/* SAM ldb module Copyright (C) Andrew Bartlett 2005 Copyright (C) Simo Sorce 2004-2008 Copyright (C) Matthias Dieter Wallnöfer 2009-2010 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 . */ /* * Name: ldb * * Component: ldb samldb module * * Description: add embedded user/group creation functionality * * Author: Simo Sorce */ #include "includes.h" #include "libcli/ldap/ldap_ndr.h" #include "ldb_module.h" #include "dsdb/samdb/samdb.h" #include "dsdb/samdb/ldb_modules/util.h" #include "libcli/security/security.h" #include "librpc/gen_ndr/ndr_security.h" #include "../lib/util/util_ldb.h" #include "ldb_wrap.h" #include "param/param.h" struct samldb_ctx; typedef int (*samldb_step_fn_t)(struct samldb_ctx *); struct samldb_step { struct samldb_step *next; samldb_step_fn_t fn; }; struct samldb_ctx { struct ldb_module *module; struct ldb_request *req; /* used for add operations */ const char *type; /* the resulting message */ struct ldb_message *msg; /* used in "samldb_find_for_defaultObjectCategory" */ struct ldb_dn *dn, *res_dn; /* all the async steps necessary to complete the operation */ struct samldb_step *steps; struct samldb_step *curstep; /* If someone set an ares to forward controls and response back to the caller */ struct ldb_reply *ares; }; static struct samldb_ctx *samldb_ctx_init(struct ldb_module *module, struct ldb_request *req) { struct ldb_context *ldb; struct samldb_ctx *ac; ldb = ldb_module_get_ctx(module); ac = talloc_zero(req, struct samldb_ctx); if (ac == NULL) { ldb_oom(ldb); return NULL; } ac->module = module; ac->req = req; return ac; } static int samldb_add_step(struct samldb_ctx *ac, samldb_step_fn_t fn) { struct samldb_step *step, *stepper; step = talloc_zero(ac, struct samldb_step); if (step == NULL) { return ldb_oom(ldb_module_get_ctx(ac->module)); } step->fn = fn; if (ac->steps == NULL) { ac->steps = step; ac->curstep = step; } else { if (ac->curstep == NULL) return ldb_operr(ldb_module_get_ctx(ac->module)); for (stepper = ac->curstep; stepper->next != NULL; stepper = stepper->next); stepper->next = step; } return LDB_SUCCESS; } static int samldb_first_step(struct samldb_ctx *ac) { if (ac->steps == NULL) { return ldb_operr(ldb_module_get_ctx(ac->module)); } ac->curstep = ac->steps; return ac->curstep->fn(ac); } static int samldb_next_step(struct samldb_ctx *ac) { if (ac->curstep->next) { ac->curstep = ac->curstep->next; return ac->curstep->fn(ac); } /* we exit the samldb module here */ /* If someone set an ares to forward controls and response back to the caller, use them */ if (ac->ares) { return ldb_module_done(ac->req, ac->ares->controls, ac->ares->response, LDB_SUCCESS); } else { return ldb_module_done(ac->req, NULL, NULL, LDB_SUCCESS); } } /* sAMAccountName handling */ static int samldb_generate_sAMAccountName(struct ldb_context *ldb, struct ldb_message *msg) { char *name; /* Format: $000000-000000000000 */ name = talloc_asprintf(msg, "$%.6X-%.6X%.6X", (unsigned int)generate_random(), (unsigned int)generate_random(), (unsigned int)generate_random()); if (name == NULL) { return ldb_oom(ldb); } return ldb_msg_add_steal_string(msg, "sAMAccountName", name); } static int samldb_check_sAMAccountName(struct samldb_ctx *ac) { struct ldb_context *ldb = ldb_module_get_ctx(ac->module); const char *name; int ret; if (ldb_msg_find_element(ac->msg, "sAMAccountName") == NULL) { ret = samldb_generate_sAMAccountName(ldb, ac->msg); if (ret != LDB_SUCCESS) { return ret; } } name = ldb_msg_find_attr_as_string(ac->msg, "sAMAccountName", NULL); if (name == NULL) { return ldb_operr(ldb); } ret = samdb_search_count(ldb, NULL, "(sAMAccountName=%s)", ldb_binary_encode_string(ac, name)); if ((ret < 0) || (ret > 1)) { return ldb_operr(ldb); } if (ret == 1) { return LDB_ERR_ENTRY_ALREADY_EXISTS; } return samldb_next_step(ac); } /* sAMAccountType handling */ static int samldb_check_sAMAccountType(struct samldb_ctx *ac) { struct ldb_context *ldb; unsigned int account_type; unsigned int group_type; unsigned int uac; int ret; ldb = ldb_module_get_ctx(ac->module); /* make sure sAMAccountType is not specified */ if (ldb_msg_find_element(ac->msg, "sAMAccountType") != NULL) { ldb_asprintf_errstring(ldb, "sAMAccountType must not be specified!"); return LDB_ERR_UNWILLING_TO_PERFORM; } if (strcmp("user", ac->type) == 0) { uac = samdb_result_uint(ac->msg, "userAccountControl", 0); if (uac == 0) { ldb_asprintf_errstring(ldb, "userAccountControl invalid!"); return LDB_ERR_UNWILLING_TO_PERFORM; } else { account_type = ds_uf2atype(uac); ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg, "sAMAccountType", account_type); if (ret != LDB_SUCCESS) { return ret; } } } else if (strcmp("group", ac->type) == 0) { group_type = samdb_result_uint(ac->msg, "groupType", 0); if (group_type == 0) { ldb_asprintf_errstring(ldb, "groupType invalid!