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48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
// Copyright 2015-2020 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "esp32s2/rom/hmac.h"
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#include "esp32s2/rom/ets_sys.h"
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#include "esp_hmac.h"
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#include "esp_crypto_lock.h"
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static ets_efuse_block_t convert_key_type(hmac_key_id_t key_id) {
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return ETS_EFUSE_BLOCK_KEY0 + (ets_efuse_block_t) key_id;
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}
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esp_err_t esp_hmac_calculate(hmac_key_id_t key_id,
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const void *message,
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size_t message_len,
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uint8_t *hmac)
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{
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int hmac_ret;
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if (!message || !hmac) return ESP_ERR_INVALID_ARG;
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if (key_id >= HMAC_KEY_MAX) return ESP_ERR_INVALID_ARG;
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esp_crypto_dma_lock_acquire();
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ets_hmac_enable();
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hmac_ret = ets_hmac_calculate_message(convert_key_type(key_id), message, message_len, hmac);
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ets_hmac_disable();
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esp_crypto_dma_lock_release();
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if (hmac_ret != ETS_OK) {
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return ESP_FAIL;
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} else {
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return ESP_OK;
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}
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}
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