2 Samba Unix/Linux SMB client utility profiles.c
3 Copyright (C) 2002 Richard Sharpe, rsharpe@richardsharpe.com
4 Copyright (C) 2003 Jelmer Vernooij (conversion to popt)
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
20 /*************************************************************************
22 A utility to report and change SIDs in registry files
24 Many of the ideas in here come from other people and software.
25 I first looked in Wine in misc/registry.c and was also influenced by
26 http://www.wednesday.demon.co.uk/dosreg.html
28 Which seems to contain comments from someone else. I reproduce them here
29 incase the site above disappears. It actually comes from
30 http://home.eunet.no/~pnordahl/ntpasswd/WinReg.txt.
32 The windows NT registry has 2 different blocks, where one can occure many
38 "regf" is obviously the abbreviation for "Registry file". "regf" is the
39 signature of the header-block which is always 4kb in size, although only
40 the first 64 bytes seem to be used and a checksum is calculated over
41 the first 0x200 bytes only!
44 0x00000000 D-Word ID: ASCII-"regf" = 0x66676572
45 0x00000004 D-Word ???? //see struct REGF
46 0x00000008 D-Word ???? Always the same value as at 0x00000004
47 0x0000000C Q-Word last modify date in WinNT date-format
52 0x00000024 D-Word Offset of 1st key record
53 0x00000028 D-Word Size of the data-blocks (Filesize-4kb)
55 0x000001FC D-Word Sum of all D-Words from 0x00000000 to
56 0x000001FB //XOR of all words. Nigel
58 I have analyzed more registry files (from multiple machines running
59 NT 4.0 german version) and could not find an explanation for the values
60 marked with ???? the rest of the first 4kb page is not important...
64 I don't know what "hbin" stands for, but this block is always a multiple
67 Inside these hbin-blocks the different records are placed. The memory-
68 management looks like a C-compiler heap management to me...
73 0x0000 D-Word ID: ASCII-"hbin" = 0x6E696268
74 0x0004 D-Word Offset from the 1st hbin-Block
75 0x0008 D-Word Offset to the next hbin-Block
76 0x001C D-Word Block-size
78 The values in 0x0008 and 0x001C should be the same, so I don't know
79 if they are correct or swapped...
81 From offset 0x0020 inside a hbin-block data is stored with the following
85 0x0000 D-Word Data-block size //this size must be a
89 If the size field is negative (bit 31 set), the corresponding block
90 is free and has a size of -blocksize!
92 The data is stored as one record per block. Block size is a multiple
93 of 4 and the last block reaches the next hbin-block, leaving no room.
95 Records in the hbin-blocks
96 ==========================
100 The nk-record can be treated as a kombination of tree-record and
101 key-record of the win 95 registry.
105 The lf-record is the counterpart to the RGKN-record (the
110 The vk-record consists information to a single value.
114 sk (? Security Key ?) is the ACL of the registry.
118 The value-lists contain information about which values are inside a
119 sub-key and don't have a header.
123 The datas of the registry are (like the value-list) stored without a
126 All offset-values are relative to the first hbin-block and point to the
127 block-size field of the record-entry. to get the file offset, you have to add
128 the header size (4kb) and the size field (4 bytes)...
133 0x0000 Word ID: ASCII-"nk" = 0x6B6E
134 0x0002 Word for the root-key: 0x2C, otherwise 0x20 //key symbolic links 0x10. Nigel
135 0x0004 Q-Word write-date/time in windows nt notation
136 0x0010 D-Word Offset of Owner/Parent key
137 0x0014 D-Word number of sub-Keys
138 0x001C D-Word Offset of the sub-key lf-Records
139 0x0024 D-Word number of values
140 0x0028 D-Word Offset of the Value-List
141 0x002C D-Word Offset of the sk-Record
143 0x0030 D-Word Offset of the Class-Name //see NK structure for the use of these fields. Nigel
144 0x0044 D-Word Unused (data-trash) //some kind of run time index. Does not appear to be important. Nigel
145 0x0048 Word name-length
146 0x004A Word class-name length
152 0x0000 D-Word Offset 1st Value
153 0x0004 D-Word Offset 2nd Value
154 0x???? D-Word Offset nth Value
156 To determine the number of values, you have to look at the owner-nk-record!
161 0x0000 Word ID: ASCII-"vk" = 0x6B76
162 0x0002 Word name length
163 0x0004 D-Word length of the data //if top bit is set when offset contains data. Nigel
164 0x0008 D-Word Offset of Data
165 0x000C D-Word Type of value
167 0x0012 Word Unused (data-trash)
170 If bit 0 of the flag-word is set, a name is present, otherwise the value has no name (=default)
172 If the data-size is lower 5, the data-offset value is used to store the data itself!
177 0x0001 RegSZ: character string (in UNICODE!)
