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Copy pathzip.c
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executable file
·1988 lines (1712 loc) · 69.9 KB
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/* zip.c -- IO on .zip files using zlib
Version 1.1, February 14h, 2010
part of the MiniZip project
Copyright (C) 1998-2010 Gilles Vollant
http://www.winimage.com/zLibDll/minizip.html
Modifications for Zip64 support
Copyright (C) 2009-2010 Mathias Svensson
http://result42.com
Modifications for AES, PKWARE disk spanning
Copyright (C) 2010-2014 Nathan Moinvaziri
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 <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include "zlib.h"
#include "zip.h"
#ifdef HAVE_AES
# define AES_METHOD (99)
# define AES_PWVERIFYSIZE (2)
# define AES_AUTHCODESIZE (10)
# define AES_MAXSALTLENGTH (16)
# define AES_VERSION (0x0001)
# define AES_ENCRYPTIONMODE (0x03)
# include "aes/aes.h"
# include "aes/fileenc.h"
# include "aes/prng.h"
# include "aes/entropy.h"
#endif
#ifndef NOCRYPT
# define INCLUDECRYPTINGCODE_IFCRYPTALLOWED
# include "crypt.h"
#endif
#ifndef local
# define local static
#endif
/* compile with -Dlocal if your debugger can't find static symbols */
#define SIZEDATA_INDATABLOCK (4096-(4*4))
#define DISKHEADERMAGIC (0x08074b50)
#define LOCALHEADERMAGIC (0x04034b50)
#define CENTRALHEADERMAGIC (0x02014b50)
#define ENDHEADERMAGIC (0x06054b50)
#define ZIP64ENDHEADERMAGIC (0x06064b50)
#define ZIP64ENDLOCHEADERMAGIC (0x07064b50)
#define FLAG_LOCALHEADER_OFFSET (0x06)
#define CRC_LOCALHEADER_OFFSET (0x0e)
#define SIZECENTRALHEADER (0x2e) /* 46 */
#define SIZECENTRALHEADERLOCATOR (0x14) /* 20 */
#define SIZECENTRALDIRITEM (0x2e)
#define SIZEZIPLOCALHEADER (0x1e)
#ifndef BUFREADCOMMENT
# define BUFREADCOMMENT (0x400)
#endif
#ifndef VERSIONMADEBY
# define VERSIONMADEBY (0x0) /* platform dependent */
#endif
#ifndef Z_BUFSIZE
# define Z_BUFSIZE (64*1024)
#endif
#ifndef ALLOC
# define ALLOC(size) (malloc(size))
#endif
#ifndef TRYFREE
# define TRYFREE(p) {if (p) free(p);}
#endif
/* NOT sure that this work on ALL platform */
#define MAKEULONG64(a, b) ((uint64_t)(((unsigned long)(a)) | ((uint64_t)((unsigned long)(b))) << 32))
#ifndef DEF_MEM_LEVEL
# if MAX_MEM_LEVEL >= 8
# define DEF_MEM_LEVEL 8
# else
# define DEF_MEM_LEVEL MAX_MEM_LEVEL
# endif
#endif
const char zip_copyright[] = " zip 1.01 Copyright 1998-2004 Gilles Vollant - http://www.winimage.com/zLibDll";
typedef struct linkedlist_datablock_internal_s
{
struct linkedlist_datablock_internal_s *next_datablock;
uint32_t avail_in_this_block;
uint32_t filled_in_this_block;
uint32_t unused; /* for future use and alignment */
uint8_t data[SIZEDATA_INDATABLOCK];
} linkedlist_datablock_internal;
typedef struct linkedlist_data_s
{
linkedlist_datablock_internal *first_block;
linkedlist_datablock_internal *last_block;
} linkedlist_data;
typedef struct
{
z_stream stream; /* zLib stream structure for inflate */
#ifdef HAVE_BZIP2
bz_stream bstream; /* bzLib stream structure for bziped */
#endif
#ifdef HAVE_AES
fcrypt_ctx aes_ctx;
prng_ctx aes_rng[1];
#endif
int stream_initialised; /* 1 is stream is initialized */
uint32_t pos_in_buffered_data; /* last written byte in buffered_data */
uint64_t pos_local_header; /* offset of the local header of the file currently writing */
char *central_header; /* central header data for the current file */
uint16_t size_centralextra;
uint16_t size_centralheader; /* size of the central header for cur file */
uint16_t size_centralextrafree; /* Extra bytes allocated to the central header but that are not used */
uint16_t size_comment;
uint16_t flag; /* flag of the file currently writing */
uint16_t method; /* compression method written to file.*/
uint16_t compression_method; /* compression method to use */
int raw; /* 1 for directly writing raw data */
