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fix(esp_security): Configure the Key Manager to use XTS-AES efuse key by-default

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harshal.patil
2025-09-19 10:13:52 +05:30
parent 649741fa9d
commit 8b663ebe4d
2 changed files with 28 additions and 7 deletions
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25
components/esp_security/src/init.c
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@@ -20,6 +20,7 @@
#if SOC_KEY_MANAGER_SUPPORT_KEY_DEPLOYMENT
#include "hal/key_mgr_ll.h"
#include "hal/key_mgr_types.h"
#endif /* SOC_KEY_MANAGER_SUPPORT_KEY_DEPLOYMENT */
__attribute__((unused)) static const char *TAG = "esp_security";
@@ -27,14 +28,24 @@ __attribute__((unused)) static const char *TAG = "esp_security";
static void esp_key_mgr_init(void)
{
// The following code initializes the key manager.
// When Flash Encryption is already enabled, Key Manager is initialized by the
// ROM, and when Flash Encryption is enabled during boot up, Key Manager is
// initialized by the bootloader.
#if SOC_KEY_MANAGER_SUPPORT_KEY_DEPLOYMENT
// Enable key manager clock
// Using ll APIs which do not require critical section
_key_mgr_ll_enable_bus_clock(true);
_key_mgr_ll_enable_peripheral_clock(true);
_key_mgr_ll_reset_register();
while (key_mgr_ll_get_state() != ESP_KEY_MGR_STATE_IDLE) {
};
if (!efuse_hal_flash_encryption_enabled()) {
// Enable key manager clock
key_mgr_ll_power_up();
// Using ll APIs which do not require critical section
_key_mgr_ll_enable_bus_clock(true);
_key_mgr_ll_enable_peripheral_clock(true);
_key_mgr_ll_reset_register();
while (key_mgr_ll_get_state() != ESP_KEY_MGR_STATE_IDLE) {
};
// Force Key Manager to use eFuse key by-default for an XTS-AES operation.
key_mgr_ll_set_key_usage(ESP_KEY_MGR_XTS_AES_128_KEY, ESP_KEY_MGR_USE_EFUSE_KEY);
}
#endif /* SOC_KEY_MANAGER_SUPPORT_KEY_DEPLOYMENT */
}

10
components/hal/esp32p4/include/hal/key_mgr_ll.h
View File

@@ -25,6 +25,16 @@
extern "C" {
#endif
static inline void key_mgr_ll_power_up(void)
{
// TODO: IDF-13524
}
static inline void key_mgr_ll_power_down(void)
{
// TODO: IDF-13524
}
/**
* @brief Enable the bus clock for Key Manager peripheral
* Note: Please use key_mgr_ll_enable_bus_clock which requires the critical section