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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_crw.c
First version in git
Diffstat (limited to 'src/file_crw.c')
-rw-r--r--src/file_crw.c86
1 files changed, 86 insertions, 0 deletions
diff --git a/src/file_crw.c b/src/file_crw.c
new file mode 100644
index 0000000..6de8f9a
--- /dev/null
+++ b/src/file_crw.c
@@ -0,0 +1,86 @@
+/*
+
+ File: file_crw.c
+
+ Copyright (C) 1998-2005,2007 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 "log.h"
+
+static void register_header_check_crw(file_stat_t *file_stat);
+static int header_check_crw(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_crw(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery);
+
+const file_hint_t file_hint_crw= {
+ .extension="crw",
+ .description="Canon Raw picture",
+ .min_header_distance=0,
+ .max_filesize=PHOTOREC_MAX_FILE_SIZE,
+ .recover=1,
+ .header_check=&header_check_crw,
+ .register_header_check=&register_header_check_crw
+};
+
+static const unsigned char crw_header_be[2]= {'I','I'};
+static const unsigned char crw_header_le[2]= {'M','M'};
+
+static void register_header_check_crw(file_stat_t *file_stat)
+{
+ register_header_check(0, crw_header_be, sizeof(crw_header_be), &header_check_crw, file_stat);
+ register_header_check(0, crw_header_le, sizeof(crw_header_le), &header_check_crw, file_stat);
+}
+
+static int header_check_crw(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(((buffer[0]==0x49 && buffer[1]==0x49)||(buffer[0]==0x4D && buffer[1]==0x4D))
+ && memcmp(buffer+6,"HEAPCCDR",8)==0)
+ {
+ reset_file_recovery(file_recovery_new);
+ file_recovery_new->extension=file_hint_crw.extension;
+ file_recovery_new->data_check=&data_check_crw;
+ file_recovery_new->file_check=&file_check_size;
+ return 1;
+ }
+ return 0;
+}
+
+static int data_check_crw(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery)
+{
+ unsigned int i;
+ for(i=(buffer_size/2)-13;i+13<buffer_size;i++)
+ {
+ if(buffer[i]==0x0A && buffer[i+1]==0x30 && buffer[i+2]==0xFE && buffer[i+3]==0x17 && buffer[i+13]==0)
+ {
+ file_recovery->calculated_file_size=file_recovery->file_size+i+14-(buffer_size/2);
+ log_debug("EOF CRW found\n");
+ return 2;
+ }
+ }
+ file_recovery->calculated_file_size=file_recovery->file_size+(buffer_size/2);
+ return 1;
+}
+