Line data Source code
1 : /*
2 : Unix SMB/CIFS implementation.
3 :
4 : endpoint server for the lsarpc pipe
5 :
6 : Copyright (C) Andrew Tridgell 2004
7 : Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2007
8 :
9 : This program is free software; you can redistribute it and/or modify
10 : it under the terms of the GNU General Public License as published by
11 : the Free Software Foundation; either version 3 of the License, or
12 : (at your option) any later version.
13 :
14 : This program is distributed in the hope that it will be useful,
15 : but WITHOUT ANY WARRANTY; without even the implied warranty of
16 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 : GNU General Public License for more details.
18 :
19 : You should have received a copy of the GNU General Public License
20 : along with this program. If not, see <http://www.gnu.org/licenses/>.
21 : */
22 :
23 : #include "rpc_server/lsa/lsa.h"
24 :
25 : /*
26 : * This matches a Windows 2012R2 dc in
27 : * a domain with function level 2012R2.
28 : */
29 : #define DCESRV_LSA_POLICY_SD_SDDL \
30 : "O:BAG:SY" \
31 : "D:" \
32 : "(D;;0x00000800;;;AN)" \
33 : "(A;;0x000f1fff;;;BA)" \
34 : "(A;;0x00020801;;;WD)" \
35 : "(A;;0x00000801;;;AN)" \
36 : "(A;;0x00001000;;;LS)" \
37 : "(A;;0x00001000;;;NS)" \
38 : "(A;;0x00001000;;;S-1-5-17)" \
39 : "(A;;0x00000801;;;AC)" \
40 : "(A;;0x00000801;;;S-1-15-2-2)"
41 :
42 : static const struct generic_mapping dcesrv_lsa_policy_mapping = {
43 : LSA_POLICY_READ,
44 : LSA_POLICY_WRITE,
45 : LSA_POLICY_EXECUTE,
46 : LSA_POLICY_ALL_ACCESS
47 : };
48 :
49 3056 : NTSTATUS dcesrv_lsa_get_policy_state(struct dcesrv_call_state *dce_call,
50 : TALLOC_CTX *mem_ctx,
51 : uint32_t access_desired,
52 : struct lsa_policy_state **_state)
53 : {
54 1998 : struct auth_session_info *session_info =
55 1058 : dcesrv_call_session_info(dce_call);
56 : enum security_user_level security_level;
57 : struct lsa_policy_state *state;
58 : struct ldb_result *dom_res;
59 3056 : const char *dom_attrs[] = {
60 : "objectSid",
61 : "objectGUID",
62 : "nTMixedDomain",
63 : "fSMORoleOwner",
64 : NULL
65 : };
66 : char *p;
67 : int ret;
68 :
69 3056 : state = talloc_zero(mem_ctx, struct lsa_policy_state);
70 3056 : if (!state) {
71 0 : return NT_STATUS_NO_MEMORY;
72 : }
73 :
74 : /* make sure the sam database is accessible */
75 3056 : state->sam_ldb = dcesrv_samdb_connect_as_user(state, dce_call);
76 3056 : if (state->sam_ldb == NULL) {
77 0 : return NT_STATUS_INVALID_SYSTEM_SERVICE;
78 : }
79 :
80 : /* and the privilege database */
81 3056 : state->pdb = privilege_connect(state, dce_call->conn->dce_ctx->lp_ctx);
82 3056 : if (state->pdb == NULL) {
83 0 : return NT_STATUS_INVALID_SYSTEM_SERVICE;
84 : }
85 :
86 : /* work out the domain_dn - useful for so many calls its worth
87 : fetching here */
88 3056 : state->domain_dn = ldb_get_default_basedn(state->sam_ldb);
89 3056 : if (!state->domain_dn) {
90 0 : return NT_STATUS_NO_MEMORY;
91 : }
92 :
93 : /* work out the forest root_dn - useful for so many calls its worth
94 : fetching here */
95 3056 : state->forest_dn = ldb_get_root_basedn(state->sam_ldb);
96 3056 : if (!state->forest_dn) {
97 0 : return NT_STATUS_NO_MEMORY;
98 : }
99 :
100 3056 : ret = ldb_search(state->sam_ldb, mem_ctx, &dom_res,
