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Default to false(?), at least default to something.
[heimdal.git] / lib / hdb / hdb-ldap.c
blobb20f2c031980caf19ca9c9ef855d100761718087
1 /*
2 * Copyright (c) 1999-2001, 2003, PADL Software Pty Ltd.
3 * Copyright (c) 2004, Andrew Bartlett.
4 * Copyright (c) 2003 - 2008, Kungliga Tekniska Högskolan.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * 3. Neither the name of PADL Software nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include "hdb_locl.h"
36
37 #ifdef OPENLDAP
38
39 #include <lber.h>
40 #include <ldap.h>
41 #include <sys/un.h>
42 #include <hex.h>
43
44 static krb5_error_code LDAP__connect(krb5_context context, HDB *);
45 static krb5_error_code LDAP_close(krb5_context context, HDB *);
46
47 static krb5_error_code
48 LDAP_message2entry(krb5_context context, HDB * db, LDAPMessage * msg,
49 int flags, hdb_entry_ex * ent);
50
51 static const char *default_structural_object = "account";
52 static char *structural_object;
53 static krb5_boolean samba_forwardable;
54
55 struct hdbldapdb {
56 LDAP *h_lp;
57 int h_msgid;
58 char *h_base;
59 char *h_url;
60 char *h_createbase;
61 };
62
63 #define HDB2LDAP(db) (((struct hdbldapdb *)(db)->hdb_db)->h_lp)
64 #define HDB2MSGID(db) (((struct hdbldapdb *)(db)->hdb_db)->h_msgid)
65 #define HDBSETMSGID(db,msgid) \
66 do { ((struct hdbldapdb *)(db)->hdb_db)->h_msgid = msgid; } while(0)
67 #define HDB2BASE(dn) (((struct hdbldapdb *)(db)->hdb_db)->h_base)
68 #define HDB2URL(dn) (((struct hdbldapdb *)(db)->hdb_db)->h_url)
69 #define HDB2CREATE(db) (((struct hdbldapdb *)(db)->hdb_db)->h_createbase)
70
71 /*
72 *
73 */
74
75 static char * krb5kdcentry_attrs[] = {
76 "cn",
77 "createTimestamp",
78 "creatorsName",
79 "krb5EncryptionType",
80 "krb5KDCFlags",
81 "krb5Key",
82 "krb5KeyVersionNumber",
83 "krb5MaxLife",
84 "krb5MaxRenew",
85 "krb5PasswordEnd",
86 "krb5PrincipalName",
87 "krb5PrincipalRealm",
88 "krb5ValidEnd",
89 "krb5ValidStart",
90 "modifiersName",
91 "modifyTimestamp",
92 "objectClass",
93 "sambaAcctFlags",
94 "sambaKickoffTime",
95 "sambaNTPassword",
96 "sambaPwdLastSet",
97 "sambaPwdMustChange",
98 "uid",
99 NULL
100 };
101
102 static char *krb5principal_attrs[] = {
103 "cn",
104 "createTimestamp",
105 "creatorsName",
106 "krb5PrincipalName",
107 "krb5PrincipalRealm",
108 "modifiersName",
109 "modifyTimestamp",
110 "objectClass",
111 "uid",
112 NULL
113 };
114
115 static int
116 LDAP_no_size_limit(krb5_context context, LDAP *lp)
117 {
118 int ret, limit = LDAP_NO_LIMIT;
119
120 ret = ldap_set_option(lp, LDAP_OPT_SIZELIMIT, (const void *)&limit);
121 if (ret != LDAP_SUCCESS) {
122 krb5_set_error_message(context, HDB_ERR_BADVERSION,
123 "ldap_set_option: %s",
124 ldap_err2string(ret));
125 return HDB_ERR_BADVERSION;
126 }
127 return 0;
128 }
129
130 static int
131 check_ldap(krb5_context context, HDB *db, int ret)
132 {
133 switch (ret) {
134 case LDAP_SUCCESS:
135 return 0;
136 case LDAP_SERVER_DOWN:
137 LDAP_close(context, db);
138 return 1;
139 default:
140 return 1;
141 }
142 }
143
144 static krb5_error_code
145 LDAP__setmod(LDAPMod *** modlist, int modop, const char *attribute,
146 int *pIndex)
147 {
148 int cMods;
149
150 if (*modlist == NULL) {
151 *modlist = (LDAPMod **)ber_memcalloc(1, sizeof(LDAPMod *));
152 if (*modlist == NULL)
153 return ENOMEM;
154 }
155
156 for (cMods = 0; (*modlist)[cMods] != NULL; cMods++) {
157 if ((*modlist)[cMods]->mod_op == modop &&
158 strcasecmp((*modlist)[cMods]->mod_type, attribute) == 0) {
159 break;
160 }
161 }
162
163 *pIndex = cMods;
164
165 if ((*modlist)[cMods] == NULL) {
166 LDAPMod *mod;
167
168 *modlist = (LDAPMod **)ber_memrealloc(*modlist,
169 (cMods + 2) * sizeof(LDAPMod *));
170 if (*modlist == NULL)
171 return ENOMEM;
172
173 (*modlist)[cMods] = (LDAPMod *)ber_memalloc(sizeof(LDAPMod));
174 if ((*modlist)[cMods] == NULL)
175 return ENOMEM;
176
177 mod = (*modlist)[cMods];
178 mod->mod_op = modop;
179 mod->mod_type = ber_strdup(attribute);
180 if (mod->mod_type == NULL) {
181 ber_memfree(mod);
182 (*modlist)[cMods] = NULL;
183 return ENOMEM;
184 }
185
186 if (modop & LDAP_MOD_BVALUES) {
187 mod->mod_bvalues = NULL;
188 } else {
189 mod->mod_values = NULL;
190 }
191
192 (*modlist)[cMods + 1] = NULL;
193 }
194
195 return 0;
196 }
197
198 static krb5_error_code
199 LDAP_addmod_len(LDAPMod *** modlist, int modop, const char *attribute,
200 unsigned char *value, size_t len)
201 {
202 krb5_error_code ret;
203 int cMods, i = 0;
204
205 ret = LDAP__setmod(modlist, modop | LDAP_MOD_BVALUES, attribute, &cMods);
206 if (ret)
207 return ret;
208
209 if (value != NULL) {
210 struct berval **bv;
211
212 bv = (*modlist)[cMods]->mod_bvalues;
213 if (bv != NULL) {
214 for (i = 0; bv[i] != NULL; i++)
215 ;
216 bv = ber_memrealloc(bv, (i + 2) * sizeof(*bv));
217 } else
218 bv = ber_memalloc(2 * sizeof(*bv));
219 if (bv == NULL)
220 return ENOMEM;
221
222 (*modlist)[cMods]->mod_bvalues = bv;
223
224 bv[i] = ber_memalloc(sizeof(**bv));;
225 if (bv[i] == NULL)
226 return ENOMEM;
227
228 bv[i]->bv_val = (void *)value;
229 bv[i]->bv_len = len;
230
231 bv[i + 1] = NULL;
232 }
233
234 return 0;
235 }
236
237 static krb5_error_code
238 LDAP_addmod(LDAPMod *** modlist, int modop, const char *attribute,
239 const char *value)
240 {
241 int cMods, i = 0;
242 krb5_error_code ret;
243
244 ret = LDAP__setmod(modlist, modop, attribute, &cMods);
245 if (ret)
246 return ret;
247
248 if (value != NULL) {
249 char **bv;
250
251 bv = (*modlist)[cMods]->mod_values;
252 if (bv != NULL) {
253 for (i = 0; bv[i] != NULL; i++)
254 ;
255 bv = ber_memrealloc(bv, (i + 2) * sizeof(*bv));
256 } else
257 bv = ber_memalloc(2 * sizeof(*bv));
258 if (bv == NULL)
259 return ENOMEM;
260
261 (*modlist)[cMods]->mod_values = bv;
262
263 bv[i] = ber_strdup(value);
264 if (bv[i] == NULL)
265 return ENOMEM;
266
267 bv[i + 1] = NULL;
268 }
269
270 return 0;
271 }
272
273 static krb5_error_code
274 LDAP_addmod_generalized_time(LDAPMod *** mods, int modop,
275 const char *attribute, KerberosTime * time)
276 {
277 char buf[22];
278 struct tm *tm;
279
280 /* XXX not threadsafe */
281 tm = gmtime(time);
282 strftime(buf, sizeof(buf), "%Y%m%d%H%M%SZ", tm);
283
284 return LDAP_addmod(mods, modop, attribute, buf);
285 }
286
287 static krb5_error_code
288 LDAP_addmod_integer(krb5_context context,
289 LDAPMod *** mods, int modop,
290 const char *attribute, unsigned long l)
291 {
292 krb5_error_code ret;
293 char *buf;
294
295 ret = asprintf(&buf, "%ld", l);
296 if (ret < 0) {
297 krb5_set_error_message(context, ENOMEM,
298 "asprintf: out of memory:");
299 return ENOMEM;
300 }
301 ret = LDAP_addmod(mods, modop, attribute, buf);
302 free (buf);
303 return ret;
304 }
305
