| /* |
| * Copyright (C) 2003 - 2006 Tomasz Kojm <tkojm@clamav.net> |
| * (C) 2006 Sensory Networks, Inc. |
| * |
| * The code of this module was based on zziplib 0.12.83: |
| * (c) 1999 - 2002 Guido Draheim <guidod@gmx.de>, published under |
| * the Lesser GNU General Public License |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
| * MA 02110-1301, USA. |
| */ |
| |
| #ifndef __UNZIP_H |
| #define __UNZIP_H |
| |
| #if HAVE_CONFIG_H |
| #include "clamav-config.h" |
| #endif |
| |
| #include <stddef.h> |
| #include <stdio.h> |
| #include <sys/types.h> |
| |
| #include "cltypes.h" |
| |
| #ifndef HAVE_ATTRIB_PACKED |
| #define __attribute__(x) |
| #endif |
| |
| #ifdef HAVE_PRAGMA_PACK |
| #pragma pack(1) |
| #endif |
| |
| #ifdef HAVE_PRAGMA_PACK_HPPA |
| #pragma pack 1 |
| #endif |
| |
| /******** Zip format structures *********/ |
| |
| /* Local file header */ |
| struct zip_file_header |
| { |
| # define ZIP_FILE_HEADER_MAGIC 0x04034b50 |
| uint32_t z_magic; /* local file header signature */ |
| uint16_t z_version; /* version needed to extract */ |
| uint16_t z_flags; /* general purpose bit flag */ |
| uint16_t z_compr; /* compression method */ |
| uint16_t z_modtime; /* last mod file time */ |
| uint16_t z_moddate; /* last mod file date */ |
| uint32_t z_crc32; /* crc-32 */ |
| uint32_t z_csize; /* compressed size */ |
| uint32_t z_usize; /* uncompressed size */ |
| uint16_t z_namlen; /* file name length */ |
| uint16_t z_extras; /* extra field length */ |
| |
| /* followed by filename (of variable size) */ |
| /* followed by extra field (of variable size) */ |
| } __attribute__((packed)); |
| |
| /* Data descriptor (only if bit 3 of z_flags is set) */ |
| struct zip_file_trailer |
| { |
| # define ZIP_FILE_TRAILER_MAGIC 0x08074B50 |
| uint32_t z_magic; /* data descriptor signature (0x08074b50) */ |
| uint32_t z_crc32; /* crc-32 */ |
| uint32_t z_csize; /* compressed size */ |
| uint32_t z_usize; /* uncompressed size */ |
| } __attribute__((packed)); |
| |
| /* Central file header */ |
| struct zip_root_dirent |
| { |
| # define ZIP_ROOT_DIRENT_MAGIC 0x02014b50 |
| uint32_t z_magic; /* central file header signature */ |
| uint16_t z_version1; /* version made by */ |
| uint16_t z_version2; /* version needed to extract */ |
| uint16_t z_flags; /* general purpose bit flag */ |
| uint16_t z_compr; /* compression method */ |
| uint16_t z_modtime; /* last mod file time */ |
| uint16_t z_moddate; /* last mod file date */ |
| uint32_t z_crc32; /* crc-32 */ |
| uint32_t z_csize; /* compressed size */ |
| uint32_t z_usize; /* uncompressed size */ |
| uint16_t z_namlen; /* file name length */ |
| uint16_t z_extras; /* extra field length */ |
| uint16_t z_comment; /* file comment length */ |
| uint16_t z_diskstart; /* disk number start */ |
| uint16_t z_filetype; /* internal file attributes */ |
| uint32_t z_filemode; /* extrnal file attributes */ |
| uint32_t z_off; /* relative offset of local header */ |
| |
| /* followed by filename (of variable size) */ |
| /* followed by extra field (of variable size) */ |
| /* followed by file comment (of variable size) */ |
| } __attribute__((packed)); |
| |
| /* End of central directory record */ |
| struct zip_disk_trailer |
| { |
| # define ZIP_DISK_TRAILER_MAGIC 0x06054b50 |
