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samba-mirror/source3/libads/kerberos_util.c
Simo Sorce 893b213876 Avoid overriding default ccache for ads operations.
Avoid overriding default ccache for ads operations.

Nowadays various samba components may need to use GSSAPI and a default cred
cache to perform their tasks.
This code was completely overriding the whole process default ccache name, thus
altering the current credentials and sometimes hijacking them (or getting
preemptively hijaked).

By using gss_krb5_import_cred we can instead use a private ccache (necessary
sometimes to use a different set of credentials fromt he default
cifs/fqdn@realm one, for example when contacting foreign DCs using trust
credentials) that does not affect the rest of the process.

For the kerberos versions which don't have gss_krb5_import_cred
we fallback to temp override of KRB5CCNAME and gss_acquire_cred.

Signed-off-by: Alexander Bokovoy <ab@samba.org>
Signed-off-by: Günther Deschner <gd@samba.org>

Autobuild-User(master): Alexander Bokovoy <ab@samba.org>
Autobuild-Date(master): Wed Sep 12 21:18:09 CEST 2012 on sn-devel-104
2012-09-12 21:18:09 +02:00

81 lines
2.1 KiB
C

/*
Unix SMB/CIFS implementation.
krb5 set password implementation
Copyright (C) Andrew Tridgell 2001
Copyright (C) Remus Koos 2001 (remuskoos@yahoo.com)
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "smb_krb5.h"
#include "ads.h"
#include "lib/param/loadparm.h"
#ifdef HAVE_KRB5
/* run kinit to setup our ccache */
int ads_kinit_password(ADS_STRUCT *ads)
{
char *s;
int ret;
const char *account_name;
fstring acct_name;
if (ads->auth.flags & ADS_AUTH_USER_CREDS) {
account_name = ads->auth.user_name;
goto got_accountname;
}
if ( IS_DC ) {
/* this will end up getting a ticket for DOMAIN@RUSTED.REA.LM */
account_name = lp_workgroup();
} else {
/* always use the sAMAccountName for security = domain */
/* lp_netbios_name()$@REA.LM */
if ( lp_security() == SEC_DOMAIN ) {
fstr_sprintf( acct_name, "%s$", lp_netbios_name() );
account_name = acct_name;
}
else
/* This looks like host/lp_netbios_name()@REA.LM */
account_name = ads->auth.user_name;
}
got_accountname:
if (asprintf(&s, "%s@%s", account_name, ads->auth.realm) == -1) {
return KRB5_CC_NOMEM;
}
if (!ads->auth.password) {
SAFE_FREE(s);
return KRB5_LIBOS_CANTREADPWD;
}
ret = kerberos_kinit_password_ext(s, ads->auth.password,
ads->auth.time_offset,
&ads->auth.tgt_expire, NULL,
ads->auth.ccache_name, false, false,
ads->auth.renewable, NULL);
if (ret) {
DEBUG(0,("kerberos_kinit_password %s failed: %s\n",
s, error_message(ret)));
}
SAFE_FREE(s);
return ret;
}
#endif