Ah, I'd not remembered you could inline C like that. I had similar C code from some other project I'd found on the 'net, but I wasn't looking forward to figuring out all the error checking I'd need between that executable and perl. Using this, I wouldn't have to worry about it as much.

But, I had continued my quest for a pure perl solution while waiting for replies to my question. I sent some email to one of the authors of the Kerberos modules, Jeff Horwitz, he sent the following code as a quick example of how he allows users to change their password. He states in his email:

here's some patched together code that should do the trick (insert your own username, password, and error checking): 
use Authen::Krb5;
use Authen::Krb5::Admin;

Authen::Krb5::init_context();
my $kadm = Authen::Krb5::Admin->init_with_password($user, $pw);
my $princ = Authen::Krb5::parse_name($user); 
my $rc = $kadm->chpass_principal($princ, $pw);

[download]
Being part of the "Admin" package, I had assumed that the chpass_principal method needed administrative access rights, apparently that assumption was incorrect. I've not yet tried it, but have no reason to believe it won't work. When I get a chance to try it out, hopefully by the end of today, I'll report back.

Update: Sorry for the delay, I had other projects that kept me from testing this until late last Friday. This doesn't work on an expired password as I need. The init_with_password method returns an error saying the password has expired, thus the $kadm object is invalid, and the chpass_principal method can not be called. Looks like its' back to the inline C code... -Scott

In reply to Re^2: Change a user's Kerberos Password? by 5mi11er
in thread Change a user's Kerberos Password? by 5mi11er

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