2 * Unix SMB/Netbios implementation. Version 1.9. SMB parameters and setup
3 * Copyright (C) Andrew Tridgell 1992-1998 Modified by Jeremy Allison 1995.
5 * This program is free software; you can redistribute it and/or modify it under
6 * the terms of the GNU General Public License as published by the Free
7 * Software Foundation; either version 2 of the License, or (at your option)
10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along with
16 * this program; if not, write to the Free Software Foundation, Inc., 675
17 * Mass Ave, Cambridge, MA 02139, USA.
24 static int pw_file_lock_depth = 0;
25 extern int DEBUGLEVEL;
27 static char s_readbuf[1024];
29 /***************************************************************
30 Start to enumerate the smbpasswd list. Returns a void pointer
31 to ensure no modification outside this module.
32 ****************************************************************/
34 static void *startsmbfilepwent(BOOL update)
36 return startfilepwent(lp_smb_passwd_file(), s_readbuf, sizeof(s_readbuf),
37 &pw_file_lock_depth, update);
40 /***************************************************************
41 End enumeration of the smbpasswd list.
42 ****************************************************************/
44 static void endsmbfilepwent(void *vp)
46 endfilepwent(vp, &pw_file_lock_depth);
49 /*************************************************************************
50 Return the current position in the smbpasswd list as an SMB_BIG_UINT.
51 This must be treated as an opaque token.
52 *************************************************************************/
54 static SMB_BIG_UINT getsmbfilepwpos(void *vp)
56 return getfilepwpos(vp);
59 /*************************************************************************
60 Set the current position in the smbpasswd list from an SMB_BIG_UINT.
61 This must be treated as an opaque token.
62 *************************************************************************/
64 static BOOL setsmbfilepwpos(void *vp, SMB_BIG_UINT tok)
66 return setfilepwpos(vp, tok);
69 /*************************************************************************
70 Routine to return the next entry in the smbpasswd list.
72 this function is non-static as it is called (exclusively and only)
73 from getsamfile21pwent().
74 *************************************************************************/
75 struct smb_passwd *getsmbfilepwent(void *vp)
77 /* Static buffers we will return. */
78 static struct smb_passwd pw_buf;
79 static pstring unix_name;
80 static unsigned char smbpwd[16];
81 static unsigned char smbntpwd[16];
89 DEBUG(0,("getsmbfilepwent: Bad password file pointer.\n"));
93 pwdb_init_smb(&pw_buf);
95 pw_buf.acct_ctrl = ACB_NORMAL;
98 * Scan the file, a line at a time.
100 while ((linebuf_len = getfileline(vp, linebuf, sizeof(linebuf))) > 0)
103 * The line we have should be of the form :-
105 * username:uid:32hex bytes:[Account type]:LCT-12345678....other flags presently
110 * username:uid:32hex bytes:32hex bytes:[Account type]:LCT-12345678....ignored....
112 * if Windows NT compatible passwords are also present.
113 * [Account type] is an ascii encoding of the type of account.
114 * LCT-(8 hex digits) is the time_t value of the last change time.
118 * As 256 is shorter than a pstring we don't need to check
119 * length here - if this ever changes....
121 p = strncpyn(unix_name, linebuf, sizeof(unix_name), ':');
128 p = Atoic( p, &uidval, ":");
130 pw_buf.unix_name = unix_name;
131 pw_buf.unix_uid = uidval;
134 * Now get the password value - this should be 32 hex digits
135 * which are the ascii representations of a 16 byte string.
136 * Get two at a time and put them into the password.
