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.
71 *************************************************************************/
72 static struct smb_passwd *getsmbfilepwent(void *vp)
74 /* Static buffers we will return. */
75 static struct smb_passwd pw_buf;
76 static pstring unix_name;
77 static unsigned char smbpwd[16];
78 static unsigned char smbntpwd[16];
86 DEBUG(0,("getsmbfilepwent: Bad password file pointer.\n"));
90 pwdb_init_smb(&pw_buf);
92 pw_buf.acct_ctrl = ACB_NORMAL;
95 * Scan the file, a line at a time.
97 while ((linebuf_len = getfileline(vp, linebuf, sizeof(linebuf))) > 0)
100 * The line we have should be of the form :-
102 * username:uid:32hex bytes:[Account type]:LCT-12345678....other flags presently
107 * username:uid:32hex bytes:32hex bytes:[Account type]:LCT-12345678....ignored....
109 * if Windows NT compatible passwords are also present.
110 * [Account type] is an ascii encoding of the type of account.
111 * LCT-(8 hex digits) is the time_t value of the last change time.
115 * As 256 is shorter than a pstring we don't need to check
116 * length here - if this ever changes....
118 p = strncpyn(unix_name, linebuf, sizeof(unix_name), ':');
125 p = Atoic( p, &uidval, ":");
127 pw_buf.unix_name = unix_name;
128 pw_buf.unix_uid = uidval;
131 * Now get the password value - this should be 32 hex digits
132 * which are the ascii representations of a 16 byte string.
133 * Get two at a time and put them into the password.
139 if (*p == '*' || *p == 'X')
141 /* Password deliberately invalid - end here. */
142 DEBUG(10, ("getsmbfilepwent: entry invalidated for unix user %s\n", unix_name));
143 pw_buf.smb_nt_passwd = NULL;
144 pw_buf.smb_passwd = NULL;
145 pw_buf.acct_ctrl |= ACB_DISABLED;
149 if (linebuf_len < (PTR_DIFF(p, linebuf) + 33))
151 DEBUG(0, ("getsmbfilepwent: malformed password entry (passwd too short)\n"));
157 DEBUG(0, ("getsmbfilepwent: malformed password entry (no terminating :)\n"));
161 if (!strncasecmp( p, "NO PASSWORD", 11))
163 pw_buf.smb_passwd = NULL;
164 pw_buf.acct_ctrl |= ACB_PWNOTREQ;
168 if (!pwdb_gethexpwd(p, (char *)smbpwd))
170 DEBUG(0, ("getsmbfilepwent: Malformed Lanman password entry (non hex chars)\n"));
173 pw_buf.smb_passwd = smbpwd;
177 * Now check if the NT compatible password is
180 pw_buf.smb_nt_passwd = NULL;
182 /* Move to the first character of the line after the lanman password. */
184 if ((linebuf_len >= (PTR_DIFF(p, linebuf) + 33)) && (p[32] == ':'))
186 if (*p != '*' && *p != 'X')
188 if(pwdb_gethexpwd(p,(char *)smbntpwd))
190 pw_buf.smb_nt_passwd = smbntpwd;
193 /* Move to the first character of the line after the NT password. */
197 DEBUG(5,("getsmbfilepwent: returning passwd entry for unix user %s, unix uid %d\n",
202 pw_buf.acct_ctrl = pwdb_decode_acct_ctrl((char*)p);
204 /* Must have some account type set. */
205 if (pw_buf.acct_ctrl == 0)
207 pw_buf.acct_ctrl = ACB_NORMAL;
210 /* Now try and get the last change time. */
218 pw_buf.pass_last_set_time = pwdb_get_last_set_time(p);
223 /* 'Old' style file. Fake up based on user name. */
225 * Currently trust accounts are kept in the same
226 * password file as 'normal accounts'. If this changes
227 * we will have to fix this code. JRA.
