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/*
* Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include "crypto/cryptlib.h"
#include <openssl/conf.h>
#include "internal/thread_once.h"
#include "internal/property.h"
struct openssl_ctx_onfree_list_st {
openssl_ctx_onfree_fn *fn;
struct openssl_ctx_onfree_list_st *next;
};
struct openssl_ctx_st {
CRYPTO_RWLOCK *lock;
CRYPTO_EX_DATA data;
/*
* For most data in the OPENSSL_CTX we just use ex_data to store it. But
* that doesn't work for ex_data itself - so we store that directly.
*/
OSSL_EX_DATA_GLOBAL global;
/* Map internal static indexes to dynamically created indexes */
int dyn_indexes[OPENSSL_CTX_MAX_INDEXES];
/* Keep a separate lock for each index */
CRYPTO_RWLOCK *index_locks[OPENSSL_CTX_MAX_INDEXES];
CRYPTO_RWLOCK *oncelock;
int run_once_done[OPENSSL_CTX_MAX_RUN_ONCE];
int run_once_ret[OPENSSL_CTX_MAX_RUN_ONCE];
struct openssl_ctx_onfree_list_st *onfreelist;
};
#ifndef FIPS_MODE
static OPENSSL_CTX default_context_int;
/* Always points at default_context_int if it has been initialised */
static OPENSSL_CTX *default_context = NULL;
#endif
static int context_init(OPENSSL_CTX *ctx)
{
size_t i;
int exdata_done = 0;
ctx->lock = CRYPTO_THREAD_lock_new();
if (ctx->lock == NULL)
return 0;
ctx->oncelock = CRYPTO_THREAD_lock_new();
if (ctx->oncelock == NULL)
goto err;
for (i = 0; i < OPENSSL_CTX_MAX_INDEXES; i++) {
ctx->index_locks[i] = CRYPTO_THREAD_lock_new();
ctx->dyn_indexes[i] = -1;
if (ctx->index_locks[i] == NULL)
goto err;
}
/* OPENSSL_CTX is built on top of ex_data so we initialise that directly */
if (!do_ex_data_init(ctx))
goto err;
exdata_done = 1;
if (!crypto_new_ex_data_ex(ctx, CRYPTO_EX_INDEX_OPENSSL_CTX, NULL,
&ctx->data)) {
crypto_cleanup_all_ex_data_int(ctx);
goto err;
}
/* Everything depends on properties, so we also pre-initialise that */
if (!ossl_property_parse_init(ctx))
goto err;
return 1;
err:
if (exdata_done)
crypto_cleanup_all_ex_data_int(ctx);
CRYPTO_THREAD_lock_free(ctx->oncelock);
CRYPTO_THREAD_lock_free(ctx->lock);
ctx->lock = NULL;
return 0;
}
static int context_deinit(OPENSSL_CTX *ctx)
{
struct openssl_ctx_onfree_list_st *tmp, *onfree;
int i;
if (ctx == NULL)
return 1;
ossl_ctx_thread_stop(ctx);
onfree = ctx->onfreelist;
while (onfree != NULL) {
onfree->fn(ctx);
tmp = onfree;
onfree = onfree->next;
OPENSSL_free(tmp);
}
CRYPTO_free_ex_data(CRYPTO_EX_INDEX_OPENSSL_CTX, NULL, &ctx->data);
crypto_cleanup_all_ex_data_int(ctx);
for (i = 0; i < OPENSSL_CTX_MAX_INDEXES; i++)
CRYPTO_THREAD_lock_free(ctx->index_locks[i]);
CRYPTO_THREAD_lock_free(ctx->oncelock);
CRYPTO_THREAD_lock_free(ctx->lock);
ctx->lock = NULL;
return 1;
}
#ifndef FIPS_MODE
void openssl_ctx_default_deinit(void)
{
context_deinit(default_context);
}
static CRYPTO_ONCE default_context_init = CRYPTO_ONCE_STATIC_INIT;
DEFINE_RUN_ONCE_STATIC(do_default_context_init)
{
if (context_init(&default_context_int))
default_context = &default_context_int;
return 1;
}
#endif
OPENSSL_CTX *OPENSSL_CTX_new(void)
{
OPENSSL_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx));
if (ctx != NULL && !context_init(ctx)) {
OPENSSL_CTX_free(ctx);
ctx = NULL;
}
return ctx;
}
