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chromium / external / github.com / nmoinvaz / minizip / fe5fedc365f7824ada0cf9a84fb79b30d5fc97a8 / . / mz_zip.c
blob: 8308c8a1590abc166ff93fd857d78390d3df7fe1 [file] [log] [blame]
/* zip.c -- Zip manipulation
part of the minizip-ng project
Copyright (C) Nathan Moinvaziri
https://github.com/zlib-ng/minizip-ng
Copyright (C) 2009-2010 Mathias Svensson
Modifications for Zip64 support
http://result42.com
Copyright (C) 2007-2008 Even Rouault
Modifications of Unzip for Zip64
Copyright (C) 1998-2010 Gilles Vollant
https://www.winimage.com/zLibDll/minizip.html
This program is distributed under the terms of the same license as zlib.
See the accompanying LICENSE file for the full text of the license.
*/
#include "mz.h"
#include "mz_crypt.h"
#include "mz_strm.h"
#ifdef HAVE_BZIP2
# include "mz_strm_bzip.h"
#endif
#ifdef HAVE_LIBCOMP
# include "mz_strm_libcomp.h"
#endif
#ifdef HAVE_LZMA
# include "mz_strm_lzma.h"
#endif
#include "mz_strm_mem.h"
#ifdef HAVE_PKCRYPT
# include "mz_strm_pkcrypt.h"
#endif
#ifdef HAVE_WZAES
# include "mz_strm_wzaes.h"
#endif
#ifdef HAVE_ZLIB
# include "mz_strm_zlib.h"
#endif
#ifdef HAVE_ZSTD
# include "mz_strm_zstd.h"
#endif
#include "mz_zip.h"
#include <ctype.h> /* tolower */
#include <stdio.h> /* snprintf */
#if defined(_MSC_VER) || defined(__MINGW32__)
# define localtime_r(t1, t2) (localtime_s(t2, t1) == 0 ? t1 : NULL)
#endif
#if defined(_MSC_VER) && (_MSC_VER < 1900)
# define snprintf _snprintf
#endif
/***************************************************************************/
#define MZ_ZIP_MAGIC_LOCALHEADER (0x04034b50)
#define MZ_ZIP_MAGIC_LOCALHEADERU8 { 0x50, 0x4b, 0x03, 0x04 }
#define MZ_ZIP_MAGIC_CENTRALHEADER (0x02014b50)
#define MZ_ZIP_MAGIC_CENTRALHEADERU8 { 0x50, 0x4b, 0x01, 0x02 }
#define MZ_ZIP_MAGIC_ENDHEADER (0x06054b50)
#define MZ_ZIP_MAGIC_ENDHEADERU8 { 0x50, 0x4b, 0x05, 0x06 }
#define MZ_ZIP_MAGIC_ENDHEADER64 (0x06064b50)
#define MZ_ZIP_MAGIC_ENDLOCHEADER64 (0x07064b50)
#define MZ_ZIP_MAGIC_DATADESCRIPTOR (0x08074b50)
#define MZ_ZIP_MAGIC_DATADESCRIPTORU8 { 0x50, 0x4b, 0x07, 0x08 }
#define MZ_ZIP_SIZE_LD_ITEM (30)
#define MZ_ZIP_SIZE_CD_ITEM (46)
#define MZ_ZIP_SIZE_CD_LOCATOR64 (20)
#define MZ_ZIP_SIZE_MAX_DATA_DESCRIPTOR (24)
#define MZ_ZIP_OFFSET_CRC_SIZES (14)
#define MZ_ZIP_UNCOMPR_SIZE64_CUSHION (2 * 1024 * 1024)
#ifndef MZ_ZIP_EOCD_MAX_BACK
#define MZ_ZIP_EOCD_MAX_BACK (1 << 20)
#endif
/***************************************************************************/
typedef struct mz_zip_s {
mz_zip_file file_info;
mz_zip_file local_file_info;
void *stream; /* main stream */
void *cd_stream; /* pointer to the stream with the cd */
void *cd_mem_stream; /* memory stream for central directory */
void *compress_stream; /* compression stream */
void *crypt_stream; /* encryption stream */
void *file_info_stream; /* memory stream for storing file info */
void *local_file_info_stream; /* memory stream for storing local file info */
int32_t open_mode;
uint8_t recover;
uint8_t data_descriptor;
uint32_t disk_number_with_cd; /* number of the disk with the central dir */
int64_t disk_offset_shift; /* correction for zips that have wrong offset start of cd */
int64_t cd_start_pos; /* pos of the first file in the central dir stream */
int64_t cd_current_pos; /* pos of the current file in the central dir */
int64_t cd_offset; /* offset of start of central directory */
int64_t cd_size; /* size of the central directory */
uint32_t cd_signature; /* signature of central directory */
uint8_t entry_scanned; /* entry header information read ok */
uint8_t entry_opened; /* entry is open for read/write */
uint8_t entry_raw; /* entry opened with raw mode */
uint32_t entry_crc32; /* entry crc32 */
uint64_t number_entry;
uint16_t version_madeby;
char *comment;
} mz_zip;
/***************************************************************************/
#if 0
# define mz_zip_print printf
#else
# define mz_zip_print(fmt, ...)
#endif
/***************************************************************************/
/* Locate the end of central directory */
static int32_t mz_zip_search_eocd(void *stream, int64_t *central_pos) {
int64_t file_size = 0;
int64_t max_back = MZ_ZIP_EOCD_MAX_BACK;
uint8_t find[4] = MZ_ZIP_MAGIC_ENDHEADERU8;
int32_t err = MZ_OK;
err = mz_stream_seek(stream, 0, MZ_SEEK_END);
if (err != MZ_OK)
return err;
file_size = mz_stream_tell(stream);
if (max_back <= 0 || max_back > file_size)
max_back = file_size;
return mz_stream_find_reverse(stream, (const void *)find, sizeof(find), max_back, central_pos);
}
/* Locate the end of central directory 64 of a zip file */
static int32_t mz_zip_search_zip64_eocd(void *stream, const int64_t end_central_offset, int64_t *central_pos) {
int64_t offset = 0;
uint32_t value32 = 0;
int32_t err = MZ_OK;
*central_pos = 0;
/* Zip64 end of central directory locator */
err = mz_stream_seek(stream, end_central_offset - MZ_ZIP_SIZE_CD_LOCATOR64, MZ_SEEK_SET);
/* Read locator signature */
if (err == MZ_OK) {
err = mz_stream_read_uint32(stream, &value32);
if (value32 != MZ_ZIP_MAGIC_ENDLOCHEADER64)
err = MZ_FORMAT_ERROR;
}
/* Number of the disk with the start of the zip64 end of central directory */
if (err == MZ_OK)
err = mz_stream_read_uint32(stream, &value32);
/* Relative offset of the zip64 end of central directory record8 */
if (err == MZ_OK)
err = mz_stream_read_uint64(stream, (uint64_t *)&offset);
/* Total number of disks */
if (err == MZ_OK)
err = mz_stream_read_uint32(stream, &value32);
/* Goto end of central directory record */
if (err == MZ_OK)
err = mz_stream_seek(stream, (int64_t)offset, MZ_SEEK_SET);
/* The signature */
if (err == MZ_OK) {
err = mz_stream_read_uint32(stream, &value32);
if (value32 != MZ_ZIP_MAGIC_ENDHEADER64)
err = MZ_FORMAT_ERROR;
}
if (err == MZ_OK)
*central_pos = offset;
return err;
}
#ifdef HAVE_PKCRYPT
/* Get PKWARE traditional encryption verifier */
static uint16_t mz_zip_get_pk_verify(uint32_t dos_date, uint64_t crc, uint16_t flag)
{
/* Info-ZIP modification to ZipCrypto format: if bit 3 of the general
* purpose bit flag is set, it uses high byte of 16-bit File Time. */
if (flag & MZ_ZIP_FLAG_DATA_DESCRIPTOR)
return ((dos_date >> 16) & 0xff) << 8 | ((dos_date >> 8) & 0xff);
return ((crc >> 16) & 0xff) << 8 | ((crc >> 24) & 0xff);
}
#endif
/* Get info about the current file in the zip file */
static int32_t mz_zip_entry_read_header(void *stream, uint8_t local, mz_zip_file *file_info, void *file_extra_stream) {
uint64_t ntfs_time = 0;
uint32_t reserved = 0;
uint32_t magic = 0;
uint32_t dos_date = 0;
uint32_t field_pos = 0;
uint16_t field_type = 0;
uint16_t field_length = 0;
uint32_t field_length_read = 0;
uint16_t ntfs_attrib_id = 0;
uint16_t ntfs_attrib_size = 0;
uint16_t linkname_size;
uint16_t value16 = 0;
uint32_t value32 = 0;
int64_t extrafield_pos = 0;
int64_t comment_pos = 0;
int64_t linkname_pos = 0;
int64_t saved_pos = 0;
int32_t err = MZ_OK;
char *linkname = NULL;
memset(file_info, 0, sizeof(mz_zip_file));
/* Check the magic */
err = mz_stream_read_uint32(stream, &magic);
if (err == MZ_END_OF_STREAM)
err = MZ_END_OF_LIST;
else if (magic == MZ_ZIP_MAGIC_ENDHEADER || magic == MZ_ZIP_MAGIC_ENDHEADER64)
err = MZ_END_OF_LIST;
else if ((local) && (magic != MZ_ZIP_MAGIC_LOCALHEADER))
err = MZ_FORMAT_ERROR;
else if ((!local) && (magic != MZ_ZIP_MAGIC_CENTRALHEADER))
err = MZ_FORMAT_ERROR;
/* Read header fields */
if (err == MZ_OK) {
if (!local)
err = mz_stream_read_uint16(stream, &file_info->version_madeby);
if (err == MZ_OK)
err = mz_stream_read_uint16(stream, &file_info->version_needed);
if (err == MZ_OK)
err = mz_stream_read_uint16(stream, &file_info->flag);
if (err == MZ_OK)
err = mz_stream_read_uint16(stream, &file_info->compression_method);
if (err == MZ_OK) {
err = mz_stream_read_uint32(stream, &dos_date);
file_info->modified_date = mz_zip_dosdate_to_time_t(dos_date);
}
if (err == MZ_OK)
err = mz_stream_read_uint32(stream, &file_info->crc);
#ifdef HAVE_PKCRYPT
if (err == MZ_OK && file_info->flag & MZ_ZIP_FLAG_ENCRYPTED) {
/* Use dos_date from header instead of derived from time in zip extensions */
file_info->pk_verify = mz_zip_get_pk_verify(dos_date, file_info->crc, file_info->flag);
}
#endif
if (err == MZ_OK) {
err = mz_stream_read_uint32(stream, &value32);
file_info->compressed_size = value32;
}
if (err == MZ_OK) {
err = mz_stream_read_uint32(stream, &value32);
file_info->uncompressed_size = value32;
}
if (err == MZ_OK)
err = mz_stream_read_uint16(stream, &file_info->filename_size);
if (err == MZ_OK)
err = mz_stream_read_uint16(stream, &file_info->extrafield_size);
if (!local) {
if (err == MZ_OK)
err = mz_stream_read_uint16(stream, &file_info->comment_size);
if (err == MZ_OK) {
err = mz_stream_read_uint16(stream, &value16);
file_info->disk_number = value16;
}
if (err == MZ_OK)
err = mz_stream_read_uint16(stream, &file_info->internal_fa);
if (err == MZ_OK)
err = mz_stream_read_uint32(stream, &file_info->external_fa);
if (err == MZ_OK) {
err = mz_stream_read_uint32(stream, &value32);
file_info->disk_offset = value32;
}
}
}
if (err == MZ_OK)
err = mz_stream_seek(file_extra_stream, 0, MZ_SEEK_SET);
/* Copy variable length data to memory stream for later retrieval */
if ((err == MZ_OK) && (file_info->filename_size > 0))
err = mz_stream_copy(file_extra_stream, stream, file_info->filename_size);
mz_stream_write_uint8(file_extra_stream, 0);
extrafield_pos = mz_stream_tell(file_extra_stream);
if ((err == MZ_OK) && (file_info->extrafield_size > 0))
err = mz_stream_copy(file_extra_stream, stream, file_info->extrafield_size);
mz_stream_write_uint8(file_extra_stream, 0);
comment_pos = mz_stream_tell(file_extra_stream);
if ((err == MZ_OK) && (file_info->comment_size > 0))
err = mz_stream_copy(file_extra_stream, stream, file_info->comment_size);
mz_stream_write_uint8(file_extra_stream, 0);
linkname_pos = mz_stream_tell(file_extra_stream);
/* Overwrite if we encounter UNIX1 extra block */
mz_stream_write_uint8(file_extra_stream, 0);
if ((err == MZ_OK) && (file_info->extrafield_size > 0)) {
/* Seek to and parse the extra field */
err = mz_stream_seek(file_extra_stream, extrafield_pos, MZ_SEEK_SET);
while ((err == MZ_OK) && (field_pos + 4 <= file_info->extrafield_size)) {
err = mz_zip_extrafield_read(file_extra_stream, &field_type, &field_length);
if (err != MZ_OK)
break;
field_pos += 4;
/* Don't allow field length to exceed size of remaining extrafield */
