2 Samba Unix/Linux SMB client utility profiles.c
3 Copyright (C) 2002 Richard Sharpe, rsharpe@richardsharpe.com
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
19 /*************************************************************************
21 A utility to report and change SIDs in registry files
23 Many of the ideas in here come from other people and software.
24 I first looked in Wine in misc/registry.c and was also influenced by
25 http://www.wednesday.demon.co.uk/dosreg.html
27 Which seems to contain comments from someone else. I reproduce them here
28 incase the site above disappears. It actually comes from
29 http://home.eunet.no/~pnordahl/ntpasswd/WinReg.txt.
31 The windows NT registry has 2 different blocks, where one can occure many
37 "regf" is obviosly the abbreviation for "Registry file". "regf" is the
38 signature of the header-block which is always 4kb in size, although only
39 the first 64 bytes seem to be used and a checksum is calculated over
40 the first 0x200 bytes only!
43 0x00000000 D-Word ID: ASCII-"regf" = 0x66676572
44 0x00000004 D-Word ???? //see struct REGF
45 0x00000008 D-Word ???? Always the same value as at 0x00000004
46 0x0000000C Q-Word last modify date in WinNT date-format
51 0x00000024 D-Word Offset of 1st key record
52 0x00000028 D-Word Size of the data-blocks (Filesize-4kb)
54 0x000001FC D-Word Sum of all D-Words from 0x00000000 to
55 0x000001FB //XOR of all words. Nigel
57 I have analyzed more registry files (from multiple machines running
58 NT 4.0 german version) and could not find an explanation for the values
59 marked with ???? the rest of the first 4kb page is not important...
63 I don't know what "hbin" stands for, but this block is always a multiple
66 Inside these hbin-blocks the different records are placed. The memory-
67 management looks like a C-compiler heap management to me...
72 0x0000 D-Word ID: ASCII-"hbin" = 0x6E696268
73 0x0004 D-Word Offset from the 1st hbin-Block
74 0x0008 D-Word Offset to the next hbin-Block
75 0x001C D-Word Block-size
77 The values in 0x0008 and 0x001C should be the same, so I don't know
78 if they are correct or swapped...
80 From offset 0x0020 inside a hbin-block data is stored with the following
84 0x0000 D-Word Data-block size //this size must be a
88 If the size field is negative (bit 31 set), the corresponding block
89 is free and has a size of -blocksize!
91 The data is stored as one record per block. Block size is a multiple
92 of 4 and the last block reaches the next hbin-block, leaving no room.
94 Records in the hbin-blocks
95 ==========================
99 The nk-record can be treated as a kombination of tree-record and
100 key-record of the win 95 registry.
104 The lf-record is the counterpart to the RGKN-record (the
109 The vk-record consists information to a single value.
113 sk (? Security Key ?) is the ACL of the registry.
117 The value-lists contain information about which values are inside a
118 sub-key and don't have a header.
122 The datas of the registry are (like the value-list) stored without a
125 All offset-values are relative to the first hbin-block and point to the
126 block-size field of the record-entry. to get the file offset, you have to add
127 the header size (4kb) and the size field (4 bytes)...
132 0x0000 Word ID: ASCII-"nk" = 0x6B6E
133 0x0002 Word for the root-key: 0x2C, otherwise 0x20 //key symbolic links 0x10. Nigel
134 0x0004 Q-Word write-date/time in windows nt notation
135 0x0010 D-Word Offset of Owner/Parent key
136 0x0014 D-Word number of sub-Keys
137 0x001C D-Word Offset of the sub-key lf-Records
138 0x0024 D-Word number of values
139 0x0028 D-Word Offset of the Value-List
140 0x002C D-Word Offset of the sk-Record
142 0x0030 D-Word Offset of the Class-Name //see NK structure for the use of these fields. Nigel
143 0x0044 D-Word Unused (data-trash) //some kind of run time index. Does not appear to be important. Nigel
144 0x0048 Word name-length
145 0x004A Word class-name length
151 0x0000 D-Word Offset 1st Value
152 0x0004 D-Word Offset 2nd Value
153 0x???? D-Word Offset nth Value
155 To determine the number of values, you have to look at the owner-nk-record!
160 0x0000 Word ID: ASCII-"vk" = 0x6B76
161 0x0002 Word name length
162 0x0004 D-Word length of the data //if top bit is set when offset contains data. Nigel
163 0x0008 D-Word Offset of Data
164 0x000C D-Word Type of value
166 0x0012 Word Unused (data-trash)
169 If bit 0 of the flag-word is set, a name is present, otherwise the value has no name (=default)
171 If the data-size is lower 5, the data-offset value is used to store the data itself!
176 0x0001 RegSZ: character string (in UNICODE!)
