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authorChristophe Grenier <grenier@cgsecurity.org>2016-02-21 10:36:33 +0100
committerChristophe Grenier <grenier@cgsecurity.org>2016-02-21 10:36:33 +0100
commitd2bbd477d88c5a58fcd2071ccb47b27fdf07618e (patch)
tree2fe6451c4399d85b1a09e784b6f9eefdcca43645 /src/file_che.c
parent0df900e32ca82fb9f2153fd3bddd4822b6e3cd34 (diff)
PhotoRec: recover Compucon EOS Design .che File
Diffstat (limited to 'src/file_che.c')
-rw-r--r--src/file_che.c99
1 files changed, 99 insertions, 0 deletions
diff --git a/src/file_che.c b/src/file_che.c
new file mode 100644
index 0000000..17a2641
--- /dev/null
+++ b/src/file_che.c
@@ -0,0 +1,99 @@
+/*
+
+ File: file_che.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 "common.h"
+#include "log.h"
+
+static void register_header_check_che(file_stat_t *file_stat);
+
+const file_hint_t file_hint_che= {
+ .extension="che",
+ .description="Compucon EOS Design File",
+ .max_filesize=100*1024*1024,
+ .recover=1,
+ .enable_by_default=1,
+ .register_header_check=&register_header_check_che
+};
+
+struct che_block
+{
+ char name[0x10];
+ uint32_t size;
+ uint32_t unk1;
+ uint32_t unk2;
+} __attribute__ ((gcc_struct, __packed__));
+
+
+static void file_check_che(file_recovery_t *file_recovery)
+{
+ struct che_block block;
+ uint64_t offset;
+ uint64_t new_offset=0x19;
+ const uint64_t file_size_org=file_recovery->file_size;
+ file_recovery->file_size=0;
+ do
+ {
+ offset=new_offset;
+#ifdef DEBUG_CHE
+ log_info("offset=0x%llx\n", (long long unsigned)offset);
+#endif
+ if(my_fseek(file_recovery->handle, offset, SEEK_SET) < 0 ||
+ fread(&block, sizeof(struct che_block), 1, file_recovery->handle) != 1)
+ {
+ file_recovery->file_size=offset;
+ return ;
+ }
+#ifdef DEBUG_CHE
+ log_info(" sizeof=0x%x, size=%x, name=%s\n", sizeof(struct che_block),le32(block.size), block.name);
+#endif
+ new_offset=offset+sizeof(struct che_block)+le32(block.size);
+ if(memcmp(block.name,"ConnectionInfo",14)==0)
+ {
+ file_recovery->file_size=new_offset;
+ return ;
+ }
+ } while(new_offset <= file_size_org && le32(block.size)!=0);
+ file_recovery->file_size=offset;
+}
+
+static int header_check_che(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_che.extension;
+ file_recovery_new->min_filesize=0x19;
+ file_recovery_new->file_check=&file_check_che;
+ return 1;
+}
+
+static void register_header_check_che(file_stat_t *file_stat)
+{
+ register_header_check(0, "Compucon EOS Design File", 24, &header_check_che, file_stat);
+}