Installing project platformio-core CLI

torodd.lonning · November 22, 2023, 7:06am

Im trying to install this prjoject from here:

StarGate01/ykhmac-uchost/blob/master/README.md

# ykhmac-uchost

Yubikey **HMAC-SHA1 challenge-response** authentication via **NFC** for embedded host systems.

[Blog post for more details](https://chrz.de/2021/12/22/nfc-hacking-part-1-authentication-systems-security/).

Tested target hardware:
 - [Yubikey 5 NFC](https://www.yubico.com/de/product/yubikey-5-nfc/) version 5.4.3
 - Yubikey 5 NFC version 5.2.6
 - [Fidesmo card 2.0](https://shop.fidesmo.com/products/fidesmo-card-2-0) running [vk-ykhmac](https://github.com/StarGate01/vk-ykhmac)
 - [Generic NXP P71](https://www.nxp.com/products/security-and-authentication/security-controllers/smartmx3-p71d321-secure-and-flexible-microcontroller:SMARTMX3-P71D321) running vk-ykhmac

Tested host hardware:
 - [Arduino Uno](https://store.arduino.cc/products/arduino-uno-rev3/) R3

### Development

Download [Visual Studio Code](https://code.visualstudio.com/) and [PlatformIO](https://platformio.org/) to load and compile this project. The example code is configured to build for Arduino.

### Standalone library

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Im new to arduino and platformIO, I think i have followed the steps. Im getting this error when im pasting “pio pkg install --library “stargate01/ykhmac”” innto the “platformIO core CLI”,

“Resolving uno dependencies…
Library Manager: Installing stargate01/ykhmac @ ^0.0.1
UnknownPackageError: Could not find the package with ‘stargate01/ykhmac @ ^0.0.1’ requirements for your system ‘windows_amd64’”

and under problem it says
main.cpp "
“message”: “unused variable ‘result’ [-Wunused-variable]”,

cant upload more pictures because of new user restrictions, i can take more pictures

divstar · November 22, 2023, 3:39pm

Hello and welcome to PlatformIO. Can you please post the whole error message along with the class or file (apparently main.cpp?) and code it refers to?

Usually “unused variable” is just a warning and while you shouldn’t introduce variables you don’t use, they shouldn’t make or break a build.

Also I assume that if it’s in main.cpp, it’s the main entry point for your application and not from a library or something.

maxgerhardt · November 22, 2023, 6:23pm

There is no such version listed. All of these versions seem very broken and non-semver formaty. I think what you want is to just download the project (recursively) and copy all library folders into your project at the same place.

torodd.lonning · November 22, 2023, 8:50pm

I did this, but the folders seems to be empty. However if I go to “D:\platform Io\hmac.pio\libdeps\myenv” the folders are not empty

maybe i can copy content from
D:\platform Io\hmac.pio\libdeps\myenv\cryptosuite2
D:\platform Io\hmac.pio\libdeps\myenv\tiny-AES-c
to the empty folders:
D:\platform Io\hmac\lib\cryptosuite2
D:\platform Io\hmac\lib\tiny-AES-c

to be able to include
#include “ykhmac.h”

#include <sha/sha1.h>

#include <aes.hpp>

into
D:\platform Io\hmac\lib\ykhmac\src\ykhmac.cpp
and
D:\platform Io\hmac\lib\ykhmac\include\ykhmac.h

torodd.lonning · November 23, 2023, 5:54am

I think i have the project set up correctly now, but im new to arduino and platformio. I cant find where the arduino pins are selected. I have this setup

when you go here and select helpers.cpp, aparently your supposed to be able to just upload helpers.cpp to your arduino and it should work. I see “helpers.cpp” includes “helpers.h” and “helpers.h” includes “ykhmac.h” and “ykhmac.h” includes “aes.h”, so technically I do not need the cryptosuite2 library where the “sha1.h” and “config.h” is located? Either way, non of these contain any selection of arduino pins? but the nfc reader pn532, i think it is called, is supposed to use the spi port, maybe it finds it on its own if it is connected to the spi port? what about the sda, scl, rsto and iro on the same nfc reader pn532?

github.com

StarGate01/ykhmac-uchost/blob/master/src/helpers.cpp

/**
 * @file helpers.cpp
 * @author Christoph Honal
 * @brief Implements the functionality defined in helpers.h, as well as functions required by the ykhmac library
 * @version 0.1
 * @date 2021-12-17
 */

#include <EEPROM.h>
#include <Adafruit_PN532.h>

#include "helpers.h"


// Prints a byte array to the serial output
void print_array(const uint8_t* data, const size_t size)
{
    char hxdig[4] = {0};
    for (size_t i = 0; i < size; i++)
    {

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src/helpers.cpp

torodd.lonning · November 23, 2023, 7:23am

I guess this is where the pins are set, in the adafrute_pn532, the 0 seems to be manipulated, portmanipulated for better efficiency?

Pin one is also used, but i cant see where this pin is set, but it is clearly connected to the RSTO on the pn532 nfc reader.

divstar · November 29, 2023, 2:26am

Sorry, but without knowing the code (or preferably: having written the code myself), I have no idea where to look for the pin IDs / pins.

What you showed, looks like the default constants for pins, but I’d try reading the docs for the libraries and the project, that you use. I’d guess, that the actual pins are either set on setup or before that (in a constructor or something).

I know this is tedious, but sometimes you either resort to trying it out yourself or to reading and looking for e.g. issues or information on GitHub and/or here etc. and trying to figure out what is what.