2 * Copyright 2019-2022 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"
17 #include "crypto/ctype.h"
19 struct ossl_lib_ctx_onfree_list_st {
20 ossl_lib_ctx_onfree_fn *fn;
21 struct ossl_lib_ctx_onfree_list_st *next;
24 struct ossl_lib_ctx_st {
29 * For most data in the OSSL_LIB_CTX we just use ex_data to store it. But
30 * that doesn't work for ex_data itself - so we store that directly.
32 OSSL_EX_DATA_GLOBAL global;
34 /* Map internal static indexes to dynamically created indexes */
35 int dyn_indexes[OSSL_LIB_CTX_MAX_INDEXES];
37 /* Keep a separate lock for each index */
38 CRYPTO_RWLOCK *index_locks[OSSL_LIB_CTX_MAX_INDEXES];
40 CRYPTO_RWLOCK *oncelock;
41 int run_once_done[OSSL_LIB_CTX_MAX_RUN_ONCE];
42 int run_once_ret[OSSL_LIB_CTX_MAX_RUN_ONCE];
43 struct ossl_lib_ctx_onfree_list_st *onfreelist;
44 unsigned int ischild:1;
47 int ossl_lib_ctx_write_lock(OSSL_LIB_CTX *ctx)
49 return CRYPTO_THREAD_write_lock(ossl_lib_ctx_get_concrete(ctx)->lock);
52 int ossl_lib_ctx_read_lock(OSSL_LIB_CTX *ctx)
54 return CRYPTO_THREAD_read_lock(ossl_lib_ctx_get_concrete(ctx)->lock);
57 int ossl_lib_ctx_unlock(OSSL_LIB_CTX *ctx)
59 return CRYPTO_THREAD_unlock(ossl_lib_ctx_get_concrete(ctx)->lock);
62 int ossl_lib_ctx_is_child(OSSL_LIB_CTX *ctx)
64 ctx = ossl_lib_ctx_get_concrete(ctx);
71 static int context_init(OSSL_LIB_CTX *ctx)
76 ctx->lock = CRYPTO_THREAD_lock_new();
77 if (ctx->lock == NULL)
80 ctx->oncelock = CRYPTO_THREAD_lock_new();
81 if (ctx->oncelock == NULL)
84 for (i = 0; i < OSSL_LIB_CTX_MAX_INDEXES; i++) {
85 ctx->index_locks[i] = CRYPTO_THREAD_lock_new();
86 ctx->dyn_indexes[i] = -1;
87 if (ctx->index_locks[i] == NULL)
91 /* OSSL_LIB_CTX is built on top of ex_data so we initialise that directly */
92 if (!ossl_do_ex_data_init(ctx))
96 if (!ossl_crypto_new_ex_data_ex(ctx, CRYPTO_EX_INDEX_OSSL_LIB_CTX, NULL,
100 /* Everything depends on properties, so we also pre-initialise that */
101 if (!ossl_property_parse_init(ctx))
107 ossl_crypto_cleanup_all_ex_data_int(ctx);
108 for (i = 0; i < OSSL_LIB_CTX_MAX_INDEXES; i++)
109 CRYPTO_THREAD_lock_free(ctx->index_locks[i]);
110 CRYPTO_THREAD_lock_free(ctx->oncelock);
111 CRYPTO_THREAD_lock_free(ctx->lock);
112 memset(ctx, '\0', sizeof(*ctx));
116 static int context_deinit(OSSL_LIB_CTX *ctx)
118 struct ossl_lib_ctx_onfree_list_st *tmp, *onfree;
124 ossl_ctx_thread_stop(ctx);
126 onfree = ctx->onfreelist;
127 while (onfree != NULL) {
130 onfree = onfree->next;
133 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_OSSL_LIB_CTX, NULL, &ctx->data);
134 ossl_crypto_cleanup_all_ex_data_int(ctx);
135 for (i = 0; i < OSSL_LIB_CTX_MAX_INDEXES; i++)
136 CRYPTO_THREAD_lock_free(ctx->index_locks[i]);
138 CRYPTO_THREAD_lock_free(ctx->oncelock);
139 CRYPTO_THREAD_lock_free(ctx->lock);
145 /* The default default context */
146 static OSSL_LIB_CTX default_context_int;
148 static CRYPTO_ONCE default_context_init = CRYPTO_ONCE_STATIC_INIT;
149 static CRYPTO_THREAD_LOCAL default_context_thread_local;
151 DEFINE_RUN_ONCE_STATIC(default_context_do_init)
153 return CRYPTO_THREAD_init_local(&default_context_thread_local, NULL)
154 && context_init(&default_context_int);
157 void ossl_lib_ctx_default_deinit(void)
159 context_deinit(&default_context_int);
160 CRYPTO_THREAD_cleanup_local(&default_context_thread_local);
