NTSTATUS cli_nt_setup_netsec(struct cli_state *cli, int sec_chan, int auth_flags,
const uchar trust_password[16])
{
NTSTATUS result;
uint32 neg_flags = NETLOGON_NEG_AUTH2_FLAGS;
cli->pipe_auth_flags = 0;
if (lp_client_schannel() == False) {
return NT_STATUS_OK;
}
if (!cli_nt_session_open(cli, PI_NETLOGON)) {
DEBUG(0, ("Could not initialise %s\n",
get_pipe_name_from_index(PI_NETLOGON)));
return NT_STATUS_UNSUCCESSFUL;
}
if (lp_client_schannel() != False)
neg_flags |= NETLOGON_NEG_SCHANNEL;
neg_flags |= NETLOGON_NEG_SCHANNEL;
result = cli_nt_setup_creds(cli, sec_chan, trust_password,
&neg_flags, 2);
if (!(neg_flags & NETLOGON_NEG_SCHANNEL)
&& lp_client_schannel() == True) {
DEBUG(1, ("Could not negotiate SCHANNEL with the DC!\n"));
result = NT_STATUS_UNSUCCESSFUL;
}
if (!NT_STATUS_IS_OK(result)) {
ZERO_STRUCT(cli->auth_info.sess_key);
ZERO_STRUCT(cli->sess_key);
cli->pipe_auth_flags = 0;
cli_nt_session_close(cli);
return result;
}
memcpy(cli->auth_info.sess_key, cli->sess_key,
sizeof(cli->auth_info.sess_key));
cli->saved_netlogon_pipe_fnum = cli->nt_pipe_fnum;
cli->nt_pipe_fnum = 0;
/* doing schannel, not per-user auth */
cli->pipe_auth_flags = auth_flags;
return NT_STATUS_OK;
}
/**
* confirm that a domain join is still valid
*
* @return A shell status integer (0 for success)
*
**/
NTSTATUS net_rpc_join_ok(struct net_context *c, const char *domain,
const char *server, struct sockaddr_storage *pss)
{
enum security_types sec;
unsigned int conn_flags = NET_FLAGS_PDC;
uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
struct cli_state *cli = NULL;
struct rpc_pipe_client *pipe_hnd = NULL;
struct rpc_pipe_client *netlogon_pipe = NULL;
NTSTATUS ntret = NT_STATUS_UNSUCCESSFUL;
sec = (enum security_types)lp_security();
if (sec == SEC_ADS) {
/* Connect to IPC$ using machine account's credentials. We don't use anonymous
connection here, as it may be denied by server's local policy. */
net_use_machine_account(c);
} else {
/* some servers (e.g. WinNT) don't accept machine-authenticated
smb connections */
conn_flags |= NET_FLAGS_ANONYMOUS;
}
/* Connect to remote machine */
ntret = net_make_ipc_connection_ex(c, domain, server, pss, conn_flags,
&cli);
if (!NT_STATUS_IS_OK(ntret)) {
return ntret;
}
/* Setup the creds as though we're going to do schannel... */
ntret = get_schannel_session_key(cli, domain, &neg_flags,
&netlogon_pipe);
/* We return NT_STATUS_INVALID_NETWORK_RESPONSE if the server is refusing
to negotiate schannel, but the creds were set up ok. That'll have to do. */
if (!NT_STATUS_IS_OK(ntret)) {
if (NT_STATUS_EQUAL(ntret, NT_STATUS_INVALID_NETWORK_RESPONSE)) {
cli_shutdown(cli);
return NT_STATUS_OK;
} else {
DEBUG(0,("net_rpc_join_ok: failed to get schannel session "
"key from server %s for domain %s. Error was %s\n",
cli->desthost, domain, nt_errstr(ntret) ));
cli_shutdown(cli);
return ntret;
}
}
/* Only do the rest of the schannel test if the client is allowed to do this. */
if (!lp_client_schannel()) {
cli_shutdown(cli);
/* We're good... */
return ntret;
}
ntret = cli_rpc_pipe_open_schannel_with_key(
cli, &ndr_table_netlogon.syntax_id, NCACN_NP,
DCERPC_AUTH_LEVEL_PRIVACY,
domain, &netlogon_pipe->dc, &pipe_hnd);
if (!NT_STATUS_IS_OK(ntret)) {
DEBUG(0,("net_rpc_join_ok: failed to open schannel session "
"on netlogon pipe to server %s for domain %s. Error was %s\n",
cli->desthost, domain, nt_errstr(ntret) ));
/*
* Note: here, we have:
* (pipe_hnd != NULL) if and only if NT_STATUS_IS_OK(ntret)
*/
}
cli_shutdown(cli);
return ntret;
}
int net_rpc_join_newstyle(struct net_context *c, int argc, const char **argv)
