summaryrefslogtreecommitdiffstats
path: root/src/file_ps.c
diff options
context:
space:
mode:
authorChristophe Grenier <grenier@cgsecurity.org>2007-10-29 22:38:52 +0100
committerChristophe Grenier <grenier@cgsecurity.org>2007-10-29 22:38:52 +0100
commit9928d99936105b4653d2d1b8ca74dc3ffba5c71e (patch)
tree06aa4f5e9f0055027c6fb54dd47a8414cf2fba32 /src/file_ps.c
First version in git
Diffstat (limited to 'src/file_ps.c')
-rw-r--r--src/file_ps.c103
1 files changed, 103 insertions, 0 deletions
diff --git a/src/file_ps.c b/src/file_ps.c
new file mode 100644
index 0000000..6f2bf6c
--- /dev/null
+++ b/src/file_ps.c
@@ -0,0 +1,103 @@
+/*
+
+ File: file_ps.c
+
+ Copyright (C) 2005,2007 Christophe GRENIER <grenier@cgsecurity.org>
+
+ This software 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 the Free Software Foundation, Inc., 51
+ Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+#include <stdio.h>
+#include "types.h"
+#include "filegen.h"
+#include "common.h"
+
+
+static void register_header_check_ps(file_stat_t *file_stat);
+static int header_check_ps(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);
+static int data_check_ps(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery);
+
+const file_hint_t file_hint_ps= {
+ .extension="ps",
+ .description="PostScript or Encapsulated PostScript document",
+ .min_header_distance=0,
+ .max_filesize=PHOTOREC_MAX_FILE_SIZE,
+ .recover=1,
+ .header_check=&header_check_ps,
+ .register_header_check=&register_header_check_ps
+};
+
+static const unsigned char ps_header[11]= { '%','!','P','S','-','A','d','o','b','e','-'};
+
+static void register_header_check_ps(file_stat_t *file_stat)
+{
+ register_header_check(0, ps_header,sizeof(ps_header), &header_check_ps, file_stat);
+}
+
+static int header_check_ps(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)
+{
+ if(memcmp(buffer,ps_header,sizeof(ps_header))==0)
+ { /* PS or EPSF */
+ int i;
+ for(i=sizeof(ps_header);i<20;i++)
+ {
+ switch(buffer[i])
+ {
+ case '\n':
+ reset_file_recovery(file_recovery_new);
+ file_recovery_new->extension=file_hint_ps.extension;
+ file_recovery_new->data_check=&data_check_ps;
+ file_recovery_new->file_check=&file_check_size;
+ return 1;
+ case 'E':
+ if(memcmp(&buffer[i],"EPSF-",5)==0)
+ {
+ reset_file_recovery(file_recovery_new);
+ file_recovery_new->extension="eps";
+ return 1;
+ }
+ break;
+ }
+ }
+ reset_file_recovery(file_recovery_new);
+ file_recovery_new->extension=file_hint_ps.extension;
+ file_recovery_new->data_check=&data_check_ps;
+ file_recovery_new->file_check=&file_check_size;
+ return 1;
+ }
+ return 0;
+}
+
+static int data_check_ps(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery)
+{
+ unsigned int i;
+ for(i=(buffer_size/2)-4;i+4<buffer_size;i++)
+ {
+ if(buffer[i]=='%' && buffer[i+1]=='%' && buffer[i+2]=='E' && buffer[i+3]=='O' && buffer[i+4]=='F')
+ {
+ file_recovery->calculated_file_size=file_recovery->file_size+i+5-(buffer_size/2);
+ return 2;
+ }
+ }
+ file_recovery->calculated_file_size=file_recovery->file_size+(buffer_size/2);
+ return 1;
+}