2 Unix SMB/CIFS implementation.
4 Create and parse the krb5 PAC
6 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005,2008
7 Copyright (C) Andrew Tridgell 2001
8 Copyright (C) Luke Howard 2002-2003
9 Copyright (C) Stefan Metzmacher 2004-2005
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with this program. If not, see <http://www.gnu.org/licenses/>.
27 #include "system/kerberos.h"
28 #include "auth/auth.h"
29 #include "auth/kerberos/kerberos.h"
30 #include "librpc/gen_ndr/ndr_krb5pac.h"
31 #include "lib/ldb/include/ldb.h"
32 #include "auth/auth_sam_reply.h"
33 #include "param/param.h"
35 static krb5_error_code check_pac_checksum(TALLOC_CTX *mem_ctx,
37 struct PAC_SIGNATURE_DATA *sig,
39 const krb5_keyblock *keyblock)
45 cksum.cksumtype = (CKSUMTYPE)sig->type;
46 cksum.checksum.length = sig->signature.length;
47 cksum.checksum.data = sig->signature.data;
49 ret = krb5_crypto_init(context,
54 DEBUG(0,("krb5_crypto_init() failed: %s\n",
55 smb_get_krb5_error_message(context, ret, mem_ctx)));
58 ret = krb5_verify_checksum(context,
64 krb5_crypto_destroy(context, crypto);
69 NTSTATUS kerberos_decode_pac(TALLOC_CTX *mem_ctx,
70 struct smb_iconv_convenience *iconv_convenience,
71 struct PAC_DATA **pac_data_out,
74 const krb5_keyblock *krbtgt_keyblock,
75 const krb5_keyblock *service_keyblock,
76 krb5_const_principal client_principal,
78 krb5_error_code *k5ret)
82 enum ndr_err_code ndr_err;
83 struct PAC_SIGNATURE_DATA *srv_sig_ptr = NULL;
84 struct PAC_SIGNATURE_DATA *kdc_sig_ptr = NULL;
85 struct PAC_SIGNATURE_DATA *srv_sig_wipe = NULL;
86 struct PAC_SIGNATURE_DATA *kdc_sig_wipe = NULL;
87 struct PAC_LOGON_INFO *logon_info = NULL;
88 struct PAC_LOGON_NAME *logon_name = NULL;
89 struct PAC_DATA *pac_data;
90 struct PAC_DATA_RAW *pac_data_raw;
92 DATA_BLOB *srv_sig_blob = NULL;
93 DATA_BLOB *kdc_sig_blob = NULL;
95 DATA_BLOB modified_pac_blob;
96 NTTIME tgs_authtime_nttime;
97 krb5_principal client_principal_pac;
100 krb5_clear_error_string(context);
103 *k5ret = KRB5_PARSE_MALFORMED;
106 pac_data = talloc(mem_ctx, struct PAC_DATA);
107 pac_data_raw = talloc(mem_ctx, struct PAC_DATA_RAW);
108 kdc_sig_wipe = talloc(mem_ctx, struct PAC_SIGNATURE_DATA);
109 srv_sig_wipe = talloc(mem_ctx, struct PAC_SIGNATURE_DATA);
110 if (!pac_data_raw || !pac_data || !kdc_sig_wipe || !srv_sig_wipe) {
114 return NT_STATUS_NO_MEMORY;
117 ndr_err = ndr_pull_struct_blob(&blob, pac_data,
118 iconv_convenience, pac_data,
119 (ndr_pull_flags_fn_t)ndr_pull_PAC_DATA);
120 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
121 status = ndr_map_error2ntstatus(ndr_err);
122 DEBUG(0,("can't parse the PAC: %s\n",
127 if (pac_data->num_buffers < 4) {
128 /* we need logon_ingo, service_key and kdc_key */
129 DEBUG(0,("less than 4 PAC buffers\n"));
130 return NT_STATUS_INVALID_PARAMETER;
133 ndr_err = ndr_pull_struct_blob(&blob, pac_data_raw,
134 iconv_convenience, pac_data_raw,
135 (ndr_pull_flags_fn_t)ndr_pull_PAC_DATA_RAW);
136 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
137 status = ndr_map_error2ntstatus(ndr_err);
138 DEBUG(0,("can't parse the PAC: %s\n",
143 if (pac_data_raw->num_buffers < 4) {
144 /* we need logon_ingo, service_key and kdc_key */
