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1952 lines (1669 loc) · 69.9 KB
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/* unzip.c -- IO for uncompress .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 of Unzip for Zip64
Copyright (C) 2007-2008 Even Rouault
Modifications for Zip64 support on both zip and unzip
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.
Mar 8th, 2016 - Lucio Cosmo
Fixed support for 64bit builds for archives with "PKWARE" password.
Changed long, unsigned long, unsigned to unsigned int in
access functions to crctables and pkeys
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/*#ifndef NOUNCRYPT
# define NOUNCRYPT
#endif*/
#include "zlib.h"
#include "unzip.h"
#ifdef STDC
# include <stddef.h>
# include <string.h>
# include <stdlib.h>
#endif
#ifdef NO_ERRNO_H
extern int errno;
#else
# include <errno.h>
#endif
#ifdef HAVE_AES
# define AES_METHOD (99)
# define AES_PWVERIFYSIZE (2)
# define AES_MAXSALTLENGTH (16)
# define AES_AUTHCODESIZE (10)
# define AES_HEADERSIZE (11)
# define AES_KEYSIZE(mode) (64 + (mode * 64))
# include "aes/aes.h"
# include "aes/fileenc.h"
#endif
#ifndef NOUNCRYPT
# include "crypt.h"
#endif
#ifndef local
# define local static
#endif
/* compile with -Dlocal if your debugger can't find static symbols */
#define DISKHEADERMAGIC (0x08074b50)
#define LOCALHEADERMAGIC (0x04034b50)
#define CENTRALHEADERMAGIC (0x02014b50)
#define ENDHEADERMAGIC (0x06054b50)
#define ZIP64ENDHEADERMAGIC (0x06064b50)
#define ZIP64ENDLOCHEADERMAGIC (0x07064b50)
#define SIZECENTRALDIRITEM (0x2e)
#define SIZECENTRALHEADERLOCATOR (0x14) /* 20 */
#define SIZEZIPLOCALHEADER (0x1e)
#ifndef BUFREADCOMMENT
# define BUFREADCOMMENT (0x400)
#endif
#ifndef UNZ_BUFSIZE
# define UNZ_BUFSIZE (64 * 1024)
#endif
#ifndef UNZ_MAXFILENAMEINZIP
# define UNZ_MAXFILENAMEINZIP (256)
#endif
#ifndef ALLOC
# define ALLOC(size) (malloc(size))
#endif
#ifndef TRYFREE
# define TRYFREE(p) {if (p) free(p);}
#endif
const char unz_copyright[] =
" unzip 1.01 Copyright 1998-2004 Gilles Vollant - http://www.winimage.com/zLibDll";
/* unz_file_info_interntal contain internal info about a file in zipfile*/
typedef struct unz_file_info64_internal_s
{
ZPOS64_T offset_curfile; /* relative offset of local header 8 bytes */
ZPOS64_T byte_before_the_zipfile; /* byte before the zipfile, (>0 for sfx) */
#ifdef HAVE_AES
uLong aes_encryption_mode;
uLong aes_compression_method;
uLong aes_version;
#endif
} unz_file_info64_internal;
/* file_in_zip_read_info_s contain internal information about a file in zipfile */
typedef struct
{
Bytef *read_buffer; /* internal buffer for compressed data */
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;
#endif
ZPOS64_T pos_in_zipfile; /* position in byte on the zipfile, for fseek */
uLong stream_initialised; /* flag set if stream structure is initialised */
ZPOS64_T offset_local_extrafield; /* offset of the local extra field */
uInt size_local_extrafield; /* size of the local extra field */
ZPOS64_T pos_local_extrafield; /* position in the local extra field in read */
ZPOS64_T total_out_64;
uLong crc32; /* crc32 of all data uncompressed */
uLong crc32_wait; /* crc32 we must obtain after decompress all */
ZPOS64_T rest_read_compressed; /* number of byte to be decompressed */
ZPOS64_T rest_read_uncompressed; /* number of byte to be obtained after decomp */
zlib_filefunc64_32_def z_filefunc;
voidpf filestream; /* io structore of the zipfile */
uLong compression_method; /* compression method (0==store) */
ZPOS64_T byte_before_the_zipfile; /* byte before the zipfile, (>0 for sfx) */
int raw;
