faraday_ssl_cert_connection.rb

# Faraday customs method:

class FaradayHttp
  def with_openssl
    system "openssl pkcs12 -in my-certificate-path -out certificate-output-path -nodes -password pass:certificate-password"

    def cert_object
      OpenSSL::X509::Certificate.new File.read("certificate-output-path")
    end

    # create PKey
    def key_object
      OpenSSL::PKey.read File.read("certificate-output-path")
    end


    faraday = Faraday::Connection.new 'https://example-site.com',
    :ssl => {
      certificate: cert_object,
      private_key: key_object,
      version: :SSLv3,
      verify: false
    }
    faraday
  end
end

# Controller that try to connect with the ssl server:

agent = FaradayHttp.new.with_openssl
page = agent.get '/login_path'