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1bdbdaff | 1 | /* |
3c2bdd7d | 2 | * Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved. |
1bdbdaff P |
3 | * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved. |
4 | * | |
5 | * Licensed under the Apache License 2.0 (the "License"). You may not use | |
6 | * this file except in compliance with the License. You can obtain a copy | |
7 | * in the file LICENSE in the source distribution or at | |
8 | * https://www.openssl.org/source/license.html | |
9 | */ | |
10 | ||
11 | #include <string.h> | |
12 | #include <stdio.h> | |
13 | #include <stdarg.h> | |
14 | #include <openssl/crypto.h> | |
15 | #include "internal/property.h" | |
25f2138b | 16 | #include "crypto/ctype.h" |
1bdbdaff P |
17 | #include <openssl/lhash.h> |
18 | #include <openssl/rand.h> | |
19 | #include "internal/thread_once.h" | |
25f2138b DMSP |
20 | #include "crypto/lhash.h" |
21 | #include "crypto/sparse_array.h" | |
706457b7 | 22 | #include "property_local.h" |
1bdbdaff | 23 | |
e5ecfcc7 P |
24 | /* |
25 | * The number of elements in the query cache before we initiate a flush. | |
26 | * If reducing this, also ensure the stochastic test in test/property_test.c | |
27 | * isn't likely to fail. | |
28 | */ | |
29 | #define IMPL_CACHE_FLUSH_THRESHOLD 500 | |
bdbf2df2 P |
30 | |
31 | typedef struct { | |
32 | void *method; | |
33 | int (*up_ref)(void *); | |
34 | void (*free)(void *); | |
35 | } METHOD; | |
1bdbdaff P |
36 | |
37 | typedef struct { | |
c1d56231 | 38 | const OSSL_PROVIDER *provider; |
1bdbdaff | 39 | OSSL_PROPERTY_LIST *properties; |
bdbf2df2 | 40 | METHOD method; |
1bdbdaff P |
41 | } IMPLEMENTATION; |
42 | ||
43 | DEFINE_STACK_OF(IMPLEMENTATION) | |
44 | ||
45 | typedef struct { | |
46 | const char *query; | |
bdbf2df2 | 47 | METHOD method; |
1bdbdaff P |
48 | char body[1]; |
49 | } QUERY; | |
50 | ||
51 | DEFINE_LHASH_OF(QUERY); | |
52 | ||
53 | typedef struct { | |
54 | int nid; | |
55 | STACK_OF(IMPLEMENTATION) *impls; | |
56 | LHASH_OF(QUERY) *cache; | |
57 | } ALGORITHM; | |
58 | ||
59 | struct ossl_method_store_st { | |
b4250010 | 60 | OSSL_LIB_CTX *ctx; |
1bdbdaff P |
61 | size_t nelem; |
62 | SPARSE_ARRAY_OF(ALGORITHM) *algs; | |
1bdbdaff | 63 | int need_flush; |
1bdbdaff P |
64 | CRYPTO_RWLOCK *lock; |
65 | }; | |
66 | ||
67 | typedef struct { | |
1bdbdaff P |
68 | LHASH_OF(QUERY) *cache; |
69 | size_t nelem; | |
f06cf3c4 | 70 | uint32_t seed; |
1bdbdaff P |
71 | } IMPL_CACHE_FLUSH; |
72 | ||
73 | DEFINE_SPARSE_ARRAY_OF(ALGORITHM); | |
74 | ||
75 | static void ossl_method_cache_flush(OSSL_METHOD_STORE *store, int nid); | |
f9e504e8 P |
76 | |
77 | /* Global properties are stored per library context */ | |
78 | static void ossl_ctx_global_properties_free(void *vstore) | |
79 | { | |
80 | OSSL_PROPERTY_LIST **plp = vstore; | |
81 | ||
82 | if (plp != NULL) { | |
83 | ossl_property_free(*plp); | |
84 | OPENSSL_free(plp); | |
85 | } | |
86 | } | |
87 | ||
b4250010 | 88 | static void *ossl_ctx_global_properties_new(OSSL_LIB_CTX *ctx) |
f9e504e8 P |
89 | { |