uint8_t buffered_data[Z_BUFSIZE]; /* buffer contain compressed data to be writ*/
uint32_t dos_date;
uint32_t crc32;
int zip64; /* add ZIP64 extended information in the extra field */
uint32_t number_disk; /* number of current disk used for spanning ZIP */
uint64_t pos_zip64extrainfo;
uint64_t total_compressed;
uint64_t total_uncompressed;
#ifndef NOCRYPT
uint32_t keys[3]; /* keys defining the pseudo-random sequence */
const uint32_t *pcrc_32_tab;
uint32_t crypt_header_size;
#endif
} curfile64_info;
typedef struct
{
zlib_filefunc64_32_def z_filefunc;
voidpf filestream; /* io structure of the zipfile */
voidpf filestream_with_CD; /* io structure of the zipfile with the central dir */
linkedlist_data central_dir; /* datablock with central dir in construction*/
int in_opened_file_inzip; /* 1 if a file in the zip is currently writ.*/
int append; /* append mode */
curfile64_info ci; /* info on the file currently writing */
uint64_t begin_pos; /* position of the beginning of the zipfile */
uint64_t add_position_when_writting_offset;
uint64_t number_entry;
uint64_t disk_size; /* size of each disk */
uint32_t number_disk; /* number of the current disk, used for spanning ZIP */
uint32_t number_disk_with_CD; /* number the the disk with central dir, used for spanning ZIP */
#ifndef NO_ADDFILEINEXISTINGZIP
char *globalcomment;
#endif
} zip64_internal;
/* Allocate a new data block */
local linkedlist_datablock_internal *allocate_new_datablock(void)
{
linkedlist_datablock_internal *ldi = NULL;
ldi = (linkedlist_datablock_internal*)ALLOC(sizeof(linkedlist_datablock_internal));
if (ldi != NULL)
{
ldi->next_datablock = NULL;
ldi->filled_in_this_block = 0;
ldi->avail_in_this_block = SIZEDATA_INDATABLOCK;
}
return ldi;
}
/* Free data block in linked list */
local void free_datablock(linkedlist_datablock_internal *ldi)
{
while (ldi != NULL)
{
linkedlist_datablock_internal *ldinext = ldi->next_datablock;
TRYFREE(ldi);
ldi = ldinext;
}
}
/* Initialize linked list */
local void init_linkedlist(linkedlist_data *ll)
{
ll->first_block = ll->last_block = NULL;
}
/* Free entire linked list and all data blocks */
local void free_linkedlist(linkedlist_data *ll)
{
free_datablock(ll->first_block);
ll->first_block = ll->last_block = NULL;
}
/* Add data to linked list data block */
local int add_data_in_datablock(linkedlist_data *ll, const void *buf, uint32_t len)
{
linkedlist_datablock_internal *ldi = NULL;
const unsigned char *from_copy = NULL;
if (ll == NULL)
return ZIP_INTERNALERROR;
if (ll->last_block == NULL)
{
ll->first_block = ll->last_block = allocate_new_datablock();
if (ll->first_block == NULL)
return ZIP_INTERNALERROR;
}
ldi = ll->last_block;
from_copy = (unsigned char*)buf;
while (len > 0)
{
uint32_t copy_this = 0;
uint32_t i = 0;
unsigned char *to_copy = NULL;
if (ldi->avail_in_this_block == 0)
{
ldi->next_datablock = allocate_new_datablock();
if (ldi->next_datablock == NULL)
return ZIP_INTERNALERROR;
ldi = ldi->next_datablock ;
ll->last_block = ldi;
}
if (ldi->avail_in_this_block < len)
copy_this = ldi->avail_in_this_block;
else
copy_this = len;
to_copy = &(ldi->data[ldi->filled_in_this_block]);
for (i = 0; i < copy_this; i++)
*(to_copy+i) = *(from_copy+i);
ldi->filled_in_this_block += copy_this;
ldi->avail_in_this_block -= copy_this;
from_copy += copy_this;
len -= copy_this;
}
return ZIP_OK;
}
/* Inputs a long in LSB order to the given file: nbByte == 1, 2 ,4 or 8 (byte, short or long, uint64_t) */
local int zipWriteValue(const zlib_filefunc64_32_def *pzlib_filefunc_def, voidpf filestream,
uint64_t x, uint32_t len)
{
unsigned char buf[8];
uint32_t n = 0;
for (n = 0; n < len; n++)
{
buf[n] = (unsigned char)(x & 0xff);
x >>= 8;
}
if (x != 0)
{
/* Data overflow - hack for ZIP64 (X Roche) */
for (n = 0; n < len; n++)
{
buf[n] = 0xff;
}
}
