/*
* Extract RAR archives
*
* Copyright (C) 2005 trog@uncon.org
*
* This code is based on the work of Alexander L. Roshal
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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 UNRAR_H
#define UNRAR_H 1
#include <sys/types.h>
#include <unistd.h>
/* #define RAR_DEBUG */
/* #define RAR_HIGH_DEBUG */
struct unpack_data_tag;
#include "unrarppm.h"
#include "unrarvm.h"
#include "unrarcmd.h"
#include "unrarfilter.h"
#include "clamav.h"
#define FALSE (0)
#define TRUE (1)
#ifndef MIN
#define MIN(a,b) ((a < b) ? a : b)
#endif
typedef struct rar_metadata_tag
{
uint32_t pack_size;
uint32_t unpack_size;
uint32_t crc;
int encrypted;
uint8_t method;
unsigned char *filename;
struct rar_metadata_tag *next;
} rar_metadata_t;
#define SIZEOF_MARKHEAD 7
#define SIZEOF_NEWMHD 13
#define SIZEOF_NEWLHD 32
#define SIZEOF_SHORTBLOCKHEAD 7
#define SIZEOF_LONGBLOCKHEAD 11
#define SIZEOF_SUBBLOCKHEAD 14
#define SIZEOF_COMMHEAD 13
#define SIZEOF_PROTECTHEAD 26
#define SIZEOF_AVHEAD 14
#define SIZEOF_SIGNHEAD 15
#define SIZEOF_UOHEAD 18
#define SIZEOF_MACHEAD 22
#define SIZEOF_EAHEAD 24
#define SIZEOF_BEEAHEAD 24
#define SIZEOF_STREAMHEAD 26
#define MHD_VOLUME 0x0001
#define MHD_COMMENT 0x0002
#define MHD_LOCK 0x0004
#define MHD_SOLID 0x0008
#define MHD_PACK_COMMENT 0x0010
#define MHD_NEWNUMBERING 0x0010
#define MHD_AV 0x0020
#define MHD_PROTECT 0x0040
#define MHD_PASSWORD 0x0080
#define MHD_FIRSTVOLUME 0x0100
#define LHD_SPLIT_BEFORE 0x0001
#define LHD_SPLIT_AFTER 0x0002
#define LHD_PASSWORD 0x0004
#define LHD_COMMENT 0x0008
#define LHD_SOLID 0x0010
#define LONG_BLOCK 0x8000
#define NC 299 /* alphabet = {0, 1, 2, ..., NC - 1} */
#define DC 60
#define RC 28
#define LDC 17
#define BC 20
#define HUFF_TABLE_SIZE (NC+DC+RC+LDC)
#define MAX_BUF_SIZE 32768
#define MAXWINSIZE 0x400000
#define MAXWINMASK (MAXWINSIZE-1)
#define LOW_DIST_REP_COUNT 16
typedef struct mark_header_tag
{
unsigned char mark[SIZEOF_MARKHEAD];
} mark_header_t;
typedef struct main_header_tag
{
uint16_t head_crc __attribute__ ((packed));
uint8_t head_type __attribute__ ((packed));
uint16_t flags __attribute__ ((packed));
uint16_t head_size __attribute__ ((packed));
uint16_t reserved __attribute__ ((packed));
uint32_t reserved1 __attribute__ ((packed));
} main_header_t;
typedef struct file_header_tag
{
uint16_t head_crc __attribute__ ((packed));
uint8_t head_type __attribute__ ((packed));
uint16_t flags __attribute__ ((packed));
uint16_t head_size __attribute__ ((packed));
uint32_t pack_size __attribute__ ((packed));
uint32_t unpack_size __attribute__ ((packed));
uint8_t host_os __attribute__ ((packed));
uint32_t file_crc __attribute__ ((packed));
uint32_t file_time __attribute__ ((packed));
uint8_t unpack_ver __attribute__ ((packed));
uint8_t method __attribute__ ((packed));
uint16_t name_size __attribute__ ((packed));
uint32_t file_attr __attribute__ ((packed));
unsigned char *filename __attribute__ ((packed));
off_t next_offset __attribute__ ((packed));
} file_header_t;
struct Decode
{
unsigned int MaxNum;
unsigned int DecodeLen[16];
unsigned int DecodePos[16];
unsigned int DecodeNum[2];
};
struct LitDecode
{
unsigned int MaxNum;
unsigned int DecodeLen[16];
unsigned int DecodePos[16];
