#include "kuser_locl.h"


int
main (int argc, char **argv)
{
  krb5_error_code err;
  krb5_context context;
  krb5_ccache  ccache;
  krb5_principal principal;
  krb5_principal server;
  krb5_creds cred;
  krb5_preauthtype pre_auth[] = {KRB5_PADATA_ENC_TIMESTAMP};

  err = krb5_init_context (&context);
  if (err)
      errx (1, "%s", krb5_get_err_text(context, err));
  
  err = krb5_cc_default (context, &ccache);
  if (err)
      errx (1, "%s", krb5_get_err_text(context, err));
  
  if(argv[1]){
      err = krb5_parse_name (context, argv[1], &principal);
      if (err)
	  errx (1, "%s", krb5_get_err_text(context, err));
      
  }else{
      char *realm;
      struct passwd *pw;

      err = krb5_get_default_realm (context, &realm);
      if (err)
	  errx (1, "%s", krb5_get_err_text(context, err));
      pw = getpwuid(getuid());
      krb5_build_principal(context, &principal, strlen(realm), realm,
			   pw->pw_name, NULL);
      free(realm);
  }

  err = krb5_cc_initialize (context, ccache, principal);
  if (err)
      errx (1, "%s", krb5_get_err_text(context, err));

  cred.client = principal;
  cred.times.endtime = 0;

  err = krb5_build_principal_ext (context,
				  &cred.server,
#ifdef USE_ASN1_PRINCIPAL
				  strlen(principal->realm),
				  principal->realm,
#else
				  principal->realm.length,
				  principal->realm.data,
#endif
				  strlen("krbtgt"),
				  "krbtgt",
#ifdef USE_ASN1_PRINCIPAL
				  strlen(principal->realm),
				  principal->realm,
#else
				  principal->realm.length,
				  principal->realm.data,
#endif
				  NULL);
  if (err)
      errx (1, "%s", krb5_get_err_text(context, err));

#ifdef USE_ASN1_PRINCIPAL
  cred.server->name.name_type = KRB5_NT_SRV_INST;
#else
  cred.server->type = KRB5_NT_SRV_INST;
#endif

  err = krb5_get_in_tkt_with_password (context,
				       0,
				       NULL,
				       NULL,
				       /*NULL*/ pre_auth,
				       NULL,
				       ccache,
				       &cred,
				       NULL);
  if (err)
      errx (1, "%s", krb5_get_err_text(context, err));
  
  krb5_free_context (context);
  return 0;
}