/*
Unix SMB/CIFS implementation.
implement the DSGetNCChanges call
Copyright (C) Anatoliy Atanasov 2009
Copyright (C) Andrew Tridgell 2009
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 .
*/
#include "includes.h"
#include "rpc_server/dcerpc_server.h"
#include "dsdb/samdb/samdb.h"
#include "param/param.h"
#include "librpc/gen_ndr/ndr_drsblobs.h"
#include "librpc/gen_ndr/ndr_drsuapi.h"
#include "librpc/gen_ndr/ndr_security.h"
#include "libcli/security/security.h"
#include "libcli/security/session.h"
#include "rpc_server/drsuapi/dcesrv_drsuapi.h"
#include "rpc_server/dcerpc_server_proto.h"
#include "../libcli/drsuapi/drsuapi.h"
#include "lib/util/binsearch.h"
#include "lib/util/tsort.h"
#include "auth/session.h"
#include "dsdb/common/util.h"
/*
build a DsReplicaObjectIdentifier from a ldb msg
*/
static struct drsuapi_DsReplicaObjectIdentifier *get_object_identifier(TALLOC_CTX *mem_ctx,
struct ldb_message *msg)
{
struct drsuapi_DsReplicaObjectIdentifier *identifier;
struct dom_sid *sid;
identifier = talloc(mem_ctx, struct drsuapi_DsReplicaObjectIdentifier);
if (identifier == NULL) {
return NULL;
}
identifier->dn = ldb_dn_alloc_linearized(identifier, msg->dn);
identifier->guid = samdb_result_guid(msg, "objectGUID");
sid = samdb_result_dom_sid(identifier, msg, "objectSid");
if (sid) {
identifier->sid = *sid;
} else {
ZERO_STRUCT(identifier->sid);
}
return identifier;
}
static int udv_compare(const struct GUID *guid1, struct GUID guid2)
{
return GUID_compare(guid1, &guid2);
}
/*
see if we can filter an attribute using the uptodateness_vector
*/
static bool udv_filter(const struct drsuapi_DsReplicaCursorCtrEx *udv,
const struct GUID *originating_invocation_id,
uint64_t originating_usn)
{
const struct drsuapi_DsReplicaCursor *c;
if (udv == NULL) return false;
BINARY_ARRAY_SEARCH(udv->cursors, udv->count, source_dsa_invocation_id,
originating_invocation_id, udv_compare, c);
if (c && originating_usn <= c->highest_usn) {
return true;
}
return false;
}
static int attid_cmp(enum drsuapi_DsAttributeId a1, enum drsuapi_DsAttributeId a2)
{
if (a1 == a2) return 0;
return ((uint32_t)a1) > ((uint32_t)a2) ? 1 : -1;
}
/*
check if an attribute is in a partial_attribute_set
*/
static bool check_partial_attribute_set(const struct dsdb_attribute *sa,
struct drsuapi_DsPartialAttributeSet *pas)
{
enum drsuapi_DsAttributeId *result;
BINARY_ARRAY_SEARCH_V(pas->attids, pas->num_attids, (enum drsuapi_DsAttributeId)sa->attributeID_id,
attid_cmp, result);
return result != NULL;
}
/*
drsuapi_DsGetNCChanges for one object
*/
static WERROR get_nc_changes_build_object(struct drsuapi_DsReplicaObjectListItemEx *obj,
struct ldb_message *msg,
struct ldb_context *sam_ctx,
struct ldb_dn *ncRoot_dn,
bool is_schema_nc,
struct dsdb_schema *schema,
DATA_BLOB *session_key,
uint64_t highest_usn,
uint32_t replica_flags,
struct drsuapi_DsPartialAttributeSet *partial_attribute_set,
struct drsuapi_DsReplicaCursorCtrEx *uptodateness_vector,
enum drsuapi_DsExtendedOperation extended_op)
{
const struct ldb_val *md_value;
uint32_t i, n;
struct replPropertyMetaDataBlob md;
uint32_t rid = 0;
enum ndr_err_code ndr_err;
uint32_t *attids;
const char *rdn;
const struct dsdb_attribute *rdn_sa;
unsigned int instanceType;
struct dsdb_syntax_ctx syntax_ctx;
/* make dsdb sytanx context for conversions */
dsdb_syntax_ctx_init(&syntax_ctx, sam_ctx, schema);
syntax_ctx.is_schema_nc = is_schema_nc;
instanceType = ldb_msg_find_attr_as_uint(msg, "instanceType", 0);
if (instanceType & INSTANCE_TYPE_IS_NC_HEAD) {
obj->is_nc_prefix = true;
obj->parent_object_guid = NULL;
} else {
obj->is_nc_prefix = false;
obj->parent_object_guid = talloc(obj, struct GUID);
if (obj->parent_object_guid == NULL) {
return WERR_DS_DRA_INTERNAL_ERROR;
}
*obj->parent_object_guid = samdb_result_guid(msg, "parentGUID");
if (GUID_all_zero(obj->parent_object_guid)) {
DEBUG(0,(__location__ ": missing parentGUID for %s\n",
ldb_dn_get_linearized(msg->dn)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
}
obj->next_object = NULL;
md_value = ldb_msg_find_ldb_val(msg, "replPropertyMetaData");
if (!md_value) {
/* nothing to send */
return WERR_OK;
}
if (instanceType & INSTANCE_TYPE_UNINSTANT) {
/* don't send uninstantiated objects */
return WERR_OK;
}
ndr_err = ndr_pull_struct_blob(md_value, obj, &md,
(ndr_pull_flags_fn_t)ndr_pull_replPropertyMetaDataBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
return WERR_DS_DRA_INTERNAL_ERROR;
}
if (md.version != 1) {
return WERR_DS_DRA_INTERNAL_ERROR;
}
rdn = ldb_dn_get_rdn_name(msg->dn);
if (rdn == NULL) {
DEBUG(0,(__location__ ": No rDN for %s\n", ldb_dn_get_linearized(msg->dn)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
rdn_sa = dsdb_attribute_by_lDAPDisplayName(schema, rdn);
if (rdn_sa == NULL) {
DEBUG(0,(__location__ ": Can't find dsds_attribute for rDN %s in %s\n",
rdn, ldb_dn_get_linearized(msg->dn)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
obj->meta_data_ctr = talloc(obj, struct drsuapi_DsReplicaMetaDataCtr);
attids = talloc_array(obj, uint32_t, md.ctr.ctr1.count);
obj->object.identifier = get_object_identifier(obj, msg);
if (obj->object.identifier == NULL) {
return WERR_NOMEM;
}
dom_sid_split_rid(NULL, &obj->object.identifier->sid, NULL, &rid);
obj->meta_data_ctr->meta_data = talloc_array(obj, struct drsuapi_DsReplicaMetaData, md.ctr.ctr1.count);
for (n=i=0; iattributeID_id) continue;
sa = dsdb_attribute_by_attributeID_id(schema, md.ctr.ctr1.array[i].attid);
if (!sa) {
DEBUG(0,(__location__ ": Failed to find attribute in schema for attrid %u mentioned in replPropertyMetaData of %s\n",
(unsigned int)md.ctr.ctr1.array[i].attid,
ldb_dn_get_linearized(msg->dn)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
if (sa->linkID) {
struct ldb_message_element *el;
el = ldb_msg_find_element(msg, sa->lDAPDisplayName);
if (el && el->num_values && dsdb_dn_is_upgraded_link_val(&el->values[0])) {
/* don't send upgraded links inline */
continue;
}
}
if (extended_op == DRSUAPI_EXOP_REPL_SECRET &&
!dsdb_attr_in_rodc_fas(sa)) {
force_attribute = true;
DEBUG(4,("Forcing attribute %s in %s\n",
sa->lDAPDisplayName, ldb_dn_get_linearized(msg->dn)));
}
/* filter by uptodateness_vector */
if (md.ctr.ctr1.array[i].attid != DRSUAPI_ATTID_instanceType &&