if (ZWRITE64(*pzlib_filefunc_def, filestream, buf, len) != len)
return ZIP_ERRNO;
return ZIP_OK;
}
local uint64_t zipReadValueFromMemory(void* src, uint32_t len)
{
unsigned char *buf = (unsigned char*)src;
uint64_t x = 0;
uint32_t n = 0;
for (n = 0; n < len; n++)
{
x <<= 8;
x |= buf[len - n - 1];
}
return x;
}
local void zipWriteValueToMemory(void* dest, uint64_t x, uint32_t len)
{
unsigned char *buf = (unsigned char*)dest;
uint32_t n = 0;
for (n = 0; n < len; n++)
{
buf[n] = (unsigned char)(x & 0xff);
x >>= 8;
}
if (x != 0)
{
/* data overflow - hack for ZIP64 */
for (n = 0; n < len; n++)
{
buf[n] = 0xff;
}
}
}
local int zipReadUInt8(const zlib_filefunc64_32_def *pzlib_filefunc_def, voidpf filestream, uint8_t *value)
{
uint8_t c = 0;
if (ZREAD64(*pzlib_filefunc_def, filestream, &c, 1) == 1)
{
*value = (uint8_t)c;
return ZIP_OK;
}
if (ZERROR64(*pzlib_filefunc_def, filestream))
return ZIP_ERRNO;
return ZIP_EOF;
}
local int zipReadUInt16(const zlib_filefunc64_32_def *pzlib_filefunc_def, voidpf filestream, uint16_t *value)
{
uint16_t x = 0;
uint8_t c = 0;
int err = ZIP_OK;
err = zipReadUInt8(pzlib_filefunc_def, filestream, &c);
x = (uint16_t)c;
if (err == ZIP_OK)
err = zipReadUInt8(pzlib_filefunc_def, filestream, &c);
x += ((uint16_t)c) << 8;
if (err == ZIP_OK)
*value = x;
else
*value = 0;
return err;
}
local int zipReadUInt32(const zlib_filefunc64_32_def *pzlib_filefunc_def, voidpf filestream, uint32_t *value)
{
uint32_t x = 0;
uint8_t c = 0;
int err = ZIP_OK;
err = zipReadUInt8(pzlib_filefunc_def, filestream, &c);
x = (uint32_t)c;
if (err == ZIP_OK)
err = zipReadUInt8(pzlib_filefunc_def, filestream, &c);
x += ((uint32_t)c) << 8;
if (err == ZIP_OK)
err = zipReadUInt8(pzlib_filefunc_def, filestream, &c);
x += ((uint32_t)c) << 16;
if (err == ZIP_OK)
err = zipReadUInt8(pzlib_filefunc_def, filestream, &c);
x += ((uint32_t)c) << 24;
if (err == ZIP_OK)
*value = x;
else
*value = 0;
return err;
}
local int zipReadUInt64(const zlib_filefunc64_32_def *pzlib_filefunc_def, voidpf filestream, uint64_t *value)
{
uint64_t x = 0;
uint8_t c = 0;
int err = ZIP_OK;
err = zipReadUInt8(pzlib_filefunc_def, filestream, &c);
x = (uint64_t)c;
if (err == ZIP_OK)
err = zipReadUInt8(pzlib_filefunc_def, filestream, &c);
x += ((uint64_t)c) << 8;
if (err == ZIP_OK)
err = zipReadUInt8(pzlib_filefunc_def, filestream, &c);
x += ((uint64_t)c) << 16;
if (err == ZIP_OK)
err = zipReadUInt8(pzlib_filefunc_def, filestream, &c);
x += ((uint64_t)c) << 24;
if (err == ZIP_OK)
err = zipReadUInt8(pzlib_filefunc_def, filestream, &c);
x += ((uint64_t)c) << 32;
if (err == ZIP_OK)
err = zipReadUInt8(pzlib_filefunc_def, filestream, &c);
x += ((uint64_t)c) << 40;
if (err == ZIP_OK)
err = zipReadUInt8(pzlib_filefunc_def, filestream, &c);
x += ((uint64_t)c) << 48;
if (err == ZIP_OK)
err = zipReadUInt8(pzlib_filefunc_def, filestream, &c);
x += ((uint64_t)c) << 56;
if (err == ZIP_OK)
*value = x;
else
*value = 0;
return err;
}
/* Gets the amount of bytes left to write to the current disk for spanning archives */
local int zipGetDiskSizeAvailable(zipFile file, uint64_t *size_available)
{
zip64_internal *zi = NULL;
uint64_t current_disk_size = 0;
zi = (zip64_internal*)file;
ZSEEK64(zi->z_filefunc, zi->filestream, 0, ZLIB_FILEFUNC_SEEK_END);
current_disk_size = ZTELL64(zi->z_filefunc, zi->filestream);
*size_available = zi->disk_size - current_disk_size;
return ZIP_OK;
}
/* Goes to a specific disk number for spanning archives */
local int zipGoToSpecificDisk(zipFile file, uint32_t number_disk, int open_existing)
{
zip64_internal *zi = NULL;
int err = ZIP_OK;
zi = (zip64_internal*)file;
if (zi->disk_size == 0)
return err;
if ((zi->filestream != NULL) && (zi->filestream != zi->filestream_with_CD))
ZCLOSE64(zi->z_filefunc, zi->filestream);
zi->filestream = ZOPENDISK64(zi->z_filefunc, zi->filestream_with_CD, number_disk, (open_existing == 1) ?
