Line data Source code
1 : /*
2 : * Unix SMB implementation.
3 : * Utility functions for converting between claims formats.
4 : *
5 : * This program is free software; you can redistribute it and/or modify
6 : * it under the terms of the GNU General Public License as published by
7 : * the Free Software Foundation; either version 3 of the License, or
8 : * (at your option) any later version.
9 : *
10 : * This program is distributed in the hope that it will be useful,
11 : * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 : * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 : * GNU General Public License for more details.
14 : *
15 : * You should have received a copy of the GNU General Public License
16 : * along with this program; if not, see <http://www.gnu.org/licenses/>.
17 : */
18 :
19 : #include "replace.h"
20 : #include "librpc/gen_ndr/ndr_security.h"
21 : #include "librpc/gen_ndr/ndr_conditional_ace.h"
22 : #include "libcli/security/claims-conversions.h"
23 : #include "lib/util/debug.h"
24 : #include "lib/util/stable_sort.h"
25 :
26 : #include "librpc/gen_ndr/conditional_ace.h"
27 : #include "librpc/gen_ndr/claims.h"
28 :
29 : /*
30 : * We support three formats for claims, all slightly different.
31 : *
32 : * 1. MS-ADTS 2.2.18.* claims sets, blobs, arrays, or whatever, which
33 : * are used in the PAC.
34 : *
35 : * 2. MS-DTYP 2.4.10.1 CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1
36 : * structures, used in security tokens and resource SACL ACEs.
37 : *
38 : * 3. MS-DTYP 2.4.4.17 Conditional ACE tokens.
39 : *
40 : * The types don't map perfectly onto each other -- in particular,
41 : * Conditional ACEs don't have unsigned integer or boolean types, but
42 : * do have short integer types which the other forms don't.
43 : *
44 : * We don't support the format used by the Win32 API function
45 : * AddResourceAttributeAce(), which is called CLAIM_SECURITY_ATTRIBUTE_V1.
46 : * Nobody has ever used that function in public, and the format is not used
47 : * on the wire.
48 : */
49 :
50 :
51 4929 : static bool claim_v1_string_to_ace_string(
52 : TALLOC_CTX *mem_ctx,
53 : const struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *claim,
54 : size_t offset,
55 : struct ace_condition_token *result)
56 : {
57 9431 : char *s = talloc_strdup(mem_ctx,
58 4929 : claim->values[offset].string_value);
59 4929 : if (s == NULL) {
60 0 : return false;
61 : }
62 :
63 4929 : result->type = CONDITIONAL_ACE_TOKEN_UNICODE;
64 4929 : result->data.unicode.value = s;
65 4929 : return true;
66 : }
67 :
68 :
69 6 : static bool claim_v1_octet_string_to_ace_octet_string(
70 : TALLOC_CTX *mem_ctx,
71 : const struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *claim,
72 : size_t offset,
73 : struct ace_condition_token *result)
74 : {
75 6 : DATA_BLOB *v = NULL;
76 6 : DATA_BLOB w = data_blob_null;
77 :
78 6 : v = claim->values[offset].octet_value;
79 :
80 6 : if (v->length > CONDITIONAL_ACE_MAX_LENGTH) {
81 0 : DBG_WARNING("claim has octet string of unexpected length %zu "
82 : "(expected range 1 - %u)\n",
83 : v->length, CONDITIONAL_ACE_MAX_LENGTH);
84 0 : return false;
85 : }
86 6 : if (v->length != 0) {
87 6 : w = data_blob_talloc(mem_ctx, v->data, v->length);
88 6 : if (w.data == NULL) {
89 0 : return false;
90 : }
91 : }
92 :
93 6 : result->type = CONDITIONAL_ACE_TOKEN_OCTET_STRING;
94 6 : result->data.bytes = w;
95 6 : return true;
96 : }
97 :
98 :
99 34 : static bool blob_string_sid_to_sid(DATA_BLOB *blob,
100 : struct dom_sid *sid)
101 : {
102 : /*
103 : * Resource ACE claim SIDs are stored as SID strings in
104 : * CLAIM_SECURITY_ATTRIBUTE_OCTET_STRING_RELATIVE blobs. These are in
105 : * ACEs, which means we don't quite know who wrote them, and it is
106 : * unspecified whether the blob should contain a terminating NUL byte.
107 : * Therefore we accept either form, copying into a temporary buffer if
108 : * there is no '\0'. Apart from this special case, we don't accept
109 : * SIDs that are shorter than the blob.
110 : *
111 : * It doesn't seem like SDDL short SIDs ("WD") are accepted here. This
112 : * isn't SDDL.
113 : */
114 34 : bool ok;
115 34 : size_t len = blob->length;
116 34 : char buf[DOM_SID_STR_BUFLEN + 1]; /* 191 + 1 */
117 34 : const char *end = NULL;
118 34 : char *str = NULL;
119 :
120 34 : if (len < 5 || len >= DOM_SID_STR_BUFLEN) {
121 0 : return false;
122 : }
123 34 : if (blob->data[len - 1] == '\0') {
124 0 : str = (char *)blob->data;
125 0 : len--;
126 : } else {
127 34 : memcpy(buf, blob->data, len);
128 34 : buf[len] = 0;
129 34 : str = buf;
130 : }
131 :
132 34 : ok = dom_sid_parse_endp(str, sid, &end);
133 34 : if (!ok) {
134 0 : return false;
135 : }
136 :
137 34 : if (end - str != len) {
138 0 : return false;
139 : }
140 0 : return true;
141 : }
142 :
143 :
144 8 : static bool claim_v1_sid_to_ace_sid(
145 : const struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *claim,
146 : size_t offset,
147 : struct ace_condition_token *result)
148 : {
149 : /*
150 : * In the _V1 struct, SIDs are stored as octet string blobs,
151 : * as *SID strings*.
152 : *
153 : * In the conditional ACE they are stored as struct dom_sid.
