[Freeipa-users] Distributing user keytabs for non-interactive auth question

[Michael ORourke]

Matt,

Try the following...

# Get admin TGT
kinit admin at REALM.COM

# Get keytab for user account
ipa-getkeytab -s coipa100 -p cron_runner at REALM.COM -k ipa_cron_runner.keytab

# Clear tickets
kdestroy

# Request TGT using the keytab
kinit -k -t ./cron_runner.keytab cron_runner at REALM.COM

# List tickets
klist

I recommend including the username somewhere in the name of the keytab file itself which makes it easier to remember.  Of course be careful with the permissions on the keytab file, because anyone that has read access to the keytab can get a TGT as that user.

-Mike

-----Original Message-----
>From: Matthew Sellers <matt at indigo.nu>
>Sent: Sep 25, 2016 8:37 PM
>To: freeipa-users at redhat.com
>Subject: [Freeipa-users] Distributing user keytabs for non-interactive auth	question
>
>Hi Guys,
>
>What is the best way to distribute a 'user' keytab to distribute
>keytabs to allow 'system users' to run scripts with non-interactive
>auth?  Is it possible to use the ipa-getkeytab feature ( with "-r"
>option ) to request a keytab for a user principal?  I see support for
>HOST and SERVICE keytabs, but nothing specific to user  keytabs?
>
>Concept Example:
>
>ipa-getkeytab -s ipa_server -p cron_runner at REALM.COM -k ipa_cron.keytab -r
>KRB5_KTNAME=ipa_cron.keytab service.py
>
>Actual Results ( tried with tgt for cron_runner or admin ):
>
>[sysadmin at 01 ~]$ ipa-getkeytab -s coipa100 -p cron_runner at REALM.COM
>-kipa_cron.keytab -r
>Failed to parse result: Insufficient access rights
>
>My only other option is grab the keytab and copy it around after
>initial creation ( understanding that each keytab requests bumps the
>KVNO ).  My goal is to make password-less authentication for automated
>processes as easy as possible to setup....ipa-getkeytab seems like its
>almost there?
>
>Love the work you guys are putting out, its a really cool system.
>
>Thanks,
>Matt
>
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