2 Unix SMB/CIFS implementation.
3 kerberos authorization data (PAC) utility library
4 Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
5 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
6 Copyright (C) Andrew Tridgell 2001
7 Copyright (C) Luke Howard 2002-2003
8 Copyright (C) Stefan Metzmacher 2004-2005
9 Copyright (C) Guenther Deschner 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 2 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.
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software
23 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
30 static BOOL pac_io_logon_name(const char *desc, PAC_LOGON_NAME *logon_name,
31 prs_struct *ps, int depth)
33 if (NULL == logon_name)
36 prs_debug(ps, depth, desc, "pac_io_logon_name");
39 if (!smb_io_time("logon_time", &logon_name->logon_time, ps, depth))
42 if (!prs_uint16("len", ps, depth, &logon_name->len))
45 /* The following string is always in little endian 16 bit values,
46 copy as 8 bits to avoid endian reversal on big-endian machines.
47 len is the length in bytes. */
49 if (UNMARSHALLING(ps) && logon_name->len) {
50 logon_name->username = PRS_ALLOC_MEM(ps, uint8, logon_name->len);
51 if (!logon_name->username) {
52 DEBUG(3, ("No memory available\n"));
57 if (!prs_uint8s(True, "name", ps, depth, logon_name->username, logon_name->len))
63 #if 0 /* Unused (handled now in net_io_user_info3()) - Guenther */
64 static BOOL pac_io_krb_sids(const char *desc, KRB_SID_AND_ATTRS *sid_and_attr,
65 prs_struct *ps, int depth)
67 if (NULL == sid_and_attr)
70 prs_debug(ps, depth, desc, "pac_io_krb_sids");
73 if (UNMARSHALLING(ps)) {
74 sid_and_attr->sid = PRS_ALLOC_MEM(ps, DOM_SID2, 1);
75 if (!sid_and_attr->sid) {
76 DEBUG(3, ("No memory available\n"));
81 if(!smb_io_dom_sid2("sid", sid_and_attr->sid, ps, depth))
88 static BOOL pac_io_krb_attrs(const char *desc, KRB_SID_AND_ATTRS *sid_and_attr,
89 prs_struct *ps, int depth)
91 if (NULL == sid_and_attr)
94 prs_debug(ps, depth, desc, "pac_io_krb_attrs");
97 if (!prs_uint32("sid_ptr", ps, depth, &sid_and_attr->sid_ptr))
99 if (!prs_uint32("attrs", ps, depth, &sid_and_attr->attrs))
105 static BOOL pac_io_krb_sid_and_attr_array(const char *desc,
106 KRB_SID_AND_ATTR_ARRAY *array,
108 prs_struct *ps, int depth)
115 prs_debug(ps, depth, desc, "pac_io_krb_sid_and_attr_array");
119 if (!prs_uint32("count", ps, depth, &array->count))
122 if (UNMARSHALLING(ps)) {
124 array->krb_sid_and_attrs = PRS_ALLOC_MEM(ps, KRB_SID_AND_ATTRS, num);
125 if (!array->krb_sid_and_attrs) {
126 DEBUG(3, ("No memory available\n"));
130 array->krb_sid_and_attrs = NULL;
134 for (i=0; i<num; i++) {
135 if (!pac_io_krb_attrs(desc,
136 &array->krb_sid_and_attrs[i],
141 for (i=0; i<num; i++) {
142 if (!pac_io_krb_sids(desc,
143 &array->krb_sid_and_attrs[i],
154 static BOOL pac_io_group_membership(const char *desc,
155 GROUP_MEMBERSHIP *membership,
156 prs_struct *ps, int depth)
158 if (NULL == membership)
161 prs_debug(ps, depth, desc, "pac_io_group_membership");
164 if (!prs_uint32("rid", ps, depth, &membership->rid))
