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Re: How to check UID of process on the other side of local TCP/UDP conne

from [Greg Metcalfe] Network Security [Permanent Link]
Subject: Re: How to check UID of process on the other side of local TCP/UDP connection
Date: Tue, 28 Nov 2006 22:29:34 -0800 
On Monday 27 November 2006 12:06, Vladimir Mitiouchev wrote:

On 11/24/06, rainmailbox2001-ola@yahoo.ca <rainmailbox2001-ola@yahoo.ca> 

wrote:

Do you have any ideas how this local
authentication can be achieved in some
different way?


identd
fstat (BSD)
lsof(Linux)


Unix sockets (unless of course Unix sockets are
the only good way to
resolve my problems).


SCM_CREDS (BSD)
SO_PEERCRED (Linux)

SO_PEERCRED isn't supported on HP-UX 11i for PA-RISC, at least. I think there 
are some hoops to jump through in using SCM_CREDS. This may have all been 
resolved for HP-UX versions for Itanic, though. I have no idea what might be 
involved on AIX.

I think the most portable solution (O.P. wants portability across all modern 
Unices) would be via the OpenSSL libs. There are vendor supported packages 
available for Solaris, HP-UX, and AIX--probably pretty much the last of the 
commercial Unices he has to worry about.

As the O.P. needs hundreds of connections per second, this might be too 
expensive. But it would probably keep his porting work to a minimum.
-- 
Greg Metcalfe
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