154 : *
155 : * There are no SIDs in ADTS claims, but there can be in
156 : * resource ACEs.
157 : */
158 8 : DATA_BLOB *v = NULL;
159 8 : bool ok;
160 :
161 8 : v = claim->values[offset].sid_value;
162 :
163 8 : ok = blob_string_sid_to_sid(v, &result->data.sid.sid);
164 8 : if (! ok) {
165 0 : DBG_WARNING("claim has invalid SID string of length %zu.\n",
166 : v->length);
167 0 : return false;
168 : }
169 :
170 8 : result->type = CONDITIONAL_ACE_TOKEN_SID;
171 8 : return true;
172 : }
173 :
174 :
175 13 : static bool claim_v1_int_to_ace_int(
176 : const struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *claim,
177 : size_t offset,
178 : struct ace_condition_token *result)
179 : {
180 13 : int64_t v = *claim->values[offset].int_value;
181 13 : result->type = CONDITIONAL_ACE_TOKEN_INT64;
182 13 : result->data.int64.base = CONDITIONAL_ACE_INT_BASE_10;
183 13 : result->data.int64.value = v;
184 :
185 : /*
186 : * The sign flag (and the base flag above) determines how the
187 : * ACE token will be displayed if converted to SDDL. These
188 : * values are not likely to end up as SDDL, but we might as
189 : * well get it right. A negative flag means it will be
190 : * displayed with a minus sign, and a positive flag means a
191 : * plus sign is shown. The none flag means no + or -.
192 : */
193 13 : if (v < 0) {
194 0 : result->data.int64.sign = CONDITIONAL_ACE_INT_SIGN_NEGATIVE;
195 : } else {
196 13 : result->data.int64.sign = CONDITIONAL_ACE_INT_SIGN_NONE;
197 : }
198 :
199 11 : return true;
200 : }
201 :
202 :
203 26 : static bool claim_v1_unsigned_int_to_ace_int(
204 : const struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *claim,
205 : size_t offset,
206 : struct ace_condition_token *result)
207 : {
208 26 : uint64_t v = *claim->values[offset].uint_value;
209 26 : if (v > INT64_MAX) {
210 : /*
211 : * The unsigned value can't be represented in a
212 : * conditional ACE type.
213 : *
214 : * XXX or can it? does the positive flag make it
215 : * unsigned?
216 : */
217 0 : return false;
218 : }
219 26 : result->type = CONDITIONAL_ACE_TOKEN_INT64;
220 26 : result->data.int64.base = CONDITIONAL_ACE_INT_BASE_10;
221 26 : result->data.int64.sign = CONDITIONAL_ACE_INT_SIGN_POSITIVE;
222 26 : result->data.int64.value = v;
223 26 : return true;
224 : }
225 :
226 :
227 54 : static bool claim_v1_bool_to_ace_int(
228 : const struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *claim,
229 : size_t offset,
230 : struct ace_condition_token *result)
231 : {
232 54 : uint64_t v = *claim->values[offset].uint_value;
233 54 : result->type = CONDITIONAL_ACE_TOKEN_INT64;
234 54 : result->data.int64.base = CONDITIONAL_ACE_INT_BASE_10;
235 54 : result->data.int64.sign = CONDITIONAL_ACE_INT_SIGN_NONE;
236 54 : result->data.int64.value = v ? 1 : 0;
237 54 : return true;
238 : }
239 :
240 :
241 5036 : static bool claim_v1_offset_to_ace_token(
242 : TALLOC_CTX *mem_ctx,
243 : const struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *claim,
244 : size_t offset,
245 : struct ace_condition_token *result)
246 : {
247 : /*
248 : * A claim structure has an array of claims of a certain type,
249 : * and this converts a single one into a conditional ACE token.
250 : *
251 : * For example, if offset is 3, claim->values[3] will be
252 : * turned into *result.
253 : *
254 : * conditional ace token will have flags to indicate that it
255 : * comes from a claim attribute, and whether or not that
256 : * attribute should be compared case-sensitively (only
257 : * affecting unicode strings).
258 : *
259 : * The CLAIM_SECURITY_ATTRIBUTE_CASE_SENSITIVE (from the
260 : * claim_flags enum in security.idl) is used for both.
261 : */
262 5036 : uint8_t f = claim->flags & CLAIM_SECURITY_ATTRIBUTE_VALUE_CASE_SENSITIVE;
263 5036 : result->flags = f | CONDITIONAL_ACE_FLAG_TOKEN_FROM_ATTR;
264 :
265 5036 : switch (claim->value_type) {
266 11 : case CLAIM_SECURITY_ATTRIBUTE_TYPE_INT64:
267 13 : return claim_v1_int_to_ace_int(claim, offset, result);
268 25 : case CLAIM_SECURITY_ATTRIBUTE_TYPE_UINT64:
269 26 : return claim_v1_unsigned_int_to_ace_int(claim, offset, result);
270 427 : case CLAIM_SECURITY_ATTRIBUTE_TYPE_STRING:
271 4929 : return claim_v1_string_to_ace_string(mem_ctx, claim, offset,
272 : result);
273 8 : case CLAIM_SECURITY_ATTRIBUTE_TYPE_SID:
274 8 : return claim_v1_sid_to_ace_sid(claim, offset, result);
275 54 : case CLAIM_SECURITY_ATTRIBUTE_TYPE_BOOLEAN:
276 54 : return claim_v1_bool_to_ace_int(claim, offset, result);
277 6 : case CLAIM_SECURITY_ATTRIBUTE_TYPE_OCTET_STRING:
278 6 : return claim_v1_octet_string_to_ace_octet_string(mem_ctx,
279 : claim,
280 : offset,
281 : result);
282 0 : default:
283 0 : return false;
284 : }
285 : }
286 :
287 :
288 : static bool claim_v1_copy(
289 : TALLOC_CTX *mem_ctx,
290 : struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *dest,
291 : const struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *src);
292 :
293 :
294 :
295 203 : bool claim_v1_to_ace_composite_unchecked(
296 : TALLOC_CTX *mem_ctx,
297 : const struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *claim,
298 : struct ace_condition_token *result)
299 : {
300 : /*
301 : * This converts a claim object into a conditional ACE
302 : * composite without checking whether it is a valid and sorted
303 : * claim. It is called in two places:
304 : *
305 : * 1. claim_v1_to_ace_token() below (which does do those
306 : * checks, and is the function you want).
