How to set an operating system password to a principal

[Gerd Pokorra]

      Hello!

  I have a string, which holds the encrypted password from a user like
  it is stored by Linux in the file /etc/shadow. I think the password
  is encrypted with MD5.
  I created a corresponding principal. Which fields do I have to set in the
  structure krb5_principal so that the principal has the same password like
  the corresponding user-entry from the operating system?

    Gerd Pokorra
    E-Mail: pokorra at hrz.uni-siegen.de