306 static krb5_error_code
307 LDAP_get_string_value(HDB * db, LDAPMessage * entry,
308 const char *attribute, char **ptr)
309 {
310 struct berval **vals;
311
312 vals = ldap_get_values_len(HDB2LDAP(db), entry, attribute);
313 if (vals == NULL || vals[0] == NULL) {
314 *ptr = NULL;
315 return HDB_ERR_NOENTRY;
316 }
317
318 *ptr = malloc(vals[0]->bv_len + 1);
319 if (*ptr == NULL) {
320 ldap_value_free_len(vals);
321 return ENOMEM;
322 }
323
324 memcpy(*ptr, vals[0]->bv_val, vals[0]->bv_len);
325 (*ptr)[vals[0]->bv_len] = 0;
326
327 ldap_value_free_len(vals);
328
329 return 0;
330 }
331
332 static krb5_error_code
333 LDAP_get_integer_value(HDB * db, LDAPMessage * entry,
334 const char *attribute, int *ptr)
335 {
336 krb5_error_code ret;
337 char *val;
338
339 ret = LDAP_get_string_value(db, entry, attribute, &val);
340 if (ret)
341 return ret;
342 *ptr = atoi(val);
343 free(val);
344 return 0;
345 }
346
347 static krb5_error_code
348 LDAP_get_generalized_time_value(HDB * db, LDAPMessage * entry,
349 const char *attribute, KerberosTime * kt)
350 {
351 char *tmp, *gentime;
352 struct tm tm;
353 int ret;
354
355 *kt = 0;
356
357 ret = LDAP_get_string_value(db, entry, attribute, &gentime);
358 if (ret)
359 return ret;
360
361 tmp = strptime(gentime, "%Y%m%d%H%M%SZ", &tm);
362 if (tmp == NULL) {
363 free(gentime);
364 return HDB_ERR_NOENTRY;
365 }
366
367 free(gentime);
368
369 *kt = timegm(&tm);
370
371 return 0;
372 }
373
374 static int
375 bervalstrcmp(struct berval *v, const char *str)
376 {
377 size_t len = strlen(str);
378 return (v->bv_len == len) && strncasecmp(str, (char *)v->bv_val, len) == 0;
379 }
380
381
382 static krb5_error_code
383 LDAP_entry2mods(krb5_context context, HDB * db, hdb_entry_ex * ent,
384 LDAPMessage * msg, LDAPMod *** pmods)
385 {
386 krb5_error_code ret;
387 krb5_boolean is_new_entry;
388 char *tmp = NULL;
389 LDAPMod **mods = NULL;
390 hdb_entry_ex orig;
391 unsigned long oflags, nflags;
392 int i;
393
394 krb5_boolean is_samba_account = FALSE;
395 krb5_boolean is_account = FALSE;
396 krb5_boolean is_heimdal_entry = FALSE;
397 krb5_boolean is_heimdal_principal = FALSE;
398
399 struct berval **vals;
400
401 *pmods = NULL;
402
403 if (msg != NULL) {
404
405 ret = LDAP_message2entry(context, db, msg, 0, &orig);
406 if (ret)
407 goto out;
408
409 is_new_entry = FALSE;
410
411 vals = ldap_get_values_len(HDB2LDAP(db), msg, "objectClass");
412 if (vals) {
413 int num_objectclasses = ldap_count_values_len(vals);
414 for (i=0; i < num_objectclasses; i++) {
415 if (bervalstrcmp(vals[i], "sambaSamAccount"))
416 is_samba_account = TRUE;
417 else if (bervalstrcmp(vals[i], structural_object))
418 is_account = TRUE;
419 else if (bervalstrcmp(vals[i], "krb5Principal"))
420 is_heimdal_principal = TRUE;
421 else if (bervalstrcmp(vals[i], "krb5KDCEntry"))
422 is_heimdal_entry = TRUE;
423 }
424 ldap_value_free_len(vals);
425 }
426
427 /*
428 * If this is just a "account" entry and no other objectclass
429 * is hanging on this entry, it's really a new entry.
430 */
431 if (is_samba_account == FALSE && is_heimdal_principal == FALSE &&
432 is_heimdal_entry == FALSE) {
433 if (is_account == TRUE) {
434 is_new_entry = TRUE;
435 } else {
436 ret = HDB_ERR_NOENTRY;
437 goto out;
438 }
439 }
440 } else
441 is_new_entry = TRUE;
442
443 if (is_new_entry) {
444
445 /* to make it perfectly obvious we're depending on
446 * orig being intiialized to zero */
447 memset(&orig, 0, sizeof(orig));
448
449 ret = LDAP_addmod(&mods, LDAP_MOD_ADD, "objectClass", "top");
450 if (ret)
451 goto out;
452
453 /* account is the structural object class */
454 if (is_account == FALSE) {
455 ret = LDAP_addmod(&mods, LDAP_MOD_ADD, "objectClass",
456 structural_object);
457 is_account = TRUE;
458 if (ret)
459 goto out;
460 }
461
462 ret = LDAP_addmod(&mods, LDAP_MOD_ADD, "objectClass", "krb5Principal");
463 is_heimdal_principal = TRUE;
464 if (ret)
465 goto out;
466
467 ret = LDAP_addmod(&mods, LDAP_MOD_ADD, "objectClass", "krb5KDCEntry");
468 is_heimdal_entry = TRUE;
469 if (ret)
470 goto out;
471 }
472
473 if (is_new_entry ||
474 krb5_principal_compare(context, ent->entry.principal, orig.entry.principal)
475 == FALSE)
476 {
477 if (is_heimdal_principal || is_heimdal_entry) {
478
479 ret = krb5_unparse_name(context, ent->entry.principal, &tmp);
480 if (ret)
481 goto out;
482
483 ret = LDAP_addmod(&mods, LDAP_MOD_REPLACE,
484 "krb5PrincipalName", tmp);
485 if (ret) {
486 free(tmp);
487 goto out;
488 }
489 free(tmp);
490 }
491
492 if (is_account || is_samba_account) {
493 ret = krb5_unparse_name_short(context, ent->entry.principal, &tmp);
494 if (ret)
495 goto out;
496 ret = LDAP_addmod(&mods, LDAP_MOD_REPLACE, "uid", tmp);
497 if (ret) {
498 free(tmp);
499 goto out;
500 }
501 free(tmp);
502 }
503 }
504
505 if (is_heimdal_entry && (ent->entry.kvno != orig.entry.kvno || is_new_entry)) {
506 ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_REPLACE,
507 "krb5KeyVersionNumber",
508 ent->entry.kvno);
509 if (ret)
510 goto out;
511 }
512
513 if (is_heimdal_entry && ent->entry.valid_start) {
514 if (orig.entry.valid_end == NULL
515 || (*(ent->entry.valid_start) != *(orig.entry.valid_start))) {
516 ret = LDAP_addmod_generalized_time(&mods, LDAP_MOD_REPLACE,
517 "krb5ValidStart",
518 ent->entry.valid_start);
519 if (ret)
520 goto out;
521 }
522 }
523
524 if (ent->entry.valid_end) {
525 if (orig.entry.valid_end == NULL || (*(ent->entry.valid_end) != *(orig.entry.valid_end))) {
526 if (is_heimdal_entry) {
527 ret = LDAP_addmod_generalized_time(&mods, LDAP_MOD_REPLACE,
528 "krb5ValidEnd",
529 ent->entry.valid_end);
530 if (ret)
531 goto out;
532 }
533 if (is_samba_account) {
534 ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_REPLACE,
535 "sambaKickoffTime",
536 *(ent->entry.valid_end));
537 if (ret)
538 goto out;
539 }
540 }
541 }
542
543 if (ent->entry.pw_end) {
544 if (orig.entry.pw_end == NULL || (*(ent->entry.pw_end) != *(orig.entry.pw_end))) {
545 if (is_heimdal_entry) {
546 ret = LDAP_addmod_generalized_time(&mods, LDAP_MOD_REPLACE,
547 "krb5PasswordEnd",
548 ent->entry.pw_end);
549 if (ret)
550 goto out;
551 }
552
553 if (is_samba_account) {
554 ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_REPLACE,
555 "sambaPwdMustChange",
556 *(ent->entry.pw_end));
557 if (ret)
558 goto out;
559 }
560 }
561 }
562
563
564 #if 0 /* we we have last_pw_change */
565 if (is_samba_account && ent->entry.last_pw_change) {
566 if (orig.entry.last_pw_change == NULL || (*(ent->entry.last_pw_change) != *(orig.entry.last_pw_change))) {
567 ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_REPLACE,
568 "sambaPwdLastSet",
569 *(ent->entry.last_pw_change));
570 if (ret)
571 goto out;
572 }
573 }
574 #endif
575