if (field_length > (file_info->extrafield_size - field_pos))
field_length = (uint16_t)(file_info->extrafield_size - field_pos);
/* Read ZIP64 extra field */
if ((field_type == MZ_ZIP_EXTENSION_ZIP64) && (field_length >= 8)) {
if ((err == MZ_OK) && (file_info->uncompressed_size == UINT32_MAX)) {
err = mz_stream_read_int64(file_extra_stream, &file_info->uncompressed_size);
if (file_info->uncompressed_size < 0)
err = MZ_FORMAT_ERROR;
}
if ((err == MZ_OK) && (file_info->compressed_size == UINT32_MAX)) {
err = mz_stream_read_int64(file_extra_stream, &file_info->compressed_size);
if (file_info->compressed_size < 0)
err = MZ_FORMAT_ERROR;
}
if ((err == MZ_OK) && (file_info->disk_offset == UINT32_MAX)) {
err = mz_stream_read_int64(file_extra_stream, &file_info->disk_offset);
if (file_info->disk_offset < 0)
err = MZ_FORMAT_ERROR;
}
if ((err == MZ_OK) && (file_info->disk_number == UINT16_MAX))
err = mz_stream_read_uint32(file_extra_stream, &file_info->disk_number);
}
/* Read NTFS extra field */
else if ((field_type == MZ_ZIP_EXTENSION_NTFS) && (field_length > 4)) {
if (err == MZ_OK)
err = mz_stream_read_uint32(file_extra_stream, &reserved);
field_length_read = 4;
while ((err == MZ_OK) && (field_length_read + 4 <= field_length)) {
err = mz_stream_read_uint16(file_extra_stream, &ntfs_attrib_id);
if (err == MZ_OK)
err = mz_stream_read_uint16(file_extra_stream, &ntfs_attrib_size);
field_length_read += 4;
if ((err == MZ_OK) && (ntfs_attrib_id == 0x01) && (ntfs_attrib_size == 24)) {
err = mz_stream_read_uint64(file_extra_stream, &ntfs_time);
mz_zip_ntfs_to_unix_time(ntfs_time, &file_info->modified_date);
if (err == MZ_OK) {
err = mz_stream_read_uint64(file_extra_stream, &ntfs_time);
mz_zip_ntfs_to_unix_time(ntfs_time, &file_info->accessed_date);
}
if (err == MZ_OK) {
err = mz_stream_read_uint64(file_extra_stream, &ntfs_time);
mz_zip_ntfs_to_unix_time(ntfs_time, &file_info->creation_date);
}
} else if ((err == MZ_OK) && (field_length_read + ntfs_attrib_size <= field_length)) {
err = mz_stream_seek(file_extra_stream, ntfs_attrib_size, MZ_SEEK_CUR);
}
field_length_read += ntfs_attrib_size;
}
}
/* Read UNIX1 extra field */
else if ((field_type == MZ_ZIP_EXTENSION_UNIX1) && (field_length >= 12)) {
if (err == MZ_OK) {
err = mz_stream_read_uint32(file_extra_stream, &value32);
if (err == MZ_OK && file_info->accessed_date == 0)
file_info->accessed_date = value32;
}
if (err == MZ_OK) {
err = mz_stream_read_uint32(file_extra_stream, &value32);
if (err == MZ_OK && file_info->modified_date == 0)
file_info->modified_date = value32;
}
if (err == MZ_OK)
err = mz_stream_read_uint16(file_extra_stream, &value16); /* User id */
if (err == MZ_OK)
err = mz_stream_read_uint16(file_extra_stream, &value16); /* Group id */
/* Copy linkname to end of file extra stream so we can return null
terminated string */
linkname_size = field_length - 12;
if ((err == MZ_OK) && (linkname_size > 0)) {
linkname = (char *)malloc(linkname_size);
if (linkname) {
if (mz_stream_read(file_extra_stream, linkname, linkname_size) != linkname_size)
err = MZ_READ_ERROR;
if (err == MZ_OK) {
saved_pos = mz_stream_tell(file_extra_stream);
mz_stream_seek(file_extra_stream, linkname_pos, MZ_SEEK_SET);
mz_stream_write(file_extra_stream, linkname, linkname_size);
mz_stream_write_uint8(file_extra_stream, 0);
mz_stream_seek(file_extra_stream, saved_pos, MZ_SEEK_SET);
}
free(linkname);
}
}
}
#ifdef HAVE_WZAES
/* Read AES extra field */
else if ((field_type == MZ_ZIP_EXTENSION_AES) && (field_length == 7)) {
uint8_t value8 = 0;
/* Verify version info */
err = mz_stream_read_uint16(file_extra_stream, &value16);
/* Support AE-1 and AE-2 */
if (value16 != 1 && value16 != 2)
err = MZ_FORMAT_ERROR;
file_info->aes_version = value16;
if (err == MZ_OK)
err = mz_stream_read_uint8(file_extra_stream, &value8);
if ((char)value8 != 'A')
err = MZ_FORMAT_ERROR;
if (err == MZ_OK)
err = mz_stream_read_uint8(file_extra_stream, &value8);
if ((char)value8 != 'E')
err = MZ_FORMAT_ERROR;
/* Get AES encryption strength and actual compression method */
if (err == MZ_OK) {
err = mz_stream_read_uint8(file_extra_stream, &value8);
file_info->aes_strength = value8;
}
if (err == MZ_OK) {
err = mz_stream_read_uint16(file_extra_stream, &value16);
file_info->compression_method = value16;
}
}
#endif
else if (field_length > 0) {
err = mz_stream_seek(file_extra_stream, field_length, MZ_SEEK_CUR);
}
field_pos += field_length;
}
}
/* Get pointers to variable length data */
mz_stream_mem_get_buffer(file_extra_stream, (const void **)&file_info->filename);
mz_stream_mem_get_buffer_at(file_extra_stream, extrafield_pos, (const void **)&file_info->extrafield);
mz_stream_mem_get_buffer_at(file_extra_stream, comment_pos, (const void **)&file_info->comment);
mz_stream_mem_get_buffer_at(file_extra_stream, linkname_pos, (const void **)&file_info->linkname);
/* Set to empty string just in-case */
if (!file_info->filename)
file_info->filename = "";
if (!file_info->extrafield)
file_info->extrafield_size = 0;
if (!file_info->comment)
file_info->comment = "";
if (!file_info->linkname)
file_info->linkname = "";
if (err == MZ_OK) {
mz_zip_print("Zip - Entry - Read header - %s (local %" PRId8 ")\n",
file_info->filename, local);
mz_zip_print("Zip - Entry - Read header compress (ucs %" PRId64 " cs %" PRId64 " crc 0x%08" PRIx32 ")\n",
file_info->uncompressed_size, file_info->compressed_size, file_info->crc);
if (!local) {
mz_zip_print("Zip - Entry - Read header disk (disk %" PRIu32 " offset %" PRId64 ")\n",
file_info->disk_number, file_info->disk_offset);
}
mz_zip_print("Zip - Entry - Read header variable (fnl %" PRId32 " efs %" PRId32 " cms %" PRId32 ")\n",
file_info->filename_size, file_info->extrafield_size, file_info->comment_size);
}
return err;
}
static int32_t mz_zip_entry_read_descriptor(void *stream, uint8_t zip64, uint32_t *crc32, int64_t *compressed_size, int64_t *uncompressed_size) {
uint32_t value32 = 0;
int64_t value64 = 0;
int32_t err = MZ_OK;
err = mz_stream_read_uint32(stream, &value32);
if (value32 != MZ_ZIP_MAGIC_DATADESCRIPTOR)
err = MZ_FORMAT_ERROR;
if (err == MZ_OK)
err = mz_stream_read_uint32(stream, &value32);
if (err == MZ_OK && crc32)
*crc32 = value32;
if (err == MZ_OK) {
/* If zip 64 extension is enabled then read as 8 byte */
if (!zip64) {
err = mz_stream_read_uint32(stream, &value32);
value64 = value32;
} else {
err = mz_stream_read_int64(stream, &value64);
if (value64 < 0)
err = MZ_FORMAT_ERROR;
}
if (err == MZ_OK && compressed_size)
*compressed_size = value64;
}
if (err == MZ_OK) {
if (!zip64) {
err = mz_stream_read_uint32(stream, &value32);
value64 = value32;
} else {
err = mz_stream_read_int64(stream, &value64);
if (value64 < 0)
err = MZ_FORMAT_ERROR;
}
if (err == MZ_OK && uncompressed_size)
*uncompressed_size = value64;
}
return err;
}
static int32_t mz_zip_entry_write_crc_sizes(void *stream, uint8_t zip64, uint8_t mask, mz_zip_file *file_info) {
int32_t err = MZ_OK;
if (mask)
err = mz_stream_write_uint32(stream, 0);
else
err = mz_stream_write_uint32(stream, file_info->crc); /* crc */
/* For backwards-compatibility with older zip applications we set all sizes to UINT32_MAX
* when zip64 is needed, instead of only setting sizes larger than UINT32_MAX. */
if (err == MZ_OK) {
if (zip64) /* compr size */
err = mz_stream_write_uint32(stream, UINT32_MAX);
else
err = mz_stream_write_uint32(stream, (uint32_t)file_info->compressed_size);
}
if (err == MZ_OK) {
if (mask) /* uncompr size */
err = mz_stream_write_uint32(stream, 0);
else if (zip64)
err = mz_stream_write_uint32(stream, UINT32_MAX);
else
err = mz_stream_write_uint32(stream, (uint32_t)file_info->uncompressed_size);
}
return err;
}
static int32_t mz_zip_entry_needs_zip64(mz_zip_file *file_info, uint8_t local, uint8_t *zip64) {
uint32_t max_uncompressed_size = UINT32_MAX;
uint8_t needs_zip64 = 0;
if (!zip64)
return MZ_PARAM_ERROR;
*zip64 = 0;
if (local) {
/* At local header we might not know yet whether compressed size will overflow unsigned
32-bit integer which might happen for high entropy data so we give it some cushion */
max_uncompressed_size -= MZ_ZIP_UNCOMPR_SIZE64_CUSHION;
}
needs_zip64 = (file_info->uncompressed_size >= max_uncompressed_size) ||
(file_info->compressed_size >= UINT32_MAX);
if (!local) {
/* Disk offset and number only used in central directory header */
needs_zip64 |= (file_info->disk_offset >= UINT32_MAX) ||
(file_info->disk_number >= UINT16_MAX);
}
if (file_info->zip64 == MZ_ZIP64_AUTO) {
/* If uncompressed size is unknown, assume zip64 for 64-bit data descriptors */
if (local && file_info->uncompressed_size == 0) {
/* Don't use zip64 for local header directory entries */
if (mz_zip_attrib_is_dir(file_info->external_fa, file_info->version_madeby) != MZ_OK) {
*zip64 = 1;
}
}
*zip64 |= needs_zip64;
} else if (file_info->zip64 == MZ_ZIP64_FORCE) {
*zip64 = 1;
} else if (file_info->zip64 == MZ_ZIP64_DISABLE) {
/* Zip64 extension is required to zip file */
if (needs_zip64)
return MZ_PARAM_ERROR;
}
return MZ_OK;
}
static int32_t mz_zip_entry_write_header(void *stream, uint8_t local, mz_zip_file *file_info) {
uint64_t ntfs_time = 0;
uint32_t reserved = 0;
uint32_t dos_date = 0;
uint16_t extrafield_size = 0;
uint16_t field_type = 0;
uint16_t field_length = 0;
uint16_t field_length_zip64 = 0;
uint16_t field_length_ntfs = 0;
uint16_t field_length_aes = 0;
uint16_t field_length_unix1 = 0;
uint16_t filename_size = 0;
uint16_t filename_length = 0;
uint16_t linkname_size = 0;
uint16_t version_needed = 0;
int32_t comment_size = 0;
int32_t err = MZ_OK;
int32_t err_mem = MZ_OK;
uint8_t zip64 = 0;
uint8_t skip_aes = 0;
uint8_t mask = 0;
uint8_t write_end_slash = 0;
const char *filename = NULL;
char masked_name[64];
void *file_extra_stream = NULL;
if (!file_info)
return MZ_PARAM_ERROR;
if ((local) && (file_info->flag & MZ_ZIP_FLAG_MASK_LOCAL_INFO))
mask = 1;
/* Determine if zip64 extra field is necessary */
err = mz_zip_entry_needs_zip64(file_info, local, &zip64);
if (err != MZ_OK)
return err;
/* Start calculating extra field sizes */
if (zip64) {
/* Both compressed and uncompressed sizes must be included (at least in local header) */
field_length_zip64 = 8 + 8;
if ((!local) && (file_info->disk_offset >= UINT32_MAX))
field_length_zip64 += 8;
extrafield_size += 4;
extrafield_size += field_length_zip64;
}
/* Calculate extra field size and check for duplicates */
if (file_info->extrafield_size > 0) {
file_extra_stream = mz_stream_mem_create();
