A simple class to work with Google Authenticator from ruby. Can generate a secret key along with qrcode url/image and generate one time passwords for a secret key.

See Also: code.google.com/p/google-authenticator/

Generating the Secret Key

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ga = GoogleAuthenticator.new ga.secret_key # => “NINWS2QUIQD2LA2Z” ga.qrcode_url(‘user@domain.com’) # => “otpauth://totp/user@domain.com?secret=NINWS2QUIQD2LA2Z” ga.qrcode_image_url(‘user@domain.com’) # => “chart.googleapis.com/chart?chs=350x350&cht=qr&choe=UTF-8&chl=otpauth://totp/user@domain.com?secret=NINWS2QUIQD2LA2Z”

# Verifying a Key

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ga = GoogleAuthenticator.new(‘NINWS2QUIQD2LA2Z’) ga.key_valid?(key) # => true or false

# Generate Your Own Keys

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ga = GoogleAuthenticator.new(‘NINWS2QUIQD2LA2Z’) ga.get_keys # => [Previous, Current, Next]