576 if (is_heimdal_entry && ent->entry.max_life) {
577 if (orig.entry.max_life == NULL
578 || (*(ent->entry.max_life) != *(orig.entry.max_life))) {
579
580 ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_REPLACE,
581 "krb5MaxLife",
582 *(ent->entry.max_life));
583 if (ret)
584 goto out;
585 }
586 }
587
588 if (is_heimdal_entry && ent->entry.max_renew) {
589 if (orig.entry.max_renew == NULL
590 || (*(ent->entry.max_renew) != *(orig.entry.max_renew))) {
591
592 ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_REPLACE,
593 "krb5MaxRenew",
594 *(ent->entry.max_renew));
595 if (ret)
596 goto out;
597 }
598 }
599
600 oflags = HDBFlags2int(orig.entry.flags);
601 nflags = HDBFlags2int(ent->entry.flags);
602
603 if (is_heimdal_entry && oflags != nflags) {
604
605 ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_REPLACE,
606 "krb5KDCFlags",
607 nflags);
608 if (ret)
609 goto out;
610 }
611
612 /* Remove keys if they exists, and then replace keys. */
613 if (!is_new_entry && orig.entry.keys.len > 0) {
614 vals = ldap_get_values_len(HDB2LDAP(db), msg, "krb5Key");
615 if (vals) {
616 ldap_value_free_len(vals);
617
618 ret = LDAP_addmod(&mods, LDAP_MOD_DELETE, "krb5Key", NULL);
619 if (ret)
620 goto out;
621 }
622 }
623
624 for (i = 0; i < ent->entry.keys.len; i++) {
625
626 if (is_samba_account
627 && ent->entry.keys.val[i].key.keytype == ETYPE_ARCFOUR_HMAC_MD5) {
628 char *ntHexPassword;
629 char *nt;
630 time_t now = time(NULL);
631
632 /* the key might have been 'sealed', but samba passwords
633 are clear in the directory */
634 ret = hdb_unseal_key(context, db, &ent->entry.keys.val[i]);
635 if (ret)
636 goto out;
637
638 nt = ent->entry.keys.val[i].key.keyvalue.data;
639 /* store in ntPassword, not krb5key */
640 ret = hex_encode(nt, 16, &ntHexPassword);
641 if (ret < 0) {
642 ret = ENOMEM;
643 krb5_set_error_message(context, ret, "hdb-ldap: failed to "
644 "hex encode key");
645 goto out;
646 }
647 ret = LDAP_addmod(&mods, LDAP_MOD_REPLACE, "sambaNTPassword",
648 ntHexPassword);
649 free(ntHexPassword);
650 if (ret)
651 goto out;
652 ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_REPLACE,
653 "sambaPwdLastSet", now);
654 if (ret)
655 goto out;
656
657 /* have to kill the LM passwod if it exists */
658 vals = ldap_get_values_len(HDB2LDAP(db), msg, "sambaLMPassword");
659 if (vals) {
660 ldap_value_free_len(vals);
661 ret = LDAP_addmod(&mods, LDAP_MOD_DELETE,
662 "sambaLMPassword", NULL);
663 if (ret)
664 goto out;
665 }
666
667 } else if (is_heimdal_entry) {
668 unsigned char *buf;
669 size_t len, buf_size;
670
671 ASN1_MALLOC_ENCODE(Key, buf, buf_size, &ent->entry.keys.val[i], &len, ret);
672 if (ret)
673 goto out;
674 if(buf_size != len)
675 krb5_abortx(context, "internal error in ASN.1 encoder");
676
677 /* addmod_len _owns_ the key, doesn't need to copy it */
678 ret = LDAP_addmod_len(&mods, LDAP_MOD_ADD, "krb5Key", buf, len);
679 if (ret)
680 goto out;
681 }
682 }
683
684 if (ent->entry.etypes) {
685 int add_krb5EncryptionType = 0;
686
687 /*
688 * Only add/modify krb5EncryptionType if it's a new heimdal
689 * entry or krb5EncryptionType already exists on the entry.
690 */
691
692 if (!is_new_entry) {
693 vals = ldap_get_values_len(HDB2LDAP(db), msg, "krb5EncryptionType");
694 if (vals) {
695 ldap_value_free_len(vals);
696 ret = LDAP_addmod(&mods, LDAP_MOD_DELETE, "krb5EncryptionType",
697 NULL);
698 if (ret)
699 goto out;
700 add_krb5EncryptionType = 1;
701 }
702 } else if (is_heimdal_entry)
703 add_krb5EncryptionType = 1;
704
705 if (add_krb5EncryptionType) {
706 for (i = 0; i < ent->entry.etypes->len; i++) {
707 if (is_samba_account &&
708 ent->entry.keys.val[i].key.keytype == ETYPE_ARCFOUR_HMAC_MD5)
709 {
710 ;
711 } else if (is_heimdal_entry) {
712 ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_ADD,
713 "krb5EncryptionType",
714 ent->entry.etypes->val[i]);
715 if (ret)
716 goto out;
717 }
718 }
719 }
720 }
721
722 /* for clarity */
723 ret = 0;
724
725 out:
726
727 if (ret == 0)
728 *pmods = mods;
729 else if (mods != NULL) {
730 ldap_mods_free(mods, 1);
731 *pmods = NULL;
732 }
733
734 if (msg)
735 hdb_free_entry(context, &orig);
736
737 return ret;
738 }
739
740 static krb5_error_code
741 LDAP_dn2principal(krb5_context context, HDB * db, const char *dn,
742 krb5_principal * principal)
743 {
744 krb5_error_code ret;
745 int rc;
746 const char *filter = "(objectClass=krb5Principal)";
747 LDAPMessage *res = NULL, *e;
748 char *p;
749
750 ret = LDAP_no_size_limit(context, HDB2LDAP(db));
751 if (ret)
752 goto out;
753
754 rc = ldap_search_ext_s(HDB2LDAP(db), dn, LDAP_SCOPE_SUBTREE,
755 filter, krb5principal_attrs, 0,
756 NULL, NULL, NULL,
757 0, &res);
758 if (check_ldap(context, db, rc)) {
759 ret = HDB_ERR_NOENTRY;
760 krb5_set_error_message(context, ret, "ldap_search_ext_s: "
761 "filter: %s error: %s",
762 filter, ldap_err2string(rc));
763 goto out;
764 }
765
766 e = ldap_first_entry(HDB2LDAP(db), res);
767 if (e == NULL) {
768 ret = HDB_ERR_NOENTRY;
769 goto out;
770 }
771
772 ret = LDAP_get_string_value(db, e, "krb5PrincipalName", &p);
773 if (ret) {
774 ret = HDB_ERR_NOENTRY;
775 goto out;
776 }
777
778 ret = krb5_parse_name(context, p, principal);
779 free(p);
780
781 out:
782 if (res)
783 ldap_msgfree(res);
784
785 return ret;
786 }
787
788 static int
789 need_quote(unsigned char c)
790 {
791 return (c & 0x80) ||
792 (c < 32) ||
793 (c == '(') ||
794 (c == ')') ||
795 (c == '*') ||
796 (c == '\\') ||
797 (c == 0x7f);
798 }
799
800 const static char hexchar[] = "0123456789ABCDEF";
801
802 static krb5_error_code
803 escape_value(krb5_context context, const unsigned char *unquoted, char **quoted)
804 {
805 size_t i, len;
806
807 for (i = 0, len = 0; unquoted[i] != '\0'; i++, len++) {
808 if (need_quote((unsigned char)unquoted[i]))
809 len += 2;
810 }
811
812 *quoted = malloc(len + 1);
813 if (*quoted == NULL) {
814 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
815 return ENOMEM;
816 }
817
818 for (i = 0; unquoted[0] ; unquoted++) {
819 if (need_quote((unsigned char *)unquoted[0])) {
820 (*quoted)[i++] = '\\';
821 (*quoted)[i++] = hexchar[(unquoted[0] >> 4) & 0xf];
822 (*quoted)[i++] = hexchar[(unquoted[0] ) & 0xf];
823 } else
824 (*quoted)[i++] = (char)unquoted[0];
825 }
826 (*quoted)[i] = '\0';
827 return 0;
828 }
829
830
831 static krb5_error_code
832 LDAP__lookup_princ(krb5_context context,
833 HDB *db,
834 const char *princname,
835 const char *userid,
836 LDAPMessage **msg)
837 {
838 krb5_error_code ret;
839 int rc;
840 char *quote, *filter = NULL;
841
842 ret = LDAP__connect(context, db);
843 if (ret)
844 return ret;
845
846 /*
847 * Quote searches that contain filter language, this quote
848 * searches for *@REALM, which takes very long time.
