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4b52f102be
samba-mirror/source4/rpc_server/drsuapi/getncchanges.c
Garming Sam 4b52f102be getncchanges: Do not filter EXOPs using highwatermark 
Prior to this patch, any REPL_SECRETS could be filtered accidentally.

Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2017-05-30 08:06:07 +02:00

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/*
Unix SMB/CIFS implementation.
implement the DSGetNCChanges call
Copyright (C) Anatoliy Atanasov 2009
Copyright (C) Andrew Tridgell 2009-2010
Copyright (C) Andrew Bartlett 2010-2016
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 "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 "rpc_server/common/sid_helper.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"
#include "lib/dbwrap/dbwrap.h"
#include "lib/dbwrap/dbwrap_rbt.h"
#include "librpc/gen_ndr/ndr_misc.h"
/* state of a partially completed getncchanges call */
struct drsuapi_getncchanges_state {
struct db_context *anc_cache;
struct GUID *guids;
uint32_t num_records;
uint32_t num_processed;
struct ldb_dn *ncRoot_dn;
struct GUID ncRoot_guid;
bool is_schema_nc;
uint64_t min_usn;
uint64_t max_usn;
struct drsuapi_DsReplicaHighWaterMark last_hwm;
struct ldb_dn *last_dn;
struct drsuapi_DsReplicaHighWaterMark final_hwm;
struct drsuapi_DsReplicaCursor2CtrEx *final_udv;
struct drsuapi_DsReplicaLinkedAttribute *la_list;
uint32_t la_count;
struct la_for_sorting *la_sorted;
uint32_t la_idx;
};
/* We must keep the GUIDs in NDR form for sorting */
struct la_for_sorting {
struct drsuapi_DsReplicaLinkedAttribute *link;
uint8_t target_guid[16];
uint8_t source_guid[16];
};
static int drsuapi_DsReplicaHighWaterMark_cmp(const struct drsuapi_DsReplicaHighWaterMark *h1,
const struct drsuapi_DsReplicaHighWaterMark *h2)
{
if (h1->highest_usn < h2->highest_usn) {
return -1;
} else if (h1->highest_usn > h2->highest_usn) {
return 1;
} else if (h1->tmp_highest_usn < h2->tmp_highest_usn) {
return -1;
} else if (h1->tmp_highest_usn > h2->tmp_highest_usn) {
return 1;
} else if (h1->reserved_usn < h2->reserved_usn) {
return -1;
} else if (h1->reserved_usn > h2->reserved_usn) {
return 1;
}
return 0;
}
/*
build a DsReplicaObjectIdentifier from a ldb msg
*/
static struct drsuapi_DsReplicaObjectIdentifier *get_object_identifier(TALLOC_CTX *mem_ctx,
const 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 uint32_t_cmp(uint32_t a1, uint32_t a2)
{
if (a1 == a2) return 0;
return a1 > a2 ? 1 : -1;
}
static int uint32_t_ptr_cmp(uint32_t *a1, uint32_t *a2, void *unused)
{
if (*a1 == *a2) return 0;
return *a1 > *a2 ? 1 : -1;
}
static WERROR getncchanges_attid_remote_to_local(const struct dsdb_schema *schema,
const struct dsdb_syntax_ctx *ctx,
enum drsuapi_DsAttributeId remote_attid_as_enum,
enum drsuapi_DsAttributeId *local_attid_as_enum,
const struct dsdb_attribute **_sa)
{
WERROR werr;
const struct dsdb_attribute *sa = NULL;
if (ctx->pfm_remote == NULL) {
DEBUG(7, ("No prefixMap supplied, falling back to local prefixMap.\n"));
goto fail;
}
werr = dsdb_attribute_drsuapi_remote_to_local(ctx,
remote_attid_as_enum,
local_attid_as_enum,
_sa);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(3, ("WARNING: Unable to resolve remote attid, falling back to local prefixMap.\n"));
goto fail;
}
return werr;
fail:
sa = dsdb_attribute_by_attributeID_id(schema, remote_attid_as_enum);
if (sa == NULL) {
return WERR_DS_DRA_SCHEMA_MISMATCH;
} else {
if (local_attid_as_enum != NULL) {
*local_attid_as_enum = sa->attributeID_id;
}
if (_sa != NULL) {
*_sa = sa;
}
return WERR_OK;
}
}
/*
* Similar to function in repl_meta_data without the extra
* dependencies.
*/
static WERROR get_parsed_dns_trusted(TALLOC_CTX *mem_ctx, struct ldb_message_element *el,
struct parsed_dn **pdn)
{
/* Here we get a list of 'struct parsed_dns' without the parsing */
int i;
*pdn = talloc_zero_array(mem_ctx, struct parsed_dn,
el->num_values);
if (!*pdn) {
return WERR_DS_DRA_INTERNAL_ERROR;
}
for (i = 0; i < el->num_values; i++) {
(*pdn)[i].v = &el->values[i];
}
return WERR_OK;
}
static WERROR getncchanges_update_revealed_list(struct ldb_context *sam_ctx,
TALLOC_CTX *mem_ctx,
struct ldb_message **msg,
struct ldb_dn *object_dn,
const struct GUID *object_guid,
const struct dsdb_attribute *sa,
struct replPropertyMetaData1 *meta_data,
struct ldb_message *revealed_users)
{
enum ndr_err_code ndr_err;
int ldb_err;
char *attr_str = NULL;
char *attr_hex = NULL;
DATA_BLOB attr_blob;
struct ldb_message_element *existing = NULL, *el_add = NULL, *el_del = NULL;
const char * const * secret_attributes = ldb_get_opaque(sam_ctx, "LDB_SECRET_ATTRIBUTE_LIST");
if (!ldb_attr_in_list(secret_attributes,
sa->lDAPDisplayName)) {
return WERR_OK;
}
ndr_err = ndr_push_struct_blob(&attr_blob, mem_ctx, meta_data, (ndr_push_flags_fn_t)ndr_push_replPropertyMetaData1);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
return WERR_DS_DRA_INTERNAL_ERROR;
}
attr_hex = hex_encode_talloc(mem_ctx, attr_blob.data, attr_blob.length);
if (attr_hex == NULL) {
return WERR_NOT_ENOUGH_MEMORY;
}
attr_str = talloc_asprintf(mem_ctx, "B:%zd:%s:%s", attr_blob.length*2, attr_hex, ldb_dn_get_linearized(object_dn));
if (attr_str == NULL) {
return WERR_NOT_ENOUGH_MEMORY;
}
existing = ldb_msg_find_element(revealed_users, "msDS-RevealedUsers");
if (existing != NULL) {
/* Replace the old value (if one exists) with the current one */
struct parsed_dn *link_dns;
struct parsed_dn *exact = NULL, *unused = NULL;
WERROR werr;
uint8_t attid[4];
DATA_BLOB partial_meta;
werr = get_parsed_dns_trusted(mem_ctx, existing, &link_dns);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
/* Construct a partial metadata blob to match on in the DB */
SIVAL(attid, 0, sa->attributeID_id);
partial_meta.length = 4;
partial_meta.data = attid;
/* Binary search using GUID and attribute id for uniqueness */
ldb_err = parsed_dn_find(sam_ctx, link_dns, existing->num_values,
object_guid, object_dn,
partial_meta, 4,
&exact, &unused,
DSDB_SYNTAX_BINARY_DN, true);
if (ldb_err != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed parsed DN find - %s\n",
ldb_errstring(sam_ctx)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
if (exact != NULL) {
/* Perform some verification of the blob */
struct replPropertyMetaData1 existing_meta_data;
ndr_err = ndr_pull_struct_blob_all_noalloc(&exact->dsdb_dn->extra_part,
&existing_meta_data,
(ndr_pull_flags_fn_t)ndr_pull_replPropertyMetaData1);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
return WERR_DS_DRA_INTERNAL_ERROR;
}
if (existing_meta_data.attid == sa->attributeID_id) {
ldb_err = ldb_msg_add_empty(*msg, "msDS-RevealedUsers", LDB_FLAG_MOD_DELETE, &el_del);
if (ldb_err != LDB_SUCCESS) {
return WERR_DS_DRA_INTERNAL_ERROR;
}
el_del->values = talloc_array((*msg)->elements, struct ldb_val, 1);
if (el_del->values == NULL) {
return WERR_NOT_ENOUGH_MEMORY;
}
el_del->values[0] = *exact->v;
el_del->num_values = 1;
} else {
return WERR_DS_DRA_INTERNAL_ERROR;
}
}
}
ldb_err = ldb_msg_add_empty(*msg, "msDS-RevealedUsers", LDB_FLAG_MOD_ADD, &el_add);
if (ldb_err != LDB_SUCCESS) {
return WERR_DS_DRA_INTERNAL_ERROR;
}
el_add->values = talloc_array((*msg)->elements, struct ldb_val, 1);
if (el_add->values == NULL) {
return WERR_NOT_ENOUGH_MEMORY;
}
el_add->values[0] = data_blob_string_const(attr_str);
el_add->num_values = 1;
return WERR_OK;
}
/*
* This function filter attributes for build_object based on the
* uptodatenessvector and partial attribute set.
