PhotoRec: recover InnoDB .ibd database file

src/Makefile.am

@@ -152,6 +152,7 @@ file_C			= filegen.c \
 			  file_hfsp.c \
 			  file_hr9.c \
 			  file_http.c \
+			  file_ibd.c \
 			  file_icc.c \
 			  file_icns.c \
 			  file_ico.c \

src/file_ibd.c

@@ -0,0 +1,106 @@
+/*
+
+    File: file_ibd.c
+
+    Copyright (C) 2015 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_ibd(file_stat_t *file_stat);
+
+const file_hint_t file_hint_ibd= {
+  .extension="ibd",
+  .description="InnoDB database file",
+  .max_filesize=PHOTOREC_MAX_FILE_SIZE,
+  .recover=1,
+  .enable_by_default=1,
+  .register_header_check=&register_header_check_ibd
+};
+
+#define FSP_HEADER_OFFSET       38
+#define FSP_SPACE_FLAGS         16      /* fsp_space_t.flags, similar to dict_table_t::flags */
+#define FIL_PAGE_TYPE_FSP_HDR	8	/* File space header */
+#define DICT_TF_BITS            6       /* number of flag bits */
+#define DICT_TF_FORMAT_SHIFT    5       /* file format */
+#define DICT_TF_FORMAT_MASK     \
+  ((~(~0 << (DICT_TF_BITS - DICT_TF_FORMAT_SHIFT))) << DICT_TF_FORMAT_SHIFT)
+
+#define DICT_TF_FORMAT_ZIP      1       /* InnoDB plugin for 5.1: compressed tables */
+
+struct innodb_fil_header
+{
+  uint32_t space_or_chksum;
+  uint32_t offset;
+  uint32_t prev;
+  uint32_t next;
+  uint64_t lsn;
+  uint16_t type;
+  uint64_t file_flush_lsn;
+  uint32_t arch_log_no_or_space_id;
+} __attribute__ ((gcc_struct, __packed__));
+
+static int header_check_ibd(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 innodb_fil_header *hdr=(const struct innodb_fil_header *)buffer;
+  const uint32_t *flags_ptr=(const uint32_t *)&buffer[FSP_HEADER_OFFSET + FSP_SPACE_FLAGS];
+  const uint32_t flags=be32(*flags_ptr);
+  if(be16(hdr->type)==0)
+  {
+    /* Antelope (pre-5.1.7) */
+    if(flags==0)
+      return 0;
+  }
+  else if(be16(hdr->type)==FIL_PAGE_TYPE_FSP_HDR)
+  {
+    const unsigned int format = flags & DICT_TF_FORMAT_MASK >> DICT_TF_FORMAT_SHIFT;
+    if(flags==0)
+    {
+      /* Antelope (5.1.7 or newer) */
+    }
+    else if(format==DICT_TF_FORMAT_ZIP)
+    {
+      /* Barracuda */
+    }
+    else
+      return 0;
+  }
+  else
+    return 0;
+  if(buffer_size >= 0xc078 && memcmp(&buffer[0xc070], "supremum", 8)!=0)
+    return 0;
+  reset_file_recovery(file_recovery_new);
+  file_recovery_new->extension=file_hint_ibd.extension;
+  file_recovery_new->min_filesize=0xc078;
+  return 1;
+}
+
+static void register_header_check_ibd(file_stat_t *file_stat)
+{
+  register_header_check(0xc063, "infimum", 7, &header_check_ibd, file_stat);
+}

src/file_list.c

@@ -154,6 +154,7 @@ extern const file_hint_t file_hint_hds;
 extern const file_hint_t file_hint_hfsp;
 extern const file_hint_t file_hint_hr9;
 extern const file_hint_t file_hint_http;
+extern const file_hint_t file_hint_ibd;
 extern const file_hint_t file_hint_icc;
 extern const file_hint_t file_hint_icns;
 extern const file_hint_t file_hint_ico;
@@ -454,6 +455,7 @@ file_enable_t list_file_enable[]=
   { .enable=0, .file_hint=&file_hint_hfsp },
   { .enable=0, .file_hint=&file_hint_hr9  },
   { .enable=0, .file_hint=&file_hint_http },
+  { .enable=0, .file_hint=&file_hint_ibd  },
   { .enable=0, .file_hint=&file_hint_icc  },
   { .enable=0, .file_hint=&file_hint_icns  },
   { .enable=0, .file_hint=&file_hint_ico  },