if (!file_extra_stream)
return MZ_MEM_ERROR;
mz_stream_mem_set_buffer(file_extra_stream, (void *)file_info->extrafield,
file_info->extrafield_size);
do {
err_mem = mz_stream_read_uint16(file_extra_stream, &field_type);
if (err_mem == MZ_OK)
err_mem = mz_stream_read_uint16(file_extra_stream, &field_length);
if (err_mem != MZ_OK)
break;
/* Prefer incoming aes extensions over ours */
if (field_type == MZ_ZIP_EXTENSION_AES)
skip_aes = 1;
/* Prefer our zip64, ntfs, unix1 extension over incoming */
if (field_type != MZ_ZIP_EXTENSION_ZIP64 && field_type != MZ_ZIP_EXTENSION_NTFS &&
field_type != MZ_ZIP_EXTENSION_UNIX1)
extrafield_size += 4 + field_length;
if (err_mem == MZ_OK)
err_mem = mz_stream_seek(file_extra_stream, field_length, MZ_SEEK_CUR);
} while (err_mem == MZ_OK);
}
#ifdef HAVE_WZAES
if (!skip_aes) {
if ((file_info->flag & MZ_ZIP_FLAG_ENCRYPTED) && (file_info->aes_version)) {
field_length_aes = 1 + 1 + 1 + 2 + 2;
extrafield_size += 4 + field_length_aes;
}
}
#else
MZ_UNUSED(field_length_aes);
MZ_UNUSED(skip_aes);
#endif
/* NTFS timestamps */
if ((file_info->modified_date != 0) &&
(file_info->accessed_date != 0) &&
(file_info->creation_date != 0) && (!mask)) {
field_length_ntfs = 8 + 8 + 8 + 4 + 2 + 2;
extrafield_size += 4 + field_length_ntfs;
}
/* Unix1 symbolic links */
if (file_info->linkname && *file_info->linkname != 0) {
linkname_size = (uint16_t)strlen(file_info->linkname);
field_length_unix1 = 12 + linkname_size;
extrafield_size += 4 + field_length_unix1;
}
if (local)
err = mz_stream_write_uint32(stream, MZ_ZIP_MAGIC_LOCALHEADER);
else {
err = mz_stream_write_uint32(stream, MZ_ZIP_MAGIC_CENTRALHEADER);
if (err == MZ_OK)
err = mz_stream_write_uint16(stream, file_info->version_madeby);
}
/* Calculate version needed to extract */
if (err == MZ_OK) {
version_needed = file_info->version_needed;
if (version_needed == 0) {
version_needed = 20;
if (zip64)
version_needed = 45;
#ifdef HAVE_BZIP2
if (file_info->compression_method == MZ_COMPRESS_METHOD_BZIP2)
version_needed = 46;
#endif
#ifdef HAVE_WZAES
if ((file_info->flag & MZ_ZIP_FLAG_ENCRYPTED) && (file_info->aes_version))
version_needed = 51;
#endif
#if defined(HAVE_LZMA) || defined(HAVE_LIBCOMP)
if ((file_info->compression_method == MZ_COMPRESS_METHOD_LZMA) ||
(file_info->compression_method == MZ_COMPRESS_METHOD_XZ))
version_needed = 63;
#endif
}
err = mz_stream_write_uint16(stream, version_needed);
}
if (err == MZ_OK)
err = mz_stream_write_uint16(stream, file_info->flag);
if (err == MZ_OK) {
#ifdef HAVE_WZAES
if ((file_info->flag & MZ_ZIP_FLAG_ENCRYPTED) && (file_info->aes_version))
err = mz_stream_write_uint16(stream, MZ_COMPRESS_METHOD_AES);
else
#endif
err = mz_stream_write_uint16(stream, file_info->compression_method);
}
if (err == MZ_OK) {
if (file_info->modified_date != 0 && !mask)
dos_date = mz_zip_time_t_to_dos_date(file_info->modified_date);
err = mz_stream_write_uint32(stream, dos_date);
}
if (err == MZ_OK)
err = mz_zip_entry_write_crc_sizes(stream, zip64, mask, file_info);
if (mask) {
snprintf(masked_name, sizeof(masked_name), "%" PRIx32 "_%" PRIx64,
file_info->disk_number, file_info->disk_offset);
filename = masked_name;
} else {
filename = file_info->filename;
}
filename_length = (uint16_t)strlen(filename);
filename_size += filename_length;
if ((mz_zip_attrib_is_dir(file_info->external_fa, file_info->version_madeby) == MZ_OK) &&
((filename[filename_length - 1] != '/') && (filename[filename_length - 1] != '\\'))) {
filename_size += 1;
write_end_slash = 1;
}
if (err == MZ_OK)
err = mz_stream_write_uint16(stream, filename_size);
if (err == MZ_OK)
err = mz_stream_write_uint16(stream, extrafield_size);
if (!local) {
if (file_info->comment) {
comment_size = (int32_t)strlen(file_info->comment);
if (comment_size > UINT16_MAX)
comment_size = UINT16_MAX;
}
if (err == MZ_OK)
err = mz_stream_write_uint16(stream, (uint16_t)comment_size);
if (err == MZ_OK)
err = mz_stream_write_uint16(stream, (uint16_t)file_info->disk_number);
if (err == MZ_OK)
err = mz_stream_write_uint16(stream, file_info->internal_fa);
if (err == MZ_OK)
err = mz_stream_write_uint32(stream, file_info->external_fa);
if (err == MZ_OK) {
if (file_info->disk_offset >= UINT32_MAX)
err = mz_stream_write_uint32(stream, UINT32_MAX);
else
err = mz_stream_write_uint32(stream, (uint32_t)file_info->disk_offset);
}
}
if (err == MZ_OK) {
const char *backslash = NULL;
const char *next = filename;
int32_t left = filename_length;
/* Ensure all slashes are written as forward slashes according to 4.4.17.1 */
while ((err == MZ_OK) && (backslash = strchr(next, '\\'))) {
int32_t part_length = (int32_t)(backslash - next);
if (mz_stream_write(stream, next, part_length) != part_length ||
mz_stream_write(stream, "/", 1) != 1)
err = MZ_WRITE_ERROR;
left -= part_length + 1;
next = backslash + 1;
}
if (err == MZ_OK && left > 0) {
if (mz_stream_write(stream, next, left) != left)
err = MZ_WRITE_ERROR;
}
/* Ensure that directories have a slash appended to them for compatibility */
if (err == MZ_OK && write_end_slash)
err = mz_stream_write_uint8(stream, '/');
}
/* Write ZIP64 extra field first so we can update sizes later if data descriptor not used */
if ((err == MZ_OK) && (zip64)) {
err = mz_zip_extrafield_write(stream, MZ_ZIP_EXTENSION_ZIP64, field_length_zip64);
if (err == MZ_OK) {
if (mask)
err = mz_stream_write_int64(stream, 0);
else
err = mz_stream_write_int64(stream, file_info->uncompressed_size);
}
if (err == MZ_OK)
err = mz_stream_write_int64(stream, file_info->compressed_size);
if ((err == MZ_OK) && (!local) && (file_info->disk_offset >= UINT32_MAX))
err = mz_stream_write_int64(stream, file_info->disk_offset);
if ((err == MZ_OK) && (!local) && (file_info->disk_number >= UINT16_MAX))
err = mz_stream_write_uint32(stream, file_info->disk_number);
}
/* Write NTFS extra field */
if ((err == MZ_OK) && (field_length_ntfs > 0)) {
err = mz_zip_extrafield_write(stream, MZ_ZIP_EXTENSION_NTFS, field_length_ntfs);
if (err == MZ_OK)
err = mz_stream_write_uint32(stream, reserved);
if (err == MZ_OK)
err = mz_stream_write_uint16(stream, 0x01);
if (err == MZ_OK)
err = mz_stream_write_uint16(stream, field_length_ntfs - 8);
if (err == MZ_OK) {
mz_zip_unix_to_ntfs_time(file_info->modified_date, &ntfs_time);
err = mz_stream_write_uint64(stream, ntfs_time);
}
if (err == MZ_OK) {
mz_zip_unix_to_ntfs_time(file_info->accessed_date, &ntfs_time);
err = mz_stream_write_uint64(stream, ntfs_time);
}
if (err == MZ_OK) {
mz_zip_unix_to_ntfs_time(file_info->creation_date, &ntfs_time);
err = mz_stream_write_uint64(stream, ntfs_time);
}
}
/* Write UNIX extra block extra field */
if ((err == MZ_OK) && (field_length_unix1 > 0)) {
err = mz_zip_extrafield_write(stream, MZ_ZIP_EXTENSION_UNIX1, field_length_unix1);
if (err == MZ_OK)
err = mz_stream_write_uint32(stream, (uint32_t)file_info->accessed_date);
if (err == MZ_OK)
err = mz_stream_write_uint32(stream, (uint32_t)file_info->modified_date);
if (err == MZ_OK) /* User id */
err = mz_stream_write_uint16(stream, 0);
if (err == MZ_OK) /* Group id */
err = mz_stream_write_uint16(stream, 0);
if (err == MZ_OK && linkname_size > 0) {
if (mz_stream_write(stream, file_info->linkname, linkname_size) != linkname_size)
err = MZ_WRITE_ERROR;
}
}
#ifdef HAVE_WZAES
/* Write AES extra field */
if ((err == MZ_OK) && (!skip_aes) && (file_info->flag & MZ_ZIP_FLAG_ENCRYPTED) && (file_info->aes_version)) {
err = mz_zip_extrafield_write(stream, MZ_ZIP_EXTENSION_AES, field_length_aes);
if (err == MZ_OK)
err = mz_stream_write_uint16(stream, file_info->aes_version);
if (err == MZ_OK)
err = mz_stream_write_uint8(stream, 'A');
if (err == MZ_OK)
err = mz_stream_write_uint8(stream, 'E');
if (err == MZ_OK)
err = mz_stream_write_uint8(stream, file_info->aes_strength);
if (err == MZ_OK)
err = mz_stream_write_uint16(stream, file_info->compression_method);
}
#endif
if (file_info->extrafield_size > 0) {
err_mem = mz_stream_mem_seek(file_extra_stream, 0, MZ_SEEK_SET);
while (err == MZ_OK && err_mem == MZ_OK) {
err_mem = mz_stream_read_uint16(file_extra_stream, &field_type);
if (err_mem == MZ_OK)
err_mem = mz_stream_read_uint16(file_extra_stream, &field_length);
if (err_mem != MZ_OK)
break;
/* Prefer our zip 64, ntfs, unix1 extensions over incoming */
if (field_type == MZ_ZIP_EXTENSION_ZIP64 || field_type == MZ_ZIP_EXTENSION_NTFS ||
field_type == MZ_ZIP_EXTENSION_UNIX1) {
err_mem = mz_stream_seek(file_extra_stream, field_length, MZ_SEEK_CUR);
continue;
}
err = mz_stream_write_uint16(stream, field_type);
if (err == MZ_OK)
err = mz_stream_write_uint16(stream, field_length);
if (err == MZ_OK)
err = mz_stream_copy(stream, file_extra_stream, field_length);
}
mz_stream_mem_delete(&file_extra_stream);
}
if (err == MZ_OK && !local && file_info->comment) {
if (mz_stream_write(stream, file_info->comment, file_info->comment_size) != file_info->comment_size)
err = MZ_WRITE_ERROR;
}
return err;
}
static int32_t mz_zip_entry_write_descriptor(void *stream, uint8_t zip64, uint32_t crc32, int64_t compressed_size, int64_t uncompressed_size) {
int32_t err = MZ_OK;
err = mz_stream_write_uint32(stream, MZ_ZIP_MAGIC_DATADESCRIPTOR);
if (err == MZ_OK)
err = mz_stream_write_uint32(stream, crc32);
/* Store data descriptor as 8 bytes if zip 64 extension enabled */
if (err == MZ_OK) {
/* Zip 64 extension is enabled when uncompressed size is > UINT32_MAX */
if (!zip64)
err = mz_stream_write_uint32(stream, (uint32_t)compressed_size);
else
err = mz_stream_write_int64(stream, compressed_size);
}
if (err == MZ_OK) {
if (!zip64)
err = mz_stream_write_uint32(stream, (uint32_t)uncompressed_size);
else
err = mz_stream_write_int64(stream, uncompressed_size);
}
return err;
}
static int32_t mz_zip_read_cd(void *handle) {
mz_zip *zip = (mz_zip *)handle;
uint64_t number_entry_cd64 = 0;
uint64_t number_entry_cd = 0;
int64_t eocd_pos = 0;
int64_t eocd_pos64 = 0;
int64_t value64i = 0;
uint16_t value16 = 0;
uint32_t value32 = 0;
uint64_t value64 = 0;
uint16_t comment_size = 0;
int32_t comment_read = 0;
int32_t err = MZ_OK;
if (!zip)
return MZ_PARAM_ERROR;
/* Read and cache central directory records */
err = mz_zip_search_eocd(zip->stream, &eocd_pos);
if (err == MZ_OK) {
/* The signature, already checked */
err = mz_stream_read_uint32(zip->stream, &value32);
/* Number of this disk */
if (err == MZ_OK)
err = mz_stream_read_uint16(zip->stream, &value16);
/* Number of the disk with the start of the central directory */
if (err == MZ_OK)