*
* Any secret attributes are forced here for REPL_SECRET, and audited at this
* point with msDS-RevealedUsers.
*/
static WERROR get_nc_changes_filter_attrs(struct drsuapi_DsReplicaObjectListItemEx *obj,
struct replPropertyMetaDataBlob md,
struct ldb_context *sam_ctx,
const struct ldb_message *msg,
const struct GUID *guid,
uint32_t *count,
uint64_t highest_usn,
const struct dsdb_attribute *rdn_sa,
struct dsdb_schema *schema,
struct drsuapi_DsReplicaCursorCtrEx *uptodateness_vector,
struct drsuapi_DsPartialAttributeSet *partial_attribute_set,
uint32_t *local_pas,
uint32_t *attids,
bool exop_secret,
struct ldb_message **revealed_list_msg,
struct ldb_message *existing_revealed_list_msg)
{
uint32_t i, n;
WERROR werr;
for (n=i=0; i<md.ctr.ctr1.count; i++) {
const struct dsdb_attribute *sa;
bool force_attribute = false;
/* if the attribute has not changed, and it is not the
instanceType then don't include it */
if (md.ctr.ctr1.array[i].local_usn < highest_usn &&
!exop_secret &&
md.ctr.ctr1.array[i].attid != DRSUAPI_ATTID_instanceType) continue;
/* don't include the rDN */
if (md.ctr.ctr1.array[i].attid == rdn_sa->attributeID_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 (exop_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)));
werr = getncchanges_update_revealed_list(sam_ctx, obj,
revealed_list_msg,
msg->dn, guid, sa,
&md.ctr.ctr1.array[i],
existing_revealed_list_msg);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
}
/* 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 && !force_attribute) {
uint32_t *result = NULL;
BINARY_ARRAY_SEARCH_V(local_pas, partial_attribute_set->num_attids, sa->attributeID_id,
uint32_t_cmp, result);
if (result == NULL) {
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++;
}
*count = n;
return WERR_OK;
}
/*
drsuapi_DsGetNCChanges for one object
*/
static WERROR get_nc_changes_build_object(struct drsuapi_DsReplicaObjectListItemEx *obj,
const 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,
bool force_object_return,
uint32_t *local_pas,
struct ldb_dn *machine_dn,
const struct GUID *guid)
{
const struct ldb_val *md_value;
uint32_t i, n;
struct replPropertyMetaDataBlob md;
uint32_t rid = 0;
int ldb_err;
enum ndr_err_code ndr_err;
uint32_t *attids;
const char *rdn;
const struct dsdb_attribute *rdn_sa;
uint64_t uSNChanged;
unsigned int instanceType;
struct dsdb_syntax_ctx syntax_ctx;
struct ldb_result *res = NULL;
WERROR werr;
int ret;
/* make dsdb sytanx context for conversions */
dsdb_syntax_ctx_init(&syntax_ctx, sam_ctx, schema);
syntax_ctx.is_schema_nc = is_schema_nc;
uSNChanged = ldb_msg_find_attr_as_uint64(msg, "uSNChanged", 0);
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;
}
if (uSNChanged <= highest_usn) {
/* nothing to send */
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_NOT_ENOUGH_MEMORY;
}
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);
if (extended_op == DRSUAPI_EXOP_REPL_SECRET) {
/* Get the existing revealed users for the destination */
struct ldb_message *revealed_list_msg = NULL;
struct ldb_message *existing_revealed_list_msg = NULL;
const char *machine_attrs[] = {
"msDS-RevealedUsers",
NULL
};
revealed_list_msg = ldb_msg_new(sam_ctx);
if (revealed_list_msg == NULL) {
return WERR_NOT_ENOUGH_MEMORY;
}
revealed_list_msg->dn = machine_dn;
ret = ldb_transaction_start(sam_ctx);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed transaction start - %s\n",
ldb_errstring(sam_ctx)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
ldb_err = dsdb_search_dn(sam_ctx, obj, &res, machine_dn, machine_attrs, DSDB_SEARCH_SHOW_EXTENDED_DN);
if (ldb_err != LDB_SUCCESS || res->count != 1) {
ldb_transaction_cancel(sam_ctx);
return WERR_DS_DRA_INTERNAL_ERROR;
}
existing_revealed_list_msg = res->msgs[0];
werr = get_nc_changes_filter_attrs(obj, md, sam_ctx, msg,
guid, &n, highest_usn,
rdn_sa, schema,
uptodateness_vector,
partial_attribute_set, local_pas,
attids,
true,
&revealed_list_msg,
existing_revealed_list_msg);
if (!W_ERROR_IS_OK(werr)) {
ldb_transaction_cancel(sam_ctx);
return werr;
}
if (revealed_list_msg != NULL) {
ret = ldb_modify(sam_ctx, revealed_list_msg);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to alter revealed links - %s\n",
ldb_errstring(sam_ctx)));
ldb_transaction_cancel(sam_ctx);
return WERR_DS_DRA_INTERNAL_ERROR;
}
}
ret = ldb_transaction_commit(sam_ctx);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed transaction commit - %s\n",
ldb_errstring(sam_ctx)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
} else {
werr = get_nc_changes_filter_attrs(obj, md, sam_ctx, msg, guid,
&n, highest_usn, rdn_sa,
schema, uptodateness_vector,
partial_attribute_set, local_pas,
attids,
false,
NULL,
NULL);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
}
/* ignore it if its an empty change. Note that renames always
* change the 'name' attribute, so they won't be ignored by
* this
* the force_object_return check is used to force an empty
* object return when we timeout in the getncchanges loop.
* This allows us to return an empty object, which keeps the
* client happy while preventing timeouts
*/
if (n == 0 ||
(n == 1 &&
attids[0] == DRSUAPI_ATTID_instanceType &&
!force_object_return)) {
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);
if (obj->object.attribute_ctr.attributes == NULL) {
return WERR_NOT_ENOUGH_MEMORY;
}
/*
* Note that the meta_data array and the attributes array must
* be the same size and in the same order
*/
for (i=0; i<obj->object.attribute_ctr.num_attributes; i++) {
struct ldb_message_element *el;
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 on %s to DRS object - %s\n",
sa->lDAPDisplayName, ldb_dn_get_linearized(msg->dn),
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 on %s in DRS object - %s\n",
sa->lDAPDisplayName, ldb_dn_get_linearized(msg->dn),
win_errstr(werr)));
return werr;
}
}
if (attids[i] != obj->object.attribute_ctr.attributes[i].attid) {
DEBUG(0, ("Unable to replicate attribute %s on %s via DRS, incorrect attributeID: "
"0x%08x vs 0x%08x "
"Run dbcheck!\n",
sa->lDAPDisplayName,
ldb_dn_get_linearized(msg->dn),
attids[i],
obj->object.attribute_ctr.attributes[i].attid));
return WERR_DS_DATABASE_ERROR;
}
}
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,
const struct ldb_message *msg,
struct dsdb_dn *dsdb_dn,
struct drsuapi_DsReplicaLinkedAttribute **la_list,
uint32_t *la_count,
bool is_schema_nc)
{
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;
if (!active) {
/* We have to check that the inactive link still point to an existing object */
struct GUID guid;
struct ldb_dn *tdn;
int ret;
const char *v;
v = ldb_msg_find_attr_as_string(msg, "isDeleted", "FALSE");
if (strncmp(v, "TRUE", 4) == 0) {
/*
* Note: we skip the transmition of the deleted link even if the other part used to
* know about it because when we transmit the deletion of the object, the link will
* be deleted too due to deletion of object where link points and Windows do so.
