summaryrefslogtreecommitdiffstats
path: root/src/file_ico.c
diff options
context:
space:
mode:
authorChristophe Grenier <grenier@cgsecurity.org>2009-01-18 16:27:34 +0100
committerChristophe Grenier <grenier@cgsecurity.org>2009-01-18 16:27:34 +0100
commit5d64598673b0f26a39009934c909826623c51518 (patch)
tree97b538b2cd2bb271b60a8bb807513fd1fd31f49b /src/file_ico.c
parente91fc1e8a7fffb826aaf5ec3c5df39429668a4dd (diff)
PhotoRec: recover Windows ico icons
Diffstat (limited to 'src/file_ico.c')
-rw-r--r--src/file_ico.c101
1 files changed, 101 insertions, 0 deletions
diff --git a/src/file_ico.c b/src/file_ico.c
new file mode 100644
index 0000000..6baaaa8
--- /dev/null
+++ b/src/file_ico.c
@@ -0,0 +1,101 @@
+/*
+
+ File: file_ico.c
+
+ Copyright (C) 2009 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_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+#ifdef HAVE_TIME_H
+#include <time.h>
+#endif
+#include <stdio.h>
+#include "types.h"
+#include "common.h"
+#include "filegen.h"
+#include "log.h"
+
+static void register_header_check_ico(file_stat_t *file_stat);
+static int header_check_ico(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 file_hint_t file_hint_ico= {
+ .extension="ico",
+ .description="Windows Icone",
+ .min_header_distance=0,
+ .max_filesize=PHOTOREC_MAX_FILE_SIZE,
+ .recover=1,
+ .enable_by_default=1,
+ .register_header_check=&register_header_check_ico
+};
+
+static const unsigned char header_ico[6]= {0x00 , 0x00, 0x01, 0x00, 0x01, 0x00};
+
+static void register_header_check_ico(file_stat_t *file_stat)
+{
+ register_header_check(0, header_ico, sizeof(header_ico), &header_check_ico, file_stat);
+}
+
+/*
+ * http://en.wikipedia.org/wiki/ICO_(icon_image_file_format)
+ */
+
+struct ico_header
+{
+ uint16_t reserved;
+ uint16_t type;
+ uint16_t count;
+} __attribute__ ((__packed__));
+
+struct ico_directory
+{
+ uint8_t width;
+ uint8_t heigth;
+ uint8_t color_count;
+ uint8_t reserved;
+ uint16_t color_planes;
+ uint16_t bits_per_pixel;
+ uint32_t bitmap_size;
+ uint32_t bitmap_offset;
+} __attribute__ ((__packed__));
+
+static int header_check_ico(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 ico_header *ico=(const struct ico_header*)buffer;
+ const struct ico_directory *ico_dir=(const struct ico_directory*)(ico+1);
+ /* Recover icon with a single image */
+ if(le16(ico->reserved)==0 && le16(ico->type)==1 && le16(ico->count)==1 &&
+ (ico_dir->reserved==0 || ico_dir->reserved==255) &&
+ (ico_dir->color_planes==0 || ico_dir->color_planes==1)
+ )
+ {
+ reset_file_recovery(file_recovery_new);
+ file_recovery_new->extension=file_hint_ico.extension;
+ file_recovery_new->calculated_file_size=le32(ico_dir->bitmap_size) + le32(ico_dir->bitmap_offset);
+ file_recovery_new->data_check=&data_check_size;
+ file_recovery_new->file_check=&file_check_size;
+ }
+ return 1;
+}