/*
main server.
*/
static int binary_smbd_main(const char *binary_name, int argc, const char *argv[])
{
bool opt_daemon = false;
bool opt_interactive = false;
int opt;
poptContext pc;
#define _MODULE_PROTO(init) extern NTSTATUS init(void);
STATIC_service_MODULES_PROTO;
init_module_fn static_init[] = { STATIC_service_MODULES };
init_module_fn *shared_init;
struct tevent_context *event_ctx;
uint16_t stdin_event_flags;
NTSTATUS status;
const char *model = "standard";
int max_runtime = 0;
struct stat st;
enum {
OPT_DAEMON = 1000,
OPT_INTERACTIVE,
OPT_PROCESS_MODEL,
OPT_SHOW_BUILD
};
struct poptOption long_options[] = {
POPT_AUTOHELP
{"daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON,
"Become a daemon (default)", NULL },
{"interactive", 'i', POPT_ARG_NONE, NULL, OPT_INTERACTIVE,
"Run interactive (not a daemon)", NULL},
{"model", 'M', POPT_ARG_STRING, NULL, OPT_PROCESS_MODEL,
"Select process model", "MODEL"},
{"maximum-runtime",0, POPT_ARG_INT, &max_runtime, 0,
"set maximum runtime of the server process, till autotermination", "seconds"},
{"show-build", 'b', POPT_ARG_NONE, NULL, OPT_SHOW_BUILD, "show build info", NULL },
POPT_COMMON_SAMBA
POPT_COMMON_VERSION
{ NULL }
};
pc = poptGetContext(binary_name, argc, argv, long_options, 0);
while((opt = poptGetNextOpt(pc)) != -1) {
switch(opt) {
case OPT_DAEMON:
opt_daemon = true;
break;
case OPT_INTERACTIVE:
opt_interactive = true;
break;
case OPT_PROCESS_MODEL:
model = poptGetOptArg(pc);
break;
case OPT_SHOW_BUILD:
show_build();
break;
default:
fprintf(stderr, "\nInvalid option %s: %s\n\n",
poptBadOption(pc, 0), poptStrerror(opt));
poptPrintUsage(pc, stderr, 0);
return 1;
}
}
if (opt_daemon && opt_interactive) {
fprintf(stderr,"\nERROR: "
"Option -i|--interactive is not allowed together with -D|--daemon\n\n");
poptPrintUsage(pc, stderr, 0);
return 1;
} else if (!opt_interactive) {
/* default is --daemon */
opt_daemon = true;
}
poptFreeContext(pc);
setup_logging(binary_name, opt_interactive?DEBUG_STDOUT:DEBUG_FILE);
setup_signals();
/* we want total control over the permissions on created files,
so set our umask to 0 */
umask(0);
DEBUG(0,("%s version %s started.\n", binary_name, SAMBA_VERSION_STRING));
DEBUGADD(0,("Copyright Andrew Tridgell and the Samba Team 1992-2015\n"));
if (sizeof(uint16_t) < 2 || sizeof(uint32_t) < 4 || sizeof(uint64_t) < 8) {
DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
DEBUGADD(0,("sizeof(uint16_t) = %u, sizeof(uint32_t) %u, sizeof(uint64_t) = %u\n",
(unsigned int)sizeof(uint16_t), (unsigned int)sizeof(uint32_t), (unsigned int)sizeof(uint64_t)));
return 1;
}
if (opt_daemon) {
DEBUG(3,("Becoming a daemon.\n"));
become_daemon(true, false, false);
}
cleanup_tmp_files(cmdline_lp_ctx);
if (!directory_exist(lpcfg_lock_directory(cmdline_lp_ctx))) {
mkdir(lpcfg_lock_directory(cmdline_lp_ctx), 0755);
}
pidfile_create(lpcfg_pid_directory(cmdline_lp_ctx), binary_name);
/* Set up a database to hold a random seed, in case we don't
* have /dev/urandom */
if (!randseed_init(talloc_autofree_context(), cmdline_lp_ctx)) {
return 1;
}
if (lpcfg_server_role(cmdline_lp_ctx) == ROLE_ACTIVE_DIRECTORY_DC) {
if (!open_schannel_session_store(talloc_autofree_context(), cmdline_lp_ctx)) {
exit_daemon("Samba cannot open schannel store for secured NETLOGON operations.", EACCES);
}
}
/* make sure we won't go through nss_winbind */
if (!winbind_off()) {
