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PhotoRec: try to detect .wim size

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This commit is contained in:
Christophe Grenier 2014-08-09 09:46:49 +02:00
parent cbdb1af017
commit 8cfbf6b958
1 changed files with 57 additions and 0 deletions
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57
src/file_wim.c
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@ -29,8 +29,11 @@
#include <stdio.h>
#include "types.h"
#include "filegen.h"
#include "common.h"
#include "log.h"
static void register_header_check_wim(file_stat_t *file_stat);
/* http://go.microsoft.com/fwlink/?LinkId=92227 */
const file_hint_t file_hint_wim= {
.extension="wim",
@ -42,10 +45,64 @@ const file_hint_t file_hint_wim= {
.register_header_check=&register_header_check_wim
};
struct reshdr_disk_short
{
union {
uint64_t flags; /* one byte is a combination of RESHDR_FLAG_XXX */
uint64_t size; /* the 7 low-bytes are used to store the size */
};
uint64_t offset;
uint64_t original_size;
} __attribute__ ((__packed__));
#define RESHDR_GET_SIZE(R) (le64(R.size) & 0x00FFFFFFFFFFFFFF)
struct _WIMHEADER_V1_PACKED
{
char ImageTag[8];
uint32_t cbSize;
uint32_t dwVersion;
uint32_t dwFlags;
uint32_t dwCompressionSize;
unsigned char gWIMGuid[16];
uint16_t usPartNumber;
uint16_t usTotalParts;
uint32_t dwImageCount;
struct reshdr_disk_short rhOffsetTable;
struct reshdr_disk_short rhXmlData;
struct reshdr_disk_short rhBootMetadata;
uint32_t dwBootIndex;
struct reshdr_disk_short rhIntegrity;
unsigned char bUnused[60];
} __attribute__ ((__packed__));
static int header_check_wim(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 _WIMHEADER_V1_PACKED *hdr=(const struct _WIMHEADER_V1_PACKED *)buffer;
uint64_t size=le32(hdr->cbSize);
if(le32(hdr->cbSize) < sizeof(struct _WIMHEADER_V1_PACKED))
return 0;
#ifdef DEBUG_WIM
log_info("cbSize %llu\n", (unsigned long long)le32(hdr->cbSize));
log_info("dwCompressionSize %llu\n", (unsigned long long)le32(hdr->dwCompressionSize));
log_info("rhOffsetTable %llu %llu\n", (unsigned long long)RESHDR_GET_SIZE(hdr->rhOffsetTable), (unsigned long long)le64(hdr->rhOffsetTable.offset));
log_info("rhXmlData %llu %llu\n", (unsigned long long)RESHDR_GET_SIZE(hdr->rhXmlData), (unsigned long long)le64(hdr->rhXmlData.offset));
log_info("rhBootMetadata %llu %llu\n", (unsigned long long)RESHDR_GET_SIZE(hdr->rhBootMetadata), (unsigned long long)le64(hdr->rhBootMetadata.offset));
log_info("rhIntegrity %llu %llu\n", (unsigned long long)RESHDR_GET_SIZE(hdr->rhIntegrity), (unsigned long long)le64(hdr->rhIntegrity.offset));
#endif
if(RESHDR_GET_SIZE(hdr->rhOffsetTable) > 0 && RESHDR_GET_SIZE(hdr->rhOffsetTable) + le64(hdr->rhOffsetTable.offset) > size)
size=RESHDR_GET_SIZE(hdr->rhOffsetTable) + le64(hdr->rhOffsetTable.offset);
if(RESHDR_GET_SIZE(hdr->rhXmlData) > 0 && RESHDR_GET_SIZE(hdr->rhXmlData) + le64(hdr->rhXmlData.offset) > size)
size=RESHDR_GET_SIZE(hdr->rhXmlData) + le64(hdr->rhXmlData.offset);
if(RESHDR_GET_SIZE(hdr->rhBootMetadata) > 0 && RESHDR_GET_SIZE(hdr->rhBootMetadata) + le64(hdr->rhBootMetadata.offset) > size)
size=RESHDR_GET_SIZE(hdr->rhBootMetadata) + le64(hdr->rhBootMetadata.offset);
if(RESHDR_GET_SIZE(hdr->rhIntegrity) > 0 && RESHDR_GET_SIZE(hdr->rhIntegrity) + le64(hdr->rhIntegrity.offset) > size)
size=RESHDR_GET_SIZE(hdr->rhIntegrity) + le64(hdr->rhIntegrity.offset);
reset_file_recovery(file_recovery_new);
file_recovery_new->extension=file_hint_wim.extension;
file_recovery_new->calculated_file_size=size;
file_recovery_new->data_check=&data_check_size;
file_recovery_new->file_check=&file_check_size;
return 1;
}