50_NRF_keyfile Structure Request

[CloudAllowed]

Hey Folks!

Can anybody support me with an example of the 50_NRF_keyfile.
I am struggling with the correct format.

BR & many THX Matthis

[CloudAllowed]

My current keyfile has only one line/key:
h4xsf3xXXXqXeXXpXX2/Sx4+oci93KgXsXXnxX==

And I get this error message:

The key was not patched correctly!

merging application and softdevice... : nrf51822_xxac
mergehex -m _build/nrf51822_xxac.hex /home/matthis/nrf5x/nRF5_SDK_12.3.0_d7731ad/components/softdevice/s130/hex/s130_nrf51_2.0.1_softdevice.hex -o _build/nrf51822_xxac_s130.hex
Parsing input files.
Merging file "nrf51822_xxac.hex" into output.
Merging file "s130_nrf51_2.0.1_softdevice.hex" into output.
Storing merged file.
/home/matthis/.local/share/pipx/venvs/nrfutil/bin/hex2bin.py _build/nrf51822_xxac_s130.hex _build/nrf51822_xxac_s130.bin
Patching nrf51822_xxac
cp _build/nrf51822_xxac_s130.bin _build/nrf51822_xxac_s130_patched.bin
xxd -p -c 100000 /home/matthis/nrf5x/nrf51822/armgcc/1_NRF_Key | xxd -r -p | dd of=_build/nrf51822_xxac_s130_patched.bin skip=1 bs=1 seek=123292 conv=notrunc
81+0 records in
81+0 records out
81 bytes copied, 0.0010693 s, 75.8 kB/s
xxd -p -c 100000 _build/nrf51822_xxac_s130_patched.bin | grep -q 454e444f464b455953454e444f464b455953454e444f464b45595321 || (echo "The key was not patched correctly!"; exit 1)
"/home/matthis/nrf5x/gcc-arm-none-eabi-10.3-2021.10/bin/arm-none-eabi-objcopy" -I binary -O elf32-littlearm -B arm _build/nrf51822_xxac_s130_patched.bin _build/nrf51822_xxac_s130_patched.elf
flashing application and softdevice...␍
openocd -f openocd.cfg -c "init; halt; nrf51 mass_erase; program _build/nrf51822_xxac_s130_patched.bin verify; reset; exit";
Open On-Chip Debugger 0.12.0
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD
Info : clock speed 1000 kHz
Info : STLINK V2J29S7 (API v2) VID:PID 0483:3748
Info : Target voltage: 3.305418
Info : [nrf51822.cpu] Cortex-M0 r0p0 processor detected
Info : [nrf51822.cpu] target has 4 breakpoints, 2 watchpoints
Info : starting gdb server for nrf51822.cpu on 3333
Info : Listening on port 3333 for gdb connections
[nrf51822.cpu] halted due to debug-request, current mode: Thread
xPSR: 0x61000000 pc: 0x00011434 msp: 0x20003fc8
Info : nRF51822-QFAA(build code: H0) 256kB Flash, 16kB RAM
Info : Mass erase completed.
Info : A reset or power cycle is required if the flash was protected before.
[nrf51822.cpu] halted due to debug-request, current mode: Thread
xPSR: 0xc1000000 pc: 0xfffffffe msp: 0xfffffffc
** Programming Started **
Warn : Adding extra erase range, 0x0001ea5c .. 0x0001ebff
** Programming Finished **
** Verify Started **
** Verified OK **

[pix]

You need to use the generate_keys.py script in tools.

python generate_keys.py -n 50 -p 50_NRF

File structure is:

[8 bit key count (ignored)][key0 in binary][...][keyN in binary]

[CloudAllowed]

Same issue with the key generated in this way. Same error messages.

Parhaps an issue with old or wrong libraries. I will setup the environment again blank from the scretch.
Will share my results here. THX.

You need to use the generate_keys.py script in tools.

python generate_keys.py -n 50 -p 50_NRF

File structure is:

[8 bit key count (ignored)][key0 in binary][...][keyN in binary]

[pix]

The keyfile should not contain base64.

More so:

81+0 records in
81+0 records out

These should be multiple of 28.

Are you sure you picked the file ending in _keyfile ?

[CloudAllowed]

I'm on vacation the next couple of days.
I'll give it a try after my return.
Many thanks!