CMakeLists.txt

# CMakeLists.txt for building mcuboot as a Zephyr project
#
# Copyright (c) 2017 Open Source Foundries Limited
#
# SPDX-License-Identifier: Apache-2.0

cmake_minimum_required(VERSION 3.13.1)

# Add a common dts overlay necessary to ensure mcuboot is linked into,
# and fits inside, the boot partition. (If the user specified a
# DTC_OVERLAY_FILE on the CMake command line, we need to append onto
# the list).
if(DTC_OVERLAY_FILE)
  set(DTC_OVERLAY_FILE
    "${DTC_OVERLAY_FILE} ${CMAKE_CURRENT_LIST_DIR}/dts.overlay"
    CACHE STRING "" FORCE
    )
else()
  set(DTC_OVERLAY_FILE ${CMAKE_CURRENT_LIST_DIR}/dts.overlay)
endif()

# Enable Zephyr runner options which request mass erase if so
# configured.
#
# Note that this also disables the default "leave" option when
# targeting STM32 DfuSe devices with dfu-util, making the chip stay in
# the bootloader after flashing.
#
# That's the right thing, because mcuboot has nothing to do since the
# chip was just erased. The next thing the user is going to want to do
# is flash the application. (Developers can reset DfuSE devices
# manually to test mcuboot behavior on an otherwise erased flash
# device.)
macro(app_set_runner_args)
  if(CONFIG_ZEPHYR_TRY_MASS_ERASE)
    board_runner_args(dfu-util "--dfuse-modifiers=force:mass-erase")
    board_runner_args(pyocd "--flash-opt=-e=chip")
    board_runner_args(nrfjprog "--erase")
  endif()
endmacro()

# nRF Connect SDK application boilerplate, needed for out-of-tree Nordic boards.
include($ENV{ZEPHYR_BASE}/../nrf/cmake/boilerplate.cmake NO_POLICY_SCOPE)

# Standard Zephyr application boilerplate:
# http://docs.zephyrproject.org/application/application.html
include($ENV{ZEPHYR_BASE}/cmake/app/boilerplate.cmake NO_POLICY_SCOPE)
project(NONE)

# Path to "boot" subdirectory of repository root.
get_filename_component(BOOT_DIR ${APPLICATION_SOURCE_DIR} DIRECTORY)
# Path to top-level repository root directory.
get_filename_component(MCUBOOT_DIR ${BOOT_DIR} DIRECTORY)
# Path to tinycrypt library source subdirectory of MCUBOOT_DIR.
set(TINYCRYPT_DIR "${MCUBOOT_DIR}/ext/tinycrypt/lib")
assert_exists(TINYCRYPT_DIR)
# Path to crypto-fiat
set(FIAT_DIR "${MCUBOOT_DIR}/ext/fiat")
assert_exists(FIAT_DIR)
# Path to mbed-tls' asn1 parser library.
set(MBEDTLS_ASN1_DIR "${MCUBOOT_DIR}/ext/mbedtls-asn1")
assert_exists(MBEDTLS_ASN1_DIR)
set(NRF_DIR "${MCUBOOT_DIR}/ext/nrf")

if(CONFIG_BOOT_USE_NRF_CC310_BL)
set(NRFXLIB_DIR $ENV{ZEPHYR_BASE}/../nrfxlib)
assert_exists(NRFXLIB_DIR)
endif()

zephyr_library_include_directories(
  include
  targets
  )
if(EXISTS targets/${BOARD}.h)
  zephyr_library_compile_definitions(MCUBOOT_TARGET_CONFIG="${BOARD}.h")
endif()

# Zephyr port-specific sources.
zephyr_library_sources(
  main.c
  flash_map_extended.c
  os.c
  keys.c
  )

if(NOT DEFINED CONFIG_FLASH_PAGE_LAYOUT)
  zephyr_library_sources(
    flash_map_legacy.c
    )
endif()

# Generic bootutil sources and includes.
zephyr_library_include_directories(${BOOT_DIR}/bootutil/include)
zephyr_library_sources(
  ${BOOT_DIR}/bootutil/src/loader.c
  ${BOOT_DIR}/bootutil/src/swap_misc.c
  ${BOOT_DIR}/bootutil/src/swap_scratch.c
  ${BOOT_DIR}/bootutil/src/swap_move.c
  ${BOOT_DIR}/bootutil/src/bootutil_misc.c
  ${BOOT_DIR}/bootutil/src/image_validate.c
  ${BOOT_DIR}/bootutil/src/encrypted.c
  ${BOOT_DIR}/bootutil/src/image_rsa.c
  ${BOOT_DIR}/bootutil/src/image_ec256.c
  ${BOOT_DIR}/bootutil/src/image_ed25519.c
  ${BOOT_DIR}/bootutil/src/caps.c
  ${BOOT_DIR}/bootutil/src/tlv.c
  )

