MCUBoot with serial UART and image encryption

[rdolejs]

I am working on a development with a nRF52840-DK development board and I am trying to enable image encryption with MCUboot. I followed the case advice given in "nRF52840 + NCS + MCUBoot, CC310-enabled image encryption?" since it appeared to be working. However I also have the UART serial port enabled and that appears to be generating a compile error as shown below.

C:\nordicsemi\v2.0.0\bootloader\mcuboot\boot\boot_serial\src\boot_serial.c:476: undefined reference to `boot_handle_enc_fw'
collect2.exe: error: ld returned 1 exit status

The .conf files are shown below.

prj.conf file:

CONFIG_GPIO=y
CONFIG_BOOTLOADER_MCUBOOT=y

mcuboot.conf file:

CONFIG_SIZE_OPTIMIZATIONS=y

CONFIG_PM_PARTITION_SIZE_MCUBOOT=0x10000

CONFIG_UART_CONSOLE=n
CONFIG_MCUBOOT_SERIAL=y
CONFIG_BOOT_SERIAL_UART=y

CONFIG_BOOT_SIGNATURE_TYPE_ECDSA_P256=y
CONFIG_BOOT_SIGNATURE_KEY_FILE="C:/Workspace/VScode/wren_blinky/child_image/keys/mcuboot_private_sign.pem"

CONFIG_BOOT_ENCRYPT_EC256=y
CONFIG_BOOT_ENCRYPTION_KEY_FILE="C:/Workspace/VScode/wren_blinky/child_image/keys/mcuboot_private_enc.pem"

CONFIG_BOOT_ECDSA_TINYCRYPT=y

Bootloading with mcumger works with the signature enabled. However, adding the CONFIG_BOOT_ENCRYPT_EC256=y line causes the undefined reference to boot_handle_enc_fw error to be generated. Any ideas why I am getting this compile error?

Best regards,

Ray

[Amanda Hsieh]

Hi, 

As my colleague Virda said in that post, Encrypted DFU is feature we do not officially support in our SDK. You could edit the CMakeLists.txt as Virda indicated in the thread. 

Regards,
Amanda