229 if (pw_buf.unix_name[strlen(pw_buf.unix_name) - 1] == '$')
231 pw_buf.acct_ctrl &= ~ACB_NORMAL;
232 pw_buf.acct_ctrl |= ACB_WSTRUST;
239 DEBUG(5,("getsmbfilepwent: end of file reached.\n"));
243 /************************************************************************
244 Routine to add an entry to the smbpasswd file.
245 *************************************************************************/
247 static BOOL add_smbfilepwd_entry(struct smb_passwd *newpwd)
249 char *pfile = lp_smb_passwd_file();
250 struct smb_passwd *pwd = NULL;
257 int new_entry_length;
262 /* Open the smbpassword file - for update. */
263 fp = startsmbfilepwent(True);
266 DEBUG(0, ("add_smbfilepwd_entry: unable to open file.\n"));
271 * Scan the file, a line at a time and check if the name matches.
274 while ((pwd = getsmbfilepwent(fp)) != NULL) {
275 if (strequal(newpwd->unix_name, pwd->unix_name)) {
276 DEBUG(0, ("add_smbfilepwd_entry: entry with unix name %s already exists\n", pwd->unix_name));
282 /* Ok - entry doesn't exist. We can add it */
284 /* Create a new smb passwd entry and set it to the given password. */
286 * The add user write needs to be atomic - so get the fd from
287 * the fp and do a raw write() call.
291 if((offpos = sys_lseek(fd, 0, SEEK_END)) == -1) {
292 DEBUG(0, ("add_smbfilepwd_entry(sys_lseek): Failed to add entry for user %s to file %s. \
293 Error was %s\n", newpwd->unix_name, pfile, strerror(errno)));
298 new_entry_length = strlen(newpwd->unix_name) + 1 + 15 + 1 + 32 + 1 + 32 + 1 + NEW_PW_FORMAT_SPACE_PADDED_LEN + 1 + 13 + 2;
300 if((new_entry = (char *)malloc( new_entry_length )) == NULL) {
301 DEBUG(0, ("add_smbfilepwd_entry(malloc): Failed to add entry for user %s to file %s. \
302 Error was %s\n", newpwd->unix_name, pfile, strerror(errno)));
307 slprintf(new_entry, new_entry_length - 1, "%s:%u:", newpwd->unix_name, (unsigned)newpwd->unix_uid);
308 p = &new_entry[strlen(new_entry)];
310 if(newpwd->smb_passwd != NULL) {
311 for( i = 0; i < 16; i++) {
312 slprintf((char *)&p[i*2], new_entry_length - (p - new_entry) - 1, "%02X", newpwd->smb_passwd[i]);
316 if(newpwd->acct_ctrl & ACB_PWNOTREQ)
317 safe_strcpy((char *)p, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX", new_entry_length - 1 - (p - new_entry));
319 safe_strcpy((char *)p, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", new_entry_length - 1 - (p - new_entry));
326 if(newpwd->smb_nt_passwd != NULL) {
327 for( i = 0; i < 16; i++) {
328 slprintf((char *)&p[i*2], new_entry_length - 1 - (p - new_entry), "%02X", newpwd->smb_nt_passwd[i]);
331 if(newpwd->acct_ctrl & ACB_PWNOTREQ)
332 safe_strcpy((char *)p, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX", new_entry_length - 1 - (p - new_entry));
334 safe_strcpy((char *)p, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", new_entry_length - 1 - (p - new_entry));
341 /* Add the account encoding and the last change time. */
342 slprintf((char *)p, new_entry_length - 1 - (p - new_entry), "%s:LCT-%08X:\n",
343 pwdb_encode_acct_ctrl(newpwd->acct_ctrl, NEW_PW_FORMAT_SPACE_PADDED_LEN), (uint32)time(NULL));
345 #ifdef DEBUG_PASSWORD
346 DEBUG(100, ("add_smbfilepwd_entry(%d): new_entry_len %d entry_len %d made line |%s|",
347 fd, new_entry_length, strlen(new_entry), new_entry));
350 if ((wr_len = write(fd, new_entry, strlen(new_entry))) != strlen(new_entry)) {
351 DEBUG(0, ("add_smbfilepwd_entry(write): %d Failed to add entry for user %s to file %s. \
352 Error was %s\n", wr_len, newpwd->unix_name, pfile, strerror(errno)));
354 /* Remove the entry we just wrote. */
355 if(sys_ftruncate(fd, offpos) == -1) {
356 DEBUG(0, ("add_smbfilepwd_entry: ERROR failed to ftruncate file %s. \
357 Error was %s. Password file may be corrupt ! Please examine by hand !\n",
358 newpwd->unix_name, strerror(errno)));