142 if (linebuf_len < (PTR_DIFF(p, linebuf) + 33))
144 DEBUG(0, ("getsmbfilepwent: malformed password entry (passwd too short)\n"));
150 DEBUG(0, ("getsmbfilepwent: malformed password entry (no terminating :)\n"));
154 if (!strncasecmp( p, "NO PASSWORD", 11))
156 pw_buf.smb_passwd = NULL;
157 pw_buf.acct_ctrl |= ACB_PWNOTREQ;
161 if (!pwdb_gethexpwd(p, (char *)smbpwd, NULL))
163 DEBUG(0, ("getsmbfilepwent: Malformed Lanman password entry (non hex chars)\n"));
166 pw_buf.smb_passwd = smbpwd;
170 * Now check if the NT compatible password is
173 pw_buf.smb_nt_passwd = NULL;
175 /* Move to the first character of the line after the lanman password. */
177 if ((linebuf_len >= (PTR_DIFF(p, linebuf) + 33)) && (p[32] == ':'))
179 if (*p != '*' && *p != 'X')
181 if(pwdb_gethexpwd(p,(char *)smbntpwd, NULL))
183 pw_buf.smb_nt_passwd = smbntpwd;
186 /* Move to the first character of the line after the NT password. */
190 DEBUG(5,("getsmbfilepwent: returning passwd entry for unix user %s, unix uid %d\n",
195 pw_buf.acct_ctrl = pwdb_decode_acct_ctrl((char*)p);
197 /* Must have some account type set. */
198 if (pw_buf.acct_ctrl == 0)
200 pw_buf.acct_ctrl = ACB_NORMAL;
203 /* Now try and get the last change time. */
204 while (*p != ']' && *p != ':')
215 pw_buf.pass_last_set_time = pwdb_get_last_set_time(p);
220 /* 'Old' style file. Fake up based on user name. */
222 * Currently trust accounts are kept in the same
223 * password file as 'normal accounts'. If this changes
224 * we will have to fix this code. JRA.
226 if (pw_buf.unix_name[strlen(pw_buf.unix_name) - 1] == '$')
228 pw_buf.acct_ctrl &= ~ACB_NORMAL;
229 pw_buf.acct_ctrl |= ACB_WSTRUST;
233 if (*p == '*' || *p == 'X')
235 /* Password deliberately invalid - end here. */
236 DEBUG(10, ("getsmbfilepwent: entry invalidated for unix user %s\n", unix_name));
237 pw_buf.smb_nt_passwd = NULL;
238 pw_buf.smb_passwd = NULL;
239 pw_buf.acct_ctrl |= ACB_DISABLED;
242 DEBUG(6,("unixuser:%s uid:%d acb:%x\n",
243 pw_buf.unix_name, pw_buf.unix_uid, pw_buf.acct_ctrl));
248 DEBUG(5,("getsmbfilepwent: end of file reached.\n"));
252 /************************************************************************
253 Routine to add an entry to the smbpasswd file.
254 *************************************************************************/
256 static BOOL add_smbfilepwd_entry(struct smb_passwd *newpwd)
258 char *pfile = lp_smb_passwd_file();
259 struct smb_passwd *pwd = NULL;
266 int new_entry_length;
271 /* Open the smbpassword file - for update. */
272 fp = startsmbfilepwent(True);
275 DEBUG(0, ("add_smbfilepwd_entry: unable to open file.\n"));
280 * Scan the file, a line at a time and check if the name matches.
283 while ((pwd = getsmbfilepwent(fp)) != NULL) {
284 if (strequal(newpwd->unix_name, pwd->unix_name)) {
285 DEBUG(0, ("add_smbfilepwd_entry: entry with unix name %s already exists\n", pwd->unix_name));
291 /* Ok - entry doesn't exist. We can add it */
293 /* Create a new smb passwd entry and set it to the given password. */
295 * The add user write needs to be atomic - so get the fd from
296 * the fp and do a raw write() call.
300 if((offpos = sys_lseek(fd, 0, SEEK_END)) == -1) {
301 DEBUG(0, ("add_smbfilepwd_entry(sys_lseek): Failed to add entry for user %s to file %s. \
302 Error was %s\n", newpwd->unix_name, pfile, strerror(errno)));
307 new_entry_length = strlen(newpwd->unix_name) + 1 + 15 + 1 + 32 + 1 + 32 + 1 + NEW_PW_FORMAT_SPACE_PADDED_LEN + 1 + 13 + 2;
309 if((new_entry = (char *)malloc( new_entry_length )) == NULL) {
310 DEBUG(0, ("add_smbfilepwd_entry(malloc): Failed to add entry for user %s to file %s. \
311 Error was %s\n", newpwd->unix_name, pfile, strerror(errno)));
316 slprintf(new_entry, new_entry_length - 1, "%s:%u:", newpwd->unix_name, (unsigned)newpwd->unix_uid);
317 p = &new_entry[strlen(new_entry)];
319 if(newpwd->smb_passwd != NULL) {
320 for( i = 0; i < 16; i++) {
321 slprintf((char *)&p[i*2], new_entry_length - (p - new_entry) - 1, "%02X", newpwd->smb_passwd[i]);
325 if(newpwd->acct_ctrl & ACB_PWNOTREQ)
326 safe_strcpy((char *)p, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX", new_entry_length - 1 - (p - new_entry));
