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 (*p == '*' || *p == 'X')
144 /* Password deliberately invalid - end here. */
145 DEBUG(10, ("getsmbfilepwent: entry invalidated for unix user %s\n", unix_name));
146 pw_buf.smb_nt_passwd = NULL;
147 pw_buf.smb_passwd = NULL;
148 pw_buf.acct_ctrl |= ACB_DISABLED;
152 if (linebuf_len < (PTR_DIFF(p, linebuf) + 33))
154 DEBUG(0, ("getsmbfilepwent: malformed password entry (passwd too short)\n"));
160 DEBUG(0, ("getsmbfilepwent: malformed password entry (no terminating :)\n"));
164 if (!strncasecmp( p, "NO PASSWORD", 11))
166 pw_buf.smb_passwd = NULL;
167 pw_buf.acct_ctrl |= ACB_PWNOTREQ;
171 if (!pwdb_gethexpwd(p, (char *)smbpwd))
173 DEBUG(0, ("getsmbfilepwent: Malformed Lanman password entry (non hex chars)\n"));
176 pw_buf.smb_passwd = smbpwd;
180 * Now check if the NT compatible password is
183 pw_buf.smb_nt_passwd = NULL;
185 /* Move to the first character of the line after the lanman password. */
187 if ((linebuf_len >= (PTR_DIFF(p, linebuf) + 33)) && (p[32] == ':'))
189 if (*p != '*' && *p != 'X')
191 if(pwdb_gethexpwd(p,(char *)smbntpwd))
193 pw_buf.smb_nt_passwd = smbntpwd;
196 /* Move to the first character of the line after the NT password. */
200 DEBUG(5,("getsmbfilepwent: returning passwd entry for unix user %s, unix uid %d\n",
205 pw_buf.acct_ctrl = pwdb_decode_acct_ctrl((char*)p);
207 /* Must have some account type set. */
208 if (pw_buf.acct_ctrl == 0)
210 pw_buf.acct_ctrl = ACB_NORMAL;
213 /* Now try and get the last change time. */
214 while (*p != ']' && *p != ':')
225 pw_buf.pass_last_set_time = pwdb_get_last_set_time(p);
230 /* 'Old' style file. Fake up based on user name. */
232 * Currently trust accounts are kept in the same
233 * password file as 'normal accounts'. If this changes
234 * we will have to fix this code. JRA.
236 if (pw_buf.unix_name[strlen(pw_buf.unix_name) - 1] == '$')
238 pw_buf.acct_ctrl &= ~ACB_NORMAL;
239 pw_buf.acct_ctrl |= ACB_WSTRUST;
246 DEBUG(5,("getsmbfilepwent: end of file reached.\n"));
250 /************************************************************************
251 Routine to add an entry to the smbpasswd file.
252 *************************************************************************/
254 static BOOL add_smbfilepwd_entry(struct smb_passwd *newpwd)
256 char *pfile = lp_smb_passwd_file();
257 struct smb_passwd *pwd = NULL;
264 int new_entry_length;
269 /* Open the smbpassword file - for update. */
270 fp = startsmbfilepwent(True);
273 DEBUG(0, ("add_smbfilepwd_entry: unable to open file.\n"));
278 * Scan the file, a line at a time and check if the name matches.
281 while ((pwd = getsmbfilepwent(fp)) != NULL) {
282 if (strequal(newpwd->unix_name, pwd->unix_name)) {
283 DEBUG(0, ("add_smbfilepwd_entry: entry with unix name %s already exists\n", pwd->unix_name));
289 /* Ok - entry doesn't exist. We can add it */
291 /* Create a new smb passwd entry and set it to the given password. */
293 * The add user write needs to be atomic - so get the fd from
294 * the fp and do a raw write() call.
