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source: trunk/lib/regfio.c @ 42

Last change on this file since 42 was 41, checked in by tim, 19 years ago

Added full printing of values, as with old code.

renamed type conversion functions to follow precedent.

Property svn:keywords set to Id

File size: 33.8 KB

Rev	Line
[30]	1	/*
	2	* Branched from Samba project Subversion repository, version #7470:
	3	* http://websvn.samba.org/cgi-bin/viewcvs.cgi/trunk/source/registry/regfio.c
	4	*
	5	* Unix SMB/CIFS implementation.
	6	* Windows NT registry I/O library
	7	*
	8	* Copyright (C) 2005 Timothy D. Morgan
	9	* Copyright (C) 2005 Gerald (Jerry) Carter
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License as published by
	13	* the Free Software Foundation; version 2 of the License.
	14	*
	15	* This program is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	* GNU General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public License
	21	* along with this program; if not, write to the Free Software
	22	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	23	*
	24	* $Id: regfio.c 41 2005-08-01 01:13:15Z tim $
	25	*/
	26
	27	#include "../include/regfio.h"
	28
	29
	30
	31	/*******************************************************************
	32	*
	33	* TODO : Right now this code basically ignores classnames.
	34	*
	35	******************************************************************/
	36
[32]	37	/* Registry types mapping */
	38	const VAL_STR reg_type_names[] =
	39	{
	40	{ REG_SZ, "SZ" },
	41	{ REG_EXPAND_SZ, "EXPAND_SZ" },
[41]	42	{ REG_BINARY, "BINARY" },
[32]	43	{ REG_DWORD, "DWORD" },
	44	{ REG_DWORD_BE, "DWORD_BE" },
	45	{ REG_LINK, "LINK" },
	46	{ REG_MULTI_SZ, "MULTI_SZ" },
	47	{ REG_RESOURCE_LIST, "RSRC_LIST" },
	48	{ REG_FULL_RESOURCE_DESCRIPTOR, "RSRC_DESC" },
	49	{ REG_RESOURCE_REQUIREMENTS_LIST,"RSRC_REQ_LIST"},
	50	{ REG_KEY, "KEY" },
	51	{ 0, NULL },
	52	};
[30]	53
[32]	54
	55	/* Returns NULL on error */
[41]	56	const char* regfio_type_val2str(unsigned int val)
[32]	57	{
	58	int i;
	59
	60	for(i=0; reg_type_names[i].val && reg_type_names[i].str; i++)
	61	if (reg_type_names[i].val == val)
	62	return reg_type_names[i].str;
	63
	64	return NULL;
	65	}
	66
	67
	68	/* Returns 0 on error */
[41]	69	int regfio_type_str2val(const char* str)
[32]	70	{
	71	int i;
	72
	73	for(i=0; reg_type_names[i].val && reg_type_names[i].str; i++)
	74	if (strcmp(reg_type_names[i].str, str) == 0)
	75	return reg_type_names[i].val;
	76
	77	return 0;
	78	}
	79
	80
[30]	81	/*******************************************************************
[31]	82	*******************************************************************/
[30]	83	static int read_block( REGF_FILE file, prs_struct ps, uint32 file_offset,
	84	uint32 block_size )
	85	{
[31]	86	int bytes_read, returned;
	87	char *buffer;
	88	SMB_STRUCT_STAT sbuf;
[30]	89
[31]	90	/* check for end of file */
[30]	91
[31]	92	if ( fstat( file->fd, &sbuf ) ) {
	93	/DEBUG(0,("read_block: stat() failed! (%s)\n", strerror(errno)));/
	94	return -1;
	95	}
[30]	96
[31]	97	if ( (size_t)file_offset >= sbuf.st_size )
	98	return -1;
[30]	99
[31]	100	/* if block_size == 0, we are parsnig HBIN records and need
	101	to read some of the header to get the block_size from there */
[30]	102
[31]	103	if ( block_size == 0 ) {
	104	uint8 hdr[0x20];
[30]	105
[31]	106	if ( lseek( file->fd, file_offset, SEEK_SET ) == -1 ) {
	107	/DEBUG(0,("read_block: lseek() failed! (%s)\n", strerror(errno) ));/
	108	return -1;
	109	}
[30]	110
[31]	111	returned = read( file->fd, hdr, 0x20 );
	112	if ( (returned == -1) \|\| (returned < 0x20) ) {
	113	/DEBUG(0,("read_block: failed to read in HBIN header. Is the file corrupt?\n"));/
	114	return -1;
	115	}
[30]	116
[31]	117	/* make sure this is an hbin header */
[30]	118
[31]	119	if ( strncmp( hdr, "hbin", HBIN_HDR_SIZE ) != 0 ) {
	120	/DEBUG(0,("read_block: invalid block header!\n"));/
	121	return -1;
	122	}
[30]	123
[31]	124	block_size = IVAL( hdr, 0x08 );
	125	}
[30]	126
[31]	127	/DEBUG(10,("read_block: block_size == 0x%x\n", block_size ));/
[30]	128
[31]	129	/* set the offset, initialize the buffer, and read the block from disk */
[30]	130
[31]	131	if ( lseek( file->fd, file_offset, SEEK_SET ) == -1 ) {
	132	/DEBUG(0,("read_block: lseek() failed! (%s)\n", strerror(errno) ));/
	133	return -1;
	134	}
[30]	135
[31]	136	prs_init( ps, block_size, file->mem_ctx, UNMARSHALL );
	137	buffer = ps->data_p;
	138	bytes_read = returned = 0;
[30]	139
[32]	140	while ( bytes_read < block_size )
	141	{
	142	if((returned =
	143	read(file->fd, buffer+bytes_read, block_size-bytes_read)) == -1)
	144	{
[31]	145	/DEBUG(0,("read_block: read() failed (%s)\n", strerror(errno) ));/
	146	return false;
	147	}
