s3-libads: use ldap_init_fd() to initialize a ldap session if possible
[bbaumbach/samba-autobuild/.git] / source3 / passdb / pdb_smbpasswd.c
1 /*
2  * Unix SMB/CIFS implementation. 
3  * SMB parameters and setup
4  * Copyright (C) Andrew Tridgell       1992-1998 
5  * Modified by Jeremy Allison          1995.
6  * Modified by Gerald (Jerry) Carter   2000-2001,2003
7  * Modified by Andrew Bartlett         2002.
8  * 
9  * This program is free software; you can redistribute it and/or modify it under
10  * the terms of the GNU General Public License as published by the Free
11  * Software Foundation; either version 3 of the License, or (at your option)
12  * any later version.
13  * 
14  * This program is distributed in the hope that it will be useful, but WITHOUT
15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
17  * more details.
18  * 
19  * You should have received a copy of the GNU General Public License along with
20  * this program; if not, see <http://www.gnu.org/licenses/>.
21  */
22
23 #include "includes.h"
24 #include "passdb.h"
25 #include "system/passwd.h"
26 #include "system/filesys.h"
27 #include "../librpc/gen_ndr/samr.h"
28 #include "../libcli/security/security.h"
29 #include "passdb/pdb_smbpasswd.h"
30
31 #undef DBGC_CLASS
32 #define DBGC_CLASS DBGC_PASSDB
33
34 /* 
35    smb_passwd is analogous to sam_passwd used everywhere
36    else.  However, smb_passwd is limited to the information
37    stored by an smbpasswd entry 
38  */
39
40 struct smb_passwd
41 {
42         uint32_t smb_userid;      /* this is actually the unix uid_t */
43         const char *smb_name;     /* username string */
44
45         const unsigned char *smb_passwd;    /* Null if no password */
46         const unsigned char *smb_nt_passwd; /* Null if no password */
47
48         uint16_t acct_ctrl;             /* account info (ACB_xxxx bit-mask) */
49         time_t pass_last_set_time;    /* password last set time */
50 };
51
52 struct smbpasswd_privates
53 {
54         /* used for maintain locks on the smbpasswd file */
55         int     pw_file_lock_depth;
56
57         /* Global File pointer */
58         FILE    *pw_file;
59
60         /* formerly static variables */
61         struct smb_passwd pw_buf;
62         fstring user_name;
63         unsigned char smbpwd[16];
64         unsigned char smbntpwd[16];
65
66         /* retrieve-once info */
67         const char *smbpasswd_file;
68 };
69
70 enum pwf_access_type { PWF_READ, PWF_UPDATE, PWF_CREATE };
71
72 static SIG_ATOMIC_T gotalarm;
73
74 /***************************************************************
75  Signal function to tell us we timed out.
76 ****************************************************************/
77
78 static void gotalarm_sig(int signum)
79 {
80         gotalarm = 1;
81 }
82
83 /***************************************************************
84  Lock or unlock a fd for a known lock type. Abandon after waitsecs 
85  seconds.
86 ****************************************************************/
87
88 static bool do_file_lock(int fd, int waitsecs, int type)
89 {
90         struct flock lock;
91         int             ret;
92         void (*oldsig_handler)(int);
93
94         gotalarm = 0;
95         oldsig_handler = CatchSignal(SIGALRM, gotalarm_sig);
96
97         lock.l_type = type;
98         lock.l_whence = SEEK_SET;
99         lock.l_start = 0;
100         lock.l_len = 1;
101         lock.l_pid = 0;
102
103         alarm(waitsecs);
104         /* Note we must *NOT* use sys_fcntl here ! JRA */
105         ret = fcntl(fd, F_SETLKW, &lock);
106         alarm(0);
107         CatchSignal(SIGALRM, oldsig_handler);
108
109         if (gotalarm && ret == -1) {
110                 DEBUG(0, ("do_file_lock: failed to %s file.\n",
111                         type == F_UNLCK ? "unlock" : "lock"));
112                 return False;
113         }
114
115         return (ret == 0);
116 }
117
118 /***************************************************************
119  Lock an fd. Abandon after waitsecs seconds.
120 ****************************************************************/
121
122 static bool pw_file_lock(int fd, int type, int secs, int *plock_depth)
123 {
124         if (fd < 0) {
125                 return False;
126         }
127
128         if(*plock_depth == 0) {
129                 if (!do_file_lock(fd, secs, type)) {
130                         DEBUG(10,("pw_file_lock: locking file failed, error = %s.\n",
131                                 strerror(errno)));
132                         return False;
133                 }
134         }
135
136         (*plock_depth)++;
137
138         return True;
139 }
140
141 /***************************************************************
142  Unlock an fd. Abandon after waitsecs seconds.
143 ****************************************************************/
144
145 static bool pw_file_unlock(int fd, int *plock_depth)
146 {
147         bool ret=True;
148
149         if (fd == 0 || *plock_depth == 0) {
150                 return True;
151         }
152
153         if(*plock_depth == 1) {
154                 ret = do_file_lock(fd, 5, F_UNLCK);
155         }
156
157         if (*plock_depth > 0) {
158                 (*plock_depth)--;
159         }
160
161         if(!ret) {
162                 DEBUG(10,("pw_file_unlock: unlocking file failed, error = %s.\n",
163                         strerror(errno)));
164         }
165         return ret;
166 }
167
168 /**************************************************************
169  Intialize a smb_passwd struct
170  *************************************************************/
171
172 static void pdb_init_smb(struct smb_passwd *user)
173 {
174         if (user == NULL) 
175                 return;
176         ZERO_STRUCTP (user);
177
178         user->pass_last_set_time = (time_t)0;
179 }
180
181 /***************************************************************
182  Internal fn to enumerate the smbpasswd list. Returns a void pointer
183  to ensure no modification outside this module. Checks for atomic
184  rename of smbpasswd file on update or create once the lock has
185  been granted to prevent race conditions. JRA.
186 ****************************************************************/
187
188 static FILE *startsmbfilepwent(const char *pfile, enum pwf_access_type type, int *lock_depth)
189 {
190         FILE *fp = NULL;
191         const char *open_mode = NULL;
192         int race_loop = 0;
193         int lock_type = F_RDLCK;
194
195         if (!*pfile) {
196                 DEBUG(0, ("startsmbfilepwent: No SMB password file set\n"));
197                 return (NULL);
198         }
199
200         switch(type) {
201                 case PWF_READ:
202                         open_mode = "rb";
203                         lock_type = F_RDLCK;
204                         break;
205                 case PWF_UPDATE:
206                         open_mode = "r+b";
207                         lock_type = F_WRLCK;
208                         break;
209                 case PWF_CREATE:
210                         /*
211                          * Ensure atomic file creation.
212                          */
213                         {
214                                 int i, fd = -1;
215
216                                 for(i = 0; i < 5; i++) {
217                                         if((fd = open(pfile, O_CREAT|O_TRUNC|O_EXCL|O_RDWR, 0600))!=-1) {
218                                                 break;
219                                         }
220                                         usleep(200); /* Spin, spin... */
221                                 }
222                                 if(fd == -1) {
223                                         DEBUG(0,("startsmbfilepwent_internal: too many race conditions \
224 creating file %s\n", pfile));
225                                         return NULL;
226                                 }
227                                 close(fd);
228                                 open_mode = "r+b";
229                                 lock_type = F_WRLCK;
230                                 break;
231                         }
232                 default:
233                         DEBUG(10, ("Invalid open mode: %d\n", type));
234                         return NULL;
235         }
236
237         for(race_loop = 0; race_loop < 5; race_loop++) {
238                 DEBUG(10, ("startsmbfilepwent_internal: opening file %s\n", pfile));
239
240                 if((fp = fopen(pfile, open_mode)) == NULL) {
241
242                         /*
243                          * If smbpasswd file doesn't exist, then create new one. This helps to avoid
244                          * confusing error msg when adding user account first time.
