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)
155 && ossl_init_casecmp();
158 void ossl_lib_ctx_default_deinit(void)
160 context_deinit(&default_context_int);
161 CRYPTO_THREAD_cleanup_local(&default_context_thread_local);
164 static OSSL_LIB_CTX *get_thread_default_context(void)
166 if (!RUN_ONCE(&default_context_init, default_context_do_init))
169 return CRYPTO_THREAD_get_local(&default_context_thread_local);
172 static OSSL_LIB_CTX *get_default_context(void)
174 OSSL_LIB_CTX *current_defctx = get_thread_default_context();
176 if (current_defctx == NULL)
177 current_defctx = &default_context_int;
178 return current_defctx;
181 static int set_default_context(OSSL_LIB_CTX *defctx)
183 if (defctx == &default_context_int)
186 return CRYPTO_THREAD_set_local(&default_context_thread_local, defctx);
190 OSSL_LIB_CTX *OSSL_LIB_CTX_new(void)
192 OSSL_LIB_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx));
194 if (ctx != NULL && !context_init(ctx)) {
202 OSSL_LIB_CTX *OSSL_LIB_CTX_new_from_dispatch(const OSSL_CORE_HANDLE *handle,
203 const OSSL_DISPATCH *in)
205 OSSL_LIB_CTX *ctx = OSSL_LIB_CTX_new();
210 if (!ossl_bio_init_core(ctx, in)) {
211 OSSL_LIB_CTX_free(ctx);
218 OSSL_LIB_CTX *OSSL_LIB_CTX_new_child(const OSSL_CORE_HANDLE *handle,
219 const OSSL_DISPATCH *in)
221 OSSL_LIB_CTX *ctx = OSSL_LIB_CTX_new_from_dispatch(handle, in);
226 if (!ossl_provider_init_as_child(ctx, handle, in)) {
227 OSSL_LIB_CTX_free(ctx);
235 int OSSL_LIB_CTX_load_config(OSSL_LIB_CTX *ctx, const char *config_file)
237 return CONF_modules_load_file_ex(ctx, config_file, NULL, 0) > 0;
241 void OSSL_LIB_CTX_free(OSSL_LIB_CTX *ctx)
243 if (ossl_lib_ctx_is_default(ctx))
248 ossl_provider_deinit_child(ctx);
255 OSSL_LIB_CTX *OSSL_LIB_CTX_get0_global_default(void)
257 if (!RUN_ONCE(&default_context_init, default_context_do_init))
260 return &default_context_int;
263 OSSL_LIB_CTX *OSSL_LIB_CTX_set0_default(OSSL_LIB_CTX *libctx)
265 OSSL_LIB_CTX *current_defctx;
267 if ((current_defctx = get_default_context()) != NULL) {
269 set_default_context(libctx);
270 return current_defctx;
277 OSSL_LIB_CTX *ossl_lib_ctx_get_concrete(OSSL_LIB_CTX *ctx)
281 return get_default_context();
286 int ossl_lib_ctx_is_default(OSSL_LIB_CTX *ctx)
289 if (ctx == NULL || ctx == get_default_context())
295 int ossl_lib_ctx_is_global_default(OSSL_LIB_CTX *ctx)
298 if (ossl_lib_ctx_get_concrete(ctx) == &default_context_int)
304 static void ossl_lib_ctx_generic_new(void *parent_ign, void *ptr_ign,
305 CRYPTO_EX_DATA *ad, int index,
306 long argl_ign, void *argp)
308 const OSSL_LIB_CTX_METHOD *meth = argp;
309 OSSL_LIB_CTX *ctx = ossl_crypto_ex_data_get_ossl_lib_ctx(ad);
310 void *ptr = meth->new_func(ctx);
313 if (!CRYPTO_THREAD_write_lock(ctx->lock))
315 * Can't return something, so best to hope that something will
319 CRYPTO_set_ex_data(ad, index, ptr);
320 CRYPTO_THREAD_unlock(ctx->lock);
323 static void ossl_lib_ctx_generic_free(void *parent_ign, void *ptr,
324 CRYPTO_EX_DATA *ad, int index,
325 long argl_ign, void *argp)
327 const OSSL_LIB_CTX_METHOD *meth = argp;
329 meth->free_func(ptr);
332 static int ossl_lib_ctx_init_index(OSSL_LIB_CTX *ctx, int static_index,
333 const OSSL_LIB_CTX_METHOD *meth)
337 ctx = ossl_lib_ctx_get_concrete(ctx);
341 idx = ossl_crypto_get_ex_new_index_ex(ctx, CRYPTO_EX_INDEX_OSSL_LIB_CTX, 0,
343 ossl_lib_ctx_generic_new,
344 NULL, ossl_lib_ctx_generic_free,
