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https://issues.apache.org/jira/browse/CXF-4431?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13421520#comment-13421520
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Sergey Beryozkin commented on CXF-4431:
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Hi, here is the initial commit to the trunk:
http://svn.apache.org/viewvc?rev=1365160&view=rev

will merge it later to 2.6.x.

Here are some comments on the modifications I did:
- Made relevant updates to get the latest draft supported
- I did quite a few refactorings, mainly to get all the Hmac and normalization 
work
done in one or two places.
- I did not introduce mac specific properties into ClientAccessToken - it needs 
to be able to manage not only bearer/mac, but other types too,
it has the typed well-known properties all token share and then a map of 
parameters for keeping the token specific extensions
- I've not added a NonceVerifier implementation yet, only the interface. I 
think the implementation is actually pretty advanced :-), which is good,
  but I guess we need to think a bit more about whether we should ship it with 
CXF or may be as part of the demo - may be we should get ECache-based store 
added, etc, need to think more
- plus few other bits and pieces

Hope you will won't be disappointed with the changes I did. 

Overall it's a very good contribution - thanks for the effort. 
Few more minor updates may need to be done, like the queries normalization, 
etc, but it's nearly there.

As a side note - I'd like to review if we can get this Mac-specific code 
available to other OAuth projects once it settles down a bit, we can discuss it 
offline, I'll ping you here or please ping me later on. 


                
> Add support for OAuth2 'mac' token type
> ---------------------------------------
>
>                 Key: CXF-4431
>                 URL: https://issues.apache.org/jira/browse/CXF-4431
>             Project: CXF
>          Issue Type: Improvement
>          Components: JAX-RS, JAX-RS Security
>    Affects Versions: 2.6.1
>            Reporter: Sasi M
>             Fix For: 2.7.0
>
>         Attachments: mac_token_nonce_checking.txt, mac_token_support.txt
>
>
> CXF currently supports only the Bearer token type. This token type is not 
> feasible for use without SSL.
> OAuth2 specs out the 'mac' token type that requires request signing for 
> authentication using the access token. The spec is described here:
> http://tools.ietf.org/html/draft-ietf-oauth-v2-http-mac-01

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