\n"); return LDB_ERR_UNWILLING_TO_PERFORM; } else { account_type = ds_gtype2atype(group_type); ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg, "sAMAccountType", account_type); if (ret != LDB_SUCCESS) { return ret; } } } return samldb_next_step(ac); } /* primaryGroupID handling */ static int samldb_check_primaryGroupID(struct samldb_ctx *ac) { struct ldb_context *ldb = ldb_module_get_ctx(ac->module); struct ldb_dn *prim_group_dn; uint32_t rid; struct dom_sid *sid; int ret; rid = samdb_result_uint(ac->msg, "primaryGroupID", (uint32_t) -1); if (rid == (uint32_t) -1) { uint32_t uac = samdb_result_uint(ac->msg, "userAccountControl", 0); rid = ds_uf2prim_group_rid(uac); ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg, "primaryGroupID", rid); if (ret != LDB_SUCCESS) { return ret; } } else if (!ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID)) { ldb_set_errstring(ldb, "The primary group isn't settable on add operations!"); return LDB_ERR_UNWILLING_TO_PERFORM; } sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid); if (sid == NULL) { return ldb_operr(ldb); } prim_group_dn = samdb_search_dn(ldb, ac, NULL, "(objectSid=%s)", ldap_encode_ndr_dom_sid(ac, sid)); if (prim_group_dn == NULL) { ldb_asprintf_errstring(ldb, "Failed to find primary group with RID %u!", rid); return LDB_ERR_UNWILLING_TO_PERFORM; } return samldb_next_step(ac); } static bool samldb_msg_add_sid(struct ldb_message *msg, const char *name, const struct dom_sid *sid) { struct ldb_val v; enum ndr_err_code ndr_err; ndr_err = ndr_push_struct_blob(&v, msg, sid, (ndr_push_flags_fn_t)ndr_push_dom_sid); if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { return false; } return (ldb_msg_add_value(msg, name, &v, NULL) == 0); } /* allocate a SID using our RID Set */ static int samldb_allocate_sid(struct samldb_ctx *ac) { uint32_t rid; struct dom_sid *sid; struct ldb_context *ldb = ldb_module_get_ctx(ac->module); int ret; ret = ridalloc_allocate_rid(ac->module, &rid); if (ret != LDB_SUCCESS) { return ret; } sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid); if (sid == NULL) { return ldb_module_oom(ac->module); } if ( ! samldb_msg_add_sid(ac->msg, "objectSid", sid)) { return ldb_operr(ldb); } return samldb_next_step(ac); } /* see if a krbtgt_number is available */ static bool samldb_krbtgtnumber_available(struct samldb_ctx *ac, unsigned krbtgt_number) { TALLOC_CTX *tmp_ctx = talloc_new(ac); struct ldb_result *res; const char *attrs[] = { NULL }; int ret; ret = dsdb_module_search(ac->module, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE, attrs, DSDB_FLAG_NEXT_MODULE, "msDC-SecondaryKrbTgtNumber=%u", krbtgt_number); if (ret == LDB_SUCCESS && res->count == 0) { talloc_free(tmp_ctx); return true; } talloc_free(tmp_ctx); return false; } /* special handling for add in RODC join */ static int samldb_rodc_add(struct samldb_ctx *ac) { struct ldb_context *ldb = ldb_module_get_ctx(ac->module); unsigned krbtgt_number, i_start, i; int ret; /* find a unused msDC-SecondaryKrbTgtNumber */ i_start = generate_random() & 0xFFFF; if (i_start == 0) { i_start = 1; } for (i=i_start; i<=0xFFFF; i++) { if (samldb_krbtgtnumber_available(ac, i)) { krbtgt_number = i; goto found; } } for (i=1; imodule), "%08X: Unable to find available msDS-SecondaryKrbTgtNumber", W_ERROR_V(WERR_NO_SYSTEM_RESOURCES)); return LDB_ERR_OTHER; found: ret = ldb_msg_add_empty(ac->msg, "msDS-SecondaryKrbTgtNumber", LDB_FLAG_INTERNAL_DISABLE_VALIDATION, NULL); if (ret != LDB_SUCCESS) { return ldb_operr(ldb); } ret = ldb_msg_add_fmt(ac->msg, "msDS-SecondaryKrbTgtNumber", "%u", krbtgt_number); if (ret != LDB_SUCCESS) { return