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src: Add support for running with address sanitizer.
[Samba.git] / source4 / kdc / kpasswdd.c
blob7b322296320afa519d829825a20a846b8147a689
1 /*
2 Unix SMB/CIFS implementation.
3
4 kpasswd Server implementation
5
6 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
7 Copyright (C) Andrew Tridgell 2005
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 */
22
23 #include "includes.h"
24 #include "smbd/service_task.h"
25 #include "auth/gensec/gensec.h"
26 #include "auth/credentials/credentials.h"
27 #include "auth/auth.h"
28 #include "dsdb/samdb/samdb.h"
29 #include "../lib/util/util_ldb.h"
30 #include "libcli/security/security.h"
31 #include "param/param.h"
32 #include "kdc/kdc-glue.h"
33 #include "dsdb/common/util.h"
34
35 /* Return true if there is a valid error packet formed in the error_blob */
36 static bool kpasswdd_make_error_reply(struct kdc_server *kdc,
37 TALLOC_CTX *mem_ctx,
38 uint16_t result_code,
39 const char *error_string,
40 DATA_BLOB *error_blob)
41 {
42 char *error_string_utf8;
43 size_t len;
44
45 DEBUG(result_code ? 3 : 10, ("kpasswdd: %s\n", error_string));
46
47 if (!push_utf8_talloc(mem_ctx, &error_string_utf8, error_string, &len)) {
48 return false;
49 }
50
51 *error_blob = data_blob_talloc(mem_ctx, NULL, 2 + len + 1);
52 if (!error_blob->data) {
53 return false;
54 }
55 RSSVAL(error_blob->data, 0, result_code);
56 memcpy(error_blob->data + 2, error_string_utf8, len + 1);
57 return true;
58 }
59
60 /* Return true if there is a valid error packet formed in the error_blob */
61 static bool kpasswdd_make_unauth_error_reply(struct kdc_server *kdc,
62 TALLOC_CTX *mem_ctx,
63 uint16_t result_code,
64 const char *error_string,
65 DATA_BLOB *error_blob)
66 {
67 bool ret;
68 int kret;
69 DATA_BLOB error_bytes;
70 krb5_data k5_error_bytes, k5_error_blob;
71 ret = kpasswdd_make_error_reply(kdc, mem_ctx, result_code, error_string,
72 &error_bytes);
73 if (!ret) {
74 return false;
75 }
76 k5_error_bytes.data = error_bytes.data;
77 k5_error_bytes.length = error_bytes.length;
78 kret = krb5_mk_error(kdc->smb_krb5_context->krb5_context,
79 result_code, NULL, &k5_error_bytes,
80 NULL, NULL, NULL, NULL, &k5_error_blob);
81 if (kret) {
82 return false;
83 }
84 *error_blob = data_blob_talloc(mem_ctx, k5_error_blob.data, k5_error_blob.length);
85 krb5_data_free(&k5_error_blob);
86 if (!error_blob->data) {
87 return false;
88 }
89 return true;
90 }
91
92 static bool kpasswd_make_pwchange_reply(struct kdc_server *kdc,
93 TALLOC_CTX *mem_ctx,
94 NTSTATUS status,
95 enum samPwdChangeReason reject_reason,
96 struct samr_DomInfo1 *dominfo,
97 DATA_BLOB *error_blob)
98 {
99 if (NT_STATUS_EQUAL(status, NT_STATUS_NO_SUCH_USER)) {
100 return kpasswdd_make_error_reply(kdc, mem_ctx,
101 KRB5_KPASSWD_ACCESSDENIED,
102 "No such user when changing password",
103 error_blob);
104 }
105 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
106 return kpasswdd_make_error_reply(kdc, mem_ctx,
107 KRB5_KPASSWD_ACCESSDENIED,
108 "Not permitted to change password",
109 error_blob);
110 }
111 if (dominfo && NT_STATUS_EQUAL(status, NT_STATUS_PASSWORD_RESTRICTION)) {
112 const char *reject_string;
113 switch (reject_reason) {
114 case SAM_PWD_CHANGE_PASSWORD_TOO_SHORT:
115 reject_string = talloc_asprintf(mem_ctx, "Password too short, password must be at least %d characters long.",
116 dominfo->min_password_length);