*/
if (dsdb_functional_level(sam_ctx) >= DS_DOMAIN_FUNCTION_2008_R2) {
v = ldb_msg_find_attr_as_string(msg, "isRecycled", "FALSE");
/*
* On Windows 2008R2 isRecycled is always present even if FL or DL are < FL 2K8R2
* if it join an existing domain with deleted objets, it firsts impose to have a
* schema with the is-Recycled object and for all deleted objects it adds the isRecycled
* either during initial replication or after the getNCChanges.
* Behavior of samba has been changed to always have this attribute if it's present in the schema.
*
* So if FL <2K8R2 isRecycled might be here or not but we don't care, it's meaning less.
* If FL >=2K8R2 we are sure that this attribute will be here.
* For this kind of forest level we do not return the link if the object is recycled
* (isRecycled = true).
*/
if (strncmp(v, "TRUE", 4) == 0) {
DEBUG(2, (" object %s is recycled, not returning linked attribute !\n",
ldb_dn_get_linearized(msg->dn)));
return WERR_OK;
}
} else {
return WERR_OK;
}
}
status = dsdb_get_extended_dn_guid(dsdb_dn->dn, &guid, "GUID");
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,(__location__ " Unable to extract GUID in linked attribute '%s' in '%s'\n",
sa->lDAPDisplayName, ldb_dn_get_linearized(msg->dn)));
return ntstatus_to_werror(status);
}
ret = dsdb_find_dn_by_guid(sam_ctx, mem_ctx, &guid, 0, &tdn);
if (ret == LDB_ERR_NO_SUCH_OBJECT) {
DEBUG(2, (" Search of guid %s returned 0 objects, skipping it !\n",
GUID_string(mem_ctx, &guid)));
return WERR_OK;
} else if (ret != LDB_SUCCESS) {
DEBUG(0, (__location__ " Search of guid %s failed with error code %d\n",
GUID_string(mem_ctx, &guid),
ret));
return WERR_OK;
}
}
la->attid = dsdb_attribute_get_attid(sa, is_schema_nc);
la->flags = active?DRSUAPI_DS_LINKED_ATTRIBUTE_FLAG_ACTIVE:0;
status = dsdb_get_extended_dn_uint32(dsdb_dn->dn, &la->meta_data.version, "RMD_VERSION");
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,(__location__ " No RMD_VERSION in linked attribute '%s' in '%s'\n",
sa->lDAPDisplayName, ldb_dn_get_linearized(msg->dn)));
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)) {
DEBUG(0,(__location__ " No RMD_CHANGETIME in linked attribute '%s' in '%s'\n",
sa->lDAPDisplayName, ldb_dn_get_linearized(msg->dn)));
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)) {
DEBUG(0,(__location__ " No RMD_INVOCID in linked attribute '%s' in '%s'\n",
sa->lDAPDisplayName, ldb_dn_get_linearized(msg->dn)));
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)) {
DEBUG(0,(__location__ " No RMD_ORIGINATING_USN in linked attribute '%s' in '%s'\n",
sa->lDAPDisplayName, ldb_dn_get_linearized(msg->dn)));
return ntstatus_to_werror(status);
}
status = dsdb_get_extended_dn_nttime(dsdb_dn->dn, &la->originating_add_time, "RMD_ADDTIME");
if (!NT_STATUS_IS_OK(status)) {
/* this is possible for upgraded links */
la->originating_add_time = la->meta_data.originating_change_time;
}
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,
bool is_schema_nc,
struct dsdb_schema *schema,
uint64_t highest_usn,
uint32_t replica_flags,
const 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 = NULL;
uint64_t uSNChanged = ldb_msg_find_attr_as_uint64(msg, "uSNChanged", 0);
bool is_critical = ldb_msg_find_attr_as_bool(msg, "isCriticalSystemObject", false);
if (replica_flags & DRSUAPI_DRS_CRITICAL_ONLY) {
if (!is_critical) {
return WERR_OK;
}
}
if (uSNChanged <= highest_usn) {
return WERR_OK;
}
tmp_ctx = talloc_new(mem_ctx);
if (tmp_ctx == NULL) {
return WERR_NOT_ENOUGH_MEMORY;
}
for (i=0; i<msg->num_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; j<el->num_values; j++) {
struct dsdb_dn *dsdb_dn;
uint64_t local_usn;
uint64_t originating_usn;
NTSTATUS status, status2;
WERROR werr;
struct GUID originating_invocation_id;
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;
}
status = dsdb_get_extended_dn_guid(dsdb_dn->dn,
&originating_invocation_id,
"RMD_INVOCID");
status2 = dsdb_get_extended_dn_uint64(dsdb_dn->dn,
&originating_usn,
"RMD_ORIGINATING_USN");
if (NT_STATUS_IS_OK(status) && NT_STATUS_IS_OK(status2)) {
if (udv_filter(uptodateness_vector,
&originating_invocation_id,
originating_usn)) {
continue;
}
}
werr = get_nc_changes_add_la(mem_ctx, sam_ctx, schema,
sa, msg, dsdb_dn, la_list,
la_count, is_schema_nc);
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 la_for_sorting *la1,
const struct la_for_sorting *la2,
void *opaque)
{
int c;
c = memcmp(la1->source_guid,
la2->source_guid, sizeof(la2->source_guid));
if (c != 0) {
return c;
}
if (la1->link->attid != la2->link->attid) {
return la1->link->attid < la2->link->attid? -1:1;
}
if ((la1->link->flags & DRSUAPI_DS_LINKED_ATTRIBUTE_FLAG_ACTIVE) !=
(la2->link->flags & DRSUAPI_DS_LINKED_ATTRIBUTE_FLAG_ACTIVE)) {
return (la1->link->flags &
DRSUAPI_DS_LINKED_ATTRIBUTE_FLAG_ACTIVE)? 1:-1;
}
return memcmp(la1->target_guid,
la2->target_guid, sizeof(la2->target_guid));
}
struct drsuapi_changed_objects {
struct ldb_dn *dn;
struct GUID guid;
uint64_t usn;
};
/*
sort the objects we send first by uSNChanged
*/
static int site_res_cmp_usn_order(struct drsuapi_changed_objects *m1,
struct drsuapi_changed_objects *m2,
struct drsuapi_getncchanges_state *getnc_state)
{
int ret;
ret = ldb_dn_compare(getnc_state->ncRoot_dn, m1->dn);
if (ret == 0) {
return -1;
}
ret = ldb_dn_compare(getnc_state->ncRoot_dn, m2->dn);
if (ret == 0) {
return 1;
}
if (m1->usn == m2->usn) {
return ldb_dn_compare(m2->dn, m1->dn);
}
if (m1->usn < m2->usn) {
return -1;
}
return 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)
{
struct ldb_dn *req_dn, *ntds_dn = NULL;
int ret;
struct ldb_context *ldb = b_state->sam_ctx;
struct ldb_result *ext_res;
struct dsdb_fsmo_extended_op *exop;
bool is_us;
/*
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, also return to caller */
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 (!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;
}
/* TODO: make sure ntds_dn is a valid nTDSDSA object */
ret = dsdb_find_dn_by_guid(ldb, mem_ctx, &req10->destination_dsa_guid, 0, &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)));
ctr6->extended_ret = DRSUAPI_EXOP_ERR_UNKNOWN_CALLER;
return WERR_OK;
}
/* find the DN of the RID Manager */
ret = samdb_reference_dn_is_our_ntdsa(ldb, *rid_manager_dn, "fSMORoleOwner", &is_us);
if (ret != LDB_SUCCESS) {
DEBUG(0,("Failed to find fSMORoleOwner in RID Manager object\n"));
ctr6->extended_ret = DRSUAPI_EXOP_ERR_FSMO_NOT_OWNER;
return WERR_DS_DRA_INTERNAL_ERROR;
}
if (!is_us) {
/* 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;
}
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);
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;
}
/*
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,
bool has_get_all_changes,
struct ldb_dn **machine_dn)
{
struct drsuapi_DsReplicaObjectIdentifier *ncRoot = req10->naming_context;
struct ldb_dn *obj_dn = NULL;
struct ldb_dn *ntds_dn = NULL, *server_dn = NULL;
struct ldb_dn *rodc_dn, *krbtgt_link_dn;
int ret;
const char *rodc_attrs[] = { "msDS-KrbTgtLink", "msDS-NeverRevealGroup", "msDS-RevealOnDemandGroup", "objectGUID", NULL };
const char *obj_attrs[] = { "tokenGroups", "objectSid", "UserAccountControl", "msDS-KrbTgtLinkBL", NULL };
struct ldb_result *rodc_res = NULL, *obj_res = NULL;
const struct dom_sid **never_reveal_sids, **reveal_sids, **token_sids;
const struct dom_sid *object_sid = NULL;
WERROR werr;
const struct dom_sid *additional_sids[] = { NULL, NULL };
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 DC 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;
}
/*
* Before we accept or deny, fetch the machine DN for the destination
* DSA GUID.