ldb_operr(ldb); } ret = ldb_msg_add_fmt(ac->msg, "sAMAccountName", "krbtgt_%u", krbtgt_number); if (ret != LDB_SUCCESS) { return ldb_operr(ldb); } return samldb_next_step(ac); } static int samldb_find_for_defaultObjectCategory(struct samldb_ctx *ac) { struct ldb_context *ldb = ldb_module_get_ctx(ac->module); struct ldb_result *res; const char *no_attrs[] = { NULL }; int ret; ac->res_dn = NULL; ret = dsdb_module_search(ac->module, ac, &res, ac->dn, LDB_SCOPE_BASE, no_attrs, DSDB_SEARCH_SHOW_DN_IN_STORAGE_FORMAT | DSDB_FLAG_NEXT_MODULE, "(objectClass=classSchema)"); if (ret == LDB_ERR_NO_SUCH_OBJECT) { /* Don't be pricky when the DN doesn't exist if we have the */ /* RELAX control specified */ if (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID) == NULL) { ldb_set_errstring(ldb, "samldb_find_defaultObjectCategory: " "Invalid DN for 'defaultObjectCategory'!"); return LDB_ERR_CONSTRAINT_VIOLATION; } } if ((ret != LDB_ERR_NO_SUCH_OBJECT) && (ret != LDB_SUCCESS)) { return ret; } ac->res_dn = ac->dn; return samldb_next_step(ac); } /** * msDS-IntId attributeSchema attribute handling * during LDB_ADD request processing */ static int samldb_add_handle_msDS_IntId(struct samldb_ctx *ac) { int ret; bool id_exists; uint32_t msds_intid; uint32_t system_flags; struct ldb_context *ldb; struct ldb_result *ldb_res; struct ldb_dn *schema_dn; ldb = ldb_module_get_ctx(ac->module); schema_dn = ldb_get_schema_basedn(ldb); /* replicated update should always go through */ if (ldb_request_get_control(ac->req, DSDB_CONTROL_REPLICATED_UPDATE_OID)) { return LDB_SUCCESS; } /* msDS-IntId is handled by system and should never be * passed by clients */ if (ldb_msg_find_element(ac->msg, "msDS-IntId")) { return LDB_ERR_UNWILLING_TO_PERFORM; } /* do not generate msDS-IntId if Relax control is passed */ if (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID)) { return LDB_SUCCESS; } /* check Functional Level */ if (dsdb_functional_level(ldb) < DS_DOMAIN_FUNCTION_2003) { return LDB_SUCCESS; } /* check systemFlags for SCHEMA_BASE_OBJECT flag */ system_flags = ldb_msg_find_attr_as_uint(ac->msg, "systemFlags", 0); if (system_flags & SYSTEM_FLAG_SCHEMA_BASE_OBJECT) { return LDB_SUCCESS; } /* Generate new value for msDs-IntId * Value should be in 0x80000000..0xBFFFFFFF range */ msds_intid = generate_random() % 0X3FFFFFFF; msds_intid += 0x80000000; /* probe id values until unique one is found */ do { msds_intid++; if (msds_intid > 0xBFFFFFFF) { msds_intid = 0x80000001; } ret = dsdb_module_search(ac->module, ac, &ldb_res, schema_dn, LDB_SCOPE_ONELEVEL, NULL, DSDB_FLAG_NEXT_MODULE, "(msDS-IntId=%d)", msds_intid); if (ret != LDB_SUCCESS) { ldb_debug_set(ldb, LDB_DEBUG_ERROR, __location__": Searching for msDS-IntId=%d failed - %s\n", msds_intid, ldb_errstring(ldb)); return ldb_operr(ldb); } id_exists = (ldb_res->count > 0); talloc_free(ldb_res); } while(id_exists); return ldb_msg_add_fmt(ac->msg, "msDS-IntId", "%d", msds_intid); } /* * samldb_add_entry (async) */ static int samldb_add_entry_callback(struct ldb_request *req, struct ldb_reply *ares) { struct ldb_context *ldb; struct samldb_ctx *ac; int ret; ac = talloc_get_type(req->context, struct samldb_ctx); ldb = ldb_module_get_ctx(ac->module); if (!ares) { return ldb_module_done(ac->req, NULL, NULL, LDB_ERR_OPERATIONS_ERROR); } if (ares->type == LDB_REPLY_REFERRAL) { return ldb_module_send_referral(ac->req, ares->referral); } if (ares->error != LDB_SUCCESS) { return ldb_module_done(ac->req, ares->controls, ares->response, ares->error); } if (ares->type != LDB_REPLY_DONE) { ldb_set_errstring(ldb, "Invalid reply type!