166 if (!prs_uint32("attrs", ps, depth, &membership->attrs))
173 static BOOL pac_io_group_membership_array(const char *desc,
174 GROUP_MEMBERSHIP_ARRAY *array,
176 prs_struct *ps, int depth)
183 prs_debug(ps, depth, desc, "pac_io_group_membership_array");
187 if (!prs_uint32("count", ps, depth, &array->count))
190 if (UNMARSHALLING(ps)) {
192 array->group_membership = PRS_ALLOC_MEM(ps, GROUP_MEMBERSHIP, num);
193 if (!array->group_membership) {
194 DEBUG(3, ("No memory available\n"));
198 array->group_membership = NULL;
202 for (i=0; i<num; i++) {
203 if (!pac_io_group_membership(desc,
204 &array->group_membership[i],
214 #if 0 /* Unused, replaced using an expanded net_io_user_info3() now - Guenther */
215 static BOOL pac_io_pac_logon_info(const char *desc, PAC_LOGON_INFO *info,
216 prs_struct *ps, int depth)
223 prs_debug(ps, depth, desc, "pac_io_pac_logon_info");
228 if (!prs_uint32("unknown", ps, depth, &garbage)) /* 00081001 */
230 if (!prs_uint32("unknown", ps, depth, &garbage)) /* cccccccc */
232 if (!prs_uint32("bufferlen", ps, depth, &garbage))
234 if (!prs_uint32("bufferlenhi", ps, depth, &garbage)) /* 00000000 */
237 if (!prs_uint32("pointer", ps, depth, &garbage))
242 if (!smb_io_time("logon_time", &info->logon_time, ps, depth))
244 if (!smb_io_time("logoff_time", &info->logoff_time, ps, depth))
246 if (!smb_io_time("kickoff_time", &info->kickoff_time, ps, depth))
248 if (!smb_io_time("pass_last_set_time", &info->pass_last_set_time,
251 if (!smb_io_time("pass_can_change_time", &info->pass_can_change_time,
254 if (!smb_io_time("pass_must_change_time", &info->pass_must_change_time,
258 if (!smb_io_unihdr("hdr_user_name", &info->hdr_user_name, ps, depth))
260 if (!smb_io_unihdr("hdr_full_name", &info->hdr_full_name, ps, depth))
262 if (!smb_io_unihdr("hdr_logon_script", &info->hdr_logon_script,
265 if (!smb_io_unihdr("hdr_profile_path", &info->hdr_profile_path,
268 if (!smb_io_unihdr("hdr_home_dir", &info->hdr_home_dir, ps, depth))
270 if (!smb_io_unihdr("hdr_dir_drive", &info->hdr_dir_drive, ps, depth))
273 if (!prs_uint16("logon_count", ps, depth, &info->logon_count))
275 if (!prs_uint16("bad_password_count", ps, depth, &info->bad_password_count))
277 if (!prs_uint32("user_rid", ps, depth, &info->user_rid))
279 if (!prs_uint32("group_rid", ps, depth, &info->group_rid))
281 if (!prs_uint32("group_count", ps, depth, &info->group_count))
283 /* I haven't seen this contain anything yet, but when it does
284 we will have to make sure we decode the contents in the middle
285 all the unistr2s ... */
286 if (!prs_uint32("group_mem_ptr", ps, depth,
287 &info->group_membership_ptr))
289 if (!prs_uint32("user_flags", ps, depth, &info->user_flags))
292 if (!prs_uint8s(False, "session_key", ps, depth, info->session_key, 16))
295 if (!smb_io_unihdr("hdr_dom_controller",
296 &info->hdr_dom_controller, ps, depth))
298 if (!smb_io_unihdr("hdr_dom_name", &info->hdr_dom_name, ps, depth))
301 /* this should be followed, but just get ptr for now */