*
* If we are the RODC, we will check that this matches the SID.
*/
ret = dsdb_find_dn_by_guid(b_state->sam_ctx_system, mem_ctx,
&req10->destination_dsa_guid, 0,
&ntds_dn);
if (ret != LDB_SUCCESS) {
goto failed;
}
server_dn = ldb_dn_get_parent(mem_ctx, ntds_dn);
if (server_dn == NULL) {
goto failed;
}
ret = samdb_reference_dn(b_state->sam_ctx_system, mem_ctx, server_dn,
"serverReference", machine_dn);
if (ret != LDB_SUCCESS) {
goto failed;
}
/*
* In MS-DRSR.pdf 5.99 IsGetNCChangesPermissionGranted
*
* The pseudo code indicate
* revealsecrets = true
* if IsRevealSecretRequest(msgIn) then
* if AccessCheckCAR(ncRoot, Ds-Replication-Get-Changes-All) = false
* then
* if (msgIn.ulExtendedOp = EXOP_REPL_SECRETS) then
* <... check if this account is ok to be replicated on this DC ...>
* <... and if not reveal secrets = no ...>
* else
* reveal secrets = false
* endif
* endif
* endif
*
* Which basically means that if you have GET_ALL_CHANGES rights (~== RWDC)
* then you can do EXOP_REPL_SECRETS
*/
obj_dn = drs_ObjectIdentifier_to_dn(mem_ctx, b_state->sam_ctx_system, ncRoot);
if (!ldb_dn_validate(obj_dn)) goto failed;
if (has_get_all_changes) {
goto allowed;
}
rodc_dn = ldb_dn_new_fmt(mem_ctx, b_state->sam_ctx_system, "<SID=%s>",
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 */
object_sid = samdb_result_dom_sid(mem_ctx, obj_res->msgs[0], "objectSid");
if (dom_sid_equal(user_sid, object_sid)) {
goto allowed;
}
additional_sids[0] = object_sid;
/*
* Must be an RODC account at this point, verify machine DN matches the
* SID account
*/
if (ldb_dn_compare(rodc_res->msgs[0]->dn, *machine_dn) != 0) {
goto denied;
}
/* 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;
}
/*
* The SID list needs to include itself as well as the tokenGroups.
*
* TODO determine if sIDHistory is required for this check
*/
werr = samdb_result_sid_array_ndr(b_state->sam_ctx_system, obj_res->msgs[0],
mem_ctx, "tokenGroups", &token_sids,
additional_sids, 1);
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 single object with 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_SECRETS_DENIED;
allowed:
DEBUG(2,(__location__ ": Allowed single object with secret replication for %s by %s %s\n",
ldb_dn_get_linearized(obj_dn), has_get_all_changes?"RWDC":"RODC",
ldb_dn_get_linearized(*machine_dn)));
ctr6->extended_ret = DRSUAPI_EXOP_ERR_SUCCESS;
req10->highwatermark.highest_usn = 0;
return WERR_OK;
failed:
DEBUG(2,(__location__ ": Failed single 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;
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 *req_dn, *ntds_dn;
int ret;
unsigned int i;
struct ldb_context *ldb = b_state->sam_ctx;
struct ldb_message *msg;
bool is_us;
/*
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 (!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;
}
/* find the DN of the current role owner */
ret = samdb_reference_dn_is_our_ntdsa(ldb, req_dn, "fSMORoleOwner", &is_us);
if (ret != LDB_SUCCESS) {
DEBUG(0,("Failed to find fSMORoleOwner in RID Manager object\n"));
ctr6->extended_ret = DRSUAPI_EXOP_ERR_FSMO_NOT_OWNER;
return WERR_DS_DRA_INTERNAL_ERROR;
}
if (!is_us) {
/* we're not the RID Manager or role owner - go away */
DEBUG(0,(__location__ ": FSMO role or RID manager transfer owner request when not role 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);
/* TODO: make sure ntds_dn is a valid nTDSDSA object */
ret = dsdb_find_dn_by_guid(ldb, msg, &req10->destination_dsa_guid, 0, &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);
ctr6->extended_ret = DRSUAPI_EXOP_ERR_UNKNOWN_CALLER;
return WERR_OK;
}
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;i<msg->num_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;
}
/*
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,
struct dsdb_schema_prefixmap *pfm_remote,
bool *is_secret_request)
{
enum drsuapi_DsExtendedOperation exop;
uint32_t i;
struct dsdb_schema *schema;
struct dsdb_syntax_ctx syntax_ctx;
*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);
dsdb_syntax_ctx_init(&syntax_ctx, b_state->sam_ctx, schema);
syntax_ctx.pfm_remote = pfm_remote;
/* check the attributes they asked for */
for (i=0; i<req10->partial_attribute_set->num_attids; i++) {
const struct dsdb_attribute *sa;
WERROR werr = getncchanges_attid_remote_to_local(schema,
&syntax_ctx,
req10->partial_attribute_set->attids[i],
NULL,
&sa);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,(__location__": attid 0x%08X not found: %s\n",
req10->partial_attribute_set->attids[i], win_errstr(werr)));
return werr;
}
if (!dsdb_attr_in_rodc_fas(sa)) {
*is_secret_request = true;
return WERR_OK;
}
}
if (req10->partial_attribute_set_ex) {
/* check the extended attributes they asked for */
for (i=0; i<req10->partial_attribute_set_ex->num_attids; i++) {
const struct dsdb_attribute *sa;
WERROR werr = getncchanges_attid_remote_to_local(schema,
&syntax_ctx,
req10->partial_attribute_set_ex->attids[i],
NULL,
&sa);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,(__location__": attid 0x%08X not found: %s\n",
req10->partial_attribute_set_ex->attids[i], win_errstr(werr)));
return werr;
}
if (!dsdb_attr_in_rodc_fas(sa)) {
*is_secret_request = true;
return WERR_OK;
}
}
}
*is_secret_request = false;
return WERR_OK;
}
/*
see if this getncchanges request is only for attributes in the GC
partial attribute set
*/
static WERROR dcesrv_drsuapi_is_gc_pas_request(struct drsuapi_bind_state *b_state,
struct drsuapi_DsGetNCChangesRequest10 *req10,
struct dsdb_schema_prefixmap *pfm_remote,
bool *is_gc_pas_request)
{
enum drsuapi_DsExtendedOperation exop;
uint32_t i;
struct dsdb_schema *schema;
struct dsdb_syntax_ctx syntax_ctx;
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:
case DRSUAPI_EXOP_REPL_SECRET:
*is_gc_pas_request = false;
return WERR_OK;
case DRSUAPI_EXOP_REPL_OBJ:
case DRSUAPI_EXOP_NONE:
break;
}
if (req10->partial_attribute_set == NULL) {
/* they want it all */
*is_gc_pas_request = false;
return WERR_OK;
}
schema = dsdb_get_schema(b_state->sam_ctx, NULL);
dsdb_syntax_ctx_init(&syntax_ctx, b_state->sam_ctx, schema);
syntax_ctx.pfm_remote = pfm_remote;
/* check the attributes they asked for */
for (i=0; i<req10->partial_attribute_set->num_attids; i++) {
const struct dsdb_attribute *sa;
WERROR werr = getncchanges_attid_remote_to_local(schema,
&syntax_ctx,
req10->partial_attribute_set->attids[i],
NULL,
&sa);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,(__location__": attid 0x%08X not found: %s\n",
req10->partial_attribute_set->attids[i], win_errstr(werr)));
return werr;
}
if (!sa->isMemberOfPartialAttributeSet) {
*is_gc_pas_request = false;
return WERR_OK;
}
}
if (req10->partial_attribute_set_ex) {
/* check the extended attributes they asked for */
for (i=0; i<req10->partial_attribute_set_ex->num_attids; i++) {
const struct dsdb_attribute *sa;
WERROR werr = getncchanges_attid_remote_to_local(schema,
&syntax_ctx,
req10->partial_attribute_set_ex->attids[i],
NULL,
&sa);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,(__location__": attid 0x%08X not found: %s\n",
req10->partial_attribute_set_ex->attids[i], win_errstr(werr)));
return werr;
}
if (!sa->isMemberOfPartialAttributeSet) {
*is_gc_pas_request = false;
return WERR_OK;
}
}
}
*is_gc_pas_request = true;
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;
}
static const char *collect_objects_attrs[] = { "uSNChanged",
"objectGUID" ,
NULL };
/**
* Collects object for normal replication cycle.