if(CONFIG_BOOT_SIGNATURE_TYPE_ECDSA_P256 OR CONFIG_BOOT_ENCRYPT_EC256)
  zephyr_library_include_directories(
    ${MBEDTLS_ASN1_DIR}/include
    )
  zephyr_library_sources(
    # Additionally pull in just the ASN.1 parser from mbedTLS.
    ${MBEDTLS_ASN1_DIR}/src/asn1parse.c
    ${MBEDTLS_ASN1_DIR}/src/platform_util.c
    )
  if(CONFIG_BOOT_USE_TINYCRYPT)
  # When using ECDSA signatures, pull in our copy of the tinycrypt library.
  zephyr_library_include_directories(
    ${BOOT_DIR}/zephyr/include
    ${TINYCRYPT_DIR}/include
    )

  zephyr_library_sources(
    ${TINYCRYPT_DIR}/source/ecc.c
    ${TINYCRYPT_DIR}/source/ecc_dsa.c
    ${TINYCRYPT_DIR}/source/sha256.c
    ${TINYCRYPT_DIR}/source/utils.c
    )
  elseif(CONFIG_BOOT_USE_NRF_CC310_BL)
    zephyr_library_sources(${NRF_DIR}/cc310_glue.c)
    zephyr_library_include_directories(${NRF_DIR})
    zephyr_link_libraries(nrfxlib_crypto)
  elseif(CONFIG_BOOT_USE_NRF_EXTERNAL_CRYPTO)
    zephyr_include_directories(${BL_CRYPTO_DIR}/../include)
  endif()

  # Since here we are not using Zephyr's mbedTLS but rather our own, we need
  # to set MBEDTLS_CONFIG_FILE ourselves. When using Zephyr's copy, this
  # variable is set by its Kconfig in the Zephyr codebase.
  zephyr_library_compile_definitions(
    MBEDTLS_CONFIG_FILE="${CMAKE_CURRENT_LIST_DIR}/include/mcuboot-mbedtls-cfg.h"
    )
elseif(CONFIG_BOOT_SIGNATURE_TYPE_RSA)
  # Use mbedTLS provided by Zephyr for RSA signatures. (Its config file
  # is set using Kconfig.)
  zephyr_include_directories(include)
elseif(CONFIG_BOOT_SIGNATURE_TYPE_ED25519)
  # For ed25519, mbedTLS is used for ASN1 parsing and SHA512
  zephyr_include_directories(include)

  zephyr_library_include_directories(
    ${BOOT_DIR}/zephyr/include
    ${FIAT_DIR}/include/
  )

  zephyr_library_sources(
    ${FIAT_DIR}/src/curve25519.c
  )
endif()

if(CONFIG_BOOT_ENCRYPT_EC256)
  zephyr_library_sources(
    ${TINYCRYPT_DIR}/source/aes_encrypt.c
    ${TINYCRYPT_DIR}/source/aes_decrypt.c
    ${TINYCRYPT_DIR}/source/ctr_mode.c
    ${TINYCRYPT_DIR}/source/hmac.c
    ${TINYCRYPT_DIR}/source/ecc_dh.c
    )
endif()

if(CONFIG_MCUBOOT_SERIAL)
  zephyr_sources(${BOOT_DIR}/zephyr/serial_adapter.c)
  zephyr_sources(${BOOT_DIR}/boot_serial/src/boot_serial.c)

  zephyr_include_directories(${BOOT_DIR}/bootutil/include)
  zephyr_include_directories(${BOOT_DIR}/boot_serial/include)
  zephyr_include_directories(include)

  zephyr_link_libraries_ifdef(
    CONFIG_TINYCBOR
    TINYCBOR
    )

  zephyr_include_directories_ifdef(
    CONFIG_BOOT_ERASE_PROGRESSIVELY
    ${BOOT_DIR}/bootutil/src
    )
endif()

if(NOT CONFIG_BOOT_SIGNATURE_KEY_FILE STREQUAL "")
  if(IS_ABSOLUTE ${CONFIG_BOOT_SIGNATURE_KEY_FILE})
    set(KEY_FILE ${CONFIG_BOOT_SIGNATURE_KEY_FILE})
  else()
    set(KEY_FILE ${MCUBOOT_DIR}/${CONFIG_BOOT_SIGNATURE_KEY_FILE})
  endif()

  set_property(
	GLOBAL
	PROPERTY
	KEY_FILE
	${KEY_FILE}
	)

  set(GENERATED_PUBKEY ${ZEPHYR_BINARY_DIR}/autogen-pubkey.c)
  add_custom_command(
    OUTPUT ${GENERATED_PUBKEY}
    COMMAND
    ${PYTHON_EXECUTABLE}
    ${MCUBOOT_DIR}/scripts/imgtool.py
    getpub
    -k
    ${KEY_FILE}
    > ${GENERATED_PUBKEY}
    DEPENDS ${KEY_FILE}
    )
  zephyr_library_sources(${GENERATED_PUBKEY})
endif()