117 break;
118 case SAM_PWD_CHANGE_NOT_COMPLEX:
119 reject_string = "Password does not meet complexity requirements";
120 break;
121 case SAM_PWD_CHANGE_PWD_IN_HISTORY:
122 reject_string = talloc_asprintf(mem_ctx, "Password is already in password history. New password must not match any of your %d previous passwords.",
123 dominfo->password_history_length);
124 break;
125 default:
126 reject_string = "Password change rejected, password changes may not be permitted on this account, or the minimum password age may not have elapsed.";
127 break;
128 }
129 return kpasswdd_make_error_reply(kdc, mem_ctx,
130 KRB5_KPASSWD_SOFTERROR,
131 reject_string,
132 error_blob);
133 }
134 if (!NT_STATUS_IS_OK(status)) {
135 return kpasswdd_make_error_reply(kdc, mem_ctx,
136 KRB5_KPASSWD_HARDERROR,
137 talloc_asprintf(mem_ctx, "failed to set password: %s", nt_errstr(status)),
138 error_blob);
139
140 }
141 return kpasswdd_make_error_reply(kdc, mem_ctx, KRB5_KPASSWD_SUCCESS,
142 "Password changed",
143 error_blob);
144 }
145
146 /*
147 A user password change
148
149 Return true if there is a valid error packet (or success) formed in
150 the error_blob
151 */
152 static bool kpasswdd_change_password(struct kdc_server *kdc,
153 TALLOC_CTX *mem_ctx,
154 struct auth_session_info *session_info,
155 const DATA_BLOB *password,
156 DATA_BLOB *reply)
157 {
158 NTSTATUS status;
159 enum samPwdChangeReason reject_reason;
160 struct samr_DomInfo1 *dominfo;
161 struct samr_Password *oldLmHash, *oldNtHash;
162 struct ldb_context *samdb;
163 const char * const attrs[] = { "dBCSPwd", "unicodePwd", NULL };
164 struct ldb_message *msg;
165 int ret;
166
167 /* Fetch the old hashes to get the old password in order to perform
168 * the password change operation. Naturally it would be much better to
169 * have a password hash from an authentication around but this doesn't
170 * seem to be the case here. */
171 ret = dsdb_search_one(kdc->samdb, mem_ctx, &msg, ldb_get_default_basedn(kdc->samdb),
172 LDB_SCOPE_SUBTREE,
173 attrs,
174 DSDB_SEARCH_NO_GLOBAL_CATALOG,
175 "(&(objectClass=user)(sAMAccountName=%s))",
176 session_info->info->account_name);
177 if (ret != LDB_SUCCESS) {
178 return kpasswdd_make_error_reply(kdc, mem_ctx,
179 KRB5_KPASSWD_ACCESSDENIED,
180 "No such user when changing password",
181 reply);
182 }
183
184 /*
185 * No need to check for password lockout here, the KDC will
186 * have done that when issuing the ticket, which is not based
187 * on the user's password
188 */
189 status = samdb_result_passwords_no_lockout(mem_ctx, kdc->task->lp_ctx, msg,
190 &oldLmHash, &oldNtHash);
191 if (!NT_STATUS_IS_OK(status)) {
192 return kpasswdd_make_error_reply(kdc, mem_ctx,
193 KRB5_KPASSWD_ACCESSDENIED,
194 "Not permitted to change password",
195 reply);
196 }
197
198 /* Start a SAM with user privileges for the password change */
199 samdb = samdb_connect(mem_ctx, kdc->task->event_ctx, kdc->task->lp_ctx,
200 session_info, 0);
201 if (!samdb) {
202 return kpasswdd_make_error_reply(kdc, mem_ctx,
203 KRB5_KPASSWD_HARDERROR,
204 "Failed to open samdb",
205 reply);
206 }
207
208 DEBUG(3, ("Changing password of %s\\%s (%s)\n",
209 session_info->info->domain_name,
210 session_info->info->account_name,
211 dom_sid_string(mem_ctx, &session_info->security_token->sids[PRIMARY_USER_SID_INDEX])));
212
213 /* Performs the password change */
214 status = samdb_set_password_sid(samdb, mem_ctx,