90 | return OPENSSL_zalloc(sizeof(OSSL_PROPERTY_LIST **)); | |
91 | } | |
92 | ||
93 | ||
b4250010 | 94 | static const OSSL_LIB_CTX_METHOD ossl_ctx_global_properties_method = { |
f9e504e8 P |
95 | ossl_ctx_global_properties_new, |
96 | ossl_ctx_global_properties_free, | |
97 | }; | |
98 | ||
b4250010 | 99 | OSSL_PROPERTY_LIST **ossl_ctx_global_properties(OSSL_LIB_CTX *libctx, |
e6c54619 | 100 | int loadconfig) |
f9e504e8 | 101 | { |
e6c54619 MC |
102 | #ifndef FIPS_MODULE |
103 | if (loadconfig && !OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL)) | |
104 | return NULL; | |
105 | #endif | |
b4250010 DMSP |
106 | return ossl_lib_ctx_get_data(libctx, OSSL_LIB_CTX_GLOBAL_PROPERTIES, |
107 | &ossl_ctx_global_properties_method); | |
f9e504e8 | 108 | } |
1bdbdaff | 109 | |
bdbf2df2 P |
110 | static int ossl_method_up_ref(METHOD *method) |
111 | { | |
112 | return (*method->up_ref)(method->method); | |
113 | } | |
114 | ||
115 | static void ossl_method_free(METHOD *method) | |
116 | { | |
117 | (*method->free)(method->method); | |
118 | } | |
119 | ||
860ecfd7 | 120 | static __owur int ossl_property_read_lock(OSSL_METHOD_STORE *p) |
1bdbdaff P |
121 | { |
122 | return p != NULL ? CRYPTO_THREAD_read_lock(p->lock) : 0; | |
123 | } | |
124 | ||
860ecfd7 | 125 | static __owur int ossl_property_write_lock(OSSL_METHOD_STORE *p) |
1bdbdaff P |
126 | { |
127 | return p != NULL ? CRYPTO_THREAD_write_lock(p->lock) : 0; | |
128 | } | |
129 | ||
860ecfd7 | 130 | static int ossl_property_unlock(OSSL_METHOD_STORE *p) |
1bdbdaff P |
131 | { |
132 | return p != 0 ? CRYPTO_THREAD_unlock(p->lock) : 0; | |
133 | } | |
134 | ||
1bdbdaff P |
135 | static unsigned long query_hash(const QUERY *a) |
136 | { | |
137 | return OPENSSL_LH_strhash(a->query); | |
138 | } | |
139 | ||
140 | static int query_cmp(const QUERY *a, const QUERY *b) | |
141 | { | |
142 | return strcmp(a->query, b->query); | |
143 | } | |
144 | ||
145 | static void impl_free(IMPLEMENTATION *impl) | |
146 | { | |
147 | if (impl != NULL) { | |
bdbf2df2 | 148 | ossl_method_free(&impl->method); |
1bdbdaff P |
149 | OPENSSL_free(impl); |
150 | } | |
151 | } | |
152 | ||
153 | static void impl_cache_free(QUERY *elem) | |
154 | { | |
bdbf2df2 P |
155 | if (elem != NULL) { |
156 | ossl_method_free(&elem->method); | |
157 | OPENSSL_free(elem); | |
158 | } | |
1bdbdaff P |
159 | } |
160 | ||
8ab53b19 | 161 | static void alg_cleanup(ossl_uintmax_t idx, ALGORITHM *a) |
1bdbdaff P |
162 | { |
163 | if (a != NULL) { | |
164 | sk_IMPLEMENTATION_pop_free(a->impls, &impl_free); | |
165 | lh_QUERY_doall(a->cache, &impl_cache_free); | |
166 | lh_QUERY_free(a->cache); | |
167 | OPENSSL_free(a); | |
168 | } | |
169 | } | |
170 | ||
1aedc35f | 171 | /* |
b4250010 | 172 | * The OSSL_LIB_CTX param here allows access to underlying property data needed |
1aedc35f MC |
173 | * for computation |
174 | */ | |
b4250010 | 175 | OSSL_METHOD_STORE *ossl_method_store_new(OSSL_LIB_CTX *ctx) |
1bdbdaff | 176 | { |
909f2e59 | 177 | OSSL_METHOD_STORE *res; |
1bdbdaff | 178 | |
909f2e59 | 179 | res = OPENSSL_zalloc(sizeof(*res)); |