328 safe_strcpy((char *)p, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", new_entry_length - 1 - (p - new_entry));
335 if(newpwd->smb_nt_passwd != NULL) {
336 for( i = 0; i < 16; i++) {
337 slprintf((char *)&p[i*2], new_entry_length - 1 - (p - new_entry), "%02X", newpwd->smb_nt_passwd[i]);
340 if(newpwd->acct_ctrl & ACB_PWNOTREQ)
341 safe_strcpy((char *)p, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX", new_entry_length - 1 - (p - new_entry));
343 safe_strcpy((char *)p, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", new_entry_length - 1 - (p - new_entry));
350 /* Add the account encoding and the last change time. */
351 slprintf((char *)p, new_entry_length - 1 - (p - new_entry), "%s:LCT-%08X:\n",
352 pwdb_encode_acct_ctrl(newpwd->acct_ctrl, NEW_PW_FORMAT_SPACE_PADDED_LEN), (uint32)time(NULL));
354 #ifdef DEBUG_PASSWORD
355 DEBUG(100, ("add_smbfilepwd_entry(%d): new_entry_len %d entry_len %d made line |%s|",
356 fd, new_entry_length, strlen(new_entry), new_entry));
359 if ((wr_len = write(fd, new_entry, strlen(new_entry))) != strlen(new_entry)) {
360 DEBUG(0, ("add_smbfilepwd_entry(write): %d Failed to add entry for user %s to file %s. \
361 Error was %s\n", wr_len, newpwd->unix_name, pfile, strerror(errno)));
363 /* Remove the entry we just wrote. */
364 if(sys_ftruncate(fd, offpos) == -1) {
365 DEBUG(0, ("add_smbfilepwd_entry: ERROR failed to ftruncate file %s. \
366 Error was %s. Password file may be corrupt ! Please examine by hand !\n",
367 newpwd->unix_name, strerror(errno)));
380 /************************************************************************
381 Routine to search the smbpasswd file for an entry matching the username.
382 and then modify its password entry. We can't use the startsmbpwent()/
383 getsmbpwent()/endsmbpwent() interfaces here as we depend on looking
384 in the actual file to decide how much room we have to write data.
385 override = False, normal
386 override = True, override XXXXXXXX'd out password or NO PASS
387 ************************************************************************/
389 static BOOL mod_smbfilepwd_entry(struct smb_passwd* pwd, BOOL override)
391 /* Static buffers we will return. */
392 static pstring unix_name;
399 unsigned char *p = NULL;
400 size_t linebuf_len = 0;
403 char *pfile = lp_smb_passwd_file();
404 BOOL found_entry = False;
405 BOOL got_pass_last_set_time = False;
407 SMB_OFF_T pwd_seekpos = 0;
413 #ifdef DEBUG_PASSWORD
414 DEBUG(100,("mod_smbfilepwd_entry: password entries\n"));
415 if (pwd->smb_passwd != NULL)
417 dump_data(100, pwd->smb_passwd, 16);
419 if (pwd->smb_nt_passwd != NULL)
421 dump_data(100, pwd->smb_nt_passwd, 16);
425 DEBUG(0, ("No SMB password file set\n"));
428 DEBUG(10, ("mod_smbfilepwd_entry: opening file %s\n", pfile));
430 fp = sys_fopen(pfile, "r+");
433 DEBUG(0, ("mod_smbfilepwd_entry: unable to open file %s\n", pfile));
436 /* Set a buffer to do more efficient reads */
437 setvbuf(fp, readbuf, _IOFBF, sizeof(readbuf));
441 if (!file_lock(lockfd, F_WRLCK, 5, &pw_file_lock_depth)) {
442 DEBUG(0, ("mod_smbfilepwd_entry: unable to lock file %s\n", pfile));
447 /* Make sure it is only rw by the owner */
450 /* We have a write lock on the file. */
452 * Scan the file, a line at a time and check if the name matches.
455 pwd_seekpos = sys_ftell(fp);
459 fgets(linebuf, sizeof(linebuf), fp);
461 file_unlock(lockfd, &pw_file_lock_depth);
467 * Check if the string is terminated with a newline - if not
468 * then we must keep reading and discard until we get one.
470 linebuf_len = strlen(linebuf);
471 if (linebuf[linebuf_len - 1] != '\n') {
473 while (!ferror(fp) && !feof(fp)) {
480 linebuf[linebuf_len - 1] = '\0';
483 #ifdef DEBUG_PASSWORD
484 DEBUG(100, ("mod_smbfilepwd_entry: got line |%s|\n", linebuf));
487 if ((linebuf[0] == 0) && feof(fp)) {
488 DEBUG(4, ("mod_smbfilepwd_entry: end of file reached\n"));
493 * The line we have should be of the form :-
495 * username:uid:[32hex bytes]:....other flags presently
500 * username:uid:[32hex bytes]:[32hex bytes]:[attributes]:LCT-XXXXXXXX:...ignored.