145 DEBUG(0,("less than 4 PAC buffers\n"));
146 return NT_STATUS_INVALID_PARAMETER;
149 if (pac_data->num_buffers != pac_data_raw->num_buffers) {
150 /* we need logon_ingo, service_key and kdc_key */
151 DEBUG(0,("misparse! PAC_DATA has %d buffers while PAC_DATA_RAW has %d\n",
152 pac_data->num_buffers, pac_data_raw->num_buffers));
153 return NT_STATUS_INVALID_PARAMETER;
156 for (i=0; i < pac_data->num_buffers; i++) {
157 if (pac_data->buffers[i].type != pac_data_raw->buffers[i].type) {
158 DEBUG(0,("misparse! PAC_DATA buffer %d has type %d while PAC_DATA_RAW has %d\n",
159 i, pac_data->buffers[i].type, pac_data->buffers[i].type));
160 return NT_STATUS_INVALID_PARAMETER;
162 switch (pac_data->buffers[i].type) {
163 case PAC_TYPE_LOGON_INFO:
164 if (!pac_data->buffers[i].info) {
167 logon_info = pac_data->buffers[i].info->logon_info.info;
169 case PAC_TYPE_SRV_CHECKSUM:
170 if (!pac_data->buffers[i].info) {
173 srv_sig_ptr = &pac_data->buffers[i].info->srv_cksum;
174 srv_sig_blob = &pac_data_raw->buffers[i].info->remaining;
176 case PAC_TYPE_KDC_CHECKSUM:
177 if (!pac_data->buffers[i].info) {
180 kdc_sig_ptr = &pac_data->buffers[i].info->kdc_cksum;
181 kdc_sig_blob = &pac_data_raw->buffers[i].info->remaining;
183 case PAC_TYPE_LOGON_NAME:
184 logon_name = &pac_data->buffers[i].info->logon_name;
192 DEBUG(0,("PAC no logon_info\n"));
193 return NT_STATUS_INVALID_PARAMETER;
197 DEBUG(0,("PAC no logon_name\n"));
198 return NT_STATUS_INVALID_PARAMETER;
201 if (!srv_sig_ptr || !srv_sig_blob) {
202 DEBUG(0,("PAC no srv_key\n"));
203 return NT_STATUS_INVALID_PARAMETER;
206 if (!kdc_sig_ptr || !kdc_sig_blob) {
207 DEBUG(0,("PAC no kdc_key\n"));
208 return NT_STATUS_INVALID_PARAMETER;
211 /* Find and zero out the signatures, as required by the signing algorithm */
213 /* We find the data blobs above, now we parse them to get at the exact portion we should zero */
214 ndr_err = ndr_pull_struct_blob(kdc_sig_blob, kdc_sig_wipe,
215 iconv_convenience, kdc_sig_wipe,
216 (ndr_pull_flags_fn_t)ndr_pull_PAC_SIGNATURE_DATA);
217 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
218 status = ndr_map_error2ntstatus(ndr_err);
219 DEBUG(0,("can't parse the KDC signature: %s\n",
224 ndr_err = ndr_pull_struct_blob(srv_sig_blob, srv_sig_wipe,
225 iconv_convenience, srv_sig_wipe,
226 (ndr_pull_flags_fn_t)ndr_pull_PAC_SIGNATURE_DATA);
227 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
228 status = ndr_map_error2ntstatus(ndr_err);
229 DEBUG(0,("can't parse the SRV signature: %s\n",
234 /* Now zero the decoded structure */
235 memset(kdc_sig_wipe->signature.data, '\0', kdc_sig_wipe->signature.length);
236 memset(srv_sig_wipe->signature.data, '\0', srv_sig_wipe->signature.length);
238 /* and reencode, back into the same place it came from */
239 ndr_err = ndr_push_struct_blob(kdc_sig_blob, pac_data_raw,
242 (ndr_push_flags_fn_t)ndr_push_PAC_SIGNATURE_DATA);
243 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
244 status = ndr_map_error2ntstatus(ndr_err);
245 DEBUG(0,("can't repack the KDC signature: %s\n",
249 ndr_err = ndr_push_struct_blob(srv_sig_blob, pac_data_raw,
252 (ndr_push_flags_fn_t)ndr_push_PAC_SIGNATURE_DATA);