{
/* libsmb variables */
struct cli_state *cli;
TALLOC_CTX *mem_ctx;
uint32 acb_info = ACB_WSTRUST;
uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
enum netr_SchannelType sec_channel_type;
struct rpc_pipe_client *pipe_hnd = NULL;
struct dcerpc_binding_handle *b = NULL;
/* rpc variables */
struct policy_handle lsa_pol, sam_pol, domain_pol, user_pol;
struct dom_sid *domain_sid;
uint32 user_rid;
/* Password stuff */
char *clear_trust_password = NULL;
struct samr_CryptPassword crypt_pwd;
uchar md4_trust_password[16];
union samr_UserInfo set_info;
/* Misc */
NTSTATUS status, result;
int retval = 1;
const char *domain = NULL;
char *acct_name;
struct lsa_String lsa_acct_name;
uint32 acct_flags=0;
uint32_t access_granted = 0;
union lsa_PolicyInformation *info = NULL;
struct samr_Ids user_rids;
struct samr_Ids name_types;
/* check what type of join */
if (argc >= 0) {
sec_channel_type = get_sec_channel_type(argv[0]);
} else {
sec_channel_type = get_sec_channel_type(NULL);
}
switch (sec_channel_type) {
case SEC_CHAN_WKSTA:
acb_info = ACB_WSTRUST;
break;
case SEC_CHAN_BDC:
acb_info = ACB_SVRTRUST;
break;
#if 0
case SEC_CHAN_DOMAIN:
acb_info = ACB_DOMTRUST;
break;
#endif
default:
DEBUG(0,("secure channel type %d not yet supported\n",
sec_channel_type));
break;
}
/* Make authenticated connection to remote machine */
status = net_make_ipc_connection(c, NET_FLAGS_PDC, &cli);
if (!NT_STATUS_IS_OK(status)) {
return 1;
}
if (!(mem_ctx = talloc_init("net_rpc_join_newstyle"))) {
DEBUG(0, ("Could not initialise talloc context\n"));
goto done;
}
/* Fetch domain sid */
status = cli_rpc_pipe_open_noauth(cli, &ndr_table_lsarpc.syntax_id,
&pipe_hnd);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Error connecting to LSA pipe. Error was %s\n",
nt_errstr(status) ));
goto done;
}
b = pipe_hnd->binding_handle;
CHECK_RPC_ERR(rpccli_lsa_open_policy(pipe_hnd, mem_ctx, true,
SEC_FLAG_MAXIMUM_ALLOWED,
&lsa_pol),
"error opening lsa policy handle");
CHECK_DCERPC_ERR(dcerpc_lsa_QueryInfoPolicy(b, mem_ctx,
&lsa_pol,
LSA_POLICY_INFO_ACCOUNT_DOMAIN,
&info,
&result),
"error querying info policy");
domain = info->account_domain.name.string;
domain_sid = info->account_domain.sid;
dcerpc_lsa_Close(b, mem_ctx, &lsa_pol, &result);
TALLOC_FREE(pipe_hnd); /* Done with this pipe */
/* Bail out if domain didn't get set. */
if (!domain) {
DEBUG(0, ("Could not get domain name.\n"));
goto done;
}
/* Create domain user */
status = cli_rpc_pipe_open_noauth(cli, &ndr_table_samr.syntax_id,
&pipe_hnd);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Error connecting to SAM pipe. Error was %s\n",
nt_errstr(status) ));
goto done;
}
b = pipe_hnd->binding_handle;
CHECK_DCERPC_ERR(dcerpc_samr_Connect2(b, mem_ctx,
pipe_hnd->desthost,
SAMR_ACCESS_ENUM_DOMAINS
| SAMR_ACCESS_LOOKUP_DOMAIN,
&sam_pol,
&result),
"could not connect to SAM database");
CHECK_DCERPC_ERR(dcerpc_samr_OpenDomain(b, mem_ctx,
&sam_pol,
SAMR_DOMAIN_ACCESS_LOOKUP_INFO_1
| SAMR_DOMAIN_ACCESS_CREATE_USER
| SAMR_DOMAIN_ACCESS_OPEN_ACCOUNT,
domain_sid,
&domain_pol,
&result),
"could not open domain");
/* Create domain user */
if ((acct_name = talloc_asprintf(mem_ctx, "%s$", global_myname())) == NULL) {
status = NT_STATUS_NO_MEMORY;
goto done;
}
strlower_m(acct_name);
init_lsa_String(&lsa_acct_name, acct_name);
acct_flags = SEC_GENERIC_READ | SEC_GENERIC_WRITE | SEC_GENERIC_EXECUTE |
SEC_STD_WRITE_DAC | SEC_STD_DELETE |
SAMR_USER_ACCESS_SET_PASSWORD |
SAMR_USER_ACCESS_GET_ATTRIBUTES |
SAMR_USER_ACCESS_SET_ATTRIBUTES;