101 : state->domain_dn, LDB_SCOPE_BASE, dom_attrs, NULL);
102 3056 : if (ret != LDB_SUCCESS) {
103 0 : return NT_STATUS_INVALID_SYSTEM_SERVICE;
104 : }
105 3056 : if (dom_res->count != 1) {
106 0 : return NT_STATUS_NO_SUCH_DOMAIN;
107 : }
108 :
109 3056 : state->domain_sid = samdb_result_dom_sid(state, dom_res->msgs[0], "objectSid");
110 3056 : if (!state->domain_sid) {
111 0 : return NT_STATUS_NO_SUCH_DOMAIN;
112 : }
113 :
114 3056 : state->domain_guid = samdb_result_guid(dom_res->msgs[0], "objectGUID");
115 :
116 3056 : state->mixed_domain = ldb_msg_find_attr_as_uint(dom_res->msgs[0], "nTMixedDomain", 0);
117 :
118 3056 : talloc_free(dom_res);
119 :
120 3056 : state->domain_name = lpcfg_sam_name(dce_call->conn->dce_ctx->lp_ctx);
121 :
122 3056 : state->domain_dns = ldb_dn_canonical_string(state, state->domain_dn);
123 3056 : if (!state->domain_dns) {
124 0 : return NT_STATUS_NO_SUCH_DOMAIN;
125 : }
126 3056 : p = strchr(state->domain_dns, '/');
127 3056 : if (p) {
128 3056 : *p = '\0';
129 : }
130 :
131 3056 : state->forest_dns = ldb_dn_canonical_string(state, state->forest_dn);
132 3056 : if (!state->forest_dns) {
133 0 : return NT_STATUS_NO_SUCH_DOMAIN;
134 : }
135 3056 : p = strchr(state->forest_dns, '/');
136 3056 : if (p) {
137 3056 : *p = '\0';
138 : }
139 :
140 : /* work out the builtin_dn - useful for so many calls its worth
141 : fetching here */
142 3056 : state->builtin_dn = samdb_search_dn(state->sam_ldb, state, state->domain_dn, "(objectClass=builtinDomain)");
143 3056 : if (!state->builtin_dn) {
144 0 : return NT_STATUS_NO_SUCH_DOMAIN;
145 : }
146 :
147 : /* work out the system_dn - useful for so many calls its worth
148 : fetching here */
149 3056 : state->system_dn = samdb_system_container_dn(state->sam_ldb, state);
150 3056 : if (state->system_dn == NULL) {
151 0 : return NT_STATUS_NO_MEMORY;
152 : }
153 :
154 3056 : state->builtin_sid = dom_sid_parse_talloc(state, SID_BUILTIN);
155 3056 : if (!state->builtin_sid) {
156 0 : return NT_STATUS_NO_SUCH_DOMAIN;
157 : }
158 :
159 3056 : state->nt_authority_sid = dom_sid_parse_talloc(state, SID_NT_AUTHORITY);
160 3056 : if (!state->nt_authority_sid) {
161 0 : return NT_STATUS_NO_SUCH_DOMAIN;
162 : }
163 :
164 3056 : state->creator_owner_domain_sid = dom_sid_parse_talloc(state, SID_CREATOR_OWNER_DOMAIN);
165 3056 : if (!state->creator_owner_domain_sid) {
166 0 : return NT_STATUS_NO_SUCH_DOMAIN;
167 : }
168 :
169 3056 : state->world_domain_sid = dom_sid_parse_talloc(state, SID_WORLD_DOMAIN);
170 3056 : if (!state->world_domain_sid) {
171 0 : return NT_STATUS_NO_SUCH_DOMAIN;
172 : }
173 :
174 4114 : state->sd = sddl_decode(state, DCESRV_LSA_POLICY_SD_SDDL,
175 3056 : state->domain_sid);
176 3056 : if (state->sd == NULL) {
177 0 : return NT_STATUS_NO_MEMORY;
178 : }
179 3056 : state->sd->dacl->revision = SECURITY_ACL_REVISION_NT4;
180 :
181 3056 : se_map_generic(&access_desired, &dcesrv_lsa_policy_mapping);
182 3056 : security_acl_map_generic(state->sd->dacl, &dcesrv_lsa_policy_mapping);
183 :
184 3056 : security_level = security_session_user_level(session_info, NULL);
185 3056 : if (security_level >= SECURITY_SYSTEM) {
186 : /*
187 : * The security descriptor doesn't allow system,
188 : * but we want to allow system via ncalrpc as root.
