BTW, you're right about an LSA-style ccache, where the agent daemon caches all logged-in users' creds. The SSH agent is more like a per-user daemon, so Unix perms suffice to control access to SSH agents.
If we're gonna go so far as to have something like an LSA, then the thing to do is not just to cache creds, but to put the AP_REQ/AP_REP processing in the agent itself, like the MS LSA does (I think). Nico On Thu, Oct 04, 2001 at 12:24:24PM -0400, Nicolas Williams wrote: > SSH's ssh-agent uses Unix file permissions to take care of this problem. > What works for SSH can work for Kerberos. > > No need for credentials passing over Unix sockets or pipes. > > q.e.d. > > Nico > > > On Thu, Oct 04, 2001 at 09:03:45AM -0700, Paul Sangster wrote: > > > > > > > If we were to push the ccache into a separate daemon (like the LSA > > on Windows) then it would seem that the clients still need a way > > to prove to this daemon that they are authorized to gain access > > to the ccache entry. This would likely still involve the daemon > > learning the uid of the requesting process to know which ccache > > entry to allow access. > > > > In Solaris we have a way to reasonably safely pass a UID between > > processes, but it seems like we're still back to UID based access > > controls. The main difference is elimination of relying on the file > > system permissions to perform the access controls instead now > > relying on this new daemon. Is this a significant improvement? > > > > > -----Original Message----- > > > From: Nicolas Williams [mailto:[EMAIL PROTECTED]] > > > Sent: 03 October 2001 20:31 > > > To: Paul B. Hill; [EMAIL PROTECTED] > > > Subject: Re: Ticket stored, accessed where? > > > > > > It would be nice if there were an agent-type ccache for Unix, much like > > > the ccapi one for Windows. Heck, the SSH ssh-agent could be a good place > > > to start, particularly in view of SSH's agent forwarding feature. > > > > > > Nico > -- > -DISCLAIMER: an automatically appended disclaimer may follow. By posting- > -to a public e-mail mailing list I hereby grant permission to distribute- > -and copy this message.- > > Visit our website at http://www.ubswarburg.com > > This message contains confidential information and is intended only > for the individual named. If you are not the named addressee you > should not disseminate, distribute or copy this e-mail. Please > notify the sender immediately by e-mail if you have received this > e-mail by mistake and delete this e-mail from your system. > > E-mail transmission cannot be guaranteed to be secure or error-free > as information could be intercepted, corrupted, lost, destroyed, > arrive late or incomplete, or contain viruses. The sender therefore > does not accept liability for any errors or omissions in the contents > of this message which arise as a result of e-mail transmission. If > verification is required please request a hard-copy version. This > message is provided for informational purposes and should not be > construed as a solicitation or offer to buy or sell any securities or > related financial instruments. -- -DISCLAIMER: an automatically appended disclaimer may follow. By posting- -to a public e-mail mailing list I hereby grant permission to distribute- -and copy this message.- Visit our website at http://www.ubswarburg.com This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. E-mail transmission cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept liability for any errors or omissions in the contents of this message which arise as a result of e-mail transmission. If verification is required please request a hard-copy version. This message is provided for informational purposes and should not be construed as a solicitation or offer to buy or sell any securities or related financial instruments.
