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esp32c6: Enable ECDSA based secure boot

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- Updated documentation for C6
This commit is contained in:
Sachin Parekh
2023-01-09 22:32:19 +05:30
parent a3c341384f
commit 2bb9499a7e
14 changed files with 192 additions and 37 deletions
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26
components/esp_rom/include/esp32c6/rom/ecdsa.h Normal file
View File

@@ -0,0 +1,26 @@
/*
* SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
#define ETS_DIGEST_LEN 32 /* SHA-256, bytes */
typedef enum {
ECDSA_CURVE_P192 = 1,
ECDSA_CURVE_P256 = 2
} ECDSA_CURVE;
int ets_ecdsa_verify(const uint8_t *key, const uint8_t *sig, ECDSA_CURVE curve_id, const uint8_t *digest, uint8_t *verified_digest);
#ifdef __cplusplus
}
#endif

28
components/esp_rom/include/esp32c6/rom/secure_boot.h
View File

@@ -9,6 +9,7 @@
#include <stdint.h>
#include <stdbool.h>
#include "ets_sys.h"
#include "ecdsa.h"
#include "rsa_pss.h"
#include "esp_assert.h"
@@ -16,6 +17,8 @@
extern "C" {
#endif
#if CONFIG_SECURE_BOOT_V2_ENABLED || CONFIG_SECURE_SIGNED_APPS_NO_SECURE_BOOT
typedef struct ets_secure_boot_sig_block ets_secure_boot_sig_block_t;
typedef struct ets_secure_boot_signature ets_secure_boot_signature_t;
typedef struct ets_secure_boot_key_digests ets_secure_boot_key_digests_t;
@@ -69,6 +72,8 @@ void ets_secure_boot_revoke_public_key_digest(int index);
(Up to 3 in a signature sector are appended to the image)
*/
#if CONFIG_SECURE_SIGNED_APPS_RSA_SCHEME
struct ets_secure_boot_sig_block {
uint8_t magic_byte;
uint8_t version;
@@ -81,6 +86,27 @@ struct ets_secure_boot_sig_block {
uint8_t _padding[16];
};
#elif CONFIG_SECURE_SIGNED_APPS_ECDSA_V2_SCHEME
struct __attribute((packed)) ets_secure_boot_sig_block {
uint8_t magic_byte;
uint8_t version;
uint8_t _reserved1;
uint8_t _reserved2;
uint8_t image_digest[32];
struct {
struct {
uint8_t curve_id; /* ETS_ECDSA_CURVE_P192 / ETS_ECDSA_CURVE_P256 */
uint8_t point[64]; /* X followed by Y (both little-endian), plus zero bytes if P192 */
} key;
uint8_t signature[64]; /* r followed by s (both little-endian) */
uint8_t padding[1031];
} ecdsa;
uint32_t block_crc; /* note: crc covers all bytes in the structure before it, regardless of version field */
uint8_t _padding[16];
};
#endif
ESP_STATIC_ASSERT(sizeof(ets_secure_boot_sig_block_t) == 1216, "invalid sig block size");
#define SECURE_BOOT_NUM_BLOCKS 3
@@ -100,6 +126,8 @@ struct ets_secure_boot_key_digests {
bool allow_key_revoke;
};
#endif /* CONFIG_SECURE_BOOT_V2_ENABLED || CONFIG_SECURE_SIGNED_APPS_NO_SECURE_BOOT */
#ifdef __cplusplus
}
#endif