298 if((offpos = sys_lseek(fd, 0, SEEK_END)) == -1) {
299 DEBUG(0, ("add_smbfilepwd_entry(sys_lseek): Failed to add entry for user %s to file %s. \
300 Error was %s\n", newpwd->unix_name, pfile, strerror(errno)));
305 new_entry_length = strlen(newpwd->unix_name) + 1 + 15 + 1 + 32 + 1 + 32 + 1 + NEW_PW_FORMAT_SPACE_PADDED_LEN + 1 + 13 + 2;
307 if((new_entry = (char *)malloc( new_entry_length )) == NULL) {
308 DEBUG(0, ("add_smbfilepwd_entry(malloc): Failed to add entry for user %s to file %s. \
309 Error was %s\n", newpwd->unix_name, pfile, strerror(errno)));
314 slprintf(new_entry, new_entry_length - 1, "%s:%u:", newpwd->unix_name, (unsigned)newpwd->unix_uid);
315 p = &new_entry[strlen(new_entry)];
317 if(newpwd->smb_passwd != NULL) {
318 for( i = 0; i < 16; i++) {
319 slprintf((char *)&p[i*2], new_entry_length - (p - new_entry) - 1, "%02X", newpwd->smb_passwd[i]);
323 if(newpwd->acct_ctrl & ACB_PWNOTREQ)
324 safe_strcpy((char *)p, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX", new_entry_length - 1 - (p - new_entry));
326 safe_strcpy((char *)p, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", new_entry_length - 1 - (p - new_entry));
333 if(newpwd->smb_nt_passwd != NULL) {
334 for( i = 0; i < 16; i++) {
335 slprintf((char *)&p[i*2], new_entry_length - 1 - (p - new_entry), "%02X", newpwd->smb_nt_passwd[i]);
338 if(newpwd->acct_ctrl & ACB_PWNOTREQ)
339 safe_strcpy((char *)p, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX", new_entry_length - 1 - (p - new_entry));
341 safe_strcpy((char *)p, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", new_entry_length - 1 - (p - new_entry));
348 /* Add the account encoding and the last change time. */
349 slprintf((char *)p, new_entry_length - 1 - (p - new_entry), "%s:LCT-%08X:\n",
350 pwdb_encode_acct_ctrl(newpwd->acct_ctrl, NEW_PW_FORMAT_SPACE_PADDED_LEN), (uint32)time(NULL));
352 #ifdef DEBUG_PASSWORD
353 DEBUG(100, ("add_smbfilepwd_entry(%d): new_entry_len %d entry_len %d made line |%s|",
354 fd, new_entry_length, strlen(new_entry), new_entry));
357 if ((wr_len = write(fd, new_entry, strlen(new_entry))) != strlen(new_entry)) {
358 DEBUG(0, ("add_smbfilepwd_entry(write): %d Failed to add entry for user %s to file %s. \
359 Error was %s\n", wr_len, newpwd->unix_name, pfile, strerror(errno)));
361 /* Remove the entry we just wrote. */
362 if(sys_ftruncate(fd, offpos) == -1) {
363 DEBUG(0, ("add_smbfilepwd_entry: ERROR failed to ftruncate file %s. \
364 Error was %s. Password file may be corrupt ! Please examine by hand !\n",
365 newpwd->unix_name, strerror(errno)));
378 /************************************************************************
379 Routine to search the smbpasswd file for an entry matching the username.
380 and then modify its password entry. We can't use the startsmbpwent()/
381 getsmbpwent()/endsmbpwent() interfaces here as we depend on looking
382 in the actual file to decide how much room we have to write data.
383 override = False, normal
384 override = True, override XXXXXXXX'd out password or NO PASS
385 ************************************************************************/
387 static BOOL mod_smbfilepwd_entry(struct smb_passwd* pwd, BOOL override)
389 /* Static buffers we will return. */
390 static pstring unix_name;
397 unsigned char *p = NULL;
398 size_t linebuf_len = 0;
401 char *pfile = lp_smb_passwd_file();
402 BOOL found_entry = False;
403 BOOL got_pass_last_set_time = False;
405 SMB_OFF_T pwd_seekpos = 0;
412 DEBUG(0, ("No SMB password file set\n"));
415 DEBUG(10, ("mod_smbfilepwd_entry: opening file %s\n", pfile));
417 fp = sys_fopen(pfile, "r+");
420 DEBUG(0, ("mod_smbfilepwd_entry: unable to open file %s\n", pfile));
423 /* Set a buffer to do more efficient reads */
424 setvbuf(fp, readbuf, _IOFBF, sizeof(readbuf));
428 if (!file_lock(lockfd, F_WRLCK, 5, &pw_file_lock_depth)) {
429 DEBUG(0, ("mod_smbfilepwd_entry: unable to lock file %s\n", pfile));
434 /* Make sure it is only rw by the owner */
437 /* We have a write lock on the file. */
439 * Scan the file, a line at a time and check if the name matches.
442 pwd_seekpos = sys_ftell(fp);
446 fgets(linebuf, sizeof(linebuf), fp);
448 file_unlock(lockfd, &pw_file_lock_depth);
454 * Check if the string is terminated with a newline - if not
455 * then we must keep reading and discard until we get one.
