tevent: avoid any operation on epoll_ev after a epoll_panic()
[Samba/gebeck_regimport.git] / librpc / ndr / ndr_sec_helper.c
blobea082d148dd26eec25a7b94eca6f0eebea5bee78
1 /*
2 Unix SMB/CIFS implementation.
4 fast routines for getting the wire size of security objects
6 Copyright (C) Andrew Tridgell 2003
7 Copyright (C) Stefan Metzmacher 2006-2008
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.
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.
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/>.
24 #include "includes.h"
25 #include "librpc/gen_ndr/ndr_security.h"
26 #include "../libcli/security/security.h"
29 return the wire size of a security_ace
31 size_t ndr_size_security_ace(const struct security_ace *ace, int flags)
33 size_t ret;
35 if (!ace) return 0;
37 ret = 8 + ndr_size_dom_sid(&ace->trustee, flags);
39 switch (ace->type) {
40 case SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT:
41 case SEC_ACE_TYPE_ACCESS_DENIED_OBJECT:
42 case SEC_ACE_TYPE_SYSTEM_AUDIT_OBJECT:
43 case SEC_ACE_TYPE_SYSTEM_ALARM_OBJECT:
44 ret += 4; /* uint32 bitmap ace->object.object.flags */
45 if (ace->object.object.flags & SEC_ACE_OBJECT_TYPE_PRESENT) {
46 ret += 16; /* GUID ace->object.object.type.type */
48 if (ace->object.object.flags & SEC_ACE_INHERITED_OBJECT_TYPE_PRESENT) {
49 ret += 16; /* GUID ace->object.object.inherited_typeinherited_type */
51 break;
52 default:
53 break;
56 return ret;
59 enum ndr_err_code ndr_pull_security_ace(struct ndr_pull *ndr, int ndr_flags, struct security_ace *r)
61 if (ndr_flags & NDR_SCALARS) {
62 uint32_t start_ofs = ndr->offset;
63 uint32_t size = 0;
64 uint32_t pad = 0;
65 NDR_CHECK(ndr_pull_align(ndr, 4));
66 NDR_CHECK(ndr_pull_security_ace_type(ndr, NDR_SCALARS, &r->type));
67 NDR_CHECK(ndr_pull_security_ace_flags(ndr, NDR_SCALARS, &r->flags));
68 NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &r->size));
69 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &r->access_mask));
70 NDR_CHECK(ndr_pull_set_switch_value(ndr, &r->object, r->type));
71 NDR_CHECK(ndr_pull_security_ace_object_ctr(ndr, NDR_SCALARS, &r->object));
72 NDR_CHECK(ndr_pull_dom_sid(ndr, NDR_SCALARS, &r->trustee));
73 size = ndr->offset - start_ofs;
74 if (r->size < size) {
75 return ndr_pull_error(ndr, NDR_ERR_BUFSIZE,
76 "ndr_pull_security_ace: r->size %u < size %u",
77 (unsigned)r->size, size);
79 pad = r->size - size;
80 NDR_PULL_NEED_BYTES(ndr, pad);
81 ndr->offset += pad;
83 if (ndr_flags & NDR_BUFFERS) {
84 NDR_CHECK(ndr_pull_security_ace_object_ctr(ndr, NDR_BUFFERS, &r->object));
86 return NDR_ERR_SUCCESS;
90 return the wire size of a security_acl
92 size_t ndr_size_security_acl(const struct security_acl *theacl, int flags)
94 size_t ret;
95 int i;
96 if (!theacl) return 0;
97 ret = 8;
98 for (i=0;i<theacl->num_aces;i++) {
99 ret += ndr_size_security_ace(&theacl->aces[i], flags);
101 return ret;
105 return the wire size of a security descriptor
107 size_t ndr_size_security_descriptor(const struct security_descriptor *sd, int flags)
109 size_t ret;
110 if (!sd) return 0;
112 ret = 20;
113 ret += ndr_size_dom_sid(sd->owner_sid, flags);
