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An implementation of the JOSE draft

Project Description


JOSE is a framework intended to provide a method to securely transfer claims (such as authorization information) between parties. The JOSE framework provides a collection of specifications to serve this purpose. A JSON Web Token (JWT) contains claims that can be used to allow a system to apply access control to resources it owns.

JWTs can be represented as either JSON Web Signature (JWS) or a JSON Web Encryption (JWE) objects. Claims within a JWS can be read as they are simply base64-encoded (but carry with them a signature for authentication). Claims in a JWE on the other hand, are encrypted and as such, are entirely opaque to clients using them as their means of authentication and authorization.

This library implements JWS and JWEs along with a subset of the encryption / authentication algorithms recommended by the JOSE framework.


1.0.0 (2015-10-06)

  • Fixed bug in authentication tag computation (patch contributed by jaimeperez)

Important: This is a backwards incompatible change, in that tokens produced in this version will not be decipherable by tokens < 1.0.0. The jwe hash string used was changed to use an empty string rather than “.” to fall in line with

0.3.0 (2015-04-10)

  • Fixed critical JWT vulnerability (patch contributed by yuriikonovaliuk)

Important: Only unencrypted tokens are vulnerable. This fix lead to backward incompatible change to verify function signature.

0.2.2 (2015-01-07)

  • RFC compliance fixes (patch contributed by jaimeperez)

Important: This change introduces a temporarily injected key (__v) in order to distinguish between legacy and newly issued tokens. This allows for the use of either token as to not break backwards compatibility and (possibly) degrade user experience. This will be removed for v1.0.

In order to verify whether or not clients are using a legacy token, the application code can verify whether or not the key “__v” is contained in the headers (this can be done after deserialize_compact). The existence of the key identifies a newly created token.

0.2.1 (2014-11-24)

  • Unpinned pycrypto dependency (patch contributed by kuba)
  • Added CLI exposing “decrypt” command
  • Added custom exceptions, making client error handling easier

0.1 (2014-04-16)

  • Initial release


Demian Brecht (demianbrecht) Nick Murtagh (nmurtagh) Jakub Warmuz (kuba) Jaime Pérez (jaimeperez) Yurii Konovaliuk (yuriikonovaliuk)

Release History

Release History

This version
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