err = mz_stream_read_uint16(zip->stream, &value16);
zip->disk_number_with_cd = value16;
/* Total number of entries in the central dir on this disk */
if (err == MZ_OK)
err = mz_stream_read_uint16(zip->stream, &value16);
zip->number_entry = value16;
/* Total number of entries in the central dir */
if (err == MZ_OK)
err = mz_stream_read_uint16(zip->stream, &value16);
number_entry_cd = value16;
if (number_entry_cd != zip->number_entry)
err = MZ_FORMAT_ERROR;
/* Size of the central directory */
if (err == MZ_OK)
err = mz_stream_read_uint32(zip->stream, &value32);
if (err == MZ_OK)
zip->cd_size = value32;
/* Offset of start of central directory with respect to the starting disk number */
if (err == MZ_OK)
err = mz_stream_read_uint32(zip->stream, &value32);
if (err == MZ_OK)
zip->cd_offset = value32;
/* Zip file global comment length */
if (err == MZ_OK)
err = mz_stream_read_uint16(zip->stream, &comment_size);
if ((err == MZ_OK) && (comment_size > 0)) {
zip->comment = (char *)malloc(comment_size + 1);
if (zip->comment) {
comment_read = mz_stream_read(zip->stream, zip->comment, comment_size);
/* Don't fail if incorrect comment length read, not critical */
if (comment_read < 0)
comment_read = 0;
zip->comment[comment_read] = 0;
}
}
if ((err == MZ_OK) && ((number_entry_cd == UINT16_MAX) || (zip->cd_offset == UINT32_MAX))) {
/* Format should be Zip64, as the central directory or file size is too large */
if (mz_zip_search_zip64_eocd(zip->stream, eocd_pos, &eocd_pos64) == MZ_OK) {
eocd_pos = eocd_pos64;
err = mz_stream_seek(zip->stream, eocd_pos, MZ_SEEK_SET);
/* The signature, already checked */
if (err == MZ_OK)
err = mz_stream_read_uint32(zip->stream, &value32);
/* Size of zip64 end of central directory record */
if (err == MZ_OK)
err = mz_stream_read_uint64(zip->stream, &value64);
/* Version made by */
if (err == MZ_OK)
err = mz_stream_read_uint16(zip->stream, &zip->version_madeby);
/* Version needed to extract */
if (err == MZ_OK)
err = mz_stream_read_uint16(zip->stream, &value16);
/* Number of this disk */
if (err == MZ_OK)
err = mz_stream_read_uint32(zip->stream, &value32);
/* Number of the disk with the start of the central directory */
if (err == MZ_OK)
err = mz_stream_read_uint32(zip->stream, &zip->disk_number_with_cd);
/* Total number of entries in the central directory on this disk */
if (err == MZ_OK)
err = mz_stream_read_uint64(zip->stream, &zip->number_entry);
/* Total number of entries in the central directory */
if (err == MZ_OK)
err = mz_stream_read_uint64(zip->stream, &number_entry_cd64);
if (zip->number_entry != number_entry_cd64)
err = MZ_FORMAT_ERROR;
/* Size of the central directory */
if (err == MZ_OK) {
err = mz_stream_read_int64(zip->stream, &zip->cd_size);
if (zip->cd_size < 0)
err = MZ_FORMAT_ERROR;
}
/* Offset of start of central directory with respect to the starting disk number */
if (err == MZ_OK) {
err = mz_stream_read_int64(zip->stream, &zip->cd_offset);
if (zip->cd_offset < 0)
err = MZ_FORMAT_ERROR;
}
} else if ((zip->number_entry == UINT16_MAX) || (number_entry_cd != zip->number_entry) ||
(zip->cd_size == UINT16_MAX) || (zip->cd_offset == UINT32_MAX)) {
err = MZ_FORMAT_ERROR;
}
}
}
if (err == MZ_OK) {
mz_zip_print("Zip - Read cd (disk %" PRId32 " entries %" PRId64 " offset %" PRId64 " size %" PRId64 ")\n",
zip->disk_number_with_cd, zip->number_entry, zip->cd_offset, zip->cd_size);
/* Verify central directory signature exists at offset */
err = mz_stream_seek(zip->stream, zip->cd_offset, MZ_SEEK_SET);
if (err == MZ_OK)
err = mz_stream_read_uint32(zip->stream, &zip->cd_signature);
if ((err == MZ_OK) && (zip->cd_signature != MZ_ZIP_MAGIC_CENTRALHEADER)) {
/* If cd exists in large file and no zip-64 support, error for recover */
if (eocd_pos > UINT32_MAX && eocd_pos64 == 0)
err = MZ_FORMAT_ERROR;
/* If cd not found attempt to seek backward to find it */
if (err == MZ_OK)
err = mz_stream_seek(zip->stream, eocd_pos - zip->cd_size, MZ_SEEK_SET);
if (err == MZ_OK)
err = mz_stream_read_uint32(zip->stream, &zip->cd_signature);
if ((err == MZ_OK) && (zip->cd_signature == MZ_ZIP_MAGIC_CENTRALHEADER)) {
/* If found compensate for incorrect locations */
value64i = zip->cd_offset;
zip->cd_offset = eocd_pos - zip->cd_size;
/* Assume disk has prepended data */
zip->disk_offset_shift = zip->cd_offset - value64i;
}
}
}
if (err == MZ_OK) {
if (eocd_pos < zip->cd_offset) {
/* End of central dir should always come after central dir */
err = MZ_FORMAT_ERROR;
} else if ((uint64_t)eocd_pos < (uint64_t)zip->cd_offset + zip->cd_size) {
/* Truncate size of cd if incorrect size or offset provided */
zip->cd_size = eocd_pos - zip->cd_offset;
}
}
return err;
}
static int32_t mz_zip_write_cd(void *handle) {
mz_zip *zip = (mz_zip *)handle;
int64_t zip64_eocd_pos_inzip = 0;
int64_t disk_number = 0;
int64_t disk_size = 0;
int32_t comment_size = 0;
int32_t err = MZ_OK;
if (!zip)
return MZ_PARAM_ERROR;
if (mz_stream_get_prop_int64(zip->stream, MZ_STREAM_PROP_DISK_NUMBER, &disk_number) == MZ_OK)
zip->disk_number_with_cd = (uint32_t)disk_number;
if (mz_stream_get_prop_int64(zip->stream, MZ_STREAM_PROP_DISK_SIZE, &disk_size) == MZ_OK && disk_size > 0)
zip->disk_number_with_cd += 1;
mz_stream_set_prop_int64(zip->stream, MZ_STREAM_PROP_DISK_NUMBER, -1);
if ((zip->disk_number_with_cd > 0) && (zip->open_mode & MZ_OPEN_MODE_APPEND)) {
/* Overwrite existing central directory if using split disks */
mz_stream_seek(zip->stream, 0, MZ_SEEK_SET);
}
zip->cd_offset = mz_stream_tell(zip->stream);
mz_stream_seek(zip->cd_mem_stream, 0, MZ_SEEK_END);
zip->cd_size = (uint32_t)mz_stream_tell(zip->cd_mem_stream);
mz_stream_seek(zip->cd_mem_stream, 0, MZ_SEEK_SET);
err = mz_stream_copy(zip->stream, zip->cd_mem_stream, (int32_t)zip->cd_size);
mz_zip_print("Zip - Write cd (disk %" PRId32 " entries %" PRId64 " offset %" PRId64 " size %" PRId64 ")\n",
zip->disk_number_with_cd, zip->number_entry, zip->cd_offset, zip->cd_size);
if (zip->cd_size == 0 && zip->number_entry > 0) {
/* Zip does not contain central directory, open with recovery option */
return MZ_FORMAT_ERROR;
}
/* Write the ZIP64 central directory header */
if (zip->cd_offset >= UINT32_MAX || zip->number_entry >= UINT16_MAX) {
zip64_eocd_pos_inzip = mz_stream_tell(zip->stream);
err = mz_stream_write_uint32(zip->stream, MZ_ZIP_MAGIC_ENDHEADER64);
/* Size of this 'zip64 end of central directory' */
if (err == MZ_OK)
err = mz_stream_write_uint64(zip->stream, (uint64_t)44);
/* Version made by */
if (err == MZ_OK)
err = mz_stream_write_uint16(zip->stream, zip->version_madeby);
/* Version needed */
if (err == MZ_OK)
err = mz_stream_write_uint16(zip->stream, (uint16_t)45);
/* Number of this disk */
if (err == MZ_OK)
err = mz_stream_write_uint32(zip->stream, zip->disk_number_with_cd);
/* Number of the disk with the start of the central directory */
if (err == MZ_OK)
err = mz_stream_write_uint32(zip->stream, zip->disk_number_with_cd);
/* Total number of entries in the central dir on this disk */
if (err == MZ_OK)
err = mz_stream_write_uint64(zip->stream, zip->number_entry);
/* Total number of entries in the central dir */
if (err == MZ_OK)
err = mz_stream_write_uint64(zip->stream, zip->number_entry);
/* Size of the central directory */
if (err == MZ_OK)
err = mz_stream_write_int64(zip->stream, zip->cd_size);
/* Offset of start of central directory with respect to the starting disk number */
if (err == MZ_OK)
err = mz_stream_write_int64(zip->stream, zip->cd_offset);
if (err == MZ_OK)
err = mz_stream_write_uint32(zip->stream, MZ_ZIP_MAGIC_ENDLOCHEADER64);
/* Number of the disk with the start of the central directory */
if (err == MZ_OK)
err = mz_stream_write_uint32(zip->stream, zip->disk_number_with_cd);
/* Relative offset to the end of zip64 central directory */
if (err == MZ_OK)
err = mz_stream_write_int64(zip->stream, zip64_eocd_pos_inzip);
/* Number of the disk with the start of the central directory */
if (err == MZ_OK)
err = mz_stream_write_uint32(zip->stream, zip->disk_number_with_cd + 1);
}
/* Write the central directory header */
/* Signature */
if (err == MZ_OK)
err = mz_stream_write_uint32(zip->stream, MZ_ZIP_MAGIC_ENDHEADER);
/* Number of this disk */
if (err == MZ_OK)
err = mz_stream_write_uint16(zip->stream, (uint16_t)zip->disk_number_with_cd);
/* Number of the disk with the start of the central directory */
if (err == MZ_OK)
err = mz_stream_write_uint16(zip->stream, (uint16_t)zip->disk_number_with_cd);
/* Total number of entries in the central dir on this disk */
if (err == MZ_OK) {
if (zip->number_entry >= UINT16_MAX)
err = mz_stream_write_uint16(zip->stream, UINT16_MAX);
else
err = mz_stream_write_uint16(zip->stream, (uint16_t)zip->number_entry);
}
/* Total number of entries in the central dir */
if (err == MZ_OK) {
if (zip->number_entry >= UINT16_MAX)
err = mz_stream_write_uint16(zip->stream, UINT16_MAX);
else
err = mz_stream_write_uint16(zip->stream, (uint16_t)zip->number_entry);
}
/* Size of the central directory */
if (err == MZ_OK)
err = mz_stream_write_uint32(zip->stream, (uint32_t)zip->cd_size);
/* Offset of start of central directory with respect to the starting disk number */
if (err == MZ_OK) {
if (zip->cd_offset >= UINT32_MAX)
err = mz_stream_write_uint32(zip->stream, UINT32_MAX);
else
err = mz_stream_write_uint32(zip->stream, (uint32_t)zip->cd_offset);
}
/* Write global comment */
if (zip->comment) {
comment_size = (int32_t)strlen(zip->comment);
if (comment_size > UINT16_MAX)
comment_size = UINT16_MAX;
}
if (err == MZ_OK)
err = mz_stream_write_uint16(zip->stream, (uint16_t)comment_size);
if (err == MZ_OK) {
if (mz_stream_write(zip->stream, zip->comment, comment_size) != comment_size)
err = MZ_READ_ERROR;
}
return err;
}
static int32_t mz_zip_recover_cd(void *handle) {
mz_zip *zip = (mz_zip *)handle;
mz_zip_file local_file_info;
void *local_file_info_stream = NULL;
void *cd_mem_stream = NULL;
uint64_t number_entry = 0;
int64_t descriptor_pos = 0;
int64_t next_header_pos = 0;
int64_t disk_offset = 0;
int64_t disk_number = 0;
int64_t compressed_pos = 0;
int64_t compressed_end_pos = 0;
int64_t compressed_size = 0;
int64_t uncompressed_size = 0;
uint8_t descriptor_magic[4] = MZ_ZIP_MAGIC_DATADESCRIPTORU8;
uint8_t local_header_magic[4] = MZ_ZIP_MAGIC_LOCALHEADERU8;
uint8_t central_header_magic[4] = MZ_ZIP_MAGIC_CENTRALHEADERU8;
uint32_t crc32 = 0;
int32_t disk_number_with_cd = 0;
int32_t err = MZ_OK;
uint8_t zip64 = 0;
uint8_t eof = 0;
mz_zip_print("Zip - Recover - Start\n");
