Line data Source code
1 : /*
2 : Unix SMB/CIFS implementation.
3 :
4 : fast routines for getting the wire size of security objects
5 :
6 : Copyright (C) Andrew Tridgell 2003
7 : Copyright (C) Stefan Metzmacher 2006-2008
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 :
24 : #include "includes.h"
25 : #include "librpc/gen_ndr/ndr_security.h"
26 : #include "../libcli/security/security.h"
27 :
28 :
29 : /*
30 : * Find the wire size of a security_ace that has no trailing coda.
31 : * This is used in ndr_pull_security_ace() generated from security.idl
32 : * to work out where the coda starts (and in ndr_size_security_ace()
33 : * just below).
34 : */
35 592366639 : static size_t ndr_size_security_ace_core(const struct security_ace *ace, libndr_flags flags)
36 : {
37 22213039 : size_t ret;
38 :
39 592366639 : if (!ace) return 0;
40 :
41 592366639 : ret = 8 + ndr_size_dom_sid(&ace->trustee, flags);
42 592366639 : if (sec_ace_object(ace->type)) {
43 371867514 : ret += 4; /* uint32 bitmap ace->object.object.flags */
44 371867514 : if (ace->object.object.flags & SEC_ACE_OBJECT_TYPE_PRESENT) {
45 341739273 : ret += 16; /* GUID ace->object.object.type.type */
46 : }
47 371867514 : if (ace->object.object.flags & SEC_ACE_INHERITED_OBJECT_TYPE_PRESENT) {
48 213203079 : ret += 16; /* GUID ace->object.object.inherited_type.inherited_type */
49 : }
50 : }
51 :
52 570153600 : return ret;
53 : }
54 :
55 : /*
56 : return the wire size of a security_ace
57 : */
58 158661195 : size_t ndr_size_security_ace(const struct security_ace *ace, libndr_flags flags)
59 : {
60 158661195 : size_t base = ndr_size_security_ace_core(ace, flags);
61 158661195 : size_t ret = base;
62 158661195 : if (sec_ace_callback(ace->type)) {
63 4292 : ret += ace->coda.conditions.length;
64 158656903 : } else if (ace->type == SEC_ACE_TYPE_SYSTEM_RESOURCE_ATTRIBUTE) {
65 308 : ret += ndr_size_security_ace_coda(&ace->coda, ace->type, flags);
66 : } else {
67 158656595 : ret += ace->coda.ignored.length;
68 : }
69 : /* round up to a multiple of 4 (MS-DTYP 2.4.4.1) */
70 158661195 : ret = (ret + 3ULL) & ~3ULL;
71 158661195 : if (unlikely(ret < base)) {
72 : /* overflow, and there's not much we can do anyway */
73 0 : return 0;
74 : }
75 152473480 : return ret;
76 : }
77 :
78 : /*
79 : * An ACE coda can't be bigger than the space allowed for by
80 : * ace->size, so we need to check this from the context of the ACE.
81 : *
82 : * Usually the coda also can't be any smaller than the remaining
83 : * space, because it is defined as a blob consuming everything it can.
84 : *
85 : * This is only used to find the size for the coda subcontext in
86 : * security.idl.