DEBUG(10, ("Creating account with flags: %d\n",acct_flags));
status = dcerpc_samr_CreateUser2(b, mem_ctx,
&domain_pol,
&lsa_acct_name,
acb_info,
acct_flags,
&user_pol,
&access_granted,
&user_rid,
&result);
if (!NT_STATUS_IS_OK(status)) {
goto done;
}
if (!NT_STATUS_IS_OK(result) &&
!NT_STATUS_EQUAL(result, NT_STATUS_USER_EXISTS)) {
status = result;
d_fprintf(stderr,_("Creation of workstation account failed\n"));
/* If NT_STATUS_ACCESS_DENIED then we have a valid
username/password combo but the user does not have
administrator access. */
if (NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED))
d_fprintf(stderr, _("User specified does not have "
"administrator privileges\n"));
goto done;
}
/* We *must* do this.... don't ask... */
if (NT_STATUS_IS_OK(result)) {
dcerpc_samr_Close(b, mem_ctx, &user_pol, &result);
}
CHECK_DCERPC_ERR_DEBUG(dcerpc_samr_LookupNames(b, mem_ctx,
&domain_pol,
1,
&lsa_acct_name,
&user_rids,
&name_types,
&result),
("error looking up rid for user %s: %s/%s\n",
acct_name, nt_errstr(status), nt_errstr(result)));
if (user_rids.count != 1) {
status = NT_STATUS_INVALID_NETWORK_RESPONSE;
goto done;
}
if (name_types.count != 1) {
status = NT_STATUS_INVALID_NETWORK_RESPONSE;
goto done;
}
if (name_types.ids[0] != SID_NAME_USER) {
DEBUG(0, ("%s is not a user account (type=%d)\n", acct_name, name_types.ids[0]));
goto done;
}
user_rid = user_rids.ids[0];
/* Open handle on user */
CHECK_DCERPC_ERR_DEBUG(
dcerpc_samr_OpenUser(b, mem_ctx,
&domain_pol,
SEC_FLAG_MAXIMUM_ALLOWED,
user_rid,
&user_pol,
&result),
("could not re-open existing user %s: %s/%s\n",
acct_name, nt_errstr(status), nt_errstr(result)));
/* Create a random machine account password */
clear_trust_password = generate_random_str(talloc_tos(), DEFAULT_TRUST_ACCOUNT_PASSWORD_LENGTH);
E_md4hash(clear_trust_password, md4_trust_password);
/* Set password on machine account */
init_samr_CryptPassword(clear_trust_password,
&cli->user_session_key,
&crypt_pwd);
set_info.info24.password = crypt_pwd;
set_info.info24.password_expired = PASS_DONT_CHANGE_AT_NEXT_LOGON;
CHECK_DCERPC_ERR(dcerpc_samr_SetUserInfo2(b, mem_ctx,
&user_pol,
24,
&set_info,
&result),
"error setting trust account password");
/* Why do we have to try to (re-)set the ACB to be the same as what
we passed in the samr_create_dom_user() call? When a NT
workstation is joined to a domain by an administrator the
acb_info is set to 0x80. For a normal user with "Add
workstations to the domain" rights the acb_info is 0x84. I'm
not sure whether it is supposed to make a difference or not. NT
seems to cope with either value so don't bomb out if the set
userinfo2 level 0x10 fails. -tpot */
set_info.info16.acct_flags = acb_info;
/* Ignoring the return value is necessary for joining a domain
as a normal user with "Add workstation to domain" privilege. */
status = dcerpc_samr_SetUserInfo(b, mem_ctx,
&user_pol,
16,
&set_info,
&result);
dcerpc_samr_Close(b, mem_ctx, &user_pol, &result);
TALLOC_FREE(pipe_hnd); /* Done with this pipe */
/* Now check the whole process from top-to-bottom */
status = cli_rpc_pipe_open_noauth(cli, &ndr_table_netlogon.syntax_id,
&pipe_hnd);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("Error connecting to NETLOGON pipe. Error was %s\n",
nt_errstr(status) ));
goto done;
}
status = rpccli_netlogon_setup_creds(pipe_hnd,
cli->desthost, /* server name */
domain, /* domain */
global_myname(), /* client name */
global_myname(), /* machine account name */
md4_trust_password,
sec_channel_type,
&neg_flags);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Error in domain join verification (credential setup failed): %s\n\n",