163 static OSSL_LIB_CTX *get_thread_default_context(void)
165 if (!RUN_ONCE(&default_context_init, default_context_do_init))
168 return CRYPTO_THREAD_get_local(&default_context_thread_local);
171 static OSSL_LIB_CTX *get_default_context(void)
173 OSSL_LIB_CTX *current_defctx = get_thread_default_context();
175 if (current_defctx == NULL)
176 current_defctx = &default_context_int;
177 return current_defctx;
180 static int set_default_context(OSSL_LIB_CTX *defctx)
182 if (defctx == &default_context_int)
185 return CRYPTO_THREAD_set_local(&default_context_thread_local, defctx);
189 OSSL_LIB_CTX *OSSL_LIB_CTX_new(void)
191 OSSL_LIB_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx));
193 if (ctx != NULL && !context_init(ctx)) {
201 OSSL_LIB_CTX *OSSL_LIB_CTX_new_from_dispatch(const OSSL_CORE_HANDLE *handle,
202 const OSSL_DISPATCH *in)
204 OSSL_LIB_CTX *ctx = OSSL_LIB_CTX_new();
209 if (!ossl_bio_init_core(ctx, in)) {
210 OSSL_LIB_CTX_free(ctx);
217 OSSL_LIB_CTX *OSSL_LIB_CTX_new_child(const OSSL_CORE_HANDLE *handle,
218 const OSSL_DISPATCH *in)
220 OSSL_LIB_CTX *ctx = OSSL_LIB_CTX_new_from_dispatch(handle, in);
225 if (!ossl_provider_init_as_child(ctx, handle, in)) {
226 OSSL_LIB_CTX_free(ctx);
234 int OSSL_LIB_CTX_load_config(OSSL_LIB_CTX *ctx, const char *config_file)
236 return CONF_modules_load_file_ex(ctx, config_file, NULL, 0) > 0;
240 void OSSL_LIB_CTX_free(OSSL_LIB_CTX *ctx)
242 if (ossl_lib_ctx_is_default(ctx))
247 ossl_provider_deinit_child(ctx);
254 OSSL_LIB_CTX *OSSL_LIB_CTX_get0_global_default(void)
256 if (!RUN_ONCE(&default_context_init, default_context_do_init))
259 return &default_context_int;
262 OSSL_LIB_CTX *OSSL_LIB_CTX_set0_default(OSSL_LIB_CTX *libctx)
264 OSSL_LIB_CTX *current_defctx;
266 if ((current_defctx = get_default_context()) != NULL) {
268 set_default_context(libctx);
269 return current_defctx;
276 OSSL_LIB_CTX *ossl_lib_ctx_get_concrete(OSSL_LIB_CTX *ctx)
280 return get_default_context();
285 int ossl_lib_ctx_is_default(OSSL_LIB_CTX *ctx)
288 if (ctx == NULL || ctx == get_default_context())
294 int ossl_lib_ctx_is_global_default(OSSL_LIB_CTX *ctx)
297 if (ossl_lib_ctx_get_concrete(ctx) == &default_context_int)
303 static void ossl_lib_ctx_generic_new(void *parent_ign, void *ptr_ign,
304 CRYPTO_EX_DATA *ad, int index,
305 long argl_ign, void *argp)
307 const OSSL_LIB_CTX_METHOD *meth = argp;
308 OSSL_LIB_CTX *ctx = ossl_crypto_ex_data_get_ossl_lib_ctx(ad);
309 void *ptr = meth->new_func(ctx);
312 if (!CRYPTO_THREAD_write_lock(ctx->lock))
314 * Can't return something, so best to hope that something will
318 CRYPTO_set_ex_data(ad, index, ptr);
319 CRYPTO_THREAD_unlock(ctx->lock);
322 static void ossl_lib_ctx_generic_free(void *parent_ign, void *ptr,
323 CRYPTO_EX_DATA *ad, int index,
324 long argl_ign, void *argp)
326 const OSSL_LIB_CTX_METHOD *meth = argp;
328 meth->free_func(ptr);
331 static int ossl_lib_ctx_init_index(OSSL_LIB_CTX *ctx, int static_index,
332 const OSSL_LIB_CTX_METHOD *meth)
336 ctx = ossl_lib_ctx_get_concrete(ctx);
340 idx = ossl_crypto_get_ex_new_index_ex(ctx, CRYPTO_EX_INDEX_OSSL_LIB_CTX, 0,
342 ossl_lib_ctx_generic_new,
343 NULL, ossl_lib_ctx_generic_free,
348 ctx->dyn_indexes[static_index] = idx;
352 void *ossl_lib_ctx_get_data(OSSL_LIB_CTX *ctx, int index,
353 const OSSL_LIB_CTX_METHOD *meth)
