dschommer at acopia.com
Tue Nov 30 13:05:45 EST 2004
> - krb5_init_context()
> - krb5_cc_default()
> - krb5_get_init_creds_password()
> - krb5_kt_default()
> - krb5_verify_init_creds()
Yeah, those are good. Most of the hard work is handled within those
calls, no point in making your own client doing more work then is
needed. Maybe a krb5_cc_initialize(), krb5_cc_store_cred(), if you'd
like to store some credentials in a cache file.
From: Ken Hornstein [mailto:kenh at cmf.nrl.navy.mil]
Sent: Dienstag, 30. November 2004 12:39
To: krbdev at mit.edu
Subject: Re: krb5_rd_cred() ?
>I am adding some functionality to an existing pam module (pam_krb5afs,
>which is beyond the scope of this list) in which I do need to send the
>users password off to the kdc.
Okay, fair enough.
>Well from what I understand from other kerberos documentation I have
>read I need to validate the responses from the server and create a tgt
>and an entry in a keytab file. I guess what I really need to brush up
>on is the functions which will assist me in 1) validating the
>information in the response, 2) look for an existing entry in a keytab
>file, 3) create an entry in the keytab file, 4) create a valid ticket,
>3) validate the ticket. I hope those steps are accurate. "If" they
>I would need to call the folllwing functions to do this:
>calls to various krb5_get_init_creds_x to set my system specific
>krb5_init_secure_context() - to initialize kerberos libs with handle
FYI; just call krb5_init_context(); I doubt there is a reason to use
krb5_init_secure_context in this case.
As for the rest ... you could make your whole life simpler if you just
call krb5_verify_init_creds() :-)
>krb5_kt_default() - return handle to keytab file
>krb5_kt_get_entry() - search for existing keytab entry (if credentials
>exist make call to krb5_get_credentials_validate() )
>krb5_add_entry() - add entry to keytab
>krb5_kt_close() - close the keytab
Trust me, you _don't_ want to add anything to the keytab (at least, as
I understand what you're doing).
>krb5_get_init_creds_password() - to authenticate the user
>krb5_get_validated_creds() - check response from
I don't think krb5_get_validated_creds() does what you think it does.
In fact, I'm 99% sure of it.
>krb5_get_init_creds_password() call (is this where I get data to make
As we talked about, you don't need to do any clockskew checks; the
library does this for you.
I think what you want is:
And probably a krb5_parse_name() and krb5_sname_to_principal() in there
as well for the username and ap_req principal.
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