nt_errstr(status)));
if ( NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
(sec_channel_type == SEC_CHAN_BDC) ) {
d_fprintf(stderr, _("Please make sure that no computer "
"account\nnamed like this machine "
"(%s) exists in the domain\n"),
global_myname());
}
goto done;
}
/* We can only check the schannel connection if the client is allowed
to do this and the server supports it. If not, just assume success
(after all the rpccli_netlogon_setup_creds() succeeded, and we'll
do the same again (setup creds) in net_rpc_join_ok(). JRA. */
if (lp_client_schannel() && (neg_flags & NETLOGON_NEG_SCHANNEL)) {
struct rpc_pipe_client *netlogon_schannel_pipe;
status = cli_rpc_pipe_open_schannel_with_key(
cli, &ndr_table_netlogon.syntax_id, NCACN_NP,
DCERPC_AUTH_LEVEL_PRIVACY, domain, &pipe_hnd->dc,
&netlogon_schannel_pipe);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Error in domain join verification (schannel setup failed): %s\n\n",
nt_errstr(status)));
if ( NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
(sec_channel_type == SEC_CHAN_BDC) ) {
d_fprintf(stderr, _("Please make sure that no "
"computer account\nnamed "
"like this machine (%s) "
"exists in the domain\n"),
global_myname());
}
goto done;
}
TALLOC_FREE(netlogon_schannel_pipe);
}
TALLOC_FREE(pipe_hnd);
/* Now store the secret in the secrets database */
strupper_m(CONST_DISCARD(char *, domain));
if (!secrets_store_domain_sid(domain, domain_sid)) {
DEBUG(0, ("error storing domain sid for %s\n", domain));
goto done;
}
if (!secrets_store_machine_password(clear_trust_password, domain, sec_channel_type)) {
DEBUG(0, ("error storing plaintext domain secrets for %s\n", domain));
}
/* double-check, connection from scratch */
status = net_rpc_join_ok(c, domain, cli->desthost, &cli->dest_ss);
retval = NT_STATUS_IS_OK(status) ? 0 : -1;
done:
/* Display success or failure */
if (domain) {
if (retval != 0) {
fprintf(stderr,_("Unable to join domain %s.\n"),domain);
} else {
printf(_("Joined domain %s.\n"),domain);
}
}
cli_shutdown(cli);
TALLOC_FREE(clear_trust_password);
return retval;
}
static NTSTATUS connect_to_domain_password_server(struct cli_state **cli,
const char *domain,
const char *dc_name,
const struct sockaddr_storage *dc_ss,
struct rpc_pipe_client **pipe_ret)
{
NTSTATUS result;
struct rpc_pipe_client *netlogon_pipe = NULL;
*cli = NULL;
*pipe_ret = NULL;
/* TODO: Send a SAMLOGON request to determine whether this is a valid
logonserver. We can avoid a 30-second timeout if the DC is down
if the SAMLOGON request fails as it is only over UDP. */
/* we use a mutex to prevent two connections at once - when a
Win2k PDC get two connections where one hasn't completed a
session setup yet it will send a TCP reset to the first
connection (tridge) */
/*
* With NT4.x DC's *all* authentication must be serialized to avoid
* ACCESS_DENIED errors if 2 auths are done from the same machine. JRA.
*/
mutex = grab_named_mutex(NULL, dc_name, 10);
if (mutex == NULL) {
return NT_STATUS_NO_LOGON_SERVERS;
}
/* Attempt connection */
result = cli_full_connection(cli, lp_netbios_name(), dc_name, dc_ss, 0,
"IPC$", "IPC", "", "", "", 0, SMB_SIGNING_DEFAULT);
if (!NT_STATUS_IS_OK(result)) {
/* map to something more useful */
if (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)) {
result = NT_STATUS_NO_LOGON_SERVERS;
}
if (*cli) {
cli_shutdown(*cli);
*cli = NULL;
}
TALLOC_FREE(mutex);
return result;
}
/*
* We now have an anonymous connection to IPC$ on the domain password server.