307 : *
308 : * 2. sddl_resource_attr_from_claim() in which a resource
309 : * attribute claim needs to pass through a conditional ACE
310 : * composite structure on its way to becoming SDDL. In that
311 : * case we don't want to check validity.
312 : */
313 92 : size_t i;
314 203 : struct ace_condition_token *tokens = NULL;
315 92 : bool ok;
316 :
317 203 : tokens = talloc_array(mem_ctx,
318 : struct ace_condition_token,
319 : claim->value_count);
320 203 : if (tokens == NULL) {
321 0 : return false;
322 : }
323 :
324 4937 : for (i = 0; i < claim->value_count; i++) {
325 9228 : ok = claim_v1_offset_to_ace_token(tokens,
326 : claim,
327 : i,
328 4734 : &tokens[i]);
329 4734 : if (! ok) {
330 0 : TALLOC_FREE(tokens);
331 0 : return false;
332 : }
333 : }
334 :
335 203 : result->type = CONDITIONAL_ACE_TOKEN_COMPOSITE;
336 203 : result->data.composite.tokens = tokens;
337 203 : result->data.composite.n_members = claim->value_count;
338 203 : result->flags = claim->flags & CLAIM_SECURITY_ATTRIBUTE_VALUE_CASE_SENSITIVE;
339 203 : return true;
340 : }
341 :
342 :
343 512 : bool claim_v1_to_ace_token(TALLOC_CTX *mem_ctx,
344 : const struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *claim,
345 : struct ace_condition_token *result)
346 : {
347 512 : struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *claim_copy = NULL;
348 512 : const struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *sorted_claim = NULL;
349 117 : NTSTATUS status;
350 117 : bool ok;
351 512 : bool case_sensitive = claim->flags & \
352 : CLAIM_SECURITY_ATTRIBUTE_VALUE_CASE_SENSITIVE;
353 :
354 512 : if (claim->value_count < 1 ||
355 389 : claim->value_count >= CONDITIONAL_ACE_MAX_TOKENS) {
356 10 : DBG_WARNING("rejecting claim with %"PRIu32" tokens\n",
357 : claim->value_count);
358 10 : return false;
359 : }
360 : /*
361 : * if there is one, we return a single thing of that type; if
362 : * there are many, we return a composite.
363 : */
364 :
365 502 : if (claim->value_count == 1) {
366 302 : return claim_v1_offset_to_ace_token(mem_ctx,
367 : claim,
368 : 0,
369 : result);
370 : }
371 :
372 200 : if (claim->flags & CLAIM_SECURITY_ATTRIBUTE_UNIQUE_AND_SORTED) {
373 : /*
374 : * We can avoid making a sorted copy.
375 : *
376 : * This is normal case for wire claims, where the
377 : * sorting and duplicate checking happens earlier in
378 : * token_claims_to_claims_v1().
379 : */
380 111 : sorted_claim = claim;
381 : } else {
382 : /*
383 : * This is presumably a resource attribute ACE, which
384 : * is stored in the ACE as struct
385 : * CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1, and we don't
386 : * really want to mutate that copy -- even if there
387 : * aren't currently realistic pathways that read an
388 : * ACE, trigger this, and write it back (outside of
389 : * tests).
390 : */
391 62 : claim_copy = talloc(mem_ctx, struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1);
392 62 : if (claim_copy == NULL) {
393 0 : return false;
394 : }
395 :
396 62 : ok = claim_v1_copy(claim_copy, claim_copy, claim);
397 62 : if (!ok) {
398 0 : TALLOC_FREE(claim_copy);
399 0 : return false;
400 : }
401 :
402 62 : status = claim_v1_check_and_sort(claim_copy, claim_copy,
403 : case_sensitive);
404 62 : if (!NT_STATUS_IS_OK(status)) {
405 4 : DBG_WARNING("resource attribute claim sort failed with %s\n",
406 : nt_errstr(status));
407 4 : TALLOC_FREE(claim_copy);
408 4 : return false;
409 : }
410 0 : sorted_claim = claim_copy;
411 : }
412 196 : ok = claim_v1_to_ace_composite_unchecked(mem_ctx, sorted_claim, result);
413 196 : if (! ok) {
414 0 : TALLOC_FREE(claim_copy);
415 0 : return false;
416 : }
417 :
418 : /*
419 : * The multiple values will get turned into a composite
420 : * literal in the conditional ACE. Each element of the
421 : * composite will have flags set by
422 : * claim_v1_offset_to_ace_token(), but they also need to be
423 : * set here (at least the _FROM_ATTR flag) or the child values
424 : * will not be reached.