!force_attribute &&
udv_filter(uptodateness_vector,
&md.ctr.ctr1.array[i].originating_invocation_id,
md.ctr.ctr1.array[i].originating_usn)) {
continue;
}
/* filter by partial_attribute_set */
if (partial_attribute_set && !check_partial_attribute_set(sa, partial_attribute_set)) {
continue;
}
obj->meta_data_ctr->meta_data[n].originating_change_time = md.ctr.ctr1.array[i].originating_change_time;
obj->meta_data_ctr->meta_data[n].version = md.ctr.ctr1.array[i].version;
obj->meta_data_ctr->meta_data[n].originating_invocation_id = md.ctr.ctr1.array[i].originating_invocation_id;
obj->meta_data_ctr->meta_data[n].originating_usn = md.ctr.ctr1.array[i].originating_usn;
attids[n] = md.ctr.ctr1.array[i].attid;
n++;
}
/* ignore it if its an empty change. Note that renames always
* change the 'name' attribute, so they won't be ignored by
* this */
if (n == 0 ||
(n == 1 && attids[0] == DRSUAPI_ATTID_instanceType)) {
talloc_free(obj->meta_data_ctr);
obj->meta_data_ctr = NULL;
return WERR_OK;
}
obj->meta_data_ctr->count = n;
obj->object.flags = DRSUAPI_DS_REPLICA_OBJECT_FROM_MASTER;
obj->object.attribute_ctr.num_attributes = obj->meta_data_ctr->count;
obj->object.attribute_ctr.attributes = talloc_array(obj, struct drsuapi_DsReplicaAttribute,
obj->object.attribute_ctr.num_attributes);
/*
* Note that the meta_data array and the attributes array must
* be the same size and in the same order
*/
for (i=0; iobject.attribute_ctr.num_attributes; i++) {
struct ldb_message_element *el;
WERROR werr;
const struct dsdb_attribute *sa;
sa = dsdb_attribute_by_attributeID_id(schema, attids[i]);
if (!sa) {
DEBUG(0,("Unable to find attributeID %u in schema\n", attids[i]));
return WERR_DS_DRA_INTERNAL_ERROR;
}
el = ldb_msg_find_element(msg, sa->lDAPDisplayName);
if (el == NULL) {
/* this happens for attributes that have been removed */
DEBUG(5,("No element '%s' for attributeID %u in message\n",
sa->lDAPDisplayName, attids[i]));
ZERO_STRUCT(obj->object.attribute_ctr.attributes[i]);
obj->object.attribute_ctr.attributes[i].attid =
dsdb_attribute_get_attid(sa, syntax_ctx.is_schema_nc);
} else {
werr = sa->syntax->ldb_to_drsuapi(&syntax_ctx, sa, el, obj,
&obj->object.attribute_ctr.attributes[i]);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,("Unable to convert %s to DRS object - %s\n",
sa->lDAPDisplayName, win_errstr(werr)));
return werr;
}
/* if DRSUAPI_DRS_SPECIAL_SECRET_PROCESSING is set
* check if attribute is secret and send a null value
*/
if (replica_flags & DRSUAPI_DRS_SPECIAL_SECRET_PROCESSING) {
drsuapi_process_secret_attribute(&obj->object.attribute_ctr.attributes[i],
&obj->meta_data_ctr->meta_data[i]);
}
/* some attributes needs to be encrypted
before being sent */
werr = drsuapi_encrypt_attribute(obj, session_key, rid,
&obj->object.attribute_ctr.attributes[i]);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,("Unable to encrypt %s in DRS object - %s\n",
sa->lDAPDisplayName, win_errstr(werr)));
return werr;
}
}
}
return WERR_OK;
}
/*
add one linked attribute from an object to the list of linked
attributes in a getncchanges request
*/
static WERROR get_nc_changes_add_la(TALLOC_CTX *mem_ctx,
struct ldb_context *sam_ctx,
const struct dsdb_schema *schema,
const struct dsdb_attribute *sa,
struct ldb_message *msg,
struct dsdb_dn *dsdb_dn,
struct drsuapi_DsReplicaLinkedAttribute **la_list,
uint32_t *la_count)
{
struct drsuapi_DsReplicaLinkedAttribute *la;
bool active;
NTSTATUS status;
WERROR werr;
(*la_list) = talloc_realloc(mem_ctx, *la_list, struct drsuapi_DsReplicaLinkedAttribute, (*la_count)+1);
W_ERROR_HAVE_NO_MEMORY(*la_list);
la = &(*la_list)[*la_count];
la->identifier = get_object_identifier(*la_list, msg);
W_ERROR_HAVE_NO_MEMORY(la->identifier);
active = (dsdb_dn_rmd_flags(dsdb_dn->dn) & DSDB_RMD_FLAG_DELETED) == 0;
la->attid = sa->attributeID_id;
la->flags = active?DRSUAPI_DS_LINKED_ATTRIBUTE_FLAG_ACTIVE:0;
status = dsdb_get_extended_dn_nttime(dsdb_dn->dn, &la->originating_add_time, "RMD_ADDTIME");
if (!NT_STATUS_IS_OK(status)) {
return ntstatus_to_werror(status);
}
status = dsdb_get_extended_dn_uint32(dsdb_dn->dn, &la->meta_data.version, "RMD_VERSION");
if (!NT_STATUS_IS_OK(status)) {
return ntstatus_to_werror(status);
}
status = dsdb_get_extended_dn_nttime(dsdb_dn->dn, &la->meta_data.originating_change_time, "RMD_CHANGETIME");
if (!NT_STATUS_IS_OK(status)) {
return ntstatus_to_werror(status);
}
status = dsdb_get_extended_dn_guid(dsdb_dn->dn, &la->meta_data.originating_invocation_id, "RMD_INVOCID");
if (!NT_STATUS_IS_OK(status)) {
return ntstatus_to_werror(status);
}
status = dsdb_get_extended_dn_uint64(dsdb_dn->dn, &la->meta_data.originating_usn, "RMD_ORIGINATING_USN");
if (!NT_STATUS_IS_OK(status)) {
return ntstatus_to_werror(status);
}
werr = dsdb_dn_la_to_blob(sam_ctx, sa, schema, *la_list, dsdb_dn, &la->value.blob);
W_ERROR_NOT_OK_RETURN(werr);
(*la_count)++;
return WERR_OK;
}
/*
add linked attributes from an object to the list of linked
attributes in a getncchanges request
*/
static WERROR get_nc_changes_add_links(struct ldb_context *sam_ctx,
TALLOC_CTX *mem_ctx,
struct ldb_dn *ncRoot_dn,
struct dsdb_schema *schema,
uint64_t highest_usn,
uint32_t replica_flags,
struct ldb_message *msg,
struct drsuapi_DsReplicaLinkedAttribute **la_list,
uint32_t *la_count,
struct drsuapi_DsReplicaCursorCtrEx *uptodateness_vector)
{
unsigned int i;
TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
uint64_t uSNChanged = ldb_msg_find_attr_as_int(msg, "uSNChanged", -1);
for (i=0; inum_elements; i++) {
struct ldb_message_element *el = &msg->elements[i];
const struct dsdb_attribute *sa;
unsigned int j;
sa = dsdb_attribute_by_lDAPDisplayName(schema, el->name);
if (!sa || sa->linkID == 0 || (sa->linkID & 1)) {
/* we only want forward links */
continue;
}
if (el->num_values && !dsdb_dn_is_upgraded_link_val(&el->values[0])) {
/* its an old style link, it will have been
* sent in the main replication data */
continue;
}
for (j=0; jnum_values; j++) {
struct dsdb_dn *dsdb_dn;
uint64_t local_usn;
NTSTATUS status;
WERROR werr;
dsdb_dn = dsdb_dn_parse(tmp_ctx, sam_ctx, &el->values[j], sa->syntax->ldap_oid);
if (dsdb_dn == NULL) {
DEBUG(1,(__location__ ": Failed to parse DN for %s in %s\n",
