示例#1
0
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;
}
示例#2
0
/**
 * 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;
}
示例#3
0
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;
}
示例#4
0
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;
	}
示例#5
0
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;
}