425 : */
426 196 : result->flags |= (
427 : CONDITIONAL_ACE_FLAG_TOKEN_FROM_ATTR |
428 : CLAIM_SECURITY_ATTRIBUTE_UNIQUE_AND_SORTED);
429 :
430 196 : return true;
431 : }
432 :
433 :
434 :
435 478 : static bool ace_int_to_claim_v1_int(TALLOC_CTX *mem_ctx,
436 : const struct ace_condition_token *tok,
437 : struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *claim,
438 : size_t offset)
439 : {
440 956 : int64_t *v = talloc(mem_ctx, int64_t);
441 478 : if (v == NULL) {
442 0 : return false;
443 : }
444 478 : *v = tok->data.int64.value;
445 478 : claim->values[offset].int_value = v;
446 478 : return true;
447 : }
448 :
449 :
450 356 : static bool ace_string_to_claim_v1_string(TALLOC_CTX *mem_ctx,
451 : const struct ace_condition_token *tok,
452 : struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *claim,
453 : size_t offset)
454 : {
455 712 : const char *s = talloc_strdup(mem_ctx,
456 356 : tok->data.unicode.value);
457 356 : if (s == NULL) {
458 0 : return false;
459 : }
460 356 : claim->values[offset].string_value = s;
461 356 : return true;
462 :
463 : }
464 :
465 :
466 11 : static bool ace_sid_to_claim_v1_sid(TALLOC_CTX *mem_ctx,
467 : const struct ace_condition_token *tok,
468 : struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *claim,
469 : size_t offset)
470 : {
471 : /* claim_v1 sid is an "S-1-*" string data blob, not struct dom_sid. */
472 11 : char *s = NULL;
473 :
474 11 : DATA_BLOB *blob = NULL;
475 11 : blob = talloc(mem_ctx, DATA_BLOB);
476 11 : if (blob == NULL) {
477 0 : return false;
478 : }
479 11 : s = dom_sid_string(blob, &tok->data.sid.sid);
480 11 : if (s == NULL) {
481 0 : TALLOC_FREE(blob);
482 0 : return false;
483 : }
484 11 : *blob = data_blob_string_const(s);
485 11 : claim->values[offset].sid_value = blob;
486 11 : return true;
487 : }
488 :
489 522 : static bool ace_octet_string_to_claim_v1_octet_string(
490 : TALLOC_CTX *mem_ctx,
491 : const struct ace_condition_token *tok,
492 : struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *claim,
493 : size_t offset)
494 : {
495 522 : DATA_BLOB *v = talloc(mem_ctx, DATA_BLOB);
496 522 : if (v == NULL) {
497 0 : return false;
498 : }
499 :
500 522 : *v = data_blob_talloc(v,
501 : tok->data.bytes.data,
502 : tok->data.bytes.length);
503 522 : if (v->data == NULL) {
504 0 : return false;
505 : }
506 :
507 522 : claim->values[offset].octet_value = v;
508 522 : return true;
509 : }
510 :
511 :
512 :
513 1367 : static bool ace_token_to_claim_v1_offset(TALLOC_CTX *mem_ctx,
514 : const struct ace_condition_token *tok,
515 : struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *claim,
516 : size_t offset)
517 : {
518 : /*
519 : * A claim structure has an array of claims of a certain type,
520 : * and this converts a single one into a conditional ACE token.
521 : *
522 : * For example, if offset is 3, claim->values[3] will be
523 : * turned into *result.
524 : */
525 1367 : if (offset >= claim->value_count) {
526 0 : return false;
527 : }
528 1367 : switch (claim->value_type) {
529 0 : case CLAIM_SECURITY_ATTRIBUTE_TYPE_INT64:
530 : case CLAIM_SECURITY_ATTRIBUTE_TYPE_UINT64:
531 478 : return ace_int_to_claim_v1_int(mem_ctx, tok, claim, offset);
532 0 : case CLAIM_SECURITY_ATTRIBUTE_TYPE_STRING:
533 356 : return ace_string_to_claim_v1_string(mem_ctx, tok, claim, offset);
534 11 : case CLAIM_SECURITY_ATTRIBUTE_TYPE_SID:
535 11 : return ace_sid_to_claim_v1_sid(mem_ctx, tok, claim, offset);
536 522 : case CLAIM_SECURITY_ATTRIBUTE_TYPE_OCTET_STRING:
537 522 : return ace_octet_string_to_claim_v1_octet_string(mem_ctx,
538 : tok,
539 : claim,
540 : offset);
541 0 : default:
542 : /*bool unimplemented, because unreachable */
543 0 : return false;
544 : }
545 : }
546 :
547 :
548 145 : bool ace_token_to_claim_v1(TALLOC_CTX *mem_ctx,
549 : const char *name,
550 : const struct ace_condition_token *tok,
551 : struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 **claim,
552 : uint32_t flags)
553 : {
554 145 : size_t i;
555 145 : bool ok;
556 145 : bool is_comp = false;
557 145 : int claim_type = -1;
558 145 : struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *_claim = NULL;
559 145 : uint32_t value_count;
560 :
561 145 : if (name == NULL || claim == NULL || tok == NULL) {
562 0 : return false;
563 : }
564 145 : *claim = NULL;
565 :
566 145 : if (tok->type == CONDITIONAL_ACE_TOKEN_COMPOSITE) {
567 102 : is_comp = true;
568 : /* there must be values, all of the same type */
569 102 : if (tok->data.composite.n_members == 0) {
570 0 : DBG_WARNING("Empty ACE composite list\n");
571 0 : return false;
572 : }
573 102 : if (tok->data.composite.n_members > 1) {
574 1324 : for (i = 1; i < tok->data.composite.n_members; i++) {
