Add support for OTP secret key encryption #62
Merged
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Why:
To provide an additional layer of security.
The TOTP spec (RFC 6238) recommends encrypting the keys.
http://tools.ietf.org/html/rfc6238
How:
Borrow the encryption code from the
attr_encrypted
gem and use it toencrypt and decrypt the
otp_secret_key
attribute.Allow users to add encryption by passing in
encrypted: true
tohas_one_time_password
. This provides backwards-compatibility forexisting users of the gem.
See the README updates for more detailed instructions for both new
and existing users.