100 lines
3.3 KiB
C
100 lines
3.3 KiB
C
/*
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File: file_pdb.c
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Copyright (C) 2018 Christophe GRENIER <grenier@cgsecurity.org>
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This software is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License along
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with this program; if not, write the Free Software Foundation, Inc., 51
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Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#if !defined(SINGLE_FORMAT) || defined(SINGLE_FORMAT_pdb)
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#include <stdio.h>
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#include "types.h"
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#include "filegen.h"
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static void register_header_check_pdb(file_stat_t *file_stat);
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const file_hint_t file_hint_pdb= {
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.extension="pdb",
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.description="Protein Data Bank data",
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.max_filesize=PHOTOREC_MAX_FILE_SIZE,
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.recover=1,
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.enable_by_default=1,
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.register_header_check=®ister_header_check_pdb
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};
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static data_check_t data_check_pdb(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery)
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{
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unsigned int i;
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for(i=buffer_size/2; i<buffer_size; i++)
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if(buffer[i]==0)
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{
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file_recovery->calculated_file_size+=i;
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return DC_STOP;
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}
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file_recovery->calculated_file_size+=buffer_size/2;
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return DC_CONTINUE;
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}
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static void file_check_pdb(file_recovery_t *file_recovery)
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{
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unsigned char buffer[512];
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if(my_fseek(file_recovery->handle, 0, SEEK_SET) < 0 ||
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fread(&buffer, 1, sizeof(buffer), file_recovery->handle) < 82)
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return ;
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if(buffer[80]=='\r' && buffer[81]=='\n')
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file_recovery->file_size=file_recovery->calculated_file_size/82*82;
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else if(buffer[80]=='\n')
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file_recovery->file_size=file_recovery->calculated_file_size/81*81;
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else
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file_recovery->file_size=0;
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}
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static int header_check_pdb(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new)
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{
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/* Check date */
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if(buffer[0x32] < '0' || buffer[0x32] > '9' || buffer[0x33] < '0' || buffer[0x33] > '9')
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return 0;
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if(buffer[0x34]!='-')
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return 0;
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if(buffer[0x35] < 'A' || buffer[0x35] > 'Z' || buffer[0x36] < 'A' || buffer[0x36] > 'Z' || buffer[0x37] < 'A' || buffer[0x37] > 'Z')
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return 0;
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if(buffer[0x38]!='-')
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return 0;
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if(buffer[0x39] < '0' || buffer[0x39] > '9' || buffer[0x3a] < '0' || buffer[0x3a] > '9')
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return 0;
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/* Check space */
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if(buffer[59]!=' ' || buffer[60]!=' ' || buffer[61]!=' ' || buffer[66]!=' ' || buffer[67]!=' ' || buffer[68]!=' ' || buffer[69]!=' ')
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return 0;
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reset_file_recovery(file_recovery_new);
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file_recovery_new->extension=file_hint_pdb.extension;
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file_recovery_new->data_check=&data_check_pdb;
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file_recovery_new->file_check=&file_check_pdb;
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file_recovery_new->min_filesize=80;
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return 1;
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}
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static void register_header_check_pdb(file_stat_t *file_stat)
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{
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register_header_check(0, "HEADER ", 10, &header_check_pdb, file_stat);
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}
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#endif
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