Login usecase

[Aneela Saleem]

Thanks Brandon for your response.

Actually, My use-case is that I have a web application that authenticates a
user. Then user calls my backend services written in java to interact with
hadoop cluster. My hadoop cluster is kerberos-enabled. I need to
authenticate this user using my java code. I am able to login using keytab
files, but i did not get someway to login using password. For logging in
using keytab files, we need to place keytab files for all the system users
on all the hosts from where we can access our hadoop cluster. So this is
the main drawback. And as you say logging using keytab files is not
appropriate then how can we achieve this objective?

Thanks

On Mon, Jul 18, 2016 at 7:45 PM, Brandon Allbery <ballbery at sinenomine.net>
wrote:

> You are going to have to describe what you are trying to do in more
> detail. Keytabs are not normally used for this purpose, except in the case
> of automated procedures (e.g. cron) that need to log in to a service as if
> they are a user. Perhaps you have confused keytabs (“passwords” on disk)
> with ccaches (ephemeral service credentials, which may or may not be on
> disk and typically expire in a relatively short time)?
>
> On 7/17/16, 16:04, "kerberos-bounces at mit.edu on behalf of Aneela Saleem" <
> kerberos-bounces at mit.edu on behalf of aneela at platalytics.com> wrote:
>
>     Hi all,
>
>     If a user logs into any kerberized Application, using Krb5LoginModule,
>     there is a function loginFromKeyTab. Client should have the key tab
> file to
>     login to application. But I think this is very insecure way of login.
>     Anyone who cloud access your key tab file then login to application. Is
>     there any appropriate way to login to system. I don't understand How
> to do
>     this. I'm stuck
>
>     Thanks
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