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/*
Unix SMB/CIFS implementation.
implement the DRSUpdateRefs call
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 <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "rpc_server/dcerpc_server.h"
#include "dsdb/samdb/samdb.h"
#include "rpc_server/drsuapi/dcesrv_drsuapi.h"
#include "libcli/security/security.h"
#include "auth/session.h"
#include "librpc/gen_ndr/ndr_drsuapi.h"
struct repsTo {
uint32_t count;
struct repsFromToBlob *r;
};
/*
add a replication destination for a given partition GUID
*/
static WERROR uref_add_dest(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
struct ldb_dn *dn, struct repsFromTo1 *dest,
uint32_t options)
{
struct repsTo reps;
WERROR werr;
unsigned int i;
werr = dsdb_loadreps(sam_ctx, mem_ctx, dn, "repsTo", &reps.r, &reps.count);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
for (i=0; i<reps.count; i++) {
if (GUID_compare(&dest->source_dsa_obj_guid,
&reps.r[i].ctr.ctr1.source_dsa_obj_guid) == 0) {
if (options & DRSUAPI_DRS_GETCHG_CHECK) {
return WERR_OK;
} else {
return WERR_DS_DRA_REF_ALREADY_EXISTS;
}
}
}
reps.r = talloc_realloc(mem_ctx, reps.r, struct repsFromToBlob, reps.count+1);
if (reps.r == NULL) {
return WERR_DS_DRA_INTERNAL_ERROR;
}
ZERO_STRUCT(reps.r[reps.count]);
reps.r[reps.count].version = 1;
reps.r[reps.count].ctr.ctr1 = *dest;
/* add the GCSPN flag if the client asked for it */
reps.r[reps.count].ctr.ctr1.replica_flags |= (options & DRSUAPI_DRS_REF_GCSPN);
reps.count++;
werr = dsdb_savereps(sam_ctx, mem_ctx, dn, "repsTo", reps.r, reps.count);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
return WERR_OK;
}
/*
delete a replication destination for a given partition GUID
*/
static WERROR uref_del_dest(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
struct ldb_dn *dn, struct GUID *dest_guid,
uint32_t options)
{
struct repsTo reps;
WERROR werr;
unsigned int i;
bool found = false;
werr = dsdb_loadreps(sam_ctx, mem_ctx, dn, "repsTo", &reps.r, &reps.count);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
for (i=0; i<reps.count; i++) {
if (GUID_compare(dest_guid, &reps.r[i].ctr.ctr1.source_dsa_obj_guid) == 0) {
if (i+1 < reps.count) {
memmove(&reps.r[i], &reps.r[i+1], sizeof(reps.r[i])*(reps.count-(i+1)));
}
reps.count--;
found = true;
}
}
werr = dsdb_savereps(sam_ctx, mem_ctx, dn, "repsTo", reps.r, reps.count);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
if (!found &&
!(options & DRSUAPI_DRS_GETCHG_CHECK) &&
!(options & DRSUAPI_DRS_ADD_REF)) {
return WERR_DS_DRA_REF_NOT_FOUND;
}
return WERR_OK;
}
/*
drsuapi_DsReplicaUpdateRefs - a non RPC version callable from getncchanges
*/
WERROR drsuapi_UpdateRefs(struct drsuapi_bind_state *b_state, TALLOC_CTX *mem_ctx,
struct drsuapi_DsReplicaUpdateRefsRequest1 *req)
{
WERROR werr;
struct ldb_dn *dn;
struct ldb_context *sam_ctx = b_state->sam_ctx_system?b_state->sam_ctx_system:b_state->sam_ctx;
DEBUG(4,("DsReplicaUpdateRefs for host '%s' with GUID %s options 0x%08x nc=%s\n",
req->dest_dsa_dns_name, GUID_string(mem_ctx, &req->dest_dsa_guid),
req->options,
