311 lines
9.1 KiB
C
311 lines
9.1 KiB
C
/*
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* Threading abstraction layer
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*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
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*/
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#include "tf_psa_crypto_common.h"
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#if defined(MBEDTLS_THREADING_C)
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#include "threading_internal.h"
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#include <psa/crypto_values.h>
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#if defined(MBEDTLS_HAVE_TIME_DATE) && !defined(MBEDTLS_PLATFORM_GMTIME_R_ALT)
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#if defined(MBEDTLS_PLATFORM_IS_UNIXLIKE)
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#include <unistd.h>
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#endif /* !_WIN32 && (unix || __unix || __unix__ ||
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* (__APPLE__ && __MACH__)) */
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#if !((defined(_POSIX_VERSION) && _POSIX_VERSION >= 200809L) || \
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(defined(_POSIX_THREAD_SAFE_FUNCTIONS) && \
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_POSIX_THREAD_SAFE_FUNCTIONS >= 200112L))
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/*
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* This is a convenience shorthand macro to avoid checking the long
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* preprocessor conditions above. Ideally, we could expose this macro in
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* platform_util.h and simply use it in platform_util.c, threading.c and
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* threading.h. However, this macro is not part of the Mbed TLS public API, so
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* we keep it private by only defining it in this file
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*/
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#if !(defined(_WIN32) && !defined(EFIX64) && !defined(EFI32))
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#define THREADING_USE_GMTIME
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#endif /* ! ( defined(_WIN32) && !defined(EFIX64) && !defined(EFI32) ) */
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#endif /* !( ( defined(_POSIX_VERSION) && _POSIX_VERSION >= 200809L ) || \
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( defined(_POSIX_THREAD_SAFE_FUNCTIONS ) && \
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_POSIX_THREAD_SAFE_FUNCTIONS >= 200112L ) ) */
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#endif /* MBEDTLS_HAVE_TIME_DATE && !MBEDTLS_PLATFORM_GMTIME_R_ALT */
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#if defined(MBEDTLS_THREADING_PTHREAD)
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static int err_from_posix(int posix_ret)
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{
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switch (posix_ret) {
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case 0:
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return 0;
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default:
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return MBEDTLS_ERR_THREADING_USAGE_ERROR;
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}
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}
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static int threading_mutex_init_pthread(mbedtls_platform_mutex_t *mutex)
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{
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int posix_ret = pthread_mutex_init(mutex, NULL);
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return err_from_posix(posix_ret);
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}
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static void threading_mutex_destroy_pthread(mbedtls_platform_mutex_t *mutex)
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{
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(void) pthread_mutex_destroy(mutex);
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}
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static int threading_mutex_lock_pthread(mbedtls_platform_mutex_t *mutex)
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{
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int posix_ret = pthread_mutex_lock(mutex);
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return err_from_posix(posix_ret);
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}
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static int threading_mutex_unlock_pthread(mbedtls_platform_mutex_t *mutex)
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{
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int posix_ret = pthread_mutex_unlock(mutex);
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return err_from_posix(posix_ret);
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}
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int (*mbedtls_mutex_init_ptr)(mbedtls_platform_mutex_t *) = threading_mutex_init_pthread;
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void (*mbedtls_mutex_free_ptr)(mbedtls_platform_mutex_t *) = threading_mutex_destroy_pthread;
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int (*mbedtls_mutex_lock_ptr)(mbedtls_platform_mutex_t *) = threading_mutex_lock_pthread;
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int (*mbedtls_mutex_unlock_ptr)(mbedtls_platform_mutex_t *) = threading_mutex_unlock_pthread;
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/*
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* With pthreads we can statically initialize mutexes
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*/
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#define MUTEX_INIT = { PTHREAD_MUTEX_INITIALIZER, 1, 1 }
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int mbedtls_condition_variable_init(
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mbedtls_threading_condition_variable_t *cond)
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{
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int posix_ret = pthread_cond_init(&cond->cond, NULL);
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return err_from_posix(posix_ret);
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}
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void mbedtls_condition_variable_free(
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mbedtls_threading_condition_variable_t *cond)
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{
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(void) pthread_cond_destroy(&cond->cond);
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}
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int mbedtls_condition_variable_signal(
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mbedtls_threading_condition_variable_t *cond)
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{
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int posix_ret = pthread_cond_signal(&cond->cond);
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return err_from_posix(posix_ret);
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}