215 &session_info->security_token->sids[PRIMARY_USER_SID_INDEX],
216 password, NULL, NULL,
217 oldLmHash, oldNtHash, /* this is a user password change */
218 &reject_reason,
219 &dominfo);
220 return kpasswd_make_pwchange_reply(kdc, mem_ctx,
221 status,
222 reject_reason,
223 dominfo,
224 reply);
225
226 }
227
228 static bool kpasswd_process_request(struct kdc_server *kdc,
229 TALLOC_CTX *mem_ctx,
230 struct gensec_security *gensec_security,
231 uint16_t version,
232 DATA_BLOB *input,
233 DATA_BLOB *reply)
234 {
235 struct auth_session_info *session_info;
236 size_t pw_len;
237
238 if (!NT_STATUS_IS_OK(gensec_session_info(gensec_security,
239 mem_ctx,
240 &session_info))) {
241 return kpasswdd_make_error_reply(kdc, mem_ctx,
242 KRB5_KPASSWD_HARDERROR,
243 "gensec_session_info failed!",
244 reply);
245 }
246
247 switch (version) {
248 case KRB5_KPASSWD_VERS_CHANGEPW:
249 {
250 DATA_BLOB password;
251 if (!convert_string_talloc_handle(mem_ctx, lpcfg_iconv_handle(kdc->task->lp_ctx),
252 CH_UTF8, CH_UTF16,
253 (const char *)input->data,
254 input->length,
255 (void **)&password.data, &pw_len)) {
256 return false;
257 }
258 password.length = pw_len;
259
260 return kpasswdd_change_password(kdc, mem_ctx, session_info,
261 &password, reply);
262 }
263 case KRB5_KPASSWD_VERS_SETPW:
264 {
265 NTSTATUS status;
266 enum samPwdChangeReason reject_reason = SAM_PWD_CHANGE_NO_ERROR;
267 struct samr_DomInfo1 *dominfo = NULL;
268 struct ldb_context *samdb;
269 krb5_context context = kdc->smb_krb5_context->krb5_context;
270
271 ChangePasswdDataMS chpw;
272 DATA_BLOB password;
273
274 krb5_principal principal;
275 char *set_password_on_princ;
276 struct ldb_dn *set_password_on_dn;
277 bool service_principal_name = false;
278
279 size_t len;
280 int ret;
281
282 ret = decode_ChangePasswdDataMS(input->data, input->length,
283 &chpw, &len);
284 if (ret) {
285 return kpasswdd_make_error_reply(kdc, mem_ctx,
286 KRB5_KPASSWD_MALFORMED,
287 "failed to decode password change structure",
288 reply);
289 }
290
291 if (!convert_string_talloc_handle(mem_ctx, lpcfg_iconv_handle(kdc->task->lp_ctx),
292 CH_UTF8, CH_UTF16,
293 (const char *)chpw.newpasswd.data,
294 chpw.newpasswd.length,
295 (void **)&password.data, &pw_len)) {
296 free_ChangePasswdDataMS(&chpw);
297 return false;
298 }
299
300 password.length = pw_len;
301
302 if ((chpw.targname && !chpw.targrealm)
303 || (!chpw.targname && chpw.targrealm)) {
304 free_ChangePasswdDataMS(&chpw);
305 return kpasswdd_make_error_reply(kdc, mem_ctx,
306 KRB5_KPASSWD_MALFORMED,
307 "Realm and principal must be both present, or neither present",
308 reply);
309 }
310 if (chpw.targname && chpw.targrealm) {
311 ret = krb5_build_principal_ext(kdc->smb_krb5_context->krb5_context,
312 &principal,
313 strlen(*chpw.targrealm),
314 *chpw.targrealm, 0);
315 if (ret) {
316 free_ChangePasswdDataMS(&chpw);
317 return kpasswdd_make_error_reply(kdc, mem_ctx,
318 KRB5_KPASSWD_MALFORMED,
319 "failed to get principal",
320 reply);
321 }
322 if (copy_PrincipalName(chpw.targname, &principal->name)) {
323 free_ChangePasswdDataMS(&chpw);
324 krb5_free_principal(context, principal);
325 return kpasswdd_make_error_reply(kdc, mem_ctx,
326 KRB5_KPASSWD_MALFORMED,
327 "failed to extract principal to set",
328 reply);
329 }
330 } else {
331 free_ChangePasswdDataMS(&chpw);
332 return kpasswdd_change_password(kdc, mem_ctx, session_info,
333 &password, reply);