575 1222 : if (tok->data.composite.tokens[i].type !=
576 1222 : tok->data.composite.tokens[0].type) {
577 0 : DBG_WARNING(
578 : "ACE composite list has varying "
579 : "types (at least %u and %u)\n",
580 : tok->data.composite.tokens[i].type,
581 : tok->data.composite.tokens[0].type);
582 0 : return false;
583 : }
584 : }
585 : }
586 102 : value_count = tok->data.composite.n_members;
587 :
588 102 : switch (tok->data.composite.tokens[0].type) {
589 0 : case CONDITIONAL_ACE_TOKEN_INT8:
590 : case CONDITIONAL_ACE_TOKEN_INT16:
591 : case CONDITIONAL_ACE_TOKEN_INT32:
592 : case CONDITIONAL_ACE_TOKEN_INT64:
593 0 : claim_type = CLAIM_SECURITY_ATTRIBUTE_TYPE_INT64;
594 0 : break;
595 46 : case CONDITIONAL_ACE_TOKEN_UNICODE:
596 46 : claim_type = CLAIM_SECURITY_ATTRIBUTE_TYPE_STRING;
597 46 : break;
598 13 : case CONDITIONAL_ACE_TOKEN_OCTET_STRING:
599 13 : claim_type = CLAIM_SECURITY_ATTRIBUTE_TYPE_OCTET_STRING;
600 13 : break;
601 5 : case CONDITIONAL_ACE_TOKEN_SID:
602 5 : claim_type = CLAIM_SECURITY_ATTRIBUTE_TYPE_SID;
603 5 : break;
604 0 : default:
605 : /* reject nested composites, no uint or bool. */
606 0 : DBG_WARNING("ACE composite list has invalid type %u\n",
607 : tok->data.composite.tokens[0].type);
608 0 : return false;
609 : }
610 : } else {
611 43 : value_count = 1;
612 43 : switch(tok->type) {
613 0 : case CONDITIONAL_ACE_TOKEN_INT8:
614 : case CONDITIONAL_ACE_TOKEN_INT16:
615 : case CONDITIONAL_ACE_TOKEN_INT32:
616 : case CONDITIONAL_ACE_TOKEN_INT64:
617 0 : claim_type = CLAIM_SECURITY_ATTRIBUTE_TYPE_INT64;
618 0 : break;
619 21 : case CONDITIONAL_ACE_TOKEN_UNICODE:
620 21 : claim_type = CLAIM_SECURITY_ATTRIBUTE_TYPE_STRING;
621 21 : break;
622 1 : case CONDITIONAL_ACE_TOKEN_OCTET_STRING:
623 1 : claim_type = CLAIM_SECURITY_ATTRIBUTE_TYPE_OCTET_STRING;
624 1 : break;
625 0 : case CONDITIONAL_ACE_TOKEN_SID:
626 0 : claim_type = CLAIM_SECURITY_ATTRIBUTE_TYPE_SID;
627 0 : break;
628 0 : default:
629 : /*
630 : * no way of creating bool or uint values,
631 : * composite is handled above.
632 : */
633 0 : DBG_WARNING("ACE token has invalid type %u\n",
634 : tok->data.composite.tokens[0].type);
635 0 : return false;
636 : }
637 : }
638 :
639 145 : _claim = talloc(mem_ctx, struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1);
640 145 : if (_claim == NULL) {
641 0 : return false;
642 : }
643 :
644 145 : _claim->value_count = value_count;
645 145 : _claim->value_type = claim_type;
646 145 : _claim->flags = flags;
647 145 : _claim->name = talloc_strdup(mem_ctx, name);
648 145 : if (_claim->name == NULL) {
649 0 : TALLOC_FREE(_claim);
650 0 : return false;
651 : }
652 : /*
653 : * The values array is actually an array of pointers to
654 : * values, even when the values are ints or bools.
655 : */
656 145 : _claim->values = talloc_array(_claim, union claim_values, value_count);
657 145 : if (_claim->values == NULL) {
658 0 : TALLOC_FREE(_claim);
659 0 : return false;
660 : }
661 145 : if (! is_comp) {
662 : /* there is one value, not a list */
663 43 : ok = ace_token_to_claim_v1_offset(_claim,
664 : tok,
665 : _claim,
666 : 0);
667 43 : if (! ok) {
668 0 : TALLOC_FREE(_claim);
669 0 : return false;
670 : }
671 : } else {
672 : /* a composite list of values */
673 1426 : for (i = 0; i < value_count; i++) {
674 1324 : struct ace_condition_token *t = &tok->data.composite.tokens[i];
675 1324 : ok = ace_token_to_claim_v1_offset(mem_ctx,
676 : t,
677 : _claim,
678 : i);
679 1324 : if (! ok) {
680 0 : TALLOC_FREE(_claim);
681 0 : return false;
682 : }
683 : }
684 : }
685 :
686 :
687 145 : if (_claim->value_type == CLAIM_SECURITY_ATTRIBUTE_TYPE_INT64) {
688 : /*
689 : * Conditional ACE tokens don't have a UINT type but
690 : * claims do. Windows tends to use UINT types in
691 : * claims when it can, so so do we.
692 : */
693 427 : bool could_be_uint = true;
694 427 : for (i = 0; i < value_count; i++) {
695 374 : if (*_claim->values[i].int_value < 0) {
696 0 : could_be_uint = false;
697 0 : break;
698 : }
699 : }
700 59 : if (could_be_uint) {
701 53 : _claim->value_type = CLAIM_SECURITY_ATTRIBUTE_TYPE_UINT64;
702 : }
703 : }
704 :
705 145 : *claim = _claim;
706 145 : return true;
707 : }
708 :
709 :
710 :
711 102 : static bool claim_v1_copy(
712 : TALLOC_CTX *mem_ctx,
713 : struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *dest,
714 : const struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *src)
715 : {
716 102 : DATA_BLOB blob = {0};
717 102 : enum ndr_err_code ndr_err;
718 :
719 : /*
720 : * FIXME, could be more efficient! but copying these
721 : * structures is fiddly, and it might be worth coming up
722 : * with a better API for adding claims.