*/
static WERROR getncchanges_collect_objects(struct drsuapi_bind_state *b_state,
TALLOC_CTX *mem_ctx,
struct drsuapi_DsGetNCChangesRequest10 *req10,
struct ldb_dn *search_dn,
const char *extra_filter,
struct ldb_result **search_res)
{
int ret;
char* search_filter;
enum ldb_scope scope = LDB_SCOPE_SUBTREE;
struct drsuapi_getncchanges_state *getnc_state = b_state->getncchanges_state;
bool critical_only = false;
if (req10->replica_flags & DRSUAPI_DRS_CRITICAL_ONLY) {
critical_only = true;
}
if (req10->extended_op == DRSUAPI_EXOP_REPL_OBJ ||
req10->extended_op == DRSUAPI_EXOP_REPL_SECRET) {
scope = LDB_SCOPE_BASE;
critical_only = false;
}
/* 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 (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(b_state->sam_ctx, getnc_state, search_res,
search_dn, scope,
collect_objects_attrs,
search_filter);
if (ret != LDB_SUCCESS) {
return WERR_DS_DRA_INTERNAL_ERROR;
}
return WERR_OK;
}
/**
* Collects object for normal replication cycle.
*/
static WERROR getncchanges_collect_objects_exop(struct drsuapi_bind_state *b_state,
TALLOC_CTX *mem_ctx,
struct drsuapi_DsGetNCChangesRequest10 *req10,
struct drsuapi_DsGetNCChangesCtr6 *ctr6,
struct ldb_dn *search_dn,
const char *extra_filter,
struct ldb_result **search_res)
{
/* we have nothing to do in case of ex-op failure */
if (ctr6->extended_ret != DRSUAPI_EXOP_ERR_SUCCESS) {
return WERR_OK;
}
switch (req10->extended_op) {
case DRSUAPI_EXOP_FSMO_RID_ALLOC:
{
int ret;
struct ldb_dn *ntds_dn = NULL;
struct ldb_dn *server_dn = NULL;
struct ldb_dn *machine_dn = NULL;
struct ldb_dn *rid_set_dn = NULL;
struct ldb_result *search_res2 = NULL;
struct ldb_result *search_res3 = NULL;
TALLOC_CTX *frame = talloc_stackframe();
/* get RID manager, RID set and server DN (in that order) */
/* This first search will get the RID Manager */
ret = drsuapi_search_with_extended_dn(b_state->sam_ctx, frame,
search_res,
search_dn, LDB_SCOPE_BASE,
collect_objects_attrs,
NULL);
if (ret != LDB_SUCCESS) {
DEBUG(1, ("DRSUAPI_EXOP_FSMO_RID_ALLOC: Failed to get RID Manager object %s - %s",
ldb_dn_get_linearized(search_dn),
ldb_errstring(b_state->sam_ctx)));
TALLOC_FREE(frame);
return WERR_DS_DRA_INTERNAL_ERROR;
}
if ((*search_res)->count != 1) {
DEBUG(1, ("DRSUAPI_EXOP_FSMO_RID_ALLOC: Failed to get RID Manager object %s - %u objects returned",
ldb_dn_get_linearized(search_dn),
(*search_res)->count));
TALLOC_FREE(frame);
return WERR_DS_DRA_INTERNAL_ERROR;
}
/* Now extend it to the RID set */
/* Find the computer account DN for the destination
* dsa GUID specified */
ret = dsdb_find_dn_by_guid(b_state->sam_ctx, frame,
&req10->destination_dsa_guid, 0,
&ntds_dn);
if (ret != LDB_SUCCESS) {
DEBUG(1, ("DRSUAPI_EXOP_FSMO_RID_ALLOC: Unable to find NTDS object for guid %s - %s\n",
GUID_string(frame,
&req10->destination_dsa_guid),
ldb_errstring(b_state->sam_ctx)));
TALLOC_FREE(frame);
return WERR_DS_DRA_INTERNAL_ERROR;
}
server_dn = ldb_dn_get_parent(frame, ntds_dn);
if (!server_dn) {
TALLOC_FREE(frame);
return WERR_DS_DRA_INTERNAL_ERROR;
}
ret = samdb_reference_dn(b_state->sam_ctx, frame, server_dn,
"serverReference", &machine_dn);
if (ret != LDB_SUCCESS) {
DEBUG(1, ("DRSUAPI_EXOP_FSMO_RID_ALLOC: Failed to find serverReference in %s - %s",
ldb_dn_get_linearized(server_dn),
ldb_errstring(b_state->sam_ctx)));
TALLOC_FREE(frame);
return WERR_DS_DRA_INTERNAL_ERROR;
}
ret = samdb_reference_dn(b_state->sam_ctx, frame, machine_dn,
"rIDSetReferences", &rid_set_dn);
if (ret != LDB_SUCCESS) {
DEBUG(1, ("DRSUAPI_EXOP_FSMO_RID_ALLOC: Failed to find rIDSetReferences in %s - %s",
ldb_dn_get_linearized(server_dn),
ldb_errstring(b_state->sam_ctx)));
TALLOC_FREE(frame);
return WERR_DS_DRA_INTERNAL_ERROR;
}
/* This first search will get the RID Manager, now get the RID set */
ret = drsuapi_search_with_extended_dn(b_state->sam_ctx, frame,
&search_res2,
rid_set_dn, LDB_SCOPE_BASE,
collect_objects_attrs,
NULL);
if (ret != LDB_SUCCESS) {
DEBUG(1, ("DRSUAPI_EXOP_FSMO_RID_ALLOC: Failed to get RID Set object %s - %s",
ldb_dn_get_linearized(rid_set_dn),
ldb_errstring(b_state->sam_ctx)));
TALLOC_FREE(frame);
return WERR_DS_DRA_INTERNAL_ERROR;
}
if (search_res2->count != 1) {
DEBUG(1, ("DRSUAPI_EXOP_FSMO_RID_ALLOC: Failed to get RID Set object %s - %u objects returned",
ldb_dn_get_linearized(rid_set_dn),
search_res2->count));
TALLOC_FREE(frame);
return WERR_DS_DRA_INTERNAL_ERROR;
}
/* Finally get the server DN */
ret = drsuapi_search_with_extended_dn(b_state->sam_ctx, frame,
&search_res3,
machine_dn, LDB_SCOPE_BASE,
collect_objects_attrs,
NULL);
if (ret != LDB_SUCCESS) {
DEBUG(1, ("DRSUAPI_EXOP_FSMO_RID_ALLOC: Failed to get server object %s - %s",
ldb_dn_get_linearized(server_dn),
ldb_errstring(b_state->sam_ctx)));
TALLOC_FREE(frame);
return WERR_DS_DRA_INTERNAL_ERROR;
}
if (search_res3->count != 1) {
DEBUG(1, ("DRSUAPI_EXOP_FSMO_RID_ALLOC: Failed to get server object %s - %u objects returned",
ldb_dn_get_linearized(server_dn),
search_res3->count));
TALLOC_FREE(frame);
return WERR_DS_DRA_INTERNAL_ERROR;
}
/* Now extend the original search_res with these answers */
(*search_res)->count = 3;
(*search_res)->msgs = talloc_realloc(frame, (*search_res)->msgs,
struct ldb_message *,
(*search_res)->count);
if ((*search_res)->msgs == NULL) {
TALLOC_FREE(frame);
return WERR_NOT_ENOUGH_MEMORY;
}
talloc_steal(mem_ctx, *search_res);
(*search_res)->msgs[1] =
talloc_steal((*search_res)->msgs, search_res2->msgs[0]);
(*search_res)->msgs[2] =
talloc_steal((*search_res)->msgs, search_res3->msgs[0]);
TALLOC_FREE(frame);
return WERR_OK;
}
default:
/* TODO: implement extended op specific collection
* of objects. Right now we just normal procedure
* for collecting objects */
return getncchanges_collect_objects(b_state, mem_ctx, req10, search_dn, extra_filter, search_res);
}
}
static void dcesrv_drsuapi_update_highwatermark(const struct ldb_message *msg,
uint64_t max_usn,
struct drsuapi_DsReplicaHighWaterMark *hwm)
{
uint64_t uSN = ldb_msg_find_attr_as_uint64(msg, "uSNChanged", 0);
if (uSN > max_usn) {
/*
* Only report the max_usn we had at the start
* of the replication cycle.