849 */
850
851 ret = escape_value(context, princname, &quote);
852 if (ret)
853 goto out;
854
855 rc = asprintf(&filter,
856 "(&(objectClass=krb5Principal)(krb5PrincipalName=%s))",
857 quote);
858 free(quote);
859
860 if (rc < 0) {
861 ret = ENOMEM;
862 krb5_set_error_message(context, ret, "malloc: out of memory");
863 goto out;
864 }
865
866 ret = LDAP_no_size_limit(context, HDB2LDAP(db));
867 if (ret)
868 goto out;
869
870 rc = ldap_search_ext_s(HDB2LDAP(db), HDB2BASE(db),
871 LDAP_SCOPE_SUBTREE, filter,
872 krb5kdcentry_attrs, 0,
873 NULL, NULL, NULL,
874 0, msg);
875 if (check_ldap(context, db, rc)) {
876 ret = HDB_ERR_NOENTRY;
877 krb5_set_error_message(context, ret, "ldap_search_ext_s: "
878 "filter: %s - error: %s",
879 filter, ldap_err2string(rc));
880 goto out;
881 }
882
883 if (userid && ldap_count_entries(HDB2LDAP(db), *msg) == 0) {
884 free(filter);
885 filter = NULL;
886 ldap_msgfree(*msg);
887 *msg = NULL;
888
889 ret = escape_value(context, userid, &quote);
890 if (ret)
891 goto out;
892
893 rc = asprintf(&filter,
894 "(&(|(objectClass=sambaSamAccount)(objectClass=%s))(uid=%s))",
895 structural_object, quote);
896 free(quote);
897 if (rc < 0) {
898 ret = ENOMEM;
899 krb5_set_error_message(context, ret, "asprintf: out of memory");
900 goto out;
901 }
902
903 ret = LDAP_no_size_limit(context, HDB2LDAP(db));
904 if (ret)
905 goto out;
906
907 rc = ldap_search_ext_s(HDB2LDAP(db), HDB2BASE(db), LDAP_SCOPE_SUBTREE,
908 filter, krb5kdcentry_attrs, 0,
909 NULL, NULL, NULL,
910 0, msg);
911 if (check_ldap(context, db, rc)) {
912 ret = HDB_ERR_NOENTRY;
913 krb5_set_error_message(context, ret,
914 "ldap_search_ext_s: filter: %s error: %s",
915 filter, ldap_err2string(rc));
916 goto out;
917 }
918 }
919
920 ret = 0;
921
922 out:
923 if (filter)
924 free(filter);
925
926 return ret;
927 }
928
929 static krb5_error_code
930 LDAP_principal2message(krb5_context context, HDB * db,
931 krb5_const_principal princ, LDAPMessage ** msg)
932 {
933 char *name, *name_short = NULL;
934 krb5_error_code ret;
935 krb5_realm *r, *r0;
936
937 *msg = NULL;
938
939 ret = krb5_unparse_name(context, princ, &name);
940 if (ret)
941 return ret;
942
943 ret = krb5_get_default_realms(context, &r0);
944 if(ret) {
945 free(name);
946 return ret;
947 }
948 for (r = r0; *r != NULL; r++) {
949 if(strcmp(krb5_principal_get_realm(context, princ), *r) == 0) {
950 ret = krb5_unparse_name_short(context, princ, &name_short);
951 if (ret) {
952 krb5_free_host_realm(context, r0);
953 free(name);
954 return ret;
955 }
956 break;
957 }
958 }
959 krb5_free_host_realm(context, r0);
960
961 ret = LDAP__lookup_princ(context, db, name, name_short, msg);
962 free(name);
963 free(name_short);
964
965 return ret;
966 }
967
968 /*
969 * Construct an hdb_entry from a directory entry.
970 */
971 static krb5_error_code
972 LDAP_message2entry(krb5_context context, HDB * db, LDAPMessage * msg,
973 int flags, hdb_entry_ex * ent)
974 {
975 char *unparsed_name = NULL, *dn = NULL, *ntPasswordIN = NULL;
976 char *samba_acct_flags = NULL;
977 struct berval **keys;
978 struct berval **vals;
979 int tmp, tmp_time, i, ret, have_arcfour = 0;
980
981 memset(ent, 0, sizeof(*ent));
982 ent->entry.flags = int2HDBFlags(0);
983
984 ret = LDAP_get_string_value(db, msg, "krb5PrincipalName", &unparsed_name);
985 if (ret == 0) {
986 ret = krb5_parse_name(context, unparsed_name, &ent->entry.principal);
987 if (ret)
988 goto out;
989 } else {
990 ret = LDAP_get_string_value(db, msg, "uid",
991 &unparsed_name);
992 if (ret == 0) {
993 ret = krb5_parse_name(context, unparsed_name, &ent->entry.principal);
994 if (ret)
995 goto out;
996 } else {
997 krb5_set_error_message(context, HDB_ERR_NOENTRY,
998 "hdb-ldap: ldap entry missing"
999 "principal name");
1000 return HDB_ERR_NOENTRY;
1001 }
1002 }
1003
1004 {
1005 int integer;
1006 ret = LDAP_get_integer_value(db, msg, "krb5KeyVersionNumber",
1007 &integer);
1008 if (ret)
1009 ent->entry.kvno = 0;
1010 else
1011 ent->entry.kvno = integer;
1012 }
1013
1014 keys = ldap_get_values_len(HDB2LDAP(db), msg, "krb5Key");
1015 if (keys != NULL) {
1016 int i;
1017 size_t l;
1018
1019 ent->entry.keys.len = ldap_count_values_len(keys);
1020 ent->entry.keys.val = (Key *) calloc(ent->entry.keys.len, sizeof(Key));
1021 if (ent->entry.keys.val == NULL) {
1022 ret = ENOMEM;
1023 krb5_set_error_message(context, ret, "calloc: out of memory");
1024 goto out;
1025 }
1026 for (i = 0; i < ent->entry.keys.len; i++) {
1027 decode_Key((unsigned char *) keys[i]->bv_val,
1028 (size_t) keys[i]->bv_len, &ent->entry.keys.val[i], &l);
1029 }
1030 ber_bvecfree(keys);
1031 } else {
1032 #if 1
1033 /*
1034 * This violates the ASN1 but it allows a principal to
1035 * be related to a general directory entry without creating
1036 * the keys. Hopefully it's OK.