371 /************************************************************************
372 Routine to search the smbpasswd file for an entry matching the username.
373 and then modify its password entry. We can't use the startsmbpwent()/
374 getsmbpwent()/endsmbpwent() interfaces here as we depend on looking
375 in the actual file to decide how much room we have to write data.
376 override = False, normal
377 override = True, override XXXXXXXX'd out password or NO PASS
378 ************************************************************************/
380 static BOOL mod_smbfilepwd_entry(struct smb_passwd* pwd, BOOL override)
382 /* Static buffers we will return. */
383 static pstring unix_name;
390 unsigned char *p = NULL;
391 size_t linebuf_len = 0;
394 char *pfile = lp_smb_passwd_file();
395 BOOL found_entry = False;
396 BOOL got_pass_last_set_time = False;
398 SMB_OFF_T pwd_seekpos = 0;
405 DEBUG(0, ("No SMB password file set\n"));
408 DEBUG(10, ("mod_smbfilepwd_entry: opening file %s\n", pfile));
410 fp = sys_fopen(pfile, "r+");
413 DEBUG(0, ("mod_smbfilepwd_entry: unable to open file %s\n", pfile));
416 /* Set a buffer to do more efficient reads */
417 setvbuf(fp, readbuf, _IOFBF, sizeof(readbuf));
421 if (!file_lock(lockfd, F_WRLCK, 5, &pw_file_lock_depth)) {
422 DEBUG(0, ("mod_smbfilepwd_entry: unable to lock file %s\n", pfile));
427 /* Make sure it is only rw by the owner */
430 /* We have a write lock on the file. */
432 * Scan the file, a line at a time and check if the name matches.
435 pwd_seekpos = sys_ftell(fp);
439 fgets(linebuf, sizeof(linebuf), fp);
441 file_unlock(lockfd, &pw_file_lock_depth);
447 * Check if the string is terminated with a newline - if not
448 * then we must keep reading and discard until we get one.
450 linebuf_len = strlen(linebuf);
451 if (linebuf[linebuf_len - 1] != '\n') {
453 while (!ferror(fp) && !feof(fp)) {
460 linebuf[linebuf_len - 1] = '\0';
463 #ifdef DEBUG_PASSWORD
464 DEBUG(100, ("mod_smbfilepwd_entry: got line |%s|\n", linebuf));
467 if ((linebuf[0] == 0) && feof(fp)) {
468 DEBUG(4, ("mod_smbfilepwd_entry: end of file reached\n"));
473 * The line we have should be of the form :-
475 * username:uid:[32hex bytes]:....other flags presently
480 * username:uid:[32hex bytes]:[32hex bytes]:[attributes]:LCT-XXXXXXXX:...ignored.
482 * if Windows NT compatible passwords are also present.
485 if (linebuf[0] == '#' || linebuf[0] == '\0') {
486 DEBUG(6, ("mod_smbfilepwd_entry: skipping comment or blank line\n"));
490 p = (unsigned char *) strchr(linebuf, ':');
493 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry (no :)\n"));
498 * As 256 is shorter than a pstring we don't need to check
499 * length here - if this ever changes....