87 : */
88 433705444 : size_t ndr_subcontext_size_of_ace_coda(const struct security_ace *ace,
89 : size_t ace_size,
90 : libndr_flags flags)
91 : {
92 16025324 : size_t core_size;
93 433705444 : if (ace_size == 0) {
94 0 : return 0;
95 : }
96 433705444 : core_size = ndr_size_security_ace_core(ace, flags);
97 433705444 : if (ace_size < core_size) {
98 0 : return 0;
99 : }
100 433705444 : return ace_size - core_size;
101 : }
102 :
103 : /*
104 : return the wire size of a security_acl
105 : */
106 8261743 : size_t ndr_size_security_acl(const struct security_acl *theacl, libndr_flags flags)
107 : {
108 315757 : size_t ret;
109 315757 : int i;
110 8261743 : if (!theacl) return 0;
111 6436846 : ret = 8;
112 50630742 : for (i=0;i<theacl->num_aces;i++) {
113 43883010 : ret += ndr_size_security_ace(&theacl->aces[i], flags);
114 : }
115 6436846 : return ret;
116 : }
117 :
118 : /*
119 : return the wire size of a security descriptor
120 : */
121 1514289 : size_t ndr_size_security_descriptor(const struct security_descriptor *sd, libndr_flags flags)
122 : {
123 4851 : size_t ret;
124 1514289 : if (!sd) return 0;
125 :
126 1513531 : ret = 20;
127 1513531 : ret += ndr_size_dom_sid(sd->owner_sid, flags);
128 1513531 : ret += ndr_size_dom_sid(sd->group_sid, flags);
129 1513531 : ret += ndr_size_security_acl(sd->dacl, flags);
130 1513531 : ret += ndr_size_security_acl(sd->sacl, flags);
131 1513531 : return ret;
132 : }
133 :
134 : /*
135 : return the wire size of a dom_sid
136 : */
137 615705579 : size_t ndr_size_dom_sid(const struct dom_sid *sid, libndr_flags flags)
138 : {
139 615705579 : if (!sid) return 0;
140 615362358 : return 8 + 4*sid->num_auths;
141 : }
142 :
143 3119878 : size_t ndr_size_dom_sid28(const struct dom_sid *sid, libndr_flags flags)
144 : {
145 3119878 : if (all_zero((const uint8_t *)sid, sizeof(struct dom_sid))) {
146 2786274 : return 0;
147 : }
148 333598 : return ndr_size_dom_sid(sid, flags);
149 : }
150 :
151 574 : size_t ndr_size_dom_sid0(const struct dom_sid *sid, libndr_flags flags)
152 : {
153 574 : return ndr_size_dom_sid28(sid, flags);
154 : }
155 :
156 : /*
157 : print a dom_sid
158 : */
159 45594 : void ndr_print_dom_sid(struct ndr_print *ndr, const char *name, const struct dom_sid *sid)
160 : {
161 3961 : struct dom_sid_buf buf;
162 45594 : ndr->print(ndr, "%-25s: %s", name, dom_sid_str_buf(sid, &buf));
163 45594 : }
164 :
165 23608 : void ndr_print_dom_sid2(struct ndr_print *ndr, const char *name, const struct dom_sid *sid)
166 : {
167 23608 : ndr_print_dom_sid(ndr, name, sid);
168 23608 : }
169 :
170 13970 : void ndr_print_dom_sid28(struct ndr_print *ndr, const char *name, const struct dom_sid *sid)
171 : {
172 13970 : ndr_print_dom_sid(ndr, name, sid);
173 13970 : }
174 :
175 2 : void ndr_print_dom_sid0(struct ndr_print *ndr, const char *name, const struct dom_sid *sid)
176 : {
177 2 : ndr_print_dom_sid(ndr, name, sid);
178 2 : }
179 :
180 :
181 : /*
182 : parse a dom_sid2 - this is a dom_sid but with an extra copy of the num_auths field
183 : */
184 586123 : enum ndr_err_code ndr_pull_dom_sid2(struct ndr_pull *ndr, ndr_flags_type ndr_flags, struct dom_sid *sid)
185 : {
186 24143 : uint32_t num_auths;
187 586123 : if (!(ndr_flags & NDR_SCALARS)) {