1037 */
1038 ent->entry.keys.len = 0;
1039 ent->entry.keys.val = NULL;
1040 #else
1041 ret = HDB_ERR_NOENTRY;
1042 goto out;
1043 #endif
1044 }
1045
1046 vals = ldap_get_values_len(HDB2LDAP(db), msg, "krb5EncryptionType");
1047 if (vals != NULL) {
1048 int i;
1049
1050 ent->entry.etypes = malloc(sizeof(*(ent->entry.etypes)));
1051 if (ent->entry.etypes == NULL) {
1052 ret = ENOMEM;
1053 krb5_set_error_message(context, ret,"malloc: out of memory");
1054 goto out;
1055 }
1056 ent->entry.etypes->len = ldap_count_values_len(vals);
1057 ent->entry.etypes->val = calloc(ent->entry.etypes->len, sizeof(int));
1058 if (ent->entry.etypes->val == NULL) {
1059 ret = ENOMEM;
1060 krb5_set_error_message(context, ret, "malloc: out of memory");
1061 ent->entry.etypes->len = 0;
1062 goto out;
1063 }
1064 for (i = 0; i < ent->entry.etypes->len; i++) {
1065 char *buf;
1066
1067 buf = malloc(vals[i]->bv_len + 1);
1068 if (buf == NULL) {
1069 ret = ENOMEM;
1070 krb5_set_error_message(context, ret, "malloc: out of memory");
1071 goto out;
1072 }
1073 memcpy(buf, vals[i]->bv_val, vals[i]->bv_len);
1074 buf[vals[i]->bv_len] = '\0';
1075 ent->entry.etypes->val[i] = atoi(buf);
1076 free(buf);
1077 }
1078 ldap_value_free_len(vals);
1079 }
1080
1081 for (i = 0; i < ent->entry.keys.len; i++) {
1082 if (ent->entry.keys.val[i].key.keytype == ETYPE_ARCFOUR_HMAC_MD5) {
1083 have_arcfour = 1;
1084 break;
1085 }
1086 }
1087
1088 /* manually construct the NT (type 23) key */
1089 ret = LDAP_get_string_value(db, msg, "sambaNTPassword", &ntPasswordIN);
1090 if (ret == 0 && have_arcfour == 0) {
1091 unsigned *etypes;
1092 Key *keys;
1093 int i;
1094
1095 keys = realloc(ent->entry.keys.val,
1096 (ent->entry.keys.len + 1) * sizeof(ent->entry.keys.val[0]));
1097 if (keys == NULL) {
1098 free(ntPasswordIN);
1099 ret = ENOMEM;
1100 krb5_set_error_message(context, ret, "malloc: out of memory");
1101 goto out;
1102 }
1103 ent->entry.keys.val = keys;
1104 memset(&ent->entry.keys.val[ent->entry.keys.len], 0, sizeof(Key));
1105 ent->entry.keys.val[ent->entry.keys.len].key.keytype = ETYPE_ARCFOUR_HMAC_MD5;
1106 ret = krb5_data_alloc (&ent->entry.keys.val[ent->entry.keys.len].key.keyvalue, 16);
1107 if (ret) {
1108 krb5_set_error_message(context, ret, "malloc: out of memory");
1109 free(ntPasswordIN);
1110 ret = ENOMEM;
1111 goto out;
1112 }
1113 ret = hex_decode(ntPasswordIN,
1114 ent->entry.keys.val[ent->entry.keys.len].key.keyvalue.data, 16);
1115 ent->entry.keys.len++;
1116
1117 if (ent->entry.etypes == NULL) {
1118 ent->entry.etypes = malloc(sizeof(*(ent->entry.etypes)));
1119 if (ent->entry.etypes == NULL) {
1120 ret = ENOMEM;
1121 krb5_set_error_message(context, ret, "malloc: out of memory");
1122 goto out;
1123 }
1124 ent->entry.etypes->val = NULL;
1125 ent->entry.etypes->len = 0;
1126 }
1127
1128 for (i = 0; i < ent->entry.etypes->len; i++)
1129 if (ent->entry.etypes->val[i] == ETYPE_ARCFOUR_HMAC_MD5)
1130 break;
1131 /* If there is no ARCFOUR enctype, add one */
1132 if (i == ent->entry.etypes->len) {
1133 etypes = realloc(ent->entry.etypes->val,
1134 (ent->entry.etypes->len + 1) *
1135 sizeof(ent->entry.etypes->val[0]));
1136 if (etypes == NULL) {
1137 ret = ENOMEM;
1138 krb5_set_error_message(context, ret, "malloc: out of memory");
1139 goto out;
1140 }
1141 ent->entry.etypes->val = etypes;
1142 ent->entry.etypes->val[ent->entry.etypes->len] =
1143 ETYPE_ARCFOUR_HMAC_MD5;
1144 ent->entry.etypes->len++;
1145 }
1146 }
1147
1148 ret = LDAP_get_generalized_time_value(db, msg, "createTimestamp",
1149 &ent->entry.created_by.time);
1150 if (ret)
1151 ent->entry.created_by.time = time(NULL);
1152
1153 ent->entry.created_by.principal = NULL;
1154
1155 if (flags & HDB_F_ADMIN_DATA) {
1156 ret = LDAP_get_string_value(db, msg, "creatorsName", &dn);
1157 if (ret == 0) {
1158 LDAP_dn2principal(context, db, dn, &ent->entry.created_by.principal);
1159 free(dn);
1160 }
1161
1162 ent->entry.modified_by = calloc(1, sizeof(*ent->entry.modified_by));
1163 if (ent->entry.modified_by == NULL) {
1164 ret = ENOMEM;
1165 krb5_set_error_message(context, ret, "malloc: out of memory");
1166 goto out;
1167 }
1168
1169 ret = LDAP_get_generalized_time_value(db, msg, "modifyTimestamp",
1170 &ent->entry.modified_by->time);
1171 if (ret == 0) {
1172 ret = LDAP_get_string_value(db, msg, "modifiersName", &dn);
1173 if (ret == 0) {
1174 LDAP_dn2principal(context, db, dn, &ent->entry.modified_by->principal);
1175 free(dn);
1176 } else {
1177 free(ent->entry.modified_by);
1178 ent->entry.modified_by = NULL;
1179 }
1180 }
1181 }
1182
1183 ent->entry.valid_start = malloc(sizeof(*ent->entry.valid_start));
1184 if (ent->entry.valid_start == NULL) {
1185 ret = ENOMEM;
1186 krb5_set_error_message(context, ret, "malloc: out of memory");
1187 goto out;
1188 }
1189 ret = LDAP_get_generalized_time_value(db, msg, "krb5ValidStart",
1190 ent->entry.valid_start);
1191 if (ret) {
1192 /* OPTIONAL */
1193 free(ent->entry.valid_start);
1194 ent->entry.valid_start = NULL;
1195 }
1196
1197 ent->entry.valid_end = malloc(sizeof(*ent->entry.valid_end));
1198 if (ent->entry.valid_end == NULL) {
1199 ret = ENOMEM;
1200 krb5_set_error_message(context, ret, "malloc: out of memory");
1201 goto out;
1202 }
1203 ret = LDAP_get_generalized_time_value(db, msg, "krb5ValidEnd",
1204 ent->entry.valid_end);
1205 if (ret) {
1206 /* OPTIONAL */
1207 free(ent->entry.valid_end);
1208 ent->entry.valid_end = NULL;
1209 }
1210
1211 ret = LDAP_get_integer_value(db, msg, "sambaKickoffTime", &tmp_time);
1212 if (ret == 0) {
1213 if (ent->entry.valid_end == NULL) {
1214 ent->entry.valid_end = malloc(sizeof(*ent->entry.valid_end));
1215 if (ent->entry.valid_end == NULL) {
1216 ret = ENOMEM;
1217 krb5_set_error_message(context, ret, "malloc: out of memory");
1218 goto out;
1219 }
1220 }
1221 *ent->entry.valid_end = tmp_time;
1222 }
1223
1224 ent->entry.pw_end = malloc(sizeof(*ent->entry.pw_end));
1225 if (ent->entry.pw_end == NULL) {
1226 ret = ENOMEM;
1227 krb5_set_error_message(context, ret, "malloc: out of memory");
1228 goto out;
1229 }
1230 ret = LDAP_get_generalized_time_value(db, msg, "krb5PasswordEnd",
1231 ent->entry.pw_end);
1232 if (ret) {
1233 /* OPTIONAL */
1234 free(ent->entry.pw_end);
1235 ent->entry.pw_end = NULL;
1236 }
1237
1238 ret = LDAP_get_integer_value(db, msg, "sambaPwdLastSet", &tmp_time);
1239 if (ret == 0) {
1240 time_t delta;
1241
1242 if (ent->entry.pw_end == NULL) {
1243 ent->entry.pw_end = malloc(sizeof(*ent->entry.pw_end));
1244 if (ent->entry.pw_end == NULL) {
1245 ret = ENOMEM;
1246 krb5_set_error_message(context, ret, "malloc: out of memory");
1247 goto out;
1248 }
1249 }
1250
1251 delta = krb5_config_get_time_default(context, NULL,
1252 365 * 24 * 60 * 60,
1253 "kadmin",
1254 "password_lifetime",
1255 NULL);
1256 *ent->entry.pw_end = tmp_time + delta;
1257 }
1258
1259 ret = LDAP_get_integer_value(db, msg, "sambaPwdMustChange", &tmp_time);
1260 if (ret == 0) {
1261 if (ent->entry.pw_end == NULL) {
1262 ent->entry.pw_end = malloc(sizeof(*ent->entry.pw_end));
