From c6ad9068b3a0f8092927678ada9f2012900ad2a2 Mon Sep 17 00:00:00 2001
From: Christophe Grenier <grenier@cgsecurity.org>
Date: Sun, 21 Feb 2016 10:39:08 +0100
Subject: PhotoRec: recover Symantec encrypted xml files

---
 src/file_xml.c | 113 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 113 insertions(+)
 create mode 100644 src/file_xml.c

(limited to 'src/file_xml.c')

diff --git a/src/file_xml.c b/src/file_xml.c
new file mode 100644
index 00000000..62fd28ff
--- /dev/null
+++ b/src/file_xml.c
@@ -0,0 +1,113 @@
+/*
+
+    File: file_xml.c
+
+    Copyright (C) 2016 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 "log.h"
+
+static void register_header_check_xml(file_stat_t *file_stat);
+
+const file_hint_t file_hint_xml= {
+  .extension="xml",
+  .description="Symantec encrypted xml files",
+  .max_filesize=PHOTOREC_MAX_FILE_SIZE,
+  .recover=1,
+  .enable_by_default=1,
+  .register_header_check=&register_header_check_xml
+};
+
+static void file_rename_xml(file_recovery_t *file_recovery)
+{
+  static const char fn[]="<\0f\0i\0l\0e\0n\0a\0m\0e\0>\0";
+  FILE *file;
+  char buffer[4096];
+  size_t lu;
+  unsigned int i;
+  if((file=fopen(file_recovery->filename, "rb"))==NULL)
+    return;
+  if((lu=fread(&buffer, 1, sizeof(buffer)-1, file)) <= 0)
+  {
+    fclose(file);
+    return ;
+  }
+  fclose(file);
+  buffer[lu]='\0';
+  buffer[lu+1]='\0';
+  buffer[4096-21]='\0';
+  buffer[4096-20]='\0';
+  for(i=0; i+20<lu && !(buffer[i]==0 && buffer[i+1]==0); i+=2)
+  {
+    if(memcmp(&buffer[i], fn, 20)==0)
+    {
+      const char *title=&buffer[i+20];
+      int j;
+      for(j=0;
+	  i+20+j+1<lu && !(title[j]==0 && title[j+1]==0) && !(title[j]=='<' && title[j+1]==0);
+	  j+=2)
+      {
+      }
+      file_rename_unicode(file_recovery, title, j, 0, NULL, 1);
+      return ;
+    }
+  }
+}
+
+static int header_check_xml(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)
+{
+  reset_file_recovery(file_recovery_new);
+  file_recovery_new->extension=file_hint_xml.extension;
+  file_recovery_new->min_filesize=512;
+  file_recovery_new->file_rename=&file_rename_xml;
+  return 1;
+}
+
+static void register_header_check_xml(file_stat_t *file_stat)
+{
+  static const unsigned char xml_header[142]=  {
+    0x3c, 0x00, 0x3f, 0x00, 'x' , 0x00, 'm' , 0x00,
+    'l' , 0x00, ' ' , 0x00, 'v' , 0x00, 'e' , 0x00,
+    'r' , 0x00, 's' , 0x00, 'i' , 0x00, 'o' , 0x00,
+    'n' , 0x00, 0x3d, 0x00, 0x22, 0x00, '1' , 0x00,
+    '.' , 0x00, '0' , 0x00, 0x22, 0x00, ' ' , 0x00,
+    'e' , 0x00, 'n' , 0x00, 'c' , 0x00, 'o' , 0x00,
+    'd' , 0x00, 'i' , 0x00, 'n' , 0x00, 'g' , 0x00,
+    0x3d, 0x00, 0x22, 0x00, 'U' , 0x00, 'T' , 0x00,
+    'F' , 0x00, 0x2d, 0x00, '1' , 0x00, '6' , 0x00,
+    0x22, 0x00, 0x3f, 0x00, 0x3e, 0x00, 0x3c, 0x00,
+    0x21, 0x00, 0x2d, 0x00, 0x2d, 0x00, 'G' , 0x00,
+    'E' , 0x00, 'T' , 0x00, 'R' , 0x00, 'S' , 0x00,
+    'F' , 0x00, 'i' , 0x00, 'l' , 0x00, 'e' , 0x00,
+    'H' , 0x00, 'e' , 0x00, 'a' , 0x00, 'd' , 0x00,
+    'e' , 0x00, 'r' , 0x00, 'S' , 0x00, 'i' , 0x00,
+    'z' , 0x00, 'e' , 0x00, 0x3d, 0x00, '0' , 0x00,
+    'x' , 0x00, '0' , 0x00, '0' , 0x00, '0' , 0x00,
+    '0' , 0x00, '0' , 0x00, '8' , 0x00
+  };
+  register_header_check(0, xml_header, sizeof(xml_header), &header_check_xml, file_stat);
+}
-- 
cgit