188 0 : return NDR_ERR_SUCCESS;
189 : }
190 586123 : NDR_CHECK(ndr_pull_uint3264(ndr, NDR_SCALARS, &num_auths));
191 586123 : NDR_CHECK(ndr_pull_dom_sid(ndr, ndr_flags, sid));
192 586123 : if (sid->num_auths != num_auths) {
193 0 : return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
194 : "Bad num_auths %"PRIu32"; should equal %"PRId8,
195 : num_auths, sid->num_auths);
196 : }
197 561980 : return NDR_ERR_SUCCESS;
198 : }
199 :
200 : /*
201 : parse a dom_sid2 - this is a dom_sid but with an extra copy of the num_auths field
202 : */
203 430639 : enum ndr_err_code ndr_push_dom_sid2(struct ndr_push *ndr, ndr_flags_type ndr_flags, const struct dom_sid *sid)
204 : {
205 430639 : if (!(ndr_flags & NDR_SCALARS)) {
206 0 : return NDR_ERR_SUCCESS;
207 : }
208 430639 : NDR_CHECK(ndr_push_uint3264(ndr, NDR_SCALARS, sid->num_auths));
209 430639 : return ndr_push_dom_sid(ndr, ndr_flags, sid);
210 : }
211 :
212 : /*
213 : parse a dom_sid28 - this is a dom_sid in a fixed 28 byte buffer, so we need to ensure there are only up to 5 sub_auth
214 : */
215 2738242 : enum ndr_err_code ndr_pull_dom_sid28(struct ndr_pull *ndr, ndr_flags_type ndr_flags, struct dom_sid *sid)
216 : {
217 24 : enum ndr_err_code status;
218 24 : struct ndr_pull *subndr;
219 :
220 2738242 : if (!(ndr_flags & NDR_SCALARS)) {
221 1369109 : return NDR_ERR_SUCCESS;
222 : }
223 :
224 1369121 : subndr = talloc_zero(ndr, struct ndr_pull);
225 1369121 : NDR_ERR_HAVE_NO_MEMORY(subndr);
226 1369121 : subndr->flags = ndr->flags;
227 1369121 : subndr->current_mem_ctx = ndr->current_mem_ctx;
228 :
229 1369121 : subndr->data = ndr->data + ndr->offset;
230 1369121 : subndr->data_size = 28;
231 1369121 : subndr->offset = 0;
232 :
233 1369121 : status = ndr_pull_advance(ndr, 28);
234 1369121 : if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
235 0 : talloc_free(subndr);
236 0 : return status;
237 : }
238 :
239 1369121 : status = ndr_pull_dom_sid(subndr, ndr_flags, sid);
240 1369121 : if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
241 : /* handle a w2k bug which send random data in the buffer */
242 1 : ZERO_STRUCTP(sid);
243 1369120 : } else if (sid->num_auths == 0) {
244 1236412 : ZERO_STRUCT(sid->sub_auths);
245 : }
246 :
247 1369121 : talloc_free(subndr);
248 1369121 : return NDR_ERR_SUCCESS;
249 : }
250 :
251 : /*
252 : push a dom_sid28 - this is a dom_sid in a 28 byte fixed buffer
253 : */
254 6238796 : enum ndr_err_code ndr_push_dom_sid28(struct ndr_push *ndr, ndr_flags_type ndr_flags, const struct dom_sid *sid)
255 : {
256 24 : uint32_t old_offset;
257 24 : uint32_t padding;
258 :
259 6238796 : if (!(ndr_flags & NDR_SCALARS)) {
260 3119386 : return NDR_ERR_SUCCESS;
261 : }
262 :
263 3119398 : if (sid->num_auths > 5) {
264 0 : return ndr_push_error(ndr, NDR_ERR_RANGE,
265 : "dom_sid28 allows only up to 5 sub auths [%"PRId8"]",
266 : sid->num_auths);
267 : }
268 :
269 3119398 : old_offset = ndr->offset;
270 3119398 : NDR_CHECK(ndr_push_dom_sid(ndr, ndr_flags, sid));
271 :
272 3119398 : padding = 28 - (ndr->offset - old_offset);
273 :
274 3119398 : if (padding > 0) {
275 2851452 : NDR_CHECK(ndr_push_zero(ndr, padding));
276 : }
277 :
278 3119386 : return NDR_ERR_SUCCESS;
