52 lines
1.6 KiB
C
52 lines
1.6 KiB
C
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// Copyright 2015-2016 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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#ifndef __ESP32_SECUREBOOT_H
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#define __ESP32_SECUREBOOT_H
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#include <stdbool.h>
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#include <esp_err.h>
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/* Support functions for secure boot features.
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Can be compiled as part of app or bootloader code.
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*/
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/** @brief Is secure boot currently enabled in hardware?
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*
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* Secure boot is enabled if the ABS_DONE_0 efuse is blown. This means
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* that the ROM bootloader code will only boot a verified secure
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* bootloader digest from now on.
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*
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* @return true if secure boot is enabled.
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*/
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bool esp_secure_boot_enabled(void);
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/** @brief Enable secure boot if it isw not already enabled.
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*
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* @important If this function succeeds, secure boot is permanentl
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* enabled on the chip via efuse.
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*
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* This function is intended to be called from bootloader code.
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*
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* @return ESP_ERR_INVALID_STATE if efuse state doesn't allow
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* secure boot to be enabled cleanly. ESP_OK if secure boot
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* is enabled on this chip from now on.
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*/
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esp_err_t esp_secure_boot_enable(void);
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#endif
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