334 }
335 free_ChangePasswdDataMS(&chpw);
336
337 if (principal->name.name_string.len >= 2) {
338 service_principal_name = true;
339
340 /* We use this, rather than 'no realm' flag,
341 * as we don't want to accept a password
342 * change on a principal from another realm */
343
344 if (krb5_unparse_name_short(context, principal, &set_password_on_princ) != 0) {
345 krb5_free_principal(context, principal);
346 return kpasswdd_make_error_reply(kdc, mem_ctx,
347 KRB5_KPASSWD_MALFORMED,
348 "krb5_unparse_name failed!",
349 reply);
350 }
351 } else {
352 if (krb5_unparse_name(context, principal, &set_password_on_princ) != 0) {
353 krb5_free_principal(context, principal);
354 return kpasswdd_make_error_reply(kdc, mem_ctx,
355 KRB5_KPASSWD_MALFORMED,
356 "krb5_unparse_name failed!",
357 reply);
358 }
359 }
360 krb5_free_principal(context, principal);
361
362 samdb = samdb_connect(mem_ctx, kdc->task->event_ctx, kdc->task->lp_ctx, session_info, 0);
363 if (!samdb) {
364 free(set_password_on_princ);
365 return kpasswdd_make_error_reply(kdc, mem_ctx,
366 KRB5_KPASSWD_HARDERROR,
367 "Unable to open database!",
368 reply);
369 }
370
371 DEBUG(3, ("%s\\%s (%s) is changing password of %s\n",
372 session_info->info->domain_name,
373 session_info->info->account_name,
374 dom_sid_string(mem_ctx, &session_info->security_token->sids[PRIMARY_USER_SID_INDEX]),
375 set_password_on_princ));
376 ret = ldb_transaction_start(samdb);
377 if (ret != LDB_SUCCESS) {
378 free(set_password_on_princ);
379 status = NT_STATUS_TRANSACTION_ABORTED;
380 return kpasswd_make_pwchange_reply(kdc, mem_ctx,
381 status,
382 SAM_PWD_CHANGE_NO_ERROR,
383 NULL,
384 reply);
385 }
386
387 if (service_principal_name) {
388 status = crack_service_principal_name(samdb, mem_ctx,
389 set_password_on_princ,
390 &set_password_on_dn, NULL);
391 } else {
392 status = crack_user_principal_name(samdb, mem_ctx,
393 set_password_on_princ,
394 &set_password_on_dn, NULL);
395 }
396 free(set_password_on_princ);
397 if (!NT_STATUS_IS_OK(status)) {
398 ldb_transaction_cancel(samdb);
399 return kpasswd_make_pwchange_reply(kdc, mem_ctx,
400 status,
401 SAM_PWD_CHANGE_NO_ERROR,
402 NULL,
403 reply);
404 }
405
406 if (NT_STATUS_IS_OK(status)) {
407 /* Admin password set */
408 status = samdb_set_password(samdb, mem_ctx,
409 set_password_on_dn, NULL,
410 &password, NULL, NULL,
411 NULL, NULL, /* this is not a user password change */
412 &reject_reason, &dominfo);
413 }
414
415 if (NT_STATUS_IS_OK(status)) {
416 ret = ldb_transaction_commit(samdb);
417 if (ret != LDB_SUCCESS) {
418 DEBUG(1,("Failed to commit transaction to set password on %s: %s\n",
419 ldb_dn_get_linearized(set_password_on_dn),
420 ldb_errstring(samdb)));
421 status = NT_STATUS_TRANSACTION_ABORTED;
422 }
423 } else {
424 ldb_transaction_cancel(samdb);
425 }
426 return kpasswd_make_pwchange_reply(kdc, mem_ctx,
427 status,
428 reject_reason,
429 dominfo,
430 reply);
431 }
432 default:
433 return kpasswdd_make_error_reply(kdc, mem_ctx,
434 KRB5_KPASSWD_BAD_VERSION,
435 talloc_asprintf(mem_ctx,
436 "Protocol version %u not supported",
437 version),
438 reply);
439 }
440 }
441
442 enum kdc_process_ret kpasswdd_process(struct kdc_server *kdc,
443 TALLOC_CTX *mem_ctx,
444 DATA_BLOB *input,
445 DATA_BLOB *reply,
446 struct tsocket_address *peer_addr,
447 struct tsocket_address *my_addr,
448 int datagram_reply)
449 {
450 bool ret;
451 const uint16_t header_len = 6;
