/*
* sam_create_trust_account
*
* Create a trust account for this system.
*
* SAMR_AF_WORKSTATION_TRUST_ACCOUNT: servers and workstations.
* SAMR_AF_SERVER_TRUST_ACCOUNT: domain controllers.
*
* Returns NT status codes.
*/
DWORD
sam_create_trust_account(char *server, char *domain)
{
char account_name[SMB_SAMACCT_MAXLEN];
DWORD status;
if (smb_getsamaccount(account_name, SMB_SAMACCT_MAXLEN) != 0)
return (NT_STATUS_INTERNAL_ERROR);
/*
* The trust account value here should match
* the value that will be used when the user
* information is set on this account.
*/
status = sam_create_account(server, domain, account_name,
SAMR_AF_WORKSTATION_TRUST_ACCOUNT);
/*
* Based on network traces, a Windows 2000 client will
* always try to create the computer account first.
* If it existed, then check the user permission to join
* the domain.
*/
if (status == NT_STATUS_USER_EXISTS)
status = sam_check_user(server, domain, account_name);
return (status);
}
/*
* Save the host credentials to be used for authenticated IPC.
* The credentials are also saved to the original IPC info as
* rollback data in case the join domain process fails later.
*/
void
smb_ipc_commit(void)
{
(void) rw_wrlock(&smb_ipc_lock);
(void) smb_getsamaccount(ipc_info.user, SMB_USERNAME_MAXLEN);
(void) smb_get_machine_passwd(ipc_info.passwd, SMBAUTH_HASH_SZ);
(void) memcpy(&ipc_orig_info, &ipc_info, sizeof (smb_ipc_t));
(void) rw_unlock(&smb_ipc_lock);
}
/*
* sam_remove_trust_account
*
* Attempt to remove the workstation trust account for this system.
* Administrator access is required to perform this operation.
*
* Returns NT status codes.
*/
DWORD
sam_remove_trust_account(char *server, char *domain)
{
char account_name[SMB_SAMACCT_MAXLEN];
if (smb_getsamaccount(account_name, SMB_SAMACCT_MAXLEN) != 0)
return (NT_STATUS_INTERNAL_ERROR);
return (sam_delete_account(server, domain, account_name));
}
/*
* Set up IPC connection credentials.
*/
void
smb_ipc_init(void)
{
int rc;
(void) rw_wrlock(&smb_ipc_lock);
bzero(&ipc_info, sizeof (smb_ipc_t));
bzero(&ipc_orig_info, sizeof (smb_ipc_t));
(void) smb_getsamaccount(ipc_info.user, SMB_USERNAME_MAXLEN);
rc = smb_get_machine_passwd(ipc_info.passwd, SMBAUTH_HASH_SZ);
if (rc != 0)
*ipc_info.passwd = 0;
(void) rw_unlock(&smb_ipc_lock);
}
/*
* Join the specified domain. The method varies depending on whether
* we're using "secure join" (using an administrative account to join)
* or "unsecure join" (using a pre-created machine account). In the
* latter case, the machine account is created "by hand" before this
* machine attempts to join, and we just change the password from the
* (weak) default password for a new machine account to a random one.
*
* Returns NT status codes.
*/
void
mlsvc_join(smb_joininfo_t *info, smb_joinres_t *res)
{
static unsigned char zero_hash[SMBAUTH_HASH_SZ];
char machine_name[SMB_SAMACCT_MAXLEN];
char machine_pw[NETR_MACHINE_ACCT_PASSWD_MAX];
unsigned char passwd_hash[SMBAUTH_HASH_SZ];
smb_domainex_t dxi;
smb_domain_t *di = &dxi.d_primary;
DWORD status;
int rc;
bzero(&dxi, sizeof (dxi));
/*
* Domain join support: AD (Kerberos+LDAP) or MS-RPC?
*/
boolean_t ads_enabled = smb_config_get_ads_enable();
if (smb_getsamaccount(machine_name, sizeof (machine_name)) != 0) {
res->status = NT_STATUS_INVALID_COMPUTER_NAME;
return;
}
(void) smb_gen_random_passwd(machine_pw, sizeof (machine_pw));
/*
* Ensure that any previous membership of this domain has
* been cleared from the environment before we start. This
* will ensure that we don't attempt a NETLOGON_SAMLOGON
* when attempting to find the PDC.
*/
(void) smb_config_setbool(SMB_CI_DOMAIN_MEMB, B_FALSE);
if (info->domain_username[0] != '\0') {
(void) smb_auth_ntlm_hash(info->domain_passwd, passwd_hash);
smb_ipc_set(info->domain_username, passwd_hash);
} else {
smb_ipc_set(MLSVC_ANON_USER, zero_hash);
}
/*
* Tentatively set the idmap domain to the one we're joining,
* so that the DC locator in idmap knows what to look for.