[32]	148	if ((returned == 0) && (bytes_read < block_size))
	149	{
[31]	150	/DEBUG(0,("read_block: not a vald registry file ?\n" ));/
	151	return false;
	152	}
[32]	153
[31]	154	bytes_read += returned;
	155	}
[30]	156
[31]	157	return bytes_read;
[30]	158	}
	159
	160
	161	/*******************************************************************
[31]	162	*******************************************************************/
[30]	163	static bool prs_regf_block( const char desc, prs_struct ps, int depth, REGF_FILE *file )
	164	{
[31]	165	depth++;
[30]	166
[31]	167	if ( !prs_uint8s( true, "header", ps, depth, file->header, sizeof( file->header )) )
	168	return false;
[30]	169
[31]	170	/* yes, these values are always identical so store them only once */
[30]	171
[31]	172	if ( !prs_uint32( "unknown1", ps, depth, &file->unknown1 ))
	173	return false;
	174	if ( !prs_uint32( "unknown1 (again)", ps, depth, &file->unknown1 ))
	175	return false;
[30]	176
[31]	177	/* get the modtime */
[30]	178
[31]	179	if ( !prs_set_offset( ps, 0x0c ) )
	180	return false;
	181	if ( !smb_io_time( "modtime", &file->mtime, ps, depth ) )
	182	return false;
[30]	183
[31]	184	/* constants */
[30]	185
[31]	186	if ( !prs_uint32( "unknown2", ps, depth, &file->unknown2 ))
	187	return false;
	188	if ( !prs_uint32( "unknown3", ps, depth, &file->unknown3 ))
	189	return false;
	190	if ( !prs_uint32( "unknown4", ps, depth, &file->unknown4 ))
	191	return false;
	192	if ( !prs_uint32( "unknown5", ps, depth, &file->unknown5 ))
	193	return false;
[30]	194
[31]	195	/* get file offsets */
[30]	196
[31]	197	if ( !prs_set_offset( ps, 0x24 ) )
	198	return false;
	199	if ( !prs_uint32( "data_offset", ps, depth, &file->data_offset ))
	200	return false;
	201	if ( !prs_uint32( "last_block", ps, depth, &file->last_block ))
	202	return false;
[30]	203
[31]	204	/* one more constant */
[30]	205
[31]	206	if ( !prs_uint32( "unknown6", ps, depth, &file->unknown6 ))
	207	return false;
[30]	208
[31]	209	/* get the checksum */
[30]	210
[31]	211	if ( !prs_set_offset( ps, 0x01fc ) )
	212	return false;
	213	if ( !prs_uint32( "checksum", ps, depth, &file->checksum ))
	214	return false;
[30]	215
[31]	216	return true;
[30]	217	}
	218
	219
	220	/*******************************************************************
[31]	221	*******************************************************************/
[30]	222	static bool prs_hbin_block( const char desc, prs_struct ps, int depth, REGF_HBIN *hbin )
	223	{
[31]	224	uint32 block_size2;
[30]	225
[31]	226	depth++;
[30]	227
[31]	228	if ( !prs_uint8s( true, "header", ps, depth, hbin->header, sizeof( hbin->header )) )
	229	return false;
[30]	230
[31]	231	if ( !prs_uint32( "first_hbin_off", ps, depth, &hbin->first_hbin_off ))
	232	return false;
[30]	233
[31]	234	/* The dosreg.cpp comments say that the block size is at 0x1c.
	235	According to a WINXP NTUSER.dat file, this is wrong. The block_size
	236	is at 0x08 */
[30]	237
[31]	238	if ( !prs_uint32( "block_size", ps, depth, &hbin->block_size ))
	239	return false;
[30]	240
[31]	241	block_size2 = hbin->block_size;
	242	prs_set_offset( ps, 0x1c );
	243	if ( !prs_uint32( "block_size2", ps, depth, &block_size2 ))
	244	return false;
[30]	245
[31]	246	if ( !ps->io )
	247	hbin->dirty = true;
[30]	248
	249
[31]	250	return true;
[30]	251	}
	252
	253
	254	/*******************************************************************
[31]	255	*******************************************************************/
[33]	256	static bool prs_nk_rec( const char desc, prs_struct ps,
	257	int depth, REGF_NK_REC *nk )
[30]	258	{
[31]	259	uint16 class_length, name_length;
	260	uint32 start;
	261	uint32 data_size, start_off, end_off;
	262	uint32 unknown_off = REGF_OFFSET_NONE;
[30]	263
[31]	264	nk->hbin_off = ps->data_offset;
	265	start = nk->hbin_off;
[30]	266
[31]	267	depth++;
[30]	268
[33]	269	/* back up and get the data_size */
[31]	270	if ( !prs_set_offset( ps, ps->data_offset-sizeof(uint32)) )
	271	return false;
	272	start_off = ps->data_offset;
	273	if ( !prs_uint32( "rec_size", ps, depth, &nk->rec_size ))
	274	return false;
[30]	275
[33]	276	if (!prs_uint8s(true, "header", ps, depth, nk->header, sizeof(nk->header)))
[31]	277	return false;
[30]	278
[31]	279	if ( !prs_uint16( "key_type", ps, depth, &nk->key_type ))
	280	return false;
	281	if ( !smb_io_time( "mtime", &nk->mtime, ps, depth ))
	282	return false;
[30]	283
[31]	284	if ( !prs_set_offset( ps, start+0x0010 ) )
	285	return false;
	286	if ( !prs_uint32( "parent_off", ps, depth, &nk->parent_off ))
	287	return false;
	288	if ( !prs_uint32( "num_subkeys", ps, depth, &nk->num_subkeys ))
	289	return false;
[30]	290
[31]	291	if ( !prs_set_offset( ps, start+0x001c ) )
	292	return false;