1bdbdaff | 180 | if (res != NULL) { |
1aedc35f | 181 | res->ctx = ctx; |
1bdbdaff P |
182 | if ((res->algs = ossl_sa_ALGORITHM_new()) == NULL) { |
183 | OPENSSL_free(res); | |
184 | return NULL; | |
185 | } | |
186 | if ((res->lock = CRYPTO_THREAD_lock_new()) == NULL) { | |
bdbf2df2 | 187 | ossl_sa_ALGORITHM_free(res->algs); |
1bdbdaff P |
188 | OPENSSL_free(res); |
189 | return NULL; | |
190 | } | |
191 | } | |
192 | return res; | |
193 | } | |
194 | ||
195 | void ossl_method_store_free(OSSL_METHOD_STORE *store) | |
196 | { | |
197 | if (store != NULL) { | |
198 | ossl_sa_ALGORITHM_doall(store->algs, &alg_cleanup); | |
199 | ossl_sa_ALGORITHM_free(store->algs); | |
1bdbdaff P |
200 | CRYPTO_THREAD_lock_free(store->lock); |
201 | OPENSSL_free(store); | |
202 | } | |
203 | } | |
204 | ||
205 | static ALGORITHM *ossl_method_store_retrieve(OSSL_METHOD_STORE *store, int nid) | |
206 | { | |
207 | return ossl_sa_ALGORITHM_get(store->algs, nid); | |
208 | } | |
209 | ||
210 | static int ossl_method_store_insert(OSSL_METHOD_STORE *store, ALGORITHM *alg) | |
211 | { | |
212 | return ossl_sa_ALGORITHM_set(store->algs, alg->nid, alg); | |
213 | } | |
214 | ||
c1d56231 | 215 | int ossl_method_store_add(OSSL_METHOD_STORE *store, const OSSL_PROVIDER *prov, |
b1d40ddf RL |
216 | int nid, const char *properties, void *method, |
217 | int (*method_up_ref)(void *), | |
218 | void (*method_destruct)(void *)) | |
1bdbdaff P |
219 | { |
220 | ALGORITHM *alg = NULL; | |
221 | IMPLEMENTATION *impl; | |
222 | int ret = 0; | |
c1d56231 | 223 | int i; |
1bdbdaff | 224 | |
0a79572a | 225 | if (nid <= 0 || method == NULL || store == NULL) |
1bdbdaff P |
226 | return 0; |
227 | if (properties == NULL) | |
228 | properties = ""; | |
229 | ||
230 | /* Create new entry */ | |
231 | impl = OPENSSL_malloc(sizeof(*impl)); | |
232 | if (impl == NULL) | |
233 | return 0; | |
bdbf2df2 P |
234 | impl->method.method = method; |
235 | impl->method.up_ref = method_up_ref; | |
236 | impl->method.free = method_destruct; | |
237 | if (!ossl_method_up_ref(&impl->method)) { | |
c1d56231 | 238 | OPENSSL_free(impl); |
b1d40ddf | 239 | return 0; |
c1d56231 RL |
240 | } |
241 | impl->provider = prov; | |
1bdbdaff P |
242 | |
243 | /* | |
244 | * Insert into the hash table if required. | |
245 | * | |
246 | * A write lock is used unconditionally because we wend our way down to the | |
247 | * property string code which isn't locking friendly. | |
248 | */ | |
860ecfd7 P |
249 | if (!ossl_property_write_lock(store)) { |
250 | OPENSSL_free(impl); | |
251 | return 0; | |
252 | } | |
1bdbdaff | 253 | ossl_method_cache_flush(store, nid); |
1aedc35f MC |
254 | if ((impl->properties = ossl_prop_defn_get(store->ctx, properties)) == NULL) { |
255 | impl->properties = ossl_parse_property(store->ctx, properties); | |
256 | if (impl->properties == NULL) | |
1bdbdaff | 257 | goto err; |
1aedc35f | 258 | ossl_prop_defn_set(store->ctx, properties, impl->properties); |
1bdbdaff P |
259 | } |
260 | ||
261 | alg = ossl_method_store_retrieve(store, nid); | |
262 | if (alg == NULL) { | |
