/*

  *  Copyright (C) 2013-2019 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
  *  Copyright (C) 2007-2013 Sourcefire, Inc.

  *
  *  Authors: Alberto Wu

  *
  *  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 "others.h"
 

 typedef int (*zip_cb)(int fd, const char *filepath, cli_ctx *ctx);

 #define zip_scan_cb cli_magic_scandesc
 

 #define MAX_ZIP_REQUESTS 10
 struct zip_requests {
     const char *names[MAX_ZIP_REQUESTS];
     size_t namelens[MAX_ZIP_REQUESTS];
     int namecnt;
 
     uint32_t loff;
     int found, match;
 };
 

 cl_error_t cli_unzip(cli_ctx *);
 cl_error_t unzip_single_internal(cli_ctx *, off_t, zip_cb);
 cl_error_t cli_unzip_single(cli_ctx *, off_t);

 cl_error_t unzip_search_add(struct zip_requests *, const char *, size_t);
 cl_error_t unzip_search(cli_ctx *, fmap_t *, struct zip_requests *);
 cl_error_t unzip_search_single(cli_ctx *, const char *, size_t, uint32_t *);

 // clang-format off

 #ifdef UNZIP_PRIVATE
 #define F_ENCR  (1<<0)
 #define F_ALGO1 (1<<1)
 #define F_ALGO2 (1<<2)
 #define F_USEDD (1<<3)
 #define F_RSVD1 (1<<4)
 #define F_PATCH (1<<5)
 #define F_STRNG (1<<6)
 #define F_UNUS1 (1<<7)
 #define F_UNUS2 (1<<8)
 #define F_UNUS3 (1<<9)
 #define F_UNUS4 (1<<10)
 #define F_UTF8  (1<<11)
 #define F_RSVD2 (1<<12)
 #define F_MSKED (1<<13)
 #define F_RSVD3 (1<<14)
 #define F_RSVD4 (1<<15)

 // clang-format on

 
 enum ALGO {

     ALG_STORED,
     ALG_SHRUNK,
     ALG_REDUCE1,
     ALG_REDUCE2,
     ALG_REDUCE3,
     ALG_REDUCE4,
     ALG_IMPLODE,
     ALG_TOKENZD,
     ALG_DEFLATE,
     ALG_DEFLATE64,
     ALG_OLDTERSE,
     ALG_RSVD1,
     ALG_BZIP2,
     ALG_RSVD2,
     ALG_LZMA,
     ALG_RSVD3,
     ALG_RSVD4,
     ALG_RSVD5,
     ALG_NEWTERSE,
     ALG_LZ77,
     ALG_WAVPACK = 97,
     ALG_PPMD

 };
 

 /*
  * Local File Header format:
  */

 /* struct LH { */
 /*   uint32_t magic; */
 /*   uint16_t version; */
 /*   uint16_t flags; */
 /*   uint16_t method; */
 /*   uint32_t mtime; */
 /*   uint32_t crc32; */
 /*   uint32_t csize; */
 /*   uint32_t usize; */
 /*   uint16_t flen; */
 /*   uint16_t elen; */
 /*   char fname[flen] */
 /*   char extra[elen] */
 /* } __attribute__((packed)); */
 

 /*
  * Local File Header convenience macros:
  */
 // clang-format off
 #define LOCAL_HEADER_magic   ((uint32_t)cli_readint32((uint8_t *)(local_header)+0))
 #define LOCAL_HEADER_version ((uint16_t)cli_readint16((uint8_t *)(local_header)+4))
 #define LOCAL_HEADER_flags   ((uint16_t)cli_readint16((uint8_t *)(local_header)+6))
 #define LOCAL_HEADER_method  ((uint16_t)cli_readint16((uint8_t *)(local_header)+8))
 #define LOCAL_HEADER_mtime   ((uint32_t)cli_readint32((uint8_t *)(local_header)+10))
 #define LOCAL_HEADER_crc32   ((uint32_t)cli_readint32((uint8_t *)(local_header)+14))
 #define LOCAL_HEADER_csize   ((uint32_t)cli_readint32((uint8_t *)(local_header)+18))
 #define LOCAL_HEADER_usize   ((uint32_t)cli_readint32((uint8_t *)(local_header)+22))
 #define LOCAL_HEADER_flen    ((uint16_t)cli_readint16((uint8_t *)(local_header)+26))
 #define LOCAL_HEADER_elen    ((uint16_t)cli_readint16((uint8_t *)(local_header)+28))
 #define SIZEOF_LOCAL_HEADER 30
 // clang-format on

 /*
  * Central Directory File Header format:
  */

 /* struct CH { */
 /*   uint32_t magic; */
 /*   uint16_t vermade; */
 /*   uint16_t verneed; */
 /*   uint16_t flags; */
 /*   uint16_t method; */
 /*   uint32_t mtime; */
 /*   uint32_t crc32; */
 /*   uint32_t csize; */
 /*   uint32_t usize; */
 /*   uint16_t flen; */
 /*   uint16_t elen; */
 /*   uint16_t clen; */
 /*   uint16_t dsk; */
 /*   uint16_t iattrib; */
 /*   uint32_t eattrib; */
 /*   uint32_t off; */
 /*   char fname[flen] */
 /*   char extra[elen] */
 /*   char comment[clen] */
 /* } __attribute__((packed)); */
 

 /*
  * Central Directory File Header convenience macro's:
  */
 // clang-format off
 #define CENTRAL_HEADER_magic        ((uint32_t)cli_readint32((uint8_t *)(central_header)+0))
 #define CENTRAL_HEADER_vermade      ((uint16_t)cli_readint16((uint8_t *)(central_header)+4))
 #define CENTRAL_HEADER_verneed      ((uint16_t)cli_readint16((uint8_t *)(central_header)+6))
 #define CENTRAL_HEADER_flags        ((uint16_t)cli_readint16((uint8_t *)(central_header)+8))
 #define CENTRAL_HEADER_method       ((uint16_t)cli_readint16((uint8_t *)(central_header)+10))
 #define CENTRAL_HEADER_mtime        ((uint32_t)cli_readint32((uint8_t *)(central_header)+12))
 #define CENTRAL_HEADER_crc32        ((uint32_t)cli_readint32((uint8_t *)(central_header)+16))
 #define CENTRAL_HEADER_csize        ((uint32_t)cli_readint32((uint8_t *)(central_header)+20))
 #define CENTRAL_HEADER_usize        ((uint32_t)cli_readint32((uint8_t *)(central_header)+24))
 #define CENTRAL_HEADER_flen         ((uint16_t)cli_readint16((uint8_t *)(central_header)+28))
 #define CENTRAL_HEADER_extra_len    ((uint16_t)cli_readint16((uint8_t *)(central_header)+30))
 #define CENTRAL_HEADER_comment_len  ((uint16_t)cli_readint16((uint8_t *)(central_header)+32))
 #define CENTRAL_HEADER_disk_num     ((uint16_t)cli_readint16((uint8_t *)(central_header)+34))
 #define CENTRAL_HEADER_iattrib      ((uint16_t)cli_readint16((uint8_t *)(central_header)+36))
 #define CENTRAL_HEADER_eattrib      ((uint32_t)cli_readint32((uint8_t *)(central_header)+38))
 #define CENTRAL_HEADER_off          ((uint32_t)cli_readint32((uint8_t *)(central_header)+42))
 // clang-format on
 
 #define SIZEOF_CENTRAL_HEADER 46
 #define SIZEOF_ENCRYPTION_HEADER 12

 #endif /* UNZIP_PRIVATE */
 
 #endif /* __UNZIP_H */