452 uint16_t len;
453 uint16_t ap_req_len;
454 uint16_t krb_priv_len;
455 uint16_t version;
456 NTSTATUS nt_status;
457 DATA_BLOB ap_req, krb_priv_req;
458 DATA_BLOB krb_priv_rep = data_blob(NULL, 0);
459 DATA_BLOB ap_rep = data_blob(NULL, 0);
460 DATA_BLOB kpasswd_req, kpasswd_rep;
461 struct cli_credentials *server_credentials;
462 struct gensec_security *gensec_security;
463 TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
464
465 char *keytab_name;
466
467 if (!tmp_ctx) {
468 return KDC_PROCESS_FAILED;
469 }
470
471 if (kdc->am_rodc) {
472 talloc_free(tmp_ctx);
473 return KDC_PROCESS_PROXY;
474 }
475
476 /* Be parinoid. We need to ensure we don't just let the
477 * caller lead us into a buffer overflow */
478 if (input->length <= header_len) {
479 talloc_free(tmp_ctx);
480 return KDC_PROCESS_FAILED;
481 }
482
483 len = RSVAL(input->data, 0);
484 if (input->length != len) {
485 talloc_free(tmp_ctx);
486 return KDC_PROCESS_FAILED;
487 }
488
489 /* There are two different versions of this protocol so far,
490 * plus others in the standards pipe. Fortunetly they all
491 * take a very similar framing */
492 version = RSVAL(input->data, 2);
493 ap_req_len = RSVAL(input->data, 4);
494 if ((ap_req_len >= len) || (ap_req_len + header_len) >= len) {
495 talloc_free(tmp_ctx);
496 return KDC_PROCESS_FAILED;
497 }
498
499 krb_priv_len = len - ap_req_len;
500 ap_req = data_blob_const(&input->data[header_len], ap_req_len);
501 krb_priv_req = data_blob_const(&input->data[header_len + ap_req_len], krb_priv_len);
502
503 server_credentials = cli_credentials_init(tmp_ctx);
504 if (!server_credentials) {
505 DEBUG(1, ("Failed to init server credentials\n"));
506 talloc_free(tmp_ctx);
507 return KDC_PROCESS_FAILED;
508 }
509
510 /* We want the credentials subsystem to use the krb5 context
511 * we already have, rather than a new context */
512 cli_credentials_set_krb5_context(server_credentials, kdc->smb_krb5_context);
513 cli_credentials_set_conf(server_credentials, kdc->task->lp_ctx);
514
515 keytab_name = talloc_asprintf(server_credentials, "HDB:samba4&%p", kdc->base_ctx);
516
517 cli_credentials_set_username(server_credentials, "kadmin/changepw", CRED_SPECIFIED);
518 ret = cli_credentials_set_keytab_name(server_credentials, kdc->task->lp_ctx, keytab_name, CRED_SPECIFIED);
519 if (ret != 0) {
520 ret = kpasswdd_make_unauth_error_reply(kdc, mem_ctx,
521 KRB5_KPASSWD_HARDERROR,
522 talloc_asprintf(mem_ctx,
523 "Failed to obtain server credentials for kadmin/changepw!"),
524 &krb_priv_rep);
525 ap_rep.length = 0;
526 if (ret) {
527 goto reply;
528 }
529 talloc_free(tmp_ctx);
530 return ret;
531 }
532
533 /* We don't strictly need to call this wrapper, and could call
534 * gensec_server_start directly, as we have no need for NTLM
535 * and we have a PAC, but this ensures that the wrapper can be
536 * safely extended for other helpful things in future */
537 nt_status = samba_server_gensec_start(tmp_ctx, kdc->task->event_ctx,
538 kdc->task->msg_ctx,
539 kdc->task->lp_ctx,
540 server_credentials,
541 "kpasswd",
542 &gensec_security);
543 if (!NT_STATUS_IS_OK(nt_status)) {
544 talloc_free(tmp_ctx);
545 return KDC_PROCESS_FAILED;
546 }
547
548 /* The kerberos PRIV packets include these addresses. MIT
549 * clients check that they are present */
550 #if 0
551 /* Skip this part for now, it breaks with a NetAPP filer and
552 * in any case where the client address is behind NAT. If