723 : */
724 :
725 102 : ndr_err = ndr_push_struct_blob(
726 : &blob, mem_ctx, src,
727 : (ndr_push_flags_fn_t)ndr_push_CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1);
728 :
729 102 : if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
730 0 : return false;
731 : }
732 :
733 102 : ndr_err = ndr_pull_struct_blob(
734 : &blob, mem_ctx, dest,
735 : (ndr_pull_flags_fn_t)ndr_pull_CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1);
736 :
737 102 : if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
738 0 : TALLOC_FREE(blob.data);
739 0 : return false;
740 : }
741 102 : TALLOC_FREE(blob.data);
742 0 : return true;
743 : }
744 :
745 :
746 :
747 40 : bool add_claim_to_token(TALLOC_CTX *mem_ctx,
748 : struct security_token *token,
749 : const struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *claim,
750 : const char *claim_type)
751 : {
752 40 : struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *tmp = NULL;
753 40 : NTSTATUS status;
754 40 : uint32_t *n = NULL;
755 40 : bool ok;
756 40 : struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 **list = NULL;
757 40 : if (strcmp(claim_type, "device") == 0) {
758 38 : n = &token->num_device_claims;
759 38 : list = &token->device_claims;
760 2 : } else if (strcmp(claim_type, "local") == 0) {
761 0 : n = &token->num_local_claims;
762 0 : list = &token->local_claims;
763 2 : } else if (strcmp(claim_type, "user") == 0) {
764 2 : n = &token->num_user_claims;
765 2 : list = &token->user_claims;
766 : } else {
767 0 : return false;
768 : }
769 40 : if ((*n) == UINT32_MAX) {
770 0 : return false;
771 : }
772 :
773 40 : tmp = talloc_realloc(mem_ctx,
774 : *list,
775 : struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1,
776 : (*n) + 1);
777 40 : if (tmp == NULL) {
778 0 : return false;
779 : }
780 :
781 40 : ok = claim_v1_copy(mem_ctx, &tmp[*n], claim);
782 40 : if (! ok ) {
783 0 : TALLOC_FREE(tmp);
784 0 : return false;
785 : }
786 :
787 40 : status = claim_v1_check_and_sort(tmp, &tmp[*n],
788 40 : claim->flags & CLAIM_SECURITY_ATTRIBUTE_VALUE_CASE_SENSITIVE);
789 40 : if (!NT_STATUS_IS_OK(status)) {
790 2 : DBG_WARNING("resource attribute claim sort failed with %s\n",
791 : nt_errstr(status));
792 2 : TALLOC_FREE(tmp);
793 2 : return false;
794 : }
795 :
796 38 : (*n)++;
797 38 : *list = tmp;
798 38 : return true;
799 : }
800 :
801 :
802 54 : static NTSTATUS claim_v1_check_and_sort_boolean(
803 : TALLOC_CTX *mem_ctx,
804 : struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *claim)
805 : {
806 : /*
807 : * There are so few valid orders in a boolean claim that we can
808 : * enumerate them all.
809 : */
810 54 : switch (claim->value_count) {
811 4 : case 0:
812 49 : return NT_STATUS_OK;
813 44 : case 1:
814 44 : if (*claim->values[0].uint_value == 0 ||
815 23 : *claim->values[0].uint_value == 1) {
816 43 : return NT_STATUS_OK;
817 : }
818 1 : break;
819 6 : case 2:
820 6 : if (*claim->values[0].uint_value == 1) {
821 : /* switch the order. */
822 1 : *claim->values[0].uint_value = *claim->values[1].uint_value;
823 1 : *claim->values[1].uint_value = 1;
824 : }
825 6 : if (*claim->values[0].uint_value == 0 &&
826 6 : *claim->values[1].uint_value == 1) {
827 2 : return NT_STATUS_OK;
828 : }
829 4 : break;
830 0 : default:
831 : /* 3 or more must have duplicates. */
832 0 : break;
833 : }
834 5 : return NT_STATUS_INVALID_PARAMETER;
835 : }
836 :
837 :
838 : struct claim_sort_context {
839 : uint16_t value_type;
840 : bool failed;
841 : bool case_sensitive;
842 : };
843 :
844 929208 : static int claim_sort_cmp(const union claim_values *lhs,
845 : const union claim_values *rhs,
846 : struct claim_sort_context *ctx)
847 : {
848 : /*
849 : * These comparisons have to match those used in
850 : * conditional_ace.c.
851 : */
852 34458 : int cmp;
853 :
854 929208 : switch (ctx->value_type) {
855 894246 : case CLAIM_SECURITY_ATTRIBUTE_TYPE_INT64:
856 : case CLAIM_SECURITY_ATTRIBUTE_TYPE_UINT64:
857 : {
858 : /*
859 : * We sort as signed integers, even for uint64,
860 : * because a) we don't actually care about the true
861 : * order, just uniqueness, and b) the conditional ACEs
862 : * only know of signed values.
863 : */
864 0 : int64_t a, b;
865 894246 : if (ctx->value_type == CLAIM_SECURITY_ATTRIBUTE_TYPE_INT64) {
866 14 : a = *lhs->int_value;
867 14 : b = *rhs->int_value;
868 : } else {
869 894232 : a = (int64_t)*lhs->uint_value;
870 894232 : b = (int64_t)*rhs->uint_value;
871 : }
872 894246 : if (a < b) {
873 808504 : return -1;
874 : }
875 85742 : if (a == b) {
876 18 : return 0;
877 : }
878 85724 : return 1;
879 : }
880 34949 : case CLAIM_SECURITY_ATTRIBUTE_TYPE_STRING:
881 : {
882 34949 : const char *a = lhs->string_value;
883 34949 : const char *b = rhs->string_value;
884 34949 : if (ctx->case_sensitive) {
885 1359 : return strcmp(a, b);
886 : }
887 33590 : return strcasecmp_m(a, b);
888 : }
889 :
890 13 : case CLAIM_SECURITY_ATTRIBUTE_TYPE_SID:
891 : {
892 : /*
893 : * The blobs in a claim are "S-1-.." strings, not struct
894 : * dom_sid as used in conditional ACEs, and to sort them the
895 : * same as ACEs we need to make temporary structs.
896 : *
897 : * We don't accept SID claims over the wire -- these
898 : * are resource attribute ACEs only.
