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
|
/*
Unix SMB/CIFS mplementation.
LDAP protocol helper functions for SAMBA
Copyright (C) Andrew Tridgell 2004
Copyright (C) Volker Lendecke 2004
Copyright (C) Stefan Metzmacher 2004
Copyright (C) Simo Sorce 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"
/****************************************************************************
*
* LDIF parser
*
* Shamelessly stolen and adapted from ldb.
*
***************************************************************************/
/*
pull a ldif chunk, which is defined as a piece of data ending in \n\n or EOF
this routine removes any RFC2849 continuations and comments
caller frees
*/
static char *next_chunk(TALLOC_CTX *mem_ctx,
int (*fgetc_fn)(void *), void *private_data)
{
size_t alloc_size=0, chunk_size = 0;
char *chunk = NULL;
int c;
int in_comment = 0;
while ((c = fgetc_fn(private_data)) != EOF) {
if (chunk_size+1 >= alloc_size) {
char *c2;
alloc_size += 1024;
c2 = talloc_realloc(chunk, alloc_size);
if (!c2) {
errno = ENOMEM;
return NULL;
}
chunk = c2;
}
if (in_comment) {
if (c == '\n') {
in_comment = 0;
}
continue;
}
/* handle continuation lines - see RFC2849 */
if (c == ' ' && chunk_size > 1 &&
chunk[chunk_size-1] == '\n') {
chunk_size--;
continue;
}
/* chunks are terminated by a double line-feed */
if (c == '\n' && chunk_size > 0 &&
chunk[chunk_size-1] == '\n') {
chunk[chunk_size-1] = 0;
return chunk;
}
if (c == '#' &&
(chunk_size == 0 || chunk[chunk_size-1] == '\n')) {
in_comment = 1;
continue;
}
/* ignore leading blank lines */
if (chunk_size == 0 && c == '\n') {
continue;
}
chunk[chunk_size++] = c;
}
if (chunk) {
chunk[chunk_size] = 0;
}
return chunk;
}
/* simple ldif attribute parser */
static int next_attr(char **s, const char **attr, struct ldap_val *value)
{
char *p;
int base64_encoded = 0;
if (strncmp(*s, "-\n", 2) == 0) {
value->length = 0;
*attr = "-";
*s += 2;
return 0;
}
p = strchr(*s, ':');
if (!p) {
return -1;
}
*p++ = 0;
if (*p == ':') {
base64_encoded = 1;
p++;
}
*attr = *s;
while (isspace(*p)) {
p++;
}
value->data = p;
p = strchr(p, '\n');
if (!p) {
value->length = strlen((char *)value->data);
*s = ((char *)value->data) + value->length;
} else {
value->length = p - (char *)value->data;
*s = p+1;
*p = 0;
}
if (base64_encoded) {
DATA_BLOB blob = base64_decode_data_blob(value->data);
memcpy(value->data, blob.data, blob.length);
value->length = blob.length;
((char *)value->data)[value->length] = '\0';
}
return 0;
}
BOOL add_value_to_attrib(TALLOC_CTX *mem_ctx, struct ldap_val *value,
struct ldap_attribute *attrib)
{
attrib->values = talloc_realloc(attrib->values,
sizeof(*attrib->values) *
(attrib->num_values+1));
if (attrib->values == NULL)
return False;
attrib->values[attrib->num_values] =
data_blob_talloc(mem_ctx, value->data, value->length);
attrib->num_values += 1;
return True;
}
BOOL add_attrib_to_array_talloc(TALLOC_CTX *mem_ctx,
const struct ldap_attribute *attrib,
struct ldap_attribute **attribs,
int *num_attribs)
{
*attribs = talloc_realloc(*attribs,
sizeof(**attribs) * (*num_attribs+1));
if (*attribs == NULL)
return False;
(*attribs)[*num_attribs] = *attrib;
*num_attribs += 1;
return True;
}
static BOOL fill_add_attributes(struct ldap_message *msg, char **chunk)
{
struct ldap_AddRequest *r = &msg->r.AddRequest;
const char *attr_name;
struct ldap_val value;
r->num_attributes = 0;
r->attributes = NULL;
while (next_attr(chunk, &attr_name, &value) == 0) {
int i;
struct ldap_attribute *attrib = NULL;
for (i=0; i<r->num_attributes; i++) {
if (strequal(r->attributes[i].name, attr_name)) {
attrib = &r->attributes[i];
break;
}
}
if (attrib == NULL) {