drs_ObjectIdentifier_to_string(mem_ctx, req->naming_context)));
dn = ldb_dn_new(mem_ctx, sam_ctx, req->naming_context->dn);
if (dn == NULL) {
return WERR_DS_INVALID_DN_SYNTAX;
}
if (ldb_transaction_start(sam_ctx) != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to start transaction on samdb: %s\n",
ldb_errstring(sam_ctx)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
if (req->options & DRSUAPI_DRS_DEL_REF) {
werr = uref_del_dest(sam_ctx, mem_ctx, dn, &req->dest_dsa_guid, req->options);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,("Failed to delete repsTo for %s: %s\n",
GUID_string(mem_ctx, &req->dest_dsa_guid),
win_errstr(werr)));
goto failed;
}
}
if (req->options & DRSUAPI_DRS_ADD_REF) {
struct repsFromTo1 dest;
struct repsFromTo1OtherInfo oi;
ZERO_STRUCT(dest);
ZERO_STRUCT(oi);
oi.dns_name = req->dest_dsa_dns_name;
dest.other_info = &oi;
dest.source_dsa_obj_guid = req->dest_dsa_guid;
dest.replica_flags = req->options;
werr = uref_add_dest(sam_ctx, mem_ctx, dn, &dest, req->options);
if (!W_ERROR_IS_OK(werr)) {
DEBUG(0,("Failed to add repsTo for %s: %s\n",
GUID_string(mem_ctx, &dest.source_dsa_obj_guid),
win_errstr(werr)));
goto failed;
}
}
if (ldb_transaction_commit(sam_ctx) != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to commit transaction on samdb: %s\n",
ldb_errstring(sam_ctx)));
return WERR_DS_DRA_INTERNAL_ERROR;
}
return WERR_OK;
failed:
ldb_transaction_cancel(sam_ctx);
return werr;
}
/*
drsuapi_DsReplicaUpdateRefs
*/
WERROR dcesrv_drsuapi_DsReplicaUpdateRefs(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
struct drsuapi_DsReplicaUpdateRefs *r)
{
struct dcesrv_handle *h;
struct drsuapi_bind_state *b_state;
struct drsuapi_DsReplicaUpdateRefsRequest1 *req;
WERROR werr;
int ret;
enum security_user_level security_level;
DCESRV_PULL_HANDLE_WERR(h, r->in.bind_handle, DRSUAPI_BIND_HANDLE);
b_state = h->data;
if (r->in.level != 1) {
DEBUG(0,("DrReplicUpdateRefs - unsupported level %u\n", r->in.level));
return WERR_DS_DRA_INVALID_PARAMETER;
}
req = &r->in.req.req1;
werr = drs_security_access_check(b_state->sam_ctx,
mem_ctx,
dce_call->conn->auth_state.session_info->security_token,
req->naming_context,
GUID_DRS_MANAGE_TOPOLOGY);
if (!W_ERROR_IS_OK(werr)) {
return werr;
}
security_level = security_session_user_level(dce_call->conn->auth_state.session_info, NULL);
if (security_level < SECURITY_ADMINISTRATOR) {
/* check that they are using an DSA objectGUID that they own */
ret = dsdb_validate_dsa_guid(b_state->sam_ctx,
&req->dest_dsa_guid,
&dce_call->conn->auth_state.session_info->security_token->sids[PRIMARY_USER_SID_INDEX]);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Refusing DsReplicaUpdateRefs for sid %s with GUID %s\n",
dom_sid_string(mem_ctx,
&dce_call->conn->auth_state.session_info->security_token->sids[PRIMARY_USER_SID_INDEX]),
GUID_string(mem_ctx, &req->dest_dsa_guid)));
return WERR_DS_DRA_ACCESS_DENIED;
}
}
werr = drsuapi_UpdateRefs(b_state, mem_ctx, req);
#if 0
NDR_PRINT_FUNCTION_DEBUG(drsuapi_DsReplicaUpdateRefs, NDR_BOTH, r);
#endif
return werr;
}
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