yubikey-val
===========

The YubiKey Validation Server (YK-VAL) is a server that validates Yubikey OTPs. It is written in PHP, for use with web servers such as Apache.

The server implements the Yubico API protocol as defined in:

http://yubico.com/developers/api/

This server talks to another service for decrypting the OTPs, to avoid storing any AES keys within the validation server. One implementation of this service is YKKSM:

https://github.com/Yubico/yubikey-ksm

Another implementation of a KSM using the YubiHSM hardware is Python-PyHSM:

https://github.com/Yubico/python-pyhsm

Note that version 1.x is a minimal centralized server. Version 2.x is a replicated system that uses multiple machines.

Releases are available from:

http://yubico.github.com/yubikey-val/releases.html

Documentation is in doc/

If you've checked out the source tree and the doc/ dir is empty, do

    $ git submodule init
    $ git submodule update

The documentation is also available online at

    http://github.com/Yubico/yubikey-val/wiki