Intro
=====
Yoracle is an authenticator for yubikeys. It uses a sqlite database as
backend.

The first time a yubikey is used after it's plugged in you have to
prefix the yubikey token (what you get when you press the button) with
a static password. That password will not have to be used again until
the Yubikey is unplugged and plugged back in.


Prerequisites
=============
* Install web.py from webpy.org (http://webpy.org/download)
   wget http://webpy.org/static/web.py-0.33.tar.gz
   tar xvzf web.py-0.33.tar.gz
   cd web.py-0.33
   sudo python setup.py install

  Also exists in Debian, but Debian Lenny has too old a version.
* Yubikey with a 12 modhex-character id, and know its AES key.
  In this example the key id is "hjhghliehbhu".
    ykpersonalize \
                  -a$(hexdump -n16 /dev/random -e '/1 "%02x"') \
                  -ofixed=hjhghliehbhu
  Modhex is Yubikeys encoding scheme where not all characters are
  allowed. See http://www.yubico.com/developers/modhex/


Installing
==========
* Create key database:
  sqlite3 yoracle.sqlite < schema.sql
* generate generate the hash for the static key for a yubikey
   echo -n myPass123  | sha1sum 
   a230c761d781eaec2a3495d61be8301f42f80d1d  -
* Put your key in the database
  sqlite3 yoracle.sqlite
    insert into yubikey(yubikeyid, aeskey,password, counter,
        counter_session, secret_id, timestamp, passwordok)
        values('xxxaaaxxxaaa',                              -- key ID
                '12312312313212312312312312312312',         -- AES key
                'a230c761d781eaec2a3495d61be8301f42f80d1d', -- static key
                0,0,
                '000000000000', -- key uid. normally 000000000000
                0, 0);
* Configure for user (only needed for local authentication, not yoweb.py)
   echo xxxaaaxxxaaa http://localhost/placeholder?token=%(token)s > ~/.yubikeys
* Test the authentication
  ./yoracle.py
  myusernamehere
  enter password and press yubikey here

  Should return "OK"
* Start a web server authenticator
  ./yoweb.py 8080