349 ctx->dyn_indexes[static_index] = idx;
353 void *ossl_lib_ctx_get_data(OSSL_LIB_CTX *ctx, int index,
354 const OSSL_LIB_CTX_METHOD *meth)
359 ctx = ossl_lib_ctx_get_concrete(ctx);
363 if (!CRYPTO_THREAD_read_lock(ctx->lock))
365 dynidx = ctx->dyn_indexes[index];
366 CRYPTO_THREAD_unlock(ctx->lock);
369 if (!CRYPTO_THREAD_read_lock(ctx->index_locks[index]))
371 if (!CRYPTO_THREAD_read_lock(ctx->lock)) {
372 CRYPTO_THREAD_unlock(ctx->index_locks[index]);
375 data = CRYPTO_get_ex_data(&ctx->data, dynidx);
376 CRYPTO_THREAD_unlock(ctx->lock);
377 CRYPTO_THREAD_unlock(ctx->index_locks[index]);
381 if (!CRYPTO_THREAD_write_lock(ctx->index_locks[index]))
383 if (!CRYPTO_THREAD_write_lock(ctx->lock)) {
384 CRYPTO_THREAD_unlock(ctx->index_locks[index]);
388 dynidx = ctx->dyn_indexes[index];
390 data = CRYPTO_get_ex_data(&ctx->data, dynidx);
391 CRYPTO_THREAD_unlock(ctx->lock);
392 CRYPTO_THREAD_unlock(ctx->index_locks[index]);
396 if (!ossl_lib_ctx_init_index(ctx, index, meth)) {
397 CRYPTO_THREAD_unlock(ctx->lock);
398 CRYPTO_THREAD_unlock(ctx->index_locks[index]);
402 CRYPTO_THREAD_unlock(ctx->lock);
405 * The alloc call ensures there's a value there. We release the ctx->lock
406 * for this, because the allocation itself may recursively call
407 * ossl_lib_ctx_get_data for other indexes (never this one). The allocation
408 * will itself aquire the ctx->lock when it actually comes to store the
409 * allocated data (see ossl_lib_ctx_generic_new() above). We call
410 * ossl_crypto_alloc_ex_data_intern() here instead of CRYPTO_alloc_ex_data().
411 * They do the same thing except that the latter calls CRYPTO_get_ex_data()
412 * as well - which we must not do without holding the ctx->lock.
414 if (ossl_crypto_alloc_ex_data_intern(CRYPTO_EX_INDEX_OSSL_LIB_CTX, NULL,
415 &ctx->data, ctx->dyn_indexes[index])) {
416 if (!CRYPTO_THREAD_read_lock(ctx->lock))
418 data = CRYPTO_get_ex_data(&ctx->data, ctx->dyn_indexes[index]);
419 CRYPTO_THREAD_unlock(ctx->lock);
423 CRYPTO_THREAD_unlock(ctx->index_locks[index]);
427 OSSL_EX_DATA_GLOBAL *ossl_lib_ctx_get_ex_data_global(OSSL_LIB_CTX *ctx)
429 ctx = ossl_lib_ctx_get_concrete(ctx);
435 int ossl_lib_ctx_run_once(OSSL_LIB_CTX *ctx, unsigned int idx,
436 ossl_lib_ctx_run_once_fn run_once_fn)
438 int done = 0, ret = 0;
440 ctx = ossl_lib_ctx_get_concrete(ctx);
444 if (!CRYPTO_THREAD_read_lock(ctx->oncelock))
446 done = ctx->run_once_done[idx];
448 ret = ctx->run_once_ret[idx];
449 CRYPTO_THREAD_unlock(ctx->oncelock);
454 if (!CRYPTO_THREAD_write_lock(ctx->oncelock))
456 if (ctx->run_once_done[idx]) {
457 ret = ctx->run_once_ret[idx];
458 CRYPTO_THREAD_unlock(ctx->oncelock);
462 ret = run_once_fn(ctx);
463 ctx->run_once_done[idx] = 1;
464 ctx->run_once_ret[idx] = ret;
465 CRYPTO_THREAD_unlock(ctx->oncelock);
470 int ossl_lib_ctx_onfree(OSSL_LIB_CTX *ctx, ossl_lib_ctx_onfree_fn onfreefn)
472 struct ossl_lib_ctx_onfree_list_st *newonfree
473 = OPENSSL_malloc(sizeof(*newonfree));
475 if (newonfree == NULL)
478 newonfree->fn = onfreefn;
479 newonfree->next = ctx->onfreelist;
480 ctx->onfreelist = newonfree;
485 const char *ossl_lib_ctx_get_descriptor(OSSL_LIB_CTX *libctx)
488 return "FIPS internal library context";
490 if (ossl_lib_ctx_is_global_default(libctx))
491 return "Global default library context";
492 if (ossl_lib_ctx_is_default(libctx))
493 return "Thread-local default library context";
494 return "Non-default library context";