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Add flags to enable secure boot and secure boot lock via firmware on boot.

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Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
This commit is contained in:
Pol Henarejos 2024-11-04 18:31:34 +01:00
parent 6f7d92a591
commit 802df9e705
No known key found for this signature in database
GPG key ID: C0095B7870A4CCD3
2 changed files with 68 additions and 0 deletions
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22
pico_keys_sdk_import.cmake
View file

@ -113,6 +113,28 @@ endif()
message(STATUS "USB VID/PID:\t\t\t ${USB_VID}:${USB_PID}")
option(ENABLE_SECURE_BOOT_FIRMWARE "Enable Secure Boot through the firmware" OFF)
if(ENABLE_SECURE_BOOT_FIRMWARE)
add_definitions(-DENABLE_SECURE_BOOT_FIRMWARE)
message(STATUS "Secure boot firmware:\t enabled")
option(SECURE_BOOT_BOOTKEY_INDEX "Enable Secure Boot through the firmware" OFF)
if(SECURE_BOOT_BOOTKEY_INDEX)
add_definitions(-DSECURE_BOOT_BOOTKEY_INDEX=${SECURE_BOOT_BOOTKEY_INDEX})
message(STATUS "Secure boot bootkey index:\t ${SECURE_BOOT_BOOTKEY_INDEX}")
endif(SECURE_BOOT_BOOTKEY_INDEX)
option(ENABLE_SECURE_BOOT_LOCK_FIRMWARE "Enable Secure Boot Lock through the firmware" OFF)
if(ENABLE_SECURE_BOOT_LOCK_FIRMWARE)
add_definitions(-DENABLE_SECURE_BOOT_LOCK_FIRMWARE)
message(STATUS "Secure boot lock firmware:\t enabled")
else()
message(STATUS "Secure boot lock firmware:\t disabled")
endif(ENABLE_SECURE_BOOT_LOCK_FIRMWARE)
else()
message(STATUS "Secure boot firmware:\t disabled")
endif(ENABLE_SECURE_BOOT_FIRMWARE)
set(MBEDTLS_SOURCES
${CMAKE_CURRENT_LIST_DIR}/mbedtls/library/aes.c
${CMAKE_CURRENT_LIST_DIR}/mbedtls/library/asn1parse.c

46
src/fs/otp.c
View file

@ -116,6 +116,52 @@ void init_otp_files() {
otp_key_1 = otp_buffer(OTP_KEY_1);
otp_lock_page(page);
#ifdef ENABLE_SECURE_BOOT_FIRMWARE
uint8_t BOOTKEY[] = "\xe1\xd1\x6b\xa7\x64\xab\xd7\x12\xd4\xef\x6e\x3e\xdd\x74\x4e\xd5\x63\x8c\x26\xb\x77\x1c\xf9\x81\x51\x11\xb\xaf\xac\x9b\xc8\x71";
#ifndef SECURE_BOOT_BOOTKEY_INDEX
#define SECURE_BOOT_BOOTKEY_INDEX 0
#endif
if (is_empty_otp_buffer(OTP_DATA_BOOTKEY0_0_ROW + 0x10*SECURE_BOOT_BOOTKEY_INDEX, 32)) {
otp_write_data(OTP_DATA_BOOTKEY0_0_ROW + 0x10*SECURE_BOOT_BOOTKEY_INDEX, BOOTKEY, sizeof(BOOTKEY));
}
uint8_t *boot_flags1 = otp_buffer_raw(OTP_DATA_BOOT_FLAGS1_ROW);
uint8_t flagsb1[] = { boot_flags1[0] | (1 << (SECURE_BOOT_BOOTKEY_INDEX + OTP_DATA_BOOT_FLAGS1_KEY_VALID_LSB)), boot_flags1[1], boot_flags1[2], 0x00 };
#ifdef ENABLE_SECURE_BOOT_LOCK_FIRMWARE
flagsb1[1] |= ((OTP_DATA_BOOT_FLAGS1_KEY_INVALID_BITS >> OTP_DATA_BOOT_FLAGS1_KEY_INVALID_LSB) & (~(1 << SECURE_BOOT_BOOTKEY_INDEX)));
#endif
otp_write_data_raw(OTP_DATA_BOOT_FLAGS1_ROW, flagsb1, sizeof(flagsb1));
otp_write_data_raw(OTP_DATA_BOOT_FLAGS1_R1_ROW, flagsb1, sizeof(flagsb1));
otp_write_data_raw(OTP_DATA_BOOT_FLAGS1_R2_ROW, flagsb1, sizeof(flagsb1));
uint8_t *crit1 = otp_buffer_raw(OTP_DATA_CRIT1_ROW);
uint8_t flagsc1[] = { crit1[0] | (1 << OTP_DATA_CRIT1_SECURE_BOOT_ENABLE_LSB), crit1[1], crit1[2], 0x00 };
#ifdef ENABLE_SECURE_BOOT_LOCK_FIRMWARE
flagsc1[0] |= (1 << OTP_DATA_CRIT1_DEBUG_DISABLE_LSB);
flagsc1[0] |= (1 << OTP_DATA_CRIT1_GLITCH_DETECTOR_ENABLE_LSB);
flagsc1[0] |= (3 << OTP_DATA_CRIT1_GLITCH_DETECTOR_SENS_LSB);
#endif
otp_write_data_raw(OTP_DATA_CRIT1_ROW, flagsc1, sizeof(flagsc1));
otp_write_data_raw(OTP_DATA_CRIT1_R1_ROW, flagsc1, sizeof(flagsc1));
otp_write_data_raw(OTP_DATA_CRIT1_R2_ROW, flagsc1, sizeof(flagsc1));
otp_write_data_raw(OTP_DATA_CRIT1_R3_ROW, flagsc1, sizeof(flagsc1));
otp_write_data_raw(OTP_DATA_CRIT1_R4_ROW, flagsc1, sizeof(flagsc1));
otp_write_data_raw(OTP_DATA_CRIT1_R5_ROW, flagsc1, sizeof(flagsc1));
otp_write_data_raw(OTP_DATA_CRIT1_R6_ROW, flagsc1, sizeof(flagsc1));
otp_write_data_raw(OTP_DATA_CRIT1_R7_ROW, flagsc1, sizeof(flagsc1));
#ifdef ENABLE_SECURE_BOOT_LOCK_FIRMWARE
uint8_t *page1 = otp_buffer_raw(OTP_DATA_PAGE1_LOCK1_ROW);
uint8_t page1v = page1[0] | (OTP_DATA_PAGE1_LOCK1_LOCK_BL_VALUE_READ_ONLY << OTP_DATA_PAGE1_LOCK1_LOCK_BL_LSB);
uint8_t flagsp1[] = { page1v, page1v, page1v, 0x00 };
otp_write_data_raw(OTP_DATA_PAGE1_LOCK1_ROW, flagsp1, sizeof(flagsp1));
uint8_t *page2 = otp_buffer_raw(OTP_DATA_PAGE2_LOCK1_ROW);
uint8_t page2v = page2[0] | (OTP_DATA_PAGE2_LOCK1_LOCK_BL_VALUE_READ_ONLY << OTP_DATA_PAGE2_LOCK1_LOCK_BL_LSB);
uint8_t flagsp2[] = { page2v, page2v, page2v, 0x00 };
otp_write_data_raw(OTP_DATA_PAGE2_LOCK1_ROW, flagsp2, sizeof(flagsp2));
#endif
#endif
#elif defined(ESP_PLATFORM)
if (esp_efuse_key_block_unused(OTP_KEY_1)) {