32_t)l->offset);
/* Formatting extra data. */
archive_le16enc(&e[EXTRA_DATA_CENTRAL_TIME_ID],
ZIP_SIGNATURE_EXTRA_TIMESTAMP);
archive_le16enc(&e[EXTRA_DATA_CENTRAL_TIME_SIZE], 1 + 4);
e[EXTRA_DATA_CENTRAL_TIME_FLAG] = 0x07;
archive_le32enc(&e[EXTRA_DATA_CENTRAL_MTIME],
(uint32_t)archive_entry_mtime(l->entry));
archive_le16enc(&e[EXTRA_DATA_CENTRAL_UNIX_ID],
ZIP_SIGNATURE_EXTRA_NEW_UNIX);
archive_le16enc(&e[EXTRA_DATA_CENTRAL_UNIX_SIZE], 0x0000);
ret = __archive_write_output(a, h, sizeof(h));
if (ret != ARCHIVE_OK)
return (ARCHIVE_FATAL);
zip->written_bytes += sizeof(h);
ret = write_path(l->entry, a);
if (ret <= ARCHIVE_OK)
return (ARCHIVE_FATAL);
zip->written_bytes += ret;
ret = __archive_write_output(a, e, sizeof(e));
if (ret != ARCHIVE_OK)
return (ARCHIVE_FATAL);
zip->written_bytes += sizeof(e);
l = l->next;
entries++;
}
offset_end = zip->written_bytes;
/* Formatting end of central directory. */
memset(end, 0, sizeof(end));
archive_le32enc(&end[CENTRAL_DIRECTORY_END_SIGNATURE],
ZIP_SIGNATURE_CENTRAL_DIRECTORY_END);
archive_le16enc(&end[CENTRAL_DIRECTORY_END_ENTRIES_DISK], entries);
archive_le16enc(&end[CENTRAL_DIRECTORY_END_ENTRIES], entries);
archive_le32enc(&end[CENTRAL_DIRECTORY_END_SIZE],
(uint32_t)(offset_end - offset_start));
archive_le32enc(&end[CENTRAL_DIRECTORY_END_OFFSET],
(uint32_t)offset_start);
/* Writing end of central directory. */
ret = __archive_write_output(a, end, sizeof(end));
if (ret != ARCHIVE_OK)
return (ARCHIVE_FATAL);
zip->written_bytes += sizeof(end);
return (ARCHIVE_OK);
}
static int
archive_write_zip_free(struct archive_write *a)
{
struct zip *zip;
struct zip_file_header_link *l;
zip = a->format_data;
while (zip->central_directory != NULL) {
l = zip->central_directory;
zip->central_directory = l->next;
archive_entry_free(l->entry);
free(l);
}
#ifdef HAVE_ZLIB_H
free(zip->buf);
#endif
free(zip);
a->format_data = NULL;
return (ARCHIVE_OK);
}
/* Convert into MSDOS-style date/time. */
static unsigned int
dos_time(const time_t unix_time)
{
struct tm *t;
unsigned int dt;
/* This will not preserve time when creating/extracting the archive
* on two systems with different time zones. */
t = localtime(&unix_time);
/* MSDOS-style date/time is only between 1980-01-01 and 2107-12-31 */
if (t->tm_year < 1980 - 1900)
/* Set minimum date/time '1980-01-01 00:00:00'. */
dt = 0x00210000U;
else if (t->tm_year > 2107 - 1900)
/* Set maximum date/time '2107-12-31 23:59:58'. */
dt = 0xff9fbf7dU;
else {
dt = 0;
dt += ((t->tm_year - 80) & 0x7f) << 9;
dt += ((t->tm_mon + 1) & 0x0f) << 5;
dt += (t->tm_mday & 0x1f);
dt <<= 16;
dt += (t->tm_hour & 0x1f) << 11;
dt += (t->tm_min & 0x3f) << 5;
dt += (t->tm_sec & 0x3e) >> 1; /* Only counting every 2 seconds. */
}
return dt;
}
static size_t
path_length(struct archive_entry *entry)
{
mode_t type;
const char *path;
type = archive_entry_filetype(entry);
path = archive_entry_pathname(entry);
if (path == NULL)
return (0);
if (type == AE_IFDIR &&
(path[0] == '\0' || path[strlen(path) - 1] != '/')) {
return strlen(path) + 1;
} else {
return strlen(path);
}
}
static int
write_path(struct archive_entry *entry, struct archive_write *archive)
{
int ret;
const char *path;
mode_t type;
size_t written_bytes;
path = archive_entry_pathname(entry);
type = archive_entry_filetype(entry);
written_bytes = 0;
ret = __archive_write_output(archive, path, strlen(path));
if (ret != ARCHIVE_OK)
return (ARCHIVE_FATAL);
written_bytes += strlen(path);
/* Folders are recognized by a traling slash. */
if ((type == AE_IFDIR) & (path[strlen(path) - 1] != '/')) {
ret = __archive_write_output(archive, "/", 1);
if (ret != ARCHIVE_OK)
return (ARCHIVE_FATAL);
written_bytes += 1;
}
return ((int)written_bytes);
}