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samba-mirror/source3/lib/popt_common.c
Andreas Schneider 0caf40ec01 s3:popt_common: Reparse the username in popt_common_credentials_post()
When we parse the username in the options handling, the smb.conf file
has not been loaded yet. So we are not aware of a 'winbind separator'
set in the config file.

We need to read and set the username again in the post-processing of the
credentials.

https://bugzilla.samba.org/show_bug.cgi?id=12849

Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
2017-06-20 10:39:15 +02:00

429 lines
11 KiB
C

/*
Unix SMB/CIFS implementation.
Common popt routines
Copyright (C) Tim Potter 2001,2002
Copyright (C) Jelmer Vernooij 2002,2003
Copyright (C) James Peach 2006
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 "popt_common.h"
#include "lib/param/param.h"
/* Handle command line options:
* -d,--debuglevel
* -s,--configfile
* -O,--socket-options
* -V,--version
* -l,--log-base
* -n,--netbios-name
* -W,--workgroup
* -i,--scope
*/
enum {OPT_OPTION=1};
extern bool override_logfile;
static void set_logfile(poptContext con, const char * arg)
{
char *lfile = NULL;
const char *pname;
/* Find out basename of current program */
pname = strrchr_m(poptGetInvocationName(con),'/');
if (!pname)
pname = poptGetInvocationName(con);
else
pname++;
if (asprintf(&lfile, "%s/log.%s", arg, pname) < 0) {
return;
}
lp_set_logfile(lfile);
SAFE_FREE(lfile);
}
static bool PrintSambaVersionString;
static void popt_s3_talloc_log_fn(const char *message)
{
DEBUG(0,("%s", message));
}
static void popt_common_callback(poptContext con,
enum poptCallbackReason reason,
const struct poptOption *opt,
const char *arg, const void *data)
{
if (reason == POPT_CALLBACK_REASON_PRE) {
set_logfile(con, get_dyn_LOGFILEBASE());
talloc_set_log_fn(popt_s3_talloc_log_fn);
talloc_set_abort_fn(smb_panic);
return;
}
if (reason == POPT_CALLBACK_REASON_POST) {
if (PrintSambaVersionString) {
printf( "Version %s\n", samba_version_string());
exit(0);
}
if (is_default_dyn_CONFIGFILE()) {
if(getenv("SMB_CONF_PATH")) {
set_dyn_CONFIGFILE(getenv("SMB_CONF_PATH"));
}
}
/* Further 'every Samba program must do this' hooks here. */
return;
}
switch(opt->val) {
case OPT_OPTION:
{
struct loadparm_context *lp_ctx;
lp_ctx = loadparm_init_s3(talloc_tos(), loadparm_s3_helpers());
if (lp_ctx == NULL) {
fprintf(stderr, "loadparm_init_s3() failed!\n");
exit(1);
}
if (!lpcfg_set_option(lp_ctx, arg)) {
fprintf(stderr, "Error setting option '%s'\n", arg);
exit(1);
}
TALLOC_FREE(lp_ctx);
break;
}
case 'd':
if (arg) {
lp_set_cmdline("log level", arg);
}
break;
case 'V':
PrintSambaVersionString = True;
break;
case 'O':
if (arg) {
lp_set_cmdline("socket options", arg);
}
break;
case 's':
if (arg) {
set_dyn_CONFIGFILE(arg);
}
break;
case 'n':
if (arg) {
lp_set_cmdline("netbios name", arg);
}
break;
case 'l':
if (arg) {
set_logfile(con, arg);
override_logfile = True;
set_dyn_LOGFILEBASE(arg);
}
break;
case 'i':
if (arg) {
lp_set_cmdline("netbios scope", arg);
}
break;
case 'W':
if (arg) {
lp_set_cmdline("workgroup", arg);
}
break;
}
}
struct poptOption popt_common_connection[] = {
{ NULL, 0, POPT_ARG_CALLBACK, (void *)popt_common_callback },
{ "socket-options", 'O', POPT_ARG_STRING, NULL, 'O', "socket options to use",
"SOCKETOPTIONS" },
{ "netbiosname", 'n', POPT_ARG_STRING, NULL, 'n', "Primary netbios name", "NETBIOSNAME" },