unsigned int DecodeNum[NC];
};
struct DistDecode
{
unsigned int MaxNum;
unsigned int DecodeLen[16];
unsigned int DecodePos[16];
unsigned int DecodeNum[DC];
};
struct LowDistDecode
{
unsigned int MaxNum;
unsigned int DecodeLen[16];
unsigned int DecodePos[16];
unsigned int DecodeNum[LDC];
};
struct RepDecode
{
unsigned int MaxNum;
unsigned int DecodeLen[16];
unsigned int DecodePos[16];
unsigned int DecodeNum[RC];
};
struct BitDecode
{
unsigned int MaxNum;
unsigned int DecodeLen[16];
unsigned int DecodePos[16];
unsigned int DecodeNum[BC];
};
struct UnpackFilter
{
unsigned int block_start;
unsigned int block_length;
unsigned int exec_count;
int next_window;
struct rarvm_prepared_program prg;
};
/* RAR2 structures */
#define MC20 257
struct MultDecode
{
unsigned int MaxNum;
unsigned int DecodeLen[16];
unsigned int DecodePos[16];
unsigned int DecodeNum[MC20];
};
struct AudioVariables
{
int K1,K2,K3,K4,K5;
int D1,D2,D3,D4;
int last_delta;
unsigned int dif[11];
unsigned int byte_count;
int last_char;
};
/* *************** */
typedef struct unpack_data_tag
{
int ofd;
unsigned char in_buf[MAX_BUF_SIZE];
uint8_t window[MAXWINSIZE];
int in_addr;
int in_bit;
unsigned int unp_ptr;
unsigned int wr_ptr;
int tables_read;
int read_top;
int read_border;
int unp_block_type;
int prev_low_dist;
int low_dist_rep_count;
unsigned char unp_old_table[HUFF_TABLE_SIZE];
struct LitDecode LD;
struct DistDecode DD;
struct LowDistDecode LDD;
struct RepDecode RD;
struct BitDecode BD;
unsigned int old_dist[4];
unsigned int old_dist_ptr;
unsigned int last_dist;
unsigned int last_length;
ppm_data_t ppm_data;
int ppm_esc_char;
int ppm_error;
rar_filter_array_t Filters;
rar_filter_array_t PrgStack;
int *old_filter_lengths;
int last_filter, old_filter_lengths_size;
int64_t written_size;
int64_t dest_unp_size;
rarvm_data_t rarvm_data;
unsigned int unp_crc;
/* RAR2 variables */
int unp_cur_channel, unp_channel_delta, unp_audio_block, unp_channels;
unsigned char unp_old_table20[MC20 * 4];
struct MultDecode MD[4];
struct AudioVariables audv[4];
/* RAR1 variables */
unsigned int flag_buf, avr_plc, avr_plcb, avr_ln1, avr_ln2, avr_ln3;
int buf60, num_huf, st_mode, lcount, flags_cnt;
unsigned int nhfb, nlzb, max_dist3;
unsigned int chset[256], chseta[256], chsetb[256], chsetc[256];
unsigned int place[256], placea[256], placeb[256], placec[256];
unsigned int ntopl[256], ntoplb[256], ntoplc[256];
} unpack_data_t;
typedef enum
{
ALL_HEAD=0,
MARK_HEAD=0x72,
MAIN_HEAD=0x73,
FILE_HEAD=0x74,
COMM_HEAD=0x75,
AV_HEAD=0x76,
SUB_HEAD=0x77,
PROTECT_HEAD=0x78,
SIGN_HEAD=0x79,
NEWSUB_HEAD=0x7a,
ENDARC_HEAD=0x7b
} header_type;
enum BLOCK_TYPES
{
BLOCK_LZ,
BLOCK_PPM
};
rar_metadata_t *cli_unrar(int fd, const char *dirname, const struct cl_limits *limits);
unsigned int rar_get_char(int fd, unpack_data_t *unpack_data);
void addbits(unpack_data_t *unpack_data, int bits);
unsigned int getbits(unpack_data_t *unpack_data);
int unp_read_buf(int fd, unpack_data_t *unpack_data);
void unpack_init_data(int solid, unpack_data_t *unpack_data);
void make_decode_tables(unsigned char *len_tab, struct Decode *decode, int size);
void unp_write_buf_old(unpack_data_t *unpack_data);
int decode_number(unpack_data_t *unpack_data, struct Decode *decode);
#endif