177 0x0002 ExpandSZ: string with "%var%" expanding (UNICODE!)
178 0x0003 RegBin: raw-binary value
179 0x0004 RegDWord: Dword
180 0x0007 RegMultiSZ: multiple strings, separated with 0
186 0x0000 Word ID: ASCII-"lf" = 0x666C
187 0x0002 Word number of keys
188 0x0004 ???? Hash-Records
193 0x0000 D-Word Offset of corresponding "nk"-Record
194 0x0004 D-Word ASCII: the first 4 characters of the key-name, padded with 0's. Case sensitiv!
196 Keep in mind, that the value at 0x0004 is used for checking the data-consistency! If you change the
197 key-name you have to change the hash-value too!
199 //These hashrecords must be sorted low to high within the lf record. Nigel.
203 (due to the complexity of the SAM-info, not clear jet)
206 0x0000 Word ID: ASCII-"sk" = 0x6B73
208 0x0004 D-Word Offset of previous "sk"-Record
209 0x0008 D-Word Offset of next "sk"-Record
210 0x000C D-Word usage-counter
211 0x0010 D-Word Size of "sk"-record in bytes
213 relative security desciptor. Nigel
214 ???? ???? Security and auditing settings...
217 The usage counter counts the number of references to this
218 "sk"-record. You can use one "sk"-record for the entire registry!
220 Windows nt date/time format
221 ===========================
222 The time-format is a 64-bit integer which is incremented every
223 0,0000001 seconds by 1 (I don't know how accurate it realy is!)
224 It starts with 0 at the 1st of january 1601 0:00! All values are
225 stored in GMT time! The time-zone is important to get the real
228 Common values for win95 and win-nt
229 ==================================
230 Offset values marking an "end of list", are either 0 or -1 (0xFFFFFFFF).
231 If a value has no name (length=0, flag(bit 0)=0), it is treated as the
233 If a value has no data (length=0), it is displayed as empty.
235 simplyfied win-3.?? registry:
236 =============================
239 | next rec. |---+ +----->+------------+
240 | first sub | | | | Usage cnt. |
241 | name | | +-->+------------+ | | length |
242 | value | | | | next rec. | | | text |------->+-------+
243 +-----------+ | | | name rec. |--+ +------------+ | xxxxx |
244 +------------+ | | value rec. |-------->+------------+ +-------+
245 v | +------------+ | Usage cnt. |
246 +-----------+ | | length |
247 | next rec. | | | text |------->+-------+
248 | first sub |------+ +------------+ | xxxxx |
253 Greatly simplyfied structure of the nt-registry:
254 ================================================
256 +---------------------------------------------------------------+
259 +---------+ +---------->+-----------+ +----->+---------+ |
260 | "nk" | | | lf-rec. | | | nk-rec. | |
261 | ID | | | # of keys | | | parent |---+
262 | Date | | | 1st key |--+ | .... |
263 | parent | | +-----------+ +---------+
265 | values |--------------------->+----------+
266 | SK-rec. |---------------+ | 1. value |--> +----------+
267 | class |--+ | +----------+ | vk-rec. |
268 +---------+ | | | .... |
269 v | | data |--> +-------+
270 +------------+ | +----------+ | xxxxx |
271 | Class name | | +-------+
274 +---------+ +---------+
275 +----->| next sk |--->| Next sk |--+
276 | +---| prev sk |<---| prev sk | |
277 | | | .... | | ... | |
278 | | +---------+ +---------+ |
281 +-------------------------------+
283 ---------------------------------------------------------------------------
285 Hope this helps.... (Although it was "fun" for me to uncover this things,
286 it took me several sleepless nights ;)
290 *************************************************************************/
291 #include "includes.h"
294 #include <sys/types.h>
295 #include <sys/stat.h>
297 #include <sys/mman.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 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 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 !bcmp((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 int get_sid(DOM_SID *sid, char *sid_str)
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 = strchr(lstr + 1, '-');
457 * Replace SID1, component by component with SID2
458 * Assumes will never be called with unequal length SIDS
459 * so only touches 21-x-y-z-rid portion
460 * This routine does not need to deal with endianism as
461 * long as the incoming SIDs are both in the same (LE) format.