} file_in_zip64_read_info_s;
/* unz64_s contain internal information about the zipfile */
typedef struct
{
zlib_filefunc64_32_def z_filefunc;
voidpf filestream; /* io structure of the current zipfile */
voidpf filestream_with_CD; /* io structure of the disk with the central directory */
unz_global_info64 gi; /* public global information */
ZPOS64_T byte_before_the_zipfile; /* byte before the zipfile, (>0 for sfx)*/
ZPOS64_T num_file; /* number of the current file in the zipfile*/
ZPOS64_T pos_in_central_dir; /* pos of the current file in the central dir*/
ZPOS64_T current_file_ok; /* flag about the usability of the current file*/
ZPOS64_T central_pos; /* position of the beginning of the central dir*/
uLong number_disk; /* number of the current disk, used for spanning ZIP*/
ZPOS64_T size_central_dir; /* size of the central directory */
ZPOS64_T offset_central_dir; /* offset of start of central directory with
respect to the starting disk number */
unz_file_info64 cur_file_info; /* public info about the current file in zip*/
unz_file_info64_internal cur_file_info_internal;
/* private info about it*/
file_in_zip64_read_info_s* pfile_in_zip_read;
/* structure about the current file if we are decompressing it */
int isZip64; /* is the current file zip64 */
#ifndef NOUNCRYPT
unsigned int keys[3]; /* keys defining the pseudo-random sequence */
const unsigned int* pcrc_32_tab;
#endif
} unz64_s;
/* Translate date/time from Dos format to tm_unz (readable more easily) */
local void unz64local_DosDateToTmuDate (ZPOS64_T ulDosDate, tm_unz* ptm)
{
ZPOS64_T uDate = (ZPOS64_T)(ulDosDate>>16);
ptm->tm_mday = (uInt)(uDate&0x1f);
ptm->tm_mon = (uInt)((((uDate)&0x1E0)/0x20)-1);
ptm->tm_year = (uInt)(((uDate&0x0FE00)/0x0200)+1980);
ptm->tm_hour = (uInt)((ulDosDate &0xF800)/0x800);
ptm->tm_min = (uInt)((ulDosDate&0x7E0)/0x20);
ptm->tm_sec = (uInt)(2*(ulDosDate&0x1f));
#define unz64local_in_range(min, max, value) ((min) <= (value) && (value) <= (max))
if (!unz64local_in_range(0, 11, ptm->tm_mon) ||
!unz64local_in_range(1, 31, ptm->tm_mday) ||
!unz64local_in_range(0, 23, ptm->tm_hour) ||
!unz64local_in_range(0, 59, ptm->tm_min) ||
!unz64local_in_range(0, 59, ptm->tm_sec))
/* Invalid date stored, so don't return it. */
memset(ptm, 0, sizeof(tm_unz));
#undef unz64local_in_range
}
/* Read a byte from a gz_stream; Return EOF for end of file. */
local int unz64local_getByte OF((const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream, int *pi));
local int unz64local_getByte(const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream, int *pi)
{
unsigned char c;
int err = (int)ZREAD64(*pzlib_filefunc_def, filestream, &c, 1);
if (err == 1)
{
*pi = (int)c;
return UNZ_OK;
}
*pi = 0;
if (ZERROR64(*pzlib_filefunc_def, filestream))
return UNZ_ERRNO;
return UNZ_EOF;
}
local int unz64local_getShort OF((const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream, uLong *pX));
local int unz64local_getShort (const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream, uLong *pX)
{
uLong x;
int i = 0;
int err;
err = unz64local_getByte(pzlib_filefunc_def, filestream, &i);
x = (uLong)i;
if (err == UNZ_OK)
err = unz64local_getByte(pzlib_filefunc_def, filestream, &i);
x |= ((uLong)i)<<8;
if (err == UNZ_OK)
*pX = x;
else
*pX = 0;
return err;
}
local int unz64local_getLong OF((const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream, uLong *pX));
local int unz64local_getLong (const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream, uLong *pX)
{
uLong x;
int i = 0;
int err;
err = unz64local_getByte(pzlib_filefunc_def, filestream, &i);
x = (uLong)i;
if (err == UNZ_OK)