el->name, ldb_dn_get_linearized(msg->dn)));
talloc_free(tmp_ctx);
return WERR_DS_DRA_INTERNAL_ERROR;
}
status = dsdb_get_extended_dn_uint64(dsdb_dn->dn, &local_usn, "RMD_LOCAL_USN");
if (!NT_STATUS_IS_OK(status)) {
/* this can happen for attributes
given to us with old style meta
data */
continue;
}
if (local_usn > uSNChanged) {
DEBUG(1,(__location__ ": uSNChanged less than RMD_LOCAL_USN for %s on %s\n",
el->name, ldb_dn_get_linearized(msg->dn)));
talloc_free(tmp_ctx);
return WERR_DS_DRA_INTERNAL_ERROR;
}
if (local_usn < highest_usn) {
continue;
}
werr = get_nc_changes_add_la(mem_ctx, sam_ctx, schema, sa, msg,
dsdb_dn, la_list, la_count);
if (!W_ERROR_IS_OK(werr)) {
talloc_free(tmp_ctx);
return werr;
}
}
}
talloc_free(tmp_ctx);
return WERR_OK;
}
/*
fill in the cursors return based on the replUpToDateVector for the ncRoot_dn
*/
static WERROR get_nc_changes_udv(struct ldb_context *sam_ctx,
struct ldb_dn *ncRoot_dn,
struct drsuapi_DsReplicaCursor2CtrEx *udv)
{
int ret;
udv->version = 2;
udv->reserved1 = 0;
udv->reserved2 = 0;
ret = dsdb_load_udv_v2(sam_ctx, ncRoot_dn, udv, &udv->cursors, &udv->count);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to load UDV for %s - %s\n",
ldb_dn_get_linearized(ncRoot_dn), ldb_errstring(sam_ctx)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
return WERR_OK;
}
/* comparison function for linked attributes - see CompareLinks() in
* MS-DRSR section 4.1.10.5.17 */
static int linked_attribute_compare(const struct drsuapi_DsReplicaLinkedAttribute *la1,
const struct drsuapi_DsReplicaLinkedAttribute *la2,
struct ldb_context *sam_ctx)
{
int c;
WERROR werr;
TALLOC_CTX *tmp_ctx;
const struct dsdb_schema *schema;
const struct dsdb_attribute *schema_attrib;
struct dsdb_dn *dn1, *dn2;
struct GUID guid1, guid2;
NTSTATUS status;
c = GUID_compare(&la1->identifier->guid,
&la2->identifier->guid);
if (c != 0) return c;
if (la1->attid != la2->attid) {
return la1->attid < la2->attid? -1:1;
}
if ((la1->flags & DRSUAPI_DS_LINKED_ATTRIBUTE_FLAG_ACTIVE) !=
(la2->flags & DRSUAPI_DS_LINKED_ATTRIBUTE_FLAG_ACTIVE)) {
return (la1->flags & DRSUAPI_DS_LINKED_ATTRIBUTE_FLAG_ACTIVE)? 1:-1;
}
/* we need to get the target GUIDs to compare */
tmp_ctx = talloc_new(sam_ctx);
schema = dsdb_get_schema(sam_ctx, tmp_ctx);
schema_attrib = dsdb_attribute_by_attributeID_id(schema, la1->attid);
werr = dsdb_dn_la_from_blob(sam_ctx, schema_attrib, schema, tmp_ctx, la1->value.blob, &dn1);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,(__location__ ": Bad la1 blob in sort\n"));
talloc_free(tmp_ctx);
return 0;
}
werr = dsdb_dn_la_from_blob(sam_ctx, schema_attrib, schema, tmp_ctx, la2->value.blob, &dn2);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,(__location__ ": Bad la2 blob in sort\n"));
talloc_free(tmp_ctx);
return 0;
}
status = dsdb_get_extended_dn_guid(dn1->dn, &guid1, "GUID");
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,(__location__ ": Bad la1 guid in sort\n"));
talloc_free(tmp_ctx);
return 0;
}
status = dsdb_get_extended_dn_guid(dn2->dn, &guid2, "GUID");
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,(__location__ ": Bad la2 guid in sort\n"));
talloc_free(tmp_ctx);
return 0;
}
talloc_free(tmp_ctx);
return GUID_compare(&guid1, &guid2);
}
/*
sort the objects we send by tree order
*/
static int site_res_cmp_parent_order(struct ldb_message **m1, struct ldb_message **m2)
{
return ldb_dn_compare((*m2)->dn, (*m1)->dn);
}
/*
sort the objects we send first by uSNChanged
*/
static int site_res_cmp_usn_order(struct ldb_message **m1, struct ldb_message **m2)
{
unsigned usnchanged1, usnchanged2;
unsigned cn1, cn2;
cn1 = ldb_dn_get_comp_num((*m1)->dn);
cn2 = ldb_dn_get_comp_num((*m2)->dn);
if (cn1 != cn2) {
return cn1 > cn2 ? 1 : -1;
}
usnchanged1 = ldb_msg_find_attr_as_uint(*m1, "uSNChanged", 0);
usnchanged2 = ldb_msg_find_attr_as_uint(*m2, "uSNChanged", 0);
if (usnchanged1 == usnchanged2) {
return 0;
}
return usnchanged1 > usnchanged2 ? 1 : -1;
}
/*
handle a DRSUAPI_EXOP_FSMO_RID_ALLOC call
*/
static WERROR getncchanges_rid_alloc(struct drsuapi_bind_state *b_state,
TALLOC_CTX *mem_ctx,
struct drsuapi_DsGetNCChangesRequest10 *req10,
struct drsuapi_DsGetNCChangesCtr6 *ctr6)
{
struct ldb_dn *rid_manager_dn, *fsmo_role_dn, *req_dn;
int ret;
struct ldb_context *ldb = b_state->sam_ctx;
struct ldb_result *ext_res;
struct ldb_dn *base_dn;
struct dsdb_fsmo_extended_op *exop;
/*
steps:
- verify that the DN being asked for is the RID Manager DN
- verify that we are the RID Manager
*/
/* work out who is the RID Manager */
ret = samdb_rid_manager_dn(ldb, mem_ctx, &rid_manager_dn);
if (ret != LDB_SUCCESS) {
DEBUG(0, (__location__ ": Failed to find RID Manager object - %s\n", ldb_errstring(ldb)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
req_dn = drs_ObjectIdentifier_to_dn(mem_ctx, ldb, req10->naming_context);
if (!req_dn ||
!ldb_dn_validate(req_dn) ||
ldb_dn_compare(req_dn, rid_manager_dn) != 0) {
/* that isn't the RID Manager DN */
DEBUG(0,(__location__ ": RID Alloc request for wrong DN %s\n",
drs_ObjectIdentifier_to_string(mem_ctx, req10->naming_context)));
ctr6->extended_ret = DRSUAPI_EXOP_ERR_MISMATCH;
return WERR_OK;
}
/* find the DN of the RID Manager */
ret = samdb_reference_dn(ldb, mem_ctx, rid_manager_dn, "fSMORoleOwner", &fsmo_role_dn);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to find fSMORoleOwner in RID Manager object - %s\n",
ldb_errstring(ldb)));
ctr6->extended_ret = DRSUAPI_EXOP_ERR_FSMO_NOT_OWNER;
return WERR_DS_DRA_INTERNAL_ERROR;
}
if (ldb_dn_compare(samdb_ntds_settings_dn(ldb), fsmo_role_dn) != 0) {
/* we're not the RID Manager - go away */
DEBUG(0,(__location__ ": RID Alloc request when not RID Manager\n"));
ctr6->extended_ret = DRSUAPI_EXOP_ERR_FSMO_NOT_OWNER;
return WERR_OK;
}
exop = talloc(mem_ctx, struct dsdb_fsmo_extended_op);
W_ERROR_HAVE_NO_MEMORY(exop);
exop->fsmo_info = req10->fsmo_info;
exop->destination_dsa_guid = req10->destination_dsa_guid;
ret = ldb_transaction_start(ldb);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed transaction start - %s\n",
ldb_errstring(ldb)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
/*
* FIXME (kim): this is a temp hack to return just few object,
* but not the whole domain NC.