463 void change_sid(DOM_SID *s1, DOM_SID *s2)
467 for (i=0; i<s1->num_auths; i++) {
468 s1->sub_auths[i] = s2->sub_auths[i];
472 void print_sid(DOM_SID *sid)
474 int i, comps = sid->num_auths;
475 fprintf(stdout, "S-%u-%u", sid->sid_rev_num, sid->id_auth[5]);
477 for (i = 0; i < comps; i++) {
479 fprintf(stdout, "-%u", IVAL(&sid->sub_auths[i],0));
482 fprintf(stdout, "\n");
485 void process_sid(DOM_SID *sid, DOM_SID *o_sid, DOM_SID *n_sid)
488 if (my_sid_equal(sid, o_sid)) {
490 for (i=0; i<sid->num_auths; i++) {
491 sid->sub_auths[i] = n_sid->sub_auths[i];
499 void process_acl(ACL *acl, const char *prefix)
504 ace_cnt = IVAL(&acl->num_aces, 0);
505 ace = (ACE *)&acl->aces;
506 if (verbose) fprintf(stdout, "%sACEs: %u\n", prefix, ace_cnt);
507 for (i=0; i<ace_cnt; i++) {
508 if (verbose) fprintf(stdout, "%s Perms: %08X, SID: ", prefix,
509 IVAL(&ace->perms, 0));
511 process_sid(&ace->trustee, &old_sid, &new_sid);
512 print_sid(&ace->trustee);
513 ace = (ACE *)((char *)ace + SVAL(&ace->length, 0));
519 fprintf(stderr, "usage: profiles [-c <OLD-SID> -n <NEW-SID>] <profilefile>\n");
520 fprintf(stderr, "Version: %s\n", VERSION);
521 fprintf(stderr, "\n\t-v\t sets verbose mode");
522 fprintf(stderr, "\n\t-c S-1-5-21-z-y-x-oldrid - provides SID to change");
523 fprintf(stderr, "\n\t-n S-1-5-21-a-b-c-newrid - provides SID to change to");
524 fprintf(stderr, "\n\t\tBoth must be present if the other is.");
525 fprintf(stderr, "\n\t\tIf neither present, just report the SIDs found\n");
528 int main(int argc, char *argv[])
540 WORD first_sk_off, sk_off;
541 MY_SEC_DESC *sec_desc;
550 * Now, process the arguments
553 while ((opt = getopt(argc, argv, "c:n:v")) != EOF) {
557 if (!get_sid(&old_sid, optarg)) {
558 fprintf(stderr, "Argument to -c should be a SID in form of S-1-5-...\n");
566 if (!get_sid(&new_sid, optarg)) {
567 fprintf(stderr, "Argument to -n should be a SID in form of S-1-5-...\n");
584 if ((!change & new) || (change & !new)) {
585 fprintf(stderr, "You must specify both -c and -n if one or the other is set!\n");
590 fd = open(argv[optind], O_RDWR, 0000);
593 fprintf(stderr, "Could not open %s: %s\n", argv[optind],
598 if (fstat(fd, &sbuf) < 0) {
599 fprintf(stderr, "Could not stat file %s, %s\n", argv[optind],
605 * Now, mmap the file into memory, check the header and start
606 * dealing with the records. We are interested in the sk record
609 base = mmap(&start, sbuf.st_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
611 if ((int)base == -1) {
612 fprintf(stderr, "Could not mmap file: %s, %s\n", argv[optind],
618 * In what follows, and in places above, in order to work on both LE and
619 * BE platforms, we have to use the Samba macros to extract SHORT, LONG
620 * and associated UNSIGNED quantities from the data in the mmap'd file.
621 * NOTE, however, that we do not need to do anything with memory
622 * addresses that we construct from pointers in our address space.
625 * sec_desc = (MY_SEC_DESC *)&(sk_hdr->sec_desc[0]);
627 * is simply taking the address of a structure we already have the address
628 * of in our address space, while, the fields within it, will have to
629 * be accessed with the macros:
631 * owner_sid = (DOM_SID *)(&sk_hdr->sec_desc[0] +
632 * IVAL(&sec_desc->owner_off, 0));
634 * Which is pulling out an offset and adding it to an existing pointer.
