// Copyright 2015-2020 Espressif Systems (Shanghai) PTE LTD // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. #include #include "esp_crypto_lock.h" /* Lock overview: SHA: peripheral independent, but DMA is shared with AES AES: peripheral independent, but DMA is shared with SHA MPI/RSA: independent HMAC: needs SHA DS: needs HMAC (which needs SHA), AES and MPI */ /* Single lock for SHA and AES, sharing a reserved GDMA channel */ static _lock_t s_crypto_sha_aes_lock; /* Lock for the MPI/RSA peripheral, also used by the DS peripheral */ static _lock_t s_crypto_mpi_lock; void esp_crypto_sha_aes_lock_acquire(void) { _lock_acquire(&s_crypto_sha_aes_lock); } void esp_crypto_sha_aes_lock_release(void) { _lock_release(&s_crypto_sha_aes_lock); } void esp_crypto_mpi_lock_acquire(void) { _lock_acquire(&s_crypto_mpi_lock); } void esp_crypto_mpi_lock_release(void) { _lock_release(&s_crypto_mpi_lock); }