mz_zip_get_cd_mem_stream(handle, &cd_mem_stream);
/* Determine if we are on a split disk or not */
mz_stream_set_prop_int64(zip->stream, MZ_STREAM_PROP_DISK_NUMBER, 0);
if (mz_stream_tell(zip->stream) < 0) {
mz_stream_set_prop_int64(zip->stream, MZ_STREAM_PROP_DISK_NUMBER, -1);
mz_stream_seek(zip->stream, 0, MZ_SEEK_SET);
} else
disk_number_with_cd = 1;
local_file_info_stream = mz_stream_mem_create();
if (!local_file_info_stream)
return MZ_MEM_ERROR;
if (mz_stream_is_open(cd_mem_stream) != MZ_OK)
err = mz_stream_mem_open(cd_mem_stream, NULL, MZ_OPEN_MODE_CREATE);
mz_stream_mem_open(local_file_info_stream, NULL, MZ_OPEN_MODE_CREATE);
if (err == MZ_OK) {
err = mz_stream_find(zip->stream, (const void *)local_header_magic, sizeof(local_header_magic),
INT64_MAX, &next_header_pos);
}
while (err == MZ_OK && !eof) {
/* Get current offset and disk number for central dir record */
disk_offset = mz_stream_tell(zip->stream);
mz_stream_get_prop_int64(zip->stream, MZ_STREAM_PROP_DISK_NUMBER, &disk_number);
/* Read local headers */
memset(&local_file_info, 0, sizeof(local_file_info));
err = mz_zip_entry_read_header(zip->stream, 1, &local_file_info, local_file_info_stream);
if (err != MZ_OK)
break;
local_file_info.disk_offset = disk_offset;
if (disk_number < 0)
disk_number = 0;
local_file_info.disk_number = (uint32_t)disk_number;
compressed_pos = mz_stream_tell(zip->stream);
if ((err == MZ_OK) && (local_file_info.compressed_size > 0)) {
mz_stream_seek(zip->stream, local_file_info.compressed_size, MZ_SEEK_CUR);
}
for (;;) {
/* Search for the next local header */
err = mz_stream_find(zip->stream, (const void *)local_header_magic, sizeof(local_header_magic),
INT64_MAX, &next_header_pos);
if (err == MZ_EXIST_ERROR) {
mz_stream_seek(zip->stream, compressed_pos, MZ_SEEK_SET);
/* Search for central dir if no local header found */
err = mz_stream_find(zip->stream, (const void *)central_header_magic, sizeof(central_header_magic),
INT64_MAX, &next_header_pos);
if (err == MZ_EXIST_ERROR) {
/* Get end of stream if no central header found */
mz_stream_seek(zip->stream, 0, MZ_SEEK_END);
next_header_pos = mz_stream_tell(zip->stream);
}
eof = 1;
}
if (local_file_info.flag & MZ_ZIP_FLAG_DATA_DESCRIPTOR || local_file_info.compressed_size == 0) {
/* Search backwards for the descriptor, seeking too far back will be incorrect if compressed size is small */
err = mz_stream_find_reverse(zip->stream, (const void *)descriptor_magic, sizeof(descriptor_magic),
MZ_ZIP_SIZE_MAX_DATA_DESCRIPTOR, &descriptor_pos);
if (err == MZ_OK) {
if (mz_zip_extrafield_contains(local_file_info.extrafield,
local_file_info.extrafield_size, MZ_ZIP_EXTENSION_ZIP64, NULL) == MZ_OK)
zip64 = 1;
err = mz_zip_entry_read_descriptor(zip->stream, zip64, &crc32,
&compressed_size, &uncompressed_size);
if (err == MZ_OK) {
if (local_file_info.crc == 0)
local_file_info.crc = crc32;
if (local_file_info.compressed_size == 0)
local_file_info.compressed_size = compressed_size;
if (local_file_info.uncompressed_size == 0)
local_file_info.uncompressed_size = uncompressed_size;
}
compressed_end_pos = descriptor_pos;
} else if (eof) {
compressed_end_pos = next_header_pos;
} else if (local_file_info.flag & MZ_ZIP_FLAG_DATA_DESCRIPTOR) {
/* Wrong local file entry found, keep searching */
next_header_pos += 1;
mz_stream_seek(zip->stream, next_header_pos, MZ_SEEK_SET);
continue;
}
} else {
compressed_end_pos = next_header_pos;
}
break;
}
compressed_size = compressed_end_pos - compressed_pos;
if (compressed_size > UINT32_MAX) {
/* Update sizes if 4GB file is written with no ZIP64 support */
if (local_file_info.uncompressed_size < UINT32_MAX) {
local_file_info.compressed_size = compressed_size;
local_file_info.uncompressed_size = 0;
}
}
mz_zip_print("Zip - Recover - Entry %s (csize %" PRId64 " usize %" PRId64 " flags 0x%" PRIx16 ")\n",
local_file_info.filename, local_file_info.compressed_size, local_file_info.uncompressed_size,
local_file_info.flag);
/* Rewrite central dir with local headers and offsets */
err = mz_zip_entry_write_header(cd_mem_stream, 0, &local_file_info);
if (err == MZ_OK)
number_entry += 1;
err = mz_stream_seek(zip->stream, next_header_pos, MZ_SEEK_SET);
}
mz_stream_mem_delete(&local_file_info_stream);
mz_zip_print("Zip - Recover - Complete (cddisk %" PRId32 " entries %" PRId64 ")\n",
disk_number_with_cd, number_entry);
if (number_entry == 0)
return err;
/* Set new upper seek boundary for central dir mem stream */
disk_offset = mz_stream_tell(cd_mem_stream);
mz_stream_mem_set_buffer_limit(cd_mem_stream, (int32_t)disk_offset);
/* Set new central directory info */
mz_zip_set_cd_stream(handle, 0, cd_mem_stream);
mz_zip_set_number_entry(handle, number_entry);
mz_zip_set_disk_number_with_cd(handle, disk_number_with_cd);
return MZ_OK;
}
void *mz_zip_create(void) {
mz_zip *zip = (mz_zip *)calloc(1, sizeof(mz_zip));
if (zip)
zip->data_descriptor = 1;
return zip;
}
void mz_zip_delete(void **handle) {
mz_zip *zip = NULL;
if (!handle)
return;
zip = (mz_zip *)*handle;
if (zip) {
free(zip);
}
*handle = NULL;
}
int32_t mz_zip_open(void *handle, void *stream, int32_t mode) {
mz_zip *zip = (mz_zip *)handle;
int32_t err = MZ_OK;
if (!zip)
return MZ_PARAM_ERROR;
mz_zip_print("Zip - Open\n");
zip->stream = stream;
zip->cd_mem_stream = mz_stream_mem_create();
if (!zip->cd_mem_stream)
return MZ_MEM_ERROR;
if (mode & MZ_OPEN_MODE_WRITE) {
mz_stream_mem_open(zip->cd_mem_stream, NULL, MZ_OPEN_MODE_CREATE);
zip->cd_stream = zip->cd_mem_stream;
} else {
zip->cd_stream = stream;
}
if ((mode & MZ_OPEN_MODE_READ) || (mode & MZ_OPEN_MODE_APPEND)) {
if ((mode & MZ_OPEN_MODE_CREATE) == 0) {
err = mz_zip_read_cd(zip);
if (err != MZ_OK) {
mz_zip_print("Zip - Error detected reading cd (%" PRId32 ")\n", err);
if (zip->recover && mz_zip_recover_cd(zip) == MZ_OK)
err = MZ_OK;
}
}
if ((err == MZ_OK) && (mode & MZ_OPEN_MODE_APPEND)) {
if (zip->cd_size > 0) {
/* Store central directory in memory */
err = mz_stream_seek(zip->stream, zip->cd_offset, MZ_SEEK_SET);
if (err == MZ_OK)
err = mz_stream_copy(zip->cd_mem_stream, zip->stream, (int32_t)zip->cd_size);
if (err == MZ_OK)
err = mz_stream_seek(zip->stream, zip->cd_offset, MZ_SEEK_SET);
} else {
if (zip->cd_signature == MZ_ZIP_MAGIC_ENDHEADER) {
/* If tiny zip then overwrite end header */
err = mz_stream_seek(zip->stream, zip->cd_offset, MZ_SEEK_SET);
} else {
/* If no central directory, append new zip to end of file */
err = mz_stream_seek(zip->stream, 0, MZ_SEEK_END);
}
}
if (zip->disk_number_with_cd > 0) {
/* Move to last disk to begin appending */
mz_stream_set_prop_int64(zip->stream, MZ_STREAM_PROP_DISK_NUMBER, zip->disk_number_with_cd - 1);
}
} else {
zip->cd_start_pos = zip->cd_offset;
}
}
if (err != MZ_OK) {
mz_zip_close(zip);
return err;
}
/* Memory streams used to store variable length file info data */
zip->file_info_stream = mz_stream_mem_create();
if (!zip->file_info_stream)
return MZ_MEM_ERROR;
mz_stream_mem_open(zip->file_info_stream, NULL, MZ_OPEN_MODE_CREATE);
zip->local_file_info_stream = mz_stream_mem_create();
if (!zip->local_file_info_stream) {
mz_stream_delete(&zip->file_info_stream);
return MZ_MEM_ERROR;
}
mz_stream_mem_open(zip->local_file_info_stream, NULL, MZ_OPEN_MODE_CREATE);
zip->open_mode = mode;
return err;
}
int32_t mz_zip_close(void *handle) {
mz_zip *zip = (mz_zip *)handle;
int32_t err = MZ_OK;
if (!zip)
return MZ_PARAM_ERROR;
mz_zip_print("Zip - Close\n");
if (mz_zip_entry_is_open(handle) == MZ_OK)
err = mz_zip_entry_close(handle);
if ((err == MZ_OK) && (zip->open_mode & MZ_OPEN_MODE_WRITE))
err = mz_zip_write_cd(handle);
if (zip->cd_mem_stream) {
mz_stream_close(zip->cd_mem_stream);
mz_stream_delete(&zip->cd_mem_stream);
}
if (zip->file_info_stream) {
mz_stream_mem_close(zip->file_info_stream);
mz_stream_mem_delete(&zip->file_info_stream);
}
if (zip->local_file_info_stream) {
mz_stream_mem_close(zip->local_file_info_stream);
mz_stream_mem_delete(&zip->local_file_info_stream);
}
if (zip->comment) {
free(zip->comment);
zip->comment = NULL;
}
zip->stream = NULL;
zip->cd_stream = NULL;
return err;
}
int32_t mz_zip_get_comment(void *handle, const char **comment) {
mz_zip *zip = (mz_zip *)handle;
if (!zip || !comment)
return MZ_PARAM_ERROR;
if (!zip->comment)
return MZ_EXIST_ERROR;
*comment = zip->comment;
return MZ_OK;
}
int32_t mz_zip_set_comment(void *handle, const char *comment) {
mz_zip *zip = (mz_zip *)handle;
int32_t comment_size = 0;
if (!zip || !comment)
return MZ_PARAM_ERROR;
if (zip->comment)
free(zip->comment);
comment_size = (int32_t)strlen(comment);
if (comment_size > UINT16_MAX)
return MZ_PARAM_ERROR;
zip->comment = (char *)calloc(comment_size + 1, sizeof(char));
if (!zip->comment)
return MZ_MEM_ERROR;
strncpy(zip->comment, comment, comment_size);
return MZ_OK;
}
int32_t mz_zip_get_version_madeby(void *handle, uint16_t *version_madeby) {
mz_zip *zip = (mz_zip *)handle;
if (!zip || !version_madeby)
return MZ_PARAM_ERROR;
*version_madeby = zip->version_madeby;
return MZ_OK;
}
int32_t mz_zip_set_version_madeby(void *handle, uint16_t version_madeby) {
mz_zip *zip = (mz_zip *)handle;
if (!zip)
return MZ_PARAM_ERROR;
zip->version_madeby = version_madeby;
return MZ_OK;
}
int32_t mz_zip_set_recover(void *handle, uint8_t recover) {
mz_zip *zip = (mz_zip *)handle;
if (!zip)
return MZ_PARAM_ERROR;
zip->recover = recover;
return MZ_OK;
}
int32_t mz_zip_set_data_descriptor(void *handle, uint8_t data_descriptor) {
mz_zip *zip = (mz_zip *)handle;
if (!zip)
return MZ_PARAM_ERROR;
zip->data_descriptor = data_descriptor;
return MZ_OK;
}
int32_t mz_zip_get_stream(void *handle, void **stream) {
mz_zip *zip = (mz_zip *)handle;
if (!zip || !stream)
return MZ_PARAM_ERROR;
*stream = zip->stream;
if (!*stream)
return MZ_EXIST_ERROR;
return MZ_OK;
}
int32_t mz_zip_set_cd_stream(void *handle, int64_t cd_start_pos, void *cd_stream) {
mz_zip *zip = (mz_zip *)handle;
if (!zip || !cd_stream)
return MZ_PARAM_ERROR;
zip->cd_offset = 0;
zip->cd_stream = cd_stream;
zip->cd_start_pos = cd_start_pos;
return MZ_OK;
}
int32_t mz_zip_get_cd_mem_stream(void *handle, void **cd_mem_stream) {
mz_zip *zip = (mz_zip *)handle;
if (!zip || !cd_mem_stream)
return MZ_PARAM_ERROR;
*cd_mem_stream = zip->cd_mem_stream;
if (!*cd_mem_stream)
return MZ_EXIST_ERROR;
return MZ_OK;
}
int32_t mz_zip_set_number_entry(void *handle, uint64_t number_entry) {
mz_zip *zip = (mz_zip *)handle;
if (!zip)
return MZ_PARAM_ERROR;
zip->number_entry = number_entry;
return MZ_OK;
