summaryrefslogtreecommitdiff
path: root/source3/passdb/pdb_interface.c
blob: a94b8b8992a5c8dab7363cafd45d3094b63f8a2e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
/* 
   Unix SMB/CIFS implementation.
   Password and authentication handling
   Copyright (C) Andrew Bartlett			2002
   Copyright (C) Jelmer Vernooij			2002

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "includes.h"

#undef DBGC_CLASS
#define DBGC_CLASS DBGC_PASSDB

/** List of various built-in passdb modules */

const struct pdb_init_function_entry builtin_pdb_init_functions[] = {
	{ "smbpasswd", pdb_init_smbpasswd },
	{ "smbpasswd_nua", pdb_init_smbpasswd_nua },
	{ "tdbsam", pdb_init_tdbsam },
	{ "tdbsam_nua", pdb_init_tdbsam_nua },
	{ "ldapsam", pdb_init_ldapsam },
	{ "ldapsam_nua", pdb_init_ldapsam_nua },
	{ "unixsam", pdb_init_unixsam },
	{ "nisplussam", pdb_init_nisplussam },
	{ "plugin", pdb_init_plugin },
	{ NULL, NULL}
};

static NTSTATUS context_setsampwent(struct pdb_context *context, BOOL update)
{
	NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;

	if (!context) {
		DEBUG(0, ("invalid pdb_context specified!\n"));
		return ret;
	}

	context->pwent_methods = context->pdb_methods;

	if (!context->pwent_methods) {
		/* No passdbs at all */
		return ret;
	}

	while (NT_STATUS_IS_ERR(ret = context->pwent_methods->setsampwent(context->pwent_methods, update))) {
		context->pwent_methods = context->pwent_methods->next;
		if (context->pwent_methods == NULL) 
			return NT_STATUS_UNSUCCESSFUL;
	}
	return ret;
}

static void context_endsampwent(struct pdb_context *context)
{
	if ((!context)){
		DEBUG(0, ("invalid pdb_context specified!\n"));
		return;
	}

	if (context->pwent_methods && context->pwent_methods->endsampwent)
		context->pwent_methods->endsampwent(context->pwent_methods);

	/* So we won't get strange data when calling getsampwent now */
	context->pwent_methods = NULL;
}

static NTSTATUS context_getsampwent(struct pdb_context *context, SAM_ACCOUNT *user)
{
	NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;

	if ((!context) || (!context->pwent_methods)) {
		DEBUG(0, ("invalid pdb_context specified!\n"));
		return ret;
	}
	/* Loop until we find something useful */
	while (NT_STATUS_IS_ERR(ret = context->pwent_methods->getsampwent(context->pwent_methods, user))) {

		context->pwent_methods->endsampwent(context->pwent_methods);

		context->pwent_methods = context->pwent_methods->next;

		/* All methods are checked now. There are no more entries */
		if (context->pwent_methods == NULL)
			return ret;
	
		context->pwent_methods->setsampwent(context->pwent_methods, False);
	}
	user->methods = context->pwent_methods;
	return ret;
}

static NTSTATUS context_getsampwnam(struct pdb_context *context, SAM_ACCOUNT *sam_acct, const char *username)
{
	NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;

	struct pdb_methods *curmethods;
	if ((!context)) {
		DEBUG(0, ("invalid pdb_context specified!\n"));
		return ret;
	}
	curmethods = context->pdb_methods;
	while (curmethods){
		if (NT_STATUS_IS_OK(ret = curmethods->getsampwnam(curmethods, sam_acct, username))) {
			sam_acct->methods = curmethods;
			return ret;
		}
		curmethods = curmethods->next;
	}

	return ret;
}

static NTSTATUS context_getsampwsid(struct pdb_context *context, SAM_ACCOUNT *sam_acct, const DOM_SID *sid)
{
	NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;

	struct pdb_methods *curmethods;
	if ((!context)) {
		DEBUG(0, ("invalid pdb_context specified!\n"));
		return ret;
	}
	
	curmethods = context->pdb_methods;

	while (curmethods){
		if (NT_STATUS_IS_OK(ret = curmethods->getsampwsid(curmethods, sam_acct, sid))) {
			sam_acct->methods = curmethods;
			return ret;
		}
		curmethods = curmethods->next;
	}

	return ret;
}

static NTSTATUS context_add_sam_account(struct pdb_context *context, SAM_ACCOUNT *sam_acct)
{
	NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;

	if ((!context) || (!context->pdb_methods)) {
		DEBUG(0, ("invalid pdb_context specified!\n"));
		return ret;
	}

	/** @todo  This is where a 're-read on add' should be done */
	/* We now add a new account to the first database listed. 
	 * Should we? */

	return context->pdb_methods->add_sam_account(context->pdb_methods, sam_acct);
}

static NTSTATUS context_update_sam_account(struct pdb_context *context, SAM_ACCOUNT *sam_acct)
{
	NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;

	if (!context) {
		DEBUG(0, ("invalid pdb_context specified!\n"));
		return ret;
	}

	if (!sam_acct || !sam_acct->methods){
		DEBUG(0, ("invalid sam_acct specified\n"));
		return ret;
	}

