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>
298 #include <sys/mman.h>
300 typedef unsigned int DWORD;
301 typedef unsigned short WORD;
303 #define REG_REGF_ID 0x66676572
305 typedef struct regf_block {
306 DWORD REGF_ID; /* regf */
314 DWORD first_key; /* offset */
315 unsigned int dblk_size;
316 DWORD uk7[116]; /* 1 */
320 typedef struct hbin_sub_struct {
325 #define REG_HBIN_ID 0x6E696268
327 typedef struct hbin_struct {
328 DWORD HBIN_ID; /* hbin */
336 HBIN_SUB_HDR hbin_sub_hdr;
339 #define REG_NK_ID 0x6B6E
341 typedef struct nk_struct {
357 #define REG_SK_ID 0x6B73
359 typedef struct sk_struct {
369 typedef struct sec_desc_rec {
378 typedef struct ace_struct {
381 unsigned short length;
386 typedef struct acl_struct {
390 ACE *aces; /* One or more ACEs */
393 #define OFF(f) (0x1000 + (f) + 4)
395 static void print_sid(DOM_SID *sid);
398 DOM_SID old_sid, new_sid;
399 int change = 0, new = 0;
401 /* Compare two SIDs for equality */
402 static int my_sid_equal(DOM_SID *s1, DOM_SID *s2)
406 if (s1->sid_rev_num != s2->sid_rev_num) return 0;
408 sa1 = s1->num_auths; sa2 = s2->num_auths;
410 if (sa1 != sa2) return 0;
412 return !memcmp((char *)&s1->id_auth, (char *)&s2->id_auth,
418 * Quick and dirty to read a SID in S-1-5-21-x-y-z-rid format and
419 * construct a DOM_SID
421 static int get_sid(DOM_SID *sid, const unsigned char *sid_str)
424 const unsigned char *lstr;
426 if (strncmp(sid_str, "S-1-5", 5)) {
427 fprintf(stderr, "Does not conform to S-1-5...: %s\n", sid_str);
431 /* We only allow strings of form S-1-5... */
433 sid->sid_rev_num = 1;
439 if (!lstr || !lstr[0] || sscanf(lstr, "-%u", &auth) == 0) {
441 fprintf(stderr, "Not of form -d-d...: %s, %u\n", lstr, i);
449 SIVAL(&sid->sub_auths[i], 0, auth);
451 lstr = (const unsigned char *)strchr(lstr + 1, '-');
460 * Replace SID1, component by component with SID2
461 * Assumes will never be called with unequal length SIDS
462 * so only touches 21-x-y-z-rid portion
463 * This routine does not need to deal with endianism as
464 * long as the incoming SIDs are both in the same (LE) format.
466 static void change_sid(DOM_SID *s1, DOM_SID *s2)
470 for (i=0; i<s1->num_auths; i++) {
471 s1->sub_auths[i] = s2->sub_auths[i];
477 static void print_sid(DOM_SID *sid)
479 int i, comps = sid->num_auths;
480 fprintf(stdout, "S-%u-%u", sid->sid_rev_num, sid->id_auth[5]);
482 for (i = 0; i < comps; i++) {
484 fprintf(stdout, "-%u", IVAL(&sid->sub_auths[i],0));
487 fprintf(stdout, "\n");
490 static void process_sid(DOM_SID *sid, DOM_SID *o_sid, DOM_SID *n_sid)
493 if (my_sid_equal(sid, o_sid)) {
495 for (i=0; i<sid->num_auths; i++) {
496 sid->sub_auths[i] = n_sid->sub_auths[i];
504 static void process_acl(ACL *acl, const char *prefix)
509 ace_cnt = IVAL(&acl->num_aces, 0);
510 ace = (ACE *)&acl->aces;
511 if (verbose) fprintf(stdout, "%sACEs: %u\n", prefix, ace_cnt);
512 for (i=0; i<ace_cnt; i++) {
513 if (verbose) fprintf(stdout, "%s Perms: %08X, SID: ", prefix,
514 IVAL(&ace->perms, 0));
516 process_sid(&ace->trustee, &old_sid, &new_sid);
517 print_sid(&ace->trustee);
518 ace = (ACE *)((char *)ace + SVAL(&ace->length, 0));
522 int main(int argc, char *argv[])
532 DWORD first_sk_off, sk_off;
533 MY_SEC_DESC *sec_desc;
535 struct poptOption long_options[] = {
537 { "verbose", 'v', POPT_ARG_NONE, NULL, 'v', "Sets verbose mode" },
538 { "change-sid", 'c', POPT_ARG_STRING, NULL, 'c', "Provides SID to change" },
539 { "new-sid", 'n', POPT_ARG_STRING, NULL, 'n', "Provides SID to change to" },
545 pc = poptGetContext("profiles", argc, (const char **)argv, long_options,
546 POPT_CONTEXT_KEEP_FIRST);
548 poptSetOtherOptionHelp(pc, "<profilefile>");
551 * Now, process the arguments
554 while ((opt = poptGetNextOpt(pc)) != -1) {
558 if (!get_sid(&old_sid, poptGetOptArg(pc))) {
559 fprintf(stderr, "Argument to -c should be a SID in form of S-1-5-...\n");
560 poptPrintUsage(pc, stderr, 0);
567 if (!get_sid(&new_sid, poptGetOptArg(pc))) {
568 fprintf(stderr, "Argument to -n should be a SID in form of S-1-5-...\n");
569 poptPrintUsage(pc, stderr, 0);
581 if (!poptPeekArg(pc)) {
582 poptPrintUsage(pc, stderr, 0);
586 if ((!change & new) || (change & !new)) {
587 fprintf(stderr, "You must specify both -c and -n if one or the other is set!\n");
588 poptPrintUsage(pc, stderr, 0);
592 poptGetArg(pc); /* To get argv[0] */
594 fd = open(poptPeekArg(pc), O_RDWR, 0000);
597 fprintf(stderr, "Could not open %s: %s\n", poptPeekArg(pc),
602 if (fstat(fd, &sbuf) < 0) {
603 fprintf(stderr, "Could not stat file %s, %s\n", poptPeekArg(pc),
609 * Now, mmap the file into memory, check the header and start
610 * dealing with the records. We are interested in the sk record
613 base = mmap(&start, sbuf.st_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
615 if ((int)base == -1) {
616 fprintf(stderr, "Could not mmap file: %s, %s\n", poptPeekArg(pc),
622 * In what follows, and in places above, in order to work on both LE and
623 * BE platforms, we have to use the Samba macros to extract SHORT, LONG
624 * and associated UNSIGNED quantities from the data in the mmap'd file.