*
* If this object has changed lately we better
* let the destination dsa refetch the change.
* This is better than the risk of loosing some
* objects or linked attributes.
*/
return;
}
if (uSN <= hwm->tmp_highest_usn) {
return;
}
hwm->tmp_highest_usn = uSN;
hwm->reserved_usn = 0;
}
static WERROR dcesrv_drsuapi_anc_cache_add(struct db_context *anc_cache,
const struct GUID *guid)
{
enum ndr_err_code ndr_err;
uint8_t guid_buf[16] = { 0, };
DATA_BLOB b = {
.data = guid_buf,
.length = sizeof(guid_buf),
};
TDB_DATA key = {
.dptr = b.data,
.dsize = b.length,
};
TDB_DATA val = {
.dptr = NULL,
.dsize = 0,
};
NTSTATUS status;
ndr_err = ndr_push_struct_into_fixed_blob(&b, guid,
(ndr_push_flags_fn_t)ndr_push_GUID);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
return WERR_DS_DRA_INTERNAL_ERROR;
}
status = dbwrap_store(anc_cache, key, val, TDB_REPLACE);
if (!NT_STATUS_IS_OK(status)) {
return WERR_DS_DRA_INTERNAL_ERROR;
}
return WERR_OK;
}
static WERROR dcesrv_drsuapi_anc_cache_exists(struct db_context *anc_cache,
const struct GUID *guid)
{
enum ndr_err_code ndr_err;
uint8_t guid_buf[16] = { 0, };
DATA_BLOB b = {
.data = guid_buf,
.length = sizeof(guid_buf),
};
TDB_DATA key = {
.dptr = b.data,
.dsize = b.length,
};
bool exists;
ndr_err = ndr_push_struct_into_fixed_blob(&b, guid,
(ndr_push_flags_fn_t)ndr_push_GUID);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
return WERR_DS_DRA_INTERNAL_ERROR;
}
exists = dbwrap_exists(anc_cache, key);
if (!exists) {
return WERR_OBJECT_NOT_FOUND;
}
return WERR_OBJECT_NAME_EXISTS;
}
/*
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, k;
struct dsdb_schema *schema;
struct drsuapi_DsReplicaOIDMapping_Ctr *ctr;
struct drsuapi_DsReplicaObjectListItemEx **currentObject;
NTSTATUS status;
DATA_BLOB session_key;
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;
bool is_gc_pas_request;
struct drsuapi_changed_objects *changes;
time_t max_wait;
time_t start = time(NULL);
bool max_wait_reached = false;
bool has_get_all_changes = false;
struct GUID invocation_id;
static const struct drsuapi_DsReplicaLinkedAttribute no_linked_attr;
struct dsdb_schema_prefixmap *pfm_remote = NULL;
bool full = true;
uint32_t *local_pas = NULL;
struct ldb_dn *machine_dn = NULL; /* Only used for REPL SECRET EXOP */
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;
invocation_id = *(samdb_ntds_invocation_id(sam_ctx));
*r->out.level_out = 6;
/* TODO: linked attributes*/
r->out.ctr->ctr6.linked_attributes_count = 0;
r->out.ctr->ctr6.linked_attributes = discard_const_p(struct drsuapi_DsReplicaLinkedAttribute, &no_linked_attr);
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;
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.first_object = 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_NOT_ENOUGH_MEMORY;
}
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];
/* all clients must have GUID_DRS_GET_CHANGES */
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;
}
if (dsdb_functional_level(sam_ctx) >= DS_DOMAIN_FUNCTION_2008) {
full = req10->partial_attribute_set == NULL &&
req10->partial_attribute_set_ex == NULL;
} else {
full = (options & DRSUAPI_DRS_WRIT_REP) != 0;
}
werr = dsdb_schema_pfm_from_drsuapi_pfm(&req10->mapping_ctr, true,
mem_ctx, &pfm_remote, NULL);
/* We were supplied a partial attribute set, without the prefix map! */
if (!full && !W_ERROR_IS_OK(werr)) {
if (req10->mapping_ctr.num_mappings == 0) {
/*
* Despite the fact MS-DRSR specifies that this shouldn't
* happen, Windows RODCs will in fact not provide a prefixMap.
*/
DEBUG(5,(__location__ ": Failed to provide a remote prefixMap,"
" falling back to local prefixMap\n"));
} else {
DEBUG(0,(__location__ ": Failed to decode remote prefixMap: %s\n",
win_errstr(werr)));
return werr;
}
}
/* allowed if the GC PAS and client has
GUID_DRS_GET_FILTERED_ATTRIBUTES */
werr = dcesrv_drsuapi_is_gc_pas_request(b_state, req10, pfm_remote, &is_gc_pas_request);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
if (is_gc_pas_request) {
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_FILTERED_ATTRIBUTES);
if (W_ERROR_IS_OK(werr)) {
goto allowed;
}
}
werr = dcesrv_drsuapi_is_reveal_secrets_request(b_state, req10,
pfm_remote,
&is_secret_request);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
if (is_secret_request) {
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)) {
/* Only bail if this is not a EXOP_REPL_SECRET */
if (req10->extended_op != DRSUAPI_EXOP_REPL_SECRET) {
return werr;
}
} else {
has_get_all_changes = true;
}
}
allowed:
/* 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;
}
if (GUID_all_zero(&req10->source_dsa_invocation_id)) {
req10->source_dsa_invocation_id = invocation_id;
}
if (!GUID_equal(&req10->source_dsa_invocation_id, &invocation_id)) {
/*
* The given highwatermark is only valid relative to the
* specified source_dsa_invocation_id.
*/
ZERO_STRUCT(req10->highwatermark);
}
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) {
ret = drsuapi_DsReplicaHighWaterMark_cmp(&getnc_state->last_hwm,
&req10->highwatermark);
if (ret != 0) {
DEBUG(0,(__location__ ": DsGetNCChanges 2nd replication "
"on DN %s %s highwatermark (last_dn %s)\n",
ldb_dn_get_linearized(getnc_state->ncRoot_dn),
(ret > 0) ? "older" : "newer",
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_NOT_ENOUGH_MEMORY;
}
b_state->getncchanges_state = getnc_state;
getnc_state->ncRoot_dn = drs_ObjectIdentifier_to_dn(getnc_state, sam_ctx, ncRoot);
if (getnc_state->ncRoot_dn == NULL) {
return WERR_NOT_ENOUGH_MEMORY;
}
ret = dsdb_find_guid_by_dn(b_state->sam_ctx_system,
getnc_state->ncRoot_dn,
&getnc_state->ncRoot_guid);
if (ret != 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;
}
ncRoot->guid = getnc_state->ncRoot_guid;
/* find out if we are to replicate Schema NC */
ret = ldb_dn_compare_base(ldb_get_schema_basedn(b_state->sam_ctx),
getnc_state->ncRoot_dn);
getnc_state->is_schema_nc = (0 == ret);
if (req10->extended_op != DRSUAPI_EXOP_NONE) {
r->out.ctr->ctr6.extended_ret = DRSUAPI_EXOP_ERR_SUCCESS;
}
/*
* 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, &search_dn);
W_ERROR_NOT_OK_RETURN(werr);
if (r->out.ctr->ctr6.extended_ret != DRSUAPI_EXOP_ERR_SUCCESS) {
return WERR_OK;
}
break;
case DRSUAPI_EXOP_REPL_SECRET:
werr = getncchanges_repl_secret(b_state, mem_ctx, req10,
user_sid,
&r->out.ctr->ctr6,
has_get_all_changes,
&machine_dn);
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);
if (r->out.ctr->ctr6.extended_ret != DRSUAPI_EXOP_ERR_SUCCESS) {
return WERR_OK;
}
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);
if (r->out.ctr->ctr6.extended_ret != DRSUAPI_EXOP_ERR_SUCCESS) {
return WERR_OK;
}
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);
if (r->out.ctr->ctr6.extended_ret != DRSUAPI_EXOP_ERR_SUCCESS) {
return WERR_OK;
}
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;
}
ncRoot->guid = getnc_state->ncRoot_guid;
/* 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) {
const char *extra_filter;
struct ldb_result *search_res = NULL;
static const struct drsuapi_DsReplicaCursorCtrEx empty_udv;