{ "workgroup", 'W', POPT_ARG_STRING, NULL, 'W', "Set the workgroup name", "WORKGROUP" },
{ "scope", 'i', POPT_ARG_STRING, NULL, 'i', "Use this Netbios scope", "SCOPE" },
POPT_TABLEEND
};
struct poptOption popt_common_samba[] = {
{ NULL, 0, POPT_ARG_CALLBACK|POPT_CBFLAG_PRE|POPT_CBFLAG_POST, (void *)popt_common_callback },
{ "debuglevel", 'd', POPT_ARG_STRING, NULL, 'd', "Set debug level", "DEBUGLEVEL" },
{ "configfile", 's', POPT_ARG_STRING, NULL, 's', "Use alternate configuration file", "CONFIGFILE" },
{ "log-basename", 'l', POPT_ARG_STRING, NULL, 'l', "Base name for log files", "LOGFILEBASE" },
{ "version", 'V', POPT_ARG_NONE, NULL, 'V', "Print version" },
{ "option", 0, POPT_ARG_STRING, NULL, OPT_OPTION, "Set smb.conf option from command line", "name=value" },
POPT_TABLEEND
};
struct poptOption popt_common_configfile[] = {
{ NULL, 0, POPT_ARG_CALLBACK|POPT_CBFLAG_PRE|POPT_CBFLAG_POST, (void *)popt_common_callback },
{ "configfile", 0, POPT_ARG_STRING, NULL, 's', "Use alternate configuration file", "CONFIGFILE" },
POPT_TABLEEND
};
struct poptOption popt_common_version[] = {
{ NULL, 0, POPT_ARG_CALLBACK|POPT_CBFLAG_POST, (void *)popt_common_callback },
{ "version", 'V', POPT_ARG_NONE, NULL, 'V', "Print version" },
POPT_TABLEEND
};
struct poptOption popt_common_debuglevel[] = {
{ NULL, 0, POPT_ARG_CALLBACK, (void *)popt_common_callback },
{ "debuglevel", 'd', POPT_ARG_STRING, NULL, 'd', "Set debug level", "DEBUGLEVEL" },
POPT_TABLEEND
};
struct poptOption popt_common_option[] = {
{ NULL, 0, POPT_ARG_CALLBACK|POPT_CBFLAG_POST, (void *)popt_common_callback },
{ "option", 0, POPT_ARG_STRING, NULL, OPT_OPTION, "Set smb.conf option from command line", "name=value" },
POPT_TABLEEND
};
/* Handle command line options:
* -U,--user
* -A,--authentication-file
* -k,--use-kerberos
* -N,--no-pass
* -S,--signing
* -P --machine-pass
* -e --encrypt
* -C --use-ccache
*/
static struct user_auth_info *cmdline_auth_info;
struct user_auth_info *popt_get_cmdline_auth_info(void)
{
return cmdline_auth_info;
}
void popt_free_cmdline_auth_info(void)
{
TALLOC_FREE(cmdline_auth_info);
}
static bool popt_common_credentials_ignore_missing_conf;
static bool popt_common_credentials_delay_post;
void popt_common_credentials_set_ignore_missing_conf(void)
{
popt_common_credentials_delay_post = true;
}
void popt_common_credentials_set_delay_post(void)
{
popt_common_credentials_delay_post = true;
}
void popt_common_credentials_post(void)
{
const char *username = NULL;
if (get_cmdline_auth_info_use_machine_account(cmdline_auth_info) &&
!set_cmdline_auth_info_machine_account_creds(cmdline_auth_info))
{
fprintf(stderr,
"Failed to use machine account credentials\n");
exit(1);
}
set_cmdline_auth_info_getpass(cmdline_auth_info);
/*
* When we set the username during the handling of the options passed to
* the binary we haven't loaded the config yet. This means that we
* didnn't take the 'winbind separator' into account.
*
* The username might contain the domain name and thus it hasn't been
* correctly parsed yet. If we have a username we need to set it again
* to run the string parser for the username correctly.
*/
username = get_cmdline_auth_info_username(cmdline_auth_info);
if (username != NULL && username[0] != '\0') {
set_cmdline_auth_info_username(cmdline_auth_info, username);
}
}
static void popt_common_credentials_callback(poptContext con,
enum poptCallbackReason reason,
const struct poptOption *opt,
const char *arg, const void *data)
{