263 | if ((alg = OPENSSL_zalloc(sizeof(*alg))) == NULL | |
264 | || (alg->impls = sk_IMPLEMENTATION_new_null()) == NULL | |
265 | || (alg->cache = lh_QUERY_new(&query_hash, &query_cmp)) == NULL) | |
266 | goto err; | |
267 | alg->nid = nid; | |
268 | if (!ossl_method_store_insert(store, alg)) | |
269 | goto err; | |
270 | } | |
271 | ||
c1d56231 RL |
272 | /* Push onto stack if there isn't one there already */ |
273 | for (i = 0; i < sk_IMPLEMENTATION_num(alg->impls); i++) { | |
274 | const IMPLEMENTATION *tmpimpl = sk_IMPLEMENTATION_value(alg->impls, i); | |
275 | ||
276 | if (tmpimpl->provider == impl->provider | |
277 | && tmpimpl->properties == impl->properties) | |
278 | break; | |
279 | } | |
280 | if (i == sk_IMPLEMENTATION_num(alg->impls) | |
281 | && sk_IMPLEMENTATION_push(alg->impls, impl)) | |
1bdbdaff P |
282 | ret = 1; |
283 | ossl_property_unlock(store); | |
284 | if (ret == 0) | |
285 | impl_free(impl); | |
286 | return ret; | |
287 | ||
288 | err: | |
289 | ossl_property_unlock(store); | |
290 | alg_cleanup(0, alg); | |
291 | impl_free(impl); | |
292 | return 0; | |
293 | } | |
294 | ||
295 | int ossl_method_store_remove(OSSL_METHOD_STORE *store, int nid, | |
0a79572a | 296 | const void *method) |
1bdbdaff P |
297 | { |
298 | ALGORITHM *alg = NULL; | |
299 | int i; | |
300 | ||
0a79572a | 301 | if (nid <= 0 || method == NULL || store == NULL) |
1bdbdaff P |
302 | return 0; |
303 | ||
860ecfd7 P |
304 | if (!ossl_property_write_lock(store)) |
305 | return 0; | |
1bdbdaff P |
306 | ossl_method_cache_flush(store, nid); |
307 | alg = ossl_method_store_retrieve(store, nid); | |
308 | if (alg == NULL) { | |
309 | ossl_property_unlock(store); | |
310 | return 0; | |
311 | } | |
312 | ||
313 | /* | |
314 | * A sorting find then a delete could be faster but these stacks should be | |
315 | * relatively small, so we avoid the overhead. Sorting could also surprise | |
316 | * users when result orderings change (even though they are not guaranteed). | |
317 | */ | |
318 | for (i = 0; i < sk_IMPLEMENTATION_num(alg->impls); i++) { | |
319 | IMPLEMENTATION *impl = sk_IMPLEMENTATION_value(alg->impls, i); | |
320 | ||
bdbf2df2 P |
321 | if (impl->method.method == method) { |
322 | impl_free(impl); | |
225c9660 | 323 | (void)sk_IMPLEMENTATION_delete(alg->impls, i); |
1bdbdaff | 324 | ossl_property_unlock(store); |
1bdbdaff P |
325 | return 1; |
326 | } | |
327 | } | |
328 | ossl_property_unlock(store); | |
329 | return 0; | |
330 | } | |
331 | ||
332 | int ossl_method_store_fetch(OSSL_METHOD_STORE *store, int nid, | |
f9e504e8 P |
333 | const char *prop_query, |
334 | void **method) | |
1bdbdaff | 335 | { |
6f924bb8 | 336 | OSSL_PROPERTY_LIST **plp; |
1bdbdaff P |
337 | ALGORITHM *alg; |
338 | IMPLEMENTATION *impl; | |
f9e504e8 | 339 | OSSL_PROPERTY_LIST *pq = NULL, *p2 = NULL; |
bdbf2df2 | 340 | METHOD *best_method = NULL; |
1bdbdaff | 341 | int ret = 0; |
da89ac0b | 342 | int j, best = -1, score, optional; |
1bdbdaff | 343 | |
f844f9eb | 344 | #ifndef FIPS_MODULE |
07af9441 BE |
345 | if (!OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL)) |
