2 * Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 #include <openssl/store.h>
11 #include <openssl/crypto.h>
12 #include "internal/core.h"
13 #include "internal/namemap.h"
14 #include "internal/property.h"
15 #include "internal/provider.h"
16 #include "store_local.h"
18 int OSSL_STORE_LOADER_up_ref(OSSL_STORE_LOADER *loader)
22 if (loader->prov != NULL)
23 CRYPTO_UP_REF(&loader->refcnt, &ref, loader->lock);
27 void OSSL_STORE_LOADER_free(OSSL_STORE_LOADER *loader)
29 if (loader != NULL && loader->prov != NULL) {
32 CRYPTO_DOWN_REF(&loader->refcnt, &i, loader->lock);
35 ossl_provider_free(loader->prov);
36 CRYPTO_THREAD_lock_free(loader->lock);
42 * OSSL_STORE_LOADER_new() expects the scheme as a constant string,
43 * which we currently don't have, so we need an alternative allocator.
45 static OSSL_STORE_LOADER *new_loader(OSSL_PROVIDER *prov)
47 OSSL_STORE_LOADER *loader;
49 if ((loader = OPENSSL_zalloc(sizeof(*loader))) == NULL
50 || (loader->lock = CRYPTO_THREAD_lock_new()) == NULL) {
55 ossl_provider_up_ref(prov);
61 static int up_ref_loader(void *method)
63 return OSSL_STORE_LOADER_up_ref(method);
66 static void free_loader(void *method)
68 OSSL_STORE_LOADER_free(method);
71 /* Permanent loader method store, constructor and destructor */
72 static void loader_store_free(void *vstore)
74 ossl_method_store_free(vstore);
77 static void *loader_store_new(OSSL_LIB_CTX *ctx)
79 return ossl_method_store_new(ctx);
83 static const OSSL_LIB_CTX_METHOD loader_store_method = {
88 /* Data to be passed through ossl_method_construct() */
89 struct loader_data_st {
91 OSSL_METHOD_CONSTRUCT_METHOD *mcm;
92 int scheme_id; /* For get_loader_from_store() */
93 const char *scheme; /* For get_loader_from_store() */
94 const char *propquery; /* For get_loader_from_store() */
98 * Generic routines to fetch / create OSSL_STORE methods with
99 * ossl_method_construct()
102 /* Temporary loader method store, constructor and destructor */
103 static void *alloc_tmp_loader_store(OSSL_LIB_CTX *ctx)
105 return ossl_method_store_new(ctx);
108 static void dealloc_tmp_loader_store(void *store)
111 ossl_method_store_free(store);
114 /* Get the permanent loader store */
115 static OSSL_METHOD_STORE *get_loader_store(OSSL_LIB_CTX *libctx)
117 return ossl_lib_ctx_get_data(libctx, OSSL_LIB_CTX_STORE_LOADER_STORE_INDEX,
118 &loader_store_method);
121 /* Get loader methods from a store, or put one in */
122 static void *get_loader_from_store(OSSL_LIB_CTX *libctx, void *store,
125 struct loader_data_st *methdata = data;
129 if ((id = methdata->scheme_id) == 0) {
130 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
132 id = ossl_namemap_name2num(namemap, methdata->scheme);
136 && (store = get_loader_store(libctx)) == NULL)
139 if (!ossl_method_store_fetch(store, id, methdata->propquery, &method))
144 static int put_loader_in_store(OSSL_LIB_CTX *libctx, void *store,
145 void *method, const OSSL_PROVIDER *prov,
146 int operation_id, const char *scheme,
147 const char *propdef, void *unused)
149 OSSL_NAMEMAP *namemap;
152 if ((namemap = ossl_namemap_stored(libctx)) == NULL
153 || (id = ossl_namemap_name2num(namemap, scheme)) == 0)
156 if (store == NULL && (store = get_loader_store(libctx)) == NULL)
159 return ossl_method_store_add(store, prov, id, propdef, method,
