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
|
/*
Unix SMB/CIFS implementation.
useful utilities for the DRS server
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 "libcli/security/security.h"
#include "libcli/security/session.h"
#include "param/param.h"
#include "auth/session.h"
#include "rpc_server/drsuapi/dcesrv_drsuapi.h"
int drsuapi_search_with_extended_dn(struct ldb_context *ldb,
TALLOC_CTX *mem_ctx,
struct ldb_result **_res,
struct ldb_dn *basedn,
enum ldb_scope scope,
const char * const *attrs,
const char *filter)
{
int ret;
struct ldb_request *req;
TALLOC_CTX *tmp_ctx;
struct ldb_result *res;
tmp_ctx = talloc_new(mem_ctx);
res = talloc_zero(tmp_ctx, struct ldb_result);
if (!res) {
return LDB_ERR_OPERATIONS_ERROR;
}
ret = ldb_build_search_req(&req, ldb, tmp_ctx,
basedn,
scope,
filter,
attrs,
NULL,
res,
ldb_search_default_callback,
NULL);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
ret = ldb_request_add_control(req, LDB_CONTROL_EXTENDED_DN_OID, true, NULL);
if (ret != LDB_SUCCESS) {
return ret;
}
ret = ldb_request_add_control(req, LDB_CONTROL_SHOW_RECYCLED_OID, true, NULL);
if (ret != LDB_SUCCESS) {
return ret;
}
ret = ldb_request_add_control(req, LDB_CONTROL_REVEAL_INTERNALS, false, NULL);
if (ret != LDB_SUCCESS) {
return ret;
}
ret = ldb_request(ldb, req);
if (ret == LDB_SUCCESS) {
ret = ldb_wait(req->handle, LDB_WAIT_ALL);
}
talloc_free(req);
*_res = talloc_steal(mem_ctx, res);
return ret;
}
WERROR drs_security_level_check(struct dcesrv_call_state *dce_call,
const char* call,
enum security_user_level minimum_level,
const struct dom_sid *domain_sid)
{
enum security_user_level level;
if (lpcfg_parm_bool(dce_call->conn->dce_ctx->lp_ctx, NULL,
"drs", "disable_sec_check", false)) {
return WERR_OK;
}
level = security_session_user_level(dce_call->conn->auth_state.session_info, domain_sid);
if (level < minimum_level) {
if (call) {
DEBUG(0,("%s refused for security token (level=%u)\n",
call, (unsigned)level));
security_token_debug(0, 2, dce_call->conn->auth_state.session_info->security_token);
}
return WERR_DS_DRA_ACCESS_DENIED;
}
return WERR_OK;
}
void drsuapi_process_secret_attribute(struct drsuapi_DsReplicaAttribute *attr,
struct drsuapi_DsReplicaMetaData *meta_data)
{
if (attr->value_ctr.num_values == 0) {
return;
}
switch (attr->attid) {
case DRSUAPI_ATTID_dBCSPwd:
case DRSUAPI_ATTID_unicodePwd:
case DRSUAPI_ATTID_ntPwdHistory:
case DRSUAPI_ATTID_lmPwdHistory:
case DRSUAPI_ATTID_supplementalCredentials:
case DRSUAPI_ATTID_priorValue:
case DRSUAPI_ATTID_currentValue:
case DRSUAPI_ATTID_trustAuthOutgoing:
case DRSUAPI_ATTID_trustAuthIncoming:
case DRSUAPI_ATTID_initialAuthOutgoing:
case DRSUAPI_ATTID_initialAuthIncoming:
/*set value to null*/
attr->value_ctr.num_values = 0;
talloc_free(attr->value_ctr.values);
attr->value_ctr.values = NULL;
meta_data->originating_change_time = 0;
return;
default:
return;
}
}
/*
check security on a DN, with logging of errors
*/
static WERROR drs_security_access_check_log(struct ldb_context *sam_ctx,
TALLOC_CTX *mem_ctx,
struct security_token *token,
struct ldb_dn *dn,
const char *ext_right)
{
int ret;
if (!dn) {
DEBUG(3,("drs_security_access_check: Null dn provided, access is denied for %s\n",
ext_right));
return WERR_DS_DRA_ACCESS_DENIED;
}
ret = dsdb_check_access_on_dn(sam_ctx,
mem_ctx,
dn,
token,
SEC_ADS_CONTROL_ACCESS,
ext_right);
if (ret == LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS) {
DEBUG(3,("%s refused for security token on %s\n",
ext_right, ldb_dn_get_linearized(dn)));
security_token_debug(2, 0, token);
return WERR_DS_DRA_ACCESS_DENIED;
} else if (ret != LDB_SUCCESS) {
DEBUG(1,("Failed to perform access check on %s: %s\n", ldb_dn_get_linearized(dn), ldb_strerror(ret)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
return WERR_OK;
}
/*
check security on a object identifier
*/
WERROR drs_security_access_check(struct ldb_context *sam_ctx,
TALLOC_CTX *mem_ctx,
struct security_token *token,
struct drsuapi_DsReplicaObjectIdentifier *nc,
const char *ext_right)
{
struct ldb_dn *dn = drs_ObjectIdentifier_to_dn(mem_ctx, sam_ctx, nc);
WERROR werr;
werr = drs_security_access_check_log(sam_ctx, mem_ctx, token, dn, ext_right);
talloc_free(dn);
return werr;
}
/*
check security on the NC root of a object identifier
*/
WERROR drs_security_access_check_nc_root(struct ldb_context *sam_ctx,
TALLOC_CTX *mem_ctx,
struct security_token *token,
struct drsuapi_DsReplicaObjectIdentifier *nc,
const char *ext_right)
{
struct ldb_dn *dn, *nc_root;
WERROR werr;
int ret;
dn = drs_ObjectIdentifier_to_dn(mem_ctx, sam_ctx, nc);
W_ERROR_HAVE_NO_MEMORY(dn);
ret = dsdb_find_nc_root(sam_ctx, dn, dn, &nc_root);
if (ret != LDB_SUCCESS) {
return WERR_DS_CANT_FIND_EXPECTED_NC;
}
werr = drs_security_access_check_log(sam_ctx, mem_ctx, token, nc_root, ext_right);
talloc_free(dn);
return werr;
}
|