245                          */
246                         if (errno == ENOENT) {
247                                 if ((fp = fopen(pfile, "a+")) != NULL) {
248                                         DEBUG(0, ("startsmbfilepwent_internal: file %s did not \
249 exist. File successfully created.\n", pfile));
250                                 } else {
251                                         DEBUG(0, ("startsmbfilepwent_internal: file %s did not \
252 exist. Couldn't create new one. Error was: %s",
253                                         pfile, strerror(errno)));
254                                         return NULL;
255                                 }
256                         } else {
257                                 DEBUG(0, ("startsmbfilepwent_internal: unable to open file %s. \
258 Error was: %s\n", pfile, strerror(errno)));
259                                 return NULL;
260                         }
261                 }
262
263                 if (!pw_file_lock(fileno(fp), lock_type, 5, lock_depth)) {
264                         DEBUG(0, ("startsmbfilepwent_internal: unable to lock file %s. \
265 Error was %s\n", pfile, strerror(errno) ));
266                         fclose(fp);
267                         return NULL;
268                 }
269
270                 /*
271                  * Only check for replacement races on update or create.
272                  * For read we don't mind if the data is one record out of date.
273                  */
274
275                 if(type == PWF_READ) {
276                         break;
277                 } else {
278                         SMB_STRUCT_STAT sbuf1, sbuf2;
279
280                         /*
281                          * Avoid the potential race condition between the open and the lock
282                          * by doing a stat on the filename and an fstat on the fd. If the
283                          * two inodes differ then someone did a rename between the open and
284                          * the lock. Back off and try the open again. Only do this 5 times to
285                          * prevent infinate loops. JRA.
286                          */
287
288                         if (sys_stat(pfile, &sbuf1, false) != 0) {
289                                 DEBUG(0, ("startsmbfilepwent_internal: unable to stat file %s. \
290 Error was %s\n", pfile, strerror(errno)));
291                                 pw_file_unlock(fileno(fp), lock_depth);
292                                 fclose(fp);
293                                 return NULL;
294                         }
295
296                         if (sys_fstat(fileno(fp), &sbuf2, false) != 0) {
297                                 DEBUG(0, ("startsmbfilepwent_internal: unable to fstat file %s. \
298 Error was %s\n", pfile, strerror(errno)));
299                                 pw_file_unlock(fileno(fp), lock_depth);
300                                 fclose(fp);
301                                 return NULL;
302                         }
303
304                         if( sbuf1.st_ex_ino == sbuf2.st_ex_ino) {
305                                 /* No race. */
306                                 break;
307                         }
308
309                         /*
310                          * Race occurred - back off and try again...
311                          */
312
313                         pw_file_unlock(fileno(fp), lock_depth);
314                         fclose(fp);
315                 }
316         }
317
318         if(race_loop == 5) {
319                 DEBUG(0, ("startsmbfilepwent_internal: too many race conditions opening file %s\n", pfile));
320                 return NULL;
321         }
322
323         /* Set a buffer to do more efficient reads */
324         setvbuf(fp, (char *)NULL, _IOFBF, 1024);
325
326         /* Make sure it is only rw by the owner */
327 #ifdef HAVE_FCHMOD
328         if(fchmod(fileno(fp), S_IRUSR|S_IWUSR) == -1) {
329 #else
330         if(chmod(pfile, S_IRUSR|S_IWUSR) == -1) {
331 #endif
332                 DEBUG(0, ("startsmbfilepwent_internal: failed to set 0600 permissions on password file %s. \
333 Error was %s\n.", pfile, strerror(errno) ));
334                 pw_file_unlock(fileno(fp), lock_depth);
335                 fclose(fp);
336                 return NULL;
337         }
338
339         /* We have a lock on the file. */
340         return fp;
341 }
342
343 /***************************************************************
344  End enumeration of the smbpasswd list.
345 ****************************************************************/
346
347 static void endsmbfilepwent(FILE *fp, int *lock_depth)
348 {
349         if (!fp) {
350                 return;
351         }
352
353         pw_file_unlock(fileno(fp), lock_depth);
354         fclose(fp);
355         DEBUG(7, ("endsmbfilepwent_internal: closed password file.\n"));
356 }
357
358 /*************************************************************************
359  Routine to return the next entry in the smbpasswd list.
360  *************************************************************************/
361
362 static struct smb_passwd *getsmbfilepwent(struct smbpasswd_privates *smbpasswd_state, FILE *fp)
363 {
364         /* Static buffers we will return. */
365         struct smb_passwd *pw_buf = &smbpasswd_state->pw_buf;
366         char  *user_name = smbpasswd_state->user_name;
367         unsigned char *smbpwd = smbpasswd_state->smbpwd;
368         unsigned char *smbntpwd = smbpasswd_state->smbntpwd;
369         char linebuf[256];
370         unsigned char *p;
371         long uidval;
372         size_t linebuf_len;
373         char *status;
374
375         if(fp == NULL) {
376                 DEBUG(0,("getsmbfilepwent: Bad password file pointer.\n"));
377                 return NULL;
378         }
379
380         pdb_init_smb(pw_buf);
381         pw_buf->acct_ctrl = ACB_NORMAL;  
382
383         /*
384          * Scan the file, a line at a time and check if the name matches.
385          */
386         status = linebuf;
387         while (status && !feof(fp)) {
388                 linebuf[0] = '\0';
389
390                 status = fgets(linebuf, 256, fp);
391                 if (status == NULL && ferror(fp)) {
392                         return NULL;
393                 }
394
395                 /*
396                  * Check if the string is terminated with a newline - if not
397                  * then we must keep reading and discard until we get one.
398                  */
399                 if ((linebuf_len = strlen(linebuf)) == 0) {
400                         continue;
401                 }
402
403                 if (linebuf[linebuf_len - 1] != '\n') {
404                         while (!ferror(fp) && !feof(fp)) {
405                                 int c;
406                                 c = fgetc(fp);
407                                 if (c == '\n') {
408                                         break;
409                                 }
410                         }
411                 } else {
412                         linebuf[linebuf_len - 1] = '\0';
413                 }
414
415 #ifdef DEBUG_PASSWORD
416                 DEBUG(100, ("getsmbfilepwent: got line |%s|\n", linebuf));
417 #endif
418                 if ((linebuf[0] == 0) && feof(fp)) {
419                         DEBUG(4, ("getsmbfilepwent: end of file reached\n"));
420                         break;
421                 }
422
423                 /*
424                  * The line we have should be of the form :-
425                  * 
426                  * username:uid:32hex bytes:[Account type]:LCT-12345678....other flags presently
427                  * ignored....
428                  * 
429                  * or,
430                  *
431                  * username:uid:32hex bytes:32hex bytes:[Account type]:LCT-12345678....ignored....
432                  *
433                  * if Windows NT compatible passwords are also present.
434                  * [Account type] is an ascii encoding of the type of account.
435                  * LCT-(8 hex digits) is the time_t value of the last change time.
436                  */
437
438                 if (linebuf[0] == '#' || linebuf[0] == '\0') {
439                         DEBUG(6, ("getsmbfilepwent: skipping comment or blank line\n"));
440                         continue;
441                 }
442                 p = (unsigned char *) strchr_m(linebuf, ':');
443                 if (p == NULL) {
444                         DEBUG(0, ("getsmbfilepwent: malformed password entry (no :)\n"));
445                         continue;
446                 }
447
448                 strncpy(user_name, linebuf, PTR_DIFF(p, linebuf));
449                 user_name[PTR_DIFF(p, linebuf)] = '\0';
450
451                 /* Get smb uid. */
452
453                 p++; /* Go past ':' */
454
455                 if(*p == '-') {
456                         DEBUG(0, ("getsmbfilepwent: user name %s has a negative uid.\n", user_name));
457                         continue;
458                 }
459
460                 if (!isdigit(*p)) {
461                         DEBUG(0, ("getsmbfilepwent: malformed password entry for user %s (uid not number)\n",
462                                 user_name));
463                         continue;
464                 }
465
466                 uidval = atoi((char *) p);
467
468                 while (*p && isdigit(*p)) {
469                         p++;
470                 }
471
472                 if (*p != ':') {
473                         DEBUG(0, ("getsmbfilepwent: malformed password entry for user %s (no : after uid)\n",
474                                 user_name));
475                         continue;
476                 }
477
478                 pw_buf->smb_name = user_name;
479                 pw_buf->smb_userid = uidval;
480
481                 /*
482                  * Now get the password value - this should be 32 hex digits
483                  * which are the ascii representations of a 16 byte string.
484                  * Get two at a time and put them into the password.
