1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
/*
Unix SMB/CIFS implementation.
implement the DsAddEntry call
Copyright (C) Stefan Metzmacher 2009
Copyright (C) Andrew Tridgell 2009
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "rpc_server/dcerpc_server.h"
#include "dsdb/samdb/samdb.h"
#include "dsdb/common/util.h"
#include "param/param.h"
#include "libcli/security/security.h"
#include "libcli/security/session.h"
#include "rpc_server/drsuapi/dcesrv_drsuapi.h"
#include "librpc/gen_ndr/ndr_drsuapi.h"
/*
add special SPNs needed for DRS replication to machine accounts when
an AddEntry is done to create a nTDSDSA object
*/
static WERROR drsuapi_add_SPNs(struct drsuapi_bind_state *b_state,
struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
const struct drsuapi_DsReplicaObjectListItem *first_object)
{
int ret;
const struct drsuapi_DsReplicaObjectListItem *obj;
const char *attrs[] = { "serverReference", "objectGUID", NULL };
for (obj = first_object; obj; obj=obj->next_object) {
const char *dn_string = obj->object.identifier->dn;
struct ldb_dn *dn = ldb_dn_new(mem_ctx, b_state->sam_ctx, dn_string);
struct ldb_result *res, *res2;
struct ldb_dn *ref_dn;
struct GUID ntds_guid;
struct ldb_message *msg;
struct ldb_message_element *el;
const char *ntds_guid_str;
const char *dom_string;
const char *attrs2[] = { "dNSHostName", "cn", NULL };
const char *dNSHostName, *cn;
DEBUG(6,(__location__ ": Adding SPNs for %s\n",
ldb_dn_get_linearized(dn)));
ret = ldb_search(b_state->sam_ctx, mem_ctx, &res,
dn, LDB_SCOPE_BASE, attrs,
"(objectClass=ntDSDSA)");
if (ret != LDB_SUCCESS || res->count < 1) {
DEBUG(0,(__location__ ": Failed to find dn '%s'\n", dn_string));
return WERR_DS_DRA_INTERNAL_ERROR;
}
ref_dn = samdb_result_dn(b_state->sam_ctx, mem_ctx, res->msgs[0], "serverReference", NULL);
if (ref_dn == NULL) {
/* we only add SPNs for objects with a
serverReference */
continue;
}
DEBUG(6,(__location__ ": serverReference %s\n",
ldb_dn_get_linearized(ref_dn)));
ntds_guid = samdb_result_guid(res->msgs[0], "objectGUID");
ntds_guid_str = GUID_string(res, &ntds_guid);
dom_string = lpcfg_dnsdomain(dce_call->conn->dce_ctx->lp_ctx);
/* get the dNSHostName and cn */
ret = ldb_search(b_state->sam_ctx, mem_ctx, &res2,
ref_dn, LDB_SCOPE_BASE, attrs2, NULL);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to find ref_dn '%s'\n",
ldb_dn_get_linearized(ref_dn)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
dNSHostName = ldb_msg_find_attr_as_string(res2->msgs[0], "dNSHostName", NULL);
cn = ldb_msg_find_attr_as_string(res2->msgs[0], "cn", NULL);
/*
* construct a modify request to add the new SPNs to
* the machine account
*/
msg = ldb_msg_new(mem_ctx);
if (msg == NULL) {
return WERR_NOMEM;
}
msg->dn = ref_dn;
ret = ldb_msg_add_empty(msg, "servicePrincipalName",
LDB_FLAG_MOD_ADD, &el);
if (ret != LDB_SUCCESS) {
return WERR_NOMEM;
}
ldb_msg_add_steal_string(msg, "servicePrincipalName",
talloc_asprintf(el->values,
"E3514235-4B06-11D1-AB04-00C04FC2DCD2/%s/%s",
ntds_guid_str, dom_string));
ldb_msg_add_steal_string(msg, "servicePrincipalName",
talloc_asprintf(el->values, "ldap/%s._msdcs.%s",
ntds_guid_str, dom_string));
if (cn) {
ldb_msg_add_steal_string(msg, "servicePrincipalName",
talloc_asprintf(el->values, "ldap/%s", cn));
}
if (dNSHostName) {
ldb_msg_add_steal_string(msg, "servicePrincipalName",
talloc_asprintf(el->values, "ldap/%s", dNSHostName));
}
if (el->num_values < 2) {
return WERR_NOMEM;
}
ret = dsdb_modify(b_state->sam_ctx, msg, DSDB_MODIFY_PERMISSIVE);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to add SPNs - %s\n",
ldb_errstring(b_state->sam_ctx)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
}
return WERR_OK;
}
/*
drsuapi_DsAddEntry
*/
WERROR dcesrv_drsuapi_DsAddEntry(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
struct drsuapi_DsAddEntry *r)
{
WERROR status;
struct drsuapi_bind_state *b_state;
struct dcesrv_handle *h;
uint32_t num = 0;
struct drsuapi_DsReplicaObjectIdentifier2 *ids = NULL;
int ret;
const struct drsuapi_DsReplicaObjectListItem *first_object;
if (DEBUGLVL(4)) {
NDR_PRINT_FUNCTION_DEBUG(drsuapi_DsAddEntry, NDR_IN, r);
}
/* TODO: check which out level the client supports */
ZERO_STRUCTP(r->out.ctr);
*r->out.level_out = 3;
r->out.ctr->ctr3.err_ver = 1;
r->out.ctr->ctr3.err_data = talloc_zero(mem_ctx, union drsuapi_DsAddEntry_ErrData);
DCESRV_PULL_HANDLE_WERR(h, r->in.bind_handle, DRSUAPI_BIND_HANDLE);
b_state = h->data;
status = drs_security_level_check(dce_call, "DsAddEntry", SECURITY_DOMAIN_CONTROLLER, NULL);
if (!W_ERROR_IS_OK(status)) {
return status;
}
switch (r->in.level) {
case 2:
ret = ldb_transaction_start(b_state->sam_ctx);
if (ret != LDB_SUCCESS) {
return WERR_DS_DRA_INTERNAL_ERROR;
}
first_object = &r->in.req->req2.first_object;
status = dsdb_origin_objects_commit(b_state->sam_ctx,
mem_ctx,
first_object,
&num,
&ids);
if (!W_ERROR_IS_OK(status)) {
r->out.ctr->ctr3.err_data->v1.status = status;
ldb_transaction_cancel(b_state->sam_ctx);
DEBUG(0,(__location__ ": DsAddEntry failed - %s\n", win_errstr(status)));
return status;
}
r->out.ctr->ctr3.count = num;
r->out.ctr->ctr3.objects = ids;
break;
default:
return WERR_FOOBAR;
}
/* if any of the added entries are nTDSDSA objects then we
* need to add the SPNs to the machine account
*/
status = drsuapi_add_SPNs(b_state, dce_call, mem_ctx, first_object);
if (!W_ERROR_IS_OK(status)) {
r->out.ctr->ctr3.err_data->v1.status = status;
ldb_transaction_cancel(b_state->sam_ctx);
DEBUG(0,(__location__ ": DsAddEntry add SPNs failed - %s\n", win_errstr(status)));
return status;
}
ret = ldb_transaction_commit(b_state->sam_ctx);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": DsAddEntry commit failed: %s\n",
ldb_errstring(b_state->sam_ctx)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
return WERR_OK;
}
|
