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/*
ldb database library - ldif handlers for Samba
Copyright (C) Andrew Tridgell 2005
** NOTE! The following LGPL license applies to the ldb
** library. This does NOT imply that all of Samba is released
** under the LGPL
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "includes.h"
#include "ldb/include/ldb.h"
#include "ldb/include/ldb_private.h"
#include "librpc/gen_ndr/ndr_security.h"
#include "librpc/gen_ndr/ndr_misc.h"
#include "dsdb/samdb/samdb.h"
/*
convert a ldif formatted objectSid to a NDR formatted blob
*/
static int ldif_read_objectSid(struct ldb_context *ldb, void *mem_ctx,
const struct ldb_val *in, struct ldb_val *out)
{
struct dom_sid *sid;
NTSTATUS status;
sid = dom_sid_parse_talloc(mem_ctx, (const char *)in->data);
if (sid == NULL) {
return -1;
}
status = ndr_push_struct_blob(out, mem_ctx, sid,
(ndr_push_flags_fn_t)ndr_push_dom_sid);
talloc_free(sid);
if (!NT_STATUS_IS_OK(status)) {
return -1;
}
return 0;
}
/*
convert a NDR formatted blob to a ldif formatted objectSid
*/
static int ldif_write_objectSid(struct ldb_context *ldb, void *mem_ctx,
const struct ldb_val *in, struct ldb_val *out)
{
struct dom_sid *sid;
NTSTATUS status;
sid = talloc(mem_ctx, struct dom_sid);
if (sid == NULL) {
return -1;
}
status = ndr_pull_struct_blob(in, sid, sid,
(ndr_pull_flags_fn_t)ndr_pull_dom_sid);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(sid);
return -1;
}
out->data = (uint8_t *)dom_sid_string(mem_ctx, sid);
talloc_free(sid);
if (out->data == NULL) {
return -1;
}
out->length = strlen((const char *)out->data);
return 0;
}
static BOOL ldb_comparision_objectSid_isString(const struct ldb_val *v)
{
/* see if the input if null-terninated */
if (v->data[v->length] != '\0') return False;
if (strncmp("S-", (const char *)v->data, 2) != 0) return False;
return True;
}
/*
compare two objectSids
*/
static int ldb_comparison_objectSid(struct ldb_context *ldb, void *mem_ctx,
const struct ldb_val *v1, const struct ldb_val *v2)
{
if (ldb_comparision_objectSid_isString(v1)) {
if (ldb_comparision_objectSid_isString(v1)) {
return strcmp((const char *)v1->data, (const char *)v2->data);
} else {
struct ldb_val v;
int ret;
if (ldif_read_objectSid(ldb, mem_ctx, v1, &v) != 0) {
return -1;
}
ret = ldb_comparison_binary(ldb, mem_ctx, &v, v2);
talloc_free(v.data);
return ret;
}
}
return ldb_comparison_binary(ldb, mem_ctx, v1, v2);
}
/*
canonicalise a objectSid
*/
static int ldb_canonicalise_objectSid(struct ldb_context *ldb, void *mem_ctx,
const struct ldb_val *in, struct ldb_val *out)
{
if (ldb_comparision_objectSid_isString(in)) {
return ldif_read_objectSid(ldb, mem_ctx, in, out);
}
return ldb_handler_copy(ldb, mem_ctx, in, out);
}
/*
convert a ldif formatted objectGUID to a NDR formatted blob
*/
static int ldif_read_objectGUID(struct ldb_context *ldb, void *mem_ctx,
const struct ldb_val *in, struct ldb_val *out)
{
struct GUID guid;
NTSTATUS status;
status = GUID_from_string((const char *)in->data, &guid);
if (!NT_STATUS_IS_OK(status)) {
return -1;
}
status = ndr_push_struct_blob(out, mem_ctx, &guid,
(ndr_push_flags_fn_t)ndr_push_GUID);
if (!NT_STATUS_IS_OK(status)) {
return -1;
}
return 0;
}
/*
convert a NDR formatted blob to a ldif formatted objectGUID
*/
static int ldif_write_objectGUID(struct ldb_context *ldb, void *mem_ctx,
const struct ldb_val *in, struct ldb_val *out)
{
struct GUID guid;
NTSTATUS status;
status = ndr_pull_struct_blob(in, mem_ctx, &guid,
(ndr_pull_flags_fn_t)ndr_pull_GUID);
if (!NT_STATUS_IS_OK(status)) {
return -1;
}
out->data = (uint8_t *)GUID_string(mem_ctx, &guid);
if (out->data == NULL) {
return -1;
}
out->length = strlen((const char *)out->data);
return 0;
}
static BOOL ldb_comparision_objectGUID_isString(const struct ldb_val *v)
{
struct GUID guid;
NTSTATUS status;
/* see if the input if null-terninated */
if (v->data[v->length] != '\0') return False;
status = GUID_from_string((const char *)v->data, &guid);