638 regf_hdr = (REGF_HDR *)base;
640 if (verbose) fprintf(stdout, "Registry file size: %u\n", (unsigned int)sbuf.st_size);
642 if (IVAL(®f_hdr->REGF_ID, 0) != REG_REGF_ID) {
643 fprintf(stderr, "Incorrect Registry file (doesn't have header ID): %s\n", argv[optind]);
647 if (verbose) fprintf(stdout, "First Key Off: %u, Data Block Size: %u\n",
648 IVAL(®f_hdr->first_key, 0),
649 IVAL(®f_hdr->dblk_size, 0));
651 hbin_hdr = (HBIN_HDR *)(base + 0x1000); /* No need for Endian stuff */
654 * This should be the hbin_hdr
657 if (IVAL(&hbin_hdr->HBIN_ID, 0) != REG_HBIN_ID) {
658 fprintf(stderr, "Incorrect hbin hdr: %s\n", argv[optind]);
662 if (verbose) fprintf(stdout, "Next Off: %u, Prev Off: %u\n",
663 IVAL(&hbin_hdr->next_off, 0),
664 IVAL(&hbin_hdr->prev_off, 0));
666 nk_hdr = (NK_HDR *)(base + 0x1000 + IVAL(®f_hdr->first_key, 0) + 4);
668 if (SVAL(&nk_hdr->NK_ID, 0) != REG_NK_ID) {
669 fprintf(stderr, "Incorrect NK Header: %s\n", argv[optind]);
673 sk_off = first_sk_off = IVAL(&nk_hdr->sk_off, 0);
675 fprintf(stdout, "Type: %0x\n", SVAL(&nk_hdr->type, 0));
676 fprintf(stdout, "SK Off : %o\n", (0x1000 + sk_off + 4));
679 sk_hdr = (SK_HDR *)(base + 0x1000 + sk_off + 4);
682 DOM_SID *owner_sid, *group_sid;
684 if (SVAL(&sk_hdr->SK_ID, 0) != REG_SK_ID) {
685 fprintf(stderr, "Incorrect SK Header format: %08X\n",
686 (0x1000 + sk_off + 4));
690 if (verbose) fprintf(stdout, "Off: %08X, Refs: %u, Size: %u\n",
691 sk_off, IVAL(&sk_hdr->ref_cnt, 0),
692 IVAL(&sk_hdr->rec_size, 0));
694 sec_desc = (MY_SEC_DESC *)&(sk_hdr->sec_desc[0]);
695 owner_sid = (DOM_SID *)(&sk_hdr->sec_desc[0] +
696 IVAL(&sec_desc->owner_off, 0));
697 group_sid = (DOM_SID *)(&sk_hdr->sec_desc[0] +
698 IVAL(&sec_desc->group_off, 0));
699 sacl = (ACL *)(&sk_hdr->sec_desc[0] +
700 IVAL(&sec_desc->sacl_off, 0));
701 dacl = (ACL *)(&sk_hdr->sec_desc[0] +
702 IVAL(&sec_desc->dacl_off, 0));
703 if (verbose)fprintf(stdout, " Owner SID: ");
704 if (change) process_sid(owner_sid, &old_sid, &new_sid);
705 if (verbose) print_sid(owner_sid);
706 if (verbose) fprintf(stdout, " Group SID: ");
707 if (change) process_sid(group_sid, &old_sid, &new_sid);
708 if (verbose) print_sid(group_sid);
709 fprintf(stdout, " SACL: ");
710 if (!sec_desc->sacl_off) { /* LE zero == BE zero */
711 if (verbose) fprintf(stdout, "NONE\n");
714 process_acl(sacl, " ");
715 if (verbose) fprintf(stdout, " DACL: ");
716 if (!sec_desc->dacl_off) {
717 if (verbose) fprintf(stdout, "NONE\n");
720 process_acl(dacl, " ");
721 sk_off = IVAL(&sk_hdr->prev_off, 0);
722 sk_hdr = (SK_HDR *)(base + OFF(IVAL(&sk_hdr->prev_off, 0)));
723 } while (sk_off != first_sk_off);
725 munmap(base, sbuf.st_size);