485                  */
486
487                 /* Skip the ':' */
488                 p++;
489
490                 if (linebuf_len < (PTR_DIFF(p, linebuf) + 33)) {
491                         DEBUG(0, ("getsmbfilepwent: malformed password entry for user %s (passwd too short)\n",
492                                 user_name ));
493                         continue;
494                 }
495
496                 if (p[32] != ':') {
497                         DEBUG(0, ("getsmbfilepwent: malformed password entry for user %s (no terminating :)\n",
498                                 user_name));
499                         continue;
500                 }
501
502                 if (strnequal((char *) p, "NO PASSWORD", 11)) {
503                         pw_buf->smb_passwd = NULL;
504                         pw_buf->acct_ctrl |= ACB_PWNOTREQ;
505                 } else {
506                         if (*p == '*' || *p == 'X') {
507                                 /* NULL LM password */
508                                 pw_buf->smb_passwd = NULL;
509                                 DEBUG(10, ("getsmbfilepwent: LM password for user %s invalidated\n", user_name));
510                         } else if (pdb_gethexpwd((char *)p, smbpwd)) {
511                                 pw_buf->smb_passwd = smbpwd;
512                         } else {
513                                 pw_buf->smb_passwd = NULL;
514                                 DEBUG(0, ("getsmbfilepwent: Malformed Lanman password entry for user %s \
515 (non hex chars)\n", user_name));
516                         }
517                 }
518
519                 /* 
520                  * Now check if the NT compatible password is
521                  * available.
522                  */
523                 pw_buf->smb_nt_passwd = NULL;
524                 p += 33; /* Move to the first character of the line after the lanman password. */
525                 if ((linebuf_len >= (PTR_DIFF(p, linebuf) + 33)) && (p[32] == ':')) {
526                         if (*p != '*' && *p != 'X') {
527                                 if(pdb_gethexpwd((char *)p,smbntpwd)) {
528                                         pw_buf->smb_nt_passwd = smbntpwd;
529                                 }
530                         }
531                         p += 33; /* Move to the first character of the line after the NT password. */
532                 }
533
534                 DEBUG(5,("getsmbfilepwent: returning passwd entry for user %s, uid %ld\n",
535                         user_name, uidval));
536
537                 if (*p == '[') {
538                         unsigned char *end_p = (unsigned char *)strchr_m((char *)p, ']');
539                         pw_buf->acct_ctrl = pdb_decode_acct_ctrl((char*)p);
540
541                         /* Must have some account type set. */
542                         if(pw_buf->acct_ctrl == 0) {
543                                 pw_buf->acct_ctrl = ACB_NORMAL;
544                         }
545
546                         /* Now try and get the last change time. */
547                         if(end_p) {
548                                 p = end_p + 1;
549                         }
550                         if(*p == ':') {
551                                 p++;
552                                 if(*p && (strncasecmp_m((char *)p, "LCT-", 4)==0)) {
553                                         int i;
554                                         p += 4;
555                                         for(i = 0; i < 8; i++) {
556                                                 if(p[i] == '\0' || !isxdigit(p[i])) {
557                                                         break;
558                                                 }
559                                         }
560                                         if(i == 8) {
561                                                 /*
562                                                  * p points at 8 characters of hex digits - 
563                                                  * read into a time_t as the seconds since
564                                                  * 1970 that the password was last changed.
565                                                  */
566                                                 pw_buf->pass_last_set_time = (time_t)strtol((char *)p, NULL, 16);
567                                         }
568                                 }
569                         }
570                 } else {
571                         /* 'Old' style file. Fake up based on user name. */
572                         /*
573                          * Currently trust accounts are kept in the same
574                          * password file as 'normal accounts'. If this changes
575                          * we will have to fix this code. JRA.
576                          */
577                         if(pw_buf->smb_name[strlen(pw_buf->smb_name) - 1] == '$') {
578                                 pw_buf->acct_ctrl &= ~ACB_NORMAL;
579                                 pw_buf->acct_ctrl |= ACB_WSTRUST;
580                         }
581                 }
582
583                 return pw_buf;
584         }
585
586         DEBUG(5,("getsmbfilepwent: end of file reached.\n"));
587         return NULL;
588 }
589
590 /************************************************************************
591  Create a new smbpasswd entry - malloced space returned.
592 *************************************************************************/
593
594 static char *format_new_smbpasswd_entry(const struct smb_passwd *newpwd)
595 {
596         int new_entry_length;
597         char *new_entry;
598         char *p;
599
600         new_entry_length = strlen(newpwd->smb_name) + 1 + 15 + 1 + 32 + 1 + 32 + 1 + 
601                                 NEW_PW_FORMAT_SPACE_PADDED_LEN + 1 + 13 + 2;
602
603         if((new_entry = (char *)SMB_MALLOC( new_entry_length )) == NULL) {
604                 DEBUG(0, ("format_new_smbpasswd_entry: Malloc failed adding entry for user %s.\n",
605                         newpwd->smb_name ));
606                 return NULL;
607         }
608
609         slprintf(new_entry, new_entry_length - 1, "%s:%u:", newpwd->smb_name, (unsigned)newpwd->smb_userid);
610
611         p = new_entry+strlen(new_entry);
612         pdb_sethexpwd(p, newpwd->smb_passwd, newpwd->acct_ctrl);
613         p+=strlen(p);
614         *p = ':';
615         p++;
616
617         pdb_sethexpwd(p, newpwd->smb_nt_passwd, newpwd->acct_ctrl);
618         p+=strlen(p);
619         *p = ':';
620         p++;
621
622         /* Add the account encoding and the last change time. */
623         slprintf((char *)p, new_entry_length - 1 - (p - new_entry),  "%s:LCT-%08X:\n",
624                 pdb_encode_acct_ctrl(newpwd->acct_ctrl, NEW_PW_FORMAT_SPACE_PADDED_LEN),
625                 (uint32_t)newpwd->pass_last_set_time);
626
627         return new_entry;
628 }
629
630 /************************************************************************
631  Routine to add an entry to the smbpasswd file.
632 *************************************************************************/
633
634 static NTSTATUS add_smbfilepwd_entry(struct smbpasswd_privates *smbpasswd_state,
635                                      struct smb_passwd *newpwd)
636 {
637         const char *pfile = smbpasswd_state->smbpasswd_file;
638         struct smb_passwd *pwd = NULL;
639         FILE *fp = NULL;
640         int wr_len;
641         int fd;
642         size_t new_entry_length;
643         char *new_entry;
644         off_t offpos;
645  
646         /* Open the smbpassword file - for update. */
647         fp = startsmbfilepwent(pfile, PWF_UPDATE, &smbpasswd_state->pw_file_lock_depth);
648
649         if (fp == NULL && errno == ENOENT) {
650                 /* Try again - create. */
651                 fp = startsmbfilepwent(pfile, PWF_CREATE, &smbpasswd_state->pw_file_lock_depth);
652         }
653
654         if (fp == NULL) {
655                 DEBUG(0, ("add_smbfilepwd_entry: unable to open file.\n"));
656                 return map_nt_error_from_unix(errno);
657         }
658
659         /*
660          * Scan the file, a line at a time and check if the name matches.
661          */
662
663         while ((pwd = getsmbfilepwent(smbpasswd_state, fp)) != NULL) {
664                 if (strequal(newpwd->smb_name, pwd->smb_name)) {
665                         DEBUG(0, ("add_smbfilepwd_entry: entry with name %s already exists\n", pwd->smb_name));
666                         endsmbfilepwent(fp, &smbpasswd_state->pw_file_lock_depth);
667                         return NT_STATUS_USER_EXISTS;
668                 }
669         }
670
671         /* Ok - entry doesn't exist. We can add it */
672
673         /* Create a new smb passwd entry and set it to the given password. */
674         /* 
675          * The add user write needs to be atomic - so get the fd from 
676          * the fp and do a raw write() call.