* We should remove this hack and implement a 'scope'
* building function to return just the set of object
* documented for DRSUAPI_EXOP_FSMO_RID_ALLOC extended_op
*/
ldb_sequence_number(ldb, LDB_SEQ_HIGHEST_SEQ, &req10->highwatermark.highest_usn);
ret = ldb_extended(ldb, DSDB_EXTENDED_ALLOCATE_RID_POOL, exop, &ext_res);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed extended allocation RID pool operation - %s\n",
ldb_errstring(ldb)));
ldb_transaction_cancel(ldb);
return WERR_DS_DRA_INTERNAL_ERROR;
}
ret = ldb_transaction_commit(ldb);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed transaction commit - %s\n",
ldb_errstring(ldb)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
talloc_free(ext_res);
base_dn = ldb_get_default_basedn(ldb);
DEBUG(2,("Allocated RID pool for server %s\n",
GUID_string(mem_ctx, &req10->destination_dsa_guid)));
ctr6->extended_ret = DRSUAPI_EXOP_ERR_SUCCESS;
return WERR_OK;
}
/*
return an array of SIDs from a ldb_message given an attribute name
assumes the SIDs are in extended DN format
*/
static WERROR samdb_result_sid_array_dn(struct ldb_context *sam_ctx,
struct ldb_message *msg,
TALLOC_CTX *mem_ctx,
const char *attr,
const struct dom_sid ***sids)
{
struct ldb_message_element *el;
unsigned int i;
el = ldb_msg_find_element(msg, attr);
if (!el) {
*sids = NULL;
return WERR_OK;
}
(*sids) = talloc_array(mem_ctx, const struct dom_sid *, el->num_values + 1);
W_ERROR_HAVE_NO_MEMORY(*sids);
for (i=0; inum_values; i++) {
struct ldb_dn *dn = ldb_dn_from_ldb_val(mem_ctx, sam_ctx, &el->values[i]);
NTSTATUS status;
struct dom_sid *sid;
sid = talloc(*sids, struct dom_sid);
W_ERROR_HAVE_NO_MEMORY(sid);
status = dsdb_get_extended_dn_sid(dn, sid, "SID");
if (!NT_STATUS_IS_OK(status)) {
return WERR_INTERNAL_DB_CORRUPTION;
}
(*sids)[i] = sid;
}
(*sids)[i] = NULL;
return WERR_OK;
}
/*
return an array of SIDs from a ldb_message given an attribute name
assumes the SIDs are in NDR form
*/
static WERROR samdb_result_sid_array_ndr(struct ldb_context *sam_ctx,
struct ldb_message *msg,
TALLOC_CTX *mem_ctx,
const char *attr,
const struct dom_sid ***sids)
{
struct ldb_message_element *el;
unsigned int i;
el = ldb_msg_find_element(msg, attr);
if (!el) {
*sids = NULL;
return WERR_OK;
}
(*sids) = talloc_array(mem_ctx, const struct dom_sid *, el->num_values + 1);
W_ERROR_HAVE_NO_MEMORY(*sids);
for (i=0; inum_values; i++) {
enum ndr_err_code ndr_err;
struct dom_sid *sid;
sid = talloc(*sids, struct dom_sid);
W_ERROR_HAVE_NO_MEMORY(sid);
ndr_err = ndr_pull_struct_blob(&el->values[i], sid, sid,
(ndr_pull_flags_fn_t)ndr_pull_dom_sid);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
return WERR_INTERNAL_DB_CORRUPTION;
}
(*sids)[i] = sid;
}
(*sids)[i] = NULL;
return WERR_OK;
}
/*
see if any SIDs in list1 are in list2
*/
static bool sid_list_match(const struct dom_sid **list1, const struct dom_sid **list2)
{
unsigned int i, j;
/* do we ever have enough SIDs here to worry about O(n^2) ? */
for (i=0; list1[i]; i++) {
for (j=0; list2[j]; j++) {
if (dom_sid_equal(list1[i], list2[j])) {
return true;
}
}
}
return false;
}
/*
handle a DRSUAPI_EXOP_REPL_SECRET call
*/
static WERROR getncchanges_repl_secret(struct drsuapi_bind_state *b_state,
TALLOC_CTX *mem_ctx,
struct drsuapi_DsGetNCChangesRequest10 *req10,
struct dom_sid *user_sid,
struct drsuapi_DsGetNCChangesCtr6 *ctr6)
{
struct drsuapi_DsReplicaObjectIdentifier *ncRoot = req10->naming_context;
struct ldb_dn *obj_dn, *rodc_dn, *krbtgt_link_dn;
int ret;
const char *rodc_attrs[] = { "msDS-KrbTgtLink", "msDS-NeverRevealGroup", "msDS-RevealOnDemandGroup", NULL };
const char *obj_attrs[] = { "tokenGroups", "objectSid", "UserAccountControl", "msDS-KrbTgtLinkBL", NULL };
struct ldb_result *rodc_res, *obj_res;
const struct dom_sid **never_reveal_sids, **reveal_sids, **token_sids;
WERROR werr;
DEBUG(3,(__location__ ": DRSUAPI_EXOP_REPL_SECRET extended op on %s\n",
drs_ObjectIdentifier_to_string(mem_ctx, ncRoot)));
/*
* we need to work out if we will allow this RODC to
* replicate the secrets for this object
*
* see 4.1.10.5.14 GetRevealSecretsPolicyForUser for details
* of this function
*/
if (b_state->sam_ctx_system == NULL) {
/* this operation needs system level access */
ctr6->extended_ret = DRSUAPI_EXOP_ERR_ACCESS_DENIED;
return WERR_DS_DRA_SOURCE_DISABLED;
}
obj_dn = drs_ObjectIdentifier_to_dn(mem_ctx, b_state->sam_ctx_system, ncRoot);
if (!ldb_dn_validate(obj_dn)) goto failed;
rodc_dn = ldb_dn_new_fmt(mem_ctx, b_state->sam_ctx_system, "",
dom_sid_string(mem_ctx, user_sid));
if (!ldb_dn_validate(rodc_dn)) goto failed;
/* do the two searches we need */
ret = dsdb_search_dn(b_state->sam_ctx_system, mem_ctx, &rodc_res, rodc_dn, rodc_attrs,
DSDB_SEARCH_SHOW_EXTENDED_DN);
if (ret != LDB_SUCCESS || rodc_res->count != 1) goto failed;
ret = dsdb_search_dn(b_state->sam_ctx_system, mem_ctx, &obj_res, obj_dn, obj_attrs, 0);
if (ret != LDB_SUCCESS || obj_res->count != 1) goto failed;
/* if the object SID is equal to the user_sid, allow */
if (dom_sid_equal(user_sid,
samdb_result_dom_sid(mem_ctx, obj_res->msgs[0], "objectSid"))) {
goto allowed;
}
/* an RODC is allowed to get its own krbtgt account secrets */
krbtgt_link_dn = samdb_result_dn(b_state->sam_ctx_system, mem_ctx,
rodc_res->msgs[0], "msDS-KrbTgtLink", NULL);
if (krbtgt_link_dn != NULL &&
ldb_dn_compare(obj_dn, krbtgt_link_dn) == 0) {
goto allowed;
}
/* but it isn't allowed to get anyone elses krbtgt secrets */
if (samdb_result_dn(b_state->sam_ctx_system, mem_ctx,
obj_res->msgs[0], "msDS-KrbTgtLinkBL", NULL)) {
goto denied;
}
if (ldb_msg_find_attr_as_uint(obj_res->msgs[0],
"userAccountControl", 0) &
UF_INTERDOMAIN_TRUST_ACCOUNT) {
goto denied;
}
werr = samdb_result_sid_array_dn(b_state->sam_ctx_system, rodc_res->msgs[0],
mem_ctx, "msDS-NeverRevealGroup", &never_reveal_sids);
if (!W_ERROR_IS_OK(werr)) {
goto denied;
}
werr = samdb_result_sid_array_dn(b_state->sam_ctx_system, rodc_res->msgs[0],
mem_ctx, "msDS-RevealOnDemandGroup", &reveal_sids);
if (!W_ERROR_IS_OK(werr)) {
goto denied;
}
werr = samdb_result_sid_array_ndr(b_state->sam_ctx_system, obj_res->msgs[0],
mem_ctx, "tokenGroups", &token_sids);