	293	if ( !prs_uint32( "subkeys_off", ps, depth, &nk->subkeys_off ))
	294	return false;
	295	if ( !prs_uint32( "unknown_off", ps, depth, &unknown_off) )
	296	return false;
[30]	297
[31]	298	if ( !prs_set_offset( ps, start+0x0024 ) )
	299	return false;
	300	if ( !prs_uint32( "num_values", ps, depth, &nk->num_values ))
	301	return false;
	302	if ( !prs_uint32( "values_off", ps, depth, &nk->values_off ))
	303	return false;
	304	if ( !prs_uint32( "sk_off", ps, depth, &nk->sk_off ))
	305	return false;
	306	if ( !prs_uint32( "classname_off", ps, depth, &nk->classname_off ))
	307	return false;
[30]	308
[33]	309	if (!prs_uint32("max_bytes_subkeyname", ps, depth, &nk->max_bytes_subkeyname))
[31]	310	return false;
[33]	311	if ( !prs_uint32( "max_bytes_subkeyclassname", ps,
	312	depth, &nk->max_bytes_subkeyclassname))
	313	{ return false; }
[31]	314	if ( !prs_uint32( "max_bytes_valuename", ps, depth, &nk->max_bytes_valuename))
	315	return false;
	316	if ( !prs_uint32( "max_bytes_value", ps, depth, &nk->max_bytes_value))
	317	return false;
	318	if ( !prs_uint32( "unknown index", ps, depth, &nk->unk_index))
	319	return false;
[30]	320
[31]	321	name_length = nk->keyname ? strlen(nk->keyname) : 0 ;
	322	class_length = nk->classname ? strlen(nk->classname) : 0 ;
	323	if ( !prs_uint16( "name_length", ps, depth, &name_length ))
	324	return false;
	325	if ( !prs_uint16( "class_length", ps, depth, &class_length ))
	326	return false;
[30]	327
[33]	328	if ( class_length )
	329	{
[31]	330	;;
	331	}
[30]	332
[33]	333	if ( name_length )
	334	{
	335	if(ps->io && !(nk->keyname = (char*)zcalloc(sizeof(char), name_length+1)))
[31]	336	return false;
[30]	337
[31]	338	if ( !prs_uint8s( true, "name", ps, depth, nk->keyname, name_length) )
	339	return false;
[30]	340
[31]	341	if ( ps->io )
	342	nk->keyname[name_length] = '\0';
	343	}
[30]	344
[31]	345	end_off = ps->data_offset;
[30]	346
[33]	347	/* data_size must be divisible by 8 and large enough to hold
	348	the original record */
[30]	349
[31]	350	data_size = ((start_off - end_off) & 0xfffffff8 );
[33]	351	/*if ( data_size > nk->rec_size )
	352	DEBUG(10,("Encountered reused record (0x%x < 0x%x)\n", data_size, nk->rec_size));*/
[30]	353
[33]	354	if ( !ps->io )
	355	nk->hbin->dirty = true;
	356
	357	nk->subkey_index = 0;
[31]	358	return true;
[30]	359	}
	360
	361
	362	/*******************************************************************
[31]	363	*******************************************************************/
[30]	364	static uint32 regf_block_checksum( prs_struct *ps )
	365	{
[31]	366	char *buffer = ps->data_p;
	367	uint32 checksum, x;
	368	int i;
[30]	369
[31]	370	/* XOR of all bytes 0x0000 - 0x01FB */
[30]	371
[31]	372	checksum = x = 0;
[30]	373
[31]	374	for ( i=0; i<0x01FB; i+=4 ) {
	375	x = IVAL(buffer, i );
	376	checksum ^= x;
	377	}
[30]	378
[31]	379	return checksum;
[30]	380	}
	381
	382
	383	/*******************************************************************
[31]	384	*******************************************************************/
[30]	385	static bool read_regf_block( REGF_FILE *file )
	386	{
[31]	387	prs_struct ps;
	388	uint32 checksum;
[30]	389
[31]	390	/* grab the first block from the file */
[30]	391
[31]	392	if ( read_block( file, &ps, 0, REGF_BLOCKSIZE ) == -1 )
	393	return false;
[30]	394
[31]	395	/* parse the block and verify the checksum */
[30]	396
[31]	397	if ( !prs_regf_block( "regf_header", &ps, 0, file ) )
	398	return false;
[30]	399
[31]	400	checksum = regf_block_checksum( &ps );
[30]	401
[31]	402	if(ps.is_dynamic)
	403	SAFE_FREE(ps.data_p);
	404	ps.is_dynamic = false;
	405	ps.buffer_size = 0;
	406	ps.data_offset = 0;
[30]	407
[31]	408	if ( file->checksum != checksum ) {
	409	/DEBUG(0,("read_regf_block: invalid checksum\n" ));/
	410	return false;
	411	}
[30]	412
[31]	413	return true;
[30]	414	}
	415
	416
	417	/*******************************************************************
[31]	418	*******************************************************************/
[30]	419	static REGF_HBIN* read_hbin_block( REGF_FILE *file, off_t offset )
	420	{
[31]	421	REGF_HBIN *hbin;
	422	uint32 record_size, curr_off, block_size, header;
[30]	423
[31]	424	if ( !(hbin = (REGF_HBIN*)zalloc(sizeof(REGF_HBIN))) )
	425	return NULL;
	426	hbin->file_off = offset;
	427	hbin->free_off = -1;
[30]	428
[31]	429	if ( read_block( file, &hbin->ps, offset, 0 ) == -1 )
	430	return NULL;
[30]	431
[31]	432	if ( !prs_hbin_block( "hbin", &hbin->ps, 0, hbin ) )
	433	return NULL;
[30]	434
[31]	435	/* this should be the same thing as hbin->block_size but just in case */
[30]	436
[31]	437	block_size = hbin->ps.buffer_size;
[30]	438
[31]	439	/* Find the available free space offset. Always at the end,
	440	so walk the record list and stop when you get to the end.
