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
|
/*
Unix SMB/CIFS implementation.
interface functions for the sam database
Copyright (C) Andrew Tridgell 2004
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"
/*
the way that unix fcntl locking works forces us to have a static ldb
handle here rather than a much more sensible approach of having the
ldb handle as part of the samr_Connect() pipe state. Otherwise we
would try to open the ldb more than once, and tdb would rightly
refuse the second open due to the broken nature of unix locking.
*/
static struct ldb_context *sam_db;
/*
this is used to catch debug messages from ldb
*/
void samdb_debug(void *context, enum ldb_debug_level level, const char *fmt, va_list ap)
{
char *s = NULL;
if (DEBUGLEVEL < 4 && level > LDB_DEBUG_WARNING) {
return;
}
vasprintf(&s, fmt, ap);
if (!s) return;
DEBUG(level, ("samdb: %s\n", s));
free(s);
}
/*
connect to the SAM database
return 0 on success, -1 on failure
*/
int samdb_connect(void)
{
if (sam_db != NULL) {
return 0;
}
sam_db = ldb_connect(lp_sam_url(), 0, NULL);
if (sam_db == NULL) {
return -1;
}
ldb_set_debug(sam_db, samdb_debug, NULL);
return 0;
}
/*
a alloc function for ldb
*/
static void *samdb_alloc(void *context, void *ptr, size_t size)
{
return talloc_realloc((TALLOC_CTX *)context, ptr, size);
}
/*
search the sam for the specified attributes - va_list varient
*/
int samdb_search_v(TALLOC_CTX *mem_ctx,
struct ldb_message ***res,
char * const *attrs,
const char *format,
va_list ap)
{
char *expr = NULL;
int count;
vasprintf(&expr, format, ap);
if (expr == NULL) {
return -1;
}
ldb_set_alloc(sam_db, samdb_alloc, mem_ctx);
count = ldb_search(sam_db, NULL, LDB_SCOPE_SUBTREE, expr, attrs, res);
free(expr);
return count;
}
/*
search the sam for the specified attributes - varargs varient
*/
int samdb_search(TALLOC_CTX *mem_ctx,
struct ldb_message ***res,
char * const *attrs,
const char *format, ...)
{
va_list ap;
int count;
va_start(ap, format);
count = samdb_search_v(mem_ctx, res, attrs, format, ap);
va_end(ap);
return count;
}
/*
free up a search result
*/
int samdb_search_free(TALLOC_CTX *mem_ctx, struct ldb_message **res)
{
ldb_set_alloc(sam_db, samdb_alloc, mem_ctx);
return ldb_search_free(sam_db, res);
}
/*
search the sam for a single string attribute in exactly 1 record
*/
char *samdb_search_string(TALLOC_CTX *mem_ctx,
const char *attr_name,
const char *format, ...)
{
va_list ap;
int count;
char * const attrs[2] = { attr_name, NULL };
struct ldb_message **res = NULL;
char *str = NULL;
va_start(ap, format);
count = samdb_search_v(mem_ctx, &res, attrs, format, ap);
va_end(ap);
if (count == 0) {
return NULL;
}
/* make sure its single valued */
if (count != 1 ||
res[0]->num_elements != 1 ||
res[0]->elements[0].num_values != 1 ||
res[0]->elements[0].values[0].data == NULL) {
DEBUG(1,("samdb: search for %s %s not single valued\n",
attr_name, format));
samdb_search_free(mem_ctx, res);
return NULL;
}
str = talloc_strndup(mem_ctx,
res[0]->elements[0].values[0].data,
res[0]->elements[0].values[0].length);
samdb_search_free(mem_ctx, res);
return str;
}
/*
search the sam for multipe records each giving a single string attribute
return the number of matches, or -1 on error
*/
int samdb_search_string_multiple(TALLOC_CTX *mem_ctx,
char ***strs,
const char *attr_name,
const char *format, ...)
{
va_list ap;
int count, i;
char * const attrs[2] = { attr_name, NULL };
struct ldb_message **res = NULL;
va_start(ap, format);
count = samdb_search_v(mem_ctx, &res, attrs, format, ap);
va_end(ap);
if (count <= 0) {
return count;
}
/* make sure its single valued */
for (i=0;i<count;i++) {
if (res[i]->num_elements != 1 ||
res[i]->elements[0].num_values != 1 ||
res[i]->elements[0].values[0].data == NULL) {
DEBUG(1,("samdb: search for %s %s not single valued\n",
attr_name, format));
samdb_search_free(mem_ctx, res);
return -1;
}
}
*strs = talloc_array_p(mem_ctx, char *, count+1);
if (! *strs) {
samdb_search_free(mem_ctx, res);
return -1;
}
for (i=0;i<count;i++) {
(*strs)[i] = talloc_strndup(mem_ctx,
res[i]->elements[0].values[0].data,
res[i]->elements[0].values[0].length);
}
(*strs)[count] = NULL;
samdb_search_free(mem_ctx, res);
return count;
}
/*
pull a uint from a result set.
*/
uint_t samdb_result_uint(struct ldb_message *msg, const char *attr, uint_t default_value)
{
return ldb_msg_find_uint(msg, attr, default_value);
}
|