253 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
254 status = ndr_map_error2ntstatus(ndr_err);
255 DEBUG(0,("can't repack the SRV signature: %s\n",
260 /* push out the whole structure, but now with zero'ed signatures */
261 ndr_err = ndr_push_struct_blob(&modified_pac_blob, pac_data_raw,
264 (ndr_push_flags_fn_t)ndr_push_PAC_DATA_RAW);
265 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
266 status = ndr_map_error2ntstatus(ndr_err);
267 DEBUG(0,("can't repack the RAW PAC: %s\n",
272 /* verify by service_key */
273 ret = check_pac_checksum(mem_ctx,
274 modified_pac_blob, srv_sig_ptr,
278 DEBUG(1, ("PAC Decode: Failed to verify the service signature: %s\n",
279 smb_get_krb5_error_message(context, ret, mem_ctx)));
283 return NT_STATUS_ACCESS_DENIED;
286 if (krbtgt_keyblock) {
287 ret = check_pac_checksum(mem_ctx,
288 srv_sig_ptr->signature, kdc_sig_ptr,
289 context, krbtgt_keyblock);
291 DEBUG(1, ("PAC Decode: Failed to verify the KDC signature: %s\n",
292 smb_get_krb5_error_message(context, ret, mem_ctx)));
296 return NT_STATUS_ACCESS_DENIED;
300 /* Convert to NT time, so as not to loose accuracy in comparison */
301 unix_to_nt_time(&tgs_authtime_nttime, tgs_authtime);
303 if (tgs_authtime_nttime != logon_name->logon_time) {
304 DEBUG(2, ("PAC Decode: Logon time mismatch between ticket and PAC!\n"));
305 DEBUG(2, ("PAC Decode: PAC: %s\n", nt_time_string(mem_ctx, logon_name->logon_time)));
306 DEBUG(2, ("PAC Decode: Ticket: %s\n", nt_time_string(mem_ctx, tgs_authtime_nttime)));
307 return NT_STATUS_ACCESS_DENIED;
310 ret = krb5_parse_name_flags(context, logon_name->account_name, KRB5_PRINCIPAL_PARSE_NO_REALM,
311 &client_principal_pac);
313 DEBUG(2, ("Could not parse name from incoming PAC: [%s]: %s\n",
314 logon_name->account_name,
315 smb_get_krb5_error_message(context, ret, mem_ctx)));
319 return NT_STATUS_INVALID_PARAMETER;
322 if (!krb5_principal_compare_any_realm(context, client_principal, client_principal_pac)) {
323 DEBUG(2, ("Name in PAC [%s] does not match principal name in ticket\n",
324 logon_name->account_name));
325 return NT_STATUS_ACCESS_DENIED;
329 if (strcasecmp(logon_info->info3.base.account_name.string,
330 "Administrator")== 0) {
331 file_save("tmp_pac_data-admin.dat",blob.data,blob.length);
335 DEBUG(3,("Found account name from PAC: %s [%s]\n",
336 logon_info->info3.base.account_name.string,
337 logon_info->info3.base.full_name.string));
338 *pac_data_out = pac_data;
343 _PUBLIC_ NTSTATUS kerberos_pac_logon_info(TALLOC_CTX *mem_ctx,
344 struct smb_iconv_convenience *iconv_convenience,
345 struct PAC_LOGON_INFO **logon_info,
347 krb5_context context,
348 const krb5_keyblock *krbtgt_keyblock,
349 const krb5_keyblock *service_keyblock,
350 krb5_const_principal client_principal,
352 krb5_error_code *k5ret)
355 struct PAC_DATA *pac_data;
357 nt_status = kerberos_decode_pac(mem_ctx,
367 if (!NT_STATUS_IS_OK(nt_status)) {
372 for (i=0; i < pac_data->num_buffers; i++) {
373 if (pac_data->buffers[i].type != PAC_TYPE_LOGON_INFO) {
376 *logon_info = pac_data->buffers[i].info->logon_info.info;
379 return NT_STATUS_INVALID_PARAMETER;
384 static krb5_error_code make_pac_checksum(TALLOC_CTX *mem_ctx,