1263 if (ent->entry.pw_end == NULL) {
1264 ret = ENOMEM;
1265 krb5_set_error_message(context, ret, "malloc: out of memory");
1266 goto out;
1267 }
1268 }
1269 *ent->entry.pw_end = tmp_time;
1270 }
1271
1272 /* OPTIONAL */
1273 ret = LDAP_get_integer_value(db, msg, "sambaPwdLastSet", &tmp_time);
1274 if (ret == 0)
1275 hdb_entry_set_pw_change_time(context, &ent->entry, tmp_time);
1276
1277 {
1278 int max_life;
1279
1280 ent->entry.max_life = malloc(sizeof(*ent->entry.max_life));
1281 if (ent->entry.max_life == NULL) {
1282 ret = ENOMEM;
1283 krb5_set_error_message(context, ret, "malloc: out of memory");
1284 goto out;
1285 }
1286 ret = LDAP_get_integer_value(db, msg, "krb5MaxLife", &max_life);
1287 if (ret) {
1288 free(ent->entry.max_life);
1289 ent->entry.max_life = NULL;
1290 } else
1291 *ent->entry.max_life = max_life;
1292 }
1293
1294 {
1295 int max_renew;
1296
1297 ent->entry.max_renew = malloc(sizeof(*ent->entry.max_renew));
1298 if (ent->entry.max_renew == NULL) {
1299 ret = ENOMEM;
1300 krb5_set_error_message(context, ret, "malloc: out of memory");
1301 goto out;
1302 }
1303 ret = LDAP_get_integer_value(db, msg, "krb5MaxRenew", &max_renew);
1304 if (ret) {
1305 free(ent->entry.max_renew);
1306 ent->entry.max_renew = NULL;
1307 } else
1308 *ent->entry.max_renew = max_renew;
1309 }
1310
1311 ret = LDAP_get_integer_value(db, msg, "krb5KDCFlags", &tmp);
1312 if (ret)
1313 tmp = 0;
1314
1315 ent->entry.flags = int2HDBFlags(tmp);
1316
1317 /* Try and find Samba flags to put into the mix */
1318 ret = LDAP_get_string_value(db, msg, "sambaAcctFlags", &samba_acct_flags);
1319 if (ret == 0) {
1320 /* parse the [UXW...] string:
1321
1322 'N' No password
1323 'D' Disabled
1324 'H' Homedir required
1325 'T' Temp account.
1326 'U' User account (normal)
1327 'M' MNS logon user account - what is this ?
1328 'W' Workstation account
1329 'S' Server account
1330 'L' Locked account
1331 'X' No Xpiry on password
1332 'I' Interdomain trust account
1333
1334 */
1335
1336 int i;
1337 int flags_len = strlen(samba_acct_flags);
1338
1339 if (flags_len < 2)
1340 goto out2;
1341
1342 if (samba_acct_flags[0] != '['
1343 || samba_acct_flags[flags_len - 1] != ']')
1344 goto out2;
1345
1346 /* Allow forwarding */
1347 if (samba_forwardable)
1348 ent->entry.flags.forwardable = TRUE;
1349
1350 for (i=0; i < flags_len; i++) {
1351 switch (samba_acct_flags[i]) {
1352 case ' ':
1353 case '[':
1354 case ']':
1355 break;
1356 case 'N':
1357 /* how to handle no password in kerberos? */
1358 break;
1359 case 'D':
1360 ent->entry.flags.invalid = TRUE;
1361 break;
1362 case 'H':
1363 break;
1364 case 'T':
1365 /* temp duplicate */
1366 ent->entry.flags.invalid = TRUE;
1367 break;
1368 case 'U':
1369 ent->entry.flags.client = TRUE;
1370 break;
1371 case 'M':
1372 break;
1373 case 'W':
1374 case 'S':
1375 ent->entry.flags.server = TRUE;
1376 ent->entry.flags.client = TRUE;
1377 break;
1378 case 'L':
1379 ent->entry.flags.invalid = TRUE;
1380 break;
1381 case 'X':
1382 if (ent->entry.pw_end) {
1383 free(ent->entry.pw_end);
1384 ent->entry.pw_end = NULL;
1385 }
1386 break;
1387 case 'I':
1388 ent->entry.flags.server = TRUE;
1389 ent->entry.flags.client = TRUE;
1390 break;
1391 }
1392 }
1393 out2:
1394 free(samba_acct_flags);
1395 }
1396
1397 ret = 0;
1398
1399 out:
1400 if (unparsed_name)
1401 free(unparsed_name);
1402
1403 if (ret)
1404 hdb_free_entry(context, ent);
1405
1406 return ret;
1407 }
1408
1409 static krb5_error_code
1410 LDAP_close(krb5_context context, HDB * db)
1411 {
1412 if (HDB2LDAP(db)) {
1413 ldap_unbind_ext(HDB2LDAP(db), NULL, NULL);
1414 ((struct hdbldapdb *)db->hdb_db)->h_lp = NULL;
1415 }
1416
1417 return 0;
1418 }
1419
1420 static krb5_error_code
1421 LDAP_lock(krb5_context context, HDB * db, int operation)
1422 {
1423 return 0;
1424 }
1425
1426 static krb5_error_code
1427 LDAP_unlock(krb5_context context, HDB * db)
1428 {
1429 return 0;
1430 }
1431
1432 static krb5_error_code
1433 LDAP_seq(krb5_context context, HDB * db, unsigned flags, hdb_entry_ex * entry)
1434 {
1435 int msgid, rc, parserc;
1436 krb5_error_code ret;
1437 LDAPMessage *e;
1438
1439 msgid = HDB2MSGID(db);
1440 if (msgid < 0)
1441 return HDB_ERR_NOENTRY;
1442
1443 do {
1444 rc = ldap_result(HDB2LDAP(db), msgid, LDAP_MSG_ONE, NULL, &e);
1445 switch (rc) {
1446 case LDAP_RES_SEARCH_REFERENCE:
1447 ldap_msgfree(e);
1448 ret = 0;
1449 break;
1450 case LDAP_RES_SEARCH_ENTRY:
1451 /* We have an entry. Parse it. */
1452 ret = LDAP_message2entry(context, db, e, flags, entry);
1453 ldap_msgfree(e);
1454 break;
1455 case LDAP_RES_SEARCH_RESULT:
1456 /* We're probably at the end of the results. If not, abandon. */
1457 parserc =
1458 ldap_parse_result(HDB2LDAP(db), e, NULL, NULL, NULL,
1459 NULL, NULL, 1);
1460 ret = HDB_ERR_NOENTRY;
1461 if (parserc != LDAP_SUCCESS
1462 && parserc != LDAP_MORE_RESULTS_TO_RETURN) {
1463 krb5_set_error_message(context, ret, "ldap_parse_result: %s",
1464 ldap_err2string(parserc));
1465 ldap_abandon_ext(HDB2LDAP(db), msgid, NULL, NULL);
1466 }
1467 HDBSETMSGID(db, -1);
1468 break;
1469 case LDAP_SERVER_DOWN:
1470 ldap_msgfree(e);
1471 LDAP_close(context, db);
1472 HDBSETMSGID(db, -1);
1473 ret = ENETDOWN;
1474 break;
1475 default:
1476 /* Some unspecified error (timeout?). Abandon. */
1477 ldap_msgfree(e);
1478 ldap_abandon_ext(HDB2LDAP(db), msgid, NULL, NULL);
1479 ret = HDB_ERR_NOENTRY;
1480 HDBSETMSGID(db, -1);
1481 break;
1482 }
1483 } while (rc == LDAP_RES_SEARCH_REFERENCE);
1484
1485 if (ret == 0) {
1486 if (db->hdb_master_key_set && (flags & HDB_F_DECRYPT)) {
1487 ret = hdb_unseal_keys(context, db, &entry->entry);
1488 if (ret)
1489 hdb_free_entry(context, entry);
1490 }
1491 }
1492
1493 return ret;
1494 }
1495
1496 static krb5_error_code
1497 LDAP_firstkey(krb5_context context, HDB *db, unsigned flags,
1498 hdb_entry_ex *entry)
1499 {
1500 krb5_error_code ret;
1501 int msgid;
1502
1503 ret = LDAP__connect(context, db);
1504 if (ret)
1505 return ret;
1506
1507 ret = LDAP_no_size_limit(context, HDB2LDAP(db));
1508 if (ret)
1509 return ret;
1510
1511 ret = ldap_search_ext(HDB2LDAP(db), HDB2BASE(db),
1512 LDAP_SCOPE_SUBTREE,
1513 "(|(objectClass=krb5Principal)(objectClass=sambaSamAccount))",
1514 krb5kdcentry_attrs, 0,
1515 NULL, NULL, NULL, 0, &msgid);
1516 if (msgid < 0)
1517 return HDB_ERR_NOENTRY;
1518
1519 HDBSETMSGID(db, msgid);
1520
1521 return LDAP_seq(context, db, flags, entry);
1522 }
1523
1524 static krb5_error_code
1525 LDAP_nextkey(krb5_context context, HDB * db, unsigned flags,
1526 hdb_entry_ex * entry)
1527 {
1528 return LDAP_seq(context, db, flags, entry);
1529 }
1530
1531 static krb5_error_code
1532 LDAP__connect(krb5_context context, HDB * db)
1533 {
1534 int rc, version = LDAP_VERSION3;
1535 /*
1536 * Empty credentials to do a SASL bind with LDAP. Note that empty
1537 * different from NULL credentials. If you provide NULL
1538 * credentials instead of empty credentials you will get a SASL
1539 * bind in progress message.
