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120 lines
3.3 KiB
120 lines
3.3 KiB
/*
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* Extract component parts of MS CHM files
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*
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* Copyright (C) 2007-2008 Sourcefire, Inc.
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*
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* Authors: Trog
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#ifndef __CHM_UNPACK_H
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#define __CHM_UNPACK_H
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#if HAVE_CONFIG_H
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#include "clamav-config.h"
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#endif
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#include "cltypes.h"
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#ifndef HAVE_ATTRIB_PACKED
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#define __attribute__(x)
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#endif
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#ifdef HAVE_PRAGMA_PACK
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#pragma pack(1)
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#endif
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#ifdef HAVE_PRAGMA_PACK_HPPA
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#pragma pack 1
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#endif
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#define CHM_ITSF_MIN_LEN (0x60)
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typedef struct chm_itsf_header_tag
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{
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unsigned char signature[4];
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int32_t version __attribute__ ((packed));
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int32_t header_len __attribute__ ((packed));
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uint32_t unknown __attribute__ ((packed));
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uint32_t last_modified __attribute__ ((packed));
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uint32_t lang_id __attribute__ ((packed));
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unsigned char dir_clsid[16];
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unsigned char stream_clsid[16];
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uint64_t sec0_offset __attribute__ ((packed));
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uint64_t sec0_len __attribute__ ((packed));
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uint64_t dir_offset __attribute__ ((packed));
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uint64_t dir_len __attribute__ ((packed));
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uint64_t data_offset __attribute__ ((packed));
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} chm_itsf_header_t;
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#define CHM_ITSP_LEN (0x54)
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typedef struct chm_itsp_header_tag
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{
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unsigned char signature[4];
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int32_t version __attribute__ ((packed));
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int32_t header_len __attribute__ ((packed));
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int32_t unknown1 __attribute__ ((packed));
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uint32_t block_len __attribute__ ((packed));
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int32_t blockidx_intvl __attribute__ ((packed));
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int32_t index_depth __attribute__ ((packed));
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int32_t index_root __attribute__ ((packed));
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int32_t index_head __attribute__ ((packed));
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int32_t index_tail __attribute__ ((packed));
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int32_t unknown2 __attribute__ ((packed));
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uint32_t num_blocks __attribute__ ((packed));
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uint32_t lang_id __attribute__ ((packed));
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unsigned char system_clsid[16];
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unsigned char unknown4[16];
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} chm_itsp_header_t;
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#ifdef HAVE_PRAGMA_PACK
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#pragma pack()
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#endif
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#ifdef HAVE_PRAGMA_PACK_HPPA
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#pragma pack
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#endif
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typedef struct chm_sys_entry_tag
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{
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uint64_t offset;
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uint64_t length;
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} chm_sys_entry_t;
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typedef struct chm_metadata_tag {
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uint64_t file_length;
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uint64_t file_offset;
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chm_sys_entry_t sys_control;
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chm_sys_entry_t sys_content;
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chm_sys_entry_t sys_reset;
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off_t m_length;
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char *m_area;
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chm_itsf_header_t itsf_hdr;
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chm_itsp_header_t itsp_hdr;
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int ufd;
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int ofd;
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uint32_t num_chunks;
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off_t chunk_offset;
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char *chunk_data;
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char *chunk_current;
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char *chunk_end;
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uint16_t chunk_entries;
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} chm_metadata_t;
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int cli_chm_open(int fd, const char *dirname, chm_metadata_t *metadata);
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int cli_chm_prepare_file(int fd, char *dirname, chm_metadata_t *metadata);
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int cli_chm_extract_file(int fd, char *dirname, chm_metadata_t *metadata);
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void cli_chm_close(chm_metadata_t *metadata);
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#endif
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