114 ret += ndr_size_dom_sid(sd->group_sid, flags);
115 ret += ndr_size_security_acl(sd->dacl, flags);
116 ret += ndr_size_security_acl(sd->sacl, flags);
117 return ret;
121 return the wire size of a dom_sid
123 size_t ndr_size_dom_sid(const struct dom_sid *sid, int flags)
125 if (!sid) return 0;
126 return 8 + 4*sid->num_auths;
129 size_t ndr_size_dom_sid28(const struct dom_sid *sid, int flags)
131 struct dom_sid zero_sid;
133 if (!sid) return 0;
135 ZERO_STRUCT(zero_sid);
137 if (memcmp(&zero_sid, sid, sizeof(zero_sid)) == 0) {
138 return 0;
141 return 8 + 4*sid->num_auths;
144 size_t ndr_size_dom_sid0(const struct dom_sid *sid, int flags)
146 return ndr_size_dom_sid28(sid, flags);
150 print a dom_sid
152 void ndr_print_dom_sid(struct ndr_print *ndr, const char *name, const struct dom_sid *sid)
154 ndr->print(ndr, "%-25s: %s", name, dom_sid_string(ndr, sid));
157 void ndr_print_dom_sid2(struct ndr_print *ndr, const char *name, const struct dom_sid *sid)
159 ndr_print_dom_sid(ndr, name, sid);
162 void ndr_print_dom_sid28(struct ndr_print *ndr, const char *name, const struct dom_sid *sid)
164 ndr_print_dom_sid(ndr, name, sid);
167 void ndr_print_dom_sid0(struct ndr_print *ndr, const char *name, const struct dom_sid *sid)
169 ndr_print_dom_sid(ndr, name, sid);
174 parse a dom_sid2 - this is a dom_sid but with an extra copy of the num_auths field
176 enum ndr_err_code ndr_pull_dom_sid2(struct ndr_pull *ndr, int ndr_flags, struct dom_sid *sid)
178 uint32_t num_auths;
179 if (!(ndr_flags & NDR_SCALARS)) {
180 return NDR_ERR_SUCCESS;
182 NDR_CHECK(ndr_pull_uint3264(ndr, NDR_SCALARS, &num_auths));
183 NDR_CHECK(ndr_pull_dom_sid(ndr, ndr_flags, sid));
184 if (sid->num_auths != num_auths) {
185 return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
186 "Bad array size %u should exceed %u",
187 num_auths, sid->num_auths);
189 return NDR_ERR_SUCCESS;
193 parse a dom_sid2 - this is a dom_sid but with an extra copy of the num_auths field
195 enum ndr_err_code ndr_push_dom_sid2(struct ndr_push *ndr, int ndr_flags, const struct dom_sid *sid)
197 if (!(ndr_flags & NDR_SCALARS)) {
198 return NDR_ERR_SUCCESS;
200 NDR_CHECK(ndr_push_uint3264(ndr, NDR_SCALARS, sid->num_auths));
201 return ndr_push_dom_sid(ndr, ndr_flags, sid);
205 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
207 enum ndr_err_code ndr_pull_dom_sid28(struct ndr_pull *ndr, int ndr_flags, struct dom_sid *sid)
209 enum ndr_err_code status;
210 struct ndr_pull *subndr;
212 if (!(ndr_flags & NDR_SCALARS)) {
213 return NDR_ERR_SUCCESS;
216 subndr = talloc_zero(ndr, struct ndr_pull);
217 NDR_ERR_HAVE_NO_MEMORY(subndr);
218 subndr->flags = ndr->flags;
219 subndr->current_mem_ctx = ndr->current_mem_ctx;
221 subndr->data = ndr->data + ndr->offset;
222 subndr->data_size = 28;
223 subndr->offset = 0;
225 NDR_CHECK(ndr_pull_advance(ndr, 28));
227 status = ndr_pull_dom_sid(subndr, ndr_flags, sid);
228 if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
229 /* handle a w2k bug which send random data in the buffer */
230 ZERO_STRUCTP(sid);
231 } else if (sid->num_auths == 0) {
232 ZERO_STRUCT(sid->sub_auths);