(ZLIB_FILEFUNC_MODE_READ | ZLIB_FILEFUNC_MODE_WRITE | ZLIB_FILEFUNC_MODE_EXISTING) :
(ZLIB_FILEFUNC_MODE_READ | ZLIB_FILEFUNC_MODE_WRITE | ZLIB_FILEFUNC_MODE_CREATE));
if (zi->filestream == NULL)
err = ZIP_ERRNO;
return err;
}
/* Goes to the first disk in a spanned archive */
local int zipGoToFirstDisk(zipFile file)
{
zip64_internal *zi = NULL;
uint32_t number_disk_next = 0;
int err = ZIP_OK;
zi = (zip64_internal*)file;
if (zi->disk_size == 0)
return err;
number_disk_next = 0;
if (zi->number_disk_with_CD > 0)
number_disk_next = zi->number_disk_with_CD - 1;
err = zipGoToSpecificDisk(file, number_disk_next, (zi->append == APPEND_STATUS_ADDINZIP));
if ((err == ZIP_ERRNO) && (zi->append == APPEND_STATUS_ADDINZIP))
err = zipGoToSpecificDisk(file, number_disk_next, 0);
if (err == ZIP_OK)
zi->number_disk = number_disk_next;
ZSEEK64(zi->z_filefunc, zi->filestream, 0, ZLIB_FILEFUNC_SEEK_END);
return err;
}
/* Goes to the next disk in a spanned archive */
local int zipGoToNextDisk(zipFile file)
{
zip64_internal *zi = NULL;
uint64_t size_available_in_disk = 0;
uint32_t number_disk_next = 0;
int err = ZIP_OK;
zi = (zip64_internal*)file;
if (zi->disk_size == 0)
return err;
number_disk_next = zi->number_disk + 1;
do
{
err = zipGoToSpecificDisk(file, number_disk_next, (zi->append == APPEND_STATUS_ADDINZIP));
if ((err == ZIP_ERRNO) && (zi->append == APPEND_STATUS_ADDINZIP))
err = zipGoToSpecificDisk(file, number_disk_next, 0);
if (err != ZIP_OK)
break;
err = zipGetDiskSizeAvailable(file, &size_available_in_disk);
if (err != ZIP_OK)
10BC8
break;
zi->number_disk = number_disk_next;
zi->number_disk_with_CD = zi->number_disk + 1;
number_disk_next += 1;
}
while (size_available_in_disk <= 0);
return err;
}
/* Locate the Central directory of a zipfile (at the end, just before the global comment) */
local uint64_t zipSearchCentralDir(const zlib_filefunc64_32_def *pzlib_filefunc_def, voidpf filestream)
{
unsigned char *buf = NULL;
uint64_t file_size = 0;
uint64_t back_read = 4;
uint64_t max_back = UINT16_MAX; /* maximum size of global comment */
uint64_t pos_found = 0;
uint32_t read_size = 0;
uint64_t read_pos = 0;
uint32_t i = 0;
buf = (unsigned char*)ALLOC(BUFREADCOMMENT+4);
if (buf == NULL)
return 0;
if (ZSEEK64(*pzlib_filefunc_def, filestream, 0, ZLIB_FILEFUNC_SEEK_END) != 0)
{
TRYFREE(buf);
return 0;
}
file_size = ZTELL64(*pzlib_filefunc_def, filestream);
if (max_back > file_size)
max_back = file_size;
while (back_read < max_back)
{
if (back_read + BUFREADCOMMENT > max_back)
back_read = max_back;
else
back_read += BUFREADCOMMENT;
read_pos = file_size-back_read;
read_size = ((BUFREADCOMMENT+4) < (file_size - read_pos)) ?