err = unz64local_getByte(pzlib_filefunc_def, filestream, &i);
x |= ((uLong)i)<<8;
if (err == UNZ_OK)
err = unz64local_getByte(pzlib_filefunc_def, filestream, &i);
x |= ((uLong)i)<<16;
if (err == UNZ_OK)
err = unz64local_getByte(pzlib_filefunc_def, filestream, &i);
x += ((uLong)i)<<24;
if (err == UNZ_OK)
*pX = x;
else
*pX = 0;
return err;
}
local int unz64local_getLong64 OF((const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream, ZPOS64_T *pX));
local int unz64local_getLong64 (const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream, ZPOS64_T *pX)
{
ZPOS64_T x;
int i = 0;
int err;
err = unz64local_getByte(pzlib_filefunc_def, filestream, &i);
x = (ZPOS64_T)i;
if (err == UNZ_OK)
err = unz64local_getByte(pzlib_filefunc_def, filestream, &i);
x |= ((ZPOS64_T)i)<<8;
if (err == UNZ_OK)
err = unz64local_getByte(pzlib_filefunc_def, filestream, &i);
x |= ((ZPOS64_T)i)<<16;
if (err == UNZ_OK)
err = unz64local_getByte(pzlib_filefunc_def, filestream, &i);
x |= ((ZPOS64_T)i)<<24;
if (err == UNZ_OK)
err = unz64local_getByte(pzlib_filefunc_def, filestream, &i);
x |= ((ZPOS64_T)i)<<32;
if (err == UNZ_OK)
err = unz64local_getByte(pzlib_filefunc_def, filestream, &i);
x |= ((ZPOS64_T)i)<<40;
if (err == UNZ_OK)
err = unz64local_getByte(pzlib_filefunc_def, filestream, &i);
x |= ((ZPOS64_T)i)<<48;
if (err == UNZ_OK)
err = unz64local_getByte(pzlib_filefunc_def, filestream, &i);
x |= ((ZPOS64_T)i)<<56;
if (err == UNZ_OK)
*pX = x;
else
*pX = 0;
return err;
}
/* Locate the Central directory of a zip file (at the end, just before the global comment) */
local ZPOS64_T unz64local_SearchCentralDir OF((const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream));
local ZPOS64_T unz64local_SearchCentralDir(const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream)
{
unsigned char* buf;
ZPOS64_T file_size;
ZPOS64_T back_read = 4;
ZPOS64_T max_back = 0xffff; /* maximum size of global comment */
ZPOS64_T pos_found = 0;
uLong read_size;
ZPOS64_T read_pos;
int i;
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) : (uLong)(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 = (int)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 ZPOS64_T unz64local_SearchCentralDir64 OF((const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream,
const ZPOS64_T endcentraloffset));
local ZPOS64_T unz64local_SearchCentralDir64(const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream,
const ZPOS64_T endcentraloffset)
{
ZPOS64_T offset;
uLong uL;
/* 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 (unz64local_getLong(pzlib_filefunc_def, filestream, &uL) != UNZ_OK)
return 0;
if (uL != ZIP64ENDLOCHEADERMAGIC)
return 0;
/* number of the disk with the start of the zip64 end of central directory */
if (unz64local_getLong(pzlib_filefunc_def, filestream, &uL) != UNZ_OK)
return 0;
/* relative offset of the zip64 end of central directory record */
if (unz64local_getLong64(pzlib_filefunc_def, filestream, &offset) != UNZ_OK)
return 0;
/* total number of disks */
if (unz64local_getLong(pzlib_filefunc_def, filestream, &uL) != UNZ_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 (unz64local_getLong(pzlib_filefunc_def, filestream, &uL) != UNZ_OK)
return 0;
if (uL != ZIP64ENDHEADERMAGIC)
return 0;
return offset;
}
local unzFile unzOpenInternal(const void *path, zlib_filefunc64_32_def* pzlib_filefunc64_32_def)
{
unz64_s us;
unz64_s *s;
ZPOS64_T central_pos;
ZPOS64_T central_pos64;
uLong uL;
ZPOS64_T uL64;
voidpf filestream = NULL;
ZPOS64_T number_entry_CD;
int err = UNZ_OK;
if (unz_copyright[0]!=' ')
return NULL;
us.filestream = NULL;
us.filestream_with_CD = NULL;