if (!W_ERROR_IS_OK(werr) || token_sids==NULL) {
goto denied;
}
if (never_reveal_sids &&
sid_list_match(token_sids, never_reveal_sids)) {
goto denied;
}
if (reveal_sids &&
sid_list_match(token_sids, reveal_sids)) {
goto allowed;
}
/* default deny */
denied:
DEBUG(2,(__location__ ": Denied RODC secret replication for %s by RODC %s\n",
ldb_dn_get_linearized(obj_dn), ldb_dn_get_linearized(rodc_res->msgs[0]->dn)));
ctr6->extended_ret = DRSUAPI_EXOP_ERR_NONE;
return WERR_DS_DRA_ACCESS_DENIED;
allowed:
DEBUG(2,(__location__ ": Allowed RODC secret replication for %s by RODC %s\n",
ldb_dn_get_linearized(obj_dn), ldb_dn_get_linearized(rodc_res->msgs[0]->dn)));
ctr6->extended_ret = DRSUAPI_EXOP_ERR_SUCCESS;
req10->highwatermark.highest_usn = 0;
return WERR_OK;
failed:
DEBUG(2,(__location__ ": Failed RODC secret replication for %s by RODC %s\n",
ldb_dn_get_linearized(obj_dn), dom_sid_string(mem_ctx, user_sid)));
ctr6->extended_ret = DRSUAPI_EXOP_ERR_NONE;
return WERR_DS_DRA_BAD_DN;
}
/*
handle a DRSUAPI_EXOP_REPL_OBJ call
*/
static WERROR getncchanges_repl_obj(struct drsuapi_bind_state *b_state,
TALLOC_CTX *mem_ctx,
struct drsuapi_DsGetNCChangesRequest10 *req10,
struct dom_sid *user_sid,
struct drsuapi_DsGetNCChangesCtr6 *ctr6)
{
struct drsuapi_DsReplicaObjectIdentifier *ncRoot = req10->naming_context;
DEBUG(3,(__location__ ": DRSUAPI_EXOP_REPL_OBJ extended op on %s\n",
drs_ObjectIdentifier_to_string(mem_ctx, ncRoot)));
ctr6->extended_ret = DRSUAPI_EXOP_ERR_SUCCESS;
req10->highwatermark.highest_usn = 0;
return WERR_OK;
}
/*
handle DRSUAPI_EXOP_FSMO_REQ_ROLE,
DRSUAPI_EXOP_FSMO_RID_REQ_ROLE,
and DRSUAPI_EXOP_FSMO_REQ_PDC calls
*/
static WERROR getncchanges_change_master(struct drsuapi_bind_state *b_state,
TALLOC_CTX *mem_ctx,
struct drsuapi_DsGetNCChangesRequest10 *req10,
struct drsuapi_DsGetNCChangesCtr6 *ctr6)
{
struct ldb_dn *fsmo_role_dn, *req_dn, *ntds_dn;
int ret;
unsigned int i;
struct ldb_context *ldb = b_state->sam_ctx;
struct ldb_message *msg;
/*
steps:
- verify that the client dn exists
- verify that we are the current master
*/
req_dn = drs_ObjectIdentifier_to_dn(mem_ctx, ldb, req10->naming_context);
if (!req_dn ||
!ldb_dn_validate(req_dn)) {
/* that is not a valid dn */
DEBUG(0,(__location__ ": FSMO role transfer request for invalid DN %s\n",
drs_ObjectIdentifier_to_string(mem_ctx, req10->naming_context)));
ctr6->extended_ret = DRSUAPI_EXOP_ERR_MISMATCH;
return WERR_OK;
}
/* retrieve the current role owner */
ret = samdb_reference_dn(ldb, mem_ctx, req_dn, "fSMORoleOwner", &fsmo_role_dn);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to find fSMORoleOwner in context - %s\n",
ldb_errstring(ldb)));
ctr6->extended_ret = DRSUAPI_EXOP_ERR_FSMO_NOT_OWNER;
return WERR_DS_DRA_INTERNAL_ERROR;
}
if (ldb_dn_compare(samdb_ntds_settings_dn(ldb), fsmo_role_dn) != 0) {
/* we're not the current owner - go away */
DEBUG(0,(__location__ ": FSMO transfer request when not owner\n"));
ctr6->extended_ret = DRSUAPI_EXOP_ERR_FSMO_NOT_OWNER;
return WERR_OK;
}
/* change the current master */
msg = ldb_msg_new(ldb);
W_ERROR_HAVE_NO_MEMORY(msg);
msg->dn = drs_ObjectIdentifier_to_dn(msg, ldb, req10->naming_context);
W_ERROR_HAVE_NO_MEMORY(msg->dn);
ret = dsdb_find_dn_by_guid(ldb, msg, &req10->destination_dsa_guid, &ntds_dn);
if (ret != LDB_SUCCESS) {
DEBUG(0, (__location__ ": Unable to find NTDS object for guid %s - %s\n",
GUID_string(mem_ctx, &req10->destination_dsa_guid), ldb_errstring(ldb)));
talloc_free(msg);
return WERR_DS_DRA_INTERNAL_ERROR;
}
ret = ldb_msg_add_string(msg, "fSMORoleOwner", ldb_dn_get_linearized(ntds_dn));
if (ret != 0) {
talloc_free(msg);
return WERR_DS_DRA_INTERNAL_ERROR;
}
for (i=0;inum_elements;i++) {
msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
}
ret = ldb_transaction_start(ldb);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed transaction start - %s\n",
ldb_errstring(ldb)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
ret = ldb_modify(ldb, msg);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to change current owner - %s\n",
ldb_errstring(ldb)));
ldb_transaction_cancel(ldb);
return WERR_DS_DRA_INTERNAL_ERROR;
}
ret = ldb_transaction_commit(ldb);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed transaction commit - %s\n",
ldb_errstring(ldb)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
ctr6->extended_ret = DRSUAPI_EXOP_ERR_SUCCESS;
return WERR_OK;
}
/* state of a partially completed getncchanges call */
struct drsuapi_getncchanges_state {
struct GUID *guids;
uint32_t num_records;
uint32_t num_processed;
struct ldb_dn *ncRoot_dn;
bool is_schema_nc;
uint64_t min_usn;
uint64_t highest_usn;
struct ldb_dn *last_dn;
struct drsuapi_DsReplicaLinkedAttribute *la_list;
uint32_t la_count;
bool la_sorted;
uint32_t la_idx;
struct drsuapi_DsReplicaCursorCtrEx *uptodateness_vector;
};
/*
see if this getncchanges request includes a request to reveal secret information
*/
static WERROR dcesrv_drsuapi_is_reveal_secrets_request(struct drsuapi_bind_state *b_state,
struct drsuapi_DsGetNCChangesRequest10 *req10,
bool *is_secret_request)
{
enum drsuapi_DsExtendedOperation exop;
uint32_t i;
struct dsdb_schema *schema;
*is_secret_request = true;
exop = req10->extended_op;
switch (exop) {
case DRSUAPI_EXOP_FSMO_REQ_ROLE:
case DRSUAPI_EXOP_FSMO_RID_ALLOC:
case DRSUAPI_EXOP_FSMO_RID_REQ_ROLE:
case DRSUAPI_EXOP_FSMO_REQ_PDC:
case DRSUAPI_EXOP_FSMO_ABANDON_ROLE:
/* FSMO exops can reveal secrets */
*is_secret_request = true;
return WERR_OK;
case DRSUAPI_EXOP_REPL_SECRET:
case DRSUAPI_EXOP_REPL_OBJ:
case DRSUAPI_EXOP_NONE:
break;
}
if (req10->replica_flags & DRSUAPI_DRS_SPECIAL_SECRET_PROCESSING) {
*is_secret_request = false;
return WERR_OK;
}
if (exop == DRSUAPI_EXOP_REPL_SECRET ||
req10->partial_attribute_set == NULL) {
/* they want secrets */
*is_secret_request = true;
return WERR_OK;
}
schema = dsdb_get_schema(b_state->sam_ctx, NULL);
/* check the attributes they asked for */
for (i=0; ipartial_attribute_set->num_attids; i++) {
const struct dsdb_attribute *sa;
sa = dsdb_attribute_by_attributeID_id(schema, req10->partial_attribute_set->attids[i]);
if (sa == NULL) {
