dananjayavr / cyclone_crypto_rsa_sha_signature Goto Github PK

• CMake (project built/tested using CMake 3.23.3)
• Linux distro (project built/tested on Ubuntu 20.04 LTS on Windows Subsystem for Linux (WSL2))

• main.c : main entrypoint
• check_probable_prime.c : reference implmentation, please see the note below
• lib/common : common files for CycloneCRYPTO (Open)
• lib/core : core files for CycloneCRYPTO (Open)
• lib/cyclone_crypto : complete source code for CycloneCRYPTO (Open)
• lib/crypto_config.h : used to enable/disable different CRYPTO modules
• lib/os_port_config.h : contains information about the target platform

• create a 'build' directory at the project root.
• From within 'build' directory, execute the following commands:
  • cmake ..
  • cmake --build .
• ./rsa_sha_demo will run the demo.

• Activate with the macro definition USE_OPENSSL_KEYS 1 (and USE_CYCLONE_KEYS 0)
• Generate keypair at the root folder (the program assumes execution from ./build folder)
• Private key : openssl genrsa -out my_rsa_key.pem 2048
• Public Key : openssl rsa -in my_rsa_key.pem -outform PEM -pubout -out my_rsa_public.key
• Build the demo using the steps in the previous step.

The file check_probable_prime.c is an example imlpementation of checkProbablePrime(), based on some mbedTLS routines (under Apache 2.0 permissive license). This is not a part of CycloneCRYPTO.

CycloneCRYPTO is mainly oriented towards smaller footprint embedded targets. On such devices the computing cost for calculating a RSA keypair with a software implementation is quite large (~2 minutes). The funciton checkProbablePrime() is provided as a placeholder, so code running on embedded targets (SAMExx, Renesas RA6, etc.) can use hardware acceleration usually provided by MCU vendors.

However, this is not a big issue for a project running on a x86 based target (ex.Intel).

This folder contains all the files/folders available for CycloneCRYPTO suite. Naturally, not all files/folders are used for this demo. lib/CMakeLists.txt contains a list of dependencies for the current project.

CycloneCRYPTO is able to import keypairs generated by OpenSSL as long as they conform to the following criteria: - keys are in PEM format - No passphrases are used to protect the keys