\n"); return ldb_module_done(ac->req, NULL, NULL, LDB_ERR_OPERATIONS_ERROR); } /* The caller may wish to get controls back from the add */ ac->ares = talloc_steal(ac, ares); ret = samldb_next_step(ac); if (ret != LDB_SUCCESS) { return ldb_module_done(ac->req, NULL, NULL, ret); } return ret; } static int samldb_add_entry(struct samldb_ctx *ac) { struct ldb_context *ldb; struct ldb_request *req; int ret; ldb = ldb_module_get_ctx(ac->module); ret = ldb_build_add_req(&req, ldb, ac, ac->msg, ac->req->controls, ac, samldb_add_entry_callback, ac->req); if (ret != LDB_SUCCESS) { return ret; } return ldb_next_request(ac->module, req); } /* * return true if msg carries an attributeSchema that is intended to be RODC * filtered but is also a system-critical attribute. */ static bool check_rodc_critical_attribute(struct ldb_message *msg) { uint32_t schemaFlagsEx, searchFlags, rodc_filtered_flags; schemaFlagsEx = ldb_msg_find_attr_as_uint(msg, "schemaFlagsEx", 0); searchFlags = ldb_msg_find_attr_as_uint(msg, "searchFlags", 0); rodc_filtered_flags = (SEARCH_FLAG_RODC_ATTRIBUTE | SEARCH_FLAG_CONFIDENTIAL); if ((schemaFlagsEx & SCHEMA_FLAG_ATTR_IS_CRITICAL) && ((searchFlags & rodc_filtered_flags) == rodc_filtered_flags)) { return true; } else { return false; } } static int samldb_fill_object(struct samldb_ctx *ac, const char *type) { struct ldb_context *ldb; struct loadparm_context *lp_ctx; enum sid_generator sid_generator; int ret; struct ldb_control *rodc_control; struct dom_sid *sid; ldb = ldb_module_get_ctx(ac->module); /* Add informations for the different account types */ ac->type = type; if (strcmp(ac->type, "user") == 0) { ret = samdb_find_or_add_attribute(ldb, ac->msg, "userAccountControl", "546"); if (ret != LDB_SUCCESS) return ret; ret = samdb_find_or_add_attribute(ldb, ac->msg, "badPwdCount", "0"); if (ret != LDB_SUCCESS) return ret; ret = samdb_find_or_add_attribute(ldb, ac->msg, "codePage", "0"); if (ret != LDB_SUCCESS) return ret; ret = samdb_find_or_add_attribute(ldb, ac->msg, "countryCode", "0"); if (ret != LDB_SUCCESS) return ret; ret = samdb_find_or_add_attribute(ldb, ac->msg, "badPasswordTime", "0"); if (ret != LDB_SUCCESS) return ret; ret = samdb_find_or_add_attribute(ldb, ac->msg, "lastLogoff", "0"); if (ret != LDB_SUCCESS) return ret; ret = samdb_find_or_add_attribute(ldb, ac->msg, "lastLogon", "0"); if (ret != LDB_SUCCESS) return ret; ret = samdb_find_or_add_attribute(ldb, ac->msg, "pwdLastSet", "0"); if (ret != LDB_SUCCESS) return ret; ret = samdb_find_or_add_attribute(ldb, ac->msg, "accountExpires", "9223372036854775807"); if (ret != LDB_SUCCESS) return ret; ret = samdb_find_or_add_attribute(ldb, ac->msg, "logonCount", "0"); if (ret != LDB_SUCCESS) return ret; } else if (strcmp(ac->type, "group") == 0) { ret = samdb_find_or_add_attribute(ldb, ac->msg, "groupType", "-2147483646"); if (ret != LDB_SUCCESS) return ret; } else if (strcmp(ac->type, "classSchema") == 0) { const struct ldb_val *rdn_value, *def_obj_cat_val; ret = samdb_find_or_add_attribute(ldb, ac->msg, "rdnAttId", "cn"); if (ret != LDB_SUCCESS) return ret; /* do not allow to mark an attributeSchema as RODC filtered if it * is system-critical */ if (check_rodc_critical_attribute(ac->msg)) { ldb_asprintf_errstring(ldb, "Refusing schema add of %s - cannot combine critical class with RODC filtering", ldb_dn_get_linearized(ac->msg->dn)); return LDB_ERR_UNWILLING_TO_PERFORM; } rdn_value = ldb_dn_get_rdn_val(ac->msg->dn); if (!ldb_msg_find_element(ac->msg, "lDAPDisplayName")) { /* the RDN has prefix "CN" */ ret = ldb_msg_add_string(ac->msg, "lDAPDisplayName", samdb_cn_to_lDAPDisplayName(ac, (const char *) rdn_value->data)); if (ret != LDB_SUCCESS) { ldb_oom(ldb); return ret; } } if (!ldb_msg_find_element(ac->msg, "schemaIDGUID")) { struct GUID guid; /* a new GUID */ guid = GUID_random(); ret = dsdb_msg_add_guid(ac->msg, &guid, "schemaIDGUID"); if (ret != LDB_SUCCESS) { ldb_oom(ldb); return ret; } } def_obj_cat_val = ldb_msg_find_ldb_val(ac->msg, "defaultObjectCategory"); if (def_obj_cat_val != NULL) { /* "defaultObjectCategory" has been set by the caller. * Do some checks for consistency. * NOTE: The real constraint check (that * 'defaultObjectCategory' is the DN of the new * objectclass or any parent of it) is still incomplete. * For now we say that 'defaultObjectCategory' is valid * if it exists and it is of objectclass "classSchema". */ ac->dn = ldb_dn_from_ldb_val(ac, ldb, def_obj_cat_val); if (ac->dn == NULL) { ldb_set_errstring(ldb, "Invalid DN for 'defaultObjectCategory'!"); return LDB_ERR_CONSTRAINT_VIOLATION; } } else { /* "defaultObjectCategory" has not been set by the * caller. Use the entry DN for it. */ ac->dn = ac->msg->dn; ret = samdb_msg_add_string(ldb, ac, ac->msg, "defaultObjectCategory", ldb_dn_get_linearized(ac->dn)); if (ret != LDB_SUCCESS) { ldb_oom(ldb); return