/* Unix SMB/CIFS implementation. CLDAP server - netlogon handling Copyright (C) Andrew Tridgell 2005 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2008 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 "lib/ldb/include/ldb.h" #include "lib/ldb/include/ldb_errors.h" #include "lib/events/events.h" #include "smbd/service_task.h" #include "cldap_server/cldap_server.h" #include "librpc/gen_ndr/ndr_misc.h" #include "libcli/ldap/ldap_ndr.h" #include "libcli/security/security.h" #include "dsdb/samdb/samdb.h" #include "auth/auth.h" #include "ldb_wrap.h" #include "system/network.h" #include "lib/socket/netif.h" #include "param/param.h" #include "../lib/tsocket/tsocket.h" /* fill in the cldap netlogon union for a given version */ NTSTATUS fill_netlogon_samlogon_response(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx, const char *domain, const char *netbios_domain, struct dom_sid *domain_sid, const char *domain_guid, const char *user, uint32_t acct_control, const char *src_address, uint32_t version, struct loadparm_context *lp_ctx, struct netlogon_samlogon_response *netlogon) { const char *dom_attrs[] = {"objectGUID", NULL}; const char *none_attrs[] = {NULL}; struct ldb_result *dom_res = NULL, *user_res = NULL; int ret; const char **services = lp_server_services(lp_ctx); uint32_t server_type; const char *pdc_name; struct GUID domain_uuid; const char *dns_domain; const char *pdc_dns_name; const char *flatname; const char *server_site; const char *client_site; const char *pdc_ip; struct ldb_dn *domain_dn = NULL; struct interface *ifaces; bool user_known; NTSTATUS status; /* the domain has an optional trailing . */ if (domain && domain[strlen(domain)-1] == '.') { domain = talloc_strndup(mem_ctx, domain, strlen(domain)-1); } if (domain && strcasecmp_m(domain, lp_dnsdomain(lp_ctx)) == 0) { domain_dn = ldb_get_default_basedn(sam_ctx); } if (netbios_domain && strcasecmp_m(domain, lp_sam_name(lp_ctx))) { domain_dn = ldb_get_default_basedn(sam_ctx); } if (domain_dn) { ret = ldb_search(sam_ctx, mem_ctx, &dom_res, domain_dn, LDB_SCOPE_BASE, dom_attrs, "objectClass=domain"); if (ret != LDB_SUCCESS) { DEBUG(2,("Error finding domain '%s'/'%s' in sam: %s\n", domain, ldb_dn_get_linearized(domain_dn), ldb_errstring(sam_ctx))); return NT_STATUS_NO_SUCH_DOMAIN; } if (dom_res->count != 1) { DEBUG(2,("Error finding domain '%s'/'%s' in sam\n", domain, ldb_dn_get_linearized(domain_dn))); return NT_STATUS_NO_SUCH_DOMAIN; } } if ((dom_res == NULL || dom_res->count == 0) && (domain_guid || domain_sid)) { if (domain_guid) { struct GUID binary_guid; struct ldb_val guid_val; enum ndr_err_code ndr_err; /* By this means, we ensure we don't have funny stuff in the GUID */ status = GUID_from_string(domain_guid, &binary_guid); if (!NT_STATUS_IS_OK(status)) { return status; } /* And this gets the result into the binary format we want anyway */ ndr_err = ndr_push_struct_blob(&guid_val, mem_ctx, NULL, &binary_guid, (ndr_push_flags_fn_t)ndr_push_GUID); if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { return NT_STATUS_INVALID_PARAMETER; } ret = ldb_search(sam_ctx, mem_ctx, &dom_res, NULL, LDB_SCOPE_SUBTREE, dom_attrs, "(&(objectCategory=DomainDNS)(objectGUID=%s))", ldb_binary_encode(mem_ctx, guid_val)); } else { /* domain_sid case */ struct dom_sid *sid; struct ldb_val sid_val; enum ndr_err_code ndr_err; /* Rather than go via the string, just push into the NDR form */ ndr_err = ndr_push_struct_blob(&sid_val, mem_ctx, NULL, &sid, (ndr_push_flags_fn_t)ndr_push_dom_sid); if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { return NT_STATUS_INVALID_PARAMETER; } ret = ldb_search(sam_ctx, mem_ctx, &dom_res, NULL, LDB_SCOPE_SUBTREE, dom_attrs, "(&(objectCategory=DomainDNS)(objectSID=%s))", ldb_binary_encode(mem_ctx, sid_val)); } if (ret != LDB_SUCCESS) { DEBUG(2,("Unable to find referece to GUID '%s' or SID %s in sam: %s\n", domain_guid, dom_sid_string(mem_ctx, domain_sid), ldb_errstring(sam_ctx))); return NT_STATUS_NO_SUCH_DOMAIN; } else if (dom_res->count == 1) { /* Ok, now just check it is our domain */ if (ldb_dn_compare(ldb_get_default_basedn(sam_ctx), dom_res->msgs[0]->dn) != 0) { return NT_STATUS_NO_SUCH_DOMAIN; } } else if (dom_res->count > 1) { return NT_STATUS_NO_SUCH_DOMAIN; } } if ((dom_res == NULL || dom_res->count == 0)) { DEBUG(2,("Unable to find domain with name %s or GUID {%s}\n", domain, domain_guid)); return NT_STATUS_NO_SUCH_DOMAIN; } /* work around different inputs for not-specified users */ if (!user) { user = ""; } /* Enquire about any valid username with just a CLDAP packet - * if kerberos didn't also do this, the security folks would * scream... */ if (user[0]) { \ /* Only allow some bits to be enquired: [MS-ATDS] 7.3.3.2 */ if (acct_control == (uint32_t)-1) { acct_control = 0; } acct_control = acct_control & (ACB_TEMPDUP | ACB_NORMAL | ACB_DOMTRUST | ACB_WSTRUST | ACB_SVRTRUST); /* We must exclude disabled accounts, but otherwise do the bitwise match the client asked for */ ret = ldb_search(sam_ctx, mem_ctx, &user_res, dom_res->msgs[0]->dn, LDB_SCOPE_SUBTREE, none_attrs, "(&(objectClass=user)(samAccountName=%s)" "(!(userAccountControl:" LDB_OID_COMPARATOR_AND ":=%u))" "(userAccountControl:" LDB_OID_COMPARATOR_OR ":=%u))", ldb_binary_encode_string(mem_ctx, user), UF_ACCOUNTDISABLE, ds_acb2uf(acct_control)); if (ret != LDB_SUCCESS) { DEBUG(2,("Unable to find referece to user '%s' with ACB 0x%8x under %s: %s\n", user, acct_control, ldb_dn_get_linearized(dom_res->msgs[0]->dn), ldb_errstring(sam_ctx))); return NT_STATUS_NO_SUCH_USER; } else if (user_res->count == 1) { user_known = true; } else { user_known = false; } } else { user_known = true; } server_type = DS_SERVER_DS | DS_SERVER_TIMESERV | DS_SERVER_CLOSEST | DS_SERVER_WRITABLE | DS_SERVER_GOOD_TIMESERV; #if 0 /* w2k8-r2 as a DC does not claim these */ server_type |= DS_DNS_CONTROLLER | DS_DNS_DOMAIN; #endif if (samdb_is_pdc(sam_ctx)) { int *domainFunctionality; server_type |= DS_SERVER_PDC; domainFunctionality = talloc_get_type(ldb_get_opaque(sam_ctx, "domainFunctionality"), int); if (domainFunctionality && *domainFunctionality >= DS_DOMAIN_FUNCTION_2008) { server_type |= DS_SERVER_FULL_SECRET_DOMAIN_6; } } if (samdb_is_gc(sam_ctx)) { server_type |= DS_SERVER_GC; } if (str_list_check(services, "ldap")) { server_type |= DS_SERVER_LDAP; } if (str_list_check(services, "kdc")) { server_type |= DS_SERVER_KDC; } #if 0 /* w2k8-r2 as a sole DC does not claim this */ if (ldb_dn_compare(ldb_get_root_basedn(sam_ctx), ldb_get_default_basedn(sam_ctx)) == 0) { server_type |= DS_DNS_FOREST_ROOT; } #endif pdc_name = talloc_asprintf(mem_ctx, "\\\\%s", lp_netbios_name(lp_ctx)); domain_uuid = samdb_result_guid(dom_res->msgs[0], "objectGUID"); dns_domain = lp_dnsdomain(lp_ctx); pdc_dns_name = talloc_asprintf(mem_ctx, "%s.%s", strlower_talloc(mem_ctx, lp_netbios_name(lp_ctx)), dns_domain); flatname = lp_sam_name(lp_ctx); server_site = samdb_server_site_name(sam_ctx, mem_ctx); /* FIXME: Hardcoded site name */ client_site = "Default-First-Site-Name"; load_interfaces(mem_ctx, lp_interfaces(lp_ctx), &ifaces); pdc_ip = iface_best_ip(ifaces, src_address); ZERO_STRUCTP(netlogon); /* check if either of these bits is present */ if (version & (NETLOGON_NT_VERSION_5EX|NETLOGON_NT_VERSION_5EX_WITH_IP)) { uint32_t extra_flags = 0; netlogon->ntver = NETLOGON_NT_VERSION_5EX; /* could check if the user exists */ if (user_known) { netlogon->data.nt5_ex.command = LOGON_SAM_LOGON_RESPONSE_EX; } else { netlogon->data.nt5_ex.command = LOGON_SAM_LOGON_USER_UNKNOWN_EX; } netlogon->data.nt5_ex.server_type = server_type; netlogon->data.nt5_ex.domain_uuid = domain_uuid; netlogon->data.nt5_ex.forest = dns_domain; netlogon->data.nt5_ex.dns_domain = dns_domain; netlogon->data.nt5_ex.pdc_dns_name = pdc_dns_name; netlogon->data.nt5_ex.domain = flatname; netlogon->data.nt5_ex.pdc_name = lp_netbios_name(lp_ctx); netlogon->data.nt5_ex.user_name = user; netlogon->data.nt5_ex.server_site = server_site; netlogon->data.nt5_ex.client_site = client_site; if (version & NETLOGON_NT_VERSION_5EX_WITH_IP) { /* Clearly this needs to be fixed up for IPv6 */ extra_flags = NETLOGON_NT_VERSION_5EX_WITH_IP; netlogon->data.nt5_ex.sockaddr.sockaddr_family = 2; netlogon->data.nt5_ex.sockaddr.pdc_ip = pdc_ip; netlogon->data.nt5_ex.sockaddr.remaining = data_blob_talloc_zero(mem_ctx, 8); } netlogon->data.nt5_ex.nt_version = NETLOGON_NT_VERSION_1|NETLOGON_NT_VERSION_5EX|extra_flags; netlogon->data.nt5_ex.lmnt_token = 0xFFFF; netlogon->data.nt5_ex.lm20_token = 0xFFFF; } else if (version & NETLOGON_NT_VERSION_5) { netlogon->ntver = NETLOGON_NT_VERSION_5; /* could check if the user exists */ if (user_known) { netlogon->data.nt5.command = LOGON_SAM_LOGON_RESPONSE; } else { netlogon->data.nt5.command = LOGON_SAM_LOGON_USER_UNKNOWN; } netlogon->data.nt5.pdc_name = pdc_name; netlogon->data.nt5.user_name = user; netlogon->data.nt5.domain_name = flatname; netlogon->data.nt5.domain_uuid = domain_uuid; netlogon->data.nt5.forest = dns_domain; netlogon->data.nt5.dns_domain = dns_domain; netlogon->data.nt5.pdc_dns_name = pdc_dns_name; netlogon->data.nt5.pdc_ip = pdc_ip; netlogon->data.nt5.server_type = server_type; netlogon->data.nt5.nt_version = NETLOGON_NT_VERSION_1|NETLOGON_NT_VERSION_5; netlogon->data.nt5.lmnt_token = 0xFFFF; netlogon->data.nt5.lm20_token = 0xFFFF; } else /* (version & NETLOGON_NT_VERSION_1) and all other cases */ { netlogon->ntver = NETLOGON_NT_VERSION_1; /* could check if the user exists */ if (user_known) { netlogon->data.nt4.command = LOGON_SAM_LOGON_RESPONSE; } else { netlogon->data.nt4.command = LOGON_SAM_LOGON_USER_UNKNOWN; } netlogon->data.nt4.server = pdc_name; netlogon->data.nt4.user_name = user; netlogon->data.nt4.domain = flatname; netlogon->data.nt4.nt_version = NETLOGON_NT_VERSION_1; netlogon->data.nt4.lmnt_token = 0xFFFF; netlogon->data.nt4.lm20_token = 0xFFFF; } return NT_STATUS_OK; } /* handle incoming cldap requests */ void cldapd_netlogon_request(struct cldap_socket *cldap, struct cldapd_server *cldapd, TALLOC_CTX *tmp_ctx, uint32_t message_id, struct ldb_parse_tree *tree, struct tsocket_address *src) { int i; const char *domain = NULL; const char *host = NULL; const char *user = NULL; const char *domain_guid = NULL; const char *domain_sid = NULL; int acct_control = -1; int version = -1; struct netlogon_samlogon_response netlogon; NTSTATUS status = NT_STATUS_INVALID_PARAMETER; if (tree->operation != LDB_OP_AND) goto failed; /* extract the query elements */ for (i=0;i<tree->u.list.num_elements;i++) { struct ldb_parse_tree *t = tree->u.list.elements[i]; if (t->operation != LDB_OP_EQUALITY) goto failed; if (strcasecmp(t->u.equality.attr, "DnsDomain") == 0) { domain = talloc_strndup(tmp_ctx, (const char *)t->u.equality.value.data, t->u.equality.value.length); } if (strcasecmp(t->u.equality.attr, "Host") == 0) { host = talloc_strndup(tmp_ctx, (const char *)t->u.equality.value.data, t->u.equality.value.length); } if (strcasecmp(t->u.equality.attr, "DomainGuid") == 0) { NTSTATUS enc_status; struct GUID guid; enc_status = ldap_decode_ndr_GUID(tmp_ctx, t->u.equality.value, &guid); if (NT_STATUS_IS_OK(enc_status)) { domain_guid = GUID_string(tmp_ctx, &guid); } } if (strcasecmp(t->u.equality.attr, "DomainSid") == 0) { domain_sid = talloc_strndup(tmp_ctx, (const char *)t->u.equality.value.data, t->u.equality.value.length); } if (strcasecmp(t->u.equality.attr, "User") == 0) { user = talloc_strndup(tmp_ctx, (const char *)t->u.equality.value.data, t->u.equality.value.length); } if (strcasecmp(t->u.equality.attr, "NtVer") == 0 && t->u.equality.value.length == 4) { version = IVAL(t->u.equality.value.data, 0); } if (strcasecmp(t->u.equality.attr, "AAC") == 0 && t->u.equality.value.length == 4) { acct_control = IVAL(t->u.equality.value.data, 0); } } if (domain_guid == NULL && domain == NULL) { domain = lp_dnsdomain(cldapd->task->lp_ctx); } if (version == -1) { goto failed; } DEBUG(5,("cldap netlogon query domain=%s host=%s user=%s version=%d guid=%s\n", domain, host, user, version, domain_guid)); status = fill_netlogon_samlogon_response(cldapd->samctx, tmp_ctx, domain, NULL, NULL, domain_guid, user, acct_control, tsocket_address_inet_addr_string(src, tmp_ctx), version, cldapd->task->lp_ctx, &netlogon); if (!NT_STATUS_IS_OK(status)) { goto failed; } status = cldap_netlogon_reply(cldap, lp_iconv_convenience(cldapd->task->lp_ctx), message_id, src, version, &netlogon); if (!NT_STATUS_IS_OK(status)) { goto failed; } return; failed: DEBUG(2,("cldap netlogon query failed domain=%s host=%s version=%d - %s\n", domain, host, version, nt_errstr(status))); cldap_empty_reply(cldap, message_id, src); }