386 struct PAC_SIGNATURE_DATA *sig,
387 krb5_context context,
388 const krb5_keyblock *keyblock)
395 ret = krb5_crypto_init(context,
400 DEBUG(0,("krb5_crypto_init() failed: %s\n",
401 smb_get_krb5_error_message(context, ret, mem_ctx)));
404 ret = krb5_create_checksum(context,
412 DEBUG(2, ("PAC Verification failed: %s\n",
413 smb_get_krb5_error_message(context, ret, mem_ctx)));
416 krb5_crypto_destroy(context, crypto);
422 sig->type = cksum.cksumtype;
423 sig->signature = data_blob_talloc(mem_ctx, cksum.checksum.data, cksum.checksum.length);
424 free_Checksum(&cksum);
429 krb5_error_code kerberos_encode_pac(TALLOC_CTX *mem_ctx,
430 struct smb_iconv_convenience *iconv_convenience,
431 struct PAC_DATA *pac_data,
432 krb5_context context,
433 const krb5_keyblock *krbtgt_keyblock,
434 const krb5_keyblock *service_keyblock,
439 enum ndr_err_code ndr_err;
440 DATA_BLOB zero_blob = data_blob(NULL, 0);
441 DATA_BLOB tmp_blob = data_blob(NULL, 0);
442 struct PAC_SIGNATURE_DATA *kdc_checksum = NULL;
443 struct PAC_SIGNATURE_DATA *srv_checksum = NULL;
446 /* First, just get the keytypes filled in (and lengths right, eventually) */
447 for (i=0; i < pac_data->num_buffers; i++) {
448 if (pac_data->buffers[i].type != PAC_TYPE_KDC_CHECKSUM) {
451 kdc_checksum = &pac_data->buffers[i].info->kdc_cksum,
452 ret = make_pac_checksum(mem_ctx, &zero_blob,
454 context, krbtgt_keyblock);
456 DEBUG(2, ("making krbtgt PAC checksum failed: %s\n",
457 smb_get_krb5_error_message(context, ret, mem_ctx)));
458 talloc_free(pac_data);
463 for (i=0; i < pac_data->num_buffers; i++) {
464 if (pac_data->buffers[i].type != PAC_TYPE_SRV_CHECKSUM) {
467 srv_checksum = &pac_data->buffers[i].info->srv_cksum;
468 ret = make_pac_checksum(mem_ctx, &zero_blob,
470 context, service_keyblock);
472 DEBUG(2, ("making service PAC checksum failed: %s\n",
473 smb_get_krb5_error_message(context, ret, mem_ctx)));
474 talloc_free(pac_data);
480 DEBUG(2, ("Invalid PAC constructed for signing, no KDC checksum present!"));
484 DEBUG(2, ("Invalid PAC constructed for signing, no SRV checksum present!"));
488 /* But wipe out the actual signatures */
489 memset(kdc_checksum->signature.data, '\0', kdc_checksum->signature.length);
490 memset(srv_checksum->signature.data, '\0', srv_checksum->signature.length);
492 ndr_err = ndr_push_struct_blob(&tmp_blob, mem_ctx,
495 (ndr_push_flags_fn_t)ndr_push_PAC_DATA);
496 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
497 nt_status = ndr_map_error2ntstatus(ndr_err);
498 DEBUG(1, ("PAC (presig) push failed: %s\n", nt_errstr(nt_status)));
499 talloc_free(pac_data);
503 /* Then sign the result of the previous push, where the sig was zero'ed out */
504 ret = make_pac_checksum(mem_ctx, &tmp_blob, srv_checksum,
505 context, service_keyblock);
507 /* Then sign Server checksum */
508 ret = make_pac_checksum(mem_ctx, &srv_checksum->signature, kdc_checksum, context, krbtgt_keyblock);
510 DEBUG(2, ("making krbtgt PAC checksum failed: %s\n",
511 smb_get_krb5_error_message(context, ret, mem_ctx)));
512 talloc_free(pac_data);
516 /* And push it out again, this time to the world. This relies on determanistic pointer values */
