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
230
231
232
233
234
235
236
237
238
239
240
241
|
/*
Unix SMB/CIFS implementation.
implement the DRSUpdateRefs call
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 "rpc_server/drsuapi/dcesrv_drsuapi.h"
#include "libcli/security/security.h"
#include "auth/session.h"
#include "librpc/gen_ndr/ndr_drsuapi.h"
struct repsTo {
uint32_t count;
struct repsFromToBlob *r;
};
/*
add a replication destination for a given partition GUID
*/
static WERROR uref_add_dest(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
struct ldb_dn *dn, struct repsFromTo1 *dest,
uint32_t options)
{
struct repsTo reps;
WERROR werr;
unsigned int i;
werr = dsdb_loadreps(sam_ctx, mem_ctx, dn, "repsTo", &reps.r, &reps.count);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
for (i=0; i<reps.count; i++) {
if (GUID_compare(&dest->source_dsa_obj_guid,
&reps.r[i].ctr.ctr1.source_dsa_obj_guid) == 0) {
if (options & DRSUAPI_DRS_GETCHG_CHECK) {
return WERR_OK;
} else {
return WERR_DS_DRA_REF_ALREADY_EXISTS;
}
}
}
reps.r = talloc_realloc(mem_ctx, reps.r, struct repsFromToBlob, reps.count+1);
if (reps.r == NULL) {
return WERR_DS_DRA_INTERNAL_ERROR;
}
ZERO_STRUCT(reps.r[reps.count]);
reps.r[reps.count].version = 1;
reps.r[reps.count].ctr.ctr1 = *dest;
reps.count++;
werr = dsdb_savereps(sam_ctx, mem_ctx, dn, "repsTo", reps.r, reps.count);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
return WERR_OK;
}
/*
delete a replication destination for a given partition GUID
*/
static WERROR uref_del_dest(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
struct ldb_dn *dn, struct GUID *dest_guid,
uint32_t options)
{
struct repsTo reps;
WERROR werr;
unsigned int i;
bool found = false;
werr = dsdb_loadreps(sam_ctx, mem_ctx, dn, "repsTo", &reps.r, &reps.count);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
for (i=0; i<reps.count; i++) {
if (GUID_compare(dest_guid, &reps.r[i].ctr.ctr1.source_dsa_obj_guid) == 0) {
if (i+1 < reps.count) {
memmove(&reps.r[i], &reps.r[i+1], sizeof(reps.r[i])*(reps.count-(i+1)));
}
reps.count--;
found = true;
}
}
werr = dsdb_savereps(sam_ctx, mem_ctx, dn, "repsTo", reps.r, reps.count);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
if (!found &&
!(options & DRSUAPI_DRS_GETCHG_CHECK) &&
!(options & DRSUAPI_DRS_ADD_REF)) {
return WERR_DS_DRA_REF_NOT_FOUND;
}
return WERR_OK;
}
/*
drsuapi_DsReplicaUpdateRefs - a non RPC version callable from getncchanges
*/
WERROR drsuapi_UpdateRefs(struct drsuapi_bind_state *b_state, TALLOC_CTX *mem_ctx,
struct drsuapi_DsReplicaUpdateRefsRequest1 *req)
{
WERROR werr;
struct ldb_dn *dn;
struct ldb_context *sam_ctx = b_state->sam_ctx_system?b_state->sam_ctx_system:b_state->sam_ctx;
DEBUG(4,("DsReplicaUpdateRefs for host '%s' with GUID %s options 0x%08x nc=%s\n",
req->dest_dsa_dns_name, GUID_string(mem_ctx, &req->dest_dsa_guid),
req->options,
drs_ObjectIdentifier_to_string(mem_ctx, req->naming_context)));
dn = ldb_dn_new(mem_ctx, sam_ctx, req->naming_context->dn);
if (dn == NULL) {
return WERR_DS_INVALID_DN_SYNTAX;
}
if (ldb_transaction_start(sam_ctx) != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to start transaction on samdb: %s\n",
ldb_errstring(sam_ctx)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
if (req->options & DRSUAPI_DRS_DEL_REF) {
werr = uref_del_dest(sam_ctx, mem_ctx, dn, &req->dest_dsa_guid, req->options);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,("Failed to delete repsTo for %s: %s\n",
GUID_string(mem_ctx, &req->dest_dsa_guid),
win_errstr(werr)));
goto failed;
}
}
if (req->options & DRSUAPI_DRS_ADD_REF) {
struct repsFromTo1 dest;
struct repsFromTo1OtherInfo oi;
ZERO_STRUCT(dest);
ZERO_STRUCT(oi);
oi.dns_name = req->dest_dsa_dns_name;
dest.other_info = &oi;
dest.source_dsa_obj_guid = req->dest_dsa_guid;
dest.replica_flags = req->options;
werr = uref_add_dest(sam_ctx, mem_ctx, dn, &dest, req->options);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,("Failed to add repsTo for %s: %s\n",
GUID_string(mem_ctx, &dest.source_dsa_obj_guid),
win_errstr(werr)));
goto failed;
}
}
if (ldb_transaction_commit(sam_ctx) != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to commit transaction on samdb: %s\n",
ldb_errstring(sam_ctx)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
return WERR_OK;
failed:
ldb_transaction_cancel(sam_ctx);
return werr;
}
/*
drsuapi_DsReplicaUpdateRefs
*/
WERROR dcesrv_drsuapi_DsReplicaUpdateRefs(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
struct drsuapi_DsReplicaUpdateRefs *r)
{
struct dcesrv_handle *h;
struct drsuapi_bind_state *b_state;
struct drsuapi_DsReplicaUpdateRefsRequest1 *req;
WERROR werr;
int ret;
enum security_user_level security_level;
DCESRV_PULL_HANDLE_WERR(h, r->in.bind_handle, DRSUAPI_BIND_HANDLE);
b_state = h->data;
werr = drs_security_level_check(dce_call, "DsReplicaUpdateRefs", SECURITY_RO_DOMAIN_CONTROLLER,
samdb_domain_sid(b_state->sam_ctx));
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
if (r->in.level != 1) {
DEBUG(0,("DrReplicUpdateRefs - unsupported level %u\n", r->in.level));
return WERR_DS_DRA_INVALID_PARAMETER;
}
req = &r->in.req.req1;
security_level = security_session_user_level(dce_call->conn->auth_state.session_info, NULL);
if (security_level < SECURITY_ADMINISTRATOR) {
/* check that they are using an DSA objectGUID that they own */
ret = dsdb_validate_dsa_guid(b_state->sam_ctx,
&req->dest_dsa_guid,
&dce_call->conn->auth_state.session_info->security_token->sids[PRIMARY_USER_SID_INDEX]);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Refusing DsReplicaUpdateRefs for sid %s with GUID %s\n",
dom_sid_string(mem_ctx,
&dce_call->conn->auth_state.session_info->security_token->sids[PRIMARY_USER_SID_INDEX]),
GUID_string(mem_ctx, &req->dest_dsa_guid)));
return WERR_DS_DRA_ACCESS_DENIED;
}
}
werr = drsuapi_UpdateRefs(b_state, mem_ctx, req);
#if 0
NDR_PRINT_FUNCTION_DEBUG(drsuapi_DsReplicaUpdateRefs, NDR_BOTH, r);
#endif
return werr;
}
|