	441	The end is defined by a record header of 0xffffffff. The
	442	previous 4 bytes contains the amount of free space remaining
	443	in the hbin block. */
[30]	444
[31]	445	/* remember that the record_size is in the 4 bytes preceeding the record itself */
[30]	446
[31]	447	if ( !prs_set_offset( &hbin->ps, file->data_offset+HBIN_HDR_SIZE-sizeof(uint32) ) )
	448	return false;
[30]	449
[31]	450	record_size = 0;
	451	curr_off = hbin->ps.data_offset;
	452	while ( header != 0xffffffff ) {
	453	/* not done yet so reset the current offset to the
	454	next record_size field */
[30]	455
[31]	456	curr_off = curr_off+record_size;
[30]	457
[31]	458	/* for some reason the record_size of the last record in
	459	an hbin block can extend past the end of the block
	460	even though the record fits within the remaining
	461	space....aaarrrgggghhhhhh */
[30]	462
[31]	463	if ( curr_off >= block_size ) {
	464	record_size = -1;
	465	curr_off = -1;
	466	break;
	467	}
[30]	468
[31]	469	if ( !prs_set_offset( &hbin->ps, curr_off) )
	470	return false;
[30]	471
[31]	472	if ( !prs_uint32( "rec_size", &hbin->ps, 0, &record_size ) )
	473	return false;
	474	if ( !prs_uint32( "header", &hbin->ps, 0, &header ) )
	475	return false;
[30]	476
[31]	477	assert( record_size != 0 );
[30]	478
[31]	479	if ( record_size & 0x80000000 ) {
	480	/* absolute_value(record_size) */
	481	record_size = (record_size ^ 0xffffffff) + 1;
	482	}
	483	}
[30]	484
[31]	485	/* save the free space offset */
[30]	486
[31]	487	if ( header == 0xffffffff ) {
[30]	488
[31]	489	/* account for the fact that the curr_off is 4 bytes behind the actual
	490	record header */
[30]	491
[31]	492	hbin->free_off = curr_off + sizeof(uint32);
	493	hbin->free_size = record_size;
	494	}
[30]	495
[31]	496	/DEBUG(10,("read_hbin_block: free space offset == 0x%x\n", hbin->free_off));/
[30]	497
[31]	498	if ( !prs_set_offset( &hbin->ps, file->data_offset+HBIN_HDR_SIZE ) )
	499	return false;
[30]	500
[31]	501	return hbin;
[30]	502	}
	503
	504
	505	/*******************************************************************
	506	Input a randon offset and receive the correpsonding HBIN
	507	block for it
	508	*******************************************************************/
	509	static bool hbin_contains_offset( REGF_HBIN *hbin, uint32 offset )
	510	{
[31]	511	if ( !hbin )
	512	return false;
[30]	513
[31]	514	if ( (offset > hbin->first_hbin_off) && (offset < (hbin->first_hbin_off+hbin->block_size)) )
	515	return true;
[30]	516
[31]	517	return false;
[30]	518	}
	519
	520
	521	/*******************************************************************
	522	Input a randon offset and receive the correpsonding HBIN
	523	block for it
	524	*******************************************************************/
	525	static REGF_HBIN* lookup_hbin_block( REGF_FILE *file, uint32 offset )
	526	{
[31]	527	REGF_HBIN *hbin = NULL;
	528	uint32 block_off;
[30]	529
[31]	530	/* start with the open list */
[30]	531
[31]	532	for ( hbin=file->block_list; hbin; hbin=hbin->next ) {
	533	/* DEBUG(10,("lookup_hbin_block: address = 0x%x [0x%x]\n", hbin->file_off, (uint32)hbin ));*/
	534	if ( hbin_contains_offset( hbin, offset ) )
	535	return hbin;
	536	}
[30]	537
[31]	538	if ( !hbin ) {
	539	/* start at the beginning */
[30]	540
[31]	541	block_off = REGF_BLOCKSIZE;
	542	do {
	543	/* cleanup before the next round */
	544	if ( hbin )
	545	{
	546	if(hbin->ps.is_dynamic)
	547	SAFE_FREE(hbin->ps.data_p);
	548	hbin->ps.is_dynamic = false;
	549	hbin->ps.buffer_size = 0;
	550	hbin->ps.data_offset = 0;
	551	}
[30]	552
[31]	553	hbin = read_hbin_block( file, block_off );
[30]	554
[31]	555	if ( hbin )
	556	block_off = hbin->file_off + hbin->block_size;
[30]	557
[31]	558	} while ( hbin && !hbin_contains_offset( hbin, offset ) );
	559	}
[30]	560
[31]	561	if ( hbin )
	562	DLIST_ADD( file->block_list, hbin );
[30]	563
[31]	564	return hbin;
[30]	565	}
	566
	567
	568	/*******************************************************************
[31]	569	*******************************************************************/
[30]	570	static bool prs_hash_rec( const char desc, prs_struct ps, int depth, REGF_HASH_REC *hash )
	571	{
[31]	572	depth++;
[30]	573
[31]	574	if ( !prs_uint32( "nk_off", ps, depth, &hash->nk_off ))
	575	return false;
	576	if ( !prs_uint8s( true, "keycheck", ps, depth, hash->keycheck, sizeof( hash->keycheck )) )
	577	return false;
[30]	578
[31]	579	return true;
[30]	580	}
	581
	582
	583	/*******************************************************************
[31]	584	*******************************************************************/
[30]	585	static bool hbin_prs_lf_records( const char desc, REGF_HBIN hbin, int depth, REGF_NK_REC *nk )
	586	{
[31]	587	int i;
	588	REGF_LF_REC *lf = &nk->subkeys;
	589	uint32 data_size, start_off, end_off;
[30]	590
[31]	591	depth++;
[30]	592
[31]	593	/* check if we have anything to do first */
[30]	594
[31]	595	if ( nk->num_subkeys == 0 )
	596	return true;
[30]	597
[31]	598	/* move to the LF record */
[30]	599
[31]	600	if ( !prs_set_offset( &hbin->ps, nk->subkeys_off + HBIN_HDR_SIZE - hbin->first_hbin_off ) )
	601	return false;
[30]	602
[31]	603	/* backup and get the data_size */
[30]	604
[31]	605	if ( !prs_set_offset( &hbin->ps, hbin->ps.data_offset-sizeof(uint32)) )
	606	return false;
	607	start_off = hbin->ps.data_offset;
	608	if ( !prs_uint32( "rec_size", &hbin->ps, depth, &lf->rec_size ))
	609	return false;
[30]	610
[31]	611	if ( !prs_uint8s( true, "header", &hbin->ps, depth, lf->header, sizeof( lf->header )) )
	612	return false;
[30]	613
[31]	614	if ( !prs_uint16( "num_keys", &hbin->ps, depth, &lf->num_keys))
	615	return false;
[30]	616
[31]	617	if ( hbin->ps.io ) {
	618	if ( !(lf->hashes = (REGF_HASH_REC*)zcalloc(sizeof(REGF_HASH_REC), lf->num_keys )) )
	619	return false;
	620	}
[30]	621
[31]	622	for ( i=0; i<lf->num_keys; i++ ) {
	623	if ( !prs_hash_rec( "hash_rec", &hbin->ps, depth, &lf->hashes[i] ) )
	624	return false;
	625	}
[30]	626
[31]	627	end_off = hbin->ps.data_offset;
[30]	628
[31]	629	/* data_size must be divisible by 8 and large enough to hold the original record */
[30]	630
[31]	631	data_size = ((start_off - end_off) & 0xfffffff8 );