677          */
678         fd = fileno(fp);
679
680         if((offpos = lseek(fd, 0, SEEK_END)) == -1) {
681                 NTSTATUS result = map_nt_error_from_unix(errno);
682                 DEBUG(0, ("add_smbfilepwd_entry(lseek): Failed to add entry for user %s to file %s. \
683 Error was %s\n", newpwd->smb_name, pfile, strerror(errno)));
684                 endsmbfilepwent(fp, &smbpasswd_state->pw_file_lock_depth);
685                 return result;
686         }
687
688         if((new_entry = format_new_smbpasswd_entry(newpwd)) == NULL) {
689                 DEBUG(0, ("add_smbfilepwd_entry(malloc): Failed to add entry for user %s to file %s. \
690 Error was %s\n", newpwd->smb_name, pfile, strerror(errno)));
691                 endsmbfilepwent(fp, &smbpasswd_state->pw_file_lock_depth);
692                 return NT_STATUS_NO_MEMORY;
693         }
694
695         new_entry_length = strlen(new_entry);
696
697 #ifdef DEBUG_PASSWORD
698         DEBUG(100, ("add_smbfilepwd_entry(%d): new_entry_len %d made line |%s|", 
699                         fd, (int)new_entry_length, new_entry));
700 #endif
701
702         if ((wr_len = write(fd, new_entry, new_entry_length)) != new_entry_length) {
703                 NTSTATUS result = map_nt_error_from_unix(errno);
704                 DEBUG(0, ("add_smbfilepwd_entry(write): %d Failed to add entry for user %s to file %s. \
705 Error was %s\n", wr_len, newpwd->smb_name, pfile, strerror(errno)));
706
707                 /* Remove the entry we just wrote. */
708                 if(ftruncate(fd, offpos) == -1) {
709                         DEBUG(0, ("add_smbfilepwd_entry: ERROR failed to ftruncate file %s. \
710 Error was %s. Password file may be corrupt ! Please examine by hand !\n", 
711                                 newpwd->smb_name, strerror(errno)));
712                 }
713
714                 endsmbfilepwent(fp, &smbpasswd_state->pw_file_lock_depth);
715                 free(new_entry);
716                 return result;
717         }
718
719         free(new_entry);
720         endsmbfilepwent(fp, &smbpasswd_state->pw_file_lock_depth);
721         return NT_STATUS_OK;
722 }
723
724 /************************************************************************
725  Routine to search the smbpasswd file for an entry matching the username.
726  and then modify its password entry. We can't use the startsmbpwent()/
727  getsmbpwent()/endsmbpwent() interfaces here as we depend on looking
728  in the actual file to decide how much room we have to write data.
729  override = False, normal
730  override = True, override XXXXXXXX'd out password or NO PASS
731 ************************************************************************/
732
733 static bool mod_smbfilepwd_entry(struct smbpasswd_privates *smbpasswd_state, const struct smb_passwd* pwd)
734 {
735         /* Static buffers we will return. */
736         fstring user_name;
737
738         char *status;
739 #define LINEBUF_SIZE 255
740         char linebuf[LINEBUF_SIZE + 1];
741         char readbuf[1024];
742         char ascii_p16[FSTRING_LEN + 20];
743         fstring encode_bits;
744         unsigned char *p = NULL;
745         size_t linebuf_len = 0;
746         FILE *fp;
747         int lockfd;
748         const char *pfile = smbpasswd_state->smbpasswd_file;
749         bool found_entry = False;
750         bool got_pass_last_set_time = False;
751
752         off_t pwd_seekpos = 0;
753
754         int i;
755         int wr_len;
756         int fd;
757
758         if (!*pfile) {
759                 DEBUG(0, ("No SMB password file set\n"));
760                 return False;
761         }
762         DEBUG(10, ("mod_smbfilepwd_entry: opening file %s\n", pfile));
763
764         fp = fopen(pfile, "r+");
765
766         if (fp == NULL) {
767                 DEBUG(0, ("mod_smbfilepwd_entry: unable to open file %s\n", pfile));
768                 return False;
769         }
770         /* Set a buffer to do more efficient reads */
771         setvbuf(fp, readbuf, _IOFBF, sizeof(readbuf));
772
773         lockfd = fileno(fp);
774
775         if (!pw_file_lock(lockfd, F_WRLCK, 5, &smbpasswd_state->pw_file_lock_depth)) {
776                 DEBUG(0, ("mod_smbfilepwd_entry: unable to lock file %s\n", pfile));
777                 fclose(fp);
778                 return False;
779         }
780
781         /* Make sure it is only rw by the owner */
782         chmod(pfile, 0600);
783
784         /* We have a write lock on the file. */
785         /*
786          * Scan the file, a line at a time and check if the name matches.
787          */
788         status = linebuf;
789         while (status && !feof(fp)) {
790                 pwd_seekpos = ftell(fp);
791
792                 linebuf[0] = '\0';
793
794                 status = fgets(linebuf, LINEBUF_SIZE, fp);
795                 if (status == NULL && ferror(fp)) {
796                         pw_file_unlock(lockfd, &smbpasswd_state->pw_file_lock_depth);
797                         fclose(fp);
798                         return False;
799                 }
800
801                 /*
802                  * Check if the string is terminated with a newline - if not
803                  * then we must keep reading and discard until we get one.
804                  */
805                 linebuf_len = strlen(linebuf);
806                 if (linebuf[linebuf_len - 1] != '\n') {
807                         while (!ferror(fp) && !feof(fp)) {
808                                 int c;
809                                 c = fgetc(fp);
810                                 if (c == '\n') {
811                                         break;
812                                 }
813                         }
814                 } else {
815                         linebuf[linebuf_len - 1] = '\0';
816                 }
817
818 #ifdef DEBUG_PASSWORD
819                 DEBUG(100, ("mod_smbfilepwd_entry: got line |%s|\n", linebuf));
820 #endif
821
822                 if ((linebuf[0] == 0) && feof(fp)) {
823                         DEBUG(4, ("mod_smbfilepwd_entry: end of file reached\n"));
824                         break;
825                 }
826
827                 /*
828                  * The line we have should be of the form :-
829                  * 
830                  * username:uid:[32hex bytes]:....other flags presently
831                  * ignored....
832                  * 
833                  * or,
834                  *
835                  * username:uid:[32hex bytes]:[32hex bytes]:[attributes]:LCT-XXXXXXXX:...ignored.
836                  *
837                  * if Windows NT compatible passwords are also present.
838                  */
839
840                 if (linebuf[0] == '#' || linebuf[0] == '\0') {
841                         DEBUG(6, ("mod_smbfilepwd_entry: skipping comment or blank line\n"));
842                         continue;
843                 }
844
845                 p = (unsigned char *) strchr_m(linebuf, ':');
846
847                 if (p == NULL) {
848                         DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry (no :)\n"));
849                         continue;
850                 }
851
852                 strncpy(user_name, linebuf, PTR_DIFF(p, linebuf));
853                 user_name[PTR_DIFF(p, linebuf)] = '\0';
854                 if (strequal(user_name, pwd->smb_name)) {
855                         found_entry = True;
856                         break;
857                 }
858         }
859
860         if (!found_entry) {
861                 pw_file_unlock(lockfd, &smbpasswd_state->pw_file_lock_depth);
862                 fclose(fp);
863
864                 DEBUG(2, ("Cannot update entry for user %s, as they don't exist in the smbpasswd file!\n",
865                         pwd->smb_name));
866                 return False;
867         }
868
869         DEBUG(6, ("mod_smbfilepwd_entry: entry exists for user %s\n", pwd->smb_name));
870
871         /* User name matches - get uid and password */
872         p++; /* Go past ':' */
873
874         if (!isdigit(*p)) {
875                 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry for user %s (uid not number)\n",
876                         pwd->smb_name));
877                 pw_file_unlock(lockfd, &smbpasswd_state->pw_file_lock_depth);
878                 fclose(fp);
879                 return False;
880         }
881
882         while (*p && isdigit(*p)) {
883                 p++;
884         }
885         if (*p != ':') {
886                 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry for user %s (no : after uid)\n",
887                         pwd->smb_name));
888                 pw_file_unlock(lockfd, &smbpasswd_state->pw_file_lock_depth);
889                 fclose(fp);
890                 return False;
891         }
892
893         /*
894          * Now get the password value - this should be 32 hex digits
895          * which are the ascii representations of a 16 byte string.
896          * Get two at a time and put them into the password.
897          */
898         p++;
899
900         /* Record exact password position */
901         pwd_seekpos += PTR_DIFF(p, linebuf);
902
903         if (linebuf_len < (PTR_DIFF(p, linebuf) + 33)) {
904                 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry for user %s (passwd too short)\n",
905                         pwd->smb_name));
906                 pw_file_unlock(lockfd,&smbpasswd_state->pw_file_lock_depth);
907                 fclose(fp);
908                 return (False);
909         }
910
911         if (p[32] != ':') {
912                 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry for user %s (no terminating :)\n",
913                         pwd->smb_name));
914                 pw_file_unlock(lockfd,&smbpasswd_state->pw_file_lock_depth);
915                 fclose(fp);
916                 return False;
917         }
918
919         /* Now check if the NT compatible password is available. */
920         p += 33; /* Move to the first character of the line after the lanman password. */
921         if (linebuf_len < (PTR_DIFF(p, linebuf) + 33)) {
922                 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry for user %s (passwd too short)\n",
923                         pwd->smb_name));
924                 pw_file_unlock(lockfd,&smbpasswd_state->pw_file_lock_depth);
925                 fclose(fp);
926                 return (False);
927         }
928
929         if (p[32] != ':') {
930                 DEBUG(0, ("mod_smbfilepwd_entry: malformed password entry for user %s (no terminating :)\n",
931                         pwd->smb_name));
932                 pw_file_unlock(lockfd,&smbpasswd_state->pw_file_lock_depth);
933                 fclose(fp);
934                 return False;
935         }
936
937         /* 
938          * Now check if the account info and the password last
939          * change time is available.