302 if (!prs_uint32("ptr_dom_sid", ps, depth, &info->ptr_dom_sid))
305 if (!prs_uint8s(False, "lm_session_key", ps, depth, info->lm_session_key, 8))
308 if (!prs_uint32("acct_flags", ps, depth, &info->acct_flags))
311 for (i = 0; i < 7; i++)
313 if (!prs_uint32("unkown", ps, depth, &info->unknown[i])) /* unknown */
317 if (!prs_uint32("sid_count", ps, depth, &info->sid_count))
319 if (!prs_uint32("ptr_extra_sids", ps, depth, &info->ptr_extra_sids))
321 if (!prs_uint32("ptr_res_group_dom_sid", ps, depth,
322 &info->ptr_res_group_dom_sid))
324 if (!prs_uint32("res_group_count", ps, depth, &info->res_group_count))
326 if (!prs_uint32("ptr_res_groups", ps, depth, &info->ptr_res_groups))
329 if(!smb_io_unistr2("uni_user_name", &info->uni_user_name,
330 info->hdr_user_name.buffer, ps, depth))
332 if(!smb_io_unistr2("uni_full_name", &info->uni_full_name,
333 info->hdr_full_name.buffer, ps, depth))
335 if(!smb_io_unistr2("uni_logon_script", &info->uni_logon_script,
336 info->hdr_logon_script.buffer, ps, depth))
338 if(!smb_io_unistr2("uni_profile_path", &info->uni_profile_path,
339 info->hdr_profile_path.buffer, ps, depth))
341 if(!smb_io_unistr2("uni_home_dir", &info->uni_home_dir,
342 info->hdr_home_dir.buffer, ps, depth))
344 if(!smb_io_unistr2("uni_dir_drive", &info->uni_dir_drive,
345 info->hdr_dir_drive.buffer, ps, depth))
348 if (info->group_membership_ptr) {
349 if (!pac_io_group_membership_array("group membership",
357 if(!smb_io_unistr2("uni_dom_controller", &info->uni_dom_controller,
358 info->hdr_dom_controller.buffer, ps, depth))
360 if(!smb_io_unistr2("uni_dom_name", &info->uni_dom_name,
361 info->hdr_dom_name.buffer, ps, depth))
364 if(info->ptr_dom_sid)
365 if(!smb_io_dom_sid2("dom_sid", &info->dom_sid, ps, depth))
369 if (info->sid_count && info->ptr_extra_sids)
370 if (!pac_io_krb_sid_and_attr_array("extra_sids",
376 if (info->ptr_res_group_dom_sid)
377 if (!smb_io_dom_sid2("res_group_dom_sid",
378 &info->res_group_dom_sid, ps, depth))
381 if (info->ptr_res_groups) {
383 if (!(info->user_flgs & LOGON_RESOURCE_GROUPS)) {
384 DEBUG(0,("user_flgs attribute does not have LOGON_RESOURCE_GROUPS\n"));
388 if (!pac_io_group_membership_array("res group membership",
390 info->res_group_count,
399 static BOOL pac_io_pac_logon_info(const char *desc, PAC_LOGON_INFO *info,
400 prs_struct *ps, int depth)
403 BOOL kerb_validation_info = True;
408 prs_debug(ps, depth, desc, "pac_io_pac_logon_info");
413 if (!prs_uint32("unknown", ps, depth, &garbage)) /* 00081001 */
415 if (!prs_uint32("unknown", ps, depth, &garbage)) /* cccccccc */
417 if (!prs_uint32("bufferlen", ps, depth, &garbage))
419 if (!prs_uint32("bufferlenhi", ps, depth, &garbage)) /* 00000000 */
422 if(!net_io_user_info3("", &info->info3, ps, depth, 3, kerb_validation_info))
425 if (info->info3.ptr_res_group_dom_sid) {
426 if (!smb_io_dom_sid2("res_group_dom_sid",
427 &info->res_group_dom_sid, ps, depth))
431 if (info->info3.ptr_res_groups) {
433 if (!(info->info3.user_flgs & LOGON_RESOURCE_GROUPS)) {