us.z_filefunc.zseek32_file = NULL;
us.z_filefunc.ztell32_file = NULL;
if (pzlib_filefunc64_32_def == NULL)
fill_fopen64_filefunc(&us.z_filefunc.zfile_func64);
else
us.z_filefunc = *pzlib_filefunc64_32_def;
us.filestream = ZOPEN64(us.z_filefunc, path, ZLIB_FILEFUNC_MODE_READ | ZLIB_FILEFUNC_MODE_EXISTING);
if (us.filestream == NULL)
return NULL;
us.filestream_with_CD = us.filestream;
us.isZip64 = 0;
/* Search for end of central directory header */
central_pos = unz64local_SearchCentralDir(&us.z_filefunc, us.filestream);
if (central_pos)
{
if (ZSEEK64(us.z_filefunc, us.filestream, central_pos, ZLIB_FILEFUNC_SEEK_SET) != 0)
err = UNZ_ERRNO;
/* the signature, already checked */
if (unz64local_getLong(&us.z_filefunc, us.filestream, &uL) != UNZ_OK)
err = UNZ_ERRNO;
/* number of this disk */
if (unz64local_getShort(&us.z_filefunc, us.filestream, &uL) != UNZ_OK)
err = UNZ_ERRNO;
us.number_disk = uL;
/* number of the disk with the start of the central directory */
if (unz64local_getShort(&us.z_filefunc, us.filestream,& uL) != UNZ_OK)
err = UNZ_ERRNO;
us.gi.number_disk_with_CD = uL;
/* total number of entries in the central directory on this disk */
if (unz64local_getShort(&us.z_filefunc, us.filestream, &uL) != UNZ_OK)
err = UNZ_ERRNO;
us.gi.number_entry = uL;
/* total number of entries in the central directory */
if (unz64local_getShort(&us.z_filefunc, us.filestream, &uL) != UNZ_OK)
err = UNZ_ERRNO;
number_entry_CD = uL;
if (number_entry_CD != us.gi.number_entry)
err = UNZ_BADZIPFILE;
/* size of the central directory */
if (unz64local_getLong(&us.z_filefunc, us.filestream, &uL) != UNZ_OK)
err = UNZ_ERRNO;
us.size_central_dir = uL;
/* offset of start of central directory with respect to the starting disk number */
if (unz64local_getLong(&us.z_filefunc, us.filestream, &uL) != UNZ_OK)
err = UNZ_ERRNO;
us.offset_central_dir = uL;
/* zipfile comment length */
if (unz64local_getShort(&us.z_filefunc, us.filestream, &us.gi.size_comment) != UNZ_OK)
err = UNZ_ERRNO;
if (err == UNZ_OK)
{
/* Search for Zip64 end of central directory header */
central_pos64 = unz64local_SearchCentralDir64(&us.z_filefunc, us.filestream, central_pos);
if (central_pos64)
{
central_pos = central_pos64;
us.isZip64 = 1;
if (ZSEEK64(us.z_filefunc, us.filestream, central_pos, ZLIB_FILEFUNC_SEEK_SET) != 0)
err = UNZ_ERRNO;
/* the signature, already checked */
if (unz64local_getLong(&us.z_filefunc, us.filestream, &uL) != UNZ_OK)
err = UNZ_ERRNO;
/* size of zip64 end of central directory record */
if (unz64local_getLong64(&us.z_filefunc, us.filestream, &uL64) != UNZ_OK)
err = UNZ_ERRNO;
/* version made by */
if (unz64local_getShort(&us.z_filefunc, us.filestream, &uL) != UNZ_OK)
err = UNZ_ERRNO;
/* version needed to extract */
if (unz64local_getShort(&us.z_filefunc, us.filestream, &uL) != UNZ_OK)
err = UNZ_ERRNO;
/* number of this disk */
if (unz64local_getLong(&us.z_filefunc, us.filestream, &us.number_disk) != UNZ_OK)
err = UNZ_ERRNO;
/* number of the disk with the start of the central directory */
if (unz64local_getLong(&us.z_filefunc, us.filestream, &us.gi.number_disk_with_CD) != UNZ_OK)
err = UNZ_ERRNO;
/* total number of entries in the central directory on this disk */
if (unz64local_getLong64(&us.z_filefunc, us.filestream, &us.gi.number_entry) != UNZ_OK)
err = UNZ_ERRNO;
/* total number of entries in the central directory */
if (unz64local_getLong64(&us.z_filefunc, us.filestream, &number_entry_CD) != UNZ_OK)
err = UNZ_ERRNO;
if (number_entry_CD != us.gi.number_entry)
err = UNZ_BADZIPFILE;
/* size of the central directory */
if (unz64local_getLong64(&us.z_filefunc, us.filestream, &us.size_central_dir) != UNZ_OK)
