kopia lustrzana https://github.com/espressif/esp-idf
122 wiersze
3.7 KiB
C
122 wiersze
3.7 KiB
C
/*
|
|
* SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#include "sdkconfig.h"
|
|
|
|
#pragma once
|
|
|
|
#include <stdint.h>
|
|
#include "ets_sys.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
void ets_secure_boot_start(void);
|
|
|
|
void ets_secure_boot_finish(void);
|
|
|
|
void ets_secure_boot_hash(const uint32_t *buf);
|
|
|
|
void ets_secure_boot_obtain(void);
|
|
|
|
int ets_secure_boot_check(uint32_t *buf);
|
|
|
|
void ets_secure_boot_rd_iv(uint32_t *buf);
|
|
|
|
void ets_secure_boot_rd_abstract(uint32_t *buf);
|
|
|
|
bool ets_secure_boot_check_start(uint8_t abs_index, uint32_t iv_addr);
|
|
|
|
int ets_secure_boot_check_finish(uint32_t *abstract);
|
|
|
|
#ifdef CONFIG_ESP32_REV_MIN_3
|
|
#include "rsa_pss.h"
|
|
|
|
#define SECURE_BOOT_NUM_BLOCKS 1
|
|
|
|
#define CRC_SIGN_BLOCK_LEN 1196
|
|
#define SIG_BLOCK_PADDING 4096
|
|
#define ETS_SECURE_BOOT_V2_SIGNATURE_MAGIC 0xE7
|
|
|
|
// Anti-FI measure: use full words for success/fail internally, instead of 0/non-zero
|
|
typedef enum {
|
|
SBV2_SUCCESS = 0x3A5A5AA5,
|
|
SB_SUCCESS = 0x3A5A5AA5,
|
|
SBV2_FAILED = 0xA533885A,
|
|
SB_FAILED = 0xA533885A,
|
|
} secure_boot_v2_status_t;
|
|
|
|
/* Secure Boot Version 2 signature format for ESP32 ECO3 */
|
|
typedef struct {
|
|
uint8_t magic_byte;
|
|
uint8_t version;
|
|
uint8_t _reserved1;
|
|
uint8_t _reserved2;
|
|
uint8_t image_digest[32];
|
|
ets_rsa_pubkey_t key;
|
|
uint8_t signature[384];
|
|
uint32_t block_crc;
|
|
uint8_t _padding[16];
|
|
} ets_secure_boot_sig_block_t;
|
|
_Static_assert(sizeof(ets_secure_boot_sig_block_t) == 1216, "invalid sig block size");
|
|
|
|
/* ROM supports up to 3, but IDF only checks the first one (SECURE_BOOT_NUM_BLOCKS) */
|
|
#define SECURE_BOOT_MAX_APPENDED_SIGN_BLOCKS_TO_IMAGE 3
|
|
|
|
/* Multiple key block support */
|
|
typedef struct {
|
|
ets_secure_boot_sig_block_t block[SECURE_BOOT_MAX_APPENDED_SIGN_BLOCKS_TO_IMAGE];
|
|
uint8_t _padding[4096 - (sizeof(ets_secure_boot_sig_block_t) * SECURE_BOOT_MAX_APPENDED_SIGN_BLOCKS_TO_IMAGE)];
|
|
} ets_secure_boot_signature_t;
|
|
|
|
_Static_assert(sizeof(ets_secure_boot_signature_t) == 4096, "invalid sig sector size");
|
|
|
|
typedef struct {
|
|
const void *key_digests[SECURE_BOOT_NUM_BLOCKS];
|
|
} ets_secure_boot_key_digests_t;
|
|
|
|
/** @brief Verifies the signature block appended to a firmware image. Implemented in the ROM.
|
|
*
|
|
* This function is used to verify the bootloader before burning its public key hash into Efuse.
|
|
* Also, it is used to verify the app on loading the image on boot and on OTA.
|
|
*
|
|
* @param sig The signature block flashed aligned 4096 bytes from the firmware. (ROM implementation expects 3 blocks, sig->block[3]).
|
|
* @param image_digest The SHA-256 Digest of the firmware to be verified
|
|
* @param trusted_key_digest The SHA-256 Digest of the public key (ets_rsa_pubkey_t) of a single signature block.
|
|
* @param verified_digest RSA-PSS signature of image_digest. Pass an uninitialised array.
|
|
*
|
|
* @return SBV2_SUCCESS if signature is valid
|
|
* SBV2_FAILED for failures.
|
|
*/
|
|
secure_boot_v2_status_t ets_secure_boot_verify_signature(const ets_secure_boot_signature_t *sig, const uint8_t *image_digest, const uint8_t *trusted_key_digest, uint8_t *verified_digest);
|
|
|
|
/** @brief This function verifies the 1st stage bootloader. Implemented in the ROM.
|
|
* Reboots post verification. It reads the Efuse key for verification of the public key.
|
|
*
|
|
* This function is not used in the current workflow.
|
|
*
|
|
*/
|
|
void ets_secure_boot_verify_boot_bootloader(void);
|
|
|
|
/** @brief Confirms if the secure boot V2 has been enabled. Implemented in the ROM.
|
|
*
|
|
* In ESP32-ECO3 - It checks the value of ABS_DONE_1 in EFuse.
|
|
*
|
|
* @return true if is Secure boot v2 has been enabled
|
|
* False if Secure boot v2 has not been enabled.
|
|
*/
|
|
bool ets_use_secure_boot_v2(void);
|
|
|
|
#else
|
|
#define SECURE_BOOT_NUM_BLOCKS 0
|
|
|
|
#endif /* CONFIG_ESP32_REV_MIN_3 */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|