#ifndef FIPS_MODE
int OPENSSL_CTX_load_config(OPENSSL_CTX *ctx, const char *config_file)
{
return CONF_modules_load_file_with_libctx(ctx, config_file, NULL, 0) > 0;
}
#endif
void OPENSSL_CTX_free(OPENSSL_CTX *ctx)
{
if (ctx != NULL)
context_deinit(ctx);
OPENSSL_free(ctx);
}
OPENSSL_CTX *openssl_ctx_get_concrete(OPENSSL_CTX *ctx)
{
#ifndef FIPS_MODE
if (ctx == NULL) {
if (!RUN_ONCE(&default_context_init, do_default_context_init))
return 0;
return default_context;
}
#endif
return ctx;
}
int openssl_ctx_is_default(OPENSSL_CTX *ctx)
{
#ifndef FIPS_MODE
if (ctx == NULL || ctx == default_context)
return 1;
#endif
return 0;
}
static void openssl_ctx_generic_new(void *parent_ign, void *ptr_ign,
CRYPTO_EX_DATA *ad, int index,
long argl_ign, void *argp)
{
const OPENSSL_CTX_METHOD *meth = argp;
void *ptr = meth->new_func(crypto_ex_data_get_openssl_ctx(ad));
if (ptr != NULL)
CRYPTO_set_ex_data(ad, index, ptr);
}
static void openssl_ctx_generic_free(void *parent_ign, void *ptr,
CRYPTO_EX_DATA *ad, int index,
long argl_ign, void *argp)
{
const OPENSSL_CTX_METHOD *meth = argp;
meth->free_func(ptr);
}
/* Non-static so we can use it in context_internal_test */
static int openssl_ctx_init_index(OPENSSL_CTX *ctx, int static_index,
const OPENSSL_CTX_METHOD *meth)
{
int idx;
ctx = openssl_ctx_get_concrete(ctx);
if (ctx == NULL)
return 0;
idx = crypto_get_ex_new_index_ex(ctx, CRYPTO_EX_INDEX_OPENSSL_CTX, 0,
(void *)meth,
openssl_ctx_generic_new,
NULL, openssl_ctx_generic_free);
if (idx < 0)
return 0;
ctx->dyn_indexes[static_index] = idx;
return 1;
}
void *openssl_ctx_get_data(OPENSSL_CTX *ctx, int index,
const OPENSSL_CTX_METHOD *meth)
{
void *data = NULL;
int dynidx;
ctx = openssl_ctx_get_concrete(ctx);
if (ctx == NULL)
return NULL;
CRYPTO_THREAD_read_lock(ctx->lock);
dynidx = ctx->dyn_indexes[index];
CRYPTO_THREAD_unlock(ctx->lock);
if (dynidx != -1) {
CRYPTO_THREAD_read_lock(ctx->index_locks[index]);
data = CRYPTO_get_ex_data(&ctx->data, dynidx);
CRYPTO_THREAD_unlock(ctx->index_locks[index]);
return data;
}
CRYPTO_THREAD_write_lock(ctx->index_locks[index]);
CRYPTO_THREAD_write_lock(ctx->lock);
dynidx = ctx->dyn_indexes[index];
if (dynidx != -1) {
CRYPTO_THREAD_unlock(ctx->lock);
data = CRYPTO_get_ex_data(&ctx->data, dynidx);
CRYPTO_THREAD_unlock(ctx->index_locks[index]);
return data;
}
if (!openssl_ctx_init_index(ctx, index, meth)) {
CRYPTO_THREAD_unlock(ctx->lock);
CRYPTO_THREAD_unlock(ctx->index_locks[index]);
return NULL;
}
CRYPTO_THREAD_unlock(ctx->lock);
/* The alloc call ensures there's a value there */
if (CRYPTO_alloc_ex_data(CRYPTO_EX_INDEX_OPENSSL_CTX, NULL,
&ctx->data, ctx->dyn_indexes[index]))
data = CRYPTO_get_ex_data(&ctx->data, ctx->dyn_indexes[index]);
CRYPTO_THREAD_unlock(ctx->index_locks[index]);
return data;
}
OSSL_EX_DATA_GLOBAL *openssl_ctx_get_ex_data_global(OPENSSL_CTX *ctx)
{
ctx = openssl_ctx_get_concrete(ctx);
if (ctx == NULL)
return NULL;
return &ctx->global;
}
int openssl_ctx_run_once(OPENSSL_CTX *ctx, unsigned int idx,
openssl_ctx_run_once_fn run_once_fn)
{
int done = 0, ret = 0;
ctx = openssl_ctx_get_concrete(ctx);
if (ctx == NULL)
return<
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