434 DEBUG(0,("user_flgs attribute does not have LOGON_RESOURCE_GROUPS\n"));
438 if (!pac_io_group_membership_array("res group membership",
440 info->info3.res_group_count,
450 static BOOL pac_io_pac_signature_data(const char *desc,
451 PAC_SIGNATURE_DATA *data, uint32 length,
452 prs_struct *ps, int depth)
456 prs_debug(ps, depth, desc, "pac_io_pac_signature_data");
464 if (!prs_uint32("type", ps, depth, &data->type))
467 if ( length > sizeof(uint32) )
468 siglen = length - sizeof(uint32);
470 if (UNMARSHALLING(ps) && length) {
472 data->signature.buffer = PRS_ALLOC_MEM(ps, uint8, siglen);
473 if (!data->signature.buffer) {
474 DEBUG(3, ("No memory available\n"));
478 data->signature.buffer = NULL;
482 data->signature.buf_len = siglen;
484 if (!prs_uint8s(False, "signature", ps, depth, data->signature.buffer, data->signature.buf_len))
491 static BOOL pac_io_pac_info_hdr_ctr(const char *desc, PAC_BUFFER *hdr,
492 prs_struct *ps, int depth)
497 prs_debug(ps, depth, desc, "pac_io_pac_info_hdr_ctr");
503 if (hdr->offset != prs_offset(ps)) {
504 DEBUG(5,("offset in header(x%x) and data(x%x) do not match, correcting\n",
505 hdr->offset, prs_offset(ps)));
506 prs_set_offset(ps, hdr->offset);
509 if (UNMARSHALLING(ps) && hdr->size > 0) {
510 hdr->ctr = PRS_ALLOC_MEM(ps, PAC_INFO_CTR, 1);
512 DEBUG(3, ("No memory available\n"));
518 case PAC_TYPE_LOGON_INFO:
519 DEBUG(5, ("PAC_TYPE_LOGON_INFO\n"));
520 if (UNMARSHALLING(ps))
521 hdr->ctr->pac.logon_info = PRS_ALLOC_MEM(ps, PAC_LOGON_INFO, 1);
522 if (!hdr->ctr->pac.logon_info) {
523 DEBUG(3, ("No memory available\n"));
526 if (!pac_io_pac_logon_info(desc, hdr->ctr->pac.logon_info,
531 case PAC_TYPE_SERVER_CHECKSUM:
532 DEBUG(5, ("PAC_TYPE_SERVER_CHECKSUM\n"));
533 if (UNMARSHALLING(ps))
534 hdr->ctr->pac.srv_cksum = PRS_ALLOC_MEM(ps, PAC_SIGNATURE_DATA, 1);
535 if (!hdr->ctr->pac.srv_cksum) {
536 DEBUG(3, ("No memory available\n"));
539 if (!pac_io_pac_signature_data(desc, hdr->ctr->pac.srv_cksum,
540 hdr->size, ps, depth))
544 case PAC_TYPE_PRIVSVR_CHECKSUM:
545 DEBUG(5, ("PAC_TYPE_PRIVSVR_CHECKSUM\n"));
546 if (UNMARSHALLING(ps))
547 hdr->ctr->pac.privsrv_cksum = PRS_ALLOC_MEM(ps, PAC_SIGNATURE_DATA, 1);
548 if (!hdr->ctr->pac.privsrv_cksum) {
549 DEBUG(3, ("No memory available\n"));
552 if (!pac_io_pac_signature_data(desc,
553 hdr->ctr->pac.privsrv_cksum,
554 hdr->size, ps, depth))
558 case PAC_TYPE_LOGON_NAME:
559 DEBUG(5, ("PAC_TYPE_LOGON_NAME\n"));
560 if (UNMARSHALLING(ps))
561 hdr->ctr->pac.logon_name = PRS_ALLOC_MEM(ps, PAC_LOGON_NAME, 1);
562 if (!hdr->ctr->pac.logon_name) {
563 DEBUG(3, ("No memory available\n"));
566 if (!pac_io_logon_name(desc, hdr->ctr->pac.logon_name,
572 /* dont' know, so we need to skip it */
573 DEBUG(3, ("unknown PAC type %d\n", hdr->type));
574 prs_set_offset(ps, prs_offset(ps) + hdr->size);
579 if (!prs_uint32("pad", ps, depth, &hdr->pad))
585 static BOOL pac_io_pac_info_hdr(const char *desc, PAC_BUFFER *hdr,
586 prs_struct *ps, int depth)
591 prs_debug(ps, depth, desc, "pac_io_pac_info_hdr");
596 if (!prs_uint32("type", ps, depth, &hdr->type))
