#include <limits.h>
+#include "wimlib/guid.h"
#include "wimlib/resource.h"
#include "wimlib/types.h"
-/* Length of "Globally Unique ID" field in WIM header. */
-#define WIM_GUID_LEN 16
-
/* Length of the WIM header on disk. wimlib currently requires that the header
* be exactly this size. */
#define WIM_HEADER_DISK_SIZE 208
/* +0x08: Size of the WIM header, in bytes; WIM_HEADER_DISK_SIZE
* expected (currently the only supported value). */
- u32 hdr_size;
+ le32 hdr_size;
/* +0x0c: Version of the WIM file. Recognized values are the
* WIM_VERSION_* constants from above. */
- u32 wim_version;
+ le32 wim_version;
/* +0x10: Flags for the WIM file (WIM_HDR_FLAG_*). */
- u32 wim_flags;
+ le32 wim_flags;
/* +0x14: Uncompressed chunk size for non-solid compressed resources in
- * the WIM or 0 if the WIM is uncompressed. (However wimlib will accept
- * any value here if the WIM is uncompressed.) */
- u32 chunk_size;
+ * the WIM or 0 if the WIM is uncompressed. */
+ le32 chunk_size;
/* +0x18: Globally unique identifier for the WIM file. Basically a
* bunch of random bytes. */
- u8 guid[WIM_GUID_LEN];
+ u8 guid[GUID_SIZE];
/* +0x28: Number of this WIM part in the split WIM file, indexed from 1,
* or 1 if the WIM is not split. */
- u16 part_number;
+ le16 part_number;
/* +0x2a: Total number of parts of the split WIM file, or 1 if the WIM
* is not split. */
- u16 total_parts;
+ le16 total_parts;
/* +0x2c: Number of images in the WIM. WIMGAPI requires that this be at
* least 1. wimlib allows 0. */
- u32 image_count;
+ le32 image_count;
/* +0x30: Location and size of the WIM's blob table. */
struct wim_reshdr_disk blob_table_reshdr;
/* +0x78: 1-based index of the bootable image of the WIM, or 0 if no
* image is bootable. */
- u32 boot_idx;
+ le32 boot_idx;
/* +0x7c: Location and size of the WIM's integrity table, or all zeroes
* if the WIM has no integrity table.
/* +0xd0 (208) */
} _packed_attribute;
-#define MAX_IMAGES (((INT_MAX < INT32_MAX) ? INT_MAX : INT32_MAX) - 1)
+/*
+ * Arbitrarily limit the maximum number of images to 65535, to prevent huge
+ * memory allocations when processing fuzzed files. This can be increased if
+ * ever needed (up to INT_MAX - 1).
+ */
+#define MAX_IMAGES 65535
/* In-memory representation of a WIM header. See `struct wim_header_disk' for
* field descriptions. */
u32 wim_version;
u32 flags;
u32 chunk_size;
- u8 guid[WIM_GUID_LEN];
+ u8 guid[GUID_SIZE];
u16 part_number;
u16 total_parts;
u32 image_count;