return WERR_DS_DRA_SCHEMA_MISMATCH;
}
if (!dsdb_attr_in_rodc_fas(sa)) {
*is_secret_request = true;
return WERR_OK;
}
}
/* check the attributes they asked for */
for (i=0; ipartial_attribute_set_ex->num_attids; i++) {
const struct dsdb_attribute *sa;
sa = dsdb_attribute_by_attributeID_id(schema, req10->partial_attribute_set_ex->attids[i]);
if (sa == NULL) {
return WERR_DS_DRA_SCHEMA_MISMATCH;
}
if (!dsdb_attr_in_rodc_fas(sa)) {
*is_secret_request = true;
return WERR_OK;
}
}
*is_secret_request = false;
return WERR_OK;
}
/*
map from req8 to req10
*/
static struct drsuapi_DsGetNCChangesRequest10 *
getncchanges_map_req8(TALLOC_CTX *mem_ctx,
struct drsuapi_DsGetNCChangesRequest8 *req8)
{
struct drsuapi_DsGetNCChangesRequest10 *req10 = talloc_zero(mem_ctx,
struct drsuapi_DsGetNCChangesRequest10);
if (req10 == NULL) {
return NULL;
}
req10->destination_dsa_guid = req8->destination_dsa_guid;
req10->source_dsa_invocation_id = req8->source_dsa_invocation_id;
req10->naming_context = req8->naming_context;
req10->highwatermark = req8->highwatermark;
req10->uptodateness_vector = req8->uptodateness_vector;
req10->replica_flags = req8->replica_flags;
req10->max_object_count = req8->max_object_count;
req10->max_ndr_size = req8->max_ndr_size;
req10->extended_op = req8->extended_op;
req10->fsmo_info = req8->fsmo_info;
req10->partial_attribute_set = req8->partial_attribute_set;
req10->partial_attribute_set_ex = req8->partial_attribute_set_ex;
req10->mapping_ctr = req8->mapping_ctr;
return req10;
}
/*
drsuapi_DsGetNCChanges
see MS-DRSR 4.1.10.5.2 for basic logic of this function
*/
WERROR dcesrv_drsuapi_DsGetNCChanges(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
struct drsuapi_DsGetNCChanges *r)
{
struct drsuapi_DsReplicaObjectIdentifier *ncRoot;
int ret;
uint32_t i;
struct dsdb_schema *schema;
struct drsuapi_DsReplicaOIDMapping_Ctr *ctr;
struct drsuapi_DsReplicaObjectListItemEx **currentObject;
NTSTATUS status;
DATA_BLOB session_key;
const char *attrs[] = { "uSNChanged",
"objectGUID" ,
NULL };
WERROR werr;
struct dcesrv_handle *h;
struct drsuapi_bind_state *b_state;
struct drsuapi_getncchanges_state *getnc_state;
struct drsuapi_DsGetNCChangesRequest10 *req10;
uint32_t options;
uint32_t max_objects;
uint32_t max_links;
uint32_t link_count = 0;
uint32_t link_total = 0;
uint32_t link_given = 0;
struct ldb_dn *search_dn = NULL;
bool am_rodc, null_scope=false;
enum security_user_level security_level;
struct ldb_context *sam_ctx;
struct dom_sid *user_sid;
bool is_secret_request;
DCESRV_PULL_HANDLE_WERR(h, r->in.bind_handle, DRSUAPI_BIND_HANDLE);
b_state = h->data;
sam_ctx = b_state->sam_ctx_system?b_state->sam_ctx_system:b_state->sam_ctx;
*r->out.level_out = 6;
/* TODO: linked attributes*/
r->out.ctr->ctr6.linked_attributes_count = 0;
r->out.ctr->ctr6.linked_attributes = NULL;
r->out.ctr->ctr6.object_count = 0;
r->out.ctr->ctr6.nc_object_count = 0;
r->out.ctr->ctr6.more_data = false;
r->out.ctr->ctr6.uptodateness_vector = NULL;
/* a RODC doesn't allow for any replication */
ret = samdb_rodc(sam_ctx, &am_rodc);
if (ret == LDB_SUCCESS && am_rodc) {
DEBUG(0,(__location__ ": DsGetNCChanges attempt on RODC\n"));
return WERR_DS_DRA_SOURCE_DISABLED;
}
/* Check request revision.
*/
switch (r->in.level) {
case 8:
req10 = getncchanges_map_req8(mem_ctx, &r->in.req->req8);
if (req10 == NULL) {
return WERR_NOMEM;
}
break;
case 10:
req10 = &r->in.req->req10;
break;
default:
DEBUG(0,(__location__ ": Request for DsGetNCChanges with unsupported level %u\n",
r->in.level));
return WERR_REVISION_MISMATCH;
}
/* Perform access checks. */
/* TODO: we need to support a sync on a specific non-root
* DN. We'll need to find the real partition root here */
ncRoot = req10->naming_context;
if (ncRoot == NULL) {
DEBUG(0,(__location__ ": Request for DsGetNCChanges with no NC\n"));
return WERR_DS_DRA_INVALID_PARAMETER;
}
if (samdb_ntds_options(sam_ctx, &options) != LDB_SUCCESS) {
return WERR_DS_DRA_INTERNAL_ERROR;
}
if ((options & DS_NTDSDSA_OPT_DISABLE_OUTBOUND_REPL) &&
!(req10->replica_flags & DRSUAPI_DRS_SYNC_FORCED)) {
return WERR_DS_DRA_SOURCE_DISABLED;
}
user_sid = &dce_call->conn->auth_state.session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
werr = drs_security_access_check_nc_root(b_state->sam_ctx,
mem_ctx,
dce_call->conn->auth_state.session_info->security_token,
req10->naming_context,
GUID_DRS_GET_CHANGES);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
werr = dcesrv_drsuapi_is_reveal_secrets_request(b_state, req10, &is_secret_request);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
if (is_secret_request && req10->extended_op != DRSUAPI_EXOP_REPL_SECRET) {
werr = drs_security_access_check_nc_root(b_state->sam_ctx,
mem_ctx,
dce_call->conn->auth_state.session_info->security_token,
req10->naming_context,
GUID_DRS_GET_ALL_CHANGES);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
}
/* for non-administrator replications, check that they have
given the correct source_dsa_invocation_id */
security_level = security_session_user_level(dce_call->conn->auth_state.session_info,
samdb_domain_sid(sam_ctx));
if (security_level == SECURITY_RO_DOMAIN_CONTROLLER) {
if (req10->replica_flags & DRSUAPI_DRS_WRIT_REP) {
/* we rely on this flag being unset for RODC requests */
req10->replica_flags &= ~DRSUAPI_DRS_WRIT_REP;
}
}
if (req10->replica_flags & DRSUAPI_DRS_FULL_SYNC_PACKET) {
/* Ignore the _in_ uptpdateness vector*/
req10->uptodateness_vector = NULL;
}
getnc_state = b_state->getncchanges_state;
/* see if a previous replication has been abandoned */
if (getnc_state) {
struct ldb_dn *new_dn = drs_ObjectIdentifier_to_dn(getnc_state, sam_ctx, ncRoot);
if (ldb_dn_compare(new_dn, getnc_state->ncRoot_dn) != 0) {
DEBUG(0,(__location__ ": DsGetNCChanges 2nd replication on different DN %s %s (last_dn %s)\n",
ldb_dn_get_linearized(new_dn),
ldb_dn_get_linearized(getnc_state->ncRoot_dn),
ldb_dn_get_linearized(getnc_state->last_dn)));
talloc_free(getnc_state);
getnc_state = NULL;
}
}
if (getnc_state == NULL) {
getnc_state = talloc_zero(b_state, struct drsuapi_getncchanges_state);
if (getnc_state == NULL) {
return WERR_NOMEM;
}
