[OpenAFS] Re: "vos dump" authorization based on "bos adduser"?

[Jeffrey Altman]

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Adam Megacz wrote:
> Derrick J Brashear <shadow@dementia.org> writes:
>> How does the bosserver decide you're eligible if there's no ptserver?
> 
> Okay, take 2: first, bosserver checks the request to see if it was
> directly signed with the KeyFile (ie you invoked bos with -localauth).
> Since it has the KeyFile, it should be able to do this without the
> help of ptserver.  If this is the case, it permits your request.  If
> not, it tries to contact ptserver.  If it is unable to contact the
> ptserver, it rejects your request.

All authenticated requests are encrypted using the key in the KeyFile.
The KeyFile is the file that stores the keys used to encrypt the
authenticator.  This has nothing at all to do with ptserver.

The ptserver maintains the authorization database.  In the AFS server
model, a client authenticates to the server and then the server queries
the ptserver for the authorization data for that user.  Based upon the
contents of the authorization data, the server permits or denies the
user's request.

bosserver cannot depend on ptserver because bosserver is the tool that
is used to start / stop ptserver.  Therefore, bosserver has its own
authorization data that is stored in a file.

Jeffrey Altman
Secure Endpoints Inc.

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