PhotoRec: recover FX Preset .fxp files

src/Makefile.am

@@ -180,6 +180,7 @@ file_C			= filegen.c \
 			  file_frm.c \
 			  file_fs.c \
 			  file_fwd.c \
+			  file_fxp.c \
 			  file_gam.c \
 			  file_gct.c \
 			  file_gho.c \

src/file_fxp.c

@@ -0,0 +1,84 @@
+/*
+
+    File: file_fxp.c
+
+    Copyright (C) 2022 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.
+
+ */
+
+#if !defined(SINGLE_FORMAT) || defined(SINGLE_FORMAT_fxp)
+#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"
+
+/*@ requires valid_register_header_check(file_stat); */
+static void register_header_check_fxp(file_stat_t *file_stat);
+
+const file_hint_t file_hint_fxp= {
+  .extension="fxp",
+  .description="FX Preset files",
+  .max_filesize=PHOTOREC_MAX_FILE_SIZE,
+  .recover=1,
+  .enable_by_default=1,
+  .register_header_check=&register_header_check_fxp
+};
+
+struct fxp_header
+{
+  char magic[4];
+  uint32_t size;
+  char fxmagic[4];
+  uint32_t version;
+  char fxid[4];
+  uint32_t fxversion;
+  uint32_t numPrograms;
+  char name[28];
+  uint32_t chunksize;
+} __attribute__ ((gcc_struct, __packed__));
+
+/*@
+  @ requires valid_header_check_param(buffer, buffer_size, safe_header_only, file_recovery, file_recovery_new);
+  @ ensures  valid_header_check_result(\result, file_recovery_new);
+  @*/
+static int header_check_fxp(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)
+{
+  const struct fxp_header *fxp=(const struct fxp_header *)buffer;
+  if(be32(fxp->size) < sizeof(struct fxp_header))
+    return 0;
+  if(memcmp(&fxp->fxmagic, "FPCh", 4) != 0)
+    return 0;
+  reset_file_recovery(file_recovery_new);
+  file_recovery_new->extension=file_hint_fxp.extension;
+  file_recovery_new->calculated_file_size=(uint64_t)be32(fxp->size);
+  file_recovery_new->data_check=&data_check_size;
+  file_recovery_new->file_check=&file_check_size;
+  return 1;
+}
+
+static void register_header_check_fxp(file_stat_t *file_stat)
+{
+  static const unsigned char fxp_header[4]=  { 'C' , 'c' , 'n' , 'K'   };
+  register_header_check(0, fxp_header, sizeof(fxp_header), &header_check_fxp, file_stat);
+}
+#endif

src/file_list.c

@@ -422,6 +422,7 @@ extern const file_hint_t file_hint_fs;
 extern const file_hint_t file_hint_fwd;
 #endif
 #if !defined(SINGLE_FORMAT) || defined(SINGLE_FORMAT_gam)
+extern const file_hint_t file_hint_fxp;
 extern const file_hint_t file_hint_gam;
 #endif
 #if !defined(SINGLE_FORMAT) || defined(SINGLE_FORMAT_gct)
@@ -1466,6 +1467,7 @@ file_enable_t array_file_enable[]=
   { .enable=0, .file_hint=&file_hint_fwd  },
 #endif
 #if !defined(SINGLE_FORMAT) || defined(SINGLE_FORMAT_gam)
+  { .enable=0, .file_hint=&file_hint_fxp  },
   { .enable=0, .file_hint=&file_hint_gam  },
 #endif
 #if !defined(SINGLE_FORMAT) || defined(SINGLE_FORMAT_gct)