b_state->getncchanges_state = getnc_state;
getnc_state->ncRoot_dn = drs_ObjectIdentifier_to_dn(getnc_state, sam_ctx, ncRoot);
/* find out if we are to replicate Schema NC */
ret = ldb_dn_compare(getnc_state->ncRoot_dn,
ldb_get_schema_basedn(b_state->sam_ctx));
getnc_state->is_schema_nc = (0 == ret);
/*
* This is the first replication cycle and it is
* a good place to handle extended operations
*
* FIXME: we don't fully support extended operations yet
*/
switch (req10->extended_op) {
case DRSUAPI_EXOP_NONE:
break;
case DRSUAPI_EXOP_FSMO_RID_ALLOC:
werr = getncchanges_rid_alloc(b_state, mem_ctx, req10, &r->out.ctr->ctr6);
W_ERROR_NOT_OK_RETURN(werr);
search_dn = ldb_get_default_basedn(sam_ctx);
break;
case DRSUAPI_EXOP_REPL_SECRET:
werr = getncchanges_repl_secret(b_state, mem_ctx, req10, user_sid, &r->out.ctr->ctr6);
r->out.result = werr;
W_ERROR_NOT_OK_RETURN(werr);
break;
case DRSUAPI_EXOP_FSMO_REQ_ROLE:
werr = getncchanges_change_master(b_state, mem_ctx, req10, &r->out.ctr->ctr6);
W_ERROR_NOT_OK_RETURN(werr);
break;
case DRSUAPI_EXOP_FSMO_RID_REQ_ROLE:
werr = getncchanges_change_master(b_state, mem_ctx, req10, &r->out.ctr->ctr6);
W_ERROR_NOT_OK_RETURN(werr);
break;
case DRSUAPI_EXOP_FSMO_REQ_PDC:
werr = getncchanges_change_master(b_state, mem_ctx, req10, &r->out.ctr->ctr6);
W_ERROR_NOT_OK_RETURN(werr);
break;
case DRSUAPI_EXOP_REPL_OBJ:
werr = getncchanges_repl_obj(b_state, mem_ctx, req10, user_sid, &r->out.ctr->ctr6);
r->out.result = werr;
W_ERROR_NOT_OK_RETURN(werr);
break;
case DRSUAPI_EXOP_FSMO_ABANDON_ROLE:
DEBUG(0,(__location__ ": Request for DsGetNCChanges unsupported extended op 0x%x\n",
(unsigned)req10->extended_op));
return WERR_DS_DRA_NOT_SUPPORTED;
}
}
if (!ldb_dn_validate(getnc_state->ncRoot_dn) ||
ldb_dn_is_null(getnc_state->ncRoot_dn)) {
DEBUG(0,(__location__ ": Bad DN '%s'\n",
drs_ObjectIdentifier_to_string(mem_ctx, ncRoot)));
return WERR_DS_DRA_INVALID_PARAMETER;
}
/* we need the session key for encrypting password attributes */
status = dcesrv_inherited_session_key(dce_call->conn, &session_key);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,(__location__ ": Failed to get session key\n"));
return WERR_DS_DRA_INTERNAL_ERROR;
}
/*
TODO: MS-DRSR section 4.1.10.1.1
Work out if this is the start of a new cycle */
if (getnc_state->guids == NULL) {
char* search_filter;
enum ldb_scope scope = LDB_SCOPE_SUBTREE;
const char *extra_filter;
struct ldb_result *search_res;
if (req10->extended_op == DRSUAPI_EXOP_REPL_OBJ ||
req10->extended_op == DRSUAPI_EXOP_REPL_SECRET) {
scope = LDB_SCOPE_BASE;
}
extra_filter = lpcfg_parm_string(dce_call->conn->dce_ctx->lp_ctx, NULL, "drs", "object filter");
getnc_state->min_usn = req10->highwatermark.highest_usn;
/* Construct response. */
search_filter = talloc_asprintf(mem_ctx,
"(uSNChanged>=%llu)",
(unsigned long long)(getnc_state->min_usn+1));
if (extra_filter) {
search_filter = talloc_asprintf(mem_ctx, "(&%s(%s))", search_filter, extra_filter);
}
if (req10->replica_flags & DRSUAPI_DRS_CRITICAL_ONLY) {
search_filter = talloc_asprintf(mem_ctx,
"(&%s(isCriticalSystemObject=TRUE))",
search_filter);
}
if (req10->replica_flags & DRSUAPI_DRS_ASYNC_REP) {
scope = LDB_SCOPE_BASE;
}
if (!search_dn) {
search_dn = getnc_state->ncRoot_dn;
}
DEBUG(2,(__location__ ": getncchanges on %s using filter %s\n",
ldb_dn_get_linearized(getnc_state->ncRoot_dn), search_filter));
ret = drsuapi_search_with_extended_dn(sam_ctx, getnc_state, &search_res,
search_dn, scope, attrs,
search_filter);
if (ret != LDB_SUCCESS) {
return WERR_DS_DRA_INTERNAL_ERROR;
}
if (req10->replica_flags & DRSUAPI_DRS_GET_ANC) {
TYPESAFE_QSORT(search_res->msgs,
search_res->count,
site_res_cmp_parent_order);
} else {
TYPESAFE_QSORT(search_res->msgs,
search_res->count,
site_res_cmp_usn_order);
}
/* extract out the GUIDs list */
getnc_state->num_records = search_res->count;
getnc_state->guids = talloc_array(getnc_state, struct GUID, getnc_state->num_records);
W_ERROR_HAVE_NO_MEMORY(getnc_state->guids);
for (i=0; inum_records; i++) {
getnc_state->guids[i] = samdb_result_guid(search_res->msgs[i], "objectGUID");
if (GUID_all_zero(&getnc_state->guids[i])) {
DEBUG(2,("getncchanges: bad objectGUID from %s\n", ldb_dn_get_linearized(search_res->msgs[i]->dn)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
}
talloc_free(search_res);
getnc_state->uptodateness_vector = talloc_steal(getnc_state, req10->uptodateness_vector);
if (getnc_state->uptodateness_vector) {
/* make sure its sorted */
TYPESAFE_QSORT(getnc_state->uptodateness_vector->cursors,
getnc_state->uptodateness_vector->count,
drsuapi_DsReplicaCursor_compare);
}
}
/* Prefix mapping */
schema = dsdb_get_schema(sam_ctx, mem_ctx);
if (!schema) {
DEBUG(0,("No schema in sam_ctx\n"));
return WERR_DS_DRA_INTERNAL_ERROR;
}
r->out.ctr->ctr6.naming_context = talloc(mem_ctx, struct drsuapi_DsReplicaObjectIdentifier);
*r->out.ctr->ctr6.naming_context = *ncRoot;
if (dsdb_find_guid_by_dn(sam_ctx, getnc_state->ncRoot_dn,
&r->out.ctr->ctr6.naming_context->guid) != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to find GUID of ncRoot_dn %s\n",
ldb_dn_get_linearized(getnc_state->ncRoot_dn)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
/* find the SID if there is one */
dsdb_find_sid_by_dn(sam_ctx, getnc_state->ncRoot_dn, &r->out.ctr->ctr6.naming_context->sid);
dsdb_get_oid_mappings_drsuapi(schema, true, mem_ctx, &ctr);
r->out.ctr->ctr6.mapping_ctr = *ctr;
r->out.ctr->ctr6.source_dsa_guid = *(samdb_ntds_objectGUID(sam_ctx));
r->out.ctr->ctr6.source_dsa_invocation_id = *(samdb_ntds_invocation_id(sam_ctx));
r->out.ctr->ctr6.old_highwatermark = req10->highwatermark;
r->out.ctr->ctr6.new_highwatermark = req10->highwatermark;
r->out.ctr->ctr6.first_object = NULL;
currentObject = &r->out.ctr->ctr6.first_object;
/* use this to force single objects at a time, which is useful
* for working out what object is giving problems
*/
max_objects = lpcfg_parm_int(dce_call->conn->dce_ctx->lp_ctx, NULL, "drs", "max object sync", 1000);
if (req10->max_object_count < max_objects) {
max_objects = req10->max_object_count;
}
/*
* TODO: work out how the maximum should be calculated
