2 * Copyright 2019-2021 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 "crypto/cryptlib.h"
11 #include <openssl/conf.h>
12 #include "internal/thread_once.h"
13 #include "internal/property.h"
14 #include "internal/core.h"
15 #include "internal/bio.h"
16 #include "internal/provider.h"
18 struct ossl_lib_ctx_onfree_list_st {
19 ossl_lib_ctx_onfree_fn *fn;
20 struct ossl_lib_ctx_onfree_list_st *next;
23 struct ossl_lib_ctx_st {
28 * For most data in the OSSL_LIB_CTX we just use ex_data to store it. But
29 * that doesn't work for ex_data itself - so we store that directly.
31 OSSL_EX_DATA_GLOBAL global;
33 /* Map internal static indexes to dynamically created indexes */
34 int dyn_indexes[OSSL_LIB_CTX_MAX_INDEXES];
36 /* Keep a separate lock for each index */
37 CRYPTO_RWLOCK *index_locks[OSSL_LIB_CTX_MAX_INDEXES];
39 CRYPTO_RWLOCK *oncelock;
40 int run_once_done[OSSL_LIB_CTX_MAX_RUN_ONCE];
41 int run_once_ret[OSSL_LIB_CTX_MAX_RUN_ONCE];
42 struct ossl_lib_ctx_onfree_list_st *onfreelist;
43 unsigned int ischild:1;
46 int ossl_lib_ctx_write_lock(OSSL_LIB_CTX *ctx)
48 return CRYPTO_THREAD_write_lock(ossl_lib_ctx_get_concrete(ctx)->lock);
51 int ossl_lib_ctx_read_lock(OSSL_LIB_CTX *ctx)
53 return CRYPTO_THREAD_read_lock(ossl_lib_ctx_get_concrete(ctx)->lock);
56 int ossl_lib_ctx_unlock(OSSL_LIB_CTX *ctx)
58 return CRYPTO_THREAD_unlock(ossl_lib_ctx_get_concrete(ctx)->lock);
61 int ossl_lib_ctx_is_child(OSSL_LIB_CTX *ctx)
63 ctx = ossl_lib_ctx_get_concrete(ctx);
70 static int context_init(OSSL_LIB_CTX *ctx)
75 ctx->lock = CRYPTO_THREAD_lock_new();
76 if (ctx->lock == NULL)
79 ctx->oncelock = CRYPTO_THREAD_lock_new();
80 if (ctx->oncelock == NULL)
83 for (i = 0; i < OSSL_LIB_CTX_MAX_INDEXES; i++) {
84 ctx->index_locks[i] = CRYPTO_THREAD_lock_new();
85 ctx->dyn_indexes[i] = -1;
86 if (ctx->index_locks[i] == NULL)
90 /* OSSL_LIB_CTX is built on top of ex_data so we initialise that directly */
91 if (!ossl_do_ex_data_init(ctx))
95 if (!ossl_crypto_new_ex_data_ex(ctx, CRYPTO_EX_INDEX_OSSL_LIB_CTX, NULL,
97 ossl_crypto_cleanup_all_ex_data_int(ctx);
101 /* Everything depends on properties, so we also pre-initialise that */
102 if (!ossl_property_parse_init(ctx))
108 ossl_crypto_cleanup_all_ex_data_int(ctx);
109 CRYPTO_THREAD_lock_free(ctx->oncelock);
110 CRYPTO_THREAD_lock_free(ctx->lock);
115 static int context_deinit(OSSL_LIB_CTX *ctx)
117 struct ossl_lib_ctx_onfree_list_st *tmp, *onfree;
123 ossl_ctx_thread_stop(ctx);
125 onfree = ctx->onfreelist;
126 while (onfree != NULL) {
129 onfree = onfree->next;
132 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_OSSL_LIB_CTX, NULL, &ctx->data);
133 ossl_crypto_cleanup_all_ex_data_int(ctx);
134 for (i = 0; i < OSSL_LIB_CTX_MAX_INDEXES; i++)
135 CRYPTO_THREAD_lock_free(ctx->index_locks[i]);
137 CRYPTO_THREAD_lock_free(ctx->oncelock);
138 CRYPTO_THREAD_lock_free(ctx->lock);
144 /* The default default context */
145 static OSSL_LIB_CTX default_context_int;
147 static CRYPTO_ONCE default_context_init = CRYPTO_ONCE_STATIC_INIT;
148 static CRYPTO_THREAD_LOCAL default_context_thread_local;
150 DEFINE_RUN_ONCE_STATIC(default_context_do_init)
152 return CRYPTO_THREAD_init_local(&default_context_thread_local, NULL)
153 && context_init(&default_context_int);
156 void ossl_lib_ctx_default_deinit(void)
