source: branches/samba-3.5.x/librpc/ndr/ndr_sec_helper.c

Last change on this file was 414, checked in by Herwig Bauernfeind, 15 years ago

Samba 3.5.0: Initial import
File size: 9.3 KB
Line 
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#if _SAMBA_BUILD_ == 4
27#include "libcli/security/security.h"
28#endif
29
30/*
31 return the wire size of a security_ace
32*/
33size_t ndr_size_security_ace(const struct security_ace *ace, struct smb_iconv_convenience *ic, int flags)
34{
35 size_t ret;
36
37 if (!ace) return 0;
38
39 ret = 8 + ndr_size_dom_sid(&ace->trustee, ic, flags);
40
41 switch (ace->type) {
42 case SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT:
43 case SEC_ACE_TYPE_ACCESS_DENIED_OBJECT:
44 case SEC_ACE_TYPE_SYSTEM_AUDIT_OBJECT:
45 case SEC_ACE_TYPE_SYSTEM_ALARM_OBJECT:
46 ret += 4; /* uint32 bitmap ace->object.object.flags */
47 if (ace->object.object.flags & SEC_ACE_OBJECT_TYPE_PRESENT) {
48 ret += 16; /* GUID ace->object.object.type.type */
49 }
50 if (ace->object.object.flags & SEC_ACE_INHERITED_OBJECT_TYPE_PRESENT) {
51 ret += 16; /* GUID ace->object.object.inherited_typeinherited_type */
52 }
53 break;
54 default:
55 break;
56 }
57
58 return ret;
59}
60
61enum ndr_err_code ndr_pull_security_ace(struct ndr_pull *ndr, int ndr_flags, struct security_ace *r)
62{
63 if (ndr_flags & NDR_SCALARS) {
64 uint32_t start_ofs = ndr->offset;
65 uint32_t size = 0;
66 uint32_t pad = 0;
67 NDR_CHECK(ndr_pull_align(ndr, 4));
68 NDR_CHECK(ndr_pull_security_ace_type(ndr, NDR_SCALARS, &r->type));
69 NDR_CHECK(ndr_pull_security_ace_flags(ndr, NDR_SCALARS, &r->flags));
70 NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &r->size));
71 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &r->access_mask));
72 NDR_CHECK(ndr_pull_set_switch_value(ndr, &r->object, r->type));
73 NDR_CHECK(ndr_pull_security_ace_object_ctr(ndr, NDR_SCALARS, &r->object));
74 NDR_CHECK(ndr_pull_dom_sid(ndr, NDR_SCALARS, &r->trustee));
75 size = ndr->offset - start_ofs;
76 if (r->size < size) {
77 return ndr_pull_error(ndr, NDR_ERR_BUFSIZE,
78 "ndr_pull_security_ace: r->size %u < size %u",
79 (unsigned)r->size, size);
80 }
81 pad = r->size - size;
82 NDR_PULL_NEED_BYTES(ndr, pad);
83 ndr->offset += pad;
84 }
85 if (ndr_flags & NDR_BUFFERS) {
86 NDR_CHECK(ndr_pull_security_ace_object_ctr(ndr, NDR_BUFFERS, &r->object));
87 }
88 return NDR_ERR_SUCCESS;
89}
90
91/*
92 return the wire size of a security_acl
93*/
94size_t ndr_size_security_acl(const struct security_acl *theacl, struct smb_iconv_convenience *ic, int flags)
95{
96 size_t ret;
97 int i;
98 if (!theacl) return 0;
99 ret = 8;
100 for (i=0;i<theacl->num_aces;i++) {
101 ret += ndr_size_security_ace(&theacl->aces[i], ic, flags);
102 }
103 return ret;
104}
105
106/*
107 return the wire size of a security descriptor
108*/
109size_t ndr_size_security_descriptor(const struct security_descriptor *sd, struct smb_iconv_convenience *ic, int flags)
110{
111 size_t ret;
112 if (!sd) return 0;
113
114 ret = 20;
115 ret += ndr_size_dom_sid(sd->owner_sid, ic, flags);
116 ret += ndr_size_dom_sid(sd->group_sid, ic, flags);
117 ret += ndr_size_security_acl(sd->dacl, ic, flags);
118 ret += ndr_size_security_acl(sd->sacl, ic, flags);
119 return ret;
120}
121
122/*
