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Merge branch 'feature/adds_fault_injection_protection_for_check_anti_rollback' into 'master'

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bootloader_support: Adds fault injection protection for check_anti_rollback

See merge request espressif/esp-idf!15662
This commit is contained in:
Mahavir Jain 2021-11-25 09:01:59 +00:00
commit ef98a363e3
2 changed files with 23 additions and 3 deletions
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14
components/bootloader_support/src/bootloader_utility.c
View File

@ -90,6 +90,7 @@
#include "bootloader_console.h"
#include "bootloader_soc.h"
#include "esp_efuse.h"
#include "esp_fault.h"
static const char *TAG = "boot";
@ -281,9 +282,16 @@ static esp_err_t write_otadata(esp_ota_select_entry_t *otadata, uint32_t offset,
static bool check_anti_rollback(const esp_partition_pos_t *partition)
{
#ifdef CONFIG_BOOTLOADER_APP_ANTI_ROLLBACK
esp_app_desc_t app_desc;
esp_app_desc_t app_desc = {};
esp_err_t err = bootloader_common_get_partition_description(partition, &app_desc);
return err == ESP_OK && esp_efuse_check_secure_version(app_desc.secure_version) == true;
if (err != ESP_OK) {
ESP_LOGE(TAG, "Failed to get partition description %d", err);
return false;
}
bool sec_ver = esp_efuse_check_secure_version(app_desc.secure_version);
/* Anti FI check */
ESP_FAULT_ASSERT(sec_ver == esp_efuse_check_secure_version(app_desc.secure_version));
return sec_ver;
#else
return true;
#endif
@ -296,6 +304,8 @@ static void update_anti_rollback(const esp_partition_pos_t *partition)
esp_err_t err = bootloader_common_get_partition_description(partition, &app_desc);
if (err == ESP_OK) {
esp_efuse_update_secure_version(app_desc.secure_version);
} else {
ESP_LOGE(TAG, "Failed to get partition description %d", err);
}
}

12
components/efuse/src/esp_efuse_fields.c
View File

@ -12,6 +12,7 @@
#include "esp_types.h"
#include "assert.h"
#include "esp_err.h"
#include "esp_fault.h"
#include "esp_log.h"
#include "soc/efuse_periph.h"
#include "bootloader_random.h"
@ -45,7 +46,16 @@ uint32_t esp_efuse_read_secure_version(void)
bool esp_efuse_check_secure_version(uint32_t secure_version)
{
uint32_t sec_ver_hw = esp_efuse_read_secure_version();
return secure_version >= sec_ver_hw;
/* Additional copies for Anti FI check */
uint32_t sec_ver_hw_c1 = esp_efuse_read_secure_version();
uint32_t sec_ver_hw_c2 = esp_efuse_read_secure_version();
ESP_FAULT_ASSERT(sec_ver_hw == sec_ver_hw_c1);
ESP_FAULT_ASSERT(sec_ver_hw == sec_ver_hw_c2);
bool ret_status = (secure_version >= sec_ver_hw);
/* Anti FI check */
ESP_FAULT_ASSERT(ret_status == (secure_version >= sec_ver_hw));
return ret_status;
}
esp_err_t esp_efuse_update_secure_version(uint32_t secure_version)