502 * if Windows NT compatible passwords are also present.
505 if (linebuf[0] == '#' || linebuf[0] == '\0') {
506 DEBUG(6, ("mod_smbfilepwd_entry: skipping comment or blank line\n"));
510 p = (unsigned char *) strchr(linebuf, ':');
513 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry (no :)\n"));
518 * As 256 is shorter than a pstring we don't need to check
519 * length here - if this ever changes....
521 strncpy(unix_name, linebuf, PTR_DIFF(p, linebuf));
522 unix_name[PTR_DIFF(p, linebuf)] = '\0';
523 if (strequal(unix_name, pwd->unix_name)) {
530 file_unlock(lockfd, &pw_file_lock_depth);
535 DEBUG(6, ("mod_smbfilepwd_entry: entry exists\n"));
537 /* User name matches - get uid and password */
538 p++; /* Go past ':' */
541 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry (uid not number)\n"));
542 file_unlock(lockfd, &pw_file_lock_depth);
547 while (*p && isdigit(*p))
550 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry (no : after uid)\n"));
551 file_unlock(lockfd, &pw_file_lock_depth);
557 * Now get the password value - this should be 32 hex digits
558 * which are the ascii representations of a 16 byte string.
559 * Get two at a time and put them into the password.
563 /* Record exact password position */
564 pwd_seekpos += PTR_DIFF(p, linebuf);
566 if (!override && (*p == '*' || *p == 'X')) {
567 /* Password deliberately invalid - end here. */
568 DEBUG(10, ("mod_smbfilepwd_entry: entry invalidated for unix user %s\n", unix_name));
569 file_unlock(lockfd, &pw_file_lock_depth);
574 if (linebuf_len < (PTR_DIFF(p, linebuf) + 33)) {
575 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry (passwd too short)\n"));
576 file_unlock(lockfd,&pw_file_lock_depth);
582 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry (no terminating :)\n"));
583 file_unlock(lockfd,&pw_file_lock_depth);
588 if (!override && (*p == '*' || *p == 'X')) {
589 file_unlock(lockfd,&pw_file_lock_depth);
594 /* Now check if the NT compatible password is
596 p += 33; /* Move to the first character of the line after
597 the lanman password. */
598 if (linebuf_len < (PTR_DIFF(p, linebuf) + 33)) {
599 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry (passwd too short)\n"));
600 file_unlock(lockfd,&pw_file_lock_depth);
606 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry (no terminating :)\n"));
607 file_unlock(lockfd,&pw_file_lock_depth);
613 * Now check if the account info and the password last
614 * change time is available.
616 p += 33; /* Move to the first character of the line after
620 * If both NT and lanman passwords are provided - reset password
624 if(pwd->smb_passwd != NULL || pwd->smb_nt_passwd != NULL) {
625 /* Reqiure password in the future (should ACB_DISABLED also be reset?) */
626 pwd->acct_ctrl &= ~(ACB_PWNOTREQ);
632 encode_bits[i++] = *p++;
633 while((linebuf_len > PTR_DIFF(p, linebuf)) && (*p != ']'))
634 encode_bits[i++] = *p++;
636 encode_bits[i++] = ']';
637 encode_bits[i++] = '\0';
639 if(i == NEW_PW_FORMAT_SPACE_PADDED_LEN) {
641 * We are using a new format, space padded
642 * acct ctrl field. Encode the given acct ctrl
645 fstrcpy(encode_bits, pwdb_encode_acct_ctrl(pwd->acct_ctrl, NEW_PW_FORMAT_SPACE_PADDED_LEN));
648 * If using the old format and the ACB_DISABLED or
649 * ACB_PWNOTREQ are set then set the lanman and NT passwords to NULL
650 * here as we have no space to encode the change.
652 if(pwd->acct_ctrl & (ACB_DISABLED|ACB_PWNOTREQ)) {
653 pwd->smb_passwd = NULL;
654 pwd->smb_nt_passwd = NULL;
658 /* Go past the ']' */
659 if(linebuf_len > PTR_DIFF(p, linebuf))
662 if((linebuf_len > PTR_DIFF(p, linebuf)) && (*p == ':')) {
665 /* We should be pointing at the LCT entry. */
666 if((linebuf_len > (PTR_DIFF(p, linebuf) + 13)) && (StrnCaseCmp((char *)p, "LCT-", 4) == 0)) {
669 for(i = 0; i < 8; i++) {
670 if(p[i] == '\0' || !isxdigit(p[i]))
675 * p points at 8 characters of hex digits -
676 * read into a time_t as the seconds since
677 * 1970 that the password was last changed.