160 up_ref_loader, free_loader);
163 static void *loader_from_dispatch(int scheme_id, const OSSL_ALGORITHM *algodef,
166 OSSL_STORE_LOADER *loader = NULL;
167 const OSSL_DISPATCH *fns = algodef->implementation;
169 if ((loader = new_loader(prov)) == NULL)
171 loader->scheme_id = scheme_id;
172 loader->propdef = algodef->property_definition;
174 for (; fns->function_id != 0; fns++) {
175 switch (fns->function_id) {
176 case OSSL_FUNC_STORE_OPEN:
177 if (loader->p_open == NULL)
178 loader->p_open = OSSL_FUNC_store_open(fns);
180 case OSSL_FUNC_STORE_ATTACH:
181 if (loader->p_attach == NULL)
182 loader->p_attach = OSSL_FUNC_store_attach(fns);
184 case OSSL_FUNC_STORE_SETTABLE_CTX_PARAMS:
185 if (loader->p_settable_ctx_params == NULL)
186 loader->p_settable_ctx_params =
187 OSSL_FUNC_store_settable_ctx_params(fns);
189 case OSSL_FUNC_STORE_SET_CTX_PARAMS:
190 if (loader->p_set_ctx_params == NULL)
191 loader->p_set_ctx_params = OSSL_FUNC_store_set_ctx_params(fns);
193 case OSSL_FUNC_STORE_LOAD:
194 if (loader->p_load == NULL)
195 loader->p_load = OSSL_FUNC_store_load(fns);
197 case OSSL_FUNC_STORE_EOF:
198 if (loader->p_eof == NULL)
199 loader->p_eof = OSSL_FUNC_store_eof(fns);
201 case OSSL_FUNC_STORE_CLOSE:
202 if (loader->p_close == NULL)
203 loader->p_close = OSSL_FUNC_store_close(fns);
205 case OSSL_FUNC_STORE_EXPORT_OBJECT:
206 if (loader->p_export_object == NULL)
207 loader->p_export_object = OSSL_FUNC_store_export_object(fns);
212 if ((loader->p_open == NULL && loader->p_attach == NULL)
213 || loader->p_load == NULL
214 || loader->p_eof == NULL
215 || loader->p_close == NULL) {
216 /* Only set_ctx_params is optionaal */
217 OSSL_STORE_LOADER_free(loader);
218 ERR_raise(ERR_LIB_OSSL_STORE, OSSL_STORE_R_LOADER_INCOMPLETE);
225 * The core fetching functionality passes the scheme of the implementation.
226 * This function is responsible to getting an identity number for them,
227 * then call loader_from_dispatch() with that identity number.
229 static void *construct_loader(const OSSL_ALGORITHM *algodef,
230 OSSL_PROVIDER *prov, void *unused)
233 * This function is only called if get_loader_from_store() returned
234 * NULL, so it's safe to say that of all the spots to create a new
235 * namemap entry, this is it. Should the scheme already exist there, we
236 * know that ossl_namemap_add() will return its corresponding number.
238 OSSL_LIB_CTX *libctx = ossl_provider_libctx(prov);
239 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
240 const char *scheme = algodef->algorithm_names;
241 int id = ossl_namemap_add_name(namemap, 0, scheme);
245 method = loader_from_dispatch(id, algodef, prov);
250 /* Intermediary function to avoid ugly casts, used below */
251 static void destruct_loader(void *method, void *data)
253 OSSL_STORE_LOADER_free(method);
256 /* Fetching support. Can fetch by numeric identity or by scheme */
257 static OSSL_STORE_LOADER *inner_loader_fetch(OSSL_LIB_CTX *libctx,
258 int id, const char *scheme,
259 const char *properties)
261 OSSL_METHOD_STORE *store = get_loader_store(libctx);
262 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
265 if (store == NULL || namemap == NULL)
269 * If we have been passed neither a scheme_id or a scheme, we have an
270 * internal programming error.