598 if (!prs_uint32("size", ps, depth, &hdr->size))
600 if (!prs_uint32("offset", ps, depth, &hdr->offset))
602 if (!prs_uint32("offsethi", ps, depth, &hdr->offsethi))
608 static BOOL pac_io_pac_data(const char *desc, PAC_DATA *data,
609 prs_struct *ps, int depth)
616 prs_debug(ps, depth, desc, "pac_io_pac_data");
621 if (!prs_uint32("num_buffers", ps, depth, &data->num_buffers))
623 if (!prs_uint32("version", ps, depth, &data->version))
626 if (UNMARSHALLING(ps) && data->num_buffers > 0) {
627 if ((data->pac_buffer = PRS_ALLOC_MEM(ps, PAC_BUFFER, data->num_buffers)) == NULL) {
632 for (i=0; i<data->num_buffers; i++) {
633 if (!pac_io_pac_info_hdr(desc, &data->pac_buffer[i], ps,
638 for (i=0; i<data->num_buffers; i++) {
639 if (!pac_io_pac_info_hdr_ctr(desc, &data->pac_buffer[i],
647 static NTSTATUS check_pac_checksum(TALLOC_CTX *mem_ctx,
649 PAC_SIGNATURE_DATA *sig,
650 krb5_context context,
651 krb5_keyblock *keyblock)
655 krb5_keyusage usage = 0;
657 smb_krb5_checksum_from_pac_sig(&cksum, sig);
659 #ifdef HAVE_KRB5_KU_OTHER_CKSUM /* Heimdal */
660 usage = KRB5_KU_OTHER_CKSUM;
661 #elif defined(HAVE_KRB5_KEYUSAGE_APP_DATA_CKSUM) /* MIT */
662 usage = KRB5_KEYUSAGE_APP_DATA_CKSUM;
664 #error UNKNOWN_KRB5_KEYUSAGE
667 ret = smb_krb5_verify_checksum(context,
675 DEBUG(2,("check_pac_checksum: PAC Verification failed: %s (%d)\n",
676 error_message(ret), ret));
677 return NT_STATUS_ACCESS_DENIED;
683 static NTSTATUS parse_pac_data(TALLOC_CTX *mem_ctx, DATA_BLOB *pac_data_blob, PAC_DATA *pac_data)
688 if (!prs_init(&ps, pac_data_blob->length, mem_ctx, UNMARSHALL))
689 return NT_STATUS_NO_MEMORY;
691 if (!prs_copy_data_in(&ps, (char *)pac_data_blob->data, pac_data_blob->length))
692 return NT_STATUS_INVALID_PARAMETER;
694 prs_set_offset(&ps, 0);
696 my_pac = TALLOC_ZERO_P(mem_ctx, PAC_DATA);
697 if (!pac_io_pac_data("pac data", my_pac, &ps, 0))
698 return NT_STATUS_INVALID_PARAMETER;
707 /* just for debugging, will be removed later - Guenther */
708 char *pac_group_attr_string(uint32 attr)
715 if (attr & SE_GROUP_MANDATORY) fstrcat(name, "SE_GROUP_MANDATORY ");
716 if (attr & SE_GROUP_ENABLED_BY_DEFAULT) fstrcat(name, "SE_GROUP_ENABLED_BY_DEFAULT ");
717 if (attr & SE_GROUP_ENABLED) fstrcat(name, "SE_GROUP_ENABLED ");
718 if (attr & SE_GROUP_OWNER) fstrcat(name, "SE_GROUP_OWNER ");
719 if (attr & SE_GROUP_USE_FOR_DENY_ONLY) fstrcat(name, "SE_GROUP_USE_FOR_DENY_ONLY ");
720 if (attr & SE_GROUP_LOGON_ID) fstrcat(name, "SE_GROUP_LOGON_ID ");
721 if (attr & SE_GROUP_RESOURCE) fstrcat(name, "SE_GROUP_RESOURCE ");
723 return SMB_STRDUP(name);
726 /* just for debugging, will be removed later - Guenther */
727 static void dump_pac_logon_info(PAC_LOGON_INFO *logon_info) {
729 DOM_SID dom_sid, res_group_dom_sid;
732 uint32 user_flgs = logon_info->info3.user_flgs;
734 if (logon_info->info3.ptr_res_group_dom_sid) {
735 sid_copy(&res_group_dom_sid, &logon_info->res_group_dom_sid.sid);
737 sid_copy(&dom_sid, &logon_info->info3.dom_sid.sid);
739 DEBUG(10,("The PAC:\n"));
