[IPP] Questions regarding IPP and oAuth

[IPP] Questions regarding IPP and oAuth

[IPP] Questions regarding IPP and oAuth

Paul Tykodi ptykodi at tykodi.com
Wed Nov 16 19:09:09 UTC 2016

Hi Jeremy,

We had some OAuth - IPP discussions when creating the IPP Scan specification and I believe the approved IPP Scan standard may include answers to some of your OAuth security token related questions.

I'm currently out of the office in a location where I can't access the IPP Scan standard to check my memory on what we ultimately included about OAuth though.

Hopefully you might get a little help from the IPP Scan standard while waiting for others to respond.

Best Regards,


Sent from my iPhone

> On Nov 16, 2016, at 1:34 PM, Jeremy Leber <jeremy.leber at lexmark.com> wrote:
> Hi All,
> I could use some clarification on the proper way to use OAuth with IPP, given the following scenario:
> I have an IPP endpoint that requires verification of the client's identify and validation of the client's authorization before printing a job.  The client has obtained an OAuth token that will be used for this purpose.
> When implementing this, should the implementor assume that IPP allows and expects OAuthv2 tokens to be included in the HTTP header (as would be the case for any other HTTP request)?   
> If this IS the case, does the system expect any other user authentication information in the IPP request itself?
> As an implementor, when implementing an IPP service with OAuth, are the following assumptions correct?
> uri-authentication-supported MUST contain 'oauth' if OAuthv2 is supported
> oauth-authorization-server-uri MUST contain the OAuthv2 authorization URI to be used to authorize the user if uri-authentication-supported contains 'oauth'
> The users actual OAuthv2 token MUST be supplied in the HTTP Header Authorization line as a Bearer Token per the Oauth RFC
> The IPP service will/may authorize access to the printer/device using the supplied OAuthv2 token
> access-oauth-token and access-oauth-uri are only used to access a Document on behalf of the user to be processed by the service not for printer/device access itself
> And a few extra questions:
> Has any discussion or consideration been had regarding using ID tokens to represent the job owner (i.e. the requesting-user-name)?
> If the authentication process using SAML or OpenID Connect, it may retrieve a JWT or SAML Assertion which contains the user's identity, has any discussion been had about the benefits or pitfalls or delvierying the JWT/Assertions as the identity instead of a simple requesting-user-name?
> Sorry for the lengthy questions... would love to get some quick feedback from the group.  
> Thanks!
> Jeremy
> Jeremy Leber
> Area Owner, Network Firmware Development
> O  +1 859 825-4505
> jeremy.leber at lexmark.com
> www.lexmark.com
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> ipp at pwg.org
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