}
int32_t mz_zip_get_number_entry(void *handle, uint64_t *number_entry) {
mz_zip *zip = (mz_zip *)handle;
if (!zip || !number_entry)
return MZ_PARAM_ERROR;
*number_entry = zip->number_entry;
return MZ_OK;
}
int32_t mz_zip_set_disk_number_with_cd(void *handle, uint32_t disk_number_with_cd) {
mz_zip *zip = (mz_zip *)handle;
if (!zip)
return MZ_PARAM_ERROR;
zip->disk_number_with_cd = disk_number_with_cd;
return MZ_OK;
}
int32_t mz_zip_get_disk_number_with_cd(void *handle, uint32_t *disk_number_with_cd) {
mz_zip *zip = (mz_zip *)handle;
if (!zip || !disk_number_with_cd)
return MZ_PARAM_ERROR;
*disk_number_with_cd = zip->disk_number_with_cd;
return MZ_OK;
}
static int32_t mz_zip_entry_close_int(void *handle) {
mz_zip *zip = (mz_zip *)handle;
if (zip->crypt_stream)
mz_stream_delete(&zip->crypt_stream);
zip->crypt_stream = NULL;
if (zip->compress_stream)
mz_stream_delete(&zip->compress_stream);
zip->compress_stream = NULL;
zip->entry_opened = 0;
return MZ_OK;
}
static int32_t mz_zip_entry_open_int(void *handle, uint8_t raw, int16_t compress_level, const char *password) {
mz_zip *zip = (mz_zip *)handle;
int64_t max_total_in = 0;
int64_t header_size = 0;
int64_t footer_size = 0;
int32_t err = MZ_OK;
uint8_t use_crypt = 0;
if (!zip)
return MZ_PARAM_ERROR;
switch (zip->file_info.compression_method) {
case MZ_COMPRESS_METHOD_STORE:
case MZ_COMPRESS_METHOD_DEFLATE:
#ifdef HAVE_BZIP2
case MZ_COMPRESS_METHOD_BZIP2:
#endif
#ifdef HAVE_LZMA
case MZ_COMPRESS_METHOD_LZMA:
#endif
#if defined(HAVE_LZMA) || defined(HAVE_LIBCOMP)
case MZ_COMPRESS_METHOD_XZ:
#endif
#ifdef HAVE_ZSTD
case MZ_COMPRESS_METHOD_ZSTD:
#endif
err = MZ_OK;
break;
default:
return MZ_SUPPORT_ERROR;
}
#ifndef HAVE_WZAES
if (zip->file_info.aes_version)
return MZ_SUPPORT_ERROR;
#endif
zip->entry_raw = raw;
if ((zip->file_info.flag & MZ_ZIP_FLAG_ENCRYPTED) && (password)) {
if (zip->open_mode & MZ_OPEN_MODE_WRITE) {
/* Encrypt only when we are not trying to write raw and password is supplied. */
if (!zip->entry_raw)
use_crypt = 1;
} else if (zip->open_mode & MZ_OPEN_MODE_READ) {
/* Decrypt only when password is supplied. Don't error when password */
/* is not supplied as we may want to read the raw encrypted data. */
use_crypt = 1;
}
}
if ((err == MZ_OK) && (use_crypt)) {
#ifdef HAVE_WZAES
if (zip->file_info.aes_version) {
zip->crypt_stream = mz_stream_wzaes_create();
if (!zip->crypt_stream)
return MZ_MEM_ERROR;
mz_stream_wzaes_set_password(zip->crypt_stream, password);
mz_stream_wzaes_set_strength(zip->crypt_stream, zip->file_info.aes_strength);
} else
#endif
{
#ifdef HAVE_PKCRYPT
uint8_t verify1 = (uint8_t)((zip->file_info.pk_verify >> 8) & 0xff);
uint8_t verify2 = (uint8_t)((zip->file_info.pk_verify) & 0xff);
zip->crypt_stream = mz_stream_pkcrypt_create();
if (!zip->crypt_stream)
return MZ_MEM_ERROR;
mz_stream_pkcrypt_set_password(zip->crypt_stream, password);
mz_stream_pkcrypt_set_verify(zip->crypt_stream, verify1, verify2);
#endif
}
}
if (err == MZ_OK) {
if (!zip->crypt_stream)
zip->crypt_stream = mz_stream_raw_create();
if (!zip->crypt_stream)
return MZ_MEM_ERROR;
mz_stream_set_base(zip->crypt_stream, zip->stream);
err = mz_stream_open(zip->crypt_stream, NULL, zip->open_mode);
}
if (err == MZ_OK) {
if (zip->entry_raw || zip->file_info.compression_method == MZ_COMPRESS_METHOD_STORE)
zip->compress_stream = mz_stream_raw_create();
#ifdef HAVE_ZLIB
else if (zip->file_info.compression_method == MZ_COMPRESS_METHOD_DEFLATE)
zip->compress_stream = mz_stream_zlib_create();
#endif
#ifdef HAVE_BZIP2
else if (zip->file_info.compression_method == MZ_COMPRESS_METHOD_BZIP2)
zip->compress_stream = mz_stream_bzip_create();
#endif
#ifdef HAVE_LIBCOMP
else if (zip->file_info.compression_method == MZ_COMPRESS_METHOD_DEFLATE ||
zip->file_info.compression_method == MZ_COMPRESS_METHOD_XZ) {
zip->compress_stream = mz_stream_libcomp_create();
if (zip->compress_stream)
mz_stream_set_prop_int64(zip->compress_stream, MZ_STREAM_PROP_COMPRESS_METHOD,
zip->file_info.compression_method);
}
#endif
#ifdef HAVE_LZMA
else if (zip->file_info.compression_method == MZ_COMPRESS_METHOD_LZMA ||
zip->file_info.compression_method == MZ_COMPRESS_METHOD_XZ) {
zip->compress_stream = mz_stream_lzma_create();
if (zip->compress_stream)
mz_stream_set_prop_int64(zip->compress_stream, MZ_STREAM_PROP_COMPRESS_METHOD,
zip->file_info.compression_method);
}
#endif
#ifdef HAVE_ZSTD
else if (zip->file_info.compression_method == MZ_COMPRESS_METHOD_ZSTD)
zip->compress_stream = mz_stream_zstd_create();
#endif
else
err = MZ_PARAM_ERROR;
}
if (err == MZ_OK && !zip->compress_stream)
err = MZ_MEM_ERROR;
if (err == MZ_OK) {
if (zip->open_mode & MZ_OPEN_MODE_WRITE) {
mz_stream_set_prop_int64(zip->compress_stream, MZ_STREAM_PROP_COMPRESS_LEVEL, compress_level);
} else {
int32_t set_end_of_stream = 0;
#ifndef HAVE_LIBCOMP
if (zip->entry_raw ||
zip->file_info.compression_method == MZ_COMPRESS_METHOD_STORE ||
zip->file_info.flag & MZ_ZIP_FLAG_ENCRYPTED)
#endif
{
max_total_in = zip->file_info.compressed_size;
mz_stream_set_prop_int64(zip->crypt_stream, MZ_STREAM_PROP_TOTAL_IN_MAX, max_total_in);
if (mz_stream_get_prop_int64(zip->crypt_stream, MZ_STREAM_PROP_HEADER_SIZE, &header_size) == MZ_OK)
max_total_in -= header_size;
if (mz_stream_get_prop_int64(zip->crypt_stream, MZ_STREAM_PROP_FOOTER_SIZE, &footer_size) == MZ_OK)
max_total_in -= footer_size;
mz_stream_set_prop_int64(zip->compress_stream, MZ_STREAM_PROP_TOTAL_IN_MAX, max_total_in);
}
switch (zip->file_info.compression_method) {
case MZ_COMPRESS_METHOD_LZMA:
case MZ_COMPRESS_METHOD_XZ:
set_end_of_stream = (zip->file_info.flag & MZ_ZIP_FLAG_LZMA_EOS_MARKER);
break;
case MZ_COMPRESS_METHOD_ZSTD:
set_end_of_stream = 1;
break;
}
if (set_end_of_stream) {
mz_stream_set_prop_int64(zip->compress_stream, MZ_STREAM_PROP_TOTAL_IN_MAX, zip->file_info.compressed_size);
mz_stream_set_prop_int64(zip->compress_stream, MZ_STREAM_PROP_TOTAL_OUT_MAX, zip->file_info.uncompressed_size);
}
}
mz_stream_set_base(zip->compress_stream, zip->crypt_stream);
err = mz_stream_open(zip->compress_stream, NULL, zip->open_mode);
}
if (err == MZ_OK) {
zip->entry_opened = 1;
zip->entry_crc32 = 0;
} else {
mz_zip_entry_close_int(handle);
}
return err;
}
int32_t mz_zip_entry_is_open(void *handle) {
mz_zip *zip = (mz_zip *)handle;
if (!zip)
return MZ_PARAM_ERROR;
if (zip->entry_opened == 0)
return MZ_EXIST_ERROR;
return MZ_OK;
}
int32_t mz_zip_entry_read_open(void *handle, uint8_t raw, const char *password) {
mz_zip *zip = (mz_zip *)handle;
int32_t err = MZ_OK;
int32_t err_shift = MZ_OK;
#if defined(MZ_ZIP_NO_ENCRYPTION)
if (password)
return MZ_SUPPORT_ERROR;
#endif
if (!zip || !zip->entry_scanned)
return MZ_PARAM_ERROR;
if ((zip->open_mode & MZ_OPEN_MODE_READ) == 0)
return MZ_PARAM_ERROR;
mz_zip_print("Zip - Entry - Read open (raw %" PRId32 ")\n", raw);
err = mz_zip_entry_seek_local_header(handle);
if (err == MZ_OK)
err = mz_zip_entry_read_header(zip->stream, 1, &zip->local_file_info, zip->local_file_info_stream);
if (err == MZ_FORMAT_ERROR && zip->disk_offset_shift > 0) {
/* Perhaps we didn't compensated correctly for incorrect cd offset */
err_shift = mz_stream_seek(zip->stream, zip->file_info.disk_offset, MZ_SEEK_SET);
if (err_shift == MZ_OK)
err_shift = mz_zip_entry_read_header(zip->stream, 1, &zip->local_file_info, zip->local_file_info_stream);
if (err_shift == MZ_OK) {
zip->disk_offset_shift = 0;
err = err_shift;
}
}
#ifdef MZ_ZIP_NO_DECOMPRESSION
if (!raw && zip->file_info.compression_method != MZ_COMPRESS_METHOD_STORE)
err = MZ_SUPPORT_ERROR;
#endif
if (err == MZ_OK)
err = mz_zip_entry_open_int(handle, raw, 0, password);
return err;
}
int32_t mz_zip_entry_write_open(void *handle, const mz_zip_file *file_info, int16_t compress_level, uint8_t raw, const char *password) {
mz_zip *zip = (mz_zip *)handle;
int64_t filename_pos = -1;
int64_t extrafield_pos = 0;
int64_t comment_pos = 0;
int64_t linkname_pos = 0;
int64_t disk_number = 0;
uint8_t is_dir = 0;
int32_t err = MZ_OK;
#if defined(MZ_ZIP_NO_ENCRYPTION)
if (password)
return MZ_SUPPORT_ERROR;
#endif
if (!zip || !file_info || !file_info->filename)
return MZ_PARAM_ERROR;
if (mz_zip_entry_is_open(handle) == MZ_OK) {
err = mz_zip_entry_close(handle);
if (err != MZ_OK)
return err;
}
memcpy(&zip->file_info, file_info, sizeof(mz_zip_file));
mz_zip_print("Zip - Entry - Write open - %s (level %" PRId16 " raw %" PRId8 ")\n",
zip->file_info.filename, compress_level, raw);
mz_stream_seek(zip->file_info_stream, 0, MZ_SEEK_SET);
mz_stream_write(zip->file_info_stream, file_info, sizeof(mz_zip_file));
/* Copy filename, extrafield, and comment internally */
filename_pos = mz_stream_tell(zip->file_info_stream);
if (file_info->filename)
mz_stream_write(zip->file_info_stream, file_info->filename, (int32_t)strlen(file_info->filename));
mz_stream_write_uint8(zip->file_info_stream, 0);
extrafield_pos = mz_stream_tell(zip->file_info_stream);
if (file_info->extrafield)
mz_stream_write(zip->file_info_stream, file_info->extrafield, file_info->extrafield_size);
mz_stream_write_uint8(zip->file_info_stream, 0);
comment_pos = mz_stream_tell(zip->file_info_stream);
if (file_info->comment)
mz_stream_write(zip->file_info_stream, file_info->comment, file_info->comment_size);
mz_stream_write_uint8(zip->file_info_stream, 0);
linkname_pos = mz_stream_tell(zip->file_info_stream);
if (file_info->linkname)
mz_stream_write(zip->file_info_stream, file_info->linkname, (int32_t)strlen(file_info->linkname));
mz_stream_write_uint8(zip->file_info_stream, 0);
mz_stream_mem_get_buffer_at(zip->file_info_stream, filename_pos, (const void **)&zip->file_info.filename);
mz_stream_mem_get_buffer_at(zip->file_info_stream, extrafield_pos, (const void **)&zip->file_info.extrafield);
mz_stream_mem_get_buffer_at(zip->file_info_stream, comment_pos, (const void **)&zip->file_info.comment);
mz_stream_mem_get_buffer_at(zip->file_info_stream, linkname_pos, (const void **)&zip->file_info.linkname);
if (zip->file_info.compression_method == MZ_COMPRESS_METHOD_DEFLATE) {
if ((compress_level == 8) || (compress_level == 9))
zip->file_info.flag |= MZ_ZIP_FLAG_DEFLATE_MAX;
if (compress_level == 2)
zip->file_info.flag |= MZ_ZIP_FLAG_DEFLATE_FAST;
if (compress_level == 1)
zip->file_info.flag |= MZ_ZIP_FLAG_DEFLATE_SUPER_FAST;
}
#if defined(HAVE_LZMA) || defined(HAVE_LIBCOMP)
else if (zip->file_info.compression_method == MZ_COMPRESS_METHOD_LZMA ||
zip->file_info.compression_method == MZ_COMPRESS_METHOD_XZ)