741 DEBUGADD(10,("\tUser Flags: 0x%x (%d)\n", user_flgs, user_flgs));
742 if (user_flgs & LOGON_EXTRA_SIDS)
743 DEBUGADD(10,("\tUser Flags: LOGON_EXTRA_SIDS 0x%x (%d)\n", LOGON_EXTRA_SIDS, LOGON_EXTRA_SIDS));
744 if (user_flgs & LOGON_RESOURCE_GROUPS)
745 DEBUGADD(10,("\tUser Flags: LOGON_RESOURCE_GROUPS 0x%x (%d)\n", LOGON_RESOURCE_GROUPS, LOGON_RESOURCE_GROUPS));
746 DEBUGADD(10,("\tUser SID: %s-%d\n", sid_string_static(&dom_sid), logon_info->info3.user_rid));
747 DEBUGADD(10,("\tGroup SID: %s-%d\n", sid_string_static(&dom_sid), logon_info->info3.group_rid));
749 DEBUGADD(10,("\tGroup Membership (Global and Universal Groups of own domain):\n"));
750 for (i = 0; i < logon_info->info3.num_groups; i++) {
751 attr_string = pac_group_attr_string(logon_info->info3.gids[i].attr);
752 DEBUGADD(10,("\t\t%d: sid: %s-%d\n\t\t attr: 0x%x == %s\n",
753 i, sid_string_static(&dom_sid),
754 logon_info->info3.gids[i].g_rid,
755 logon_info->info3.gids[i].attr,
757 SAFE_FREE(attr_string);
760 DEBUGADD(10,("\tGroup Membership (Domain Local Groups and Groups from Trusted Domains):\n"));
761 for (i = 0; i < logon_info->info3.num_other_sids; i++) {
762 attr_string = pac_group_attr_string(logon_info->info3.other_sids_attrib[i]);
763 DEBUGADD(10,("\t\t%d: sid: %s\n\t\t attr: 0x%x == %s\n",
764 i, sid_string_static(&logon_info->info3.other_sids[i].sid),
765 logon_info->info3.other_sids_attrib[i],
767 SAFE_FREE(attr_string);
770 DEBUGADD(10,("\tGroup Membership (Ressource Groups (SID History ?)):\n"));
771 for (i = 0; i < logon_info->info3.res_group_count; i++) {
772 attr_string = pac_group_attr_string(logon_info->res_groups.group_membership[i].attrs);
773 DEBUGADD(10,("\t\t%d: sid: %s-%d\n\t\t attr: 0x%x == %s\n",
774 i, sid_string_static(&res_group_dom_sid),
775 logon_info->res_groups.group_membership[i].rid,
776 logon_info->res_groups.group_membership[i].attrs,
778 SAFE_FREE(attr_string);
782 NTSTATUS decode_pac_data(TALLOC_CTX *mem_ctx,
783 DATA_BLOB *pac_data_blob,
784 krb5_context context,
785 krb5_keyblock *service_keyblock,
786 krb5_const_principal client_principal,
791 DATA_BLOB modified_pac_blob;
795 PAC_SIGNATURE_DATA *srv_sig = NULL;
796 PAC_SIGNATURE_DATA *kdc_sig = NULL;
797 PAC_LOGON_NAME *logon_name = NULL;
798 PAC_LOGON_INFO *logon_info = NULL;
799 krb5_principal client_principal_pac = NULL;
800 NTTIME tgs_authtime_nttime;
801 int i, srv_sig_pos = 0, kdc_sig_pos = 0;
806 my_pac = talloc(mem_ctx, PAC_DATA);
808 return NT_STATUS_NO_MEMORY;
811 nt_status = parse_pac_data(mem_ctx, pac_data_blob, my_pac);
812 if (!NT_STATUS_IS_OK(nt_status)) {
813 DEBUG(0,("decode_pac_data: failed to parse PAC\n"));
817 modified_pac_blob = data_blob_talloc(mem_ctx, pac_data_blob->data, pac_data_blob->length);
819 if (my_pac->num_buffers < 4) {
820 nt_status = NT_STATUS_INVALID_PARAMETER;
824 /* store signatures */
825 for (i=0; i < my_pac->num_buffers; i++) {
827 switch (my_pac->pac_buffer[i].type) {
829 case PAC_TYPE_SERVER_CHECKSUM:
830 if (!my_pac->pac_buffer[i].ctr->pac.srv_cksum) {