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int mbedtls_condition_variable_broadcast(
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mbedtls_threading_condition_variable_t *cond)
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{
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int posix_ret = pthread_cond_broadcast(&cond->cond);
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return err_from_posix(posix_ret);
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}
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int mbedtls_condition_variable_wait(
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mbedtls_threading_condition_variable_t *cond,
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mbedtls_threading_mutex_t *mutex)
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{
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int posix_ret = pthread_cond_wait(&cond->cond, &mutex->mutex);
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return err_from_posix(posix_ret);
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}
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#endif /* MBEDTLS_THREADING_PTHREAD */
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#if defined(MBEDTLS_THREADING_ALT)
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static int threading_mutex_fail(mbedtls_platform_mutex_t *mutex)
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{
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((void) mutex);
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return PSA_ERROR_BAD_STATE;
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}
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static void threading_mutex_dummy(mbedtls_platform_mutex_t *mutex)
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{
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((void) mutex);
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return;
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}
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int (*mbedtls_mutex_init_ptr)(mbedtls_platform_mutex_t *) = threading_mutex_fail;
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void (*mbedtls_mutex_free_ptr)(mbedtls_platform_mutex_t *) = threading_mutex_dummy;
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int (*mbedtls_mutex_lock_ptr)(mbedtls_platform_mutex_t *) = threading_mutex_fail;
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int (*mbedtls_mutex_unlock_ptr)(mbedtls_platform_mutex_t *) = threading_mutex_fail;
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#endif /* MBEDTLS_THREADING_ALT */
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void mbedtls_mutex_init(mbedtls_threading_mutex_t *mutex)
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{
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int ret = (*mbedtls_mutex_init_ptr)(&mutex->mutex);
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mutex->initialized = (ret == 0);
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}
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void mbedtls_mutex_free(mbedtls_threading_mutex_t *mutex)
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{
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if (!mutex->initialized) {
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return;
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}
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(*mbedtls_mutex_free_ptr)(&mutex->mutex);
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mutex->initialized = 0;
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}
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int mbedtls_mutex_lock(mbedtls_threading_mutex_t *mutex)
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{
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if (!mutex->initialized) {
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return MBEDTLS_ERR_THREADING_USAGE_ERROR;
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}
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return (*mbedtls_mutex_lock_ptr)(&mutex->mutex);
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}
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int mbedtls_mutex_unlock(mbedtls_threading_mutex_t *mutex)
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{
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if (!mutex->initialized) {
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return MBEDTLS_ERR_THREADING_USAGE_ERROR;
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}
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return (*mbedtls_mutex_unlock_ptr)(&mutex->mutex);
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}
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#if defined(MBEDTLS_THREADING_ALT)
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static int (*cond_init_ptr)(mbedtls_platform_condition_variable_t *) = NULL;
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int mbedtls_condition_variable_init(
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mbedtls_threading_condition_variable_t *cond)
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{
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if (*cond_init_ptr == NULL) {
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return PSA_ERROR_BAD_STATE;
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}
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return (*cond_init_ptr)(&cond->cond);
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}
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static void (*cond_destroy_ptr)(mbedtls_platform_condition_variable_t *) = NULL;
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void mbedtls_condition_variable_free(
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mbedtls_threading_condition_variable_t *cond)
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{
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if (*cond_destroy_ptr == NULL) {
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return;
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}
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(*cond_destroy_ptr)(&cond->cond);
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}
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static int (*cond_signal_ptr)(mbedtls_platform_condition_variable_t *) = NULL;
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int mbedtls_condition_variable_signal(
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mbedtls_threading_condition_variable_t *cond)
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{
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if (*cond_signal_ptr == NULL) {
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return PSA_ERROR_BAD_STATE;
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}
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return (*cond_signal_ptr)(&cond->cond);
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}
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static int (*cond_broadcast_ptr)(mbedtls_platform_condition_variable_t *) = NULL;
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int mbedtls_condition_variable_broadcast(
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mbedtls_threading_condition_variable_t *cond)
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{
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if (*cond_broadcast_ptr == NULL) {