457 linebuf_len = strlen(linebuf);
458 if (linebuf[linebuf_len - 1] != '\n') {
460 while (!ferror(fp) && !feof(fp)) {
467 linebuf[linebuf_len - 1] = '\0';
470 #ifdef DEBUG_PASSWORD
471 DEBUG(100, ("mod_smbfilepwd_entry: got line |%s|\n", linebuf));
474 if ((linebuf[0] == 0) && feof(fp)) {
475 DEBUG(4, ("mod_smbfilepwd_entry: end of file reached\n"));
480 * The line we have should be of the form :-
482 * username:uid:[32hex bytes]:....other flags presently
487 * username:uid:[32hex bytes]:[32hex bytes]:[attributes]:LCT-XXXXXXXX:...ignored.
489 * if Windows NT compatible passwords are also present.
492 if (linebuf[0] == '#' || linebuf[0] == '\0') {
493 DEBUG(6, ("mod_smbfilepwd_entry: skipping comment or blank line\n"));
497 p = (unsigned char *) strchr(linebuf, ':');
500 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry (no :)\n"));
505 * As 256 is shorter than a pstring we don't need to check
506 * length here - if this ever changes....
508 strncpy(unix_name, linebuf, PTR_DIFF(p, linebuf));
509 unix_name[PTR_DIFF(p, linebuf)] = '\0';
510 if (strequal(unix_name, pwd->unix_name)) {
517 file_unlock(lockfd, &pw_file_lock_depth);
522 DEBUG(6, ("mod_smbfilepwd_entry: entry exists\n"));
524 /* User name matches - get uid and password */
525 p++; /* Go past ':' */
528 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry (uid not number)\n"));
529 file_unlock(lockfd, &pw_file_lock_depth);
534 while (*p && isdigit(*p))
537 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry (no : after uid)\n"));
538 file_unlock(lockfd, &pw_file_lock_depth);
544 * Now get the password value - this should be 32 hex digits
545 * which are the ascii representations of a 16 byte string.
546 * Get two at a time and put them into the password.
550 /* Record exact password position */
551 pwd_seekpos += PTR_DIFF(p, linebuf);
553 if (!override && (*p == '*' || *p == 'X')) {
554 /* Password deliberately invalid - end here. */
555 DEBUG(10, ("mod_smbfilepwd_entry: entry invalidated for unix user %s\n", unix_name));
556 file_unlock(lockfd, &pw_file_lock_depth);
561 if (linebuf_len < (PTR_DIFF(p, linebuf) + 33)) {
562 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry (passwd too short)\n"));
563 file_unlock(lockfd,&pw_file_lock_depth);
569 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry (no terminating :)\n"));
570 file_unlock(lockfd,&pw_file_lock_depth);
575 if (!override && (*p == '*' || *p == 'X')) {
576 file_unlock(lockfd,&pw_file_lock_depth);
581 /* Now check if the NT compatible password is
583 p += 33; /* Move to the first character of the line after
584 the lanman password. */
585 if (linebuf_len < (PTR_DIFF(p, linebuf) + 33)) {
586 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry (passwd too short)\n"));
587 file_unlock(lockfd,&pw_file_lock_depth);
593 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry (no terminating :)\n"));
594 file_unlock(lockfd,&pw_file_lock_depth);
600 * Now check if the account info and the password last
601 * change time is available.
603 p += 33; /* Move to the first character of the line after
607 * If both NT and lanman passwords are provided - reset password
611 if(pwd->smb_passwd != NULL || pwd->smb_nt_passwd != NULL) {
612 /* Reqiure password in the future (should ACB_DISABLED also be reset?) */
613 pwd->acct_ctrl &= ~(ACB_PWNOTREQ);
619 encode_bits[i++] = *p++;
620 while((linebuf_len > PTR_DIFF(p, linebuf)) && (*p != ']'))
621 encode_bits[i++] = *p++;
623 encode_bits[i++] = ']';
624 encode_bits[i++] = '\0';
626 if(i == NEW_PW_FORMAT_SPACE_PADDED_LEN) {
628 * We are using a new format, space padded
629 * acct ctrl field. Encode the given acct ctrl
632 fstrcpy(encode_bits, pwdb_encode_acct_ctrl(pwd->acct_ctrl, NEW_PW_FORMAT_SPACE_PADDED_LEN));
635 * If using the old format and the ACB_DISABLED or
636 * ACB_PWNOTREQ are set then set the lanman and NT passwords to NULL
637 * here as we have no space to encode the change.