ret; } } ret = samldb_add_step(ac, samldb_add_entry); if (ret != LDB_SUCCESS) return ret; /* Now perform the checks for the 'defaultObjectCategory'. The * lookup DN was already saved in "ac->dn" */ ret = samldb_add_step(ac, samldb_find_for_defaultObjectCategory); if (ret != LDB_SUCCESS) return ret; return samldb_first_step(ac); } else if (strcmp(ac->type, "attributeSchema") == 0) { const struct ldb_val *rdn_value; rdn_value = ldb_dn_get_rdn_val(ac->msg->dn); if (!ldb_msg_find_element(ac->msg, "lDAPDisplayName")) { /* the RDN has prefix "CN" */ ret = ldb_msg_add_string(ac->msg, "lDAPDisplayName", samdb_cn_to_lDAPDisplayName(ac, (const char *) rdn_value->data)); if (ret != LDB_SUCCESS) { ldb_oom(ldb); return ret; } } /* do not allow to mark an attributeSchema as RODC filtered if it * is system-critical */ if (check_rodc_critical_attribute(ac->msg)) { ldb_asprintf_errstring(ldb, "Refusing schema add of %s - cannot combine critical attribute with RODC filtering", ldb_dn_get_linearized(ac->msg->dn)); return LDB_ERR_UNWILLING_TO_PERFORM; } ret = samdb_find_or_add_attribute(ldb, ac->msg, "isSingleValued", "FALSE"); if (ret != LDB_SUCCESS) return ret; if (!ldb_msg_find_element(ac->msg, "schemaIDGUID")) { struct GUID guid; /* a new GUID */ guid = GUID_random(); ret = dsdb_msg_add_guid(ac->msg, &guid, "schemaIDGUID"); if (ret != LDB_SUCCESS) { ldb_oom(ldb); return ret; } } /* handle msDS-IntID attribute */ ret = samldb_add_handle_msDS_IntId(ac); if (ret != LDB_SUCCESS) return ret; ret = samldb_add_step(ac, samldb_add_entry); if (ret != LDB_SUCCESS) return ret; return samldb_first_step(ac); } else { ldb_asprintf_errstring(ldb, "Invalid entry type!"); return LDB_ERR_OPERATIONS_ERROR; } rodc_control = ldb_request_get_control(ac->req, LDB_CONTROL_RODC_DCPROMO_OID); if (rodc_control) { /* see [MS-ADTS] 3.1.1.3.4.1.23 LDAP_SERVER_RODC_DCPROMO_OID */ rodc_control->critical = false; ret = samldb_add_step(ac, samldb_rodc_add); if (ret != LDB_SUCCESS) return ret; } /* check if we have a valid sAMAccountName */ ret = samldb_add_step(ac, samldb_check_sAMAccountName); if (ret != LDB_SUCCESS) return ret; /* check account_type/group_type */ ret = samldb_add_step(ac, samldb_check_sAMAccountType); if (ret != LDB_SUCCESS) return ret; /* check if we have a valid primary group ID */ if (strcmp(ac->type, "user") == 0) { ret = samldb_add_step(ac, samldb_check_primaryGroupID); if (ret != LDB_SUCCESS) return ret; } lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"), struct loadparm_context); /* don't allow objectSid to be specified without the RELAX control */ sid = samdb_result_dom_sid(ac, ac->msg, "objectSid"); if (sid && !ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID) && !dsdb_module_am_system(ac->module)) { ldb_asprintf_errstring(ldb, "No SID may be specified in user/group creation for %s", ldb_dn_get_linearized(ac->msg->dn)); return LDB_ERR_UNWILLING_TO_PERFORM; } if (sid == NULL) { sid_generator = lpcfg_sid_generator(lp_ctx); if (sid_generator == SID_GENERATOR_INTERNAL) { ret = samldb_add_step(ac, samldb_allocate_sid); if (ret != LDB_SUCCESS) return ret; } } /* finally proceed with adding the entry */ ret = samldb_add_step(ac, samldb_add_entry); if (ret != LDB_SUCCESS) return ret; return samldb_first_step(ac); } static int samldb_fill_foreignSecurityPrincipal_object(struct samldb_ctx *ac) { struct ldb_context *ldb; struct dom_sid *sid; int ret; ldb = ldb_module_get_ctx(ac->module); sid = samdb_result_dom_sid(ac->msg, ac->msg, "objectSid"); if (sid == NULL) { sid = dom_sid_parse_talloc(ac->msg, (const char *)ldb_dn_get_rdn_val(ac->msg->dn)->data); if (sid == NULL) { ldb_set_errstring(ldb, "No valid SID found in " "ForeignSecurityPrincipal CN!"); return LDB_ERR_CONSTRAINT_VIOLATION; } if (! samldb_msg_add_sid(ac->msg, "objectSid", sid)) { return ldb_operr(ldb); } } /* finally proceed with adding the entry */ ret = samldb_add_step(ac, samldb_add_entry); if (ret != LDB_SUCCESS) return ret; return samldb_first_step(ac); } static int samldb_schema_info_update(struct samldb_ctx *ac) { WERROR werr; struct ldb_context *ldb; struct dsdb_schema *schema; /* replicated update should always go through */ if (ldb_request_get_control(ac->req, DSDB_CONTROL_REPLICATED_UPDATE_OID)) { return