rsa: add rsa digital signature function #14

	name: c-crypsi CI

	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	jobs:
	build:

	runs-on: ubuntu-20.04

	strategy:
	fail-fast: false

	steps:
	- uses: actions/checkout@v2
	- name: Set permission to install_ubuntu_deps
	run: chmod +x ./scripts/install_ubuntu_deps
	- name: Install Ubuntu dependecies
	run: bash ./scripts/install_ubuntu_deps
	- name: Check Builder
	run: \|
	cmake --version
	gcc --version
	openssl version -a
	- name: Build Example
	run: make build
	- name: Run example
	run: ./app

Provide feedback