[33]	632	/* if ( data_size > lf->rec_size )*/
[31]	633	/DEBUG(10,("Encountered reused record (0x%x < 0x%x)\n", data_size, lf->rec_size));/
[30]	634
[33]	635	if ( !hbin->ps.io )
	636	hbin->dirty = true;
[30]	637
[31]	638	return true;
[30]	639	}
	640
	641
	642	/*******************************************************************
[31]	643	*******************************************************************/
[30]	644	static bool hbin_prs_sk_rec( const char desc, REGF_HBIN hbin, int depth, REGF_SK_REC *sk )
	645	{
[31]	646	prs_struct *ps = &hbin->ps;
	647	uint16 tag = 0xFFFF;
	648	uint32 data_size, start_off, end_off;
[30]	649
	650
[31]	651	depth++;
[30]	652
[31]	653	if ( !prs_set_offset( &hbin->ps, sk->sk_off + HBIN_HDR_SIZE - hbin->first_hbin_off ) )
	654	return false;
[30]	655
[31]	656	/* backup and get the data_size */
[30]	657
[31]	658	if ( !prs_set_offset( &hbin->ps, hbin->ps.data_offset-sizeof(uint32)) )
	659	return false;
	660	start_off = hbin->ps.data_offset;
	661	if ( !prs_uint32( "rec_size", &hbin->ps, depth, &sk->rec_size ))
	662	return false;
[30]	663
[31]	664	if ( !prs_uint8s( true, "header", ps, depth, sk->header, sizeof( sk->header )) )
	665	return false;
	666	if ( !prs_uint16( "tag", ps, depth, &tag))
	667	return false;
[30]	668
[31]	669	if ( !prs_uint32( "prev_sk_off", ps, depth, &sk->prev_sk_off))
	670	return false;
	671	if ( !prs_uint32( "next_sk_off", ps, depth, &sk->next_sk_off))
	672	return false;
	673	if ( !prs_uint32( "ref_count", ps, depth, &sk->ref_count))
	674	return false;
	675	if ( !prs_uint32( "size", ps, depth, &sk->size))
	676	return false;
[30]	677
[31]	678	if ( !sec_io_desc( "sec_desc", &sk->sec_desc, ps, depth ))
	679	return false;
[30]	680
[31]	681	end_off = hbin->ps.data_offset;
[30]	682
[31]	683	/* data_size must be divisible by 8 and large enough to hold the original record */
[30]	684
[31]	685	data_size = ((start_off - end_off) & 0xfffffff8 );
[33]	686	/* if ( data_size > sk->rec_size )*/
[31]	687	/DEBUG(10,("Encountered reused record (0x%x < 0x%x)\n", data_size, sk->rec_size));/
[30]	688
[33]	689	if ( !hbin->ps.io )
	690	hbin->dirty = true;
[30]	691
[31]	692	return true;
[30]	693	}
	694
	695
	696	/*******************************************************************
[31]	697	*******************************************************************/
[30]	698	static bool hbin_prs_vk_rec( const char desc, REGF_HBIN hbin, int depth,
	699	REGF_VK_REC vk, REGF_FILE file )
	700	{
[31]	701	uint32 offset;
	702	uint16 name_length;
	703	prs_struct *ps = &hbin->ps;
	704	uint32 data_size, start_off, end_off;
[30]	705
[31]	706	depth++;
[30]	707
[31]	708	/* backup and get the data_size */
[30]	709
[31]	710	if ( !prs_set_offset( &hbin->ps, hbin->ps.data_offset-sizeof(uint32)) )
	711	return false;
	712	start_off = hbin->ps.data_offset;
	713	if ( !prs_uint32( "rec_size", &hbin->ps, depth, &vk->rec_size ))
	714	return false;
[30]	715
[31]	716	if ( !prs_uint8s( true, "header", ps, depth, vk->header, sizeof( vk->header )) )
	717	return false;
[30]	718
[31]	719	if ( !hbin->ps.io )
	720	name_length = strlen(vk->valuename);
[30]	721
[31]	722	if ( !prs_uint16( "name_length", ps, depth, &name_length ))
	723	return false;
	724	if ( !prs_uint32( "data_size", ps, depth, &vk->data_size ))
	725	return false;
	726	if ( !prs_uint32( "data_off", ps, depth, &vk->data_off ))
	727	return false;
	728	if ( !prs_uint32( "type", ps, depth, &vk->type))
	729	return false;
	730	if ( !prs_uint16( "flag", ps, depth, &vk->flag))
	731	return false;
[30]	732
[31]	733	offset = ps->data_offset;
	734	offset += 2; /* skip 2 bytes */
	735	prs_set_offset( ps, offset );
[30]	736
[31]	737	/* get the name */
[30]	738
[31]	739	if ( vk->flag&VK_FLAG_NAME_PRESENT ) {
[30]	740
[31]	741	if ( hbin->ps.io ) {
	742	if ( !(vk->valuename = (char*)zcalloc(sizeof(char), name_length+1 )))
	743	return false;
	744	}
	745	if ( !prs_uint8s( true, "name", ps, depth, vk->valuename, name_length ) )
	746	return false;
	747	}
[30]	748
[31]	749	end_off = hbin->ps.data_offset;
[30]	750
[31]	751	/* get the data if necessary */
[30]	752
[32]	753	if ( vk->data_size != 0 )
	754	{
[31]	755	bool charmode = false;
[30]	756
[31]	757	if ( (vk->type == REG_SZ) \|\| (vk->type == REG_MULTI_SZ) )
	758	charmode = true;
[30]	759
[31]	760	/* the data is stored in the offset if the size <= 4 */
[32]	761	if ( !(vk->data_size & VK_DATA_IN_OFFSET) )
	762	{
[31]	763	REGF_HBIN *hblock = hbin;
	764	uint32 data_rec_size;
[30]	765
[32]	766	if ( hbin->ps.io )
	767	{
[31]	768	if ( !(vk->data = (uint8*)zcalloc(sizeof(uint8), vk->data_size) ) )
	769	return false;
	770	}
[30]	771
[31]	772	/* this data can be in another hbin */
[32]	773	if ( !hbin_contains_offset( hbin, vk->data_off ) )
	774	{
[31]	775	if ( !(hblock = lookup_hbin_block( file, vk->data_off )) )
	776	return false;
	777	}
[32]	778	if (!(prs_set_offset(&hblock->ps,
	779	(vk->data_off
	780	+ HBIN_HDR_SIZE
	781	- hblock->first_hbin_off)
	782	- sizeof(uint32))))
	783	{ return false; }
[30]	784
[32]	785	if ( !hblock->ps.io )
	786	{
[31]	787	data_rec_size = ( (vk->data_size+sizeof(uint32)) & 0xfffffff8 ) + 8;
	788	data_rec_size = ( data_rec_size - 1 ) ^ 0xFFFFFFFF;
	789	}
	790	if ( !prs_uint32( "data_rec_size", &hblock->ps, depth, &data_rec_size ))
	791	return false;
[32]	792	if(!prs_uint8s(charmode, "data", &hblock->ps, depth,
	793	vk->data, vk->data_size))
[31]	794	return false;
[30]	795
[31]	796	if ( !hblock->ps.io )
	797	hblock->dirty = true;
	798	}
[32]	799	else
	800	{
	801	if(!(vk->data = zcalloc(sizeof(uint8), 4)))
[31]	802	return false;
	803	SIVAL( vk->data, 0, vk->data_off );
	804	}
[30]	805
[31]	806	}
[30]	807
[31]	808	/* data_size must be divisible by 8 and large enough to hold the original record */
[30]	809
[31]	810	data_size = ((start_off - end_off ) & 0xfffffff8 );
[32]	811	/*if ( data_size != vk->rec_size )
	812	DEBUG(10,("prs_vk_rec: data_size check failed (0x%x < 0x%x)\n", data_size, vk->rec_size));*/
[30]	813
[32]	814	if ( !hbin->ps.io )
	815	hbin->dirty = true;
[30]	816
[31]	817	return true;
[30]	818	}
	819
	820
	821	/*******************************************************************
	822	read a VK record which is contained in the HBIN block stored
	823	in the prs_struct *ps.