123 return the wire size of a dom_sid
124*/
125size_t ndr_size_dom_sid(const struct dom_sid *sid, struct smb_iconv_convenience *ic, int flags)
126{
127 if (!sid) return 0;
128 return 8 + 4*sid->num_auths;
129}
130
131size_t ndr_size_dom_sid28(const struct dom_sid *sid, int flags)
132{
133 struct dom_sid zero_sid;
134
135 if (!sid) return 0;
136
137 ZERO_STRUCT(zero_sid);
138
139 if (memcmp(&zero_sid, sid, sizeof(zero_sid)) == 0) {
140 return 0;
141 }
142
143 return 8 + 4*sid->num_auths;
144}
145
146size_t ndr_size_dom_sid0(const struct dom_sid *sid, int flags)
147{
148 return ndr_size_dom_sid28(sid, flags);
149}
150
151/*
152 print a dom_sid
153*/
154void ndr_print_dom_sid(struct ndr_print *ndr, const char *name, const struct dom_sid *sid)
155{
156 ndr->print(ndr, "%-25s: %s", name, dom_sid_string(ndr, sid));
157}
158
159void ndr_print_dom_sid2(struct ndr_print *ndr, const char *name, const struct dom_sid *sid)
160{
161 ndr_print_dom_sid(ndr, name, sid);
162}
163
164void ndr_print_dom_sid28(struct ndr_print *ndr, const char *name, const struct dom_sid *sid)
165{
166 ndr_print_dom_sid(ndr, name, sid);
167}
168
169void ndr_print_dom_sid0(struct ndr_print *ndr, const char *name, const struct dom_sid *sid)
170{
171 ndr_print_dom_sid(ndr, name, sid);
172}
173
174
175/*
176 parse a dom_sid2 - this is a dom_sid but with an extra copy of the num_auths field
177*/
178enum ndr_err_code ndr_pull_dom_sid2(struct ndr_pull *ndr, int ndr_flags, struct dom_sid *sid)
179{
180 uint32_t num_auths;
181 if (!(ndr_flags & NDR_SCALARS)) {
182 return NDR_ERR_SUCCESS;
183 }
184 NDR_CHECK(ndr_pull_uint3264(ndr, NDR_SCALARS, &num_auths));
185 NDR_CHECK(ndr_pull_dom_sid(ndr, ndr_flags, sid));
186 if (sid->num_auths != num_auths) {
187 return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
188 "Bad array size %u should exceed %u",
189 num_auths, sid->num_auths);
190 }
191 return NDR_ERR_SUCCESS;
192}
193
194/*
195 parse a dom_sid2 - this is a dom_sid but with an extra copy of the num_auths field
196*/
197enum ndr_err_code ndr_push_dom_sid2(struct ndr_push *ndr, int ndr_flags, const struct dom_sid *sid)
198{
199 if (!(ndr_flags & NDR_SCALARS)) {
200 return NDR_ERR_SUCCESS;
201 }
202 NDR_CHECK(ndr_push_uint3264(ndr, NDR_SCALARS, sid->num_auths));
203 return ndr_push_dom_sid(ndr, ndr_flags, sid);
204}
205
206/*
207 parse a dom_sid28 - this is a dom_sid in a fixed 28 byte buffer, so we need to ensure there are only upto 5 sub_auth
208*/
209enum ndr_err_code ndr_pull_dom_sid28(struct ndr_pull *ndr, int ndr_flags, struct dom_sid *sid)
210{
211 enum ndr_err_code status;
212 struct ndr_pull *subndr;
213
214 if (!(ndr_flags & NDR_SCALARS)) {
215 return NDR_ERR_SUCCESS;
216 }
217
218 subndr = talloc_zero(ndr, struct ndr_pull);
219 NDR_ERR_HAVE_NO_MEMORY(subndr);
220 subndr->flags = ndr->flags;
221 subndr->current_mem_ctx = ndr->current_mem_ctx;
222
223 subndr->data = ndr->data + ndr->offset;
224 subndr->data_size = 28;
225 subndr->offset = 0;
226
227 NDR_CHECK(ndr_pull_advance(ndr, 28));
228
229 status = ndr_pull_dom_sid(subndr, ndr_flags, sid);
230 if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
231 /* handle a w2k bug which send random data in the buffer */
232 ZERO_STRUCTP(sid);
233 } else if (sid->num_auths == 0 && sid->sub_auths) {