553 * older MIT clients need this, we might have to insert more
554 * complex code */
555
556 nt_status = gensec_set_remote_address(gensec_security, peer_addr);
557 if (!NT_STATUS_IS_OK(nt_status)) {
558 talloc_free(tmp_ctx);
559 return KDC_PROCESS_FAILED;
560 }
561 #endif
562
563 nt_status = gensec_set_local_address(gensec_security, my_addr);
564 if (!NT_STATUS_IS_OK(nt_status)) {
565 talloc_free(tmp_ctx);
566 return KDC_PROCESS_FAILED;
567 }
568
569 /* We want the GENSEC wrap calls to generate PRIV tokens */
570 gensec_want_feature(gensec_security, GENSEC_FEATURE_SEAL);
571
572 nt_status = gensec_start_mech_by_name(gensec_security, "krb5");
573 if (!NT_STATUS_IS_OK(nt_status)) {
574 talloc_free(tmp_ctx);
575 return KDC_PROCESS_FAILED;
576 }
577
578 /* Accept the AP-REQ and generate teh AP-REP we need for the reply */
579 nt_status = gensec_update_ev(gensec_security, tmp_ctx, kdc->task->event_ctx, ap_req, &ap_rep);
580 if (!NT_STATUS_IS_OK(nt_status) && !NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
581
582 ret = kpasswdd_make_unauth_error_reply(kdc, mem_ctx,
583 KRB5_KPASSWD_HARDERROR,
584 talloc_asprintf(mem_ctx,
585 "gensec_update failed: %s",
586 nt_errstr(nt_status)),
587 &krb_priv_rep);
588 ap_rep.length = 0;
589 if (ret) {
590 goto reply;
591 }
592 talloc_free(tmp_ctx);
593 return KDC_PROCESS_FAILED;
594 }
595
596 /* Extract the data from the KRB-PRIV half of the message */
597 nt_status = gensec_unwrap(gensec_security, tmp_ctx, &krb_priv_req, &kpasswd_req);
598 if (!NT_STATUS_IS_OK(nt_status)) {
599 ret = kpasswdd_make_unauth_error_reply(kdc, mem_ctx,
600 KRB5_KPASSWD_HARDERROR,
601 talloc_asprintf(mem_ctx,
602 "gensec_unwrap failed: %s",
603 nt_errstr(nt_status)),
604 &krb_priv_rep);
605 ap_rep.length = 0;
606 if (ret) {
607 goto reply;
608 }
609 talloc_free(tmp_ctx);
610 return KDC_PROCESS_FAILED;
611 }
612
613 /* Figure out something to do with it (probably changing a password...) */
614 ret = kpasswd_process_request(kdc, tmp_ctx,
615 gensec_security,
616 version,
617 &kpasswd_req, &kpasswd_rep);
618 if (!ret) {
619 /* Argh! */
620 talloc_free(tmp_ctx);
621 return KDC_PROCESS_FAILED;
622 }
623
624 /* And wrap up the reply: This ensures that the error message
625 * or success can be verified by the client */
626 nt_status = gensec_wrap(gensec_security, tmp_ctx,
627 &kpasswd_rep, &krb_priv_rep);
628 if (!NT_STATUS_IS_OK(nt_status)) {
629 ret = kpasswdd_make_unauth_error_reply(kdc, mem_ctx,
630 KRB5_KPASSWD_HARDERROR,
631 talloc_asprintf(mem_ctx,
632 "gensec_wrap failed: %s",
633 nt_errstr(nt_status)),
634 &krb_priv_rep);
635 ap_rep.length = 0;
636 if (ret) {
637 goto reply;
638 }
639 talloc_free(tmp_ctx);
640 return KDC_PROCESS_FAILED;
641 }
642
643 reply:
644 *reply = data_blob_talloc(mem_ctx, NULL, krb_priv_rep.length + ap_rep.length + header_len);
645 if (!reply->data) {
646 talloc_free(tmp_ctx);
647 return KDC_PROCESS_FAILED;
648 }
649
650 RSSVAL(reply->data, 0, reply->length);
651 RSSVAL(reply->data, 2, 1); /* This is a version 1 reply, MS change/set or otherwise */
652 RSSVAL(reply->data, 4, ap_rep.length);
653 memcpy(reply->data + header_len,
654 ap_rep.data,
655 ap_rep.length);
656 memcpy(reply->data + header_len + ap_rep.length,
657 krb_priv_rep.data,
658 krb_priv_rep.length);
659
660 talloc_free(tmp_ctx);
661 return KDC_PROCESS_OK;
662 }
663
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