	/** @todo  This is where a 're-read on update' should be done */

	return sam_acct->methods->update_sam_account(sam_acct->methods, sam_acct);
}

static NTSTATUS context_delete_sam_account(struct pdb_context *context, SAM_ACCOUNT *sam_acct)
{
	NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;

	struct pdb_methods *pdb_selected;
	if (!context) {
		DEBUG(0, ("invalid pdb_context specified!\n"));
		return ret;
	}

	if (!sam_acct->methods){
		pdb_selected = context->pdb_methods;
		/* There's no passdb backend specified for this account.
		 * Try to delete it in every passdb available 
		 * Needed to delete accounts in smbpasswd that are not
		 * in /etc/passwd.
		 */
		while (pdb_selected){
			if (NT_STATUS_IS_OK(ret = pdb_selected->delete_sam_account(pdb_selected, sam_acct))) {
				return ret;
			}
			pdb_selected = pdb_selected->next;
		}
		return ret;
	}

	if (!sam_acct->methods->delete_sam_account){
		DEBUG(0,("invalid sam_acct->methods->delete_sam_account\n"));
		return ret;
	}
	
	return sam_acct->methods->delete_sam_account(sam_acct->methods, sam_acct);
}

/******************************************************************
  Free and cleanup a pdb context, any associated data and anything
  that the attached modules might have associated.
 *******************************************************************/

static void free_pdb_context(struct pdb_context **context)
{
	struct pdb_methods *pdb_selected = (*context)->pdb_methods;

	while (pdb_selected){
		pdb_selected->free_private_data(&(pdb_selected->private_data));
		pdb_selected = pdb_selected->next;
	}

	talloc_destroy((*context)->mem_ctx);
	*context = NULL;
}

/******************************************************************
  Make a pdb_methods from scratch
 *******************************************************************/

static NTSTATUS make_pdb_methods_name(struct pdb_methods **methods, struct pdb_context *context, const char *selected)
{
	char *module_name = smb_xstrdup(selected);
	char *module_location = NULL, *p;
	NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
	int i;

	p = strchr(module_name, ':');

	if (p) {
		*p = 0;
		module_location = p+1;
		trim_string(module_location, " ", " ");
	}

	trim_string(module_name, " ", " ");

	DEBUG(5,("Attempting to find an passdb backend to match %s (%s)\n", selected, module_name));
	for (i = 0; builtin_pdb_init_functions[i].name; i++)
	{
		if (strequal(builtin_pdb_init_functions[i].name, module_name))
		{
			DEBUG(5,("Found pdb backend %s (at pos %d)\n", module_name, i));
			nt_status = builtin_pdb_init_functions[i].init(context, methods, module_location);
			if (NT_STATUS_IS_OK(nt_status)) {
				DEBUG(5,("pdb backend %s has a valid init\n", selected));
			} else {
				DEBUG(0,("pdb backend %s did not correctly init (error was %s)\n", selected, nt_errstr(nt_status)));
			}
			SAFE_FREE(module_name);
			return nt_status;
			break; /* unreached */
		}
	}

	/* No such backend found */
	SAFE_FREE(module_name);
	return NT_STATUS_INVALID_PARAMETER;
}

/******************************************************************
  Make a pdb_context from scratch.
 *******************************************************************/

static NTSTATUS make_pdb_context(struct pdb_context **context) 
{
	TALLOC_CTX *mem_ctx;

	mem_ctx = talloc_init_named("pdb_context internal allocation context");

	if (!mem_ctx) {
		DEBUG(0, ("make_pdb_context: talloc init failed!\n"));
		return NT_STATUS_NO_MEMORY;
	}		

	*context = talloc(mem_ctx, sizeof(**context));
	if (!*context) {
		DEBUG(0, ("make_pdb_context: talloc failed!\n"));
		return NT_STATUS_NO_MEMORY;
	}

	ZERO_STRUCTP(*context);

	(*context)->mem_ctx = mem_ctx;

	(*context)->pdb_setsampwent = context_setsampwent;
	(*context)->pdb_endsampwent = context_endsampwent;
	(*context)->pdb_getsampwent = context_getsampwent;
	(*context)->pdb_getsampwnam = context_getsampwnam;
	(*context)->pdb_getsampwsid = context_getsampwsid;
	(*context)->pdb_add_sam_account = context_add_sam_account;
	(*context)->pdb_update_sam_account = context_update_sam_account;
	(*context)->pdb_delete_sam_account = context_delete_sam_account;

	(*context)->free_fn = free_pdb_context;

	return NT_STATUS_OK;
}


/******************************************************************
  Make a pdb_context, given an array of strings
 *******************************************************************/