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return PSA_ERROR_BAD_STATE;
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}
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return (*cond_broadcast_ptr)(&cond->cond);
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}
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static int (*cond_wait_ptr)(mbedtls_platform_condition_variable_t *,
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mbedtls_platform_mutex_t *) = NULL;
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int mbedtls_condition_variable_wait(
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mbedtls_threading_condition_variable_t *cond,
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mbedtls_threading_mutex_t *mutex)
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{
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if (*cond_wait_ptr == NULL) {
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return PSA_ERROR_BAD_STATE;
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}
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return (*cond_wait_ptr)(&cond->cond, &mutex->mutex);
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}
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/*
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* Set functions pointers and initialize global mutexes
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*/
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void mbedtls_threading_set_alt(
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int (*mutex_init)(mbedtls_platform_mutex_t *),
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void (*mutex_destroy)(mbedtls_platform_mutex_t *),
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int (*mutex_lock)(mbedtls_platform_mutex_t *),
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int (*mutex_unlock)(mbedtls_platform_mutex_t *),
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int (*cond_init)(mbedtls_platform_condition_variable_t *),
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void (*cond_destroy)(mbedtls_platform_condition_variable_t *),
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int (*cond_signal)(mbedtls_platform_condition_variable_t *),
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int (*cond_broadcast)(mbedtls_platform_condition_variable_t *),
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int (*cond_wait)(mbedtls_platform_condition_variable_t *,
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mbedtls_platform_mutex_t *))
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{
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mbedtls_mutex_init_ptr = mutex_init;
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mbedtls_mutex_free_ptr = mutex_destroy;
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mbedtls_mutex_lock_ptr = mutex_lock;
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mbedtls_mutex_unlock_ptr = mutex_unlock;
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cond_init_ptr = cond_init;
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cond_destroy_ptr = cond_destroy;
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cond_signal_ptr = cond_signal;
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cond_broadcast_ptr = cond_broadcast;
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cond_wait_ptr = cond_wait;
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#if defined(MBEDTLS_FS_IO)
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mbedtls_mutex_init(&mbedtls_threading_readdir_mutex);
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#endif
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#if defined(THREADING_USE_GMTIME)
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mbedtls_mutex_init(&mbedtls_threading_gmtime_mutex);
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#endif
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#if defined(MBEDTLS_PSA_CRYPTO_C)
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mbedtls_mutex_init(&mbedtls_threading_key_slot_mutex);
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mbedtls_mutex_init(&mbedtls_threading_psa_globaldata_mutex);
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mbedtls_mutex_init(&mbedtls_threading_psa_rngdata_mutex);
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#endif
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}
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/*
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* Free global mutexes
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*/
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void mbedtls_threading_free_alt(void)
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{
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#if defined(MBEDTLS_FS_IO)
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mbedtls_mutex_free(&mbedtls_threading_readdir_mutex);
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#endif
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#if defined(THREADING_USE_GMTIME)
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mbedtls_mutex_free(&mbedtls_threading_gmtime_mutex);
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#endif
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#if defined(MBEDTLS_PSA_CRYPTO_C)
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mbedtls_mutex_free(&mbedtls_threading_key_slot_mutex);
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mbedtls_mutex_free(&mbedtls_threading_psa_globaldata_mutex);
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mbedtls_mutex_free(&mbedtls_threading_psa_rngdata_mutex);
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#endif
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}
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#endif /* MBEDTLS_THREADING_ALT */
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/*
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* Define global mutexes
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*/
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#ifndef MUTEX_INIT
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#define MUTEX_INIT
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#endif
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#if defined(MBEDTLS_FS_IO)
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mbedtls_threading_mutex_t mbedtls_threading_readdir_mutex MUTEX_INIT;
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#endif
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#if defined(THREADING_USE_GMTIME)
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mbedtls_threading_mutex_t mbedtls_threading_gmtime_mutex MUTEX_INIT;
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#endif
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#if defined(MBEDTLS_PSA_CRYPTO_C)
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mbedtls_threading_mutex_t mbedtls_threading_key_slot_mutex MUTEX_INIT;
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mbedtls_threading_mutex_t mbedtls_threading_psa_globaldata_mutex MUTEX_INIT;
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mbedtls_threading_mutex_t mbedtls_threading_psa_rngdata_mutex MUTEX_INIT;
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#endif
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#endif /* MBEDTLS_THREADING_C */
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