err = UNZ_ERRNO;
/* offset of start of central directory with respect to the starting disk number */
if (unz64local_getLong64(&us.z_filefunc, us.filestream, &us.offset_central_dir) != UNZ_OK)
err = UNZ_ERRNO;
}
else if ((us.gi.number_entry == 0xffff) || (us.size_central_dir == 0xffff) || (us.offset_central_dir == 0xffffffff))
err = UNZ_BADZIPFILE;
}
}
else
err = UNZ_ERRNO;
if ((err == UNZ_OK) && (central_pos < us.offset_central_dir + us.size_central_dir))
err = UNZ_BADZIPFILE;
if (err != UNZ_OK)
{
ZCLOSE64(us.z_filefunc, us.filestream);
return NULL;
}
if (us.gi.number_disk_with_CD == 0)
{
/* If there is only one disk open another stream so we don't have to seek between the CD
and the file headers constantly */
filestream = ZOPEN64(us.z_filefunc, path, ZLIB_FILEFUNC_MODE_READ | ZLIB_FILEFUNC_MODE_EXISTING);
if (filestream != NULL)
us.filestream = filestream;
}
/* Hack for zip files that have no respect for zip64
if ((central_pos > 0xffffffff) && (us.offset_central_dir < 0xffffffff))
us.offset_central_dir = central_pos - us.size_central_dir;*/
us.byte_before_the_zipfile = central_pos - (us.offset_central_dir + us.size_central_dir);
us.central_pos = central_pos;
us.pfile_in_zip_read = NULL;
s = (unz64_s*)ALLOC(sizeof(unz64_s));
if (s != NULL)
{
*s = us;
unzGoToFirstFile((unzFile)s);
}
return (unzFile)s;
}
extern unzFile ZEXPORT unzOpen2(const char *path, 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 unzOpenInternal(path, &zlib_filefunc64_32_def_fill);
}
return unzOpenInternal(path, NULL);
}
extern unzFile ZEXPORT unzOpen2_64(const void *path, 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 unzOpenInternal(path, &zlib_filefunc64_32_def_fill);
}
return unzOpenInternal(path, NULL);
}
extern unzFile ZEXPORT unzOpen(const char *path)
{
return unzOpenInternal(path, NULL);
}
extern unzFile ZEXPORT unzOpen64(const void *path)
{
return unzOpenInternal(path, NULL);
}
extern int ZEXPORT unzClose(unzFile file)
{
unz64_s* s;
if (file == NULL)
return UNZ_PARAMERROR;
s = (unz64_s*)file;
if (s->pfile_in_zip_read != NULL)
unzCloseCurrentFile(file);
if ((s->filestream != NULL) && (s->filestream != s->filestream_with_CD))
ZCLOSE64(s->z_filefunc, s->filestream);
if (s->filestream_with_CD != NULL)
ZCLOSE64(s->z_filefunc, s->filestream_with_CD);
s->filestream = NULL;
s->filestream_with_CD = NULL;
TRYFREE(s);
return UNZ_OK;
}
/* Goto to the next available disk for spanned archives */
local int unzGoToNextDisk OF((unzFile file));
local int unzGoToNextDisk(unzFile file)
{
unz64_s* s;
uLong number_disk_next = 0;
s = (unz64_s*)file;
if (s == NULL)
return UNZ_PARAMERROR;
number_disk_next = s->number_disk;
if ((s->pfile_in_zip_read != NULL) && (s->pfile_in_zip_read->rest_read_uncompressed > 0))
/* We are currently reading a file and we need the next sequential disk */
number_disk_next += 1;
else
/* Goto the disk for the current file */
number_disk_next = s->cur_file_info.disk_num_start;
if (number_disk_next != s->number_disk)
{
/* Switch disks */
if ((s->filestream != NULL) && (s->filestream != s->filestream_with_CD))
ZCLOSE64(s->z_filefunc, s->filestream);
if (number_disk_next == s->gi.number_disk_with_CD)
{
s->filestream = s->filestream_with_CD;
}
else
{
s->filestream = ZOPENDISK64(s->z_filefunc, s->filestream_with_CD, number_disk_next,
ZLIB_FILEFUNC_MODE_READ | ZLIB_FILEFUNC_MODE_EXISTING);
}
if (s->filestream == NULL)
return UNZ_ERRNO;
s->number_disk = number_disk_next;
}
return UNZ_OK;
}
extern int ZEXPORT unzGetGlobalInfo(unzFile file, unz_global_info* pglobal_info32)
{
unz64_s* s;
if (file == NULL)