zip->file_info.flag |= MZ_ZIP_FLAG_LZMA_EOS_MARKER;
#endif
if (mz_zip_attrib_is_dir(zip->file_info.external_fa, zip->file_info.version_madeby) == MZ_OK)
is_dir = 1;
if (!is_dir) {
if (zip->data_descriptor)
zip->file_info.flag |= MZ_ZIP_FLAG_DATA_DESCRIPTOR;
if (password)
zip->file_info.flag |= MZ_ZIP_FLAG_ENCRYPTED;
}
mz_stream_get_prop_int64(zip->stream, MZ_STREAM_PROP_DISK_NUMBER, &disk_number);
zip->file_info.disk_number = (uint32_t)disk_number;
zip->file_info.disk_offset = mz_stream_tell(zip->stream);
if (zip->file_info.flag & MZ_ZIP_FLAG_ENCRYPTED) {
#ifdef HAVE_PKCRYPT
/* Pre-calculated CRC value is required for PKWARE traditional encryption */
uint32_t dos_date = mz_zip_time_t_to_dos_date(zip->file_info.modified_date);
zip->file_info.pk_verify = mz_zip_get_pk_verify(dos_date, zip->file_info.crc, zip->file_info.flag);
#endif
#ifdef HAVE_WZAES
if (zip->file_info.aes_version && zip->file_info.aes_strength == 0)
zip->file_info.aes_strength = MZ_AES_STRENGTH_256;
#endif
}
zip->file_info.crc = 0;
zip->file_info.compressed_size = 0;
if ((compress_level == 0) || (is_dir))
zip->file_info.compression_method = MZ_COMPRESS_METHOD_STORE;
#ifdef MZ_ZIP_NO_COMPRESSION
if (zip->file_info.compression_method != MZ_COMPRESS_METHOD_STORE)
err = MZ_SUPPORT_ERROR;
#endif
if (err == MZ_OK)
err = mz_zip_entry_write_header(zip->stream, 1, &zip->file_info);
if (err == MZ_OK)
err = mz_zip_entry_open_int(handle, raw, compress_level, password);
return err;
}
int32_t mz_zip_entry_read(void *handle, void *buf, int32_t len) {
mz_zip *zip = (mz_zip *)handle;
int32_t read = 0;
if (!zip || mz_zip_entry_is_open(handle) != MZ_OK)
return MZ_PARAM_ERROR;
if (UINT_MAX == UINT16_MAX && len > UINT16_MAX) /* zlib limitation */
return MZ_PARAM_ERROR;
if (len == 0)
return MZ_PARAM_ERROR;
if (zip->file_info.compressed_size == 0)
return 0;
/* Read entire entry even if uncompressed_size = 0, otherwise */
/* aes encryption validation will fail if compressed_size > 0 */
read = mz_stream_read(zip->compress_stream, buf, len);
if (read > 0)
zip->entry_crc32 = mz_crypt_crc32_update(zip->entry_crc32, buf, read);
mz_zip_print("Zip - Entry - Read - %" PRId32 " (max %" PRId32 ")\n", read, len);
return read;
}
int32_t mz_zip_entry_write(void *handle, const void *buf, int32_t len) {
mz_zip *zip = (mz_zip *)handle;
int32_t written = 0;
if (!zip || mz_zip_entry_is_open(handle) != MZ_OK)
return MZ_PARAM_ERROR;
written = mz_stream_write(zip->compress_stream, buf, len);
if (written > 0)
zip->entry_crc32 = mz_crypt_crc32_update(zip->entry_crc32, buf, written);
mz_zip_print("Zip - Entry - Write - %" PRId32 " (max %" PRId32 ")\n", written, len);
return written;
}
int32_t mz_zip_entry_read_close(void *handle, uint32_t *crc32, int64_t *compressed_size,
int64_t *uncompressed_size) {
mz_zip *zip = (mz_zip *)handle;
int64_t total_in = 0;
int32_t err = MZ_OK;
uint8_t zip64 = 0;
if (!zip || mz_zip_entry_is_open(handle) != MZ_OK)
return MZ_PARAM_ERROR;
mz_stream_close(zip->compress_stream);
mz_zip_print("Zip - Entry - Read Close\n");
if (crc32)
*crc32 = zip->file_info.crc;
if (compressed_size)
*compressed_size = zip->file_info.compressed_size;
if (uncompressed_size)
*uncompressed_size = zip->file_info.uncompressed_size;
mz_stream_get_prop_int64(zip->compress_stream, MZ_STREAM_PROP_TOTAL_IN, &total_in);
if ((zip->file_info.flag & MZ_ZIP_FLAG_DATA_DESCRIPTOR) &&
((zip->file_info.flag & MZ_ZIP_FLAG_MASK_LOCAL_INFO) == 0) &&
(crc32 || compressed_size || uncompressed_size)) {
/* Check to see if data descriptor is zip64 bit format or not */
if (mz_zip_extrafield_contains(zip->local_file_info.extrafield,
zip->local_file_info.extrafield_size, MZ_ZIP_EXTENSION_ZIP64, NULL) == MZ_OK)
zip64 = 1;
err = mz_zip_entry_seek_local_header(handle);
/* Seek to end of compressed stream since we might have over-read during compression */
if (err == MZ_OK)
err = mz_stream_seek(zip->stream, MZ_ZIP_SIZE_LD_ITEM +
(int64_t)zip->local_file_info.filename_size +
(int64_t)zip->local_file_info.extrafield_size +
total_in, MZ_SEEK_CUR);
/* Read data descriptor */
if (err == MZ_OK)
err = mz_zip_entry_read_descriptor(zip->stream, zip64,
crc32, compressed_size, uncompressed_size);
}
/* If entire entry was not read verification will fail */
if ((err == MZ_OK) && (total_in == zip->file_info.compressed_size) && (!zip->entry_raw)) {
#ifdef HAVE_WZAES
/* AES zip version AE-1 will expect a valid crc as well */
if (zip->file_info.aes_version <= 0x0001)
#endif
{
if (zip->entry_crc32 != zip->file_info.crc) {
mz_zip_print("Zip - Entry - Crc failed (actual 0x%08" PRIx32 " expected 0x%08" PRIx32 ")\n",
zip->entry_crc32, zip->file_info.crc);
err = MZ_CRC_ERROR;
}
}
}
mz_zip_entry_close_int(handle);
return err;
}
int32_t mz_zip_entry_write_close(void *handle, uint32_t crc32, int64_t compressed_size,
int64_t uncompressed_size) {
mz_zip *zip = (mz_zip *)handle;
int64_t end_disk_number = 0;
int32_t err = MZ_OK;
uint8_t zip64 = 0;
if (!zip || mz_zip_entry_is_open(handle) != MZ_OK)
return MZ_PARAM_ERROR;
mz_stream_close(zip->compress_stream);
if (!zip->entry_raw)
crc32 = zip->entry_crc32;
mz_zip_print("Zip - Entry - Write Close (crc 0x%08" PRIx32 " cs %" PRId64 " ucs %" PRId64 ")\n",
crc32, compressed_size, uncompressed_size);
/* If sizes are not set, then read them from the compression stream */
if (compressed_size < 0)
mz_stream_get_prop_int64(zip->compress_stream, MZ_STREAM_PROP_TOTAL_OUT, &compressed_size);
if (uncompressed_size < 0)
mz_stream_get_prop_int64(zip->compress_stream, MZ_STREAM_PROP_TOTAL_IN, &uncompressed_size);
if (zip->file_info.flag & MZ_ZIP_FLAG_ENCRYPTED) {
mz_stream_set_base(zip->crypt_stream, zip->stream);
err = mz_stream_close(zip->crypt_stream);
mz_stream_get_prop_int64(zip->crypt_stream, MZ_STREAM_PROP_TOTAL_OUT, &compressed_size);
}
mz_zip_entry_needs_zip64(&zip->file_info, 1, &zip64);
if ((err == MZ_OK) && (zip->file_info.flag & MZ_ZIP_FLAG_DATA_DESCRIPTOR)) {
/* Determine if we need to write data descriptor in zip64 format,
if local extrafield was saved with zip64 extrafield */
if (zip->file_info.flag & MZ_ZIP_FLAG_MASK_LOCAL_INFO)
err = mz_zip_entry_write_descriptor(zip->stream,
zip64, 0, compressed_size, 0);
else
err = mz_zip_entry_write_descriptor(zip->stream,
zip64, crc32, compressed_size, uncompressed_size);
}
/* Write file info to central directory */
mz_zip_print("Zip - Entry - Write cd (ucs %" PRId64 " cs %" PRId64 " crc 0x%08" PRIx32 ")\n",
uncompressed_size, compressed_size, crc32);
zip->file_info.crc = crc32;
zip->file_info.compressed_size = compressed_size;
zip->file_info.uncompressed_size = uncompressed_size;
if (err == MZ_OK)
err = mz_zip_entry_write_header(zip->cd_mem_stream, 0, &zip->file_info);
/* Update local header with crc32 and sizes */
if ((err == MZ_OK) && ((zip->file_info.flag & MZ_ZIP_FLAG_DATA_DESCRIPTOR) == 0) &&
((zip->file_info.flag & MZ_ZIP_FLAG_MASK_LOCAL_INFO) == 0)) {
/* Save the disk number and position we are to seek back after updating local header */
int64_t end_pos = mz_stream_tell(zip->stream);
mz_stream_get_prop_int64(zip->stream, MZ_STREAM_PROP_DISK_NUMBER, &end_disk_number);
err = mz_zip_entry_seek_local_header(handle);
if (err == MZ_OK) {
/* Seek to crc32 and sizes offset in local header */
mz_stream_set_prop_int64(zip->stream, MZ_STREAM_PROP_DISK_NUMBER, zip->file_info.disk_number);
err = mz_stream_seek(zip->stream, zip->file_info.disk_offset + MZ_ZIP_OFFSET_CRC_SIZES, MZ_SEEK_SET);
}
if (err == MZ_OK)
err = mz_zip_entry_write_crc_sizes(zip->stream, zip64, 0, &zip->file_info);
/* Seek to and update zip64 extension sizes */
if ((err == MZ_OK) && (zip64)) {
int64_t filename_size = zip->file_info.filename_size;
if (filename_size == 0)
filename_size = strlen(zip->file_info.filename);
/* Since we write zip64 extension first we know its offset */
err = mz_stream_seek(zip->stream, 2 + 2 + filename_size + 4, MZ_SEEK_CUR);
if (err == MZ_OK)
err = mz_stream_write_uint64(zip->stream, zip->file_info.uncompressed_size);
if (err == MZ_OK)
err = mz_stream_write_uint64(zip->stream, zip->file_info.compressed_size);
}
mz_stream_set_prop_int64(zip->stream, MZ_STREAM_PROP_DISK_NUMBER, end_disk_number);
mz_stream_seek(zip->stream, end_pos, MZ_SEEK_SET);
}
zip->number_entry += 1;
mz_zip_entry_close_int(handle);
return err;
}
int32_t mz_zip_entry_seek_local_header(void *handle) {
mz_zip *zip = (mz_zip *)handle;
int64_t disk_size = 0;
uint32_t disk_number = zip->file_info.disk_number;
if (disk_number == zip->disk_number_with_cd) {
mz_stream_get_prop_int64(zip->stream, MZ_STREAM_PROP_DISK_SIZE, &disk_size);
if ((disk_size == 0) || ((zip->open_mode & MZ_OPEN_MODE_WRITE) == 0))
disk_number = (uint32_t)-1;
}
mz_stream_set_prop_int64(zip->stream, MZ_STREAM_PROP_DISK_NUMBER, disk_number);
mz_zip_print("Zip - Entry - Seek local (disk %" PRId32 " offset %" PRId64 ")\n",
disk_number, zip->file_info.disk_offset);
/* Guard against seek overflows */
if ((zip->disk_offset_shift > 0) &&
(zip->file_info.disk_offset > (INT64_MAX - zip->disk_offset_shift)))
return MZ_FORMAT_ERROR;
return mz_stream_seek(zip->stream, zip->file_info.disk_offset + zip->disk_offset_shift, MZ_SEEK_SET);
}
int32_t mz_zip_entry_get_compress_stream(void *handle, void **compress_stream) {
mz_zip *zip = (mz_zip *)handle;
if (!zip || !compress_stream)
return MZ_PARAM_ERROR;
*compress_stream = zip->compress_stream;
if (!*compress_stream)
return MZ_EXIST_ERROR;
return MZ_OK;
}
int32_t mz_zip_entry_close(void *handle) {
return mz_zip_entry_close_raw(handle, UINT64_MAX, 0);
}
int32_t mz_zip_entry_close_raw(void *handle, int64_t uncompressed_size, uint32_t crc32) {
mz_zip *zip = (mz_zip *)handle;
int32_t err = MZ_OK;
if (!zip || mz_zip_entry_is_open(handle) != MZ_OK)
return MZ_PARAM_ERROR;
if (zip->open_mode & MZ_OPEN_MODE_WRITE)
err = mz_zip_entry_write_close(handle, crc32, UINT64_MAX, uncompressed_size);
else
err = mz_zip_entry_read_close(handle, NULL, NULL, NULL);
return err;
}
int32_t mz_zip_entry_is_dir(void *handle) {
mz_zip *zip = (mz_zip *)handle;
int32_t filename_length = 0;
if (!zip || !zip->entry_scanned)
return MZ_PARAM_ERROR;
if (mz_zip_attrib_is_dir(zip->file_info.external_fa, zip->file_info.version_madeby) == MZ_OK)
return MZ_OK;
filename_length = (int32_t)strlen(zip->file_info.filename);
if (filename_length > 0) {
if ((zip->file_info.filename[filename_length - 1] == '/') ||
(zip->file_info.filename[filename_length - 1] == '\\'))
return MZ_OK;
}
return MZ_EXIST_ERROR;
}
