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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* lib/krb5/krb/in_tkt_sky.c */
/*
* Copyright 1990,1991, 2008 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 "k5-int.h"
#include "int-proto.h"
/* Copy the caller-provided keyblock into the AS keyblock. */
static krb5_error_code
get_as_key_skey(krb5_context context, krb5_principal client,
krb5_enctype etype, krb5_prompter_fct prompter,
void *prompter_data, krb5_data *salt, krb5_data *params,
krb5_keyblock *as_key, void *gak_data,
k5_response_items *ritems)
{
const krb5_keyblock *key = gak_data;
if (!krb5_c_valid_enctype(etype))
return(KRB5_PROG_ETYPE_NOSUPP);
if (as_key->length)
krb5_free_keyblock_contents(context, as_key);
return krb5int_c_copy_keyblock_contents(context, key, as_key);
}
/*
Similar to krb5_get_in_tkt_with_password.
Attempts to get an initial ticket for creds->client to use server
creds->server, (realm is taken from creds->client), with options
options, and using creds->times.starttime, creds->times.endtime,
creds->times.renew_till as from, till, and rtime.
creds->times.renew_till is ignored unless the RENEWABLE option is requested.
If addrs is non-NULL, it is used for the addresses requested. If it is
null, the system standard addresses are used.
If keyblock is NULL, an appropriate key for creds->client is retrieved
from the system key store (e.g. /etc/srvtab). If keyblock is non-NULL,
it is used as the decryption key.
A succesful call will place the ticket in the credentials cache ccache.
returns system errors, encryption errors
*/
krb5_error_code KRB5_CALLCONV
krb5_get_in_tkt_with_skey(krb5_context context, krb5_flags options,
krb5_address *const *addrs, krb5_enctype *ktypes,
krb5_preauthtype *pre_auth_types,
const krb5_keyblock *key, krb5_ccache ccache,
krb5_creds *creds, krb5_kdc_rep **ret_as_reply)
{
krb5_error_code retval;
char *server;
krb5_principal server_princ, client_princ;
int use_master = 0;
krb5_get_init_creds_opt *opts = NULL;
retval = k5_populate_gic_opt(context, &opts, options, addrs, ktypes,
pre_auth_types, creds);
if (retval)
return retval;
retval = krb5_get_init_creds_opt_set_out_ccache(context, opts, ccache);
if (retval)
goto cleanup;
#ifndef LEAN_CLIENT
if (key == NULL) {
retval = krb5_get_init_creds_keytab(context, creds, creds->client,
NULL /* keytab */,
creds->times.starttime,
NULL /* in_tkt_service */,
opts);
goto cleanup;
}
#endif /* LEAN_CLIENT */
retval = krb5_unparse_name(context, creds->server, &server);
if (retval)
goto cleanup;
server_princ = creds->server;
client_princ = creds->client;
retval = k5_get_init_creds(context, creds, creds->client,
krb5_prompter_posix, NULL, 0, server, opts,
get_as_key_skey, (void *)key, &use_master,
ret_as_reply);
krb5_free_unparsed_name(context, server);
if (retval)
goto cleanup;
krb5_free_principal( context, creds->server);
krb5_free_principal( context, creds->client);
creds->client = client_princ;
creds->server = server_princ;
cleanup:
krb5_get_init_creds_opt_free(context, opts);
return retval;
}
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