return UNZ_PARAMERROR;
s = (unz64_s*)file;
/* to do : check if number_entry is not truncated */
pglobal_info32->number_entry = (uLong)s->gi.number_entry;
pglobal_info32->size_comment = s->gi.size_comment;
pglobal_info32->number_disk_with_CD = s->gi.number_disk_with_CD;
return UNZ_OK;
}
extern int ZEXPORT unzGetGlobalInfo64(unzFile file, unz_global_info64* pglobal_info)
{
unz64_s* s;
if (file == NULL)
return UNZ_PARAMERROR;
s = (unz64_s*)file;
*pglobal_info = s->gi;
return UNZ_OK;
}
extern int ZEXPORT unzGetGlobalComment(unzFile file, char *comment, uLong comment_size)
{
unz64_s* s;
uLong bytes_to_read = comment_size;
if (file == NULL)
return (int)UNZ_PARAMERROR;
s = (unz64_s*)file;
if (bytes_to_read > s->gi.size_comment)
bytes_to_read = s->gi.size_comment;
if (ZSEEK64(s->z_filefunc, s->filestream_with_CD, s->central_pos + 22, ZLIB_FILEFUNC_SEEK_SET) != 0)
return UNZ_ERRNO;
if (bytes_to_read>0)
{
*comment = 0;
if (ZREAD64(s->z_filefunc, s->filestream_with_CD, comment, bytes_to_read) != bytes_to_read)
return UNZ_ERRNO;
}
if ((comment != NULL) && (comment_size > s->gi.size_comment))
*(comment+s->gi.size_comment) = 0;
return (int)bytes_to_read;
}
/* Get Info about the current file in the zipfile, with internal only info */
local int unz64local_GetCurrentFileInfoInternal(unzFile file, unz_file_info64 *pfile_info,
unz_file_info64_internal *pfile_info_internal, char *filename, uLong filename_size, void *extrafield,
uLong extrafield_size, char *comment, uLong comment_size)
{
unz64_s* s;
unz_file_info64 file_info;
unz_file_info64_internal file_info_internal;
ZPOS64_T bytes_to_read;
int err = UNZ_OK;
uLong uMagic;
long lSeek = 0;
ZPOS64_T current_pos = 0;
uLong acc = 0;
uLong uL;
ZPOS64_T uL64;
if (file == NULL)
return UNZ_PARAMERROR;
s = (unz64_s*)file;
if (ZSEEK64(s->z_filefunc, s->filestream_with_CD,
s->pos_in_central_dir + s->byte_before_the_zipfile, ZLIB_FILEFUNC_SEEK_SET) != 0)
err = UNZ_ERRNO;
/* Check the magic */
if (err == UNZ_OK)
{
if (unz64local_getLong(&s->z_filefunc, s->filestream_with_CD, &uMagic) != UNZ_OK)
err = UNZ_ERRNO;
else if (uMagic != CENTRALHEADERMAGIC)
err = UNZ_BADZIPFILE;
}
/* Read central directory header */
if (unz64local_getShort(&s->z_filefunc, s->filestream_with_CD, &file_info.version) != UNZ_OK)
err = UNZ_ERRNO;
if (unz64local_getShort(&s->z_filefunc, s->filestream_with_CD, &file_info.version_needed) != UNZ_OK)
err = UNZ_ERRNO;
if (unz64local_getShort(&s->z_filefunc, s->filestream_with_CD, &file_info.flag) != UNZ_OK)
err = UNZ_ERRNO;
if (unz64local_getShort(&s->z_filefunc, s->filestream_with_CD, &file_info.compression_method) != UNZ_OK)
err = UNZ_ERRNO;
if (unz64local_getLong(&s->z_filefunc, s->filestream_with_CD, &file_info.dosDate) != UNZ_OK)
err = UNZ_ERRNO;
unz64local_DosDateToTmuDate(file_info.dosDate, &file_info.tmu_date);
if (unz64local_getLong(&s->z_filefunc, s->filestream_with_CD, &file_info.crc) != UNZ_OK)
err = UNZ_ERRNO;
if (unz64local_getLong(&s->z_filefunc, s->filestream_with_CD, &uL) != UNZ_OK)
err = UNZ_ERRNO;
file_info.compressed_size = uL;
if (unz64local_getLong(&s->z_filefunc, s->filestream_with_CD, &uL) != UNZ_OK)
err = UNZ_ERRNO;
file_info.uncompressed_size = uL;
if (unz64local_getShort(&s->z_filefunc, s->filestream_with_CD, &file_info.size_filename) != UNZ_OK)
err = UNZ_ERRNO;
if (unz64local_getShort(&s->z_filefunc, s->filestream_with_CD, &file_info.size_file_extra) != UNZ_OK)
err = UNZ_ERRNO;
if (unz64local_getShort(&s->z_filefunc, s->filestream_with_CD, &file_info.size_file_comment) != UNZ_OK)
err = UNZ_ERRNO;
if (unz64local_getShort(&s->z_filefunc, s->filestream_with_CD, &file_info.disk_num_start) != UNZ_OK)