if (!NT_STATUS_IS_OK(status)) {
return False;
}
return True;
}
/*
compare two objectGUIDs
*/
static int ldb_comparison_objectGUID(struct ldb_context *ldb, void *mem_ctx,
const struct ldb_val *v1, const struct ldb_val *v2)
{
if (ldb_comparision_objectGUID_isString(v1)) {
if (ldb_comparision_objectGUID_isString(v2)) {
return strcmp((const char *)v1->data, (const char *)v2->data);
} else {
struct ldb_val v;
int ret;
if (ldif_read_objectGUID(ldb, mem_ctx, v1, &v) != 0) {
return -1;
}
ret = ldb_comparison_binary(ldb, mem_ctx, &v, v2);
talloc_free(v.data);
return ret;
}
}
return ldb_comparison_binary(ldb, mem_ctx, v1, v2);
}
/*
canonicalise a objectGUID
*/
static int ldb_canonicalise_objectGUID(struct ldb_context *ldb, void *mem_ctx,
const struct ldb_val *in, struct ldb_val *out)
{
if (ldb_comparision_objectGUID_isString(in)) {
return ldif_read_objectGUID(ldb, mem_ctx, in, out);
}
return ldb_handler_copy(ldb, mem_ctx, in, out);
}
/*
convert a ldif (SDDL) formatted ntSecurityDescriptor to a NDR formatted blob
*/
static int ldif_read_ntSecurityDescriptor(struct ldb_context *ldb, void *mem_ctx,
const struct ldb_val *in, struct ldb_val *out)
{
struct security_descriptor *sd;
NTSTATUS status;
const struct dom_sid *domain_sid = samdb_domain_sid(ldb);
if (domain_sid == NULL) {
return ldb_handler_copy(ldb, mem_ctx, in, out);
}
sd = sddl_decode(mem_ctx, (const char *)in->data, domain_sid);
if (sd == NULL) {
return -1;
}
status = ndr_push_struct_blob(out, mem_ctx, sd,
(ndr_push_flags_fn_t)ndr_push_security_descriptor);
talloc_free(sd);
if (!NT_STATUS_IS_OK(status)) {
return -1;
}
return 0;
}
/*
convert a NDR formatted blob to a ldif formatted ntSecurityDescriptor (SDDL format)
*/
static int ldif_write_ntSecurityDescriptor(struct ldb_context *ldb, void *mem_ctx,
const struct ldb_val *in, struct ldb_val *out)
{
struct security_descriptor *sd;
NTSTATUS status;
const struct dom_sid *domain_sid = samdb_domain_sid(ldb);
if (domain_sid == NULL) {
return ldb_handler_copy(ldb, mem_ctx, in, out);
}
sd = talloc(mem_ctx, struct security_descriptor);
if (sd == NULL) {
return -1;
}
status = ndr_pull_struct_blob(in, sd, sd,
(ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(sd);
return -1;
}
out->data = (uint8_t *)sddl_encode(mem_ctx, sd, domain_sid);
talloc_free(sd);
if (out->data == NULL) {
return -1;
}
out->length = strlen((const char *)out->data);
return 0;
}
static const struct ldb_attrib_handler samba_handlers[] = {
{
.attr = "objectSid",
.flags = 0,
.ldif_read_fn = ldif_read_objectSid,
.ldif_write_fn = ldif_write_objectSid,
.canonicalise_fn = ldb_canonicalise_objectSid,
.comparison_fn = ldb_comparison_objectSid
},
{
.attr = "securityIdentifier",
.flags = 0,
.ldif_read_fn = ldif_read_objectSid,
.ldif_write_fn = ldif_write_objectSid,
.canonicalise_fn = ldb_canonicalise_objectSid,
.comparison_fn = ldb_comparison_objectSid
},
{
.attr = "ntSecurityDescriptor",
.flags = 0,
.ldif_read_fn = ldif_read_ntSecurityDescriptor,
.ldif_write_fn = ldif_write_ntSecurityDescriptor,
.canonicalise_fn = ldb_handler_copy,
.comparison_fn = ldb_comparison_binary
},
{
.attr = "objectGUID",
.flags = 0,
.ldif_read_fn = ldif_read_objectGUID,
.ldif_write_fn = ldif_write_objectGUID,
.canonicalise_fn = ldb_canonicalise_objectGUID,
.comparison_fn = ldb_comparison_objectGUID
},
{
.attr = "invocationId",
.flags = 0,
.ldif_read_fn = ldif_read_objectGUID,
.ldif_write_fn = ldif_write_objectGUID,
.canonicalise_fn = ldb_canonicalise_objectGUID,
.comparison_fn = ldb_comparison_objectGUID
},
{
.attr = "schemaIDGUID",
.flags = 0,
.ldif_read_fn = ldif_read_objectGUID,
.ldif_write_fn = ldif_write_objectGUID,
.canonicalise_fn = ldb_canonicalise_objectGUID,
.comparison_fn = ldb_comparison_objectGUID
}
};
/*
register the samba ldif handlers
*/
int ldb_register_samba_handlers(struct ldb_context *ldb)
{
return ldb_set_attrib_handlers(ldb, samba_handlers, ARRAY_SIZE(samba_handlers));
}
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