834 srv_sig = my_pac->pac_buffer[i].ctr->pac.srv_cksum;
836 /* get position of signature buffer */
837 srv_sig_pos = my_pac->pac_buffer[i].offset;
838 srv_sig_pos += sizeof(uint32);
842 case PAC_TYPE_PRIVSVR_CHECKSUM:
843 if (!my_pac->pac_buffer[i].ctr->pac.privsrv_cksum) {
847 kdc_sig = my_pac->pac_buffer[i].ctr->pac.privsrv_cksum;
849 /* get position of signature buffer */
850 kdc_sig_pos = my_pac->pac_buffer[i].offset;
851 kdc_sig_pos += sizeof(uint32);
855 case PAC_TYPE_LOGON_NAME:
856 if (!my_pac->pac_buffer[i].ctr->pac.logon_name) {
860 logon_name = my_pac->pac_buffer[i].ctr->pac.logon_name;
863 case PAC_TYPE_LOGON_INFO:
864 if (!my_pac->pac_buffer[i].ctr->pac.logon_info) {
868 logon_info = my_pac->pac_buffer[i].ctr->pac.logon_info;
874 if (!srv_sig || !kdc_sig || !logon_name || !logon_info) {
875 nt_status = NT_STATUS_INVALID_PARAMETER;
879 /* zero PAC_SIGNATURE_DATA signature buffer */
880 memset(&modified_pac_blob.data[srv_sig_pos], '\0', srv_sig->signature.buf_len);
881 memset(&modified_pac_blob.data[kdc_sig_pos], '\0', kdc_sig->signature.buf_len);
883 /* check server signature */
884 nt_status = check_pac_checksum(mem_ctx, modified_pac_blob, srv_sig, context, service_keyblock);
885 if (!NT_STATUS_IS_OK(nt_status)) {
886 DEBUG(0,("decode_pac_data: failed to verify PAC server signature\n"));
890 /* Convert to NT time, so as not to loose accuracy in comparison */
891 unix_to_nt_time(&tgs_authtime_nttime, tgs_authtime);
893 if (!nt_time_equals(&tgs_authtime_nttime, &logon_name->logon_time)) {
895 DEBUG(2,("decode_pac_data: Logon time mismatch between ticket and PAC!\n"));
896 DEBUGADD(2, ("decode_pac_data: PAC: %s\n",
897 http_timestring(nt_time_to_unix(logon_name->logon_time))));
898 DEBUGADD(2, ("decode_pac_data: Ticket: %s\n",
899 http_timestring(nt_time_to_unix(tgs_authtime_nttime))));
901 nt_status = NT_STATUS_ACCESS_DENIED;
905 if (!logon_name->len) {
906 DEBUG(2,("decode_pac_data: No Logon Name available\n"));
907 nt_status = NT_STATUS_INVALID_PARAMETER;
910 rpcstr_pull(username, logon_name->username, sizeof(username), logon_name->len, 0);
912 ret = smb_krb5_parse_name_norealm(context, username, &client_principal_pac);
914 DEBUG(2,("decode_pac_data: Could not parse name from incoming PAC: [%s]: %s\n",
915 username, error_message(ret)));
916 nt_status = NT_STATUS_INVALID_PARAMETER;
920 if (!smb_krb5_principal_compare_any_realm(context, client_principal, client_principal_pac)) {
921 DEBUG(2,("decode_pac_data: Name in PAC [%s] does not match principal name in ticket\n",
923 nt_status = NT_STATUS_ACCESS_DENIED;
927 DEBUG(10,("Successfully validated Kerberos PAC\n"));
929 dump_pac_logon_info(logon_info);
933 nt_status = NT_STATUS_OK;
936 if (client_principal_pac) {
937 krb5_free_principal(context, client_principal_pac);
943 PAC_LOGON_INFO *get_logon_info_from_pac(PAC_DATA *pac_data)
945 PAC_LOGON_INFO *logon_info = NULL;
948 for (i=0; i < pac_data->num_buffers; i++) {
950 if (pac_data->pac_buffer[i].type != PAC_TYPE_LOGON_INFO)
953 logon_info = pac_data->pac_buffer[i].ctr->pac.logon_info;