exit_daemon("Samba failed to disable recusive winbindd calls.", EACCES);
}
gensec_init(); /* FIXME: */
ntptr_init(); /* FIXME: maybe run this in the initialization function
of the spoolss RPC server instead? */
ntvfs_init(cmdline_lp_ctx); /* FIXME: maybe run this in the initialization functions
of the SMB[,2] server instead? */
process_model_init(cmdline_lp_ctx);
shared_init = load_samba_modules(NULL, "service");
run_init_functions(static_init);
run_init_functions(shared_init);
talloc_free(shared_init);
/* the event context is the top level structure in smbd. Everything else
should hang off that */
event_ctx = s4_event_context_init(talloc_autofree_context());
if (event_ctx == NULL) {
exit_daemon("Initializing event context failed", EACCES);
}
if (opt_interactive) {
/* terminate when stdin goes away */
stdin_event_flags = TEVENT_FD_READ;
} else {
/* stay alive forever */
stdin_event_flags = 0;
}
/* catch EOF on stdin */
#ifdef SIGTTIN
signal(SIGTTIN, SIG_IGN);
#endif
if (fstat(0, &st) != 0) {
exit_daemon("Samba failed to set standard input handler", ENOTTY);
}
if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode)) {
tevent_add_fd(event_ctx,
event_ctx,
0,
stdin_event_flags,
server_stdin_handler,
discard_const(binary_name));
}
if (max_runtime) {
DEBUG(0,("Called with maxruntime %d - current ts %llu\n",
max_runtime, (unsigned long long) time(NULL)));
tevent_add_timer(event_ctx, event_ctx,
timeval_current_ofs(max_runtime, 0),
max_runtime_handler,
discard_const(binary_name));
}
if (lpcfg_server_role(cmdline_lp_ctx) != ROLE_ACTIVE_DIRECTORY_DC
&& !lpcfg_parm_bool(cmdline_lp_ctx, NULL, "server role check", "inhibit", false)
&& !str_list_check_ci(lpcfg_server_services(cmdline_lp_ctx), "smb")
&& !str_list_check_ci(lpcfg_dcerpc_endpoint_servers(cmdline_lp_ctx), "remote")
&& !str_list_check_ci(lpcfg_dcerpc_endpoint_servers(cmdline_lp_ctx), "mapiproxy")) {
DEBUG(0, ("At this time the 'samba' binary should only be used for either:\n"));
DEBUGADD(0, ("'server role = active directory domain controller' or to access the ntvfs file server with 'server services = +smb' or the rpc proxy with 'dcerpc endpoint servers = remote'\n"));
DEBUGADD(0, ("You should start smbd/nmbd/winbindd instead for domain member and standalone file server tasks\n"));
exit_daemon("Samba detected misconfigured 'server role' and exited. Check logs for details", EINVAL);
};
prime_ldb_databases(event_ctx);
status = setup_parent_messaging(event_ctx, cmdline_lp_ctx);
if (!NT_STATUS_IS_OK(status)) {
exit_daemon("Samba failed to setup parent messaging", NT_STATUS_V(status));
}
DEBUG(0,("%s: using '%s' process model\n", binary_name, model));
status = server_service_startup(event_ctx, cmdline_lp_ctx, model,
lpcfg_server_services(cmdline_lp_ctx));
if (!NT_STATUS_IS_OK(status)) {
exit_daemon("Samba failed to start services", NT_STATUS_V(status));
}
if (opt_daemon) {
daemon_ready("samba");
}
/* wait for events - this is where smbd sits for most of its
life */
tevent_loop_wait(event_ctx);
/* as everything hangs off this event context, freeing it
should initiate a clean shutdown of all services */
talloc_free(event_ctx);
return 0;
}
/**
* Fill in credentials for the machine trust account, from the
* secrets.ldb or passed in handle to secrets.tdb (perhaps in CTDB).
*
* This version is used in parts of the code that can link in the
* CTDB dbwrap backend, by passing down the already open handle.