639 if(pwd->acct_ctrl & (ACB_DISABLED|ACB_PWNOTREQ)) {
640 pwd->smb_passwd = NULL;
641 pwd->smb_nt_passwd = NULL;
645 /* Go past the ']' */
646 if(linebuf_len > PTR_DIFF(p, linebuf))
649 if((linebuf_len > PTR_DIFF(p, linebuf)) && (*p == ':')) {
652 /* We should be pointing at the LCT entry. */
653 if((linebuf_len > (PTR_DIFF(p, linebuf) + 13)) && (StrnCaseCmp((char *)p, "LCT-", 4) == 0)) {
656 for(i = 0; i < 8; i++) {
657 if(p[i] == '\0' || !isxdigit(p[i]))
662 * p points at 8 characters of hex digits -
663 * read into a time_t as the seconds since
664 * 1970 that the password was last changed.
666 got_pass_last_set_time = True;
668 } /* *p && StrnCaseCmp() */
672 /* Entry is correctly formed. */
674 /* Create the 32 byte representation of the new p16 */
675 if(pwd->smb_passwd != NULL) {
676 for (i = 0; i < 16; i++) {
677 slprintf(&ascii_p16[i*2], sizeof(fstring) - 1, "%02X", (uchar) pwd->smb_passwd[i]);
680 if(pwd->acct_ctrl & ACB_PWNOTREQ)
681 fstrcpy(ascii_p16, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX");
683 fstrcpy(ascii_p16, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX");
686 /* Add on the NT md4 hash */
689 if (pwd->smb_nt_passwd != NULL) {
690 for (i = 0; i < 16; i++) {
691 slprintf(&ascii_p16[(i*2)+33], sizeof(fstring) - 1, "%02X", (uchar) pwd->smb_nt_passwd[i]);
694 if(pwd->acct_ctrl & ACB_PWNOTREQ)
695 fstrcpy(&ascii_p16[33], "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX");
697 fstrcpy(&ascii_p16[33], "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX");
700 ascii_p16[66] = '\0'; /* null-terminate the string so that strlen works */
702 /* Add on the account info bits and the time of last
705 pwd->pass_last_set_time = time(NULL);
707 if(got_pass_last_set_time) {
708 slprintf(&ascii_p16[strlen(ascii_p16)],
709 sizeof(ascii_p16)-(strlen(ascii_p16)+1),
711 encode_bits, (uint32)pwd->pass_last_set_time );
712 wr_len = strlen(ascii_p16);
715 #ifdef DEBUG_PASSWORD
716 DEBUG(100,("mod_smbfilepwd_entry: "));
717 dump_data(100, ascii_p16, wr_len);
720 if(wr_len > sizeof(linebuf)) {
721 DEBUG(0, ("mod_smbfilepwd_entry: line to write (%d) is too long.\n", wr_len+1));
722 file_unlock(lockfd,&pw_file_lock_depth);
728 * Do an atomic write into the file at the position defined by
732 /* The mod user write needs to be atomic - so get the fd from
733 the fp and do a raw write() call.
738 if (sys_lseek(fd, pwd_seekpos - 1, SEEK_SET) != pwd_seekpos - 1) {
739 DEBUG(0, ("mod_smbfilepwd_entry: seek fail on file %s.\n", pfile));
740 file_unlock(lockfd,&pw_file_lock_depth);
745 /* Sanity check - ensure the areas we are writing are framed by ':' */
746 if (read(fd, linebuf, wr_len+1) != wr_len+1) {
747 DEBUG(0, ("mod_smbfilepwd_entry: read fail on file %s.\n", pfile));
748 file_unlock(lockfd,&pw_file_lock_depth);
753 if ((linebuf[0] != ':') || (linebuf[wr_len] != ':')) {
754 DEBUG(0, ("mod_smbfilepwd_entry: check on passwd file %s failed.\n", pfile));
755 file_unlock(lockfd,&pw_file_lock_depth);
760 if (sys_lseek(fd, pwd_seekpos, SEEK_SET) != pwd_seekpos) {
761 DEBUG(0, ("mod_smbfilepwd_entry: seek fail on file %s.\n", pfile));
762 file_unlock(lockfd,&pw_file_lock_depth);
767 if (write(fd, ascii_p16, wr_len) != wr_len) {
768 DEBUG(0, ("mod_smbfilepwd_entry: write failed in passwd file %s\n", pfile));
769 file_unlock(lockfd,&pw_file_lock_depth);
774 file_unlock(lockfd,&pw_file_lock_depth);
779 static struct smb_passdb_ops file_ops = {
784 iterate_getsmbpwnam, /* In passdb.c */
785 iterate_getsmbpwuid, /* In passdb.c */
787 add_smbfilepwd_entry,
791 struct smb_passdb_ops *file_initialise_password_db(void)
797 /* Do *NOT* make this function static. It breaks the compile on gcc. JRA */
798 void smbpass_dummy_function(void) { } /* stop some compilers complaining */
799 #endif /* USE_SMBPASS_DB */