Add key pair generator

lib/rsa_authority.rb

@@ -1,4 +1,10 @@
+require 'openssl'
+require 'base64'
+require 'cgi'
+
 require "rsa_authority/version"
+require "rsa_authority/key_gen"
+
 
 module RSAAuthority
   # Your code goes here...

lib/rsa_authority/key_gen.rb

@@ -0,0 +1,11 @@
+module RSAAuthority
+  class KeyGen
+    def self.generate(key_name)
+      rsa_private_key = OpenSSL::PKey::RSA.generate(2048)
+
+      File.open("#{key_name}.pem", "w") { |io|  io.write(rsa_private_key.to_s)  }
+
+      File.open("#{key_name}.pub", "w") { |io|  io.write(rsa_private_key.public_key)  }
+    end
+  end
+end

spec/key_gen_spec.rb

@@ -0,0 +1,16 @@
+require 'spec_helper'
+
+describe RSAAuthority::KeyGen do
+  let(:test_key_name) { 'example_key' }
+  let(:public_key) { "#{test_key_name}.pub" }
+  let(:private_key) { "#{test_key_name}.pem" }
+
+  after { File.delete public_key, private_key }
+
+  it "generates public and privete key pair" do
+    RSAAuthority::KeyGen.generate(test_key_name)
+
+    expect(File.exists?(public_key)).to be(true)
+    expect(File.exists?(private_key)).to be(true)
+  end
+end

spec/spec_helper.rb

@@ -1,3 +1,7 @@
+$LOAD_PATH.unshift(File.join(File.dirname(__FILE__), '..', 'lib'))
+
+require 'rsa_authority'
+
 # This file was generated by the `rspec --init` command. Conventionally, all
 # specs live under a `spec` directory, which RSpec adds to the `$LOAD_PATH`.
 # The generated `.rspec` file contains `--require spec_helper` which will cause this