err = UNZ_ERRNO;
if (unz64local_getShort(&s->z_filefunc, s->filestream_with_CD, &file_info.internal_fa) != UNZ_OK)
err = UNZ_ERRNO;
if (unz64local_getLong(&s->z_filefunc, s->filestream_with_CD, &file_info.external_fa) != UNZ_OK)
err = UNZ_ERRNO;
/* Relative offset of local header */
if (unz64local_getLong(&s->z_filefunc, s->filestream_with_CD, &uL) != UNZ_OK)
err = UNZ_ERRNO;
file_info.size_file_extra_internal = 0;
file_info.disk_offset = uL;
file_info_internal.offset_curfile = uL;
#ifdef HAVE_AES
file_info_internal.aes_compression_method = 0;
file_info_internal.aes_encryption_mode = 0;
file_info_internal.aes_version = 0;
#endif
lSeek += file_info.size_filename;
if ((err == UNZ_OK) && (filename != NULL))
{
if (file_info.size_filename < filename_size)
{
*(filename+file_info.size_filename) = 0;
bytes_to_read = file_info.size_filename;
}
else
bytes_to_read = filename_size;
if ((file_info.size_filename > 0) && (filename_size > 0))
if (ZREAD64(s->z_filefunc, s->filestream_with_CD,filename, (uLong)bytes_to_read) != bytes_to_read)
err = UNZ_ERRNO;
lSeek -= (uLong)bytes_to_read;
}
/* Read extrafield */
if ((err == UNZ_OK) && (extrafield != NULL))
{
if (file_info.size_file_extra < extrafield_size)
bytes_to_read = file_info.size_file_extra;
else
bytes_to_read = extrafield_size;
if (lSeek != 0)
{
if (ZSEEK64(s->z_filefunc, s->filestream_with_CD, lSeek, ZLIB_FILEFUNC_SEEK_CUR) == 0)
lSeek=0;
else
err = UNZ_ERRNO;
}
if ((file_info.size_file_extra > 0) && (extrafield_size > 0))
if (ZREAD64(s->z_filefunc, s->filestream_with_CD, extrafield, (uLong)bytes_to_read) != bytes_to_read)
err = UNZ_ERRNO;
lSeek += file_info.size_file_extra - (uLong)bytes_to_read;
}
else
lSeek += file_info.size_file_extra;
if ((err == UNZ_OK) && (file_info.size_file_extra != 0))
{
if (lSeek != 0)
{
if (ZSEEK64(s->z_filefunc, s->filestream_with_CD, lSeek, ZLIB_FILEFUNC_SEEK_CUR) == 0)
lSeek=0;
else
err = UNZ_ERRNO;
}
/* We are going to parse the extra field so we need to move back */
current_pos = ZTELL64(s->z_filefunc, s->filestream_with_CD);
if (current_pos < file_info.size_file_extra)
err = UNZ_ERRNO;
current_pos -= file_info.size_file_extra;
if (ZSEEK64(s->z_filefunc, s->filestream_with_CD, current_pos, ZLIB_FILEFUNC_SEEK_SET) != 0)
err = UNZ_ERRNO;
while((err != UNZ_ERRNO) && (acc < file_info.size_file_extra))
{
uLong headerid;
uLong datasize;
if (unz64local_getShort(&s->z_filefunc, s->filestream_with_CD, &headerid) != UNZ_OK)
err = UNZ_ERRNO;
if (unz64local_getShort(&s->z_filefunc, s->filestream_with_CD, &datasize) != UNZ_OK)
err = UNZ_ERRNO;
/* ZIP64 extra fields */
if (headerid == 0x0001)
{
/* Subtract size of ZIP64 field, since ZIP64 is handled internally */
file_info.size_file_extra_internal += 2 + 2 + datasize;
if (file_info.uncompressed_size == 0xffffffff)
{
if (unz64local_getLong64(&s->z_filefunc, s->filestream_with_CD, &file_info.uncompressed_size) != UNZ_OK)
err = UNZ_ERRNO;
}
if (file_info.compressed_size == 0xffffffff)
{
if (unz64local_getLong64(&s->z_filefunc, s->filestream_with_CD, &file_info.compressed_size) != UNZ_OK)
err = UNZ_ERRNO;
}
if (file_info_internal.offset_curfile == 0xffffffff)
{
/* Relative Header offset */
if (unz64local_getLong64(&s->z_filefunc, s->filestream_with_CD, &uL64) != UNZ_OK)
err = UNZ_ERRNO;
file_info_internal.offset_curfile = uL64;
file_info.disk_offset = uL64;
}
if (file_info.disk_num_start == 0xffffffff)
{
/* Disk Start Number */
if (unz64local_getLong(&s->z_filefunc, s->filestream_with_CD, &file_info.disk_num_start) != UNZ_OK)
err = UNZ_ERRNO;
}
}
#ifdef HAVE_AES
/* AES header */
else if (headerid == 0x9901)