const struct drsuapi_DsReplicaCursorCtrEx *udv = NULL;
extra_filter = lpcfg_parm_string(dce_call->conn->dce_ctx->lp_ctx, NULL, "drs", "object filter");
if (req10->extended_op == DRSUAPI_EXOP_NONE) {
if (req10->uptodateness_vector != NULL) {
udv = req10->uptodateness_vector;
} else {
udv = &empty_udv;
}
getnc_state->min_usn = req10->highwatermark.highest_usn;
for (i = 0; i < udv->count; i++) {
bool match;
const struct drsuapi_DsReplicaCursor *cur =
&udv->cursors[i];
match = GUID_equal(&invocation_id,
&cur->source_dsa_invocation_id);
if (!match) {
continue;
}
if (cur->highest_usn > getnc_state->min_usn) {
getnc_state->min_usn = cur->highest_usn;
}
break;
}
} else {
/* We do not want REPL_SECRETS or REPL_SINGLE to return empty-handed */
udv = &empty_udv;
getnc_state->min_usn = 0;
}
getnc_state->max_usn = getnc_state->min_usn;
getnc_state->final_udv = talloc_zero(getnc_state,
struct drsuapi_DsReplicaCursor2CtrEx);
if (getnc_state->final_udv == NULL) {
return WERR_NOT_ENOUGH_MEMORY;
}
werr = get_nc_changes_udv(sam_ctx, getnc_state->ncRoot_dn,
getnc_state->final_udv);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
if (req10->extended_op == DRSUAPI_EXOP_NONE) {
werr = getncchanges_collect_objects(b_state, mem_ctx, req10,
search_dn, extra_filter,
&search_res);
} else {
werr = getncchanges_collect_objects_exop(b_state, mem_ctx, req10,
&r->out.ctr->ctr6,
search_dn, extra_filter,
&search_res);
}
W_ERROR_NOT_OK_RETURN(werr);
/* extract out the GUIDs list */
getnc_state->num_records = search_res ? search_res->count : 0;
getnc_state->guids = talloc_array(getnc_state, struct GUID, getnc_state->num_records);
W_ERROR_HAVE_NO_MEMORY(getnc_state->guids);
changes = talloc_array(getnc_state,
struct drsuapi_changed_objects,
getnc_state->num_records);
W_ERROR_HAVE_NO_MEMORY(changes);
for (i=0; i<getnc_state->num_records; i++) {
changes[i].dn = search_res->msgs[i]->dn;
changes[i].guid = samdb_result_guid(search_res->msgs[i], "objectGUID");
changes[i].usn = ldb_msg_find_attr_as_uint64(search_res->msgs[i], "uSNChanged", 0);
if (changes[i].usn > getnc_state->max_usn) {
getnc_state->max_usn = changes[i].usn;
}
}
/* RID_ALLOC returns 3 objects in a fixed order */
if (req10->extended_op == DRSUAPI_EXOP_FSMO_RID_ALLOC) {
/* Do nothing */
} else {
LDB_TYPESAFE_QSORT(changes,
getnc_state->num_records,
getnc_state,
site_res_cmp_usn_order);
}
for (i=0; i < getnc_state->num_records; i++) {
getnc_state->guids[i] = changes[i].guid;
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;
}
}
getnc_state->final_hwm.tmp_highest_usn = getnc_state->max_usn;
getnc_state->final_hwm.reserved_usn = 0;
getnc_state->final_hwm.highest_usn = getnc_state->max_usn;
talloc_free(search_res);
talloc_free(changes);
if (req10->extended_op != DRSUAPI_EXOP_NONE) {
/* Do nothing */
} else if (req10->replica_flags & DRSUAPI_DRS_GET_ANC) {
getnc_state->anc_cache = db_open_rbt(getnc_state);
if (getnc_state->anc_cache == NULL) {
return WERR_NOT_ENOUGH_MEMORY;
}
}
}
if (req10->uptodateness_vector) {
/* make sure its sorted */
TYPESAFE_QSORT(req10->uptodateness_vector->cursors,
req10->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);
if (r->out.ctr->ctr6.naming_context == NULL) {
return WERR_NOT_ENOUGH_MEMORY;
}
*r->out.ctr->ctr6.naming_context = *ncRoot;
/* 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;
currentObject = &r->out.ctr->ctr6.first_object;
max_objects = lpcfg_parm_int(dce_call->conn->dce_ctx->lp_ctx, NULL, "drs", "max object sync", 1000);
/*
* The client control here only applies in normal replication, not extended
* operations, which return a fixed set, even if the caller
* sets max_object_count == 0
*/
if (req10->extended_op == DRSUAPI_EXOP_NONE) {
/* use this to force single objects at a time, which is useful
* for working out what object is giving problems
*/
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);
/*
* Maximum time that we can spend in a getncchanges
* in order to avoid timeout of the other part.
* 10 seconds by default.
*/
max_wait = lpcfg_parm_int(dce_call->conn->dce_ctx->lp_ctx, NULL, "drs", "max work time", 10);
if (req10->partial_attribute_set != NULL) {
struct dsdb_syntax_ctx syntax_ctx;
uint32_t j = 0;
dsdb_syntax_ctx_init(&syntax_ctx, b_state->sam_ctx, schema);
syntax_ctx.pfm_remote = pfm_remote;
local_pas = talloc_array(b_state, uint32_t, req10->partial_attribute_set->num_attids);
for (j = 0; j < req10->partial_attribute_set->num_attids; j++) {
getncchanges_attid_remote_to_local(schema,
&syntax_ctx,
req10->partial_attribute_set->attids[j],
(enum drsuapi_DsAttributeId *)&local_pas[j],
NULL);
}
LDB_TYPESAFE_QSORT(local_pas,
req10->partial_attribute_set->num_attids,
NULL,
uint32_t_ptr_cmp);
}
for (i=getnc_state->num_processed;
i<getnc_state->num_records &&
!null_scope &&
(r->out.ctr->ctr6.object_count < max_objects)
&& !max_wait_reached;
i++) {
struct drsuapi_DsReplicaObjectListItemEx *new_objs = NULL;
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;
const struct GUID *next_anc_guid = NULL;
obj = talloc_zero(mem_ctx, struct drsuapi_DsReplicaObjectListItemEx);
W_ERROR_HAVE_NO_MEMORY(obj);
msg_dn = ldb_dn_new_fmt(obj, sam_ctx, "<GUID=%s>", 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];
/*
* If it has already been added as an ancestor of
* an object, we don't need to do anything more,
* as we've already added the links.
*/
if (getnc_state->anc_cache != NULL) {
werr = dcesrv_drsuapi_anc_cache_exists(getnc_state->anc_cache,
&getnc_state->guids[i]);
if (W_ERROR_EQUAL(werr, WERR_OBJECT_NAME_EXISTS)) {
dcesrv_drsuapi_update_highwatermark(msg,
getnc_state->max_usn,
&r->out.ctr->ctr6.new_highwatermark);
/* no attributes to send */
talloc_free(obj);
continue;
}
}
max_wait_reached = (time(NULL) - start > max_wait);
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,
req10->uptodateness_vector,
req10->extended_op,
max_wait_reached,
local_pas, machine_dn,
&getnc_state->guids[i]);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
werr = get_nc_changes_add_links(sam_ctx, getnc_state,
getnc_state->ncRoot_dn,
getnc_state->is_schema_nc,
schema, getnc_state->min_usn,
req10->replica_flags,
msg,
&getnc_state->la_list,
&getnc_state->la_count,
req10->uptodateness_vector);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
dcesrv_drsuapi_update_highwatermark(msg,
getnc_state->max_usn,
&r->out.ctr->ctr6.new_highwatermark);
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;
}
new_objs = obj;
if (getnc_state->anc_cache != NULL) {
werr = dcesrv_drsuapi_anc_cache_add(getnc_state->anc_cache,
&getnc_state->guids[i]);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
next_anc_guid = obj->parent_object_guid;
}
while (next_anc_guid != NULL) {
struct drsuapi_DsReplicaObjectListItemEx *anc_obj = NULL;
struct ldb_message *anc_msg = NULL;
struct ldb_result *anc_res = NULL;
struct ldb_dn *anc_dn = NULL;
werr = dcesrv_drsuapi_anc_cache_exists(getnc_state->anc_cache,
next_anc_guid);
if (W_ERROR_EQUAL(werr, WERR_OBJECT_NAME_EXISTS)) {
/*
* We don't need to send it twice.