	824	*******************************************************************/
[32]	825	static bool hbin_prs_vk_records(const char desc, REGF_HBIN hbin,
	826	int depth, REGF_NK_REC nk, REGF_FILE file)
[30]	827	{
[31]	828	int i;
	829	uint32 record_size;
[30]	830
[31]	831	depth++;
[30]	832
[31]	833	/* check if we have anything to do first */
[32]	834	if(nk->num_values == 0)
[31]	835	return true;
[30]	836
[32]	837	if(hbin->ps.io)
	838	{
	839	if (!(nk->values = (REGF_VK_REC*)zcalloc(sizeof(REGF_VK_REC),
	840	nk->num_values )))
[31]	841	return false;
	842	}
[30]	843
[31]	844	/* convert the offset to something relative to this HBIN block */
[32]	845	if (!prs_set_offset(&hbin->ps,
	846	nk->values_off
	847	+ HBIN_HDR_SIZE
	848	- hbin->first_hbin_off
	849	- sizeof(uint32)))
	850	{ return false; }
[30]	851
[32]	852	if ( !hbin->ps.io )
	853	{
[31]	854	record_size = ( ( nk->num_values * sizeof(uint32) ) & 0xfffffff8 ) + 8;
	855	record_size = (record_size - 1) ^ 0xFFFFFFFF;
	856	}
[30]	857
[31]	858	if ( !prs_uint32( "record_size", &hbin->ps, depth, &record_size ) )
	859	return false;
[30]	860
[32]	861	for ( i=0; i<nk->num_values; i++ )
	862	{
[31]	863	if ( !prs_uint32( "vk_off", &hbin->ps, depth, &nk->values[i].rec_off ) )
	864	return false;
	865	}
[30]	866
[32]	867	for ( i=0; i<nk->num_values; i++ )
	868	{
[31]	869	REGF_HBIN *sub_hbin = hbin;
	870	uint32 new_offset;
[30]	871
[32]	872	if ( !hbin_contains_offset( hbin, nk->values[i].rec_off ) )
	873	{
[31]	874	sub_hbin = lookup_hbin_block( file, nk->values[i].rec_off );
[32]	875	if ( !sub_hbin )
	876	{
[31]	877	/*DEBUG(0,("hbin_prs_vk_records: Failed to find HBIN block containing offset [0x%x]\n",
	878	nk->values[i].hbin_off));*/
	879	return false;
	880	}
	881	}
[30]	882
[32]	883	new_offset = nk->values[i].rec_off
	884	+ HBIN_HDR_SIZE
	885	- sub_hbin->first_hbin_off;
	886
	887	if (!prs_set_offset(&sub_hbin->ps, new_offset))
[31]	888	return false;
[32]	889	if (!hbin_prs_vk_rec("vk_rec", sub_hbin, depth, &nk->values[i], file))
[31]	890	return false;
	891	}
[30]	892
[31]	893	if ( !hbin->ps.io )
	894	hbin->dirty = true;
[30]	895
[31]	896	return true;
[30]	897	}
	898
	899
	900	/*******************************************************************
[31]	901	*******************************************************************/
[30]	902	static REGF_SK_REC* find_sk_record_by_offset( REGF_FILE *file, uint32 offset )
	903	{
[31]	904	REGF_SK_REC *p_sk;
[30]	905
[31]	906	for ( p_sk=file->sec_desc_list; p_sk; p_sk=p_sk->next ) {
	907	if ( p_sk->sk_off == offset )
	908	return p_sk;
	909	}
[30]	910
[31]	911	return NULL;
[30]	912	}
	913
[32]	914
[30]	915	/*******************************************************************
[31]	916	*******************************************************************/
[30]	917	static REGF_SK_REC* find_sk_record_by_sec_desc( REGF_FILE file, SEC_DESC sd )
	918	{
[31]	919	REGF_SK_REC *p;
[30]	920
[31]	921	for ( p=file->sec_desc_list; p; p=p->next ) {
	922	if ( sec_desc_equal( p->sec_desc, sd ) )
	923	return p;
	924	}
[30]	925
[31]	926	/* failure */
[30]	927
[31]	928	return NULL;
[30]	929	}
	930
[32]	931
[30]	932	/*******************************************************************
[31]	933	*******************************************************************/
[30]	934	static bool hbin_prs_key( REGF_FILE file, REGF_HBIN hbin, REGF_NK_REC *nk )
	935	{
[31]	936	int depth = 0;
	937	REGF_HBIN *sub_hbin;
[30]	938
[31]	939	depth++;
[30]	940
[31]	941	/* get the initial nk record */
[33]	942	if (!prs_nk_rec("nk_rec", &hbin->ps, depth, nk))
[31]	943	return false;
[30]	944
[31]	945	/* fill in values */
[32]	946	if ( nk->num_values && (nk->values_off!=REGF_OFFSET_NONE) )
	947	{
[31]	948	sub_hbin = hbin;
[32]	949	if ( !hbin_contains_offset( hbin, nk->values_off ) )
	950	{
[31]	951	sub_hbin = lookup_hbin_block( file, nk->values_off );
[32]	952	if ( !sub_hbin )
	953	{
[31]	954	/*DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing value_list_offset [0x%x]\n",
	955	nk->values_off));*/
	956	return false;
	957	}
	958	}
[30]	959
[32]	960	if(!hbin_prs_vk_records("vk_rec", sub_hbin, depth, nk, file))
[31]	961	return false;
