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source: trunk/lib/regfio.c @ 37

Last change on this file since 37 was 33, checked in by tim, 19 years ago

Fixed some bugs.

rewrote testing code to allow for a path filter expression.

Property svn:keywords set to Id

File size: 33.7 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 33 2005-07-17 19:03:02Z 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" },
	42	{ REG_BINARY, "BIN" },
	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 */
	56	const char* type_val2str(unsigned int val)
	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 */
	69	int type_str2val(const char* str)
	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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