NTSTATUS make_pdb_context_list(struct pdb_context **context, char **selected) 
{
	int i = 0;
	struct pdb_methods *curmethods, *tmpmethods;
	NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;

	if (!NT_STATUS_IS_OK(nt_status = make_pdb_context(context))) {
		return nt_status;
	}

	while (selected[i]){
		/* Try to initialise pdb */
		DEBUG(5,("Trying to load: %s\n", selected[i]));
		if (!NT_STATUS_IS_OK(nt_status = make_pdb_methods_name(&curmethods, *context, selected[i]))) {
			DEBUG(1, ("Loading %s failed!\n", selected[i]));
			free_pdb_context(context);
			return nt_status;
		}
		curmethods->parent = *context;
		DLIST_ADD_END((*context)->pdb_methods, curmethods, tmpmethods);
		i++;
	}

	return NT_STATUS_OK;
}

/******************************************************************
  Make a pdb_context, given a text string.
 *******************************************************************/

NTSTATUS make_pdb_context_string(struct pdb_context **context, const char *selected) 
{
	NTSTATUS ret;
	char **newsel = str_list_make(selected, NULL);
	ret = make_pdb_context_list(context, newsel);
	str_list_free(&newsel);
	return ret;
}

/******************************************************************
 Return an already initialised pdb_context, to facilitate backward 
 compatibility (see functions below).
*******************************************************************/

static struct pdb_context *pdb_get_static_context(BOOL reload) 
{
	static struct pdb_context *pdb_context = NULL;

	if ((pdb_context) && (reload)) {
		pdb_context->free_fn(&pdb_context);
		if (NT_STATUS_IS_ERR(make_pdb_context_list(&pdb_context, lp_passdb_backend()))) {
			return NULL;
		}
	}

	if (!pdb_context) {
		if (NT_STATUS_IS_ERR(make_pdb_context_list(&pdb_context, lp_passdb_backend()))) {
			return NULL;
		}
	}

	return pdb_context;
}

#if !defined(WITH_NISPLUS_SAM)

/******************************************************************
 Backward compatibility functions for the original passdb interface
*******************************************************************/

BOOL pdb_setsampwent(BOOL update) 
{
	struct pdb_context *pdb_context = pdb_get_static_context(False);

	if (!pdb_context) {
		return False;
	}

	return NT_STATUS_IS_OK(pdb_context->pdb_setsampwent(pdb_context, update));
}

void pdb_endsampwent(void) 
{
	struct pdb_context *pdb_context = pdb_get_static_context(False);

	if (!pdb_context) {
		return;
	}

	pdb_context->pdb_endsampwent(pdb_context);
}

BOOL pdb_getsampwent(SAM_ACCOUNT *user) 
{
	struct pdb_context *pdb_context = pdb_get_static_context(False);

	if (!pdb_context) {
		return False;
	}

	return NT_STATUS_IS_OK(pdb_context->pdb_getsampwent(pdb_context, user));
}

BOOL pdb_getsampwnam(SAM_ACCOUNT *sam_acct, const char *username) 
{
	struct pdb_context *pdb_context = pdb_get_static_context(False);

	if (!pdb_context) {
		return False;
	}

	return NT_STATUS_IS_OK(pdb_context->pdb_getsampwnam(pdb_context, sam_acct, username));
}

BOOL pdb_getsampwsid(SAM_ACCOUNT *sam_acct, const DOM_SID *sid) 
{
	struct pdb_context *pdb_context = pdb_get_static_context(False);

	if (!pdb_context) {
		return False;
	}

	return NT_STATUS_IS_OK(pdb_context->pdb_getsampwsid(pdb_context, sam_acct, sid));
}

BOOL pdb_add_sam_account(SAM_ACCOUNT *sam_acct) 
{
	struct pdb_context *pdb_context = pdb_get_static_context(False);

	if (!pdb_context) {
		return False;
	}

	return NT_STATUS_IS_OK(pdb_context->pdb_add_sam_account(pdb_context, sam_acct));
}

BOOL pdb_update_sam_account(SAM_ACCOUNT *sam_acct) 
{
	struct pdb_context *pdb_context = pdb_get_static_context(False);

	if (!pdb_context) {
		return False;
	}

	return NT_STATUS_IS_OK(pdb_context->pdb_update_sam_account(pdb_context, sam_acct));
}

BOOL pdb_delete_sam_account(SAM_ACCOUNT *sam_acct) 
{
	struct pdb_context *pdb_context = pdb_get_static_context(False);

	if (!pdb_context) {
		return False;
	}

	return NT_STATUS_IS_OK(pdb_context->pdb_delete_sam_account(pdb_context, sam_acct));
}

#endif /* !defined(WITH_NISPLUS_SAM) */

/***************************************************************
  Initialize the static context (at smbd startup etc). 

  If uninitialised, context will auto-init on first use.
 ***************************************************************/

BOOL initialize_password_db(BOOL reload)
{	
	return (pdb_get_static_context(reload) != NULL);
}


NTSTATUS make_pdb_methods(TALLOC_CTX *mem_ctx, PDB_METHODS **methods) 
{
	*methods = talloc(mem_ctx, sizeof(struct pdb_methods));

	if (!*methods) {
		return NT_STATUS_NO_MEMORY;
	}

	ZERO_STRUCTP(*methods);

	return NT_STATUS_OK;
}