178 0x0002 ExpandSZ: string with "%var%" expanding (UNICODE!)
179 0x0003 RegBin: raw-binary value
180 0x0004 RegDWord: Dword
181 0x0007 RegMultiSZ: multiple strings, separated with 0
187 0x0000 Word ID: ASCII-"lf" = 0x666C
188 0x0002 Word number of keys
189 0x0004 ???? Hash-Records
194 0x0000 D-Word Offset of corresponding "nk"-Record
195 0x0004 D-Word ASCII: the first 4 characters of the key-name, padded with 0's. Case sensitiv!
197 Keep in mind, that the value at 0x0004 is used for checking the data-consistency! If you change the
198 key-name you have to change the hash-value too!
200 //These hashrecords must be sorted low to high within the lf record. Nigel.
204 (due to the complexity of the SAM-info, not clear jet)
207 0x0000 Word ID: ASCII-"sk" = 0x6B73
209 0x0004 D-Word Offset of previous "sk"-Record
210 0x0008 D-Word Offset of next "sk"-Record
211 0x000C D-Word usage-counter
212 0x0010 D-Word Size of "sk"-record in bytes
214 relative security desciptor. Nigel
215 ???? ???? Security and auditing settings...
218 The usage counter counts the number of references to this
219 "sk"-record. You can use one "sk"-record for the entire registry!
221 Windows nt date/time format
222 ===========================
223 The time-format is a 64-bit integer which is incremented every
224 0,0000001 seconds by 1 (I don't know how accurate it realy is!)
225 It starts with 0 at the 1st of january 1601 0:00! All values are
226 stored in GMT time! The time-zone is important to get the real
229 Common values for win95 and win-nt
230 ==================================
231 Offset values marking an "end of list", are either 0 or -1 (0xFFFFFFFF).
232 If a value has no name (length=0, flag(bit 0)=0), it is treated as the
234 If a value has no data (length=0), it is displayed as empty.
236 simplyfied win-3.?? registry:
237 =============================
240 | next rec. |---+ +----->+------------+
241 | first sub | | | | Usage cnt. |
242 | name | | +-->+------------+ | | length |
243 | value | | | | next rec. | | | text |------->+-------+
244 +-----------+ | | | name rec. |--+ +------------+ | xxxxx |
245 +------------+ | | value rec. |-------->+------------+ +-------+
246 v | +------------+ | Usage cnt. |
247 +-----------+ | | length |
248 | next rec. | | | text |------->+-------+
249 | first sub |------+ +------------+ | xxxxx |
254 Greatly simplyfied structure of the nt-registry:
255 ================================================
257 +---------------------------------------------------------------+
260 +---------+ +---------->+-----------+ +----->+---------+ |
261 | "nk" | | | lf-rec. | | | nk-rec. | |
262 | ID | | | # of keys | | | parent |---+
263 | Date | | | 1st key |--+ | .... |
264 | parent | | +-----------+ +---------+
266 | values |--------------------->+----------+