679 got_pass_last_set_time = True;
681 } /* *p && StrnCaseCmp() */
685 /* Entry is correctly formed. */
687 /* Create the 32 byte representation of the new p16 */
688 if(pwd->smb_passwd != NULL) {
689 for (i = 0; i < 16; i++) {
690 slprintf(&ascii_p16[i*2], sizeof(fstring) - 1, "%02X", (uchar) pwd->smb_passwd[i]);
693 if(pwd->acct_ctrl & ACB_PWNOTREQ)
694 fstrcpy(ascii_p16, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX");
696 fstrcpy(ascii_p16, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX");
699 /* Add on the NT md4 hash */
702 if (pwd->smb_nt_passwd != NULL) {
703 for (i = 0; i < 16; i++) {
704 slprintf(&ascii_p16[(i*2)+33], sizeof(fstring) - 1, "%02X", (uchar) pwd->smb_nt_passwd[i]);
707 if(pwd->acct_ctrl & ACB_PWNOTREQ)
708 fstrcpy(&ascii_p16[33], "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX");
710 fstrcpy(&ascii_p16[33], "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX");
713 ascii_p16[66] = '\0'; /* null-terminate the string so that strlen works */
715 /* Add on the account info bits and the time of last
718 pwd->pass_last_set_time = time(NULL);
720 if(got_pass_last_set_time) {
721 slprintf(&ascii_p16[strlen(ascii_p16)],
722 sizeof(ascii_p16)-(strlen(ascii_p16)+1),
724 encode_bits, (uint32)pwd->pass_last_set_time );
725 wr_len = strlen(ascii_p16);
728 #ifdef DEBUG_PASSWORD
729 DEBUG(100,("mod_smbfilepwd_entry: "));
730 dump_data(100, ascii_p16, wr_len);
733 if(wr_len > sizeof(linebuf)) {
734 DEBUG(0, ("mod_smbfilepwd_entry: line to write (%d) is too long.\n", wr_len+1));
735 file_unlock(lockfd,&pw_file_lock_depth);
741 * Do an atomic write into the file at the position defined by
745 /* The mod user write needs to be atomic - so get the fd from
746 the fp and do a raw write() call.
751 if (sys_lseek(fd, pwd_seekpos - 1, SEEK_SET) != pwd_seekpos - 1) {
752 DEBUG(0, ("mod_smbfilepwd_entry: seek fail on file %s.\n", pfile));
753 file_unlock(lockfd,&pw_file_lock_depth);
758 /* Sanity check - ensure the areas we are writing are framed by ':' */
759 if (read(fd, linebuf, wr_len+1) != wr_len+1) {
760 DEBUG(0, ("mod_smbfilepwd_entry: read fail on file %s.\n", pfile));
761 file_unlock(lockfd,&pw_file_lock_depth);
766 if ((linebuf[0] != ':') || (linebuf[wr_len] != ':')) {
767 DEBUG(0, ("mod_smbfilepwd_entry: check on passwd file %s failed.\n", pfile));
768 file_unlock(lockfd,&pw_file_lock_depth);
773 if (sys_lseek(fd, pwd_seekpos, SEEK_SET) != pwd_seekpos) {
774 DEBUG(0, ("mod_smbfilepwd_entry: seek fail on file %s.\n", pfile));
775 file_unlock(lockfd,&pw_file_lock_depth);
780 if (write(fd, ascii_p16, wr_len) != wr_len) {
781 DEBUG(0, ("mod_smbfilepwd_entry: write failed in passwd file %s\n", pfile));
782 file_unlock(lockfd,&pw_file_lock_depth);
787 file_unlock(lockfd,&pw_file_lock_depth);
792 static struct smb_passdb_ops file_ops = {
797 iterate_getsmbpwnam, /* In passdb.c */
798 iterate_getsmbpwuid, /* In passdb.c */
800 add_smbfilepwd_entry,
804 struct smb_passdb_ops *file_initialise_password_db(void)
810 /* Do *NOT* make this function static. It breaks the compile on gcc. JRA */
811 void smbpass_dummy_function(void) { } /* stop some compilers complaining */
812 #endif /* USE_SMBPASS_DB */