501 strncpy(unix_name, linebuf, PTR_DIFF(p, linebuf));
502 unix_name[PTR_DIFF(p, linebuf)] = '\0';
503 if (strequal(unix_name, pwd->unix_name)) {
510 file_unlock(lockfd, &pw_file_lock_depth);
515 DEBUG(6, ("mod_smbfilepwd_entry: entry exists\n"));
517 /* User name matches - get uid and password */
518 p++; /* Go past ':' */
521 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry (uid not number)\n"));
522 file_unlock(lockfd, &pw_file_lock_depth);
527 while (*p && isdigit(*p))
530 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry (no : after uid)\n"));
531 file_unlock(lockfd, &pw_file_lock_depth);
537 * Now get the password value - this should be 32 hex digits
538 * which are the ascii representations of a 16 byte string.
539 * Get two at a time and put them into the password.
543 /* Record exact password position */
544 pwd_seekpos += PTR_DIFF(p, linebuf);
546 if (!override && (*p == '*' || *p == 'X')) {
547 /* Password deliberately invalid - end here. */
548 DEBUG(10, ("mod_smbfilepwd_entry: entry invalidated for unix user %s\n", unix_name));
549 file_unlock(lockfd, &pw_file_lock_depth);
554 if (linebuf_len < (PTR_DIFF(p, linebuf) + 33)) {
555 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry (passwd too short)\n"));
556 file_unlock(lockfd,&pw_file_lock_depth);
562 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry (no terminating :)\n"));
563 file_unlock(lockfd,&pw_file_lock_depth);
568 if (!override && (*p == '*' || *p == 'X')) {
569 file_unlock(lockfd,&pw_file_lock_depth);
574 /* Now check if the NT compatible password is
576 p += 33; /* Move to the first character of the line after
577 the lanman password. */
578 if (linebuf_len < (PTR_DIFF(p, linebuf) + 33)) {
579 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry (passwd too short)\n"));
580 file_unlock(lockfd,&pw_file_lock_depth);
586 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry (no terminating :)\n"));
587 file_unlock(lockfd,&pw_file_lock_depth);
593 * Now check if the account info and the password last
594 * change time is available.
596 p += 33; /* Move to the first character of the line after
600 * If both NT and lanman passwords are provided - reset password
604 if(pwd->smb_passwd != NULL || pwd->smb_nt_passwd != NULL) {
605 /* Reqiure password in the future (should ACB_DISABLED also be reset?) */
606 pwd->acct_ctrl &= ~(ACB_PWNOTREQ);
612 encode_bits[i++] = *p++;
613 while((linebuf_len > PTR_DIFF(p, linebuf)) && (*p != ']'))
614 encode_bits[i++] = *p++;
616 encode_bits[i++] = ']';
617 encode_bits[i++] = '\0';
619 if(i == NEW_PW_FORMAT_SPACE_PADDED_LEN) {
621 * We are using a new format, space padded
622 * acct ctrl field. Encode the given acct ctrl
625 fstrcpy(encode_bits, pwdb_encode_acct_ctrl(pwd->acct_ctrl, NEW_PW_FORMAT_SPACE_PADDED_LEN));
628 * If using the old format and the ACB_DISABLED or
629 * ACB_PWNOTREQ are set then set the lanman and NT passwords to NULL
630 * here as we have no space to encode the change.
632 if(pwd->acct_ctrl & (ACB_DISABLED|ACB_PWNOTREQ)) {
633 pwd->smb_passwd = NULL;
634 pwd->smb_nt_passwd = NULL;
638 /* Go past the ']' */
639 if(linebuf_len > PTR_DIFF(p, linebuf))
642 if((linebuf_len > PTR_DIFF(p, linebuf)) && (*p == ':')) {
645 /* We should be pointing at the LCT entry. */
646 if((linebuf_len > (PTR_DIFF(p, linebuf) + 13)) && (StrnCaseCmp((char *)p, "LCT-", 4) == 0)) {
649 for(i = 0; i < 8; i++) {
650 if(p[i] == '\0' || !isxdigit(p[i]))
655 * p points at 8 characters of hex digits -
656 * read into a time_t as the seconds since
657 * 1970 that the password was last changed.