{
/* Subtract size of AES field, since AES is handled internally */
file_info.size_file_extra_internal += 2 + 2 + datasize;
/* Verify version info */
if (unz64local_getShort(&s->z_filefunc, s->filestream_with_CD, &uL) != UNZ_OK)
err = UNZ_ERRNO;
/* Support AE-1 and AE-2 */
if (uL != 1 && uL != 2)
err = UNZ_ERRNO;
file_info_internal.aes_version = uL;
if (unz64local_getByte(&s->z_filefunc, s->filestream_with_CD, &uL) != UNZ_OK)
err = UNZ_ERRNO;
if ((char)uL != 'A')
err = UNZ_ERRNO;
if (unz64local_getByte(&s->z_filefunc, s->filestream_with_CD, &uL) != UNZ_OK)
err = UNZ_ERRNO;
if ((char)uL != 'E')
err = UNZ_ERRNO;
/* Get AES encryption strength and actual compression method */
if (unz64local_getByte(&s->z_filefunc, s->filestream_with_CD, &uL) != UNZ_OK)
err = UNZ_ERRNO;
file_info_internal.aes_encryption_mode = uL;
if (unz64local_getShort(&s->z_filefunc, s->filestream_with_CD, &uL) != UNZ_OK)
err = UNZ_ERRNO;
file_info_internal.aes_compression_method = uL;
}
#endif
else
{
if (ZSEEK64(s->z_filefunc, s->filestream_with_CD,datasize, ZLIB_FILEFUNC_SEEK_CUR) != 0)
err = UNZ_ERRNO;
}
acc += 2 + 2 + datasize;
}
}
if (file_info.disk_num_start == s->gi.number_disk_with_CD)
file_info_internal.byte_before_the_zipfile = s->byte_before_the_zipfile;
else
file_info_internal.byte_before_the_zipfile = 0;
if ((err == UNZ_OK) && (comment != NULL))
{
if (file_info.size_file_comment < comment_size)
{
*(comment+file_info.size_file_comment) = 0;
bytes_to_read = file_info.size_file_comment;
}
else
bytes_to_read = comment_size;
if (lSeek != 0)
{
if (ZSEEK64(s->z_filefunc, s->filestream_with_CD, lSeek, ZLIB_FILEFUNC_SEEK_CUR) != 0)
err = UNZ_ERRNO;
}
if ((file_info.size_file_comment > 0) && (comment_size > 0))
if (ZREAD64(s->z_filefunc, s->filestream_with_CD, comment, (uLong)bytes_to_read) != bytes_to_read)
err = UNZ_ERRNO;
lSeek += file_info.size_file_comment - (uLong)bytes_to_read;
}
else
lSeek += file_info.size_file_comment;
if ((err == UNZ_OK) && (pfile_info != NULL))
*pfile_info = file_info;
if ((err == UNZ_OK) && (pfile_info_internal != NULL))
*pfile_info_internal = file_info_internal;
return err;
}
extern int ZEXPORT unzGetCurrentFileInfo(unzFile file, unz_file_info * pfile_info, char *filename,
uLong filename_size, void *extrafield, uLong extrafield_size, char* comment, uLong comment_size)
{
unz_file_info64 file_info64;
int err;
err = unz64local_GetCurrentFileInfoInternal(file, &file_info64, NULL, filename, filename_size,
extrafield, extrafield_size, comment, comment_size);
if ((err == UNZ_OK) && (pfile_info != NULL))
{
pfile_info->version = file_info64.version;
pfile_info->version_needed = file_info64.version_needed;
pfile_info->flag = file_info64.flag;
pfile_info->compression_method = file_info64.compression_method;
pfile_info->dosDate = file_info64.dosDate;
pfile_info->crc = file_info64.crc;
pfile_info->size_filename = file_info64.size_filename;
pfile_info->size_file_extra = file_info64.size_file_extra - file_info64.size_file_extra_internal;
pfile_info->size_file_comment = file_info64.size_file_comment;
pfile_info->disk_num_start = file_info64.disk_num_start;
pfile_info->internal_fa = file_info64.internal_fa;
pfile_info->external_fa = file_info64.external_fa;
pfile_info->tmu_date = file_info64.tmu_date,
pfile_info->compressed_size = (uLong)file_info64.compressed_size;
pfile_info->uncompressed_size = (uLong)file_info64.uncompressed_size;
}
return err;
}
extern int ZEXPORT unzGetCurrentFileInfo64(unzFile file, unz_file_info64 * pfile_info, char *filename,
uLong filename_size, void *extrafield, uLong extrafield_size, char* comment, uLong comment_size)
{