158 context_deinit(&default_context_int);
161 static OSSL_LIB_CTX *get_thread_default_context(void)
163 if (!RUN_ONCE(&default_context_init, default_context_do_init))
166 return CRYPTO_THREAD_get_local(&default_context_thread_local);
169 static OSSL_LIB_CTX *get_default_context(void)
171 OSSL_LIB_CTX *current_defctx = get_thread_default_context();
173 if (current_defctx == NULL)
174 current_defctx = &default_context_int;
175 return current_defctx;
178 static int set_default_context(OSSL_LIB_CTX *defctx)
180 if (defctx == &default_context_int)
183 return CRYPTO_THREAD_set_local(&default_context_thread_local, defctx);
187 OSSL_LIB_CTX *OSSL_LIB_CTX_new(void)
189 OSSL_LIB_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx));
191 if (ctx != NULL && !context_init(ctx)) {
192 OSSL_LIB_CTX_free(ctx);
199 OSSL_LIB_CTX *OSSL_LIB_CTX_new_from_dispatch(const OSSL_CORE_HANDLE *handle,
200 const OSSL_DISPATCH *in)
202 OSSL_LIB_CTX *ctx = OSSL_LIB_CTX_new();
207 if (!ossl_bio_init_core(ctx, in)) {
208 OSSL_LIB_CTX_free(ctx);
215 OSSL_LIB_CTX *OSSL_LIB_CTX_new_child(const OSSL_CORE_HANDLE *handle,
216 const OSSL_DISPATCH *in)
218 OSSL_LIB_CTX *ctx = OSSL_LIB_CTX_new_from_dispatch(handle, in);
223 if (!ossl_provider_init_as_child(ctx, handle, in)) {
224 OSSL_LIB_CTX_free(ctx);
232 int OSSL_LIB_CTX_load_config(OSSL_LIB_CTX *ctx, const char *config_file)
234 return CONF_modules_load_file_ex(ctx, config_file, NULL, 0) > 0;
238 void OSSL_LIB_CTX_free(OSSL_LIB_CTX *ctx)
240 if (ossl_lib_ctx_is_default(ctx))
248 OSSL_LIB_CTX *OSSL_LIB_CTX_get0_global_default(void)
250 if (!RUN_ONCE(&default_context_init, default_context_do_init))
253 return &default_context_int;
256 OSSL_LIB_CTX *OSSL_LIB_CTX_set0_default(OSSL_LIB_CTX *libctx)
258 OSSL_LIB_CTX *current_defctx;
260 if ((current_defctx = get_default_context()) != NULL) {
262 set_default_context(libctx);
263 return current_defctx;
270 OSSL_LIB_CTX *ossl_lib_ctx_get_concrete(OSSL_LIB_CTX *ctx)
274 return get_default_context();
279 int ossl_lib_ctx_is_default(OSSL_LIB_CTX *ctx)
282 if (ctx == NULL || ctx == get_default_context())
288 int ossl_lib_ctx_is_global_default(OSSL_LIB_CTX *ctx)
291 if (ossl_lib_ctx_get_concrete(ctx) == &default_context_int)
297 static void ossl_lib_ctx_generic_new(void *parent_ign, void *ptr_ign,
298 CRYPTO_EX_DATA *ad, int index,
299 long argl_ign, void *argp)
301 const OSSL_LIB_CTX_METHOD *meth = argp;
302 OSSL_LIB_CTX *ctx = ossl_crypto_ex_data_get_ossl_lib_ctx(ad);
303 void *ptr = meth->new_func(ctx);
306 if (!CRYPTO_THREAD_write_lock(ctx->lock))
308 * Can't return something, so best to hope that something will
312 CRYPTO_set_ex_data(ad, index, ptr);
313 CRYPTO_THREAD_unlock(ctx->lock);
316 static void ossl_lib_ctx_generic_free(void *parent_ign, void *ptr,
317 CRYPTO_EX_DATA *ad, int index,
318 long argl_ign, void *argp)
320 const OSSL_LIB_CTX_METHOD *meth = argp;
322 meth->free_func(ptr);
325 static int ossl_lib_ctx_init_index(OSSL_LIB_CTX *ctx, int static_index,
326 const OSSL_LIB_CTX_METHOD *meth)
330 ctx = ossl_lib_ctx_get_concrete(ctx);
334 idx = ossl_crypto_get_ex_new_index_ex(ctx, CRYPTO_EX_INDEX_OSSL_LIB_CTX, 0,
336 ossl_lib_ctx_generic_new,
337 NULL, ossl_lib_ctx_generic_free,
342 ctx->dyn_indexes[static_index] = idx;
346 void *ossl_lib_ctx_get_data(OSSL_LIB_CTX *ctx, int index,