189 : */
190 381 : state->access_mask = access_desired;
191 381 : if (state->access_mask & SEC_FLAG_MAXIMUM_ALLOWED) {
192 259 : state->access_mask &= ~SEC_FLAG_MAXIMUM_ALLOWED;
193 259 : state->access_mask |= LSA_POLICY_ALL_ACCESS;
194 : }
195 : } else {
196 : NTSTATUS status;
197 :
198 4413 : status = se_access_check(state->sd,
199 2675 : session_info->security_token,
200 : access_desired,
201 : &state->access_mask);
202 2675 : if (!NT_STATUS_IS_OK(status)) {
203 0 : DEBUG(2,("%s: access desired[0x%08X] rejected[0x%08X] - %s\n",
204 : __func__,
205 : (unsigned)access_desired,
206 : (unsigned)state->access_mask,
207 : nt_errstr(status)));
208 0 : return status;
209 : }
210 : }
211 :
212 3056 : DEBUG(10,("%s: access desired[0x%08X] granted[0x%08X] - success.\n",
213 : __func__,
214 : (unsigned)access_desired,
215 : (unsigned)state->access_mask));
216 :
217 3056 : *_state = state;
218 :
219 3056 : return NT_STATUS_OK;
220 : }
221 :
222 : /*
223 : lsa_OpenPolicy2
224 : */
225 2847 : NTSTATUS dcesrv_lsa_OpenPolicy2(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
226 : struct lsa_OpenPolicy2 *r)
227 : {
228 1828 : enum dcerpc_transport_t transport =
229 2847 : dcerpc_binding_get_transport(dce_call->conn->endpoint->ep_description);
230 : NTSTATUS status;
231 : struct lsa_policy_state *state;
232 : struct dcesrv_handle *handle;
233 :
234 2847 : if (transport != NCACN_NP && transport != NCALRPC) {
235 3 : DCESRV_FAULT(DCERPC_FAULT_ACCESS_DENIED);
236 : }
237 :
238 2844 : ZERO_STRUCTP(r->out.handle);
239 :
240 4669 : if (r->in.attr != NULL &&
241 2844 : r->in.attr->root_dir != NULL) {
242 : /* MS-LSAD 3.1.4.4.1 */
243 0 : return NT_STATUS_INVALID_PARAMETER;
244 : }
245 :
246 2844 : status = dcesrv_lsa_get_policy_state(dce_call, mem_ctx,
247 : r->in.access_mask,
248 : &state);
249 2844 : if (!NT_STATUS_IS_OK(status)) {
250 0 : return status;
251 : }
252 :
253 2844 : handle = dcesrv_handle_create(dce_call, LSA_HANDLE_POLICY);
254 2844 : if (!handle) {
255 0 : return NT_STATUS_NO_MEMORY;
256 : }
257 :
258 2844 : handle->data = talloc_steal(handle, state);
259 :
260 2844 : state->handle = handle;
261 2844 : *r->out.handle = handle->wire_handle;
262 :
263 : /* note that we have completely ignored the attr element of
264 : the OpenPolicy. As far as I can tell, this is what w2k3
265 : does */
266 :
267 2844 : return NT_STATUS_OK;
268 : }
269 :
270 : /*
271 : lsa_OpenPolicy
272 : a wrapper around lsa_OpenPolicy2
273 : */
274 580 : NTSTATUS dcesrv_lsa_OpenPolicy(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
275 : struct lsa_OpenPolicy *r)
276 : {
277 369 : enum dcerpc_transport_t transport =
278 580 : dcerpc_binding_get_transport(dce_call->conn->endpoint->ep_description);
279 : struct lsa_OpenPolicy2 r2;
280 :
281 580 : if (transport != NCACN_NP && transport != NCALRPC) {
282 3 : DCESRV_FAULT(DCERPC_FAULT_ACCESS_DENIED);
283 : }
284 :
285 577 : r2.in.system_name = NULL;
286 577 : r2.in.attr = r->in.attr;
287 577 : r2.in.access_mask = r->in.access_mask;
288 577 : r2.out.handle = r->out.handle;
289 :
290 577 : return dcesrv_lsa_OpenPolicy2(dce_call, mem_ctx, &r2);
291 : }
292 :
293 :
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