ESP32 Signed App Verification

[Andrzej.T]

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

[support]

Hi,

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

[Andrzej.T]

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

[Andrzej.T]

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

[support]

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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