940          */
941         p += 33; /* Move to the first character of the line after the NT password. */
942
943         if (*p == '[') {
944                 i = 0;
945                 encode_bits[i++] = *p++;
946                 while((linebuf_len > PTR_DIFF(p, linebuf)) && (*p != ']')) {
947                         encode_bits[i++] = *p++;
948                 }
949
950                 encode_bits[i++] = ']';
951                 encode_bits[i++] = '\0';
952
953                 if(i == NEW_PW_FORMAT_SPACE_PADDED_LEN) {
954                         /*
955                          * We are using a new format, space padded
956                          * acct ctrl field. Encode the given acct ctrl
957                          * bits into it.
958                          */
959                         fstrcpy(encode_bits, pdb_encode_acct_ctrl(pwd->acct_ctrl, NEW_PW_FORMAT_SPACE_PADDED_LEN));
960                 } else {
961                         DEBUG(0,("mod_smbfilepwd_entry:  Using old smbpasswd format for user %s. \
962 This is no longer supported.!\n", pwd->smb_name));
963                         DEBUG(0,("mod_smbfilepwd_entry:  No changes made, failing.!\n"));
964                         pw_file_unlock(lockfd, &smbpasswd_state->pw_file_lock_depth);
965                         fclose(fp);
966                         return False;
967                 }
968
969                 /* Go past the ']' */
970                 if(linebuf_len > PTR_DIFF(p, linebuf)) {
971                         p++;
972                 }
973
974                 if((linebuf_len > PTR_DIFF(p, linebuf)) && (*p == ':')) {
975                         p++;
976
977                         /* We should be pointing at the LCT entry. */
978                         if((linebuf_len > (PTR_DIFF(p, linebuf) + 13)) && (strncasecmp_m((char *)p, "LCT-", 4) == 0)) {
979                                 p += 4;
980                                 for(i = 0; i < 8; i++) {
981                                         if(p[i] == '\0' || !isxdigit(p[i])) {
982                                                 break;
983                                         }
984                                 }
985                                 if(i == 8) {
986                                         /*
987                                          * p points at 8 characters of hex digits -
988                                          * read into a time_t as the seconds since
989                                          * 1970 that the password was last changed.
990                                          */
991                                         got_pass_last_set_time = True;
992                                 } /* i == 8 */
993                         } /* *p && strncasecmp_m() */
994                 } /* p == ':' */
995         } /* p == '[' */
996
997         /* Entry is correctly formed. */
998
999         /* Create the 32 byte representation of the new p16 */
1000         pdb_sethexpwd(ascii_p16, pwd->smb_passwd, pwd->acct_ctrl);
1001
1002         /* Add on the NT md4 hash */
1003         ascii_p16[32] = ':';
1004         wr_len = 66;
1005         pdb_sethexpwd(ascii_p16+33, pwd->smb_nt_passwd, pwd->acct_ctrl);
1006         ascii_p16[65] = ':';
1007         ascii_p16[66] = '\0'; /* null-terminate the string so that strlen works */
1008
1009         /* Add on the account info bits and the time of last password change. */
1010         if(got_pass_last_set_time) {
1011                 slprintf(&ascii_p16[strlen(ascii_p16)], 
1012                         sizeof(ascii_p16)-(strlen(ascii_p16)+1),
1013                         "%s:LCT-%08X:", 
1014                         encode_bits, (uint32_t)pwd->pass_last_set_time );
1015                 wr_len = strlen(ascii_p16);
1016         }
1017
1018 #ifdef DEBUG_PASSWORD
1019         DEBUG(100,("mod_smbfilepwd_entry: "));
1020         dump_data(100, (uint8_t *)ascii_p16, wr_len);
1021 #endif
1022
1023         if(wr_len > LINEBUF_SIZE) {
1024                 DEBUG(0, ("mod_smbfilepwd_entry: line to write (%d) is too long.\n", wr_len+1));
1025                 pw_file_unlock(lockfd,&smbpasswd_state->pw_file_lock_depth);
1026                 fclose(fp);
1027                 return (False);
1028         }
1029
1030         /*
1031          * Do an atomic write into the file at the position defined by
1032          * seekpos.
1033          */
1034
1035         /* The mod user write needs to be atomic - so get the fd from 
1036                 the fp and do a raw write() call.
1037          */
1038
1039         fd = fileno(fp);
1040
1041         if (lseek(fd, pwd_seekpos - 1, SEEK_SET) != pwd_seekpos - 1) {
1042                 DEBUG(0, ("mod_smbfilepwd_entry: seek fail on file %s.\n", pfile));
1043                 pw_file_unlock(lockfd,&smbpasswd_state->pw_file_lock_depth);
1044                 fclose(fp);
1045                 return False;
1046         }
1047
1048         /* Sanity check - ensure the areas we are writing are framed by ':' */
1049         if (read(fd, linebuf, wr_len+1) != wr_len+1) {
1050                 DEBUG(0, ("mod_smbfilepwd_entry: read fail on file %s.\n", pfile));
1051                 pw_file_unlock(lockfd,&smbpasswd_state->pw_file_lock_depth);
1052                 fclose(fp);
1053                 return False;
1054         }
1055
1056         if ((linebuf[0] != ':') || (linebuf[wr_len] != ':'))    {
1057                 DEBUG(0, ("mod_smbfilepwd_entry: check on passwd file %s failed.\n", pfile));
1058                 pw_file_unlock(lockfd,&smbpasswd_state->pw_file_lock_depth);
1059                 fclose(fp);
1060                 return False;
1061         }
1062  
1063         if (lseek(fd, pwd_seekpos, SEEK_SET) != pwd_seekpos) {
1064                 DEBUG(0, ("mod_smbfilepwd_entry: seek fail on file %s.\n", pfile));
1065                 pw_file_unlock(lockfd,&smbpasswd_state->pw_file_lock_depth);
1066                 fclose(fp);
1067                 return False;
1068         }
1069
1070         if (write(fd, ascii_p16, wr_len) != wr_len) {
1071                 DEBUG(0, ("mod_smbfilepwd_entry: write failed in passwd file %s\n", pfile));
1072                 pw_file_unlock(lockfd,&smbpasswd_state->pw_file_lock_depth);
1073                 fclose(fp);
1074                 return False;
1075         }
1076
1077         pw_file_unlock(lockfd,&smbpasswd_state->pw_file_lock_depth);
1078         fclose(fp);
1079         return True;
1080 }
1081
1082 /************************************************************************
1083  Routine to delete an entry in the smbpasswd file by name.
1084 *************************************************************************/
1085
1086 static bool del_smbfilepwd_entry(struct smbpasswd_privates *smbpasswd_state, const char *name)
1087 {
1088         const char *pfile = smbpasswd_state->smbpasswd_file;
1089         char *pfile2 = NULL;
1090         struct smb_passwd *pwd = NULL;
1091         FILE *fp = NULL;
1092         FILE *fp_write = NULL;
1093         int pfile2_lockdepth = 0;
1094
1095         pfile2 = talloc_asprintf(talloc_tos(),
1096                         "%s.%u",
1097                         pfile, (unsigned)getpid());
1098         if (!pfile2) {
1099                 return false;
1100         }
1101
1102         /*
1103          * Open the smbpassword file - for update. It needs to be update
1104          * as we need any other processes to wait until we have replaced
1105          * it.
1106          */
1107
1108         if((fp = startsmbfilepwent(pfile, PWF_UPDATE, &smbpasswd_state->pw_file_lock_depth)) == NULL) {
1109                 DEBUG(0, ("del_smbfilepwd_entry: unable to open file %s.\n", pfile));
1110                 return False;
1111         }
1112
1113         /*
1114          * Create the replacement password file.