272 if (!ossl_assert(id != 0 || scheme != NULL))
276 id = ossl_namemap_name2num(namemap, scheme);
279 || !ossl_method_store_cache_get(store, id, properties, &method)) {
280 OSSL_METHOD_CONSTRUCT_METHOD mcm = {
281 alloc_tmp_loader_store,
282 dealloc_tmp_loader_store,
283 get_loader_from_store,
288 struct loader_data_st mcmdata;
290 mcmdata.libctx = libctx;
292 mcmdata.scheme_id = id;
293 mcmdata.scheme = scheme;
294 mcmdata.propquery = properties;
295 if ((method = ossl_method_construct(libctx, OSSL_OP_STORE,
296 0 /* !force_cache */,
297 &mcm, &mcmdata)) != NULL) {
299 * If construction did create a method for us, we know that there
300 * is a correct scheme_id, since those have already been calculated
301 * in get_loader_from_store() and put_loader_in_store() above.
304 id = ossl_namemap_name2num(namemap, scheme);
305 ossl_method_store_cache_set(store, id, properties, method,
306 up_ref_loader, free_loader);
313 OSSL_STORE_LOADER *OSSL_STORE_LOADER_fetch(const char *scheme,
314 OSSL_LIB_CTX *libctx,
315 const char *properties)
317 return inner_loader_fetch(libctx, 0, scheme, properties);
320 OSSL_STORE_LOADER *ossl_store_loader_fetch_by_number(OSSL_LIB_CTX *libctx,
322 const char *properties)
324 return inner_loader_fetch(libctx, scheme_id, NULL, properties);
328 * Library of basic method functions
331 const OSSL_PROVIDER *OSSL_STORE_LOADER_provider(const OSSL_STORE_LOADER *loader)
333 if (!ossl_assert(loader != NULL)) {
334 ERR_raise(ERR_LIB_OSSL_STORE, ERR_R_PASSED_NULL_PARAMETER);
341 const char *OSSL_STORE_LOADER_properties(const OSSL_STORE_LOADER *loader)
343 if (!ossl_assert(loader != NULL)) {
344 ERR_raise(ERR_LIB_OSSL_STORE, ERR_R_PASSED_NULL_PARAMETER);
348 return loader->propdef;
351 int OSSL_STORE_LOADER_number(const OSSL_STORE_LOADER *loader)
353 if (!ossl_assert(loader != NULL)) {
354 ERR_raise(ERR_LIB_OSSL_STORE, ERR_R_PASSED_NULL_PARAMETER);
358 return loader->scheme_id;
361 int OSSL_STORE_LOADER_is_a(const OSSL_STORE_LOADER *loader, const char *name)
363 if (loader->prov != NULL) {
364 OSSL_LIB_CTX *libctx = ossl_provider_libctx(loader->prov);
365 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
367 return ossl_namemap_name2num(namemap, name) == loader->scheme_id;
372 struct loader_do_all_data_st {
373 void (*user_fn)(void *method, void *arg);
377 static void loader_do_one(OSSL_PROVIDER *provider,
378 const OSSL_ALGORITHM *algodef,
379 int no_store, void *vdata)
381 struct loader_do_all_data_st *data = vdata;
382 OSSL_LIB_CTX *libctx = ossl_provider_libctx(provider);
383 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
384 const char *name = algodef->algorithm_names;
385 int id = ossl_namemap_add_name(namemap, 0, name);
390 loader_from_dispatch(id, algodef, provider);
392 if (method != NULL) {
393 data->user_fn(method, data->user_arg);
394 OSSL_STORE_LOADER_free(method);
398 void OSSL_STORE_LOADER_do_all_provided(OSSL_LIB_CTX *libctx,
399 void (*fn)(OSSL_STORE_LOADER *loader,
403 struct loader_do_all_data_st data;
405 data.user_fn = (void (*)(void *, void *))fn;
407 ossl_algorithm_do_all(libctx, OSSL_OP_STORE, NULL,
408 NULL, loader_do_one, NULL,
412 void OSSL_STORE_LOADER_names_do_all(const OSSL_STORE_LOADER *loader,
413 void (*fn)(const char *name, void *data),
419 if (loader->prov != NULL) {
420 OSSL_LIB_CTX *libctx = ossl_provider_libctx(loader->prov);
421 OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
423 ossl_namemap_doall_names(namemap, loader->scheme_id, fn, data);