899 : */
900 13 : struct dom_sid a, b;
901 13 : bool lhs_ok, rhs_ok;
902 :
903 13 : lhs_ok = blob_string_sid_to_sid(lhs->sid_value, &a);
904 13 : rhs_ok = blob_string_sid_to_sid(rhs->sid_value, &b);
905 13 : if (!(lhs_ok && rhs_ok)) {
906 0 : ctx->failed = true;
907 0 : return -1;
908 : }
909 13 : cmp = dom_sid_compare(&a, &b);
910 13 : return cmp;
911 : }
912 0 : case CLAIM_SECURITY_ATTRIBUTE_TYPE_OCTET_STRING:
913 : {
914 0 : const DATA_BLOB *a = lhs->octet_value;
915 0 : const DATA_BLOB *b = rhs->octet_value;
916 0 : return data_blob_cmp(a, b);
917 : }
918 0 : default:
919 0 : ctx->failed = true;
920 0 : break;
921 : }
922 0 : return -1;
923 : }
924 :
925 :
926 861 : NTSTATUS claim_v1_check_and_sort(TALLOC_CTX *mem_ctx,
927 : struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *claim,
928 : bool case_sensitive)
929 : {
930 116 : bool ok;
931 116 : uint32_t i;
932 861 : struct claim_sort_context sort_ctx = {
933 : .failed = false,
934 861 : .value_type = claim->value_type,
935 : .case_sensitive = case_sensitive
936 : };
937 :
938 861 : if (claim->value_type == CLAIM_SECURITY_ATTRIBUTE_TYPE_BOOLEAN) {
939 54 : NTSTATUS status = claim_v1_check_and_sort_boolean(mem_ctx, claim);
940 54 : if (NT_STATUS_IS_OK(status)) {
941 49 : claim->flags |= CLAIM_SECURITY_ATTRIBUTE_UNIQUE_AND_SORTED;
942 : }
943 54 : return status;
944 : }
945 :
946 923 : ok = stable_sort_talloc_r(mem_ctx,
947 807 : claim->values,
948 807 : claim->value_count,
949 : sizeof(union claim_values),
950 : (samba_compare_with_context_fn_t)claim_sort_cmp,
951 : &sort_ctx);
952 807 : if (!ok) {
953 0 : return NT_STATUS_NO_MEMORY;
954 : }
955 :
956 807 : if (sort_ctx.failed) {
957 : /* this failure probably means a bad SID string */
958 0 : DBG_WARNING("claim sort of %"PRIu32" members, type %"PRIu16" failed\n",
959 : claim->value_count,
960 : claim->value_type);
961 0 : return NT_STATUS_INVALID_PARAMETER;
962 : }
963 :
964 105462 : for (i = 1; i < claim->value_count; i++) {
965 109082 : int cmp = claim_sort_cmp(&claim->values[i - 1],
966 104673 : &claim->values[i],
967 : &sort_ctx);
968 104673 : if (cmp == 0) {
969 18 : DBG_WARNING("duplicate values in claim\n");
970 18 : return NT_STATUS_INVALID_PARAMETER;
971 : }
972 104655 : if (cmp > 0) {
973 0 : DBG_ERR("claim sort failed!\n");
974 0 : return NT_STATUS_INVALID_PARAMETER;
975 : }
976 : }
977 789 : if (case_sensitive) {
978 8 : claim->flags |= CLAIM_SECURITY_ATTRIBUTE_VALUE_CASE_SENSITIVE;
979 : }
980 789 : claim->flags |= CLAIM_SECURITY_ATTRIBUTE_UNIQUE_AND_SORTED;
981 789 : return NT_STATUS_OK;
982 : }
983 :
984 :
985 304 : NTSTATUS token_claims_to_claims_v1(TALLOC_CTX *mem_ctx,
986 : const struct CLAIMS_SET *claims_set,
987 : struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 **out_claims,
988 : uint32_t *out_n_claims)
989 : {
990 304 : struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 *claims = NULL;
991 304 : uint32_t n_claims = 0;
992 304 : uint32_t expected_n_claims = 0;
993 6 : uint32_t i;
994 6 : NTSTATUS status;
995 :
996 304 : if (out_claims == NULL) {
997 0 : return NT_STATUS_INVALID_PARAMETER;
998 : }
999 304 : if (out_n_claims == NULL) {
1000 0 : return NT_STATUS_INVALID_PARAMETER;
1001 : }
1002 :
1003 304 : *out_claims = NULL;
1004 304 : *out_n_claims = 0;
1005 :
1006 304 : if (claims_set == NULL) {
1007 0 : return NT_STATUS_OK;
1008 : }
1009 :
1010 : /*
1011 : * The outgoing number of claims is (at most) the sum of the
1012 : * claims_counts of each claims_array.