*
* @param cred Credentials structure to fill in
* @param db_ctx dbwrap context for secrets.tdb
* @retval NTSTATUS error detailing any failure
*/
_PUBLIC_ NTSTATUS cli_credentials_set_machine_account_db_ctx(struct cli_credentials *cred,
struct loadparm_context *lp_ctx,
struct db_context *db_ctx)
{
NTSTATUS status;
char *filter;
char *error_string = NULL;
const char *domain;
bool secrets_tdb_password_more_recent;
time_t secrets_tdb_lct = 0;
char *secrets_tdb_password = NULL;
char *secrets_tdb_old_password = NULL;
uint32_t secrets_tdb_secure_channel_type = SEC_CHAN_NULL;
int server_role = lpcfg_server_role(lp_ctx);
int security = lpcfg_security(lp_ctx);
char *keystr;
char *keystr_upper = NULL;
TALLOC_CTX *tmp_ctx = talloc_named(cred, 0, "cli_credentials_set_secrets from ldb");
if (!tmp_ctx) {
return NT_STATUS_NO_MEMORY;
}
/* Bleh, nasty recursion issues: We are setting a machine
* account here, so we don't want the 'pending' flag around
* any more */
cred->machine_account_pending = false;
/* We have to do this, as the fallback in
* cli_credentials_set_secrets is to run as anonymous, so the domain is wiped */
domain = cli_credentials_get_domain(cred);
if (db_ctx) {
TDB_DATA dbuf;
keystr = talloc_asprintf(tmp_ctx, "%s/%s",
SECRETS_MACHINE_LAST_CHANGE_TIME,
domain);
keystr_upper = strupper_talloc(tmp_ctx, keystr);
status = dbwrap_fetch(db_ctx, tmp_ctx, string_tdb_data(keystr_upper),
&dbuf);
if (NT_STATUS_IS_OK(status) && dbuf.dsize == 4) {
secrets_tdb_lct = IVAL(dbuf.dptr,0);
}
keystr = talloc_asprintf(tmp_ctx, "%s/%s",
SECRETS_MACHINE_PASSWORD,
domain);
keystr_upper = strupper_talloc(tmp_ctx, keystr);
status = dbwrap_fetch(db_ctx, tmp_ctx, string_tdb_data(keystr_upper),
&dbuf);
if (NT_STATUS_IS_OK(status)) {
secrets_tdb_password = (char *)dbuf.dptr;
}
keystr = talloc_asprintf(tmp_ctx, "%s/%s",
SECRETS_MACHINE_PASSWORD_PREV,
domain);
keystr_upper = strupper_talloc(tmp_ctx, keystr);
status = dbwrap_fetch(db_ctx, tmp_ctx, string_tdb_data(keystr_upper),
&dbuf);
if (NT_STATUS_IS_OK(status)) {
secrets_tdb_old_password = (char *)dbuf.dptr;
}
keystr = talloc_asprintf(tmp_ctx, "%s/%s",
SECRETS_MACHINE_SEC_CHANNEL_TYPE,
domain);
keystr_upper = strupper_talloc(tmp_ctx, keystr);
status = dbwrap_fetch(db_ctx, tmp_ctx, string_tdb_data(keystr_upper),
&dbuf);
if (NT_STATUS_IS_OK(status) && dbuf.dsize == 4) {
secrets_tdb_secure_channel_type = IVAL(dbuf.dptr,0);
}
}
filter = talloc_asprintf(cred, SECRETS_PRIMARY_DOMAIN_FILTER,
domain);
status = cli_credentials_set_secrets_lct(cred, lp_ctx, NULL,
SECRETS_PRIMARY_DOMAIN_DN,
filter, secrets_tdb_lct, secrets_tdb_password, &error_string);
if (secrets_tdb_password == NULL) {
secrets_tdb_password_more_recent = false;
} else if (NT_STATUS_EQUAL(NT_STATUS_CANT_ACCESS_DOMAIN_INFO, status)
|| NT_STATUS_EQUAL(NT_STATUS_NOT_FOUND, status)) {
secrets_tdb_password_more_recent = true;
} else if (secrets_tdb_lct > cli_credentials_get_password_last_changed_time(cred)) {
secrets_tdb_password_more_recent = true;
} else if (secrets_tdb_lct == cli_credentials_get_password_last_changed_time(cred)) {
secrets_tdb_password_more_recent = strcmp(secrets_tdb_password, cli_credentials_get_password(cred)) != 0;
} else {
secrets_tdb_password_more_recent = false;
}
if (secrets_tdb_password_more_recent) {
enum credentials_use_kerberos use_kerberos = CRED_DONT_USE_KERBEROS;
char *machine_account = talloc_asprintf(tmp_ctx, "%s$", lpcfg_netbios_name(lp_ctx));
cli_credentials_set_password(cred, secrets_tdb_password, CRED_SPECIFIED);
cli_credentials_set_old_password(cred, secrets_tdb_old_password, CRED_SPECIFIED);
cli_credentials_set_domain(cred, domain, CRED_SPECIFIED);
if (strequal(domain, lpcfg_workgroup(lp_ctx))) {
cli_credentials_set_realm(cred, lpcfg_realm(lp_ctx), CRED_SPECIFIED);
switch (server_role) {
case ROLE_DOMAIN_MEMBER:
if (security != SEC_ADS) {
break;
}
FALL_THROUGH;
case ROLE_ACTIVE_DIRECTORY_DC:
use_kerberos = CRED_AUTO_USE_KERBEROS;
break;
}
}
cli_credentials_set_kerberos_state(cred, use_kerberos);
cli_credentials_set_username(cred, machine_account, CRED_SPECIFIED);
cli_credentials_set_password_last_changed_time(cred, secrets_tdb_lct);