(BUFREADCOMMENT+4) : (uint32_t)(file_size - read_pos);
if (ZSEEK64(*pzlib_filefunc_def, filestream, read_pos, ZLIB_FILEFUNC_SEEK_SET) != 0)
break;
if (ZREAD64(*pzlib_filefunc_def, filestream, buf, read_size) != read_size)
break;
for (i = read_size-3; (i--) > 0;)
if ((*(buf+i)) == (ENDHEADERMAGIC & 0xff) &&
(*(buf+i+1)) == (ENDHEADERMAGIC >> 8 & 0xff) &&
(*(buf+i+2)) == (ENDHEADERMAGIC >> 16 & 0xff) &&
(*(buf+i+3)) == (ENDHEADERMAGIC >> 24 & 0xff))
{
pos_found = read_pos+i;
break;
}
if (pos_found != 0)
break;
}
TRYFREE(buf);
return pos_found;
}
/* Locate the Central directory 64 of a zipfile (at the end, just before the global comment) */
local uint64_t zipSearchCentralDir64(const zlib_filefunc64_32_def *pzlib_filefunc_def, voidpf filestream,
const uint64_t endcentraloffset)
{
uint64_t offset = 0;
uint32_t value32 = 0;
/* Zip64 end of central directory locator */
if (ZSEEK64(*pzlib_filefunc_def, filestream, endcentraloffset - SIZECENTRALHEADERLOCATOR, ZLIB_FILEFUNC_SEEK_SET) != 0)
return 0;
/* Read locator signature */
if (zipReadUInt32(pzlib_filefunc_def, filestream, &value32) != ZIP_OK)
return 0;
if (value32 != ZIP64ENDLOCHEADERMAGIC)
return 0;
/* Number of the disk with the start of the zip64 end of central directory */
if (zipReadUInt32(pzlib_filefunc_def, filestream, &value32) != ZIP_OK)
return 0;
/* Relative offset of the zip64 end of central directory record */
if (zipReadUInt64(pzlib_filefunc_def, filestream, &offset) != ZIP_OK)
return 0;
/* Total number of disks */
if (zipReadUInt32(pzlib_filefunc_def, filestream, &value32) != ZIP_OK)
return 0;
/* Goto end of central directory record */
if (ZSEEK64(*pzlib_filefunc_def,filestream, offset, ZLIB_FILEFUNC_SEEK_SET) != 0)
return 0;
/* The signature */
if (zipReadUInt32(pzlib_filefunc_def, filestream, &value32) != ZIP_OK)
return 0;
if (value32 != ZIP64ENDHEADERMAGIC)
return 0;
return offset;
}
extern zipFile ZEXPORT zipOpen4(const void *path, int append, uint64_t disk_size, const char **globalcomment,
zlib_filefunc64_32_def *pzlib_filefunc64_32_def)
{
zip64_internal ziinit;
zip64_internal *zi = NULL;
#ifndef NO_ADDFILEINEXISTINGZIP
uint64_t byte_before_the_zipfile = 0; /* byte before the zipfile, (>0 for sfx)*/
uint64_t size_central_dir = 0; /* size of the central directory */
uint64_t offset_central_dir = 0; /* offset of start of central directory */
uint64_t number_entry_CD = 0; /* total number of entries in the central dir */
uint64_t number_entry = 0;
uint64_t central_pos = 0;
uint64_t size_central_dir_to_read = 0;
uint16_t value16 = 0;
uint32_t value32 = 0;
uint16_t size_comment = 0;
size_t buf_size = SIZEDATA_INDATABLOCK;
void *buf_read = NULL;
#endif
int err = ZIP_OK;
int mode = 0;
ziinit.z_filefunc.zseek32_file = NULL;
ziinit.z_filefunc.ztell32_file = NULL;
if (pzlib_filefunc64_32_def == NULL)
fill_fopen64_filefunc(&ziinit.z_filefunc.zfile_func64);
else
ziinit.z_filefunc = *pzlib_filefunc64_32_def;
if (append == APPEND_STATUS_CREATE)
mode = (ZLIB_FILEFUNC_MODE_READ | ZLIB_FILEFUNC_MODE_WRITE | ZLIB_FILEFUNC_MODE_CREATE);
else
mode = (ZLIB_FILEFUNC_MODE_READ | ZLIB_FILEFUNC_MODE_WRITE | ZLIB_FILEFUNC_MODE_EXISTING);
ziinit.filestream = ZOPEN64(ziinit.z_filefunc, path, mode);
if (ziinit.filestream == NULL)
return NULL;
if (append == APPEND_STATUS_CREATEAFTER)
{
/* Don't support spanning ZIP with APPEND_STATUS_CREATEAFTER */
if (disk_size > 0)
return NULL;
ZSEEK64(ziinit.z_filefunc,ziinit.filestream,0,SEEK_END);
}
ziinit.filestream_with_CD = ziinit.filestream;
