Cross realm special question

[Sonja Benz]

Hello,

my example may be uncommon, but imagine an application which is not 
kerberized
wants to use the passwords of a  KDC for user authentication. 
To make the situation even more special, assume the principal is stored in 

a KDC which only can be accessed via cross realm trust. 

   ------------                               ------------
   KDC A                                  KDC B
   Realm: A.COM   <---trust --->  Realm: B.COM
   ------------                               ------------

   --------------
   host.other.com
   --------------

Let the application be kinit, for example:

Now, assume the user's password is stored in realm B.COM and the user at 
host.other.com is only able to access KDC A. Is it possible to get 

        host.other.com: $ kinit principal at B.COM 

working?

Sonja