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/*
* Unix SMB/CIFS implementation.
* Windows NT registry I/O library
* Copyright (c) Gerald (Jerry) Carter 2005
*
* This program 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 3 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, see <http://www.gnu.org/licenses/>.
*/
/************************************************************
* Most of this information was obtained from
* http://www.wednesday.demon.co.uk/dosreg.html
* Thanks Nigel!
***********************************************************/
#include "registry/reg_parse_prs.h"
#include "registry/reg_objects.h"
#ifndef _REGFIO_H
#define _REGFIO_H
struct regsubkey_ctr;
/* Macros */
#define REGF_BLOCKSIZE 0x1000
#define REGF_ALLOC_BLOCK 0x1000
/* header sizes for various records */
#define REGF_HDR_SIZE 4
#define HBIN_HDR_SIZE 4
#define HBIN_HEADER_REC_SIZE 0x24
#define REC_HDR_SIZE 2
#define REGF_OFFSET_NONE 0xffffffff
/* Flags for the vk records */
#define VK_FLAG_NAME_PRESENT 0x0001
#define VK_DATA_IN_OFFSET 0x80000000
/* NK record macros */
#define NK_TYPE_LINKKEY 0x0010
#define NK_TYPE_NORMALKEY 0x0020
#define NK_TYPE_ROOTKEY 0x002c
#define HBIN_STORE_REF(x, y) { x->hbin = y; y->ref_count++ };
#define HBIN_REMOVE_REF(x, y) { x->hbin = NULL; y->ref_count-- /* if the count == 0; we can clean up */ };
/* HBIN block */
struct regf_hbin;
typedef struct regf_hbin {
struct regf_hbin *prev, *next;
uint32_t file_off; /* my offset in the registry file */
uint32_t free_off; /* offset to free space within the hbin record */
uint32_t free_size; /* amount of data left in the block */
int ref_count; /* how many active records are pointing to this block (not used currently) */
char header[HBIN_HDR_SIZE]; /* "hbin" */
uint32_t first_hbin_off; /* offset from first hbin block */
uint32_t block_size; /* block size of this blockually a multiple of 4096Kb) */
prs_struct ps; /* data */
bool dirty; /* has this hbin block been modified? */
} REGF_HBIN;
/* ??? List -- list of key offsets and hashed names for consistency */
typedef struct {
uint32_t nk_off;
uint8_t keycheck[sizeof(uint32_t)];
char *fullname;
} REGF_HASH_REC;
typedef struct {
REGF_HBIN *hbin; /* pointer to HBIN record (in memory) containing this nk record */
uint32_t hbin_off; /* offset from beginning of this hbin block */
uint32_t rec_size; /* ((start_offset - end_offset) & 0xfffffff8) */
char header[REC_HDR_SIZE];
uint16_t num_keys;
REGF_HASH_REC *hashes;
} REGF_LF_REC;
/* Key Value */
typedef struct {
REGF_HBIN *hbin; /* pointer to HBIN record (in memory) containing this nk record */
uint32_t hbin_off; /* offset from beginning of this hbin block */
uint32_t rec_size; /* ((start_offset - end_offset) & 0xfffffff8) */
uint32_t rec_off; /* offset stored in the value list */
char header[REC_HDR_SIZE];
char *valuename;
uint32_t data_size;
uint32_t data_off;
uint8_t *data;
uint32_t type;
uint16_t flag;
} REGF_VK_REC;
/* Key Security */
struct _regf_sk_rec;
typedef struct _regf_sk_rec {
struct _regf_sk_rec *next, *prev;
REGF_HBIN *hbin; /* pointer to HBIN record (in memory) containing this nk record */
uint32_t hbin_off; /* offset from beginning of this hbin block */
uint32_t rec_size; /* ((start_offset - end_offset) & 0xfffffff8) */
uint32_t sk_off; /* offset parsed from NK record used as a key
to lookup reference to this SK record */
char header[REC_HDR_SIZE];
uint32_t prev_sk_off;
uint32_t next_sk_off;
uint32_t ref_count;
uint32_t size;
struct security_descriptor *sec_desc;
} REGF_SK_REC;
/* Key Name */
typedef struct {
REGF_HBIN *hbin; /* pointer to HBIN record (in memory) containing this nk record */
uint32_t hbin_off; /* offset from beginning of this hbin block */
uint32_t subkey_index; /* index to next subkey record to return */
uint32_t rec_size; /* ((start_offset - end_offset) & 0xfffffff8) */
/* header information */
char header[REC_HDR_SIZE];
uint16_t key_type;
NTTIME mtime;
uint32_t parent_off; /* back pointer in registry hive */
uint32_t classname_off;
char *classname;
char *keyname;
/* max lengths */
uint32_t max_bytes_subkeyname; /* max subkey name * 2 */
uint32_t max_bytes_subkeyclassname; /* max subkey classname length (as if) */
uint32_t max_bytes_valuename; /* max valuename * 2 */
uint32_t max_bytes_value; /* max value data size */
/* unknowns */
uint32_t unk_index; /* nigel says run time index ? */
/* children */
uint32_t num_subkeys;
uint32_t subkeys_off; /* hash records that point to NK records */
uint32_t num_values;
uint32_t values_off; /* value lists which point to VK records */
uint32_t sk_off; /* offset to SK record */
/* link in the other records here */
REGF_LF_REC subkeys;
REGF_VK_REC *values;
REGF_SK_REC *sec_desc;
} REGF_NK_REC;
/* REGF block */
typedef struct {
/* run time information */
int fd; /* file descriptor */
int open_flags; /* flags passed to the open() call */
TALLOC_CTX *mem_ctx; /* memory context for run-time file access information */
REGF_HBIN *block_list; /* list of open hbin blocks */
/* file format information */
char header[REGF_HDR_SIZE]; /* "regf" */
uint32_t data_offset; /* offset to record in the first (or any?) hbin block */
uint32_t last_block; /* offset to last hbin block in file */
uint32_t checksum; /* XOR of bytes 0x0000 - 0x01FB */
NTTIME mtime;
REGF_SK_REC *sec_desc_list; /* list of security descriptors referenced by NK records */
/* Ignore checksums in input data. Used by fuzzing code to allow more
* coverage without having to calcuate a valid checksum. The checksums
* are merely to detect data corruption and don't provide a security
* value.
*/
bool ignore_checksums;
/* unknowns used to simply writing */
uint32_t unknown1;
uint32_t unknown2;
uint32_t unknown3;
uint32_t unknown4;
uint32_t unknown5;
uint32_t unknown6;
} REGF_FILE;
/* Function Declarations */
REGF_FILE* regfio_open( const char *filename, int flags, int mode );
int regfio_close( REGF_FILE *r );
REGF_NK_REC* regfio_rootkey( REGF_FILE *file );
REGF_NK_REC* regfio_fetch_subkey( REGF_FILE *file, REGF_NK_REC *nk );
REGF_NK_REC* regfio_write_key ( REGF_FILE *file, const char *name,
struct regval_ctr *values, struct regsubkey_ctr *subkeys,
struct security_descriptor *sec_desc, REGF_NK_REC *parent );
#endif /* _REGFIO_H */
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