279 : }
280 :
281 : /*
282 : parse a dom_sid0 - this is a dom_sid in a variable byte buffer, which is maybe empty
283 : */
284 23 : enum ndr_err_code ndr_pull_dom_sid0(struct ndr_pull *ndr, ndr_flags_type ndr_flags, struct dom_sid *sid)
285 : {
286 23 : if (!(ndr_flags & NDR_SCALARS)) {
287 0 : return NDR_ERR_SUCCESS;
288 : }
289 :
290 23 : if (ndr->data_size == ndr->offset) {
291 0 : ZERO_STRUCTP(sid);
292 0 : return NDR_ERR_SUCCESS;
293 : }
294 :
295 23 : return ndr_pull_dom_sid(ndr, ndr_flags, sid);
296 : }
297 :
298 : /*
299 : push a dom_sid0 - this is a dom_sid in a variable byte buffer, which is maybe empty
300 : */
301 16 : enum ndr_err_code ndr_push_dom_sid0(struct ndr_push *ndr, ndr_flags_type ndr_flags, const struct dom_sid *sid)
302 : {
303 16 : if (!(ndr_flags & NDR_SCALARS)) {
304 0 : return NDR_ERR_SUCCESS;
305 : }
306 :
307 16 : if (!sid) {
308 0 : return NDR_ERR_SUCCESS;
309 : }
310 :
311 16 : if (all_zero((const uint8_t *)sid, sizeof(struct dom_sid))) {
312 0 : return NDR_ERR_SUCCESS;
313 : }
314 :
315 16 : return ndr_push_dom_sid(ndr, ndr_flags, sid);
316 : }
317 :
318 112756988 : _PUBLIC_ enum ndr_err_code ndr_push_dom_sid(struct ndr_push *ndr, ndr_flags_type ndr_flags, const struct dom_sid *r)
319 : {
320 2495139 : uint32_t cntr_sub_auths_0;
321 112756988 : if (ndr_flags & NDR_SCALARS) {
322 112756988 : NDR_CHECK(ndr_push_align(ndr, 4));
323 112756988 : NDR_CHECK(ndr_push_uint8(ndr, NDR_SCALARS, r->sid_rev_num));
324 112756988 : NDR_CHECK(ndr_push_int8(ndr, NDR_SCALARS, r->num_auths));
325 112756988 : NDR_CHECK(ndr_push_array_uint8(ndr, NDR_SCALARS, r->id_auth, 6));
326 112756988 : if (r->num_auths < 0 || r->num_auths > ARRAY_SIZE(r->sub_auths)) {
327 0 : return ndr_push_error(ndr, NDR_ERR_RANGE, "value (%"PRId8") out of range (0 - %zu)", r->num_auths, ARRAY_SIZE(r->sub_auths));
328 : }
329 418427000 : for (cntr_sub_auths_0 = 0; cntr_sub_auths_0 < r->num_auths; cntr_sub_auths_0++) {
330 305670012 : NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, r->sub_auths[cntr_sub_auths_0]));
331 : }
332 : }
333 110261849 : return NDR_ERR_SUCCESS;
334 : }
335 :
336 266117342 : _PUBLIC_ enum ndr_err_code ndr_pull_dom_sid(struct ndr_pull *ndr, ndr_flags_type ndr_flags, struct dom_sid *r)
337 : {
338 8084924 : uint32_t cntr_sub_auths_0;
339 266117342 : if (ndr_flags & NDR_SCALARS) {
340 266117342 : NDR_CHECK(ndr_pull_align(ndr, 4));
341 266117342 : NDR_CHECK(ndr_pull_uint8(ndr, NDR_SCALARS, &r->sid_rev_num));
342 266116957 : NDR_CHECK(ndr_pull_int8(ndr, NDR_SCALARS, &r->num_auths));
343 266116907 : if (r->num_auths < 0 || r->num_auths > ARRAY_SIZE(r->sub_auths)) {
344 8 : return ndr_pull_error(ndr, NDR_ERR_RANGE, "value (%"PRId8") out of range (0 - %zu)", r->num_auths, ARRAY_SIZE(r->sub_auths));
345 : }
346 266116899 : NDR_CHECK(ndr_pull_array_uint8(ndr, NDR_SCALARS, r->id_auth, 6));
347 266116899 : ZERO_STRUCT(r->sub_auths);
348 958438097 : for (cntr_sub_auths_0 = 0; cntr_sub_auths_0 < r->num_auths; cntr_sub_auths_0++) {
349 684236279 : NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &r->sub_auths[cntr_sub_auths_0]));
350 : }
351 : }
352 258031980 : return NDR_ERR_SUCCESS;
353 : }
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