*/
max_links = lpcfg_parm_int(dce_call->conn->dce_ctx->lp_ctx, NULL, "drs", "max link sync", 1500);
for (i=getnc_state->num_processed;
inum_records &&
!null_scope &&
(r->out.ctr->ctr6.object_count < max_objects);
i++) {
int uSN;
struct drsuapi_DsReplicaObjectListItemEx *obj;
struct ldb_message *msg;
static const char * const msg_attrs[] = {
"*",
"nTSecurityDescriptor",
"parentGUID",
"replPropertyMetaData",
DSDB_SECRET_ATTRIBUTES,
NULL };
struct ldb_result *msg_res;
struct ldb_dn *msg_dn;
obj = talloc_zero(mem_ctx, struct drsuapi_DsReplicaObjectListItemEx);
W_ERROR_HAVE_NO_MEMORY(obj);
msg_dn = ldb_dn_new_fmt(obj, sam_ctx, "", GUID_string(obj, &getnc_state->guids[i]));
W_ERROR_HAVE_NO_MEMORY(msg_dn);
/* by re-searching here we avoid having a lot of full
* records in memory between calls to getncchanges
*/
ret = drsuapi_search_with_extended_dn(sam_ctx, obj, &msg_res,
msg_dn,
LDB_SCOPE_BASE, msg_attrs, NULL);
if (ret != LDB_SUCCESS) {
if (ret != LDB_ERR_NO_SUCH_OBJECT) {
DEBUG(1,("getncchanges: failed to fetch DN %s - %s\n",
ldb_dn_get_extended_linearized(obj, msg_dn, 1), ldb_errstring(sam_ctx)));
}
talloc_free(obj);
continue;
}
msg = msg_res->msgs[0];
werr = get_nc_changes_build_object(obj, msg,
sam_ctx, getnc_state->ncRoot_dn,
getnc_state->is_schema_nc,
schema, &session_key, getnc_state->min_usn,
req10->replica_flags,
req10->partial_attribute_set,
getnc_state->uptodateness_vector,
req10->extended_op);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
werr = get_nc_changes_add_links(sam_ctx, getnc_state,
getnc_state->ncRoot_dn,
schema, getnc_state->min_usn,
req10->replica_flags,
msg,
&getnc_state->la_list,
&getnc_state->la_count,
getnc_state->uptodateness_vector);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
uSN = ldb_msg_find_attr_as_int(msg, "uSNChanged", -1);
if (uSN > r->out.ctr->ctr6.new_highwatermark.tmp_highest_usn) {
r->out.ctr->ctr6.new_highwatermark.tmp_highest_usn = uSN;
}
if (uSN > getnc_state->highest_usn) {
getnc_state->highest_usn = uSN;
}
if (obj->meta_data_ctr == NULL) {
DEBUG(8,(__location__ ": getncchanges skipping send of object %s\n",
ldb_dn_get_linearized(msg->dn)));
/* no attributes to send */
talloc_free(obj);
continue;
}
r->out.ctr->ctr6.object_count++;
*currentObject = obj;
currentObject = &obj->next_object;
talloc_free(getnc_state->last_dn);
getnc_state->last_dn = ldb_dn_copy(getnc_state, msg->dn);
DEBUG(8,(__location__ ": replicating object %s\n", ldb_dn_get_linearized(msg->dn)));
talloc_free(msg_res);
talloc_free(msg_dn);
}
getnc_state->num_processed = i;
r->out.ctr->ctr6.nc_object_count = getnc_state->num_records;
/* the client can us to call UpdateRefs on its behalf to
re-establish monitoring of the NC */
if ((req10->replica_flags & (DRSUAPI_DRS_ADD_REF | DRSUAPI_DRS_REF_GCSPN)) &&
!GUID_all_zero(&req10->destination_dsa_guid)) {
struct drsuapi_DsReplicaUpdateRefsRequest1 ureq;
DEBUG(3,("UpdateRefs on getncchanges for %s\n",
GUID_string(mem_ctx, &req10->destination_dsa_guid)));
ureq.naming_context = ncRoot;
ureq.dest_dsa_dns_name = talloc_asprintf(mem_ctx, "%s._msdcs.%s",
GUID_string(mem_ctx, &req10->destination_dsa_guid),
lpcfg_dnsdomain(dce_call->conn->dce_ctx->lp_ctx));
if (!ureq.dest_dsa_dns_name) {
return WERR_NOMEM;
}
ureq.dest_dsa_guid = req10->destination_dsa_guid;
ureq.options = DRSUAPI_DRS_ADD_REF |
DRSUAPI_DRS_ASYNC_OP |
DRSUAPI_DRS_GETCHG_CHECK;
/* we also need to pass through the
DRSUAPI_DRS_REF_GCSPN bit so that repsTo gets flagged
to send notifies using the GC SPN */
ureq.options |= (req10->replica_flags & DRSUAPI_DRS_REF_GCSPN);
werr = drsuapi_UpdateRefs(b_state, mem_ctx, &ureq);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,(__location__ ": Failed UpdateRefs in DsGetNCChanges - %s\n",
win_errstr(werr)));
}
}
/*
* TODO:
* This is just a guess, how to calculate the
* number of linked attributes to send, we need to
* find out how to do this right.
*/
if (r->out.ctr->ctr6.object_count >= max_links) {
max_links = 0;
} else {
max_links -= r->out.ctr->ctr6.object_count;
}
link_total = getnc_state->la_count;
if (i < getnc_state->num_records) {
r->out.ctr->ctr6.more_data = true;
} else {
/* sort the whole array the first time */
if (!getnc_state->la_sorted) {
LDB_TYPESAFE_QSORT(getnc_state->la_list, getnc_state->la_count,
sam_ctx, linked_attribute_compare);
getnc_state->la_sorted = true;
}
link_count = getnc_state->la_count - getnc_state->la_idx;
link_count = MIN(max_links, link_count);
r->out.ctr->ctr6.linked_attributes_count = link_count;
r->out.ctr->ctr6.linked_attributes = getnc_state->la_list + getnc_state->la_idx;
getnc_state->la_idx += link_count;
link_given = getnc_state->la_idx;
if (getnc_state->la_idx < getnc_state->la_count) {
r->out.ctr->ctr6.more_data = true;
}
}
if (!r->out.ctr->ctr6.more_data) {
talloc_steal(mem_ctx, getnc_state->la_list);
r->out.ctr->ctr6.uptodateness_vector = talloc(mem_ctx, struct drsuapi_DsReplicaCursor2CtrEx);
r->out.ctr->ctr6.new_highwatermark.highest_usn = r->out.ctr->ctr6.new_highwatermark.tmp_highest_usn;
werr = get_nc_changes_udv(sam_ctx, getnc_state->ncRoot_dn,
r->out.ctr->ctr6.uptodateness_vector);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
talloc_free(getnc_state);
b_state->getncchanges_state = NULL;
}
if (req10->extended_op != DRSUAPI_EXOP_NONE) {
r->out.ctr->ctr6.uptodateness_vector = NULL;
r->out.ctr->ctr6.nc_object_count = 0;
ZERO_STRUCT(r->out.ctr->ctr6.new_highwatermark);
r->out.ctr->ctr6.extended_ret = DRSUAPI_EXOP_ERR_SUCCESS;
}
DEBUG(r->out.ctr->ctr6.more_data?4:2,
("DsGetNCChanges with uSNChanged >= %llu flags 0x%08x on %s gave %u objects (done %u/%u) %u links (done %u/%u (as %s))\n",
(unsigned long long)(req10->highwatermark.highest_usn+1),
req10->replica_flags, drs_ObjectIdentifier_to_string(mem_ctx, ncRoot),
r->out.ctr->ctr6.object_count,
i, r->out.ctr->ctr6.more_data?getnc_state->num_records:i,
r->out.ctr->ctr6.linked_attributes_count,
link_given, link_total,
dom_sid_string(mem_ctx, user_sid)));
#if 0
if (!r->out.ctr->ctr6.more_data && req10->extended_op != DRSUAPI_EXOP_NONE) {
NDR_PRINT_FUNCTION_DEBUG(drsuapi_DsGetNCChanges, NDR_BOTH, r);
}
#endif
return WERR_OK;
}