cert-store-check.rb

require 'openssl'
require 'socket'

ssl_context = OpenSSL::SSL::SSLContext.new
ssl_context.verify_mode = OpenSSL::SSL::VERIFY_PEER
ssl_context.cert_store = OpenSSL::X509::Store.new
ssl_context.cert_store.set_default_paths if File.exists? OpenSSL::Config::DEFAULT_CONFIG_FILE

socket = TCPSocket.new('api.gb1.brightbox.com', 443)
ssl_socket = OpenSSL::SSL::SSLSocket.new(socket, ssl_context)
ssl_socket.connect