659 got_pass_last_set_time = True;
661 } /* *p && StrnCaseCmp() */
665 /* Entry is correctly formed. */
667 /* Create the 32 byte representation of the new p16 */
668 if(pwd->smb_passwd != NULL) {
669 for (i = 0; i < 16; i++) {
670 slprintf(&ascii_p16[i*2], sizeof(fstring) - 1, "%02X", (uchar) pwd->smb_passwd[i]);
673 if(pwd->acct_ctrl & ACB_PWNOTREQ)
674 fstrcpy(ascii_p16, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX");
676 fstrcpy(ascii_p16, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX");
679 /* Add on the NT md4 hash */
682 if (pwd->smb_nt_passwd != NULL) {
683 for (i = 0; i < 16; i++) {
684 slprintf(&ascii_p16[(i*2)+33], sizeof(fstring) - 1, "%02X", (uchar) pwd->smb_nt_passwd[i]);
687 if(pwd->acct_ctrl & ACB_PWNOTREQ)
688 fstrcpy(&ascii_p16[33], "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX");
690 fstrcpy(&ascii_p16[33], "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX");
693 ascii_p16[66] = '\0'; /* null-terminate the string so that strlen works */
695 /* Add on the account info bits and the time of last
698 pwd->pass_last_set_time = time(NULL);
700 if(got_pass_last_set_time) {
701 slprintf(&ascii_p16[strlen(ascii_p16)],
702 sizeof(ascii_p16)-(strlen(ascii_p16)+1),
704 encode_bits, (uint32)pwd->pass_last_set_time );
705 wr_len = strlen(ascii_p16);
708 #ifdef DEBUG_PASSWORD
709 DEBUG(100,("mod_smbfilepwd_entry: "));
710 dump_data(100, ascii_p16, wr_len);
713 if(wr_len > sizeof(linebuf)) {
714 DEBUG(0, ("mod_smbfilepwd_entry: line to write (%d) is too long.\n", wr_len+1));
715 file_unlock(lockfd,&pw_file_lock_depth);
721 * Do an atomic write into the file at the position defined by
725 /* The mod user write needs to be atomic - so get the fd from
726 the fp and do a raw write() call.
731 if (sys_lseek(fd, pwd_seekpos - 1, SEEK_SET) != pwd_seekpos - 1) {
732 DEBUG(0, ("mod_smbfilepwd_entry: seek fail on file %s.\n", pfile));
733 file_unlock(lockfd,&pw_file_lock_depth);
738 /* Sanity check - ensure the areas we are writing are framed by ':' */
739 if (read(fd, linebuf, wr_len+1) != wr_len+1) {
740 DEBUG(0, ("mod_smbfilepwd_entry: read fail on file %s.\n", pfile));
741 file_unlock(lockfd,&pw_file_lock_depth);
746 if ((linebuf[0] != ':') || (linebuf[wr_len] != ':')) {
747 DEBUG(0, ("mod_smbfilepwd_entry: check on passwd file %s failed.\n", pfile));
748 file_unlock(lockfd,&pw_file_lock_depth);
753 if (sys_lseek(fd, pwd_seekpos, SEEK_SET) != pwd_seekpos) {
754 DEBUG(0, ("mod_smbfilepwd_entry: seek fail on file %s.\n", pfile));
755 file_unlock(lockfd,&pw_file_lock_depth);
760 if (write(fd, ascii_p16, wr_len) != wr_len) {
761 DEBUG(0, ("mod_smbfilepwd_entry: write failed in passwd file %s\n", pfile));
762 file_unlock(lockfd,&pw_file_lock_depth);
767 file_unlock(lockfd,&pw_file_lock_depth);
772 static struct smb_passdb_ops file_ops = {
777 iterate_getsmbpwnam, /* In passdb.c */
778 iterate_getsmbpwuid, /* In passdb.c */
780 add_smbfilepwd_entry,
784 struct smb_passdb_ops *file_initialise_password_db(void)
790 /* Do *NOT* make this function static. It breaks the compile on gcc. JRA */
791 void smbpass_dummy_function(void) { } /* stop some compilers complaining */
792 #endif /* USE_SMBPASS_DB */