1013 : */
1014 618 : for (i = 0; i < claims_set->claims_array_count; ++i) {
1015 314 : uint32_t count = claims_set->claims_arrays[i].claims_count;
1016 314 : expected_n_claims += count;
1017 314 : if (expected_n_claims < count) {
1018 0 : return NT_STATUS_INVALID_PARAMETER;
1019 : }
1020 : }
1021 :
1022 304 : claims = talloc_array(mem_ctx,
1023 : struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1,
1024 : expected_n_claims);
1025 304 : if (claims == NULL) {
1026 0 : return NT_STATUS_NO_MEMORY;
1027 : }
1028 :
1029 601 : for (i = 0; i < claims_set->claims_array_count; ++i) {
1030 314 : const struct CLAIMS_ARRAY *claims_array = &claims_set->claims_arrays[i];
1031 6 : uint32_t j;
1032 :
1033 314 : switch (claims_array->claims_source_type) {
1034 302 : case CLAIMS_SOURCE_TYPE_AD:
1035 : case CLAIMS_SOURCE_TYPE_CERTIFICATE:
1036 302 : break;
1037 7 : default:
1038 : /* Ignore any claims of a type we don’t recognize. */
1039 7 : continue;
1040 : }
1041 :
1042 1053 : for (j = 0; j < claims_array->claims_count; ++j) {
1043 763 : const struct CLAIM_ENTRY *claim_entry = &claims_array->claim_entries[j];
1044 763 : const char *name = NULL;
1045 763 : union claim_values *claim_values = NULL;
1046 14 : uint32_t n_values;
1047 14 : enum security_claim_value_type value_type;
1048 :
1049 763 : switch (claim_entry->type) {
1050 15 : case CLAIM_TYPE_INT64:
1051 : {
1052 15 : const struct CLAIM_INT64 *values = &claim_entry->values.claim_int64;
1053 0 : uint32_t k;
1054 15 : int64_t *claim_values_int64 = NULL;
1055 :
1056 15 : n_values = values->value_count;
1057 15 : value_type = CLAIM_SECURITY_ATTRIBUTE_TYPE_INT64;
1058 :
1059 15 : claim_values = talloc_array(claims,
1060 : union claim_values,
1061 : n_values);
1062 15 : if (claim_values == NULL) {
1063 0 : talloc_free(claims);
1064 0 : return NT_STATUS_NO_MEMORY;
1065 : }
1066 15 : claim_values_int64 = talloc_array(claims,
1067 : int64_t,
1068 : n_values);
1069 15 : if (claim_values_int64 == NULL) {
1070 0 : talloc_free(claims);
1071 0 : return NT_STATUS_NO_MEMORY;
1072 : }
1073 :
1074 36 : for (k = 0; k < n_values; ++k) {
1075 21 : claim_values_int64[k] = values->values[k];
1076 21 : claim_values[k].int_value = &claim_values_int64[k];
1077 : }
1078 :
1079 15 : break;
1080 : }
1081 81 : case CLAIM_TYPE_UINT64:
1082 : case CLAIM_TYPE_BOOLEAN:
1083 : {
1084 81 : const struct CLAIM_UINT64 *values = &claim_entry->values.claim_uint64;
1085 1 : uint32_t k;
1086 81 : uint64_t *claim_values_uint64 = NULL;
1087 :
1088 81 : n_values = values->value_count;
1089 162 : value_type = (claim_entry->type == CLAIM_TYPE_UINT64)
1090 : ? CLAIM_SECURITY_ATTRIBUTE_TYPE_UINT64
1091 81 : : CLAIM_SECURITY_ATTRIBUTE_TYPE_BOOLEAN;
1092 :
1093 81 : claim_values = talloc_array(claims,
1094 : union claim_values,
1095 : n_values);
1096 81 : if (claim_values == NULL) {
1097 0 : talloc_free(claims);
1098 0 : return NT_STATUS_NO_MEMORY;
1099 : }
1100 :
1101 81 : claim_values_uint64 = talloc_array(claims,
1102 : uint64_t,
1103 : n_values);
1104 81 : if (claim_values_uint64 == NULL) {
1105 0 : talloc_free(claims);
1106 0 : return NT_STATUS_NO_MEMORY;
1107 : }
1108 :
1109 100175 : for (k = 0; k < n_values; ++k) {
1110 100094 : claim_values_uint64[k] = values->values[k];
1111 100094 : claim_values[k].uint_value = &claim_values_uint64[k];
1112 : }
1113 :
1114 80 : break;
1115 : }
1116 663 : case CLAIM_TYPE_STRING:
1117 : {
1118 663 : const struct CLAIM_STRING *values = &claim_entry->values.claim_string;
1119 13 : uint32_t k, m;
1120 663 : bool seen_empty = false;
1121 663 : n_values = values->value_count;
1122 663 : value_type = CLAIM_SECURITY_ATTRIBUTE_TYPE_STRING;
1123 :
1124 663 : claim_values = talloc_array(claims,
1125 : union claim_values,
1126 : n_values);
1127 663 : if (claim_values == NULL) {
1128 0 : talloc_free(claims);
1129 0 : return NT_STATUS_NO_MEMORY;
1130 : }
1131 :
1132 650 : m = 0;
1133 1572 : for (k = 0; k < n_values; ++k) {
1134 909 : const char *string_value = NULL;
1135 :
1136 909 : if (values->values[k] != NULL) {
1137 909 : string_value = talloc_strdup(claim_values, values->values[k]);
1138 909 : if (string_value == NULL) {
1139 0 : talloc_free(claims);
1140 0 : return NT_STATUS_NO_MEMORY;
1141 : }
1142 909 : claim_values[m].string_value = string_value;
1143 909 : m++;
1144 : } else {
1145 : /*
1146 : * We allow one NULL string
1147 : * per claim, but not two,
1148 : * because two would be a
1149 : * duplicate, and we don't
1150 : * want those (duplicates in
1151 : * actual values are checked
1152 : * later).
1153 : */
1154 0 : if (seen_empty) {
1155 0 : talloc_free(claims);
1156 0 : return NT_STATUS_INVALID_PARAMETER;
1157 : }
1158 0 : seen_empty = true;
1159 : }
1160 : }
1161 650 : n_values = m;
1162 650 : break;
1163 : }
1164 4 : default:
1165 : /*
1166 : * Other claim types are unsupported — just skip
1167 : * them.
1168 : */
1169 4 : continue;
1170 : }
1171 :
1172 759 : if (claim_entry->id != NULL) {
1173 759 : name = talloc_strdup(claims, claim_entry->id);
1174 759 : if (name == NULL) {
1175 0 : talloc_free(claims);
1176 0 : return NT_STATUS_NO_MEMORY;
1177 : }
1178 : }
1179 :
1180 759 : claims[n_claims] = (struct CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1) {
1181 : .name = name,
1182 : .value_type = value_type,
1183 : .flags = 0,
1184 : .value_count = n_values,
1185 : .values = claim_values,
1186 : };
1187 :
1188 759 : status = claim_v1_check_and_sort(claims, &claims[n_claims],
1189 : false);
1190 759 : if (!NT_STATUS_IS_OK(status)) {
1191 17 : talloc_free(claims);
1192 17 : DBG_WARNING("claim sort and uniqueness test failed with %s\n",
1193 : nt_errstr(status));
1194 17 : return status;
1195 : }
1196 742 : n_claims++;
1197 : }
1198 : }
1199 287 : *out_claims = claims;
1200 287 : *out_n_claims = n_claims;
1201 :
1202 287 : return NT_STATUS_OK;
1203 : }
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