517 ndr_err = ndr_push_struct_blob(&tmp_blob, mem_ctx,
520 (ndr_push_flags_fn_t)ndr_push_PAC_DATA);
521 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
522 nt_status = ndr_map_error2ntstatus(ndr_err);
523 DEBUG(1, ("PAC (final) push failed: %s\n", nt_errstr(nt_status)));
524 talloc_free(pac_data);
534 krb5_error_code kerberos_create_pac(TALLOC_CTX *mem_ctx,
535 struct smb_iconv_convenience *iconv_convenience,
536 struct auth_serversupplied_info *server_info,
537 krb5_context context,
538 const krb5_keyblock *krbtgt_keyblock,
539 const krb5_keyblock *service_keyblock,
540 krb5_principal client_principal,
546 struct PAC_DATA *pac_data = talloc(mem_ctx, struct PAC_DATA);
547 struct netr_SamInfo3 *sam3;
548 union PAC_INFO *u_LOGON_INFO;
549 struct PAC_LOGON_INFO *LOGON_INFO;
550 union PAC_INFO *u_LOGON_NAME;
551 struct PAC_LOGON_NAME *LOGON_NAME;
552 union PAC_INFO *u_KDC_CHECKSUM;
553 union PAC_INFO *u_SRV_CHECKSUM;
558 PAC_BUF_LOGON_INFO = 0,
559 PAC_BUF_LOGON_NAME = 1,
560 PAC_BUF_SRV_CHECKSUM = 2,
561 PAC_BUF_KDC_CHECKSUM = 3,
562 PAC_BUF_NUM_BUFFERS = 4
569 pac_data->num_buffers = PAC_BUF_NUM_BUFFERS;
570 pac_data->version = 0;
572 pac_data->buffers = talloc_array(pac_data,
574 pac_data->num_buffers);
575 if (!pac_data->buffers) {
576 talloc_free(pac_data);
581 u_LOGON_INFO = talloc_zero(pac_data->buffers, union PAC_INFO);
583 talloc_free(pac_data);
586 pac_data->buffers[PAC_BUF_LOGON_INFO].type = PAC_TYPE_LOGON_INFO;
587 pac_data->buffers[PAC_BUF_LOGON_INFO].info = u_LOGON_INFO;
590 u_LOGON_NAME = talloc_zero(pac_data->buffers, union PAC_INFO);
592 talloc_free(pac_data);
595 pac_data->buffers[PAC_BUF_LOGON_NAME].type = PAC_TYPE_LOGON_NAME;
596 pac_data->buffers[PAC_BUF_LOGON_NAME].info = u_LOGON_NAME;
597 LOGON_NAME = &u_LOGON_NAME->logon_name;
600 u_SRV_CHECKSUM = talloc_zero(pac_data->buffers, union PAC_INFO);
601 if (!u_SRV_CHECKSUM) {
602 talloc_free(pac_data);
605 pac_data->buffers[PAC_BUF_SRV_CHECKSUM].type = PAC_TYPE_SRV_CHECKSUM;
606 pac_data->buffers[PAC_BUF_SRV_CHECKSUM].info = u_SRV_CHECKSUM;
609 u_KDC_CHECKSUM = talloc_zero(pac_data->buffers, union PAC_INFO);
610 if (!u_KDC_CHECKSUM) {
611 talloc_free(pac_data);
614 pac_data->buffers[PAC_BUF_KDC_CHECKSUM].type = PAC_TYPE_KDC_CHECKSUM;
615 pac_data->buffers[PAC_BUF_KDC_CHECKSUM].info = u_KDC_CHECKSUM;
617 /* now the real work begins... */
619 LOGON_INFO = talloc_zero(u_LOGON_INFO, struct PAC_LOGON_INFO);
621 talloc_free(pac_data);
624 nt_status = auth_convert_server_info_saminfo3(LOGON_INFO, server_info, &sam3);
625 if (!NT_STATUS_IS_OK(nt_status)) {
626 DEBUG(1, ("Getting Samba info failed: %s\n", nt_errstr(nt_status)));
627 talloc_free(pac_data);
631 u_LOGON_INFO->logon_info.info = LOGON_INFO;
632 LOGON_INFO->info3 = *sam3;
634 ret = krb5_unparse_name_flags(context, client_principal,
635 KRB5_PRINCIPAL_UNPARSE_NO_REALM, &name);
639 LOGON_NAME->account_name = talloc_strdup(LOGON_NAME, name);
642 this logon_time field is absolutely critical. This is what
643 caused all our PAC troubles :-)
645 unix_to_nt_time(&LOGON_NAME->logon_time, tgs_authtime);
647 ret = kerberos_encode_pac(mem_ctx,
654 talloc_free(pac_data);