* Ditto the SMB server domain.
*/
if (smb_config_set_idmap_domain(info->domain_name) != 0)
syslog(LOG_NOTICE, "Failed to set idmap domain name");
if (smb_config_refresh_idmap() != 0)
syslog(LOG_NOTICE, "Failed to refresh idmap service");
/* Clear DNS local (ADS) lookup cache. */
smb_ads_refresh(B_FALSE);
/*
* Locate a DC for this domain. Intentionally bypass the
* ddiscover service here because we're still joining.
* This also allows better reporting of any failures.
*/
status = smb_ads_lookup_msdcs(info->domain_name, &dxi.d_dci);
if (status != NT_STATUS_SUCCESS) {
syslog(LOG_ERR,
"smbd: failed to locate AD server for domain %s (%s)",
info->domain_name, xlate_nt_status(status));
goto out;
}
/*
* Found a DC. Report what we found along with the return status
* so that admin will know which AD server we were talking to.
*/
(void) strlcpy(res->dc_name, dxi.d_dci.dc_name, MAXHOSTNAMELEN);
syslog(LOG_INFO, "smbd: found AD server %s", dxi.d_dci.dc_name);
/*
* Domain discovery needs to authenticate with the AD server.
* Disconnect any existing connection with the domain controller
* to make sure we won't use any prior authentication context
* our redirector might have.
*/
mlsvc_disconnect(dxi.d_dci.dc_name);
/*
* Get the domain policy info (domain SID etc).
* Here too, bypass the smb_ddiscover_service.
*/
status = smb_ddiscover_main(info->domain_name, &dxi);
if (status != NT_STATUS_SUCCESS) {
syslog(LOG_ERR,
"smbd: failed getting domain info for %s (%s)",
info->domain_name, xlate_nt_status(status));
goto out;
}
/*
* After a successful smbd_ddiscover_main() call
* we should call smb_domain_save() to update the
* data shown by smbadm list. Do that at the end,
* only if all goes well with joining the domain.
*/
/*
* Create or update our machine account on the DC.
* A non-null user means we do "secure join".
*/
if (info->domain_username[0] != '\0') {
/*
* If enabled, try to join using AD Services.
*/
status = NT_STATUS_UNSUCCESSFUL;
if (ads_enabled) {
res->join_err = smb_ads_join(di->di_fqname,
info->domain_username, info->domain_passwd,
machine_pw);
if (res->join_err == SMB_ADS_SUCCESS) {
status = NT_STATUS_SUCCESS;
}
} else {
syslog(LOG_DEBUG, "use_ads=false (do RPC join)");
/*
* If ADS was disabled, join using RPC.
*/
status = mlsvc_join_rpc(&dxi,
info->domain_username,
info->domain_passwd,
machine_name, machine_pw);
}
} else {
/*
* Doing "Unsecure join" (pre-created account)
*/
status = mlsvc_join_noauth(&dxi, machine_name, machine_pw);
}
if (status != NT_STATUS_SUCCESS)
goto out;
/*
* Make sure we can authenticate using the
* (new, or updated) machine account.
*/
(void) smb_auth_ntlm_hash(machine_pw, passwd_hash);
smb_ipc_set(machine_name, passwd_hash);
rc = smbrdr_logon(dxi.d_dci.dc_name, di->di_nbname, machine_name);
if (rc != 0) {
syslog(LOG_NOTICE, "Authenticate with "
"new/updated machine account: %s",
strerror(rc));
res->join_err = SMB_ADJOIN_ERR_AUTH_NETLOGON;
status = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
goto out;
}
/*
* Store the new machine account password, and
* SMB_CI_DOMAIN_MEMB etc.
*/
rc = smb_setdomainprops(NULL, dxi.d_dci.dc_name, machine_pw);
if (rc != 0) {
syslog(LOG_NOTICE,
"Failed to save machine account password");
res->join_err = SMB_ADJOIN_ERR_STORE_PROPS;
status = NT_STATUS_INTERNAL_DB_ERROR;
goto out;
}
/*
* Update idmap config?
* Already set the domain_name above.
*/
/*
* Save the SMB server config. Sets: SMB_CI_DOMAIN_*
* Should unify SMB vs idmap configs.
*/
smb_config_setdomaininfo(di->di_nbname, di->di_fqname,
di->di_sid,
di->di_u.di_dns.ddi_forest,
di->di_u.di_dns.ddi_guid);
smb_ipc_commit();
smb_domain_save();
status = 0;
out:
if (status != 0) {
/*
* Undo the tentative domain settings.
*/
(void) smb_config_set_idmap_domain("");
(void) smb_config_refresh_idmap();
smb_ipc_rollback();
}
/* Avoid leaving cleartext passwords around. */
bzero(machine_pw, sizeof (machine_pw));
bzero(passwd_hash, sizeof (passwd_hash));
res->status = status;
}