267 | SK-rec. |---------------+ | 1. value |--> +----------+
268 | class |--+ | +----------+ | vk-rec. |
269 +---------+ | | | .... |
270 v | | data |--> +-------+
271 +------------+ | +----------+ | xxxxx |
272 | Class name | | +-------+
275 +---------+ +---------+
276 +----->| next sk |--->| Next sk |--+
277 | +---| prev sk |<---| prev sk | |
278 | | | .... | | ... | |
279 | | +---------+ +---------+ |
282 +-------------------------------+
284 ---------------------------------------------------------------------------
286 Hope this helps.... (Although it was "fun" for me to uncover this things,
287 it took me several sleepless nights ;)
291 *************************************************************************/
292 #include "includes.h"
295 #include <sys/types.h>
296 #include <sys/stat.h>
299 typedef unsigned int DWORD
;
300 typedef unsigned short WORD
;
302 #define REG_REGF_ID 0x66676572
304 typedef struct regf_block
{
305 DWORD REGF_ID
; /* regf */
313 DWORD first_key
; /* offset */
314 unsigned int dblk_size
;
315 DWORD uk7
[116]; /* 1 */
319 typedef struct hbin_sub_struct
{
324 #define REG_HBIN_ID 0x6E696268
326 typedef struct hbin_struct
{
327 DWORD HBIN_ID
; /* hbin */
335 HBIN_SUB_HDR hbin_sub_hdr
;
338 #define REG_NK_ID 0x6B6E
340 typedef struct nk_struct
{
356 #define REG_SK_ID 0x6B73
358 typedef struct sk_struct
{
368 typedef struct sec_desc_rec
{
377 typedef struct ace_struct
{
380 unsigned short length
;
385 typedef struct acl_struct
{
389 ACE
*aces
; /* One or more ACEs */
392 #define OFF(f) (0x1000 + (f) + 4)
394 static void print_sid(DOM_SID
*sid
);
397 DOM_SID old_sid
, new_sid
;
398 int change
= 0, new = 0;
400 /* Compare two SIDs for equality */
401 static int my_sid_equal(DOM_SID
*s1
, DOM_SID
*s2
)
405 if (s1
->sid_rev_num
!= s2
->sid_rev_num
) return 0;
407 sa1
= s1
->num_auths
; sa2
= s2
->num_auths
;
409 if (sa1
!= sa2
) return 0;
411 return !memcmp((char *)&s1
->id_auth
, (char *)&s2
->id_auth
,
417 * Quick and dirty to read a SID in S-1-5-21-x-y-z-rid format and
418 * construct a DOM_SID
420 static int get_sid(DOM_SID
*sid
, const unsigned char *sid_str
)
423 const unsigned char *lstr
;
425 if (strncmp(sid_str
, "S-1-5", 5)) {
426 fprintf(stderr
, "Does not conform to S-1-5...: %s\n", sid_str
);
430 /* We only allow strings of form S-1-5... */
432 sid
->sid_rev_num
= 1;
438 if (!lstr
|| !lstr
[0] || sscanf(lstr
, "-%u", &auth
) == 0) {
440 fprintf(stderr
, "Not of form -d-d...: %s, %u\n", lstr
, i
);
448 SIVAL(&sid
->sub_auths
[i
], 0, auth
);
450 lstr
= (const unsigned char *)strchr(lstr
+ 1, '-');
459 * Replace SID1, component by component with SID2
460 * Assumes will never be called with unequal length SIDS
461 * so only touches 21-x-y-z-rid portion
462 * This routine does not need to deal with endianism as
463 * long as the incoming SIDs are both in the same (LE) format.