1115          */
1116         if((fp_write = startsmbfilepwent(pfile2, PWF_CREATE, &pfile2_lockdepth)) == NULL) {
1117                 DEBUG(0, ("del_smbfilepwd_entry: unable to open file %s.\n", pfile));
1118                 endsmbfilepwent(fp, &smbpasswd_state->pw_file_lock_depth);
1119                 return False;
1120         }
1121
1122         /*
1123          * Scan the file, a line at a time and check if the name matches.
1124          */
1125
1126         while ((pwd = getsmbfilepwent(smbpasswd_state, fp)) != NULL) {
1127                 char *new_entry;
1128                 size_t new_entry_length;
1129
1130                 if (strequal(name, pwd->smb_name)) {
1131                         DEBUG(10, ("del_smbfilepwd_entry: found entry with "
1132                                    "name %s - deleting it.\n", name));
1133                         continue;
1134                 }
1135
1136                 /*
1137                  * We need to copy the entry out into the second file.
1138                  */
1139
1140                 if((new_entry = format_new_smbpasswd_entry(pwd)) == NULL) {
1141                         DEBUG(0, ("del_smbfilepwd_entry(malloc): Failed to copy entry for user %s to file %s. \
1142 Error was %s\n", pwd->smb_name, pfile2, strerror(errno)));
1143                         unlink(pfile2);
1144                         endsmbfilepwent(fp, &smbpasswd_state->pw_file_lock_depth);
1145                         endsmbfilepwent(fp_write, &pfile2_lockdepth);
1146                         return False;
1147                 }
1148
1149                 new_entry_length = strlen(new_entry);
1150
1151                 if(fwrite(new_entry, 1, new_entry_length, fp_write) != new_entry_length) {
1152                         DEBUG(0, ("del_smbfilepwd_entry(write): Failed to copy entry for user %s to file %s. \
1153 Error was %s\n", pwd->smb_name, pfile2, strerror(errno)));
1154                         unlink(pfile2);
1155                         endsmbfilepwent(fp, &smbpasswd_state->pw_file_lock_depth);
1156                         endsmbfilepwent(fp_write, &pfile2_lockdepth);
1157                         free(new_entry);
1158                         return False;
1159                 }
1160
1161                 free(new_entry);
1162         }
1163
1164         /*
1165          * Ensure pfile2 is flushed before rename.
1166          */
1167
1168         if(fflush(fp_write) != 0) {
1169                 DEBUG(0, ("del_smbfilepwd_entry: Failed to flush file %s. Error was %s\n", pfile2, strerror(errno)));
1170                 endsmbfilepwent(fp, &smbpasswd_state->pw_file_lock_depth);
1171                 endsmbfilepwent(fp_write,&pfile2_lockdepth);
1172                 return False;
1173         }
1174
1175         /*
1176          * Do an atomic rename - then release the locks.
1177          */
1178
1179         if(rename(pfile2,pfile) != 0) {
1180                 unlink(pfile2);
1181         }
1182
1183         endsmbfilepwent(fp, &smbpasswd_state->pw_file_lock_depth);
1184         endsmbfilepwent(fp_write,&pfile2_lockdepth);
1185         return True;
1186 }
1187
1188 /*********************************************************************
1189  Create a smb_passwd struct from a struct samu.
1190  We will not allocate any new memory.  The smb_passwd struct
1191  should only stay around as long as the struct samu does.
1192  ********************************************************************/
1193
1194 static bool build_smb_pass (struct smb_passwd *smb_pw, const struct samu *sampass)
1195 {
1196         uint32_t rid;
1197
1198         if (sampass == NULL) 
1199                 return False;
1200         ZERO_STRUCTP(smb_pw);
1201
1202         if (!IS_SAM_DEFAULT(sampass, PDB_USERSID)) {
1203                 rid = pdb_get_user_rid(sampass);
1204
1205                 /* If the user specified a RID, make sure its able to be both stored and retreived */
1206                 if (rid == DOMAIN_RID_GUEST) {
1207                         struct passwd *passwd = Get_Pwnam_alloc(NULL, lp_guest_account());
1208                         if (!passwd) {
1209                                 DEBUG(0, ("Could not find guest account via Get_Pwnam_alloc()! (%s)\n", lp_guest_account()));
1210                                 return False;
1211                         }
1212                         smb_pw->smb_userid=passwd->pw_uid;
1213                         TALLOC_FREE(passwd);
1214                 } else if (algorithmic_pdb_rid_is_user(rid)) {
1215                         smb_pw->smb_userid=algorithmic_pdb_user_rid_to_uid(rid);
1216                 } else {
1217                         DEBUG(0,("build_sam_pass: Failing attempt to store user with non-uid based user RID. \n"));
1218                         return False;
1219                 }
1220         }
1221
1222         smb_pw->smb_name=(const char*)pdb_get_username(sampass);
1223
1224         smb_pw->smb_passwd=pdb_get_lanman_passwd(sampass);
1225         smb_pw->smb_nt_passwd=pdb_get_nt_passwd(sampass);
1226
1227         smb_pw->acct_ctrl=pdb_get_acct_ctrl(sampass);
1228         smb_pw->pass_last_set_time=pdb_get_pass_last_set_time(sampass);
1229
1230         return True;
1231 }       
1232
1233 /*********************************************************************
1234  Create a struct samu from a smb_passwd struct
1235  ********************************************************************/
1236
1237 static bool build_sam_account(struct smbpasswd_privates *smbpasswd_state, 
1238                               struct samu *sam_pass, const struct smb_passwd *pw_buf)
1239 {
1240         struct passwd *pwfile;
1241
1242         if ( !sam_pass ) {
1243                 DEBUG(5,("build_sam_account: struct samu is NULL\n"));
1244                 return False;
1245         }
1246
1247         /* verify the user account exists */
1248
1249         if ( !(pwfile = Get_Pwnam_alloc(NULL, pw_buf->smb_name )) ) {
1250                 DEBUG(0,("build_sam_account: smbpasswd database is corrupt!  username %s with uid "
1251                 "%u is not in unix passwd database!\n", pw_buf->smb_name, pw_buf->smb_userid));
1252                         return False;
1253         }
1254
1255         if ( !NT_STATUS_IS_OK( samu_set_unix(sam_pass, pwfile )) )
1256                 return False;
1257
1258         TALLOC_FREE(pwfile);
1259
1260         /* set remaining fields */
1261
1262         if (!pdb_set_nt_passwd (sam_pass, pw_buf->smb_nt_passwd, PDB_SET))
1263                 return False;
1264         if (!pdb_set_lanman_passwd (sam_pass, pw_buf->smb_passwd, PDB_SET))
1265                 return False;
1266         pdb_set_acct_ctrl (sam_pass, pw_buf->acct_ctrl, PDB_SET);
1267         pdb_set_pass_last_set_time (sam_pass, pw_buf->pass_last_set_time, PDB_SET);
1268         pdb_set_pass_can_change_time (sam_pass, pw_buf->pass_last_set_time, PDB_SET);
1269
1270         return True;
1271 }
1272
1273 /*****************************************************************
1274  Functions to be implemented by the new passdb API 
1275  ****************************************************************/
1276
1277 /****************************************************************
1278  Search smbpasswd file by iterating over the entries.  Do not
1279  call getpwnam() for unix account information until we have found
1280  the correct entry
1281  ***************************************************************/
1282
1283 static NTSTATUS smbpasswd_getsampwnam(struct pdb_methods *my_methods, 
1284                                   struct samu *sam_acct, const char *username)
1285 {
1286         NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
1287         struct smbpasswd_privates *smbpasswd_state = (struct smbpasswd_privates*)my_methods->private_data;
1288         struct smb_passwd *smb_pw;
1289         FILE *fp = NULL;
1290
1291         DEBUG(10, ("getsampwnam (smbpasswd): search by name: %s\n", username));
1292
1293         /* startsmbfilepwent() is used here as we don't want to lookup
1294            the UNIX account in the local system password file until
1295            we have a match.  */
1296         fp = startsmbfilepwent(smbpasswd_state->smbpasswd_file, PWF_READ, &(smbpasswd_state->pw_file_lock_depth));
1297
1298         if (fp == NULL) {
1299                 DEBUG(0, ("Unable to open passdb database.\n"));
1300                 return nt_status;
1301         }
1302
1303         while ( ((smb_pw=getsmbfilepwent(smbpasswd_state, fp)) != NULL)&& (!strequal(smb_pw->smb_name, username)) )
