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/*
Unix SMB/Netbios implementation.
Version 3.0
simple kerberos5 routines for active directory
Copyright (C) Andrew Tridgell 2001
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#if HAVE_KRB5
#include <krb5.h>
/*
we can't use krb5_mk_req because w2k wants the service to be in a particular format
*/
static krb5_error_code krb5_mk_req2(krb5_context context,
krb5_auth_context *auth_context,
const krb5_flags ap_req_options,
const char *service,
const char *realm,
krb5_ccache ccache,
krb5_data *outbuf)
{
krb5_error_code retval;
krb5_principal server;
krb5_creds * credsp;
krb5_creds creds;
krb5_data in_data;
retval = krb5_build_principal(context, &server, strlen(realm),
realm, service, NULL);
if (retval) {
DEBUG(1,("Failed to build principle for %s@%s\n", service, realm));
return retval;
}
/* obtain ticket & session key */
memset((char *)&creds, 0, sizeof(creds));
if ((retval = krb5_copy_principal(context, server, &creds.server)))
goto cleanup_princ;
if ((retval = krb5_cc_get_principal(context, ccache, &creds.client)))
goto cleanup_creds;
if ((retval = krb5_get_credentials(context, 0,
ccache, &creds, &credsp))) {
DEBUG(1,("krb5_get_credentials failed (%d)\n", retval));
goto cleanup_creds;
}
in_data.length = 0;
retval = krb5_mk_req_extended(context, auth_context, ap_req_options,
&in_data, credsp, outbuf);
if (retval) {
DEBUG(1,("krb5_mk_req_extended failed (%d)\n", retval));
}
krb5_free_creds(context, credsp);
cleanup_creds:
krb5_free_cred_contents(context, &creds);
cleanup_princ:
krb5_free_principal(context, server);
return retval;
}
/*
get a kerberos5 ticket for the given service
*/
DATA_BLOB krb5_get_ticket(char *service, char *realm)
{
krb5_error_code retval;
krb5_data packet;
krb5_ccache ccdef;
krb5_context context;
krb5_auth_context auth_context = NULL;
DATA_BLOB ret;
retval = krb5_init_context(&context);
if (retval) {
DEBUG(1,("krb5_init_context failed\n"));
goto failed;
}
if ((retval = krb5_cc_default(context, &ccdef))) {
DEBUG(1,("krb5_cc_default failed\n"));
goto failed;
}
if ((retval = krb5_mk_req2(context,
&auth_context,
AP_OPTS_MUTUAL_REQUIRED,
service, realm,
ccdef, &packet))) {
DEBUG(1,("krb5_mk_req2 failed\n"));
goto failed;
}
ret = data_blob(packet.data, packet.length);
/* Hmm, heimdal dooesn't have this - what's the correct call? */
/* krb5_free_data_contents(context, &packet); */
krb5_free_context(context);
return ret;
failed:
krb5_free_context(context);
return data_blob(NULL, 0);
}
#else /* HAVE_KRB5 */
/* this saves a few linking headaches */
DATA_BLOB krb5_get_ticket(char *service, char *realm)
{
DEBUG(0,("NO KERBEROS SUPPORT\n"));
return data_blob(NULL, 0);
}
#endif
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