| uint32_t z_magic; /* end of central dir signature */ |
| uint16_t z_disk; /* number of this disk */ |
| uint16_t z_finaldisk; /* number of the disk with the start |
| * of the central dir |
| */ |
| uint16_t z_entries; /* total number of entries in the |
| * central dir on this disk |
| */ |
| uint16_t z_finalentries; /* total number of entries in the |
| * central dir |
| */ |
| uint32_t z_rootsize; /* size of the central directory */ |
| uint32_t z_rootseek; /* offset of start of central directory |
| * with respect to the starting disk |
| * number |
| */ |
| uint16_t z_comment; /* zipfile comment length */ |
| |
| /* followed by zipfile comment (of variable size) */ |
| } __attribute__((packed)); |
| |
| #define ZIP_METHOD_STORED 0 |
| #define ZIP_METHOD_SHRUNK 1 |
| #define ZIP_METHOD_REDUCEDx1 2 |
| #define ZIP_METHOD_REDUCEDx2 3 |
| #define ZIP_METHOD_REDUCEDx3 4 |
| #define ZIP_METHOD_REDUCEDx4 5 |
| #define ZIP_METHOD_IMPLODED 6 |
| #define ZIP_METHOD_TOKENIZED 7 |
| #define ZIP_METHOD_DEFLATED 8 |
| #define ZIP_METHOD_DEFLATED64 9 |
| #define ZIP_METHOD_IMPLODED_DCL 10 |
| #define ZIP_METHOD_BZIP2 12 |
| #define ZIP_METHOD_AES 99 |
| |
| |
| /******** Internal structures *********/ |
| |
| struct __zip_file |
| { |
| struct __zip_dir *dir; |
| uint16_t method; |
| int16_t *bf; |
| size_t restlen; |
| size_t crestlen; |
| size_t usize; |
| size_t csize; |
| char *buf32k; |
| z_stream d_stream; |
| }; |
| |
| struct __zip_dir_hdr |
| { |
| uint32_t d_usize; /* uncompressed size */ |
| uint32_t d_csize; /* compressed size */ |
| uint32_t d_crc32; /* crc-32 */ |
| uint32_t d_off; /* offset of file in zipfile */ |
| uint16_t d_reclen; /* next dir_hdr structure offset */ |
| uint16_t d_namlen; /* explicit namelen of d_name */ |
| uint16_t d_compr; /* compression type */ |
| int16_t d_bf[2]; /* compression type/brute force */ |
| uint16_t d_flags; /* general purpose flags */ |
| char d_name[1]; /* actual name of the entry */ |
| }; |
| |
| struct __zip_dirent |
| { |
| uint16_t d_compr; /* compression method */ |
| uint32_t d_csize; /* compressed size */ |
| uint32_t st_size; /* file size / decompressed size */ |
| uint16_t d_flags; /* general purpose flags */ |
| char *d_name; /* file name / strdupped name */ |
| uint32_t d_crc32; /* crc-32 */ |
| uint32_t d_off; /* the offset in the file */ |
| }; |
| |
| struct __zip_dir |
| { |
| int fd; |
| int errcode; |
| struct { |
| struct __zip_file *fp; |
| char *buf32k; |
| } cache; |
| struct __zip_dir_hdr *hdr0; |
| struct __zip_dir_hdr *hdr; |
| struct __zip_dirent dirent; |
| }; |
| |
| /* typedefs */ |
| typedef struct __zip_dir zip_dir; |
| typedef struct __zip_dir_hdr zip_dir_hdr; |
| typedef struct __zip_file zip_file; |
| typedef struct __zip_dirent zip_dirent; |
| |
| zip_dir *zip_dir_open(int fd, off_t start, int *errcode_p); |
| int zip_dir_read(zip_dir *dir, zip_dirent *d); |
| zip_file *zip_file_open(zip_dir *dir, const char *name, int d_off); |
| ssize_t zip_file_read(zip_file *fp, char *buf, size_t len); |
| int zip_file_close(zip_file *fp); |
| int zip_dir_close(zip_dir *dir); |
| |
| #ifdef HAVE_PRAGMA_PACK |
| #pragma pack() |
| #endif |
| |
| #ifdef HAVE_PRAGMA_PACK_HPPA |
| #pragma pack |
| #endif |
| |
| #endif /* __UNZIP_H */ |