if (reason == POPT_CALLBACK_REASON_PRE) {
struct user_auth_info *auth_info =
user_auth_info_init(NULL);
if (auth_info == NULL) {
fprintf(stderr, "user_auth_info_init() failed\n");
exit(1);
}
cmdline_auth_info = auth_info;
return;
}
if (reason == POPT_CALLBACK_REASON_POST) {
bool ok;
if (override_logfile) {
setup_logging(lp_logfile(talloc_tos()), DEBUG_FILE );
}
ok = lp_load_client(get_dyn_CONFIGFILE());
if (!ok) {
const char *pname = poptGetInvocationName(con);
fprintf(stderr, "%s: Can't load %s - run testparm to debug it\n",
pname, get_dyn_CONFIGFILE());
if (!popt_common_credentials_ignore_missing_conf) {
exit(1);
}
}
load_interfaces();
set_cmdline_auth_info_guess(cmdline_auth_info);
if (popt_common_credentials_delay_post) {
return;
}
popt_common_credentials_post();
return;
}
switch(opt->val) {
case 'U':
set_cmdline_auth_info_username(cmdline_auth_info, arg);
break;
case 'A':
set_cmdline_auth_info_from_file(cmdline_auth_info, arg);
break;
case 'k':
#ifndef HAVE_KRB5
d_printf("No kerberos support compiled in\n");
exit(1);
#else
set_cmdline_auth_info_use_krb5_ticket(cmdline_auth_info);
#endif
break;
case 'S':
if (!set_cmdline_auth_info_signing_state(cmdline_auth_info,
arg)) {
fprintf(stderr, "Unknown signing option %s\n", arg );
exit(1);
}
break;
case 'P':
set_cmdline_auth_info_use_machine_account(cmdline_auth_info);
break;
case 'N':
set_cmdline_auth_info_password(cmdline_auth_info, "");
break;
case 'e':
set_cmdline_auth_info_smb_encrypt(cmdline_auth_info);
break;
case 'C':
set_cmdline_auth_info_use_ccache(cmdline_auth_info, true);
break;
case 'H':
set_cmdline_auth_info_use_pw_nt_hash(cmdline_auth_info, true);
break;
}
}
/**
* @brief Burn the commandline password.
*
* This function removes the password from the command line so we
* don't leak the password e.g. in 'ps aux'.
*
* It should be called after processing the options and you should pass down
* argv from main().
*
* @param[in] argc The number of arguments.
*
* @param[in] argv[] The argument array we will find the array.
*/
void popt_burn_cmdline_password(int argc, char *argv[])
{
bool found = false;
char *p = NULL;
int i, ulen = 0;
for (i = 0; i < argc; i++) {
p = argv[i];
if (strncmp(p, "-U", 2) == 0) {
ulen = 2;
found = true;
} else if (strncmp(p, "--user", 6) == 0) {
ulen = 6;
found = true;
}
if (found) {
if (p == NULL) {
return;
}
if (strlen(p) == ulen) {
continue;
}
p = strchr_m(p, '%');
if (p != NULL) {
memset(p, '\0', strlen(p));
}
found = false;
}
}
}
struct poptOption popt_common_credentials[] = {
{ NULL, 0, POPT_ARG_CALLBACK|POPT_CBFLAG_PRE|POPT_CBFLAG_POST,
(void *)popt_common_credentials_callback, 0, NULL },
{ "user", 'U', POPT_ARG_STRING, NULL, 'U', "Set the network username", "USERNAME" },
{ "no-pass", 'N', POPT_ARG_NONE, NULL, 'N', "Don't ask for a password" },
{ "kerberos", 'k', POPT_ARG_NONE, NULL, 'k', "Use kerberos (active directory) authentication" },
{ "authentication-file", 'A', POPT_ARG_STRING, NULL, 'A', "Get the credentials from a file", "FILE" },
{ "signing", 'S', POPT_ARG_STRING, NULL, 'S', "Set the client signing state", "on|off|required" },
{"machine-pass", 'P', POPT_ARG_NONE, NULL, 'P', "Use stored machine account password" },
{"encrypt", 'e', POPT_ARG_NONE, NULL, 'e', "Encrypt SMB transport" },
{"use-ccache", 'C', POPT_ARG_NONE, NULL, 'C',
"Use the winbind ccache for authentication" },
{"pw-nt-hash", '\0', POPT_ARG_NONE, NULL, 'H',
"The supplied password is the NT hash" },
POPT_TABLEEND
};