cli_credentials_set_secure_channel_type(cred, secrets_tdb_secure_channel_type);
status = NT_STATUS_OK;
} else if (!NT_STATUS_IS_OK(status)) {
if (db_ctx) {
error_string
= talloc_asprintf(cred,
"Failed to fetch machine account password for %s from both "
"secrets.ldb (%s) and from %s",
domain,
error_string == NULL ? "error" : error_string,
dbwrap_name(db_ctx));
} else {
char *secrets_tdb_path;
secrets_tdb_path = lpcfg_private_db_path(tmp_ctx,
lp_ctx,
"secrets");
if (secrets_tdb_path == NULL) {
return NT_STATUS_NO_MEMORY;
}
error_string = talloc_asprintf(cred,
"Failed to fetch machine account password from "
"secrets.ldb: %s and failed to open %s",
error_string == NULL ? "error" : error_string,
secrets_tdb_path);
}
DEBUG(1, ("Could not find machine account in secrets database: %s: %s\n",
error_string == NULL ? "error" : error_string,
nt_errstr(status)));
/* set anonymous as the fallback, if the machine account won't work */
cli_credentials_set_anonymous(cred);
}
TALLOC_FREE(tmp_ctx);
return status;
}
/**
* Start NTLMSSP on the server side
*
*/
NTSTATUS gensec_ntlmssp_server_start(struct gensec_security *gensec_security)
{
NTSTATUS nt_status;
struct ntlmssp_state *ntlmssp_state;
struct gensec_ntlmssp_context *gensec_ntlmssp;
nt_status = gensec_ntlmssp_start(gensec_security);
NT_STATUS_NOT_OK_RETURN(nt_status);
gensec_ntlmssp = talloc_get_type_abort(gensec_security->private_data,
struct gensec_ntlmssp_context);
ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
ntlmssp_state->role = NTLMSSP_SERVER;
ntlmssp_state->expected_state = NTLMSSP_NEGOTIATE;
ntlmssp_state->allow_lm_key = (lpcfg_lanman_auth(gensec_security->settings->lp_ctx)
&& gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "allow_lm_key", false));
ntlmssp_state->neg_flags =
NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_VERSION;
ntlmssp_state->lm_resp = data_blob(NULL, 0);
ntlmssp_state->nt_resp = data_blob(NULL, 0);
if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "128bit", true)) {
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_128;
}
if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "56bit", true)) {
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_56;
}
if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "keyexchange", true)) {
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_KEY_EXCH;
}
if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "alwayssign", true)) {
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
}
if (gensec_setting_bool(gensec_security->settings, "ntlmssp_server", "ntlm2", true)) {
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2;
}
if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
}
if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
}
gensec_ntlmssp->auth_context = gensec_security->auth_context;
ntlmssp_state->get_challenge = auth_ntlmssp_get_challenge;
ntlmssp_state->may_set_challenge = auth_ntlmssp_may_set_challenge;
ntlmssp_state->set_challenge = auth_ntlmssp_set_challenge;
ntlmssp_state->check_password = auth_ntlmssp_check_password;
if (lpcfg_server_role(gensec_security->settings->lp_ctx) == ROLE_STANDALONE) {
ntlmssp_state->server.is_standalone = true;
} else {
ntlmssp_state->server.is_standalone = false;
}
ntlmssp_state->server.netbios_name = lpcfg_netbios_name(gensec_security->settings->lp_ctx);
ntlmssp_state->server.netbios_domain = lpcfg_workgroup(gensec_security->settings->lp_ctx);
{
const char *dnsdomain = lpcfg_dnsdomain(gensec_security->settings->lp_ctx);
char *dnsname, *lower_netbiosname;
lower_netbiosname = strlower_talloc(ntlmssp_state, ntlmssp_state->server.netbios_name);
/* Find out the DNS host name */
if (dnsdomain && dnsdomain[0] != '\0') {
dnsname = talloc_asprintf(ntlmssp_state, "%s.%s",
lower_netbiosname,
dnsdomain);
talloc_free(lower_netbiosname);
ntlmssp_state->server.dns_name = dnsname;
} else {
ntlmssp_state->server.dns_name = lower_netbiosname;
}
NT_STATUS_HAVE_NO_MEMORY(ntlmssp_state->server.dns_name);
ntlmssp_state->server.dns_domain
= talloc_strdup(ntlmssp_state,
lpcfg_dnsdomain(gensec_security->settings->lp_ctx));
NT_STATUS_HAVE_NO_MEMORY(ntlmssp_state->server.dns_domain);
}
return NT_STATUS_OK;
}