r->attributes = talloc_realloc(r->attributes,
sizeof(*r->attributes) *
(r->num_attributes+1));
if (r->attributes == NULL)
return False;
attrib = &(r->attributes[r->num_attributes]);
r->num_attributes += 1;
ZERO_STRUCTP(attrib);
attrib->name = talloc_strdup(msg->mem_ctx,
attr_name);
}
if (!add_value_to_attrib(msg->mem_ctx, &value, attrib))
return False;
}
return True;
}
BOOL add_mod_to_array_talloc(TALLOC_CTX *mem_ctx,
struct ldap_mod *mod,
struct ldap_mod **mods,
int *num_mods)
{
*mods = talloc_realloc(*mods,
sizeof(**mods) * ((*num_mods)+1));
if (*mods == NULL)
return False;
(*mods)[*num_mods] = *mod;
*num_mods += 1;
return True;
}
static BOOL fill_mods(struct ldap_message *msg, char **chunk)
{
struct ldap_ModifyRequest *r = &msg->r.ModifyRequest;
const char *attr_name;
struct ldap_val value;
r->num_mods = 0;
r->mods = NULL;
while (next_attr(chunk, &attr_name, &value) == 0) {
struct ldap_mod mod;
mod.type = LDAP_MODIFY_NONE;
mod.attrib.name = talloc_strdup(msg->mem_ctx, value.data);
if (strequal(attr_name, "add"))
mod.type = LDAP_MODIFY_ADD;
if (strequal(attr_name, "delete"))
mod.type = LDAP_MODIFY_DELETE;
if (strequal(attr_name, "replace"))
mod.type = LDAP_MODIFY_REPLACE;
if (mod.type == LDAP_MODIFY_NONE) {
DEBUG(2, ("ldif modification type %s unsupported\n",
attr_name));
return False;
}
mod.attrib.num_values = 0;
mod.attrib.values = NULL;
while (next_attr(chunk, &attr_name, &value) == 0) {
if (strequal(attr_name, "-"))
break;
if (!strequal(attr_name, mod.attrib.name)) {
DEBUG(3, ("attrib name %s does not "
"match %s\n", attr_name,
mod.attrib.name));
return False;
}
if (!add_value_to_attrib(msg->mem_ctx, &value,
&mod.attrib)) {
DEBUG(3, ("Could not add value\n"));
return False;
}
}
if (!add_mod_to_array_talloc(msg->mem_ctx, &mod, &r->mods,
&r->num_mods))
return False;
}
return True;
}
/*
read from a LDIF source, creating a ldap_message
*/
static struct ldap_message *ldif_read(int (*fgetc_fn)(void *),
void *private_data)
{
struct ldap_message *msg;
const char *attr=NULL;
const char *dn;
char *chunk=NULL, *s;
struct ldap_val value;
value.data = NULL;
msg = new_ldap_message();
if (msg == NULL)
return NULL;
chunk = next_chunk(msg->mem_ctx, fgetc_fn, private_data);
if (!chunk) {
goto failed;
}
s = chunk;
if (next_attr(&s, &attr, &value) != 0) {
goto failed;
}
/* first line must be a dn */
if (!strequal(attr, "dn")) {
DEBUG(5, ("Error: First line of ldif must be a dn not '%s'\n",
attr));
goto failed;
}
dn = talloc_strdup(msg->mem_ctx, value.data);
if (next_attr(&s, &attr, &value) != 0) {
goto failed;
}
if (!strequal(attr, "changetype")) {
DEBUG(5, ("Error: Second line of ldif must be a changetype "
"not '%s'\n", attr));
goto failed;
}
if (strequal(value.data, "delete")) {
msg->type = LDAP_TAG_DelRequest;
msg->r.DelRequest.dn = dn;
return msg;
}
if (strequal(value.data, "add")) {
msg->type = LDAP_TAG_AddRequest;
msg->r.AddRequest.dn = dn;
if (!fill_add_attributes(msg, &s))
goto failed;
return msg;
}
if (strequal(value.data, "modify")) {
msg->type = LDAP_TAG_ModifyRequest;
msg->r.ModifyRequest.dn = dn;
if (!fill_mods(msg, &s))
goto failed;
return msg;
}
DEBUG(3, ("changetype %s not supported\n", (char *)value.data));
failed:
destroy_ldap_message(msg);
return NULL;
}
/*
a wrapper around ldif_read() for reading from const char*
*/
struct ldif_read_string_state {
const char *s;
};
static int fgetc_string(void *private_data)
{
struct ldif_read_string_state *state = private_data;
if (state->s[0] != 0) {
return *state->s++;
}
return EOF;
}
struct ldap_message *ldap_ldif2msg(const char *s)
{
struct ldif_read_string_state state;
state.s = s;
return ldif_read(fgetc_string, &state);
}
|