346 | return 0; | |
29dc6e00 MC |
347 | #endif |
348 | ||
0a79572a | 349 | if (nid <= 0 || method == NULL || store == NULL) |
1bdbdaff P |
350 | return 0; |
351 | ||
352 | /* | |
353 | * This only needs to be a read lock, because queries never create property | |
354 | * names or value and thus don't modify any of the property string layer. | |
355 | */ | |
860ecfd7 P |
356 | if (!ossl_property_read_lock(store)) |
357 | return 0; | |
1bdbdaff P |
358 | alg = ossl_method_store_retrieve(store, nid); |
359 | if (alg == NULL) { | |
360 | ossl_property_unlock(store); | |
361 | return 0; | |
362 | } | |
363 | ||
6f924bb8 | 364 | if (prop_query != NULL) |
1e08f3ba | 365 | p2 = pq = ossl_parse_query(store->ctx, prop_query, 0); |
07af9441 | 366 | plp = ossl_ctx_global_properties(store->ctx, 0); |
f9e504e8 P |
367 | if (plp != NULL && *plp != NULL) { |
368 | if (pq == NULL) { | |
369 | pq = *plp; | |
370 | } else { | |
371 | p2 = ossl_property_merge(pq, *plp); | |
84ba665d | 372 | ossl_property_free(pq); |
f9e504e8 P |
373 | if (p2 == NULL) |
374 | goto fin; | |
f9e504e8 P |
375 | pq = p2; |
376 | } | |
377 | } | |
378 | ||
379 | if (pq == NULL) { | |
1bdbdaff | 380 | if ((impl = sk_IMPLEMENTATION_value(alg->impls, 0)) != NULL) { |
bdbf2df2 | 381 | best_method = &impl->method; |
1bdbdaff P |
382 | ret = 1; |
383 | } | |
384 | goto fin; | |
385 | } | |
da89ac0b | 386 | optional = ossl_property_has_optional(pq); |
1bdbdaff P |
387 | for (j = 0; j < sk_IMPLEMENTATION_num(alg->impls); j++) { |
388 | impl = sk_IMPLEMENTATION_value(alg->impls, j); | |
da89ac0b P |
389 | score = ossl_property_match_count(pq, impl->properties); |
390 | if (score > best) { | |
bdbf2df2 P |
391 | best_method = &impl->method; |
392 | best = score; | |
1bdbdaff | 393 | ret = 1; |
da89ac0b P |
394 | if (!optional) |
395 | goto fin; | |
1bdbdaff P |
396 | } |
397 | } | |
398 | fin: | |
bdbf2df2 P |
399 | if (ret && ossl_method_up_ref(best_method)) |
400 | *method = best_method->method; | |
401 | else | |
402 | ret = 0; | |
1bdbdaff | 403 | ossl_property_unlock(store); |
f9e504e8 | 404 | ossl_property_free(p2); |
1bdbdaff P |
405 | return ret; |
406 | } | |
407 | ||
04cb5ec0 | 408 | static void impl_cache_flush_alg(ossl_uintmax_t idx, ALGORITHM *alg, void *arg) |
1bdbdaff | 409 | { |
04cb5ec0 SL |
410 | SPARSE_ARRAY_OF(ALGORITHM) *algs = arg; |
411 | ||
1bdbdaff | 412 | lh_QUERY_doall(alg->cache, &impl_cache_free); |
04cb5ec0 SL |
413 | if (algs != NULL) { |
414 | sk_IMPLEMENTATION_pop_free(alg->impls, &impl_free); | |
415 | lh_QUERY_free(alg->cache); | |
416 | OPENSSL_free(alg); | |
417 | ossl_sa_ALGORITHM_set(algs, idx, NULL); | |
418 | } else { | |
419 | lh_QUERY_flush(alg->cache); | |
420 | } | |
1bdbdaff P |
421 | } |
422 | ||
423 | static void ossl_method_cache_flush(OSSL_METHOD_STORE *store, int nid) | |
424 | { | |
425 | ALGORITHM *alg = ossl_method_store_retrieve(store, nid); | |
426 | ||
427 | if (alg != NULL) { | |
428 | store->nelem -= lh_QUERY_num_items(alg->cache); | |
04cb5ec0 | 429 | impl_cache_flush_alg(0, alg, NULL); |
1bdbdaff P |
430 | } |
431 | } | |
432 | ||
