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/*
* lib/krb4/g_svc_in_tkt.c
*
* Copyright 1987, 1988 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*/
#include <string.h>
#include <stdlib.h>
#include "krb.h"
#include "prot.h"
#include "krb4int.h"
/*
* This file contains two routines: srvtab_to_key(), which gets
* a server's key from a srvtab file, and krb_get_svc_in_tkt() which
* gets an initial ticket for a server.
*/
/*
* srvtab_to_key(): given a "srvtab" file (where the keys for the
* service on a host are stored), return the private key of the
* given service (user.instance@realm).
*
* srvtab_to_key() passes its arguments on to read_service_key(),
* plus one additional argument, the key version number.
* (Currently, the key version number is always 0; this value
* is treated as a wildcard by read_service_key().)
*
* If the "srvtab" argument is null, KEYFILE (defined in "krb.h")
* is passed in its place.
*
* It returns the return value of the read_service_key() call.
* The service key is placed in "key".
*/
static int srvtab_to_key(user, instance, realm, srvtab, key)
char *user, *instance, *realm, *srvtab;
C_Block key;
{
if (!srvtab)
srvtab = KEYFILE;
return(read_service_key(user, instance, realm, 0, srvtab,
(char *)key));
}
/*
* krb_get_svc_in_tkt() passes its arguments on to krb_get_in_tkt(),
* plus two additional arguments: a pointer to the srvtab_to_key()
* function to be used to get the key from the key file and a NULL
* for the decryption procedure indicating that krb_get_in_tkt should
* use the default method of decrypting the response from the KDC.
*
* It returns the return value of the krb_get_in_tkt() call.
*/
int KRB5_CALLCONV
krb_get_svc_in_tkt(user, instance, realm, service, sinstance, life, srvtab)
char *user, *instance, *realm, *service, *sinstance;
int life;
char *srvtab;
{
return(krb_get_in_tkt(user, instance, realm, service, sinstance, life,
(key_proc_type) srvtab_to_key, NULL, srvtab));
}
/* and we need a preauth version as well. */
static C_Block old_key;
static int stub_key(user,instance,realm,passwd,key)
char *user, *instance, *realm, *passwd;
C_Block key;
{
memcpy(key, old_key, sizeof(C_Block));
return 0;
}
int
krb_get_svc_in_tkt_preauth(user, instance, realm, service, sinstance, life, srvtab)
char *user, *instance, *realm, *service, *sinstance;
int life;
char *srvtab;
{
char *preauth_p;
int preauth_len;
int ret_st;
krb_mk_preauth(&preauth_p, &preauth_len,
(key_proc_type) srvtab_to_key, user, instance, realm,
srvtab, old_key);
ret_st = krb_get_in_tkt_preauth(user,instance,realm,service,sinstance,life,
(key_proc_type) stub_key, NULL, srvtab,
preauth_p, preauth_len);
krb_free_preauth(preauth_p, preauth_len);
return ret_st;
}
/* DEC's dss-kerberos adds krb_svc_init; simple enough */
int
krb_svc_init(user,instance,realm,lifetime,srvtab_file,tkt_file)
char *user;
char *instance;
char *realm;
int lifetime;
char *srvtab_file;
char *tkt_file;
{
if (tkt_file)
krb_set_tkt_string(tkt_file);
return krb_get_svc_in_tkt(user,instance,realm,
KRB_TICKET_GRANTING_TICKET,realm,lifetime,srvtab_file);
}
int
krb_svc_init_preauth(user,instance,realm,lifetime,srvtab_file,tkt_file)
char *user;
char *instance;
char *realm;
int lifetime;
char *srvtab_file;
char *tkt_file;
{
if (tkt_file)
krb_set_tkt_string(tkt_file);
return krb_get_svc_in_tkt_preauth(user,instance,realm,
KRB_TICKET_GRANTING_TICKET,realm,lifetime,srvtab_file);
}
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