235 return NDR_ERR_SUCCESS;
239 push a dom_sid28 - this is a dom_sid in a 28 byte fixed buffer
241 enum ndr_err_code ndr_push_dom_sid28(struct ndr_push *ndr, int ndr_flags, const struct dom_sid *sid)
243 uint32_t old_offset;
244 uint32_t padding;
246 if (!(ndr_flags & NDR_SCALARS)) {
247 return NDR_ERR_SUCCESS;
250 if (sid->num_auths > 5) {
251 return ndr_push_error(ndr, NDR_ERR_RANGE,
252 "dom_sid28 allows only upto 5 sub auth [%u]",
253 sid->num_auths);
256 old_offset = ndr->offset;
257 NDR_CHECK(ndr_push_dom_sid(ndr, ndr_flags, sid));
259 padding = 28 - (ndr->offset - old_offset);
261 if (padding > 0) {
262 NDR_CHECK(ndr_push_zero(ndr, padding));
265 return NDR_ERR_SUCCESS;
269 parse a dom_sid0 - this is a dom_sid in a variable byte buffer, which is maybe empty
271 enum ndr_err_code ndr_pull_dom_sid0(struct ndr_pull *ndr, int ndr_flags, struct dom_sid *sid)
273 if (!(ndr_flags & NDR_SCALARS)) {
274 return NDR_ERR_SUCCESS;
277 if (ndr->data_size == ndr->offset) {
278 ZERO_STRUCTP(sid);
279 return NDR_ERR_SUCCESS;
282 return ndr_pull_dom_sid(ndr, ndr_flags, sid);
286 push a dom_sid0 - this is a dom_sid in a variable byte buffer, which is maybe empty
288 enum ndr_err_code ndr_push_dom_sid0(struct ndr_push *ndr, int ndr_flags, const struct dom_sid *sid)
290 struct dom_sid zero_sid;
292 if (!(ndr_flags & NDR_SCALARS)) {
293 return NDR_ERR_SUCCESS;
296 if (!sid) {
297 return NDR_ERR_SUCCESS;
300 ZERO_STRUCT(zero_sid);
302 if (memcmp(&zero_sid, sid, sizeof(zero_sid)) == 0) {
303 return NDR_ERR_SUCCESS;
306 return ndr_push_dom_sid(ndr, ndr_flags, sid);
309 _PUBLIC_ enum ndr_err_code ndr_push_dom_sid(struct ndr_push *ndr, int ndr_flags, const struct dom_sid *r)
311 uint32_t cntr_sub_auths_0;
312 if (ndr_flags & NDR_SCALARS) {
313 NDR_CHECK(ndr_push_align(ndr, 4));
314 NDR_CHECK(ndr_push_uint8(ndr, NDR_SCALARS, r->sid_rev_num));
315 NDR_CHECK(ndr_push_int8(ndr, NDR_SCALARS, r->num_auths));
316 NDR_CHECK(ndr_push_array_uint8(ndr, NDR_SCALARS, r->id_auth, 6));
317 if (r->num_auths < 0 || r->num_auths > ARRAY_SIZE(r->sub_auths)) {
318 return ndr_push_error(ndr, NDR_ERR_RANGE, "value out of range");
320 for (cntr_sub_auths_0 = 0; cntr_sub_auths_0 < r->num_auths; cntr_sub_auths_0++) {
321 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, r->sub_auths[cntr_sub_auths_0]));
324 return NDR_ERR_SUCCESS;
327 _PUBLIC_ enum ndr_err_code ndr_pull_dom_sid(struct ndr_pull *ndr, int ndr_flags, struct dom_sid *r)
329 uint32_t cntr_sub_auths_0;
330 if (ndr_flags & NDR_SCALARS) {
331 NDR_CHECK(ndr_pull_align(ndr, 4));
332 NDR_CHECK(ndr_pull_uint8(ndr, NDR_SCALARS, &r->sid_rev_num));
333 NDR_CHECK(ndr_pull_int8(ndr, NDR_SCALARS, &r->num_auths));
334 if (r->num_auths < 0 || r->num_auths > ARRAY_SIZE(r->sub_auths)) {
335 return ndr_pull_error(ndr, NDR_ERR_RANGE, "value out of range");
337 NDR_CHECK(ndr_pull_array_uint8(ndr, NDR_SCALARS, r->id_auth, 6));
338 ZERO_STRUCT(r->sub_auths);
339 for (cntr_sub_auths_0 = 0; cntr_sub_auths_0 < r->num_auths; cntr_sub_auths_0++) {
340 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &r->sub_auths[cntr_sub_auths_0]));
343 return NDR_ERR_SUCCESS;