625 * NOTE, however, that we do not need to do anything with memory
626 * addresses that we construct from pointers in our address space.
629 * sec_desc = (MY_SEC_DESC *)&(sk_hdr->sec_desc[0]);
631 * is simply taking the address of a structure we already have the address
632 * of in our address space, while, the fields within it, will have to
633 * be accessed with the macros:
635 * owner_sid = (DOM_SID *)(&sk_hdr->sec_desc[0] +
636 * IVAL(&sec_desc->owner_off, 0));
638 * Which is pulling out an offset and adding it to an existing pointer.
642 regf_hdr = (REGF_HDR *)base;
644 if (verbose) fprintf(stdout, "Registry file size: %u\n", (unsigned int)sbuf.st_size);
646 if (IVAL(®f_hdr->REGF_ID, 0) != REG_REGF_ID) {
647 fprintf(stderr, "Incorrect Registry file (doesn't have header ID): %s\n", poptPeekArg(pc));
651 if (verbose) fprintf(stdout, "First Key Off: %u, Data Block Size: %u\n",
652 IVAL(®f_hdr->first_key, 0),
653 IVAL(®f_hdr->dblk_size, 0));
655 hbin_hdr = (HBIN_HDR *)(base + 0x1000); /* No need for Endian stuff */
658 * This should be the hbin_hdr
661 if (IVAL(&hbin_hdr->HBIN_ID, 0) != REG_HBIN_ID) {
662 fprintf(stderr, "Incorrect hbin hdr: %s\n", poptPeekArg(pc));
666 if (verbose) fprintf(stdout, "Next Off: %u, Prev Off: %u\n",
667 IVAL(&hbin_hdr->next_off, 0),
668 IVAL(&hbin_hdr->prev_off, 0));
670 nk_hdr = (NK_HDR *)(base + 0x1000 + IVAL(®f_hdr->first_key, 0) + 4);
672 if (SVAL(&nk_hdr->NK_ID, 0) != REG_NK_ID) {
673 fprintf(stderr, "Incorrect NK Header: %s\n", poptPeekArg(pc));
677 sk_off = first_sk_off = IVAL(&nk_hdr->sk_off, 0);
679 fprintf(stdout, "Type: %0x\n", SVAL(&nk_hdr->type, 0));
680 fprintf(stdout, "SK Off : %o\n", (0x1000 + sk_off + 4));
683 sk_hdr = (SK_HDR *)(base + 0x1000 + sk_off + 4);
686 DOM_SID *owner_sid, *group_sid;
688 if (SVAL(&sk_hdr->SK_ID, 0) != REG_SK_ID) {
689 fprintf(stderr, "Incorrect SK Header format: %08X\n",
690 (0x1000 + sk_off + 4));
694 if (verbose) fprintf(stdout, "Off: %08X, Refs: %u, Size: %u\n",
695 sk_off, IVAL(&sk_hdr->ref_cnt, 0),
696 IVAL(&sk_hdr->rec_size, 0));
698 sec_desc = (MY_SEC_DESC *)&(sk_hdr->sec_desc[0]);
699 owner_sid = (DOM_SID *)(&sk_hdr->sec_desc[0] +
700 IVAL(&sec_desc->owner_off, 0));
701 group_sid = (DOM_SID *)(&sk_hdr->sec_desc[0] +
702 IVAL(&sec_desc->group_off, 0));
703 sacl = (ACL *)(&sk_hdr->sec_desc[0] +
704 IVAL(&sec_desc->sacl_off, 0));
705 dacl = (ACL *)(&sk_hdr->sec_desc[0] +
706 IVAL(&sec_desc->dacl_off, 0));
707 if (verbose)fprintf(stdout, " Owner SID: ");
708 if (change) process_sid(owner_sid, &old_sid, &new_sid);
709 if (verbose) print_sid(owner_sid);
710 if (verbose) fprintf(stdout, " Group SID: ");
711 if (change) process_sid(group_sid, &old_sid, &new_sid);
712 if (verbose) print_sid(group_sid);
713 fprintf(stdout, " SACL: ");
714 if (!sec_desc->sacl_off) { /* LE zero == BE zero */
715 if (verbose) fprintf(stdout, "NONE\n");
718 process_acl(sacl, " ");
719 if (verbose) fprintf(stdout, " DACL: ");
720 if (!sec_desc->dacl_off) {
721 if (verbose) fprintf(stdout, "NONE\n");
724 process_acl(dacl, " ");
725 sk_off = IVAL(&sk_hdr->prev_off, 0);
726 sk_hdr = (SK_HDR *)(base + OFF(IVAL(&sk_hdr->prev_off, 0)));
727 } while (sk_off != first_sk_off);
729 munmap(base, sbuf.st_size);