ziinit.append = append;
ziinit.number_disk = 0;
ziinit.number_disk_with_CD = 0;
ziinit.disk_size = disk_size;
ziinit.begin_pos = ZTELL64(ziinit.z_filefunc,ziinit.filestream);
ziinit.in_opened_file_inzip = 0;
ziinit.ci.stream_initialised = 0;
ziinit.number_entry = 0;
ziinit.add_position_when_writting_offset = 0;
init_linkedlist(&(ziinit.central_dir));
zi = (zip64_internal*)ALLOC(sizeof(zip64_internal));
if (zi == NULL)
{
ZCLOSE64(ziinit.z_filefunc,ziinit.filestream);
return NULL;
}
#ifndef NO_ADDFILEINEXISTINGZIP
/* Add file in a zipfile */
ziinit.globalcomment = NULL;
if (append == APPEND_STATUS_ADDINZIP)
{
/* Read and Cache Central Directory Records */
central_pos = zipSearchCentralDir(&ziinit.z_filefunc,ziinit.filestream);
/* Disable to allow appending to empty ZIP archive (must be standard zip, not zip64)
if (central_pos == 0)
err = ZIP_ERRNO;
*/
if (err == ZIP_OK)
{
/* Read end of central directory info */
if (ZSEEK64(ziinit.z_filefunc, ziinit.filestream, central_pos,ZLIB_FILEFUNC_SEEK_SET) != 0)
err = ZIP_ERRNO;
/* The signature, already checked */
if (zipReadUInt32(&ziinit.z_filefunc, ziinit.filestream, &value32) != ZIP_OK)
err = ZIP_ERRNO;
/* Number of this disk */
if (zipReadUInt16(&ziinit.z_filefunc, ziinit.filestream, &value16) != ZIP_OK)
err = ZIP_ERRNO;
ziinit.number_disk = value16;
/* Number of the disk with the start of the central directory */
if (zipReadUInt16(&ziinit.z_filefunc, ziinit.filestream, &value16) != ZIP_OK)
err = ZIP_ERRNO;
ziinit.number_disk_with_CD = value16;
/* Total number of entries in the central dir on this disk */
number_entry = 0;
if (zipReadUInt16(&ziinit.z_filefunc, ziinit.filestream, &value16) != ZIP_OK)
err = ZIP_ERRNO;
else
number_entry = value16;
/* Total number of entries in the central dir */
number_entry_CD = 0;
if (zipReadUInt16(&ziinit.z_filefunc, ziinit.filestream, &value16) != ZIP_OK)
err = ZIP_ERRNO;
else
number_entry_CD = value16;
if (number_entry_CD!=number_entry)
err = ZIP_BADZIPFILE;
/* Size of the central directory */
size_central_dir = 0;
if (zipReadUInt32(&ziinit.z_filefunc, ziinit.filestream, &value32) != ZIP_OK)
err = ZIP_ERRNO;
else
size_central_dir = value32;
/* Offset of start of central directory with respect to the starting disk number */
offset_central_dir = 0;
if (zipReadUInt32(&ziinit.z_filefunc, ziinit.filestream, &value32) != ZIP_OK)
err = ZIP_ERRNO;
else
offset_central_dir = value32;
/* Zipfile global comment length */
if (zipReadUInt16(&ziinit.z_filefunc, ziinit.filestream, &size_comment) != ZIP_OK)
err = ZIP_ERRNO;
if ((err == ZIP_OK) && ((number_entry_CD == UINT16_MAX) || (offset_central_dir == UINT32_MAX)))
{
/* Format should be Zip64, as the central directory or file size is too large */
central_pos = zipSearchCentralDir64(&ziinit.z_filefunc, ziinit.filestream, central_pos);
if (central_pos)
{
uint64_t sizeEndOfCentralDirectory;
if (ZSEEK64(ziinit.z_filefunc, ziinit.filestream, central_pos, ZLIB_FILEFUNC_SEEK_SET) != 0)
err = ZIP_ERRNO;
/* The signature, already checked */
if (zipReadUInt32(&ziinit.z_filefunc, ziinit.filestream, &value32) != ZIP_OK)
err = ZIP_ERRNO;
/* Size of zip64 end of central directory record */
if (zipReadUInt64(&ziinit.z_filefunc, ziinit.filestream, &sizeEndOfCentralDirectory) != ZIP_OK)
err = ZIP_ERRNO;
/* Version made by */
if (zipReadUInt16(&ziinit.z_filefunc, ziinit.filestream, &value16) != ZIP_OK)
err = ZIP_ERRNO;
/* Version needed to extract */
