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e1cfca1e2e
through Get_Pwnam_alloc(), which is the correct wrapper function. We were using it *some* of the time anyway, so this just makes us properly consistent. Jeremy. Autobuild-User: Jeremy Allison <jra@samba.org> Autobuild-Date: Wed Oct 20 16:02:12 UTC 2010 on sn-devel-104
126 lines
3.7 KiB
C
126 lines
3.7 KiB
C
/*
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Unix SMB/CIFS implementation.
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Authentication utility functions
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Copyright (C) Andrew Tridgell 1992-1998
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Copyright (C) Andrew Bartlett 2001
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Copyright (C) Jeremy Allison 2000-2001
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Copyright (C) Rafal Szczesniak 2002
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Copyright (C) Volker Lendecke 2006
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "smbd/globals.h"
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#include "../libcli/auth/libcli_auth.h"
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#include "nsswitch/winbind_client.h"
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#undef DBGC_CLASS
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#define DBGC_CLASS DBGC_AUTH
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/***************************************************************************
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Is the incoming username our own machine account ?
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If so, the connection is almost certainly from winbindd.
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***************************************************************************/
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static bool is_our_machine_account(const char *username)
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{
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bool ret;
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char *truncname = NULL;
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size_t ulen = strlen(username);
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if (ulen == 0 || username[ulen-1] != '$') {
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return false;
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}
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truncname = SMB_STRDUP(username);
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if (!truncname) {
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return false;
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}
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truncname[ulen-1] = '\0';
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ret = strequal(truncname, global_myname());
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SAFE_FREE(truncname);
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return ret;
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}
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/***************************************************************************
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Make (and fill) a user_info struct from a struct samu
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***************************************************************************/
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NTSTATUS make_server_info_sam(struct auth_serversupplied_info **server_info,
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struct samu *sampass)
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{
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struct passwd *pwd;
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struct auth_serversupplied_info *result;
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const char *username = pdb_get_username(sampass);
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NTSTATUS status;
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if ( !(result = make_server_info(NULL)) ) {
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return NT_STATUS_NO_MEMORY;
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}
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if ( !(pwd = Get_Pwnam_alloc(result, username)) ) {
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DEBUG(1, ("User %s in passdb, but getpwnam() fails!\n",
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pdb_get_username(sampass)));
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TALLOC_FREE(result);
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return NT_STATUS_NO_SUCH_USER;
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}
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status = samu_to_SamInfo3(result, sampass, global_myname(),
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&result->info3, &result->extra);
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if (!NT_STATUS_IS_OK(status)) {
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TALLOC_FREE(result);
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return status;
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}
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result->unix_name = pwd->pw_name;
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/* Ensure that we keep pwd->pw_name, because we will free pwd below */
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talloc_steal(result, pwd->pw_name);
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result->utok.gid = pwd->pw_gid;
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result->utok.uid = pwd->pw_uid;
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TALLOC_FREE(pwd);
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result->sanitized_username = sanitize_username(result,
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result->unix_name);
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if (result->sanitized_username == NULL) {
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TALLOC_FREE(result);
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return NT_STATUS_NO_MEMORY;
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}
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if (IS_DC && is_our_machine_account(username)) {
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/*
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* This is a hack of monstrous proportions.
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* If we know it's winbindd talking to us,
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* we know we must never recurse into it,
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* so turn off contacting winbindd for this
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* entire process. This will get fixed when
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* winbindd doesn't need to talk to smbd on
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* a PDC. JRA.
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*/
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(void)winbind_off();
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DEBUG(10, ("make_server_info_sam: our machine account %s "
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"turning off winbindd requests.\n", username));
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}
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DEBUG(5,("make_server_info_sam: made server info for user %s -> %s\n",
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pdb_get_username(sampass), result->unix_name));
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*server_info = result;
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return NT_STATUS_OK;
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}
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