08-18-2008
Thanks for your reply
As a result of your link I found this:
"To learn more on the Kerberos APIs, refer to the IBM Network Authentication Service Version 1.4 Application Development Reference guide shipped on the AIX 5L Version 5.3 Expansion Pack CD and the sample Kerberos example programs bundled with the IBM NAS product."
My system admin installed what I needed and there was indeed a samples directory which contained exactly what I needed
There's a source code example called krb_login.c which shows how to authenticate with the principal and password and there's even a keytab version along with other examples:
- Login using principal and password
- Login from keytab
- List credentials
- Destroy credentials
- Create principal
- Delete principal
There's even a complete client/server implementation too!
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LEARN ABOUT CENTOS
ipa-rmkeytab
ipa-rmkeytab(1) IPA Manual Pages ipa-rmkeytab(1)
NAME
ipa-rmkeytab - Remove a kerberos principal from a keytab
SYNOPSIS
ipa-rmkeytab [ -p principal-name ] [ -k keytab-file ] [ -r realm ] [ -d ]
DESCRIPTION
Removes a kerberos principal from a keytab.
Kerberos keytabs are used for services (like sshd) to perform kerberos authentication. A keytab is a file with one or more secrets (or
keys) for a kerberos principal.
A kerberos service principal is a kerberos identity that can be used for authentication. Service principals contain the name of the ser-
vice, the hostname of the server, and the realm name.
ipa-rmkeytab provides two ways to remove principals. A specific principal can be removed or all principals for a given realm can be
removed.
All encryption types and versions of a principal are removed.
The realm may be included when removing a specific principal but it is not required.
NOTE: removing a principal from the keytab does not affect the Kerberos principal stored in the IPA server. It merely removes the entry
from the local keytab.
OPTIONS
-p principal-name
The non-realm part of the full principal name.
-k keytab-file
The keytab file to append the principal(s) from.
-r realm
A realm to remove all principals for.
-d Debug mode. Additional information is displayed.
EXAMPLES
Remove the NFS service principal on the host foo.example.com from /tmp/nfs.keytab.
# ipa-rmkeytab -p nfs/foo.example.com -k /tmp/nfs.keytab
Remove the ldap service principal on the host foo.example.com from /etc/krb5.keytab.
# ipa-rmkeytab -p ldap/foo.example.com -k /etc/krb5.keytab
Remove all principals for the realm EXAMPLE.COM.
# ipa-rmkeytab -r EXAMPLE.COM -k /etc/krb5.keytab
EXIT STATUS
The exit status is 0 on success, nonzero on error.
1 Kerberos initialization failed
2 Memory allocation error
3 Unable to open keytab
4 Unable to parse the principal name
5 Principal name or realm not found in keytab
6 Unable to remove principal from keytab
IPA
Oct 30 2009 ipa-rmkeytab(1)