1540 */
1541 struct berval bv = { 0, "" };
1542
1543 if (HDB2LDAP(db)) {
1544 /* connection has been opened. ping server. */
1545 struct sockaddr_un addr;
1546 socklen_t len = sizeof(addr);
1547 int sd;
1548
1549 if (ldap_get_option(HDB2LDAP(db), LDAP_OPT_DESC, &sd) == 0 &&
1550 getpeername(sd, (struct sockaddr *) &addr, &len) < 0) {
1551 /* the other end has died. reopen. */
1552 LDAP_close(context, db);
1553 }
1554 }
1555
1556 if (HDB2LDAP(db) != NULL) /* server is UP */
1557 return 0;
1558
1559 rc = ldap_initialize(&((struct hdbldapdb *)db->hdb_db)->h_lp, HDB2URL(db));
1560 if (rc != LDAP_SUCCESS) {
1561 krb5_set_error_message(context, HDB_ERR_NOENTRY, "ldap_initialize: %s",
1562 ldap_err2string(rc));
1563 return HDB_ERR_NOENTRY;
1564 }
1565
1566 rc = ldap_set_option(HDB2LDAP(db), LDAP_OPT_PROTOCOL_VERSION,
1567 (const void *)&version);
1568 if (rc != LDAP_SUCCESS) {
1569 krb5_set_error_message(context, HDB_ERR_BADVERSION,
1570 "ldap_set_option: %s", ldap_err2string(rc));
1571 LDAP_close(context, db);
1572 return HDB_ERR_BADVERSION;
1573 }
1574
1575 rc = ldap_sasl_bind_s(HDB2LDAP(db), NULL, "EXTERNAL", &bv,
1576 NULL, NULL, NULL);
1577 if (rc != LDAP_SUCCESS) {
1578 krb5_set_error_message(context, HDB_ERR_BADVERSION,
1579 "ldap_sasl_bind_s: %s", ldap_err2string(rc));
1580 LDAP_close(context, db);
1581 return HDB_ERR_BADVERSION;
1582 }
1583
1584 return 0;
1585 }
1586
1587 static krb5_error_code
1588 LDAP_open(krb5_context context, HDB * db, int flags, mode_t mode)
1589 {
1590 /* Not the right place for this. */
1591 #ifdef HAVE_SIGACTION
1592 struct sigaction sa;
1593
1594 sa.sa_flags = 0;
1595 sa.sa_handler = SIG_IGN;
1596 sigemptyset(&sa.sa_mask);
1597
1598 sigaction(SIGPIPE, &sa, NULL);
1599 #else
1600 signal(SIGPIPE, SIG_IGN);
1601 #endif /* HAVE_SIGACTION */
1602
1603 return LDAP__connect(context, db);
1604 }
1605
1606 static krb5_error_code
1607 LDAP_fetch_kvno(krb5_context context, HDB * db, krb5_const_principal principal,
1608 unsigned flags, krb5_kvno kvno, hdb_entry_ex * entry)
1609 {
1610 LDAPMessage *msg, *e;
1611 krb5_error_code ret;
1612
1613 ret = LDAP_principal2message(context, db, principal, &msg);
1614 if (ret)
1615 return ret;
1616
1617 e = ldap_first_entry(HDB2LDAP(db), msg);
1618 if (e == NULL) {
1619 ret = HDB_ERR_NOENTRY;
1620 goto out;
1621 }
1622
1623 ret = LDAP_message2entry(context, db, e, flags, entry);
1624 if (ret == 0) {
1625 if (db->hdb_master_key_set && (flags & HDB_F_DECRYPT)) {
1626 ret = hdb_unseal_keys(context, db, &entry->entry);
1627 if (ret)
1628 hdb_free_entry(context, entry);
1629 }
1630 }
1631
1632 out:
1633 ldap_msgfree(msg);
1634
1635 return ret;
1636 }
1637
1638 static krb5_error_code
1639 LDAP_fetch(krb5_context context, HDB * db, krb5_const_principal principal,
1640 unsigned flags, hdb_entry_ex * entry)
1641 {
1642 return LDAP_fetch_kvno(context, db, principal,
1643 flags & (~HDB_F_KVNO_SPECIFIED), 0, entry);
1644 }
1645
1646 static krb5_error_code
1647 LDAP_store(krb5_context context, HDB * db, unsigned flags,
1648 hdb_entry_ex * entry)
1649 {
1650 LDAPMod **mods = NULL;
1651 krb5_error_code ret;
1652 const char *errfn;
1653 int rc;
1654 LDAPMessage *msg = NULL, *e = NULL;
1655 char *dn = NULL, *name = NULL;
1656
1657 ret = LDAP_principal2message(context, db, entry->entry.principal, &msg);
1658 if (ret == 0)
1659 e = ldap_first_entry(HDB2LDAP(db), msg);
1660
1661 ret = krb5_unparse_name(context, entry->entry.principal, &name);
1662 if (ret) {
1663 free(name);
1664 return ret;
1665 }
1666
1667 ret = hdb_seal_keys(context, db, &entry->entry);
1668 if (ret)
1669 goto out;
1670
1671 /* turn new entry into LDAPMod array */
1672 ret = LDAP_entry2mods(context, db, entry, e, &mods);
1673 if (ret)
1674 goto out;
1675
1676 if (e == NULL) {
1677 ret = asprintf(&dn, "krb5PrincipalName=%s,%s", name, HDB2CREATE(db));
1678 if (ret < 0) {
1679 ret = ENOMEM;
1680 krb5_set_error_message(context, ret, "asprintf: out of memory");
1681 goto out;
1682 }
1683 } else if (flags & HDB_F_REPLACE) {
1684 /* Entry exists, and we're allowed to replace it. */
1685 dn = ldap_get_dn(HDB2LDAP(db), e);
1686 } else {
1687 /* Entry exists, but we're not allowed to replace it. Bail. */
1688 ret = HDB_ERR_EXISTS;
1689 goto out;
1690 }
1691
1692 /* write entry into directory */
1693 if (e == NULL) {
1694 /* didn't exist before */
1695 rc = ldap_add_ext_s(HDB2LDAP(db), dn, mods, NULL, NULL );
1696 errfn = "ldap_add_ext_s";
1697 } else {
1698 /* already existed, send deltas only */
1699 rc = ldap_modify_ext_s(HDB2LDAP(db), dn, mods, NULL, NULL );
1700 errfn = "ldap_modify_ext_s";
1701 }
1702
1703 if (check_ldap(context, db, rc)) {
1704 char *ld_error = NULL;
1705 ldap_get_option(HDB2LDAP(db), LDAP_OPT_ERROR_STRING,
1706 &ld_error);
1707 ret = HDB_ERR_CANT_LOCK_DB;
1708 krb5_set_error_message(context, ret, "%s: %s (DN=%s) %s: %s",
1709 errfn, name, dn, ldap_err2string(rc), ld_error);
1710 } else
1711 ret = 0;
1712
1713 out:
1714 /* free stuff */
1715 if (dn)
1716 free(dn);
1717 if (msg)
1718 ldap_msgfree(msg);
1719 if (mods)
1720 ldap_mods_free(mods, 1);
1721 if (name)
1722 free(name);
1723
1724 return ret;
1725 }
1726
1727 static krb5_error_code
1728 LDAP_remove(krb5_context context, HDB *db, krb5_const_principal principal)
1729 {
1730 krb5_error_code ret;
1731 LDAPMessage *msg, *e;
1732 char *dn = NULL;
1733 int rc, limit = LDAP_NO_LIMIT;
1734
1735 ret = LDAP_principal2message(context, db, principal, &msg);
1736 if (ret)