1304                 /* do nothing....another loop */ ;
1305
1306         endsmbfilepwent(fp, &(smbpasswd_state->pw_file_lock_depth));
1307
1308
1309         /* did we locate the username in smbpasswd  */
1310         if (smb_pw == NULL)
1311                 return nt_status;
1312
1313         DEBUG(10, ("getsampwnam (smbpasswd): found by name: %s\n", smb_pw->smb_name));
1314
1315         if (!sam_acct) {
1316                 DEBUG(10,("getsampwnam (smbpasswd): struct samu is NULL\n"));
1317                 return nt_status;
1318         }
1319
1320         /* now build the struct samu */
1321         if (!build_sam_account(smbpasswd_state, sam_acct, smb_pw))
1322                 return nt_status;
1323
1324         /* success */
1325         return NT_STATUS_OK;
1326 }
1327
1328 static NTSTATUS smbpasswd_getsampwsid(struct pdb_methods *my_methods, struct samu *sam_acct, const struct dom_sid *sid)
1329 {
1330         NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
1331         struct smbpasswd_privates *smbpasswd_state = (struct smbpasswd_privates*)my_methods->private_data;
1332         struct smb_passwd *smb_pw;
1333         struct dom_sid_buf buf;
1334         FILE *fp = NULL;
1335         uint32_t rid;
1336
1337         DEBUG(10, ("smbpasswd_getsampwrid: search by sid: %s\n",
1338                    dom_sid_str_buf(sid, &buf)));
1339
1340         if (!sid_peek_check_rid(get_global_sam_sid(), sid, &rid))
1341                 return NT_STATUS_UNSUCCESSFUL;
1342
1343         /* More special case 'guest account' hacks... */
1344         if (rid == DOMAIN_RID_GUEST) {
1345                 const char *guest_account = lp_guest_account();
1346                 if (!(guest_account && *guest_account)) {
1347                         DEBUG(1, ("Guest account not specified!\n"));
1348                         return nt_status;
1349                 }
1350                 return smbpasswd_getsampwnam(my_methods, sam_acct, guest_account);
1351         }
1352
1353         /* Open the sam password file - not for update. */
1354         fp = startsmbfilepwent(smbpasswd_state->smbpasswd_file, PWF_READ, &(smbpasswd_state->pw_file_lock_depth));
1355
1356         if (fp == NULL) {
1357                 DEBUG(0, ("Unable to open passdb database.\n"));
1358                 return nt_status;
1359         }
1360
1361         while ( ((smb_pw=getsmbfilepwent(smbpasswd_state, fp)) != NULL) && (algorithmic_pdb_uid_to_user_rid(smb_pw->smb_userid) != rid) )
1362                 /* do nothing */ ;
1363
1364         endsmbfilepwent(fp, &(smbpasswd_state->pw_file_lock_depth));
1365
1366
1367         /* did we locate the username in smbpasswd  */
1368         if (smb_pw == NULL)
1369                 return nt_status;
1370
1371         DEBUG(10, ("getsampwrid (smbpasswd): found by name: %s\n", smb_pw->smb_name));
1372
1373         if (!sam_acct) {
1374                 DEBUG(10,("getsampwrid: (smbpasswd) struct samu is NULL\n"));
1375                 return nt_status;
1376         }
1377
1378         /* now build the struct samu */
1379         if (!build_sam_account (smbpasswd_state, sam_acct, smb_pw))
1380                 return nt_status;
1381
1382         /* build_sam_account might change the SID on us, if the name was for the guest account */
1383         if (NT_STATUS_IS_OK(nt_status) && !dom_sid_equal(pdb_get_user_sid(sam_acct), sid)) {
1384                 struct dom_sid_buf buf1, buf2;
1385                 DEBUG(1, ("looking for user with sid %s instead returned %s "
1386                           "for account %s!?!\n",
1387                           dom_sid_str_buf(sid, &buf1),
1388                           dom_sid_str_buf(pdb_get_user_sid(sam_acct), &buf2),
1389                           pdb_get_username(sam_acct)));
1390                 return NT_STATUS_NO_SUCH_USER;
1391         }
1392
1393         /* success */
1394         return NT_STATUS_OK;
1395 }
1396
1397 static NTSTATUS smbpasswd_add_sam_account(struct pdb_methods *my_methods, struct samu *sampass)
1398 {
1399         struct smbpasswd_privates *smbpasswd_state = (struct smbpasswd_privates*)my_methods->private_data;
1400         struct smb_passwd smb_pw;
1401
1402         /* convert the struct samu */
1403         if (!build_smb_pass(&smb_pw, sampass)) {
1404                 return NT_STATUS_UNSUCCESSFUL;
1405         }
1406
1407         /* add the entry */
1408         return add_smbfilepwd_entry(smbpasswd_state, &smb_pw);
1409 }
1410
1411 static NTSTATUS smbpasswd_update_sam_account(struct pdb_methods *my_methods, struct samu *sampass)
1412 {
1413         struct smbpasswd_privates *smbpasswd_state = (struct smbpasswd_privates*)my_methods->private_data;
1414         struct smb_passwd smb_pw;
1415
1416         /* convert the struct samu */
1417         if (!build_smb_pass(&smb_pw, sampass)) {
1418                 DEBUG(0, ("smbpasswd_update_sam_account: build_smb_pass failed!\n"));
1419                 return NT_STATUS_UNSUCCESSFUL;
1420         }
1421
1422         /* update the entry */
1423         if(!mod_smbfilepwd_entry(smbpasswd_state, &smb_pw)) {
1424                 DEBUG(0, ("smbpasswd_update_sam_account: mod_smbfilepwd_entry failed!\n"));
1425                 return NT_STATUS_UNSUCCESSFUL;
1426         }
1427
1428         return NT_STATUS_OK;
1429 }
1430
1431 static NTSTATUS smbpasswd_delete_sam_account (struct pdb_methods *my_methods, struct samu *sampass)
1432 {
1433         struct smbpasswd_privates *smbpasswd_state = (struct smbpasswd_privates*)my_methods->private_data;
1434
1435         const char *username = pdb_get_username(sampass);
1436
1437         if (del_smbfilepwd_entry(smbpasswd_state, username))
1438                 return NT_STATUS_OK;
1439
1440         return NT_STATUS_UNSUCCESSFUL;
1441 }
1442
1443 static NTSTATUS smbpasswd_rename_sam_account (struct pdb_methods *my_methods, 
1444                                               struct samu *old_acct,
1445                                               const char *newname)
1446 {
1447         const struct loadparm_substitution *lp_sub =
1448                 loadparm_s3_global_substitution();
1449         char *rename_script = NULL;
1450         struct samu *new_acct = NULL;
1451         bool interim_account = False;
1452         TALLOC_CTX *ctx = talloc_tos();
1453         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
1454
1455         if (!*(lp_rename_user_script(talloc_tos(), lp_sub)))
1456                 goto done;
1457
1458         if ( !(new_acct = samu_new( NULL )) ) {
1459                 return NT_STATUS_NO_MEMORY;
1460         }
1461
1462         if ( !pdb_copy_sam_account( new_acct, old_acct ) 
1463                 || !pdb_set_username(new_acct, newname, PDB_CHANGED)) 
1464         {
1465                 goto done;
1466         }
1467
1468         ret = smbpasswd_add_sam_account(my_methods, new_acct);
1469         if (!NT_STATUS_IS_OK(ret))
1470                 goto done;
1471
1472         interim_account = True;
1473
1474         /* rename the posix user */
1475         rename_script = lp_rename_user_script(ctx, lp_sub);
1476         if (!rename_script) {
1477                 ret = NT_STATUS_NO_MEMORY;
1478                 goto done;
1479         }
1480
1481         if (*rename_script) {
1482                 int rename_ret;
1483
1484                 rename_script = talloc_string_sub2(ctx,
1485                                         rename_script,
1486                                         "%unew",
1487                                         newname,
1488                                         true,
1489                                         false,
1490                                         true);
1491                 if (!rename_script) {
1492                         ret = NT_STATUS_NO_MEMORY;
1493                         goto done;
1494                 }
1495                 rename_script = talloc_string_sub2(ctx,
1496                                         rename_script,
1497                                         "%uold",
1498                                         pdb_get_username(old_acct),
1499                                         true,
1500                                         false,
1501                                         true);
1502                 if (!rename_script) {
1503                         ret = NT_STATUS_NO_MEMORY;
1504                         goto done;
1505                 }
1506
1507                 rename_ret = smbrun(rename_script, NULL, NULL);
1508