234 ZERO_STRUCT(sid->sub_auths);
235 }
236
237 return NDR_ERR_SUCCESS;
238}
239
240/*
241 push a dom_sid28 - this is a dom_sid in a 28 byte fixed buffer
242*/
243enum ndr_err_code ndr_push_dom_sid28(struct ndr_push *ndr, int ndr_flags, const struct dom_sid *sid)
244{
245 uint32_t old_offset;
246 uint32_t padding;
247
248 if (!(ndr_flags & NDR_SCALARS)) {
249 return NDR_ERR_SUCCESS;
250 }
251
252 if (sid->num_auths > 5) {
253 return ndr_push_error(ndr, NDR_ERR_RANGE,
254 "dom_sid28 allows only upto 5 sub auth [%u]",
255 sid->num_auths);
256 }
257
258 old_offset = ndr->offset;
259 NDR_CHECK(ndr_push_dom_sid(ndr, ndr_flags, sid));
260
261 padding = 28 - (ndr->offset - old_offset);
262
263 if (padding > 0) {
264 NDR_CHECK(ndr_push_zero(ndr, padding));
265 }
266
267 return NDR_ERR_SUCCESS;
268}
269
270/*
271 parse a dom_sid0 - this is a dom_sid in a variable byte buffer, which is maybe empty
272*/
273enum ndr_err_code ndr_pull_dom_sid0(struct ndr_pull *ndr, int ndr_flags, struct dom_sid *sid)
274{
275 if (!(ndr_flags & NDR_SCALARS)) {
276 return NDR_ERR_SUCCESS;
277 }
278
279 if (ndr->data_size == ndr->offset) {
280 ZERO_STRUCTP(sid);
281 return NDR_ERR_SUCCESS;
282 }
283
284 return ndr_pull_dom_sid(ndr, ndr_flags, sid);
285}
286
287/*
288 push a dom_sid0 - this is a dom_sid in a variable byte buffer, which is maybe empty
289*/
290enum ndr_err_code ndr_push_dom_sid0(struct ndr_push *ndr, int ndr_flags, const struct dom_sid *sid)
291{
292 struct dom_sid zero_sid;
293
294 if (!(ndr_flags & NDR_SCALARS)) {
295 return NDR_ERR_SUCCESS;
296 }
297
298 if (!sid) {
299 return NDR_ERR_SUCCESS;
300 }
301
302 ZERO_STRUCT(zero_sid);
303
304 if (memcmp(&zero_sid, sid, sizeof(zero_sid)) == 0) {
305 return NDR_ERR_SUCCESS;
306 }
307
308 return ndr_push_dom_sid(ndr, ndr_flags, sid);
309}
310
311_PUBLIC_ enum ndr_err_code ndr_push_dom_sid(struct ndr_push *ndr, int ndr_flags, const struct dom_sid *r)
312{
313 uint32_t cntr_sub_auths_0;
314 if (ndr_flags & NDR_SCALARS) {
315 NDR_CHECK(ndr_push_align(ndr, 4));
316 NDR_CHECK(ndr_push_uint8(ndr, NDR_SCALARS, r->sid_rev_num));
317 NDR_CHECK(ndr_push_int8(ndr, NDR_SCALARS, r->num_auths));
318 NDR_CHECK(ndr_push_array_uint8(ndr, NDR_SCALARS, r->id_auth, 6));
319 for (cntr_sub_auths_0 = 0; cntr_sub_auths_0 < r->num_auths; cntr_sub_auths_0++) {
320 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, r->sub_auths[cntr_sub_auths_0]));
321 }
322 }
323 return NDR_ERR_SUCCESS;
324}
325
326_PUBLIC_ enum ndr_err_code ndr_pull_dom_sid(struct ndr_pull *ndr, int ndr_flags, struct dom_sid *r)
327{
328 uint32_t cntr_sub_auths_0;
329 if (ndr_flags & NDR_SCALARS) {
330 NDR_CHECK(ndr_pull_align(ndr, 4));
331 NDR_CHECK(ndr_pull_uint8(ndr, NDR_SCALARS, &r->sid_rev_num));
332 NDR_CHECK(ndr_pull_int8(ndr, NDR_SCALARS, &r->num_auths));
333 if (r->num_auths < 0 || r->num_auths > 15) {
334 return ndr_pull_error(ndr, NDR_ERR_RANGE, "value out of range");
335 }
336 NDR_CHECK(ndr_pull_array_uint8(ndr, NDR_SCALARS, r->id_auth, 6));
337 for (cntr_sub_auths_0 = 0; cntr_sub_auths_0 < r->num_auths; cntr_sub_auths_0++) {
338 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &r->sub_auths[cntr_sub_auths_0]));
339 }
340 }
341 return NDR_ERR_SUCCESS;
342}
Note: See TracBrowser for help on using the repository browser.