658 krb5_error_code kerberos_pac_to_server_info(TALLOC_CTX *mem_ctx,
659 struct smb_iconv_convenience *iconv_convenience,
661 krb5_context context,
662 struct auth_serversupplied_info **server_info)
665 enum ndr_err_code ndr_err;
668 DATA_BLOB pac_logon_info_in, pac_srv_checksum_in, pac_kdc_checksum_in;
669 krb5_data k5pac_logon_info_in, k5pac_srv_checksum_in, k5pac_kdc_checksum_in;
672 union netr_Validation validation;
673 struct auth_serversupplied_info *server_info_out;
675 TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
681 ret = krb5_pac_get_buffer(context, pac, PAC_TYPE_LOGON_INFO, &k5pac_logon_info_in);
683 talloc_free(tmp_ctx);
687 pac_logon_info_in = data_blob_const(k5pac_logon_info_in.data, k5pac_logon_info_in.length);
689 ndr_err = ndr_pull_union_blob(&pac_logon_info_in, tmp_ctx, iconv_convenience, &info,
691 (ndr_pull_flags_fn_t)ndr_pull_PAC_INFO);
692 krb5_data_free(&k5pac_logon_info_in);
693 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err) || !info.logon_info.info) {
694 nt_status = ndr_map_error2ntstatus(ndr_err);
695 DEBUG(0,("can't parse the PAC LOGON_INFO: %s\n", nt_errstr(nt_status)));
696 talloc_free(tmp_ctx);
700 /* Pull this right into the normal auth sysstem structures */
701 validation.sam3 = &info.logon_info.info->info3;
702 nt_status = make_server_info_netlogon_validation(mem_ctx,
706 if (!NT_STATUS_IS_OK(nt_status)) {
707 talloc_free(tmp_ctx);
711 ret = krb5_pac_get_buffer(context, pac, PAC_TYPE_SRV_CHECKSUM, &k5pac_srv_checksum_in);
713 talloc_free(tmp_ctx);
717 pac_srv_checksum_in = data_blob_const(k5pac_srv_checksum_in.data, k5pac_srv_checksum_in.length);
719 ndr_err = ndr_pull_struct_blob(&pac_srv_checksum_in, server_info_out,
720 iconv_convenience, &server_info_out->pac_srv_sig,
721 (ndr_pull_flags_fn_t)ndr_pull_PAC_SIGNATURE_DATA);
722 krb5_data_free(&k5pac_srv_checksum_in);
723 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
724 nt_status = ndr_map_error2ntstatus(ndr_err);
725 DEBUG(0,("can't parse the KDC signature: %s\n",
726 nt_errstr(nt_status)));
730 ret = krb5_pac_get_buffer(context, pac, PAC_TYPE_KDC_CHECKSUM, &k5pac_kdc_checksum_in);
732 talloc_free(tmp_ctx);
736 pac_kdc_checksum_in = data_blob_const(k5pac_kdc_checksum_in.data, k5pac_kdc_checksum_in.length);
738 ndr_err = ndr_pull_struct_blob(&pac_kdc_checksum_in, server_info_out,
739 iconv_convenience, &server_info_out->pac_kdc_sig,
740 (ndr_pull_flags_fn_t)ndr_pull_PAC_SIGNATURE_DATA);
741 krb5_data_free(&k5pac_kdc_checksum_in);
742 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
743 nt_status = ndr_map_error2ntstatus(ndr_err);
744 DEBUG(0,("can't parse the KDC signature: %s\n",
745 nt_errstr(nt_status)));
749 *server_info = server_info_out;
755 NTSTATUS kerberos_pac_blob_to_server_info(TALLOC_CTX *mem_ctx,
756 struct smb_iconv_convenience *iconv_convenience,
758 krb5_context context,
759 struct auth_serversupplied_info **server_info)
763 ret = krb5_pac_parse(context,
764 pac_blob.data, pac_blob.length,
767 return map_nt_error_from_unix(ret);
771 ret = kerberos_pac_to_server_info(mem_ctx, iconv_convenience, pac, context, server_info);
772 krb5_pac_free(context, pac);
774 return map_nt_error_from_unix(ret);