int32_t mz_zip_entry_is_symlink(void *handle) {
mz_zip *zip = (mz_zip *)handle;
if (!zip || !zip->entry_scanned)
return MZ_PARAM_ERROR;
if (mz_zip_attrib_is_symlink(zip->file_info.external_fa, zip->file_info.version_madeby) != MZ_OK)
return MZ_EXIST_ERROR;
return MZ_OK;
}
int32_t mz_zip_entry_get_info(void *handle, mz_zip_file **file_info) {
mz_zip *zip = (mz_zip *)handle;
if (!zip)
return MZ_PARAM_ERROR;
if ((zip->open_mode & MZ_OPEN_MODE_WRITE) == 0) {
if (!zip->entry_scanned)
return MZ_PARAM_ERROR;
}
*file_info = &zip->file_info;
return MZ_OK;
}
int32_t mz_zip_entry_get_local_info(void *handle, mz_zip_file **local_file_info) {
mz_zip *zip = (mz_zip *)handle;
if (!zip || mz_zip_entry_is_open(handle) != MZ_OK)
return MZ_PARAM_ERROR;
*local_file_info = &zip->local_file_info;
return MZ_OK;
}
int32_t mz_zip_entry_set_extrafield(void *handle, const uint8_t *extrafield, uint16_t extrafield_size) {
mz_zip *zip = (mz_zip *)handle;
if (!zip || mz_zip_entry_is_open(handle) != MZ_OK)
return MZ_PARAM_ERROR;
zip->file_info.extrafield = extrafield;
zip->file_info.extrafield_size = extrafield_size;
return MZ_OK;
}
static int32_t mz_zip_goto_next_entry_int(void *handle) {
mz_zip *zip = (mz_zip *)handle;
int32_t err = MZ_OK;
if (!zip)
return MZ_PARAM_ERROR;
zip->entry_scanned = 0;
mz_stream_set_prop_int64(zip->cd_stream, MZ_STREAM_PROP_DISK_NUMBER, -1);
err = mz_stream_seek(zip->cd_stream, zip->cd_current_pos, MZ_SEEK_SET);
if (err == MZ_OK)
err = mz_zip_entry_read_header(zip->cd_stream, 0, &zip->file_info, zip->file_info_stream);
if (err == MZ_OK)
zip->entry_scanned = 1;
return err;
}
int64_t mz_zip_get_entry(void *handle) {
mz_zip *zip = (mz_zip *)handle;
if (!zip)
return MZ_PARAM_ERROR;
return zip->cd_current_pos;
}
int32_t mz_zip_goto_entry(void *handle, int64_t cd_pos) {
mz_zip *zip = (mz_zip *)handle;
if (!zip)
return MZ_PARAM_ERROR;
if (cd_pos < zip->cd_start_pos || cd_pos > zip->cd_start_pos + zip->cd_size)
return MZ_PARAM_ERROR;
zip->cd_current_pos = cd_pos;
return mz_zip_goto_next_entry_int(handle);
}
int32_t mz_zip_goto_first_entry(void *handle) {
mz_zip *zip = (mz_zip *)handle;
if (!zip)
return MZ_PARAM_ERROR;
zip->cd_current_pos = zip->cd_start_pos;
return mz_zip_goto_next_entry_int(handle);
}
int32_t mz_zip_goto_next_entry(void *handle) {
mz_zip *zip = (mz_zip *)handle;
if (!zip)
return MZ_PARAM_ERROR;
zip->cd_current_pos += (int64_t)MZ_ZIP_SIZE_CD_ITEM + zip->file_info.filename_size +
zip->file_info.extrafield_size + zip->file_info.comment_size;
return mz_zip_goto_next_entry_int(handle);
}
int32_t mz_zip_locate_entry(void *handle, const char *filename, uint8_t ignore_case) {
mz_zip *zip = (mz_zip *)handle;
int32_t err = MZ_OK;
int32_t result = 0;
if (!zip || !filename)
return MZ_PARAM_ERROR;
/* If we are already on the current entry, no need to search */
if (zip->entry_scanned && zip->file_info.filename) {
result = mz_zip_path_compare(zip->file_info.filename, filename, ignore_case);
if (result == 0)
return MZ_OK;
}
/* Search all entries starting at the first */
err = mz_zip_goto_first_entry(handle);
while (err == MZ_OK) {
result = mz_zip_path_compare(zip->file_info.filename, filename, ignore_case);
if (result == 0)
return MZ_OK;
err = mz_zip_goto_next_entry(handle);
}
return err;
}
int32_t mz_zip_locate_first_entry(void *handle, void *userdata, mz_zip_locate_entry_cb cb) {
mz_zip *zip = (mz_zip *)handle;
int32_t err = MZ_OK;
int32_t result = 0;
/* Search first entry looking for match */
err = mz_zip_goto_first_entry(handle);
if (err != MZ_OK)
return err;
result = cb(handle, userdata, &zip->file_info);
if (result == 0)
return MZ_OK;
return mz_zip_locate_next_entry(handle, userdata, cb);
}
int32_t mz_zip_locate_next_entry(void *handle, void *userdata, mz_zip_locate_entry_cb cb) {
mz_zip *zip = (mz_zip *)handle;
int32_t err = MZ_OK;
int32_t result = 0;
/* Search next entries looking for match */
err = mz_zip_goto_next_entry(handle);
while (err == MZ_OK) {
result = cb(handle, userdata, &zip->file_info);
if (result == 0)
return MZ_OK;
err = mz_zip_goto_next_entry(handle);
}
return err;
}
/***************************************************************************/
int32_t mz_zip_attrib_is_dir(uint32_t attrib, int32_t version_madeby) {
uint32_t posix_attrib = 0;
uint8_t system = MZ_HOST_SYSTEM(version_madeby);
int32_t err = MZ_OK;
err = mz_zip_attrib_convert(system, attrib, MZ_HOST_SYSTEM_UNIX, &posix_attrib);
if (err == MZ_OK) {
if ((posix_attrib & 0170000) == 0040000) /* S_ISDIR */
return MZ_OK;
}
return MZ_EXIST_ERROR;
}
int32_t mz_zip_attrib_is_symlink(uint32_t attrib, int32_t version_madeby) {
uint32_t posix_attrib = 0;
uint8_t system = MZ_HOST_SYSTEM(version_madeby);
int32_t err = MZ_OK;
err = mz_zip_attrib_convert(system, attrib, MZ_HOST_SYSTEM_UNIX, &posix_attrib);
if (err == MZ_OK) {
if ((posix_attrib & 0170000) == 0120000) /* S_ISLNK */
return MZ_OK;
}
return MZ_EXIST_ERROR;
}
int32_t mz_zip_attrib_convert(uint8_t src_sys, uint32_t src_attrib, uint8_t target_sys, uint32_t *target_attrib) {
if (!target_attrib)
return MZ_PARAM_ERROR;
*target_attrib = 0;
if ((src_sys == MZ_HOST_SYSTEM_MSDOS) || (src_sys == MZ_HOST_SYSTEM_WINDOWS_NTFS)) {
if ((target_sys == MZ_HOST_SYSTEM_MSDOS) || (target_sys == MZ_HOST_SYSTEM_WINDOWS_NTFS)) {
*target_attrib = src_attrib;
return MZ_OK;
}
if ((target_sys == MZ_HOST_SYSTEM_UNIX) || (target_sys == MZ_HOST_SYSTEM_OSX_DARWIN) || (target_sys == MZ_HOST_SYSTEM_RISCOS))
return mz_zip_attrib_win32_to_posix(src_attrib, target_attrib);
} else if ((src_sys == MZ_HOST_SYSTEM_UNIX) || (src_sys == MZ_HOST_SYSTEM_OSX_DARWIN) || (src_sys == MZ_HOST_SYSTEM_RISCOS)) {
/* If high bytes are set, it contains unix specific attributes */
if ((src_attrib >> 16) != 0)
src_attrib >>= 16;
if ((target_sys == MZ_HOST_SYSTEM_UNIX) || (target_sys == MZ_HOST_SYSTEM_OSX_DARWIN) || (target_sys == MZ_HOST_SYSTEM_RISCOS)) {
*target_attrib = src_attrib;
return MZ_OK;
}
if ((target_sys == MZ_HOST_SYSTEM_MSDOS) || (target_sys == MZ_HOST_SYSTEM_WINDOWS_NTFS))
return mz_zip_attrib_posix_to_win32(src_attrib, target_attrib);
}
return MZ_SUPPORT_ERROR;
}
int32_t mz_zip_attrib_posix_to_win32(uint32_t posix_attrib, uint32_t *win32_attrib) {
if (!win32_attrib)
return MZ_PARAM_ERROR;
*win32_attrib = 0;
/* S_IWUSR | S_IWGRP | S_IWOTH | S_IXUSR | S_IXGRP | S_IXOTH */
if ((posix_attrib & 0000333) == 0 && (posix_attrib & 0000444) != 0)
*win32_attrib |= 0x01; /* FILE_ATTRIBUTE_READONLY */
/* S_IFLNK */
if ((posix_attrib & 0170000) == 0120000)
*win32_attrib |= 0x400; /* FILE_ATTRIBUTE_REPARSE_POINT */
/* S_IFDIR */
else if ((posix_attrib & 0170000) == 0040000)
*win32_attrib |= 0x10; /* FILE_ATTRIBUTE_DIRECTORY */
/* S_IFREG */
else
*win32_attrib |= 0x80; /* FILE_ATTRIBUTE_NORMAL */
return MZ_OK;
}
int32_t mz_zip_attrib_win32_to_posix(uint32_t win32_attrib, uint32_t *posix_attrib) {
if (!posix_attrib)
return MZ_PARAM_ERROR;
*posix_attrib = 0000444; /* S_IRUSR | S_IRGRP | S_IROTH */
/* FILE_ATTRIBUTE_READONLY */
if ((win32_attrib & 0x01) == 0)
*posix_attrib |= 0000222; /* S_IWUSR | S_IWGRP | S_IWOTH */
/* FILE_ATTRIBUTE_REPARSE_POINT */
if ((win32_attrib & 0x400) == 0x400)
*posix_attrib |= 0120000; /* S_IFLNK */
/* FILE_ATTRIBUTE_DIRECTORY */
else if ((win32_attrib & 0x10) == 0x10)
*posix_attrib |= 0040111; /* S_IFDIR | S_IXUSR | S_IXGRP | S_IXOTH */
else
*posix_attrib |= 0100000; /* S_IFREG */
return MZ_OK;
}
/***************************************************************************/
int32_t mz_zip_extrafield_find(void *stream, uint16_t type, int32_t max_seek, uint16_t *length) {
int32_t err = MZ_OK;
uint16_t field_type = 0;
uint16_t field_length = 0;
if (max_seek < 4)
return MZ_EXIST_ERROR;
do {
err = mz_stream_read_uint16(stream, &field_type);
if (err == MZ_OK)
err = mz_stream_read_uint16(stream, &field_length);
if (err != MZ_OK)
break;
if (type == field_type) {
if (length)
*length = field_length;
return MZ_OK;
}
max_seek -= field_length - 4;
if (max_seek < 0)
return MZ_EXIST_ERROR;
err = mz_stream_seek(stream, field_length, MZ_SEEK_CUR);
} while (err == MZ_OK);
return MZ_EXIST_ERROR;
}
int32_t mz_zip_extrafield_contains(const uint8_t *extrafield, int32_t extrafield_size,
uint16_t type, uint16_t *length) {
void *file_extra_stream = NULL;
int32_t err = MZ_OK;
if (!extrafield || !extrafield_size)
return MZ_PARAM_ERROR;
file_extra_stream = mz_stream_mem_create();
if (!file_extra_stream)
return MZ_MEM_ERROR;
mz_stream_mem_set_buffer(file_extra_stream, (void *)extrafield, extrafield_size);
err = mz_zip_extrafield_find(file_extra_stream, type, extrafield_size, length);
mz_stream_mem_delete(&file_extra_stream);
return err;
}
int32_t mz_zip_extrafield_read(void *stream, uint16_t *type, uint16_t *length) {
int32_t err = MZ_OK;
if (!type || !length)
return MZ_PARAM_ERROR;
err = mz_stream_read_uint16(stream, type);
if (err == MZ_OK)
err = mz_stream_read_uint16(stream, length);
return err;
}
int32_t mz_zip_extrafield_write(void *stream, uint16_t type, uint16_t length) {
int32_t err = MZ_OK;
err = mz_stream_write_uint16(stream, type);
if (err == MZ_OK)
err = mz_stream_write_uint16(stream, length);
return err;
}
/***************************************************************************/
static int32_t mz_zip_invalid_date(const struct tm *ptm) {
#define datevalue_in_range(min, max, value) ((min) <= (value) && (value) <= (max))
return (!datevalue_in_range(0, 127 + 80, ptm->tm_year) || /* 1980-based year, allow 80 extra */
!datevalue_in_range(0, 11, ptm->tm_mon) ||
!datevalue_in_range(1, 31, ptm->tm_mday) ||
!datevalue_in_range(0, 23, ptm->tm_hour) ||
!datevalue_in_range(0, 59, ptm->tm_min) ||
!datevalue_in_range(0, 59, ptm->tm_sec));
#undef datevalue_in_range
}
static void mz_zip_dosdate_to_raw_tm(uint64_t dos_date, struct tm *ptm) {
uint64_t date = (uint64_t)(dos_date >> 16);
ptm->tm_mday = (uint16_t)(date & 0x1f);
ptm->tm_mon = (uint16_t)(((date & 0x1E0) / 0x20) - 1);
ptm->tm_year = (uint16_t)(((date & 0x0FE00) / 0x0200) + 80);
ptm->tm_hour = (uint16_t)((dos_date & 0xF800) / 0x800);
ptm->tm_min = (uint16_t)((dos_date & 0x7E0) / 0x20);
ptm->tm_sec = (uint16_t)(2 * (dos_date & 0x1f));
ptm->tm_isdst = -1;
}
int32_t mz_zip_dosdate_to_tm(uint64_t dos_date, struct tm *ptm) {
if (!ptm)
return MZ_PARAM_ERROR;
mz_zip_dosdate_to_raw_tm(dos_date, ptm);
if (mz_zip_invalid_date(ptm)) {
/* Invalid date stored, so don't return it */
memset(ptm, 0, sizeof(struct tm));
return MZ_FORMAT_ERROR;
}
return MZ_OK;
}
time_t mz_zip_dosdate_to_time_t(uint64_t