	962	}
[30]	963
[31]	964	/* now get subkeys */
[32]	965	if ( nk->num_subkeys && (nk->subkeys_off!=REGF_OFFSET_NONE) )
	966	{
[31]	967	sub_hbin = hbin;
[32]	968	if ( !hbin_contains_offset( hbin, nk->subkeys_off ) )
	969	{
[31]	970	sub_hbin = lookup_hbin_block( file, nk->subkeys_off );
[32]	971	if ( !sub_hbin )
	972	{
[31]	973	/*DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing subkey_offset [0x%x]\n",
	974	nk->subkeys_off));*/
	975	return false;
	976	}
	977	}
[30]	978
[32]	979	if (!hbin_prs_lf_records("lf_rec", sub_hbin, depth, nk))
[31]	980	return false;
	981	}
[30]	982
[31]	983	/* get the to the security descriptor. First look if we have already parsed it */
[30]	984
[32]	985	if ((nk->sk_off!=REGF_OFFSET_NONE)
	986	&& !(nk->sec_desc = find_sk_record_by_offset( file, nk->sk_off )))
	987	{
[31]	988	sub_hbin = hbin;
[32]	989	if (!hbin_contains_offset(hbin, nk->sk_off))
	990	{
[31]	991	sub_hbin = lookup_hbin_block( file, nk->sk_off );
	992	if ( !sub_hbin ) {
	993	/*DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing sk_offset [0x%x]\n",
	994	nk->subkeys_off));*/
	995	return false;
	996	}
	997	}
[30]	998
[31]	999	if ( !(nk->sec_desc = (REGF_SK_REC*)zalloc(sizeof(REGF_SK_REC) )) )
	1000	return false;
	1001	nk->sec_desc->sk_off = nk->sk_off;
	1002	if ( !hbin_prs_sk_rec( "sk_rec", sub_hbin, depth, nk->sec_desc ))
	1003	return false;
[30]	1004
[31]	1005	/* add to the list of security descriptors (ref_count has been read from the files) */
[30]	1006
[31]	1007	nk->sec_desc->sk_off = nk->sk_off;
	1008	DLIST_ADD( file->sec_desc_list, nk->sec_desc );
	1009	}
[30]	1010
[31]	1011	return true;
[30]	1012	}
	1013
[32]	1014
[30]	1015	/*******************************************************************
[31]	1016	*******************************************************************/
[30]	1017	static bool next_record( REGF_HBIN hbin, const char hdr, bool *eob )
	1018	{
[31]	1019	char header[REC_HDR_SIZE] = "";
	1020	uint32 record_size;
	1021	uint32 curr_off, block_size;
	1022	bool found = false;
	1023	prs_struct *ps = &hbin->ps;
[30]	1024
[31]	1025	curr_off = ps->data_offset;
	1026	if ( curr_off == 0 )
	1027	prs_set_offset( ps, HBIN_HEADER_REC_SIZE );
[30]	1028
[31]	1029	/* assume that the current offset is at the reacord header
	1030	and we need to backup to read the record size */
	1031	curr_off -= sizeof(uint32);
[30]	1032
[31]	1033	block_size = ps->buffer_size;
	1034	record_size = 0;
[32]	1035	while ( !found )
	1036	{
[31]	1037	curr_off = curr_off+record_size;
	1038	if ( curr_off >= block_size )
	1039	break;
[30]	1040
[31]	1041	if ( !prs_set_offset( &hbin->ps, curr_off) )
	1042	return false;
[30]	1043
[31]	1044	if ( !prs_uint32( "record_size", ps, 0, &record_size ) )
	1045	return false;
	1046	if ( !prs_uint8s( true, "header", ps, 0, header, REC_HDR_SIZE ) )
	1047	return false;
[30]	1048
[31]	1049	if ( record_size & 0x80000000 ) {
	1050	/* absolute_value(record_size) */
	1051	record_size = (record_size ^ 0xffffffff) + 1;
	1052	}
[30]	1053
[31]	1054	if ( memcmp( header, hdr, REC_HDR_SIZE ) == 0 ) {
	1055	found = true;
	1056	curr_off += sizeof(uint32);
	1057	}
	1058	}
[30]	1059
[31]	1060	/* mark prs_struct as done ( at end ) if no more SK records */
[32]	1061	/* mark end-of-block as true */
	1062	if ( !found )
[31]	1063	{
	1064	prs_set_offset( &hbin->ps, hbin->ps.buffer_size );
	1065	*eob = true;
	1066	return false;
	1067	}
[32]	1068
	1069	if (!prs_set_offset(ps, curr_off))
[31]	1070	return false;
[30]	1071
[31]	1072	return true;
[30]	1073	}
	1074
	1075
	1076	/*******************************************************************
[31]	1077	*******************************************************************/
[32]	1078	static bool next_nk_record(REGF_FILE file, REGF_HBIN hbin,
	1079	REGF_NK_REC nk, bool eob)
[30]	1080	{
[32]	1081	if (next_record(hbin, "nk", eob)
	1082	&& hbin_prs_key(file, hbin, nk))
[31]	1083	return true;
[30]	1084
[31]	1085	return false;
[30]	1086	}
	1087
	1088
	1089	/*******************************************************************
	1090	Open the registry file and then read in the REGF block to get the
	1091	first hbin offset.