*/
/*
* Even if the connect succeeds we need to setup the netlogon
* pipe here. We do this as we may just have changed the domain
* account password on the PDC and yet we may be talking to
* a BDC that doesn't have this replicated yet. In this case
* a successful connect to a DC needs to take the netlogon connect
* into account also. This patch from "Bjart Kvarme" <*****@*****.**>.
*/
/* open the netlogon pipe. */
if (lp_client_schannel()) {
/* We also setup the creds chain in the open_schannel call. */
result = cli_rpc_pipe_open_schannel(
*cli, &ndr_table_netlogon, NCACN_NP,
DCERPC_AUTH_LEVEL_PRIVACY, domain, &netlogon_pipe);
} else {
result = cli_rpc_pipe_open_noauth(
*cli, &ndr_table_netlogon, &netlogon_pipe);
}
if (!NT_STATUS_IS_OK(result)) {
DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
machine %s. Error was : %s.\n", dc_name, nt_errstr(result)));
cli_shutdown(*cli);
*cli = NULL;
TALLOC_FREE(mutex);
return result;
}
NTSTATUS cli_nt_establish_netlogon(struct cli_state *cli, int sec_chan,
const uchar trust_password[16])
{
NTSTATUS result;
uint32 neg_flags = NETLOGON_NEG_AUTH2_FLAGS;
int fnum;
cli_nt_netlogon_netsec_session_close(cli);
if (lp_client_schannel() != False)
neg_flags |= NETLOGON_NEG_SCHANNEL;
result = cli_nt_setup_creds(cli, sec_chan, trust_password,
&neg_flags, 2);
if (!NT_STATUS_IS_OK(result)) {
cli_nt_session_close(cli);
return result;
}
if ((lp_client_schannel() == True) &&
((neg_flags & NETLOGON_NEG_SCHANNEL) == 0)) {
DEBUG(3, ("Server did not offer schannel\n"));
cli_nt_session_close(cli);
return NT_STATUS_UNSUCCESSFUL;
}
if ((lp_client_schannel() == False) ||
((neg_flags & NETLOGON_NEG_SCHANNEL) == 0)) {
return NT_STATUS_OK;
/* keep the existing connection to NETLOGON open */
}
/* Server offered schannel, so try it. */
memcpy(cli->auth_info.sess_key, cli->sess_key,
sizeof(cli->auth_info.sess_key));
cli->saved_netlogon_pipe_fnum = cli->nt_pipe_fnum;
cli->pipe_auth_flags = AUTH_PIPE_NETSEC;
cli->pipe_auth_flags |= AUTH_PIPE_SIGN;
cli->pipe_auth_flags |= AUTH_PIPE_SEAL;
if (cli->capabilities & CAP_NT_SMBS) {
/* The secure channel connection must be opened on the same
session (TCP connection) as the one the challenge was
requested from. */
if ((fnum = cli_nt_create(cli, PIPE_NETLOGON_PLAIN,
DESIRED_ACCESS_PIPE)) == -1) {
DEBUG(0,("cli_nt_create failed to %s machine %s. "
"Error was %s\n",
PIPE_NETLOGON, cli->desthost,
cli_errstr(cli)));
return NT_STATUS_UNSUCCESSFUL;
}
cli->nt_pipe_fnum = (uint16)fnum;
} else {
if ((fnum = cli_open(cli, PIPE_NETLOGON,
O_CREAT|O_RDWR, DENY_NONE)) == -1) {
DEBUG(0,("cli_open failed on pipe %s to machine %s. "
"Error was %s\n",
PIPE_NETLOGON, cli->desthost,
cli_errstr(cli)));
return NT_STATUS_UNSUCCESSFUL;
}
cli->nt_pipe_fnum = (uint16)fnum;
/**************** Set Named Pipe State ***************/
if (!rpc_pipe_set_hnd_state(cli, PIPE_NETLOGON, 0x4300)) {
DEBUG(0,("Pipe hnd state failed. Error was %s\n",
cli_errstr(cli)));
cli_close(cli, cli->nt_pipe_fnum);
return NT_STATUS_UNSUCCESSFUL;
}
}
if (!rpc_pipe_bind(cli, PI_NETLOGON, global_myname())) {
DEBUG(2,("rpc bind to %s failed\n", PIPE_NETLOGON));
cli_close(cli, cli->nt_pipe_fnum);
return NT_STATUS_UNSUCCESSFUL;
}
return NT_STATUS_OK;
}