LDB_SUCCESS; } /* do not update schemaInfo during provisioning */ if (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID)) { return LDB_SUCCESS; } ldb = ldb_module_get_ctx(ac->module); schema = dsdb_get_schema(ldb, NULL); if (!schema) { ldb_debug_set(ldb, LDB_DEBUG_FATAL, "samldb_schema_info_update: no dsdb_schema loaded"); DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb))); return ldb_operr(ldb); } werr = dsdb_module_schema_info_update(ac->module, schema, DSDB_FLAG_NEXT_MODULE); if (!W_ERROR_IS_OK(werr)) { ldb_debug_set(ldb, LDB_DEBUG_FATAL, "samldb_schema_info_update: " "dsdb_module_schema_info_update failed with %s", win_errstr(werr)); DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb))); return ldb_operr(ldb); } return LDB_SUCCESS; } static int samldb_prim_group_change(struct samldb_ctx *ac) { struct ldb_context *ldb; const char * attrs[] = { "primaryGroupID", "memberOf", NULL }; struct ldb_result *res; struct ldb_message_element *el; struct ldb_message *msg; uint32_t rid; struct dom_sid *sid; struct ldb_dn *prev_prim_group_dn, *new_prim_group_dn; int ret; ldb = ldb_module_get_ctx(ac->module); /* Fetch informations from the existing object */ ret = ldb_search(ldb, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs, NULL); if (ret != LDB_SUCCESS) { return ret; } /* Finds out the DN of the old primary group */ rid = samdb_result_uint(res->msgs[0], "primaryGroupID", (uint32_t) -1); if (rid == (uint32_t) -1) { /* User objects do always have a mandatory "primaryGroupID" * attribute. If this doesn't exist then the object is of the * wrong type. This is the exact Windows error code */ return LDB_ERR_OBJECT_CLASS_VIOLATION; } sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid); if (sid == NULL) { return ldb_operr(ldb); } prev_prim_group_dn = samdb_search_dn(ldb, ac, NULL, "(objectSid=%s)", ldap_encode_ndr_dom_sid(ac, sid)); if (prev_prim_group_dn == NULL) { return ldb_operr(ldb); } /* Finds out the DN of the new primary group */ rid = samdb_result_uint(ac->msg, "primaryGroupID", (uint32_t) -1); if (rid == (uint32_t) -1) { /* we aren't affected of any primary group change */ return LDB_SUCCESS; } sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid); if (sid == NULL) { return ldb_operr(ldb); } new_prim_group_dn = samdb_search_dn(ldb, ac, NULL, "(objectSid=%s)", ldap_encode_ndr_dom_sid(ac, sid)); if (new_prim_group_dn == NULL) { /* Here we know if the specified new primary group candidate is * valid or not. */ return LDB_ERR_UNWILLING_TO_PERFORM; } /* Only update the "member" attributes when we really do have a change */ if (ldb_dn_compare(new_prim_group_dn, prev_prim_group_dn) != 0) { /* We need to be already a normal member of the new primary * group in order to be successful. */ el = samdb_find_attribute(ldb, res->msgs[0], "memberOf", ldb_dn_get_linearized(new_prim_group_dn)); if (el == NULL) { return LDB_ERR_UNWILLING_TO_PERFORM; } /* Remove the "member" attribute on the new primary group */ msg = talloc_zero(ac, struct ldb_message); msg->dn = new_prim_group_dn; ret = samdb_msg_add_delval(ldb, ac, msg, "member", ldb_dn_get_linearized(ac->msg->dn)); if (ret != LDB_SUCCESS) { return ret; } ret = dsdb_module_modify(ac->module, msg, DSDB_FLAG_NEXT_MODULE); if (ret != LDB_SUCCESS) { return ret; } /* Add a "member" attribute for the previous primary group */ msg = talloc_zero(ac, struct ldb_message); msg->dn = prev_prim_group_dn; ret = samdb_msg_add_addval(ldb, ac, msg, "member", ldb_dn_get_linearized(ac->msg->dn)); if (ret != LDB_SUCCESS) { return ret; } ret = dsdb_module_modify(ac->module, msg, DSDB_FLAG_NEXT_MODULE); if (ret != LDB_SUCCESS) { return ret; } } return LDB_SUCCESS; } static int samldb_member_check(struct samldb_ctx *ac) { struct ldb_context *ldb; struct ldb_message_element *el; struct ldb_dn *member_dn, *group_dn; uint32_t prim_group_rid; struct dom_sid *sid; unsigned int i; ldb = ldb_module_get_ctx(ac->module); el = ldb_msg_find_element(ac->msg, "member"); if (el == NULL) { /* we aren't affected */ return LDB_SUCCESS; } for (i = 0; i < el->num_values; i++) { /* Denies to add "member"s to groups which are primary ones * for them */ member_dn = ldb_dn_from_ldb_val(ac, ldb, &el->values[i]); if (!ldb_dn_validate(member_dn)) { return ldb_operr(ldb); } prim_group_rid = samdb_search_uint(ldb, ac, (uint32_t) -1, member_dn, "primaryGroupID", NULL); if (prim_group_rid == (uint32_t) -1) { /* the member hasn't to be a user account -> therefore * no check needed in this case. */ continue; } sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), prim_group_rid); if (sid == NULL) { return ldb_operr(ldb); } group_dn = samdb_search_dn(ldb, ac, NULL, "(objectSid=%s)", ldap_encode_ndr_dom_sid(ac, sid)); if (group_dn == NULL) { return ldb_operr(ldb); } if (ldb_dn_compare(group_dn, ac->msg->dn) == 0) { return LDB_ERR_ENTRY_ALREADY_EXISTS; } } return LDB_SUCCESS; } /* add */ static int samldb_add(struct ldb_module *module, struct ldb_request *req) { struct ldb_context *ldb; struct samldb_ctx *ac; int ret; ldb = ldb_module_get_ctx(module); ldb_debug(ldb, LDB_DEBUG_TRACE, "samldb_add\n"); /* do not manipulate our control entries */ if (ldb_dn_is_special(req->op.add.message->dn)) { return ldb_next_request(module, req); } ac = samldb_ctx_init(module, req); if (ac == NULL) { return ldb_operr(ldb); } /* build the new msg */ ac->msg = ldb_msg_copy(ac, ac->req->op.add.message); if (!ac->msg) { talloc_free(ac); ldb_debug(ldb, LDB_DEBUG_FATAL, "samldb_add: ldb_msg_copy failed!\n"); return ldb_operr(ldb); } if (samdb_find_attribute(ldb, ac->msg, "objectclass", "user") != NULL) { return samldb_fill_object(ac, "user"); } if (samdb_find_attribute(ldb, ac->msg, "objectclass", "group") != NULL) { return samldb_fill_object(ac, "group"); } /* perhaps a foreignSecurityPrincipal? */ if (samdb_find_attribute(ldb, ac->msg, "objectclass", "foreignSecurityPrincipal") != NULL) { return samldb_fill_foreignSecurityPrincipal_object(ac); } if (samdb_find_attribute(ldb, ac->msg, "objectclass", "classSchema") != NULL) { ret = samldb_schema_info_update(ac); if (ret != LDB_SUCCESS) { talloc_free(ac); return ret; } return samldb_fill_object(ac, "classSchema"); } if (samdb_find_attribute(ldb, ac->msg, "objectclass", "attributeSchema") != NULL) { ret = samldb_schema_info_update(ac); if (ret != LDB_SUCCESS) { talloc_free(ac); return ret; } return samldb_fill_object(ac, "attributeSchema"); } talloc_free(ac); /* nothing matched, go on */ return ldb_next_request(module, req); } /* modify */ static int samldb_modify(struct ldb_module *module, struct ldb_request *req) { struct ldb_context *ldb; struct samldb_ctx *ac; struct ldb_message *msg; struct ldb_message_element *el, *el2; int ret; uint32_t account_type; if (ldb_dn_is_special(req->op.mod.message->dn)) { /* do not manipulate our control entries */ return ldb_next_request(module, req); } ldb = ldb_module_get_ctx(module); if (ldb_msg_find_element(req->op.mod.message, "sAMAccountType") != NULL) { ldb_asprintf_errstring(ldb, "sAMAccountType must not be specified!"); return LDB_ERR_UNWILLING_TO_PERFORM; } /* msDS-IntId is not allowed to be modified * except when modification comes from replication */ if (ldb_msg_find_element(req->op.mod.message, "msDS-IntId")) { if (!ldb_request_get_control(req, DSDB_CONTROL_REPLICATED_UPDATE_OID)) { return LDB_ERR_CONSTRAINT_VIOLATION; } } ac = samldb_ctx_init(module, req); if (ac == NULL) { return ldb_operr(ldb); } /* TODO: do not modify original request, create a new one */ el = ldb_msg_find_element(req->op.mod.message, "groupType"); if (el && (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_REPLACE) && el->num_values == 1) { uint32_t group_type; req->op.mod.message = msg = ldb_msg_copy_shallow(req, req->op.mod.message); group_type = strtoul((const char *)el->values[0].data, NULL, 0); account_type = ds_gtype2atype(group_type); ret = samdb_msg_add_uint(ldb, msg, msg, "sAMAccountType", account_type); if (ret != LDB_SUCCESS) { return ret; } el2 = ldb_msg_find_element(msg, "sAMAccountType"); el2->flags = LDB_FLAG_MOD_REPLACE; } if (el && (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_DELETE)) { return LDB_ERR_UNWILLING_TO_PERFORM; } el = ldb_msg_find_element(req->op.mod.message, "primaryGroupID"); if (el && (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_REPLACE) && el->num_values == 1) { req->op.mod.message = ac->msg = ldb_msg_copy_shallow(req, req->op.mod.message); ret = samldb_prim_group_change(ac); if (ret != LDB_SUCCESS) { return ret; } } if (el && (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_DELETE)) { return LDB_ERR_UNWILLING_TO_PERFORM; } el = ldb_msg_find_element(req->op.mod.message, "userAccountControl"); if (el && (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_REPLACE) && el->num_values == 1) { uint32_t user_account_control; req->op.mod.message = msg = ldb_msg_copy_shallow(req, req->op.mod.message); user_account_control = strtoul((const char *)el->values[0].data, NULL, 0); account_type = ds_uf2atype(user_account_control); ret = samdb_msg_add_uint(ldb, msg, msg, "sAMAccountType", account_type); if (ret != LDB_SUCCESS) { return ret; } el2 = ldb_msg_find_element(msg, "sAMAccountType"); el2->flags = LDB_FLAG_MOD_REPLACE; if (user_account_control & (UF_SERVER_TRUST_ACCOUNT | UF_PARTIAL_SECRETS_ACCOUNT)) { ret = samdb_msg_add_string(ldb, msg, msg, "isCriticalSystemObject", "TRUE"); if (ret != LDB_SUCCESS) { return ret; } el2 = ldb_msg_find_element(msg, "isCriticalSystemObject"); el2->flags = LDB_FLAG_MOD_REPLACE; } if (!ldb_msg_find_element(msg, "primaryGroupID")) { uint32_t rid = ds_uf2prim_group_rid(user_account_control); ret = samdb_msg_add_uint(ldb, msg, msg, "primaryGroupID", rid); if (ret != LDB_SUCCESS) { return ret; } el2 = ldb_msg_find_element(msg, "primaryGroupID"); el2->flags = LDB_FLAG_MOD_REPLACE; } } if (el && (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_DELETE)) { return LDB_ERR_UNWILLING_TO_PERFORM; } el = ldb_msg_find_element(req->op.mod.message, "member"); if (el && el->flags & (LDB_FLAG_MOD_ADD|LDB_FLAG_MOD_REPLACE) && el->num_values == 1) { req->op.mod.message = ac->msg = ldb_msg_copy_shallow(req, req->op.mod.message); ret = samldb_member_check(ac); if (ret != LDB_SUCCESS) { return ret; } } return ldb_next_request(module, req); } /* delete */ static int samldb_prim_group_users_check(struct samldb_ctx *ac) { struct ldb_context *ldb; struct dom_sid *sid; uint32_t rid; NTSTATUS status; int count; ldb = ldb_module_get_ctx(ac->module); /* Finds out the SID/RID of the SAM object */ sid = samdb_search_dom_sid(ldb, ac, ac->req->op.del.dn, "objectSid", NULL); if (sid == NULL) { /* No SID - it might not be a SAM object - therefore ok */ return LDB_SUCCESS; } status = dom_sid_split_rid(ac, sid, NULL, &rid); if (!NT_STATUS_IS_OK(status)) { return ldb_operr(ldb); } if (rid == 0) { /* Special object (security principal?) */ return LDB_SUCCESS; } /* Deny delete requests from groups which are primary ones */ count = samdb_search_count(ldb, NULL, "(&(primaryGroupID=%u)(objectClass=user))", rid); if (count < 0) { return ldb_operr(ldb); } if (count > 0) { return LDB_ERR_ENTRY_ALREADY_EXISTS; } return LDB_SUCCESS; } static int samldb_delete(struct ldb_module *module, struct ldb_request *req) { struct samldb_ctx *ac; int ret; if (ldb_dn_is_special(req->op.del.dn)) { /* do not manipulate our control entries */ return ldb_next_request(module, req); } ac = samldb_ctx_init(module, req); if (ac == NULL) { return ldb_operr(ldb_module_get_ctx(module)); } ret = samldb_prim_group_users_check(ac); if (ret != LDB_SUCCESS) { return ret; } talloc_free(ac); return ldb_next_request(module, req); } /* extended */ static int samldb_extended_allocate_rid_pool(struct ldb_module *module, struct ldb_request *req) { struct ldb_context *ldb = ldb_module_get_ctx(module); struct dsdb_fsmo_extended_op *exop; int ret; exop = talloc_get_type(req->op.extended.data, struct dsdb_fsmo_extended_op); if (!exop) { ldb_debug(ldb, LDB_DEBUG_FATAL, "samldb_extended_allocate_rid_pool: invalid extended data\n"); return LDB_ERR_PROTOCOL_ERROR; } ret = ridalloc_allocate_rid_pool_fsmo(module, exop); if (ret != LDB_SUCCESS) { return ret; } return ldb_module_done(req, NULL, NULL, LDB_SUCCESS); } static int samldb_extended(struct ldb_module *module, struct ldb_request *req) { if (strcmp(req->op.extended.oid, DSDB_EXTENDED_ALLOCATE_RID_POOL) == 0) { return samldb_extended_allocate_rid_pool(module, req); } return ldb_next_request(module, req); } _PUBLIC_ const struct ldb_module_ops ldb_samldb_module_ops = { .name = "samldb", .add = samldb_add, .modify = samldb_modify, .del = samldb_delete, .extended = samldb_extended };