How to solve "certificate verify failed" on Windows?

Solution 1:

Actually the best way I found to solve this in windows for Ruby itself, not just one gem, is to do the following:

1. Download https://curl.haxx.se/ca/cacert.pem into c:\railsinstaller\cacert.pem. Make sure you save it as a .pem file, rather than a text file.
2. Go to your Computer -> Advanced Settings -> Environment Variables

3. Create a new System Variable:

   Variable: SSL_CERT_FILE Value: C:\RailsInstaller\cacert.pem

4. Close all your command prompts, including your Rails server command prompt, etc.

5. Start a new ruby irb prompt, and try the following:

   $irb>require 'open-uri'
   $irb>open('https://www.gmail.com')
   

It should all work now just fine.

Solution 2:

Solution for Windows, which I cobbled together from a few different answers:

1. Download https://curl.haxx.se/ca/cacert.pem and put it in YOUR_APP/lib/assets (or wherever)

2. In config/initializers/omniauth.rb:

    #config/initializers/omniauth.rb
   Rails.application.config.middleware.use OmniAuth::Builder do
     provider :facebook, CUSTOMER_KEY, CUSTOMER_SECRET, {client_options: {ssl: {ca_file: Rails.root.join('lib/assets/cacert.pem').to_s}}}
   end
   

3. Obviously, restart your server.

Footnotes: You might be able to cut out a lot of the unnecessary certificates in the cacert.pem file to reduce the size. If you only need this solution for development, you could save the file outside of your project and do a if Rails.env.development? _provider line with the client_options hash_ else _provider line without client_options hash_ end

Solution 3:

After too much searching and wasted time, I found a very simple solution to fix this issue in Ruby with Windows.

Two simple steps:

1. In command prompt write: C:\gem install certified

2. In your rb file add: require 'certified'

That's it.