465 static void change_sid(DOM_SID
*s1
, DOM_SID
*s2
)
469 for (i
=0; i
<s1
->num_auths
; i
++) {
470 s1
->sub_auths
[i
] = s2
->sub_auths
[i
];
476 static void print_sid(DOM_SID
*sid
)
478 int i
, comps
= sid
->num_auths
;
479 fprintf(stdout
, "S-%u-%u", sid
->sid_rev_num
, sid
->id_auth
[5]);
481 for (i
= 0; i
< comps
; i
++) {
483 fprintf(stdout
, "-%u", IVAL(&sid
->sub_auths
[i
],0));
486 fprintf(stdout
, "\n");
489 static void process_sid(DOM_SID
*sid
, DOM_SID
*o_sid
, DOM_SID
*n_sid
)
492 if (my_sid_equal(sid
, o_sid
)) {
494 for (i
=0; i
<sid
->num_auths
; i
++) {
495 sid
->sub_auths
[i
] = n_sid
->sub_auths
[i
];
503 static void process_acl(ACL
*acl
, const char *prefix
)
508 ace_cnt
= IVAL(&acl
->num_aces
, 0);
509 ace
= (ACE
*)&acl
->aces
;
510 if (verbose
) fprintf(stdout
, "%sACEs: %u\n", prefix
, ace_cnt
);
511 for (i
=0; i
<ace_cnt
; i
++) {
512 if (verbose
) fprintf(stdout
, "%s Perms: %08X, SID: ", prefix
,
513 IVAL(&ace
->perms
, 0));
515 process_sid(&ace
->trustee
, &old_sid
, &new_sid
);
516 print_sid(&ace
->trustee
);
517 ace
= (ACE
*)((char *)ace
+ SVAL(&ace
->length
, 0));
521 int main(int argc
, char *argv
[])
531 DWORD first_sk_off
, sk_off
;
532 MY_SEC_DESC
*sec_desc
;
534 struct poptOption long_options
[] = {
536 { "verbose", 'v', POPT_ARG_NONE
, NULL
, 'v', "Sets verbose mode" },
537 { "change-sid", 'c', POPT_ARG_STRING
, NULL
, 'c', "Provides SID to change" },
538 { "new-sid", 'n', POPT_ARG_STRING
, NULL
, 'n', "Provides SID to change to" },
544 pc
= poptGetContext("profiles", argc
, (const char **)argv
, long_options
,
545 POPT_CONTEXT_KEEP_FIRST
);
547 poptSetOtherOptionHelp(pc
, "<profilefile>");
550 * Now, process the arguments
553 while ((opt
= poptGetNextOpt(pc
)) != -1) {
557 if (!get_sid(&old_sid
, poptGetOptArg(pc
))) {
558 fprintf(stderr
, "Argument to -c should be a SID in form of S-1-5-...\n");
559 poptPrintUsage(pc
, stderr
, 0);
566 if (!get_sid(&new_sid
, poptGetOptArg(pc
))) {
567 fprintf(stderr
, "Argument to -n should be a SID in form of S-1-5-...\n");
568 poptPrintUsage(pc
, stderr
, 0);
580 if (!poptPeekArg(pc
)) {
581 poptPrintUsage(pc
, stderr
, 0);
585 if ((!change
& new) || (change
& !new)) {
586 fprintf(stderr
, "You must specify both -c and -n if one or the other is set!\n");
587 poptPrintUsage(pc
, stderr
, 0);
591 poptGetArg(pc
); /* To get argv[0] */
593 fd
= open(poptPeekArg(pc
), O_RDWR
, 0000);
596 fprintf(stderr
, "Could not open %s: %s\n", poptPeekArg(pc
),
601 if (fstat(fd
, &sbuf
) < 0) {
602 fprintf(stderr
, "Could not stat file %s, %s\n", poptPeekArg(pc
),
608 * Now, mmap the file into memory, check the header and start
609 * dealing with the records. We are interested in the sk record
614 base
= mmap(&start
, sbuf
.st_size
, PROT_READ
| PROT_WRITE
, MAP_SHARED
, fd
, 0);
620 if ((int)base
== -1) {
621 fprintf(stderr
, "Could not mmap file: %s, %s\n", poptPeekArg(pc
),
627 * In what follows, and in places above, in order to work on both LE and
628 * BE platforms, we have to use the Samba macros to extract SHORT, LONG
629 * and associated UNSIGNED quantities from the data in the mmap'd file.
630 * NOTE, however, that we do not need to do anything with memory
631 * addresses that we construct from pointers in our address space.
634 * sec_desc = (MY_SEC_DESC *)&(sk_hdr->sec_desc[0]);
636 * is simply taking the address of a structure we already have the address
637 * of in our address space, while, the fields within it, will have to
638 * be accessed with the macros:
640 * owner_sid = (DOM_SID *)(&sk_hdr->sec_desc[0] +
641 * IVAL(&sec_desc->owner_off, 0));
643 * Which is pulling out an offset and adding it to an existing pointer.
