This is cl-oauth, an implementation of the OAuth 1.0a standard
in Common Lisp.

Spec URI:

Section numbers mentioned in the code and documentation
refer to this document, unless mentioned otherwise.

Most of the code has passed basic manual and automated tests,
but the SP code hasn't been used in a real-world application

Not supported at this time:

Service Provider:

  * parameters from Auth header (needs some parsing) [5.4]
    in principle a MUST, but as SP you get to decide ;)

  * Nonce checking [9], a SHOULD.

  * Session extension
  * Problem Reporting extension


  * Auth parameters should be working, but Google rejects them for
    some reason. Do more testing and debugging.

  * Revoking tokens as per section 7 of the Session extension

  * Problem Reporting extension: fields in body are ignored.


  * crypto signatures different from HMAC-SHA1. It's easy to use
    other digests and MACs via Ironclad but RSA needs to have
    padding implemented. [9.3]

  * PLAINTEXT signature. Meh. [9.4]

  * POST and Auth requests are hardly tested yet.

People who contributed in a substantial way to this library:

  * Leslie P. Polzer <>: base implementation.

See also revision log for minor contributions.

TODO (apart from spec things not implemented yet):

  * grep the code for TODO and FIXME

  * incorporate test cases from

  * abstract token storage, can't get far with volatile memory

  * better handling of different protocol versions; in particular
    we should support serving both 1.0 and 1.0a clients (and requesting
    stuff from 1.0 and 1.0a servers too, of course).

  * compare with the Hammer draft spec and resolve differences

  * always store the URL-decoded key/secret in the request token

Leslie P. Polzer <>
llgpl, networking, web api