1737 goto out;
1738
1739 e = ldap_first_entry(HDB2LDAP(db), msg);
1740 if (e == NULL) {
1741 ret = HDB_ERR_NOENTRY;
1742 goto out;
1743 }
1744
1745 dn = ldap_get_dn(HDB2LDAP(db), e);
1746 if (dn == NULL) {
1747 ret = HDB_ERR_NOENTRY;
1748 goto out;
1749 }
1750
1751 rc = ldap_set_option(HDB2LDAP(db), LDAP_OPT_SIZELIMIT, (const void *)&limit);
1752 if (rc != LDAP_SUCCESS) {
1753 ret = HDB_ERR_BADVERSION;
1754 krb5_set_error_message(context, ret, "ldap_set_option: %s",
1755 ldap_err2string(rc));
1756 goto out;
1757 }
1758
1759 rc = ldap_delete_ext_s(HDB2LDAP(db), dn, NULL, NULL );
1760 if (check_ldap(context, db, rc)) {
1761 ret = HDB_ERR_CANT_LOCK_DB;
1762 krb5_set_error_message(context, ret, "ldap_delete_ext_s: %s",
1763 ldap_err2string(rc));
1764 } else
1765 ret = 0;
1766
1767 out:
1768 if (dn != NULL)
1769 free(dn);
1770 if (msg != NULL)
1771 ldap_msgfree(msg);
1772
1773 return ret;
1774 }
1775
1776 static krb5_error_code
1777 LDAP_destroy(krb5_context context, HDB * db)
1778 {
1779 krb5_error_code ret;
1780
1781 LDAP_close(context, db);
1782
1783 ret = hdb_clear_master_key(context, db);
1784 if (HDB2BASE(db))
1785 free(HDB2BASE(db));
1786 if (HDB2CREATE(db))
1787 free(HDB2CREATE(db));
1788 if (HDB2URL(db))
1789 free(HDB2URL(db));
1790 if (db->hdb_name)
1791 free(db->hdb_name);
1792 free(db->hdb_db);
1793 free(db);
1794
1795 return ret;
1796 }
1797
1798 static krb5_error_code
1799 hdb_ldap_common(krb5_context context,
1800 HDB ** db,
1801 const char *search_base,
1802 const char *url)
1803 {
1804 struct hdbldapdb *h;
1805 const char *create_base = NULL;
1806
1807 if (search_base == NULL && search_base[0] == '\0') {
1808 krb5_set_error_message(context, ENOMEM, "ldap search base not configured");
1809 return ENOMEM; /* XXX */
1810 }
1811
1812 if (structural_object == NULL) {
1813 const char *p;
1814
1815 p = krb5_config_get_string(context, NULL, "kdc",
1816 "hdb-ldap-structural-object", NULL);
1817 if (p == NULL)
1818 p = default_structural_object;
1819 structural_object = strdup(p);
1820 if (structural_object == NULL) {
1821 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
1822 return ENOMEM;
1823 }
1824 }
1825
1826 samba_forwardable =
1827 krb5_config_get_bool_default(context, NULL, TRUE,
1828 "kdc", "hdb-samba-forwardable", NULL);
1829
1830 *db = calloc(1, sizeof(**db));
1831 if (*db == NULL) {
1832 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
1833 return ENOMEM;
1834 }
1835 memset(*db, 0, sizeof(**db));
1836
1837 h = calloc(1, sizeof(*h));
1838 if (h == NULL) {
1839 free(*db);
1840 *db = NULL;
1841 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
1842 return ENOMEM;
1843 }
1844 (*db)->hdb_db = h;
1845
1846 /* XXX */
1847 if (asprintf(&(*db)->hdb_name, "ldap:%s", search_base) == -1) {
1848 LDAP_destroy(context, *db);
1849 *db = NULL;
1850 krb5_set_error_message(context, ENOMEM, "strdup: out of memory");
1851 return ENOMEM;
1852 }
1853
1854 h->h_url = strdup(url);
1855 h->h_base = strdup(search_base);
1856 if (h->h_url == NULL || h->h_base == NULL) {
1857 LDAP_destroy(context, *db);
1858 *db = NULL;
1859 krb5_set_error_message(context, ENOMEM, "strdup: out of memory");
1860 return ENOMEM;
1861 }
1862
1863 create_base = krb5_config_get_string(context, NULL, "kdc",
1864 "hdb-ldap-create-base", NULL);
1865 if (create_base == NULL)
1866 create_base = h->h_base;
1867
1868 h->h_createbase = strdup(create_base);
1869 if (h->h_createbase == NULL) {
1870 LDAP_destroy(context, *db);
1871 *db = NULL;
1872 krb5_set_error_message(context, ENOMEM, "strdup: out of memory");
1873 return ENOMEM;
1874 }
1875
1876 (*db)->hdb_master_key_set = 0;
1877 (*db)->hdb_openp = 0;
1878 (*db)->hdb_capability_flags = 0;
1879 (*db)->hdb_open = LDAP_open;
1880 (*db)->hdb_close = LDAP_close;
1881 (*db)->hdb_fetch_kvno = LDAP_fetch_kvno;
1882 (*db)->hdb_store = LDAP_store;
1883 (*db)->hdb_remove = LDAP_remove;
1884 (*db)->hdb_firstkey = LDAP_firstkey;
1885 (*db)->hdb_nextkey = LDAP_nextkey;
1886 (*db)->hdb_lock = LDAP_lock;
1887 (*db)->hdb_unlock = LDAP_unlock;
1888 (*db)->hdb_rename = NULL;
1889 (*db)->hdb__get = NULL;
1890 (*db)->hdb__put = NULL;
1891 (*db)->hdb__del = NULL;
1892 (*db)->hdb_destroy = LDAP_destroy;
1893
1894 return 0;
1895 }
1896
1897 krb5_error_code
1898 hdb_ldap_create(krb5_context context, HDB ** db, const char *arg)
1899 {
1900 return hdb_ldap_common(context, db, arg, "ldapi:///");
1901 }
1902
1903 krb5_error_code
1904 hdb_ldapi_create(krb5_context context, HDB ** db, const char *arg)
1905 {
1906 krb5_error_code ret;
1907 char *search_base, *p;
1908
1909 asprintf(&p, "ldapi:%s", arg);
1910 if (p == NULL) {
1911 *db = NULL;
1912 krb5_set_error_message(context, ENOMEM, "out of memory");
1913 return ENOMEM;
1914 }
1915 search_base = strchr(p + strlen("ldapi://"), ':');
1916 if (search_base == NULL) {
1917 *db = NULL;
1918 krb5_set_error_message(context, HDB_ERR_BADVERSION,
1919 "search base missing");
1920 return HDB_ERR_BADVERSION;
1921 }
1922 *search_base = '\0';
1923 search_base++;
1924
1925 ret = hdb_ldap_common(context, db, search_base, p);
1926 free(p);
1927 return ret;
1928 }
1929
1930 #ifdef OPENLDAP_MODULE
1931
1932 struct hdb_so_method hdb_ldap_interface = {
1933 HDB_INTERFACE_VERSION,
1934 "ldap",
1935 hdb_ldap_create
1936 };
1937
1938 struct hdb_so_method hdb_ldapi_interface = {
1939 HDB_INTERFACE_VERSION,
1940 "ldapi",
1941 hdb_ldapi_create
1942 };
1943
1944 #endif
1945
1946 #endif /* OPENLDAP */
Heimdal