source: trunk/server/source4/rpc_server/drsuapi/drsutil.c

Last change on this file was 745, checked in by Silvan Scherrer, 13 years ago

Samba Server: updated trunk to 3.6.0
File size: 5.9 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3
4 useful utilities for the DRS server
5
6 Copyright (C) Andrew Tridgell 2009
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20*/
21
22#include "includes.h"
23#include "rpc_server/dcerpc_server.h"
24#include "dsdb/samdb/samdb.h"
25#include "libcli/security/security.h"
26#include "libcli/security/session.h"
27#include "param/param.h"
28#include "auth/session.h"
29
30int drsuapi_search_with_extended_dn(struct ldb_context *ldb,
31 TALLOC_CTX *mem_ctx,
32 struct ldb_result **_res,
33 struct ldb_dn *basedn,
34 enum ldb_scope scope,
35 const char * const *attrs,
36 const char *filter)
37{
38 int ret;
39 struct ldb_request *req;
40 TALLOC_CTX *tmp_ctx;
41 struct ldb_result *res;
42
43 tmp_ctx = talloc_new(mem_ctx);
44
45 res = talloc_zero(tmp_ctx, struct ldb_result);
46 if (!res) {
47 return LDB_ERR_OPERATIONS_ERROR;
48 }
49
50 ret = ldb_build_search_req(&req, ldb, tmp_ctx,
51 basedn,
52 scope,
53 filter,
54 attrs,
55 NULL,
56 res,
57 ldb_search_default_callback,
58 NULL);
59 if (ret != LDB_SUCCESS) {
60 talloc_free(tmp_ctx);
61 return ret;
62 }
63
64 ret = ldb_request_add_control(req, LDB_CONTROL_EXTENDED_DN_OID, true, NULL);
65 if (ret != LDB_SUCCESS) {
66 return ret;
67 }
68
69 ret = ldb_request_add_control(req, LDB_CONTROL_SHOW_RECYCLED_OID, true, NULL);
70 if (ret != LDB_SUCCESS) {
71 return ret;
72 }
73
74 ret = ldb_request_add_control(req, LDB_CONTROL_REVEAL_INTERNALS, false, NULL);
75 if (ret != LDB_SUCCESS) {
76 return ret;
77 }
78
79 ret = ldb_request(ldb, req);
80 if (ret == LDB_SUCCESS) {
81 ret = ldb_wait(req->handle, LDB_WAIT_ALL);
82 }
83
84 talloc_free(req);
85 *_res = talloc_steal(mem_ctx, res);
86 return ret;
87}
88
89WERROR drs_security_level_check(struct dcesrv_call_state *dce_call,
90 const char* call,
91 enum security_user_level minimum_level,
92 const struct dom_sid *domain_sid)
93{
94 enum security_user_level level;
95
96 if (lpcfg_parm_bool(dce_call->conn->dce_ctx->lp_ctx, NULL,
97 "drs", "disable_sec_check", false)) {
98 return WERR_OK;
99 }
100
101 level = security_session_user_level(dce_call->conn->auth_state.session_info, domain_sid);
102 if (level < minimum_level) {
103 if (call) {
104 DEBUG(0,("%s refused for security token (level=%u)\n",
105 call, (unsigned)level));
106 security_token_debug(0, 2, dce_call->conn->auth_state.session_info->security_token);
107 }
108 return WERR_DS_DRA_ACCESS_DENIED;
109 }
110
111 return WERR_OK;
112}
113
114void drsuapi_process_secret_attribute(struct drsuapi_DsReplicaAttribute *attr,
115 struct drsuapi_DsReplicaMetaData *meta_data)
116{
117 if (attr->value_ctr.num_values == 0) {
118 return;
119 }
120
121 switch (attr->attid) {
122 case DRSUAPI_ATTID_dBCSPwd:
123 case DRSUAPI_ATTID_unicodePwd:
124 case DRSUAPI_ATTID_ntPwdHistory:
125 case DRSUAPI_ATTID_lmPwdHistory:
126 case DRSUAPI_ATTID_supplementalCredentials:
127 case DRSUAPI_ATTID_priorValue:
128 case DRSUAPI_ATTID_currentValue:
129 case DRSUAPI_ATTID_trustAuthOutgoing:
130 case DRSUAPI_ATTID_trustAuthIncoming:
131 case DRSUAPI_ATTID_initialAuthOutgoing:
132 case DRSUAPI_ATTID_initialAuthIncoming:
133 /*set value to null*/
134 attr->value_ctr.num_values = 0;
135 talloc_free(attr->value_ctr.values);
136 attr->value_ctr.values = NULL;
137 meta_data->originating_change_time = 0;
138 return;
139 default:
140 return;
141 }
142}
143
144
145/*
146 check security on a DN, with logging of errors
147 */
148static WERROR drs_security_access_check_log(struct ldb_context *sam_ctx,
149 TALLOC_CTX *mem_ctx,
150 struct security_token *token,
151 struct ldb_dn *dn,
152 const char *ext_right)
153{
154 int ret;
155 if (!dn) {
156 DEBUG(3,("drs_security_access_check: Null dn provided, access is denied for %s\n",
157 ext_right));
158 return WERR_DS_DRA_ACCESS_DENIED;
159 }
160 ret = dsdb_check_access_on_dn(sam_ctx,
161 mem_ctx,
162 dn,
163 token,
164 SEC_ADS_CONTROL_ACCESS,
165 ext_right);
166 if (ret == LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS) {
167 DEBUG(3,("%s refused for security token on %s\n",
168 ext_right, ldb_dn_get_linearized(dn)));
169 security_token_debug(2, 0, token);
170 return WERR_DS_DRA_ACCESS_DENIED;
171 } else if (ret != LDB_SUCCESS) {
172 DEBUG(1,("Failed to perform access check on %s\n", ldb_dn_get_linearized(dn)));
173 return WERR_DS_DRA_INTERNAL_ERROR;
174 }
175 return WERR_OK;
176}
177
178
179/*
180 check security on a object identifier
181 */
182WERROR drs_security_access_check(struct ldb_context *sam_ctx,
183 TALLOC_CTX *mem_ctx,
184 struct security_token *token,
185 struct drsuapi_DsReplicaObjectIdentifier *nc,
186 const char *ext_right)
187{
188 struct ldb_dn *dn = drs_ObjectIdentifier_to_dn(mem_ctx, sam_ctx, nc);
189 WERROR werr;
190 werr = drs_security_access_check_log(sam_ctx, mem_ctx, token, dn, ext_right);
191 talloc_free(dn);
192 return werr;
193}
194
195/*
196 check security on the NC root of a object identifier
197 */
198WERROR drs_security_access_check_nc_root(struct ldb_context *sam_ctx,
199 TALLOC_CTX *mem_ctx,
200 struct security_token *token,
201 struct drsuapi_DsReplicaObjectIdentifier *nc,
202 const char *ext_right)
203{
204 struct ldb_dn *dn, *nc_root;
205 WERROR werr;
206 int ret;
207
208 dn = drs_ObjectIdentifier_to_dn(mem_ctx, sam_ctx, nc);
209 W_ERROR_HAVE_NO_MEMORY(dn);
210 ret = dsdb_find_nc_root(sam_ctx, dn, dn, &nc_root);
211 if (ret != LDB_SUCCESS) {
212 return WERR_DS_CANT_FIND_EXPECTED_NC;
213 }
214 werr = drs_security_access_check_log(sam_ctx, mem_ctx, token, nc_root, ext_right);
215 talloc_free(dn);
216 return werr;
217}
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