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To have confidence this source code tree is the same as the binary on your device, you can rebuild it from source and get exactly the same bytes. This process has been automated using Docker. Steps are as follows:
Install Docker and start it.
Install make (GNUMake) if you don't already have it.
Checkout the code, and start the process.
git clone https://github.com/Coldcard/firmware.git cd firmware/stm32 make repro
At the end of the process a clear confirmation message is shown, or the differences.
Build products can be found
Check-out and Setup
Do a checkout, recursively to get all the submodules:
git clone --recursive https://github.com/Coldcard/firmware.git
Already checked-out and getting git errors? Do this:
git fetch git reset --hard origin/master
git submodule update --init(if needed?)
brew install autogen
virtualenv -p python3 ENV(Python > 3.5 is required)
source ENV/bin/activate.cshbased on shell preference)
pip install -r requirements.txt
Setup and Run the Desktop-based Coldcard simulator:
cd unix; make setup && make; ./simulator.py
Building the firmware:
cd ../cli; pip install --editable .
cd ../stm32; make setup && make; make firmware-signed.dfu
- The resulting file,
firmware-signed.dfucan be loaded directly onto a Coldcard, using this command (already installed based on above)
ckcc upgrade firmware-signed.dfu
Which looks like this:
[ENV] [firmware/stm32 42] ckcc upgrade firmware-signed.dfu 675328 bytes (start @ 293) to send from 'firmware-signed.dfu' Uploading [##########--------------------------] 29% 0d 00:01:04
You'll probably need to install at least these packages:
brew install --cask xquartz brew install sdl2 xterm brew install --cask gcc-arm-embedded
Used to be these were needed as well:
brew tap PX4/px4 brew search px4 brew install px4/px4/gcc-arm-none-eabi-80 (latest gcc-arm-none-eabi-XX, currently 80)
You may need to reboot to avoid a
DISPLAY is not set error.
You'll probably need to install these (Ubuntu 16):
apt install libudev-dev python-sdl2 gcc-arm-none-eabi
If you get stuck on the "Skip PIN" screen after the startup, edit the
pyb.py file located under
/unix/frozen-modules/ and follow the instructions from line 27 to line 31:
# If on linux, try commenting the following line addr = bytes([len(fn)+2, socket.AF_UNIX] + list(fn)) # If on linux, try uncommenting the following two lines #import struct #addr = struct.pack('H108s', socket.AF_UNIX, fn)
- shared code between desktop test version and real-deal
- expected to be largely in python, and higher-level
- unix (MacOS) version for testing/rapid dev
- this is a simulator for the product
- test cases and associated data
- embedded micro version, for actual product
- final target is a binary file for loading onto hardware
- code from other projects, ie. the dreaded submodules
- 32k of factory-set code that you cannot change
- however, you can inspect what code is on your coldcard and compare to this.
- schematic and bill of materials for the Coldcard
- files on "simulated" microSD card
Found a bug? Email: email@example.com