347 const OSSL_LIB_CTX_METHOD *meth)
352 ctx = ossl_lib_ctx_get_concrete(ctx);
356 if (!CRYPTO_THREAD_read_lock(ctx->lock))
358 dynidx = ctx->dyn_indexes[index];
359 CRYPTO_THREAD_unlock(ctx->lock);
362 if (!CRYPTO_THREAD_read_lock(ctx->index_locks[index]))
364 if (!CRYPTO_THREAD_read_lock(ctx->lock)) {
365 CRYPTO_THREAD_unlock(ctx->index_locks[index]);
368 data = CRYPTO_get_ex_data(&ctx->data, dynidx);
369 CRYPTO_THREAD_unlock(ctx->lock);
370 CRYPTO_THREAD_unlock(ctx->index_locks[index]);
374 if (!CRYPTO_THREAD_write_lock(ctx->index_locks[index]))
376 if (!CRYPTO_THREAD_write_lock(ctx->lock)) {
377 CRYPTO_THREAD_unlock(ctx->index_locks[index]);
381 dynidx = ctx->dyn_indexes[index];
383 data = CRYPTO_get_ex_data(&ctx->data, dynidx);
384 CRYPTO_THREAD_unlock(ctx->lock);
385 CRYPTO_THREAD_unlock(ctx->index_locks[index]);
389 if (!ossl_lib_ctx_init_index(ctx, index, meth)) {
390 CRYPTO_THREAD_unlock(ctx->lock);
391 CRYPTO_THREAD_unlock(ctx->index_locks[index]);
395 CRYPTO_THREAD_unlock(ctx->lock);
398 * The alloc call ensures there's a value there. We release the ctx->lock
399 * for this, because the allocation itself may recursively call
400 * ossl_lib_ctx_get_data for other indexes (never this one). The allocation
401 * will itself aquire the ctx->lock when it actually comes to store the
402 * allocated data (see ossl_lib_ctx_generic_new() above). We call
403 * ossl_crypto_alloc_ex_data_intern() here instead of CRYPTO_alloc_ex_data().
404 * They do the same thing except that the latter calls CRYPTO_get_ex_data()
405 * as well - which we must not do without holding the ctx->lock.
407 if (ossl_crypto_alloc_ex_data_intern(CRYPTO_EX_INDEX_OSSL_LIB_CTX, NULL,
408 &ctx->data, ctx->dyn_indexes[index])) {
409 if (!CRYPTO_THREAD_read_lock(ctx->lock))
411 data = CRYPTO_get_ex_data(&ctx->data, ctx->dyn_indexes[index]);
412 CRYPTO_THREAD_unlock(ctx->lock);
416 CRYPTO_THREAD_unlock(ctx->index_locks[index]);
420 OSSL_EX_DATA_GLOBAL *ossl_lib_ctx_get_ex_data_global(OSSL_LIB_CTX *ctx)
422 ctx = ossl_lib_ctx_get_concrete(ctx);
428 int ossl_lib_ctx_run_once(OSSL_LIB_CTX *ctx, unsigned int idx,
429 ossl_lib_ctx_run_once_fn run_once_fn)
431 int done = 0, ret = 0;
433 ctx = ossl_lib_ctx_get_concrete(ctx);
437 if (!CRYPTO_THREAD_read_lock(ctx->oncelock))
439 done = ctx->run_once_done[idx];
441 ret = ctx->run_once_ret[idx];
442 CRYPTO_THREAD_unlock(ctx->oncelock);
447 if (!CRYPTO_THREAD_write_lock(ctx->oncelock))
449 if (ctx->run_once_done[idx]) {
450 ret = ctx->run_once_ret[idx];
451 CRYPTO_THREAD_unlock(ctx->oncelock);
455 ret = run_once_fn(ctx);
456 ctx->run_once_done[idx] = 1;
457 ctx->run_once_ret[idx] = ret;
458 CRYPTO_THREAD_unlock(ctx->oncelock);
463 int ossl_lib_ctx_onfree(OSSL_LIB_CTX *ctx, ossl_lib_ctx_onfree_fn onfreefn)
465 struct ossl_lib_ctx_onfree_list_st *newonfree
466 = OPENSSL_malloc(sizeof(*newonfree));
468 if (newonfree == NULL)
471 newonfree->fn = onfreefn;
472 newonfree->next = ctx->onfreelist;
473 ctx->onfreelist = newonfree;
478 const char *ossl_lib_ctx_get_descriptor(OSSL_LIB_CTX *libctx)
481 return "FIPS internal library context";
483 if (ossl_lib_ctx_is_global_default(libctx))
484 return "Global default library context";
485 if (ossl_lib_ctx_is_default(libctx))
486 return "Thread-local default library context";
487 return "Non-default library context";