OmniAuth strategy for authenticating against the Yubico API with a Yubikey OTP.

To Do

• More RSpec coverage
• Verify the hash returned by Yubico
• Use Faraday
• Require valid SSL certificate

Contains portions of code from:

ruby-yubico by Jenecai 'Seven' Corvina seven@ofhearts.org http://code.google.com/p/ruby-yubico/ BSD license

yubikey by Jonathan Rudenberg jon335@gmail.com https://github.com/titanous/yubikey MIT license