860ecfd7 | 433 | int ossl_method_store_flush_cache(OSSL_METHOD_STORE *store, int all) |
1bdbdaff | 434 | { |
04cb5ec0 SL |
435 | void *arg = (all != 0 ? store->algs : NULL); |
436 | ||
860ecfd7 P |
437 | if (!ossl_property_write_lock(store)) |
438 | return 0; | |
04cb5ec0 | 439 | ossl_sa_ALGORITHM_doall_arg(store->algs, &impl_cache_flush_alg, arg); |
1bdbdaff | 440 | store->nelem = 0; |
f9e504e8 | 441 | ossl_property_unlock(store); |
860ecfd7 | 442 | return 1; |
1bdbdaff P |
443 | } |
444 | ||
445 | IMPLEMENT_LHASH_DOALL_ARG(QUERY, IMPL_CACHE_FLUSH); | |
446 | ||
447 | /* | |
448 | * Flush an element from the query cache (perhaps). | |
449 | * | |
f06cf3c4 P |
450 | * In order to avoid taking a write lock or using atomic operations |
451 | * to keep accurate least recently used (LRU) or least frequently used | |
452 | * (LFU) information, the procedure used here is to stochastically | |
453 | * flush approximately half the cache. | |
1bdbdaff | 454 | * |
f06cf3c4 P |
455 | * This procedure isn't ideal, LRU or LFU would be better. However, |
456 | * in normal operation, reaching a full cache would be unexpected. | |
457 | * It means that no steady state of algorithm queries has been reached. | |
458 | * That is, it is most likely an attack of some form. A suboptimal clearance | |
459 | * strategy that doesn't degrade performance of the normal case is | |
460 | * preferable to a more refined approach that imposes a performance | |
461 | * impact. | |
1bdbdaff P |
462 | */ |
463 | static void impl_cache_flush_cache(QUERY *c, IMPL_CACHE_FLUSH *state) | |
464 | { | |
f06cf3c4 P |
465 | uint32_t n; |
466 | ||
467 | /* | |
468 | * Implement the 32 bit xorshift as suggested by George Marsaglia in: | |
469 | * https://doi.org/10.18637/jss.v008.i14 | |
470 | * | |
471 | * This is a very fast PRNG so there is no need to extract bits one at a | |
472 | * time and use the entire value each time. | |
473 | */ | |
474 | n = state->seed; | |
475 | n ^= n << 13; | |
476 | n ^= n >> 17; | |
477 | n ^= n << 5; | |
478 | state->seed = n; | |
479 | ||
480 | if ((n & 1) != 0) | |
bdbf2df2 | 481 | impl_cache_free(lh_QUERY_delete(state->cache, c)); |
1bdbdaff P |
482 | else |
483 | state->nelem++; | |
484 | } | |
485 | ||
8ab53b19 P |
486 | static void impl_cache_flush_one_alg(ossl_uintmax_t idx, ALGORITHM *alg, |
487 | void *v) | |
1bdbdaff P |
488 | { |
489 | IMPL_CACHE_FLUSH *state = (IMPL_CACHE_FLUSH *)v; | |
490 | ||
491 | state->cache = alg->cache; | |
492 | lh_QUERY_doall_IMPL_CACHE_FLUSH(state->cache, &impl_cache_flush_cache, | |
493 | state); | |
494 | } | |
495 | ||
496 | static void ossl_method_cache_flush_some(OSSL_METHOD_STORE *store) | |
497 | { | |
498 | IMPL_CACHE_FLUSH state; | |
499 | ||
500 | state.nelem = 0; | |
f06cf3c4 P |
501 | if ((state.seed = OPENSSL_rdtsc()) == 0) |
502 | state.seed = 1; | |
1bdbdaff | 503 | store->need_flush = 0; |
e2e5abe4 | 504 | ossl_sa_ALGORITHM_doall_arg(store->algs, &impl_cache_flush_one_alg, &state); |
1bdbdaff P |
505 | store->nelem = state.nelem; |
506 | } | |
507 | ||
