ESP32 Signed App Verification

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  • March 8, 2019 at 12:56 #24147
    Andrzej.T
    Participant

    Hi,

    I have a problem with ESP32 Signed App Verification by Bootloader Without Hardware Secure Boot.
    I turn on:

    • Require signed app image
    • Bootloader verifies app signatures
    • Verify app signature on update
    • Sign binaries during build

    When I build, I getting error:

    FAILED: bootloader.elf 
cmd.exe /C "cd . && C:\SysGCC\esp32\opt\xtensa-esp32-elf\bin\xtensa-esp32-elf-gcc.exe   -nostdlib CMakeFiles/bootloader.elf.dir/dummy_main_src.c.obj  -o bootloader.elf  -Wl,--gc-sections -Wl,--cref -Wl,--Map=bootloader.map -Wl,--start-group soc/libsoc.a spi_flash/libspi_flash.a micro-ecc/libmicro-ecc.a bootloader_support/libbootloader_support.a log/liblog.a main/libmain.a -L C:/SysGCC/esp32/esp-idf/v3.2/components/bootloader/subproject/main -T esp32.bootloader.ld -L C:/SysGCC/esp32/esp-idf/v3.2/components/bootloader/subproject/main -T esp32.bootloader.rom.ld -L C:/SysGCC/esp32/esp-idf/v3.2/components/esp32/ld -T esp32.rom.ld -L C:/SysGCC/esp32/esp-idf/v3.2/components/esp32/ld -T esp32.rom.spiram_incompatible_fns.ld -L C:/SysGCC/esp32/esp-idf/v3.2/components/esp32/ld -T esp32.peripherals.ld -lgcc && cd ."
bootloader_support/libbootloader_support.a(secure_boot_signatures.c.obj)(0): error : undefined reference to `_binary_signature_verification_key_bin_end
bootloader_support/libbootloader_support.a(secure_boot_signatures.c.obj)(0): error : undefined reference to `_binary_signature_verification_key_bin_start
collect2.exe: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.

    Regards,

    Andrzej Tatar

    • This topic was modified 5 years, 8 months ago by support. Reason: formatting
    March 8, 2019 at 17:47 #24152
    support
    Keymaster

    Hi,

    This looks like an issue if the ESP-IDF itself. Please double-check with Espressif whether there is a fix for this.

    March 12, 2019 at 08:01 #24212
    Andrzej.T
    Participant

    Hi,

    I got answer from Espressif:

    “Unfortunately we haven’t finished Secure Boot support in CMake preview release yet.
    There’s a list of missing features here:https://docs.espressif.com/projects/esp … cmake.html
    This will be coming very soon, but for now if you switch back to GNU Make build system then it should build correctly.”

    Regards
    Andrzej Tatar

    March 12, 2019 at 08:46 #24213
    Andrzej.T
    Participant

    So, whether it will be possible to change of build system in my current project to Make?
    Or I have to create new project?

    Regards
    Andrzej Tatar

    March 13, 2019 at 06:10 #24225
    support
    Keymaster

    Thanks for the update. The easiest way to change the project to Make would be to re-import it via the VisualGDB IDF Project Wizard as a Make project.

    However, this will only work if your project directory has the build scripts for GNU Make (e.g. project.mk). If not, please try creating a new project and adding the source files to it via Add->Existing Items so that VisualGDB automatically updates the build scripts.

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