/* Samba Unix/Linux SMB client library Distributed SMB/CIFS Server Management Utility Copyright (C) 2001 Andrew Bartlett (abartlet@samba.org) Copyright (C) Tim Potter 2001 Copyright (C) 2008 Guenther Deschner 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 "utils/net.h" #include "../libcli/auth/libcli_auth.h" /* Macro for checking RPC error codes to make things more readable */ #define CHECK_RPC_ERR(rpc, msg) \ if (!NT_STATUS_IS_OK(result = rpc)) { \ DEBUG(0, (msg ": %s\n", nt_errstr(result))); \ goto done; \ } #define CHECK_RPC_ERR_DEBUG(rpc, debug_args) \ if (!NT_STATUS_IS_OK(result = rpc)) { \ DEBUG(0, debug_args); \ goto done; \ } /** * 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, PIPE_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; } /** * Join a domain using the administrator username and password * * @param argc Standard main() style argc * @param argc Standard main() style argv. Initial components are already * stripped. Currently not used. * @return A shell status integer (0 for success) * **/ 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; uint32 sec_channel_type; struct rpc_pipe_client *pipe_hnd = NULL; /* rpc variables */ struct policy_handle lsa_pol, sam_pol, domain_pol, user_pol; 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 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 } /* Make authenticated connection to remote machine */ result = net_make_ipc_connection(c, NET_FLAGS_PDC, &cli); if (!NT_STATUS_IS_OK(result)) { return 1; } if (!(mem_ctx = talloc_init("net_rpc_join_newstyle"))) { DEBUG(0, ("Could not initialise talloc context\n")); goto done; } /* Fetch domain sid */ result = cli_rpc_pipe_open_noauth(cli, &ndr_table_lsarpc.syntax_id, &pipe_hnd); if (!NT_STATUS_IS_OK(result)) { DEBUG(0, ("Error connecting to LSA pipe. Error was %s\n", nt_errstr(result) )); goto done; } CHECK_RPC_ERR(rpccli_lsa_open_policy(pipe_hnd, mem_ctx, true, SEC_FLAG_MAXIMUM_ALLOWED, &lsa_pol), "error opening lsa policy handle"); CHECK_RPC_ERR(rpccli_lsa_QueryInfoPolicy(pipe_hnd, mem_ctx, &lsa_pol, LSA_POLICY_INFO_ACCOUNT_DOMAIN, &info), "error querying info policy"); domain = info->account_domain.name.string; domain_sid = info->account_domain.sid; rpccli_lsa_Close(pipe_hnd, mem_ctx, &lsa_pol); 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 */ result = cli_rpc_pipe_open_noauth(cli, &ndr_table_samr.syntax_id, &pipe_hnd); if (!NT_STATUS_IS_OK(result)) { DEBUG(0, ("Error connecting to SAM pipe. Error was %s\n", nt_errstr(result) )); goto done; } CHECK_RPC_ERR(rpccli_samr_Connect2(pipe_hnd, mem_ctx, pipe_hnd->desthost, SAMR_ACCESS_ENUM_DOMAINS | SAMR_ACCESS_LOOKUP_DOMAIN, &sam_pol), "could not connect to SAM database"); CHECK_RPC_ERR(rpccli_samr_OpenDomain(pipe_hnd, mem_ctx, &sam_pol, SAMR_DOMAIN_ACCESS_LOOKUP_INFO_1 | SAMR_DOMAIN_ACCESS_CREATE_USER | SAMR_DOMAIN_ACCESS_OPEN_ACCOUNT, domain_sid, &domain_pol), "could not open domain"); /* Create domain user */ if ((acct_name = talloc_asprintf(mem_ctx, "%s$", global_myname())) == NULL) { result = 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)); result = rpccli_samr_CreateUser2(pipe_hnd, mem_ctx, &domain_pol, &lsa_acct_name, acb_info, acct_flags, &user_pol, &access_granted, &user_rid); if (!NT_STATUS_IS_OK(result) && !NT_STATUS_EQUAL(result, NT_STATUS_USER_EXISTS)) { 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)) { rpccli_samr_Close(pipe_hnd, mem_ctx, &user_pol); } CHECK_RPC_ERR_DEBUG(rpccli_samr_LookupNames(pipe_hnd, mem_ctx, &domain_pol, 1, &lsa_acct_name, &user_rids, &name_types), ("error looking up rid for user %s: %s\n", acct_name, nt_errstr(result))); 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_RPC_ERR_DEBUG( rpccli_samr_OpenUser(pipe_hnd, mem_ctx, &domain_pol, SEC_FLAG_MAXIMUM_ALLOWED, user_rid, &user_pol), ("could not re-open existing user %s: %s\n", acct_name, 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_RPC_ERR(rpccli_samr_SetUserInfo2(pipe_hnd, mem_ctx, &user_pol, 24, &set_info), "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. */ result = rpccli_samr_SetUserInfo(pipe_hnd, mem_ctx, &user_pol, 16, &set_info); rpccli_samr_Close(pipe_hnd, mem_ctx, &user_pol); TALLOC_FREE(pipe_hnd); /* Done with this pipe */ /* Now check the whole process from top-to-bottom */ result = cli_rpc_pipe_open_noauth(cli, &ndr_table_netlogon.syntax_id, &pipe_hnd); if (!NT_STATUS_IS_OK(result)) { DEBUG(0,("Error connecting to NETLOGON pipe. Error was %s\n", nt_errstr(result) )); goto done; } result = 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(result)) { DEBUG(0, ("Error in domain join verification (credential setup failed): %s\n\n", nt_errstr(result))); if ( NT_STATUS_EQUAL(result, 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; result = cli_rpc_pipe_open_schannel_with_key( cli, &ndr_table_netlogon.syntax_id, NCACN_NP, PIPE_AUTH_LEVEL_PRIVACY, domain, &pipe_hnd->dc, &netlogon_schannel_pipe); if (!NT_STATUS_IS_OK(result)) { DEBUG(0, ("Error in domain join verification (schannel setup failed): %s\n\n", nt_errstr(result))); if ( NT_STATUS_EQUAL(result, 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 */ result = net_rpc_join_ok(c, domain, cli->desthost, &cli->dest_ss); retval = NT_STATUS_IS_OK(result) ? 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; } /** * check that a join is OK * * @return A shell status integer (0 for success) * **/ int net_rpc_testjoin(struct net_context *c, int argc, const char **argv) { NTSTATUS nt_status; if (c->display_usage) { d_printf(_("Usage\n" "net rpc testjoin\n" " Test if a join is OK\n")); return 0; } /* Display success or failure */ nt_status = net_rpc_join_ok(c, c->opt_target_workgroup, NULL, NULL); if (!NT_STATUS_IS_OK(nt_status)) { fprintf(stderr, _("Join to domain '%s' is not valid: %s\n"), c->opt_target_workgroup, nt_errstr(nt_status)); return -1; } printf(_("Join to '%s' is OK\n"), c->opt_target_workgroup); return 0; }