if (zipReadUInt16(&ziinit.z_filefunc, ziinit.filestream, &value16) != ZIP_OK)
err = ZIP_ERRNO;
/* Number of this disk */
if (zipReadUInt32(&ziinit.z_filefunc, ziinit.filestream, &ziinit.number_disk) != ZIP_OK)
err = ZIP_ERRNO;
/* Number of the disk with the start of the central directory */
if (zipReadUInt32(&ziinit.z_filefunc, ziinit.filestream, &ziinit.number_disk_with_CD) != ZIP_OK)
err = ZIP_ERRNO;
/* Total number of entries in the central directory on this disk */
if (zipReadUInt64(&ziinit.z_filefunc, ziinit.filestream, &number_entry) != ZIP_OK)
err = ZIP_ERRNO;
/* Total number of entries in the central directory */
if (zipReadUInt64(&ziinit.z_filefunc, ziinit.filestream, &number_entry_CD) != ZIP_OK)
err = ZIP_ERRNO;
if (number_entry_CD!=number_entry)
err = ZIP_BADZIPFILE;
/* Size of the central directory */
if (zipReadUInt64(&ziinit.z_filefunc, ziinit.filestream, &size_central_dir) != ZIP_OK)
err = ZIP_ERRNO;
/* Offset of start of central directory with respect to the starting disk number */
if (zipReadUInt64(&ziinit.z_filefunc, ziinit.filestream, &offset_central_dir) != ZIP_OK)
err = ZIP_ERRNO;
}
else
err = ZIP_BADZIPFILE;
}
}
if ((err == ZIP_OK) && (central_pos < offset_central_dir + size_central_dir))
err = ZIP_BADZIPFILE;
if ((err == ZIP_OK) && (size_comment > 0))
{
ziinit.globalcomment = (char*)ALLOC(size_comment+1);
if (ziinit.globalcomment)
{
if (ZREAD64(ziinit.z_filefunc, ziinit.filestream, ziinit.globalcomment, size_comment) != size_comment)
err = ZIP_ERRNO;
else
ziinit.globalcomment[size_comment] = 0;
}
}
if (err != ZIP_OK)
{
ZCLOSE64(ziinit.z_filefunc, ziinit.filestream);
TRYFREE(ziinit.globalcomment);
TRYFREE(zi);
return NULL;
}
byte_before_the_zipfile = central_pos - (offset_central_dir+size_central_dir);
ziinit.add_position_when_writting_offset = byte_before_the_zipfile;
/* Store central directory in memory */
size_central_dir_to_read = size_central_dir;
buf_size = SIZEDATA_INDATABLOCK;
buf_read = (void*)ALLOC(buf_size);
if (ZSEEK64(ziinit.z_filefunc, ziinit.filestream,
offset_central_dir + byte_before_the_zipfile, ZLIB_FILEFUNC_SEEK_SET) != 0)
err = ZIP_ERRNO;
while ((size_central_dir_to_read > 0) && (err == ZIP_OK))
{
uint64_t read_this = SIZEDATA_INDATABLOCK;
if (read_this > size_central_dir_to_read)
read_this = size_central_dir_to_read;
if (ZREAD64(ziinit.z_filefunc, ziinit.filestream, buf_read, (uint32_t)read_this) != read_this)
err = ZIP_ERRNO;
if (err == ZIP_OK)
err = add_data_in_datablock(&ziinit.central_dir, buf_read, (uint32_t)read_this);
size_central_dir_to_read -= read_this;
}
TRYFREE(buf_read);
ziinit.begin_pos = byte_before_the_zipfile;
ziinit.number_entry = number_entry_CD;
if (ZSEEK64(ziinit.z_filefunc, ziinit.filestream,
offset_central_dir+byte_before_the_zipfile, ZLIB_FILEFUNC_SEEK_SET) != 0)
err = ZIP_ERRNO;
}
if (globalcomment)
*globalcomment = ziinit.globalcomment;
#endif
if (err != ZIP_OK)
{
#ifndef NO_ADDFILEINEXISTINGZIP
TRYFREE(ziinit.globalcomment);
#endif
TRYFREE(zi);
return NULL;
}
*zi = ziinit;
zipGoToFirstDisk((zipFile)zi);
return(zipFile)zi;
}
extern zipFile ZEXPORT zipOpen2(const char *path, int append, const char **globalcomment,
zlib_filefunc_def *pzlib_filefunc32_def)
{
if (pzlib_filefunc32_def != NULL)
{
zlib_filefunc64_32_def zlib_filefunc64_32_def_fill;
fill_zlib_filefunc64_32_def_from_filefunc32(&zlib_filefunc64_32_def_fill,pzlib_filefunc32_def);
return zipOpen4(path, append, 0, globalcomment, &zlib_filefunc64_32_def_fill);
}
return zipOpen4(path, append, 0, globalcomment, NULL);