	1092	*******************************************************************/
	1093	REGF_FILE* regfio_open( const char *filename )
	1094	{
[31]	1095	REGF_FILE *rb;
	1096	int flags = O_RDONLY;
[30]	1097
[31]	1098	if ( !(rb = (REGF_FILE*)malloc(sizeof(REGF_FILE))) ) {
	1099	/* DEBUG(0,("ERROR allocating memory\n")); */
	1100	return NULL;
	1101	}
	1102	memset(rb, 0, sizeof(REGF_FILE));
	1103	rb->fd = -1;
[30]	1104
[31]	1105	/* if ( !(rb->mem_ctx = talloc_init( "read_regf_block" )) )
	1106	{
	1107	regfio_close( rb );
	1108	return NULL;
	1109	}
	1110	*/
	1111	rb->open_flags = flags;
[30]	1112
[31]	1113	/* open and existing file */
[30]	1114
[31]	1115	if ( (rb->fd = open(filename, flags)) == -1 ) {
	1116	/* DEBUG(0,("regfio_open: failure to open %s (%s)\n", filename, strerror(errno)));*/
	1117	regfio_close( rb );
	1118	return NULL;
	1119	}
[30]	1120
[31]	1121	/* read in an existing file */
[30]	1122
[31]	1123	if ( !read_regf_block( rb ) ) {
	1124	/* DEBUG(0,("regfio_open: Failed to read initial REGF block\n"));*/
	1125	regfio_close( rb );
	1126	return NULL;
	1127	}
[30]	1128
[31]	1129	/* success */
[30]	1130
[31]	1131	return rb;
[30]	1132	}
	1133
	1134
	1135	/*******************************************************************
[31]	1136	*******************************************************************/
[30]	1137	static void regfio_mem_free( REGF_FILE *file )
	1138	{
[31]	1139	/* free any zalloc()'d memory */
[30]	1140
	1141	/* if ( file && file->mem_ctx )
[31]	1142	free(file->mem_ctx);
[30]	1143	*/
	1144	}
	1145
	1146
	1147	/*******************************************************************
[31]	1148	*******************************************************************/
[30]	1149	int regfio_close( REGF_FILE *file )
	1150	{
[31]	1151	int fd;
[30]	1152
[31]	1153	regfio_mem_free( file );
[30]	1154
[31]	1155	/* nothing to do if there is no open file */
[30]	1156
[31]	1157	if ( !file \|\| (file->fd == -1) )
	1158	return 0;
[30]	1159
[31]	1160	fd = file->fd;
	1161	file->fd = -1;
	1162	SAFE_FREE( file );
[30]	1163
[31]	1164	return close( fd );
[30]	1165	}
	1166
	1167
	1168	/*******************************************************************
	1169	There should be only one root key in the registry file based
	1170	on my experience. --jerry
	1171	*******************************************************************/
	1172	REGF_NK_REC* regfio_rootkey( REGF_FILE *file )
	1173	{
[31]	1174	REGF_NK_REC *nk;
	1175	REGF_HBIN *hbin;
	1176	uint32 offset = REGF_BLOCKSIZE;
	1177	bool found = false;
	1178	bool eob;
[30]	1179
[31]	1180	if ( !file )
	1181	return NULL;
[30]	1182
[31]	1183	if ( !(nk = (REGF_NK_REC*)zalloc(sizeof(REGF_NK_REC) )) ) {
	1184	/DEBUG(0,("regfio_rootkey: zalloc() failed!\n"));/
	1185	return NULL;
	1186	}
[30]	1187
[31]	1188	/* scan through the file on HBIN block at a time looking
	1189	for an NK record with a type == 0x002c.
	1190	Normally this is the first nk record in the first hbin
	1191	block (but I'm not assuming that for now) */
[30]	1192
[31]	1193	while ( (hbin = read_hbin_block( file, offset )) ) {
	1194	eob = false;
[30]	1195
[31]	1196	while ( !eob) {
	1197	if ( next_nk_record( file, hbin, nk, &eob ) ) {
	1198	if ( nk->key_type == NK_TYPE_ROOTKEY ) {
	1199	found = true;
	1200	break;
	1201	}
	1202	}
	1203	if(hbin->ps.is_dynamic)
	1204	SAFE_FREE(hbin->ps.data_p);
	1205	hbin->ps.is_dynamic = false;
	1206	hbin->ps.buffer_size = 0;
	1207	hbin->ps.data_offset = 0;
	1208	}
[30]	1209
[31]	1210	if ( found )
	1211	break;
[30]	1212
[31]	1213	offset += hbin->block_size;
	1214	}
[30]	1215
[31]	1216	if ( !found ) {
	1217	/DEBUG(0,("regfio_rootkey: corrupt registry file ? No root key record located\n"));/
	1218	return NULL;
	1219	}
[30]	1220
[31]	1221	DLIST_ADD( file->block_list, hbin );
[30]	1222
[31]	1223	return nk;
[30]	1224	}
	1225
	1226
[33]	1227	/* XXX: An interator struct should be used instead, and this function
	1228	* should operate on it, so the state of iteration isn't stored in the
	1229	* REGF_NK_REC struct itself.
	1230	*/
[30]	1231	/*******************************************************************
	1232	This acts as an interator over the subkeys defined for a given
	1233	NK record. Remember that offsets are from the first HBIN block.
	1234	*******************************************************************/
	1235	REGF_NK_REC* regfio_fetch_subkey( REGF_FILE file, REGF_NK_REC nk )
	1236	{
[31]	1237	REGF_NK_REC *subkey;
	1238	REGF_HBIN *hbin;
	1239	uint32 nk_offset;
[30]	1240
[31]	1241	/* see if there is anything left to report */
[32]	1242	if (!nk \|\| (nk->subkeys_off==REGF_OFFSET_NONE)
	1243	\|\| (nk->subkey_index >= nk->num_subkeys))
[31]	1244	return NULL;
[30]	1245
[31]	1246	/* find the HBIN block which should contain the nk record */
	1247	if(!(hbin
	1248	= lookup_hbin_block(file, nk->subkeys.hashes[nk->subkey_index].nk_off )))
	1249	{
	1250	/*DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing offset [0x%x]\n",
	1251	nk->subkeys.hashes[nk->subkey_index].nk_off));*/
	1252	return NULL;
	1253	}
[30]	1254
[31]	1255	nk_offset = nk->subkeys.hashes[nk->subkey_index].nk_off;
[32]	1256	if(!prs_set_offset(&hbin->ps,
	1257	(HBIN_HDR_SIZE + nk_offset - hbin->first_hbin_off)))
[31]	1258	return NULL;
[30]	1259
[31]	1260	nk->subkey_index++;
[32]	1261	if(!(subkey = (REGF_NK_REC*)zalloc(sizeof(REGF_NK_REC))))
[31]	1262	return NULL;
[30]	1263
[32]	1264	if(!hbin_prs_key(file, hbin, subkey))
[31]	1265	return NULL;
[32]	1266
[31]	1267	return subkey;
[30]	1268	}

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