358 ctx = ossl_lib_ctx_get_concrete(ctx);
362 if (!CRYPTO_THREAD_read_lock(ctx->lock))
364 dynidx = ctx->dyn_indexes[index];
365 CRYPTO_THREAD_unlock(ctx->lock);
368 if (!CRYPTO_THREAD_read_lock(ctx->index_locks[index]))
370 if (!CRYPTO_THREAD_read_lock(ctx->lock)) {
371 CRYPTO_THREAD_unlock(ctx->index_locks[index]);
374 data = CRYPTO_get_ex_data(&ctx->data, dynidx);
375 CRYPTO_THREAD_unlock(ctx->lock);
376 CRYPTO_THREAD_unlock(ctx->index_locks[index]);
380 if (!CRYPTO_THREAD_write_lock(ctx->index_locks[index]))
382 if (!CRYPTO_THREAD_write_lock(ctx->lock)) {
383 CRYPTO_THREAD_unlock(ctx->index_locks[index]);
387 dynidx = ctx->dyn_indexes[index];
389 data = CRYPTO_get_ex_data(&ctx->data, dynidx);
390 CRYPTO_THREAD_unlock(ctx->lock);
391 CRYPTO_THREAD_unlock(ctx->index_locks[index]);
395 if (!ossl_lib_ctx_init_index(ctx, index, meth)) {
396 CRYPTO_THREAD_unlock(ctx->lock);
397 CRYPTO_THREAD_unlock(ctx->index_locks[index]);
401 CRYPTO_THREAD_unlock(ctx->lock);
404 * The alloc call ensures there's a value there. We release the ctx->lock
405 * for this, because the allocation itself may recursively call
406 * ossl_lib_ctx_get_data for other indexes (never this one). The allocation
407 * will itself aquire the ctx->lock when it actually comes to store the
408 * allocated data (see ossl_lib_ctx_generic_new() above). We call
409 * ossl_crypto_alloc_ex_data_intern() here instead of CRYPTO_alloc_ex_data().
410 * They do the same thing except that the latter calls CRYPTO_get_ex_data()
411 * as well - which we must not do without holding the ctx->lock.
413 if (ossl_crypto_alloc_ex_data_intern(CRYPTO_EX_INDEX_OSSL_LIB_CTX, NULL,
414 &ctx->data, ctx->dyn_indexes[index])) {
415 if (!CRYPTO_THREAD_read_lock(ctx->lock))
417 data = CRYPTO_get_ex_data(&ctx->data, ctx->dyn_indexes[index]);
418 CRYPTO_THREAD_unlock(ctx->lock);
422 CRYPTO_THREAD_unlock(ctx->index_locks[index]);
426 OSSL_EX_DATA_GLOBAL *ossl_lib_ctx_get_ex_data_global(OSSL_LIB_CTX *ctx)
428 ctx = ossl_lib_ctx_get_concrete(ctx);
434 int ossl_lib_ctx_run_once(OSSL_LIB_CTX *ctx, unsigned int idx,
435 ossl_lib_ctx_run_once_fn run_once_fn)
437 int done = 0, ret = 0;
439 ctx = ossl_lib_ctx_get_concrete(ctx);
443 if (!CRYPTO_THREAD_read_lock(ctx->oncelock))
445 done = ctx->run_once_done[idx];
447 ret = ctx->run_once_ret[idx];
448 CRYPTO_THREAD_unlock(ctx->oncelock);
453 if (!CRYPTO_THREAD_write_lock(ctx->oncelock))
455 if (ctx->run_once_done[idx]) {
456 ret = ctx->run_once_ret[idx];
457 CRYPTO_THREAD_unlock(ctx->oncelock);
461 ret = run_once_fn(ctx);
462 ctx->run_once_done[idx] = 1;
463 ctx->run_once_ret[idx] = ret;
464 CRYPTO_THREAD_unlock(ctx->oncelock);
469 int ossl_lib_ctx_onfree(OSSL_LIB_CTX *ctx, ossl_lib_ctx_onfree_fn onfreefn)
471 struct ossl_lib_ctx_onfree_list_st *newonfree
472 = OPENSSL_malloc(sizeof(*newonfree));
474 if (newonfree == NULL)
477 newonfree->fn = onfreefn;
478 newonfree->next = ctx->onfreelist;
479 ctx->onfreelist = newonfree;
484 const char *ossl_lib_ctx_get_descriptor(OSSL_LIB_CTX *libctx)
487 return "FIPS internal library context";
489 if (ossl_lib_ctx_is_global_default(libctx))
490 return "Global default library context";
491 if (ossl_lib_ctx_is_default(libctx))
492 return "Thread-local default library context";
493 return "Non-default library context";