647 regf_hdr
= (REGF_HDR
*)base
;
649 if (verbose
) fprintf(stdout
, "Registry file size: %u\n", (unsigned int)sbuf
.st_size
);
651 if (IVAL(®f_hdr
->REGF_ID
, 0) != REG_REGF_ID
) {
652 fprintf(stderr
, "Incorrect Registry file (doesn't have header ID): %s\n", poptPeekArg(pc
));
656 if (verbose
) fprintf(stdout
, "First Key Off: %u, Data Block Size: %u\n",
657 IVAL(®f_hdr
->first_key
, 0),
658 IVAL(®f_hdr
->dblk_size
, 0));
660 hbin_hdr
= (HBIN_HDR
*)(base
+ 0x1000); /* No need for Endian stuff */
663 * This should be the hbin_hdr
666 if (IVAL(&hbin_hdr
->HBIN_ID
, 0) != REG_HBIN_ID
) {
667 fprintf(stderr
, "Incorrect hbin hdr: %s\n", poptPeekArg(pc
));
671 if (verbose
) fprintf(stdout
, "Next Off: %u, Prev Off: %u\n",
672 IVAL(&hbin_hdr
->next_off
, 0),
673 IVAL(&hbin_hdr
->prev_off
, 0));
675 nk_hdr
= (NK_HDR
*)(base
+ 0x1000 + IVAL(®f_hdr
->first_key
, 0) + 4);
677 if (SVAL(&nk_hdr
->NK_ID
, 0) != REG_NK_ID
) {
678 fprintf(stderr
, "Incorrect NK Header: %s\n", poptPeekArg(pc
));
682 sk_off
= first_sk_off
= IVAL(&nk_hdr
->sk_off
, 0);
684 fprintf(stdout
, "Type: %0x\n", SVAL(&nk_hdr
->type
, 0));
685 fprintf(stdout
, "SK Off : %o\n", (0x1000 + sk_off
+ 4));
688 sk_hdr
= (SK_HDR
*)(base
+ 0x1000 + sk_off
+ 4);
691 DOM_SID
*owner_sid
, *group_sid
;
693 if (SVAL(&sk_hdr
->SK_ID
, 0) != REG_SK_ID
) {
694 fprintf(stderr
, "Incorrect SK Header format: %08X\n",
695 (0x1000 + sk_off
+ 4));
699 if (verbose
) fprintf(stdout
, "Off: %08X, Refs: %u, Size: %u\n",
700 sk_off
, IVAL(&sk_hdr
->ref_cnt
, 0),
701 IVAL(&sk_hdr
->rec_size
, 0));
703 sec_desc
= (MY_SEC_DESC
*)&(sk_hdr
->sec_desc
[0]);
704 owner_sid
= (DOM_SID
*)(&sk_hdr
->sec_desc
[0] +
705 IVAL(&sec_desc
->owner_off
, 0));
706 group_sid
= (DOM_SID
*)(&sk_hdr
->sec_desc
[0] +
707 IVAL(&sec_desc
->group_off
, 0));
708 sacl
= (ACL
*)(&sk_hdr
->sec_desc
[0] +
709 IVAL(&sec_desc
->sacl_off
, 0));
710 dacl
= (ACL
*)(&sk_hdr
->sec_desc
[0] +
711 IVAL(&sec_desc
->dacl_off
, 0));
712 if (verbose
)fprintf(stdout
, " Owner SID: ");
713 if (change
) process_sid(owner_sid
, &old_sid
, &new_sid
);
714 if (verbose
) print_sid(owner_sid
);
715 if (verbose
) fprintf(stdout
, " Group SID: ");
716 if (change
) process_sid(group_sid
, &old_sid
, &new_sid
);
717 if (verbose
) print_sid(group_sid
);
718 fprintf(stdout
, " SACL: ");
719 if (!sec_desc
->sacl_off
) { /* LE zero == BE zero */
720 if (verbose
) fprintf(stdout
, "NONE\n");
723 process_acl(sacl
, " ");
724 if (verbose
) fprintf(stdout
, " DACL: ");
725 if (!sec_desc
->dacl_off
) {
726 if (verbose
) fprintf(stdout
, "NONE\n");
729 process_acl(dacl
, " ");
730 sk_off
= IVAL(&sk_hdr
->prev_off
, 0);
731 sk_hdr
= (SK_HDR
*)(base
+ OFF(IVAL(&sk_hdr
->prev_off
, 0)));
732 } while (sk_off
!= first_sk_off
);
735 munmap(base
, sbuf
.st_size
);