}
extern zipFile ZEXPORT zipOpen2_64(const void *path, int append, const char **globalcomment,
zlib_filefunc64_def *pzlib_filefunc_def)
{
if (pzlib_filefunc_def != NULL)
{
zlib_filefunc64_32_def zlib_filefunc64_32_def_fill;
zlib_filefunc64_32_def_fill.zfile_func64 = *pzlib_filefunc_def;
zlib_filefunc64_32_def_fill.ztell32_file = NULL;
zlib_filefunc64_32_def_fill.zseek32_file = NULL;
return zipOpen4(path, append, 0, globalcomment, &zlib_filefunc64_32_def_fill);
}
return zipOpen4(path, append, 0, globalcomment, NULL);
}
extern zipFile ZEXPORT zipOpen3(const char *path, int append, uint64_t disk_size, const char **globalcomment,
zlib_filefunc_def *pzlib_filefunc32_def)
{
if (pzlib_filefunc32_def != NULL)
{
zlib_filefunc64_32_def zlib_filefunc64_32_def_fill;
fill_zlib_filefunc64_32_def_from_filefunc32(&zlib_filefunc64_32_def_fill,pzlib_filefunc32_def);
return zipOpen4(path, append, disk_size, globalcomment, &zlib_filefunc64_32_def_fill);
}
return zipOpen4(path, append, disk_size, globalcomment, NULL);
}
extern zipFile ZEXPORT zipOpen3_64(const void *path, int append, uint64_t disk_size, const char **globalcomment,
zlib_filefunc64_def *pzlib_filefunc_def)
{
if (pzlib_filefunc_def != NULL)
{
zlib_filefunc64_32_def zlib_filefunc64_32_def_fill;
zlib_filefunc64_32_def_fill.zfile_func64 = *pzlib_filefunc_def;
zlib_filefunc64_32_def_fill.ztell32_file = NULL;
zlib_filefunc64_32_def_fill.zseek32_file = NULL;
return zipOpen4(path, append, disk_size, globalcomment, &zlib_filefunc64_32_def_fill);
}
return zipOpen4(path, append, disk_size, globalcomment, NULL);
}
extern zipFile ZEXPORT zipOpen(const char *path, int append)
{
return zipOpen3((const void*)path, append, 0, NULL, NULL);
}
extern zipFile ZEXPORT zipOpen64(const void *path, int append)
{
return zipOpen3(path, append, 0, NULL, NULL);
}
extern int ZEXPORT zipOpenNewFileInZip4_64(zipFile file, const char *filename, const zip_fileinfo *zipfi,
const void *extrafield_local, uint16_t size_extrafield_local, const void *extrafield_global,
uint16_t size_extrafield_global, const char *comment, uint16_t method, int level, int raw, int windowBits, int memLevel,
int strategy, const char *password, uint32_t crc_for_crypting, uint16_t version_madeby, uint16_t flag_base, int zip64)
{
zip64_internal *zi = NULL;
uint64_t size_available = 0;
uint64_t size_needed = 0;
uint16_t size_filename = 0;
uint16_t size_comment = 0;
uint16_t i = 0;
int err = ZIP_OK;
#ifdef NOCRYPT
(crc_for_crypting);
if (password != NULL)
return ZIP_PARAMERROR;
#endif
if (file == NULL)
return ZIP_PARAMERROR;
if ((method != 0) &&
#ifdef HAVE_BZIP2
(method != Z_BZIP2ED) &&
#endif
(method != Z_DEFLATED))
return ZIP_PARAMERROR;
zi = (zip64_internal*)file;
if (zi->in_opened_file_inzip == 1)
{
err = zipCloseFileInZip (file);
if (err != ZIP_OK)
return err;
}
if (filename == NULL)
filename = "-";
if (comment != NULL)
size_comment = (uint16_t)strlen(comment);
size_filename = (uint16_t)strlen(filename);
if (zipfi == NULL)
zi->ci.dos_date = 0;
else
{
if (zipfi->dos_date != 0)
zi->ci.dos_date = zipfi->dos_date;
}
zi->ci.method = method;
zi->ci.compression_method = method;
zi->ci.crc32 = 0;
zi->ci.stream_initialised = 0;
zi->ci.pos_in_buffered_data = 0;
zi->ci.raw = raw;
zi->ci.flag = flag_base;
if ((level == 8) || (level == 9))
zi->ci.flag |= 2;
if (level == 2)
zi->ci.flag |= 4;
if (level == 1)
zi->ci.flag |= 6;
if (password != NULL)
{
zi->ci.flag |= 1;
#ifdef HAVE_AES
zi->ci.method = AES_METHOD;
#endif
}