1509                 DEBUG(rename_ret ? 0 : 3,("Running the command `%s' gave %d\n", rename_script, rename_ret));
1510
1511                 if (rename_ret == 0) {
1512                         smb_nscd_flush_user_cache();
1513                 }
1514
1515                 if (rename_ret)
1516                         goto done;
1517         } else {
1518                 goto done;
1519         }
1520
1521         smbpasswd_delete_sam_account(my_methods, old_acct);
1522         interim_account = False;
1523
1524 done:
1525         /* cleanup */
1526         if (interim_account)
1527                 smbpasswd_delete_sam_account(my_methods, new_acct);
1528
1529         if (new_acct)
1530                 TALLOC_FREE(new_acct);
1531
1532         return (ret);   
1533 }
1534
1535 static uint32_t smbpasswd_capabilities(struct pdb_methods *methods)
1536 {
1537         return 0;
1538 }
1539
1540 static void free_private_data(void **vp) 
1541 {
1542         struct smbpasswd_privates **privates = (struct smbpasswd_privates**)vp;
1543
1544         endsmbfilepwent((*privates)->pw_file, &((*privates)->pw_file_lock_depth));
1545
1546         *privates = NULL;
1547         /* No need to free any further, as it is talloc()ed */
1548 }
1549
1550 struct smbpasswd_search_state {
1551         uint32_t acct_flags;
1552
1553         struct samr_displayentry *entries;
1554         uint32_t num_entries;
1555         ssize_t array_size;
1556         uint32_t current;
1557 };
1558
1559 static void smbpasswd_search_end(struct pdb_search *search)
1560 {
1561         struct smbpasswd_search_state *state = talloc_get_type_abort(
1562                 search->private_data, struct smbpasswd_search_state);
1563         TALLOC_FREE(state);
1564 }
1565
1566 static bool smbpasswd_search_next_entry(struct pdb_search *search,
1567                                         struct samr_displayentry *entry)
1568 {
1569         struct smbpasswd_search_state *state = talloc_get_type_abort(
1570                 search->private_data, struct smbpasswd_search_state);
1571
1572         if (state->current == state->num_entries) {
1573                 return false;
1574         }
1575
1576         entry->idx = state->entries[state->current].idx;
1577         entry->rid = state->entries[state->current].rid;
1578         entry->acct_flags = state->entries[state->current].acct_flags;
1579
1580         entry->account_name = talloc_strdup(
1581                 search, state->entries[state->current].account_name);
1582         entry->fullname = talloc_strdup(
1583                 search, state->entries[state->current].fullname);
1584         entry->description = talloc_strdup(
1585                 search, state->entries[state->current].description);
1586
1587         if ((entry->account_name == NULL) || (entry->fullname == NULL)
1588             || (entry->description == NULL)) {
1589                 DEBUG(0, ("talloc_strdup failed\n"));
1590                 return false;
1591         }
1592
1593         state->current += 1;
1594         return true;
1595 }
1596
1597 static bool smbpasswd_search_users(struct pdb_methods *methods,
1598                                    struct pdb_search *search,
1599                                    uint32_t acct_flags)
1600 {
1601         struct smbpasswd_privates *smbpasswd_state =
1602                 (struct smbpasswd_privates*)methods->private_data;
1603
1604         struct smbpasswd_search_state *search_state;
1605         struct smb_passwd *pwd;
1606         FILE *fp;
1607
1608         search_state = talloc_zero(search, struct smbpasswd_search_state);
1609         if (search_state == NULL) {
1610                 DEBUG(0, ("talloc failed\n"));
1611                 return false;
1612         }
1613         search_state->acct_flags = acct_flags;
1614
1615         fp = startsmbfilepwent(smbpasswd_state->smbpasswd_file, PWF_READ,
1616                                &smbpasswd_state->pw_file_lock_depth);
1617
1618         if (fp == NULL) {
1619                 DEBUG(10, ("Unable to open smbpasswd file.\n"));
1620                 TALLOC_FREE(search_state);
1621                 return false;
1622         }
1623
1624         while ((pwd = getsmbfilepwent(smbpasswd_state, fp)) != NULL) {
1625                 struct samr_displayentry entry;
1626                 struct samu *user;
1627
1628                 if ((acct_flags != 0)
1629                     && ((acct_flags & pwd->acct_ctrl) == 0)) {
1630                         continue;
1631                 }
1632
1633                 user = samu_new(talloc_tos());
1634                 if (user == NULL) {
1635                         DEBUG(0, ("samu_new failed\n"));
1636                         break;
1637                 }
1638
1639                 if (!build_sam_account(smbpasswd_state, user, pwd)) {
1640                         /* Already got debug msgs... */
1641                         break;
1642                 }
1643
1644                 ZERO_STRUCT(entry);
1645
1646                 entry.acct_flags = pdb_get_acct_ctrl(user);
1647                 sid_peek_rid(pdb_get_user_sid(user), &entry.rid);
1648                 entry.account_name = talloc_strdup(
1649                         search_state, pdb_get_username(user));
1650                 entry.fullname = talloc_strdup(
1651                         search_state, pdb_get_fullname(user));
1652                 entry.description = talloc_strdup(
1653                         search_state, pdb_get_acct_desc(user));
1654
1655                 TALLOC_FREE(user);
1656
1657                 if ((entry.account_name == NULL) || (entry.fullname == NULL)
1658                     || (entry.description == NULL)) {
1659                         DEBUG(0, ("talloc_strdup failed\n"));
1660                         break;
1661                 }
1662
1663                 ADD_TO_LARGE_ARRAY(search_state, struct samr_displayentry,
1664                                    entry, &search_state->entries,
1665                                    &search_state->num_entries,
1666                                    &search_state->array_size);
1667         }
1668
1669         endsmbfilepwent(fp, &(smbpasswd_state->pw_file_lock_depth));
1670
1671         search->private_data = search_state;
1672         search->next_entry = smbpasswd_search_next_entry;
1673         search->search_end = smbpasswd_search_end;
1674
1675         return true;
1676 }
1677
1678 static NTSTATUS pdb_init_smbpasswd( struct pdb_methods **pdb_method, const char *location )
1679 {
1680         NTSTATUS nt_status;
1681         struct smbpasswd_privates *privates;
1682
1683         if ( !NT_STATUS_IS_OK(nt_status = make_pdb_method( pdb_method )) ) {
1684                 return nt_status;
1685         }
1686
1687         (*pdb_method)->name = "smbpasswd";
1688
1689         (*pdb_method)->getsampwnam = smbpasswd_getsampwnam;
1690         (*pdb_method)->getsampwsid = smbpasswd_getsampwsid;
1691         (*pdb_method)->add_sam_account = smbpasswd_add_sam_account;
1692         (*pdb_method)->update_sam_account = smbpasswd_update_sam_account;
1693         (*pdb_method)->delete_sam_account = smbpasswd_delete_sam_account;
1694         (*pdb_method)->rename_sam_account = smbpasswd_rename_sam_account;
1695         (*pdb_method)->search_users = smbpasswd_search_users;
1696
1697         (*pdb_method)->capabilities = smbpasswd_capabilities;
1698
1699         /* Setup private data and free function */
1700
1701         if ( !(privates = talloc_zero( *pdb_method, struct smbpasswd_privates )) ) {
1702                 DEBUG(0, ("talloc() failed for smbpasswd private_data!\n"));
1703                 return NT_STATUS_NO_MEMORY;
1704         }
1705
1706         /* Store some config details */
1707
1708         if (location) {
1709                 privates->smbpasswd_file = talloc_strdup(*pdb_method, location);
1710         } else {
1711                 privates->smbpasswd_file = talloc_strdup(*pdb_method, lp_smb_passwd_file());
1712         }
1713
1714         if (!privates->smbpasswd_file) {
1715                 DEBUG(0, ("talloc_strdp() failed for storing smbpasswd location!\n"));
1716                 return NT_STATUS_NO_MEMORY;
1717         }
1718
1719         (*pdb_method)->private_data = privates;
1720
1721         (*pdb_method)->free_private_data = free_private_data;
1722
1723         return NT_STATUS_OK;
1724 }
1725
1726 NTSTATUS pdb_smbpasswd_init(TALLOC_CTX *ctx) 
1727 {
1728         return smb_register_passdb(PASSDB_INTERFACE_VERSION, "smbpasswd", pdb_init_smbpasswd);
1729 }