summaryrefslogtreecommitdiff
path: root/source3/passdb/passdb.c
blob: b80ab625edfd0e2cbb9ab98306ec6b6b30929bbd (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
/* 
   Unix SMB/Netbios implementation.
   Version 1.9.
   Password and authentication handling
   Copyright (C) Jeremy Allison 1996-1998
   Copyright (C) Luke Kenneth Casson Leighton 1996-1998
      
   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"
#include "nterr.h"

extern int DEBUGLEVEL;
extern DOM_SID global_sam_sid;

/*
 * NOTE. All these functions are abstracted into a structure
 * that points to the correct function for the selected database. JRA.
 *
 * NOTE.  for the get/mod/add functions, there are two sets of functions.
 * one supports struct sam_passwd, the other supports struct smb_passwd.
 * for speed optimisation it is best to support both these sets.
 * 
 * it is, however, optional to support one set but not the other: there
 * is conversion-capability built in to passdb.c, and run-time error
 * detection for when neither are supported.
 * 
 * password database writers are recommended to implement the sam_passwd
 * functions in a first pass, as struct sam_passwd contains more
 * information, needed by the NT Domain support.
 * 
 * an API writer is expected to create either one set (struct smb_passwd) or
 * the other (struct sam_passwd) OR both, and optionally also to write display
 * info routines * (struct sam_disp_info).  functions which the API writer
 * chooses NOT to write must be wrapped in conversion functions (pwdb_x_to_y)
 * such that API users can call any function and still get valid results.
 *
 * the password API does NOT fill in the gaps if you set an API function
 * to NULL: it will deliberately attempt to call the NULL function.
 *
 */

static struct smb_passdb_ops *pwdb_ops;

/***************************************************************
 Initialise the password db operations.
***************************************************************/

BOOL initialise_password_db(void)
{
  if (pwdb_ops)
  {
    return True;
  }

#ifdef WITH_NISPLUS
  pwdb_ops =  nisplus_initialise_password_db();
#elif defined(WITH_LDAP)
  pwdb_ops = ldap_initialise_password_db();
#elif defined(USE_SMBPASS_DB)
  pwdb_ops = file_initialise_password_db();
#endif 

  return (pwdb_ops != NULL);
}

/*
 * Functions that return/manipulate a struct smb_passwd.
 */

/************************************************************************
 Utility function to search smb passwd by uid.  use this if your database
 does not have search facilities.
*************************************************************************/

struct smb_passwd *iterate_getsmbpwuid(uid_t unix_uid)
{
	struct smb_passwd *pwd = NULL;
	void *fp = NULL;

	DEBUG(10, ("search by unix_uid: %x\n", (int)unix_uid));

	/* Open the smb password database - not for update. */
	fp = startsmbpwent(False);

	if (fp == NULL)
	{
		DEBUG(0, ("unable to open smb password database.\n"));
		return NULL;
	}

	while ((pwd = getsmbpwent(fp)) != NULL && pwd->unix_uid != unix_uid)
	{
	}

	if (pwd != NULL)
	{
		DEBUG(10, ("found by unix_uid: %x\n", (int)unix_uid));
	}

	endsmbpwent(fp);
	return pwd;
}

/************************************************************************
 Utility function to search smb passwd by name.  use this if your database
 does not have search facilities.
*************************************************************************/

struct smb_passwd *iterate_getsmbpwnam(const char *name)
{
	struct smb_passwd *pwd = NULL;
	void *fp = NULL;

	DEBUG(10, ("search by name: %s\n", name));

	/* Open the sam password file - not for update. */
	fp = startsmbpwent(False);

	if (fp == NULL)
	{
		DEBUG(0, ("unable to open smb password database.\n"));
		return NULL;
	}

	while ((pwd = getsmbpwent(fp)) != NULL && !strequal(pwd->unix_name, name))
	{
		DEBUG(10, ("iterate: %s 0x%x\n", pwd->unix_name, pwd->unix_uid));
	}

	if (pwd != NULL)
	{
		DEBUG(10, ("found by name: %s\n", name));
	}

	endsmbpwent(fp);
	return pwd;
}

/***************************************************************
 Start to enumerate the smb or sam passwd list. Returns a void pointer
 to ensure no modification outside this module.

 Note that currently it is being assumed that a pointer returned
 from this function may be used to enumerate struct sam_passwd
 entries as well as struct smb_passwd entries. This may need
 to change. JRA.

****************************************************************/

void *startsmbpwent(BOOL update)
{
  return pwdb_ops->startsmbpwent(update);
}

/***************************************************************
 End enumeration of the smb or sam passwd list.

 Note that currently it is being assumed that a pointer returned
 from this function may be used to enumerate struct sam_passwd
 entries as well as struct smb_passwd entries. This may need
 to change. JRA.