508 | int ossl_method_store_cache_get(OSSL_METHOD_STORE *store, int nid, | |
0a79572a | 509 | const char *prop_query, void **method) |
1bdbdaff P |
510 | { |
511 | ALGORITHM *alg; | |
512 | QUERY elem, *r; | |
bdbf2df2 | 513 | int res = 0; |
1bdbdaff P |
514 | |
515 | if (nid <= 0 || store == NULL) | |
516 | return 0; | |
517 | ||
860ecfd7 P |
518 | if (!ossl_property_read_lock(store)) |
519 | return 0; | |
1bdbdaff | 520 | alg = ossl_method_store_retrieve(store, nid); |
bdbf2df2 P |
521 | if (alg == NULL) |
522 | goto err; | |
1bdbdaff | 523 | |
1393722a | 524 | elem.query = prop_query != NULL ? prop_query : ""; |
1bdbdaff | 525 | r = lh_QUERY_retrieve(alg->cache, &elem); |
bdbf2df2 P |
526 | if (r == NULL) |
527 | goto err; | |
528 | if (ossl_method_up_ref(&r->method)) { | |
529 | *method = r->method.method; | |
530 | res = 1; | |
1bdbdaff | 531 | } |
bdbf2df2 | 532 | err: |
1bdbdaff | 533 | ossl_property_unlock(store); |
bdbf2df2 | 534 | return res; |
1bdbdaff P |
535 | } |
536 | ||
537 | int ossl_method_store_cache_set(OSSL_METHOD_STORE *store, int nid, | |
bdbf2df2 P |
538 | const char *prop_query, void *method, |
539 | int (*method_up_ref)(void *), | |
540 | void (*method_destruct)(void *)) | |
1bdbdaff P |
541 | { |
542 | QUERY elem, *old, *p = NULL; | |
543 | ALGORITHM *alg; | |
544 | size_t len; | |
bdbf2df2 | 545 | int res = 1; |
1bdbdaff P |
546 | |
547 | if (nid <= 0 || store == NULL) | |
548 | return 0; | |
549 | if (prop_query == NULL) | |
550 | return 1; | |
551 | ||
860ecfd7 P |
552 | if (!ossl_property_write_lock(store)) |
553 | return 0; | |
1bdbdaff P |
554 | if (store->need_flush) |
555 | ossl_method_cache_flush_some(store); | |
556 | alg = ossl_method_store_retrieve(store, nid); | |
bdbf2df2 P |
557 | if (alg == NULL) |
558 | goto err; | |
1bdbdaff | 559 | |
0a79572a | 560 | if (method == NULL) { |
1bdbdaff | 561 | elem.query = prop_query; |
bdbf2df2 P |
562 | if ((old = lh_QUERY_delete(alg->cache, &elem)) != NULL) { |
563 | impl_cache_free(old); | |
f06cf3c4 | 564 | store->nelem--; |
bdbf2df2 P |
565 | } |
566 | goto end; | |
1bdbdaff P |
567 | } |
568 | p = OPENSSL_malloc(sizeof(*p) + (len = strlen(prop_query))); | |
569 | if (p != NULL) { | |
570 | p->query = p->body; | |
bdbf2df2 P |
571 | p->method.method = method; |
572 | p->method.up_ref = method_up_ref; | |
573 | p->method.free = method_destruct; | |
574 | if (!ossl_method_up_ref(&p->method)) | |
575 | goto err; | |
1bdbdaff | 576 | memcpy((char *)p->query, prop_query, len + 1); |
f06cf3c4 | 577 | if ((old = lh_QUERY_insert(alg->cache, p)) != NULL) { |
bdbf2df2 P |
578 | impl_cache_free(old); |
579 | goto end; | |
f06cf3c4 P |
580 | } |
581 | if (!lh_QUERY_error(alg->cache)) { | |
582 | if (++store->nelem >= IMPL_CACHE_FLUSH_THRESHOLD) | |
1bdbdaff | 583 | store->need_flush = 1; |
bdbf2df2 | 584 | goto end; |
1bdbdaff | 585 | } |
bdbf2df2 | 586 | ossl_method_free(&p->method); |
1bdbdaff | 587 | } |
bdbf2df2 P |
588 | err: |
589 | res = 0; | |
defd3ed8 | 590 | OPENSSL_free(p); |
bdbf2df2 P |
591 | end: |
592 | ossl_property_unlock(store); | |
593 | return res; | |
1bdbdaff | 594 | } |