*/
break;
}
if (W_ERROR_IS_OK(werr)) {
return WERR_INTERNAL_ERROR;
}
if (!W_ERROR_EQUAL(werr, WERR_OBJECT_NOT_FOUND)) {
return werr;
}
werr = WERR_OK;
anc_obj = talloc_zero(mem_ctx,
struct drsuapi_DsReplicaObjectListItemEx);
if (anc_obj == NULL) {
return WERR_NOT_ENOUGH_MEMORY;
}
anc_dn = ldb_dn_new_fmt(anc_obj, sam_ctx, "<GUID=%s>",
GUID_string(anc_obj, next_anc_guid));
if (anc_dn == NULL) {
return WERR_NOT_ENOUGH_MEMORY;
}
ret = drsuapi_search_with_extended_dn(sam_ctx, anc_obj,
&anc_res, anc_dn,
LDB_SCOPE_BASE,
msg_attrs, NULL);
if (ret != LDB_SUCCESS) {
const char *anc_str = NULL;
const char *obj_str = NULL;
anc_str = ldb_dn_get_extended_linearized(anc_obj,
anc_dn,
1);
obj_str = ldb_dn_get_extended_linearized(anc_obj,
msg->dn,
1),
DBG_ERR("getncchanges: failed to fetch ANC "
"DN %s for DN %s - %s\n",
anc_str, obj_str,
ldb_errstring(sam_ctx));
return WERR_DS_DRA_INCONSISTENT_DIT;
}
anc_msg = anc_res->msgs[0];
werr = get_nc_changes_build_object(anc_obj, anc_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,
req10->uptodateness_vector,
req10->extended_op,
false, /* force_object_return */
local_pas,
machine_dn,
next_anc_guid);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
werr = get_nc_changes_add_links(sam_ctx, getnc_state,
getnc_state->ncRoot_dn,
getnc_state->is_schema_nc,
schema, getnc_state->min_usn,
req10->replica_flags,
anc_msg,
&getnc_state->la_list,
&getnc_state->la_count,
req10->uptodateness_vector);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
/*
* Regardless of if we actually use it or not,
* we add it to the cache so we don't look at it again
*/
werr = dcesrv_drsuapi_anc_cache_add(getnc_state->anc_cache,
next_anc_guid);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
/*
* Any ancestors which are below the highwatermark
* or uptodateness_vector shouldn't be added,
* but we still look further up the
* tree for ones which have been changed recently.
*/
if (anc_obj->meta_data_ctr != NULL) {
/*
* prepend it to the list
*/
anc_obj->next_object = new_objs;
new_objs = anc_obj;
}
anc_msg = NULL;
TALLOC_FREE(anc_res);
TALLOC_FREE(anc_dn);
/*
* We may need to resolve more...
*/
next_anc_guid = anc_obj->parent_object_guid;
}
*currentObject = new_objs;
while (new_objs != NULL) {
r->out.ctr->ctr6.object_count += 1;
if (new_objs->next_object == NULL) {
currentObject = &new_objs->next_object;
}
new_objs = new_objs->next_object;
}
DEBUG(8,(__location__ ": replicating object %s\n", ldb_dn_get_linearized(msg->dn)));
talloc_free(getnc_state->last_dn);
getnc_state->last_dn = talloc_move(getnc_state, &msg->dn);
talloc_free(msg_res);
talloc_free(msg_dn);
}
getnc_state->num_processed = i;
/* 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 = samdb_ntds_msdcs_dns_name(b_state->sam_ctx, mem_ctx,
&req10->destination_dsa_guid);
if (!ureq.dest_dsa_dns_name) {
return WERR_NOT_ENOUGH_MEMORY;
}
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(dce_call->msg_ctx,
dce_call->event_ctx, b_state,
mem_ctx, &ureq);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,(__location__ ": Failed UpdateRefs on %s for %s in DsGetNCChanges - %s\n",
drs_ObjectIdentifier_to_string(mem_ctx, ncRoot), ureq.dest_dsa_dns_name,
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 == NULL) {
int j;
struct la_for_sorting *guid_array = talloc_array(getnc_state, struct la_for_sorting, getnc_state->la_count);
if (guid_array == NULL) {
DEBUG(0, ("Out of memory allocating %u linked attributes for sorting", getnc_state->la_count));
return WERR_NOT_ENOUGH_MEMORY;
}
for (j = 0; j < getnc_state->la_count; j++) {
/* we need to get the target GUIDs to compare */
struct dsdb_dn *dn;
const struct drsuapi_DsReplicaLinkedAttribute *la = &getnc_state->la_list[j];
const struct dsdb_attribute *schema_attrib;
const struct ldb_val *target_guid;
DATA_BLOB source_guid;
TALLOC_CTX *frame = talloc_stackframe();
schema_attrib = dsdb_attribute_by_attributeID_id(schema, la->attid);
werr = dsdb_dn_la_from_blob(sam_ctx, schema_attrib, schema, frame, la->value.blob, &dn);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,(__location__ ": Bad la blob in sort\n"));
TALLOC_FREE(frame);
return werr;
}
/* Extract the target GUID in NDR form */
target_guid = ldb_dn_get_extended_component(dn->dn, "GUID");
if (target_guid == NULL
|| target_guid->length != sizeof(guid_array[0].target_guid)) {
status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
} else {
/* Repack the source GUID as NDR for sorting */
status = GUID_to_ndr_blob(&la->identifier->guid,
frame,
&source_guid);
}
if (!NT_STATUS_IS_OK(status)
|| source_guid.length != sizeof(guid_array[0].source_guid)) {
DEBUG(0,(__location__ ": Bad la guid in sort\n"));
TALLOC_FREE(frame);
return ntstatus_to_werror(status);
}
guid_array[j].link = &getnc_state->la_list[j];
memcpy(guid_array[j].target_guid, target_guid->data,
sizeof(guid_array[j].target_guid));
memcpy(guid_array[j].source_guid, source_guid.data,
sizeof(guid_array[j].source_guid));
TALLOC_FREE(frame);
}
LDB_TYPESAFE_QSORT(guid_array, getnc_state->la_count, NULL, linked_attribute_compare);
getnc_state->la_sorted = guid_array;
}
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 = talloc_array(r->out.ctr, struct drsuapi_DsReplicaLinkedAttribute, link_count);
if (r->out.ctr->ctr6.linked_attributes == NULL) {
DEBUG(0, ("Out of memory allocating %u linked attributes for output", link_count));
return WERR_NOT_ENOUGH_MEMORY;
}
for (k = 0; k < link_count; k++) {
r->out.ctr->ctr6.linked_attributes[k]
= *getnc_state->la_sorted[getnc_state->la_idx + k].link;
}
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 (req10->replica_flags & DRSUAPI_DRS_GET_NC_SIZE) {
/*
* TODO: This implementation is wrong
* we should find out the total number of
* objects and links in the whole naming context
* at the start of the cycle and return these
* values in each message.
*
* For now we keep our current strategy and return
* the number of objects for this cycle and the number
* of links we found so far during the cycle.
*/
r->out.ctr->ctr6.nc_object_count = getnc_state->num_records;
r->out.ctr->ctr6.nc_linked_attributes_count = getnc_state->la_count;
}
if (!r->out.ctr->ctr6.more_data) {
talloc_steal(mem_ctx, getnc_state->la_list);
r->out.ctr->ctr6.new_highwatermark = getnc_state->final_hwm;
r->out.ctr->ctr6.uptodateness_vector = talloc_move(mem_ctx,
&getnc_state->final_udv);
talloc_free(getnc_state);
b_state->getncchanges_state = NULL;
} else {
ret = drsuapi_DsReplicaHighWaterMark_cmp(&r->out.ctr->ctr6.old_highwatermark,
&r->out.ctr->ctr6.new_highwatermark);
if (ret == 0) {
/*
* We need to make sure that we never return the
* same highwatermark within the same replication
* cycle more than once. Otherwise we cannot detect
* when the client uses an unexptected highwatermark.
*
* This is a HACK which is needed because our
* object ordering is wrong and set tmp_highest_usn
* to a value that is higher than what we already
* sent to the client (destination dsa).
*/
r->out.ctr->ctr6.new_highwatermark.reserved_usn += 1;
}
getnc_state->last_hwm = r->out.ctr->ctr6.new_highwatermark;
}
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);
}
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;
}
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