****************************************************************/

void endsmbpwent(void *vp)
{
  pwdb_ops->endsmbpwent(vp);
}

SMB_BIG_UINT getsmbpwpos(void *vp)
{
  return pwdb_ops->getsmbpwpos(vp);
}

BOOL setsmbpwpos(void *vp, SMB_BIG_UINT tok)
{
  return pwdb_ops->setsmbpwpos(vp, tok);
}

/*************************************************************************
 Routine to return the next entry in the smb passwd list.
 *************************************************************************/

struct smb_passwd *getsmbpwent(void *vp)
{
	return pwdb_smb_map_names(pwdb_ops->getsmbpwent(vp));
}

/************************************************************************
 Routine to add an entry to the smb passwd file.
*************************************************************************/

BOOL add_smbpwd_entry(struct smb_passwd *newpwd)
{
 	return pwdb_ops->add_smbpwd_entry(pwdb_smb_map_names(newpwd));
}

/************************************************************************
 Routine to search the smb passwd file for an entry matching the username.
 and then modify its password entry. We can't use the startsampwent()/
 getsampwent()/endsampwent() interfaces here as we depend on looking
 in the actual file to decide how much room we have to write data.
 override = False, normal
 override = True, override XXXXXXXX'd out password or NO PASS
************************************************************************/

BOOL mod_smbpwd_entry(struct smb_passwd* pwd, BOOL override)
{
 	return pwdb_ops->mod_smbpwd_entry(pwdb_smb_map_names(pwd), override);
}

/************************************************************************
 Routine to search smb passwd by name.
*************************************************************************/

struct smb_passwd *getsmbpwnam(const char *name)
{
	return pwdb_smb_map_names(pwdb_ops->getsmbpwnam(name));
}

/************************************************************************
 Routine to search smb passwd by uid.
*************************************************************************/

struct smb_passwd *getsmbpwuid(uid_t unix_uid)
{
	return pwdb_smb_map_names(pwdb_ops->getsmbpwuid(unix_uid));
}

/*************************************************************
 initialises a struct smb_passwd.
 **************************************************************/
void pwdb_init_smb(struct smb_passwd *user)
{
	if (user == NULL) return;
	bzero(user, sizeof(*user));
	user->pass_last_set_time    = (time_t)-1;
	user->unix_uid = (uid_t)-1;
	user->user_rid = 0xffffffff;
}

/*************************************************************
 fills in missing details.  one set of details _must_ exist.
 **************************************************************/
struct smb_passwd *pwdb_smb_map_names(struct smb_passwd *smb)
{
	DOM_NAME_MAP gmep;
	BOOL found = False;
	DOM_SID sid;
	static fstring unix_name;
	static fstring nt_name;

	DEBUG(10,("pwdb_smb_map_names\n"));

	if (smb == NULL)
	{
		return NULL;
	}

	if (smb->unix_name == NULL && smb->nt_name == NULL &&
	    smb->unix_uid == (uid_t)-1 && smb->user_rid == 0xffffffff)
	{
		return NULL;
	}

	if (!found && smb->unix_name != NULL)
	{
		found = lookupsmbpwnam(smb->unix_name, &gmep);
	}
	if (!found && smb->unix_uid  != (uid_t)-1)
	{
		found = lookupsmbpwuid(smb->unix_uid , &gmep);
	}

	if (!found)
	{
		sid_copy(&sid, &global_sam_sid);
		sid_append_rid(&sid, smb->user_rid);
	}

	if (!found && smb->user_rid != 0xffffffff)
	{
		found = lookupsmbpwsid  (&sid        , &gmep);
	}
	if (!found && smb->nt_name  != NULL)
	{
		found = lookupsmbpwntnam(smb->nt_name, &gmep);
	}

	if (!found)
	{
		return NULL;
	}

	if (!sid_front_equal(&global_sam_sid, &gmep.sid))
	{
		fstring sid_str;
		sid_to_string(sid_str, &gmep.sid);
		DEBUG(0,("UNIX User %s Primary Group is in the wrong domain! %s\n",
		          smb->unix_name, sid_str));
		return NULL;
	}

	fstrcpy(unix_name, gmep.unix_name);
	fstrcpy(nt_name  , gmep.nt_name  );
	if (smb->unix_name == NULL      ) smb->unix_name = unix_name;
	if (smb->nt_name   == NULL      ) smb->nt_name   = nt_name  ;
	if (smb->unix_uid  == (uid_t)-1 ) smb->unix_uid  = (uid_t)gmep.unix_id;
	if (smb->user_rid  == 0xffffffff) sid_split_rid(&gmep.sid, &smb->user_rid);

	return smb;
}