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/*
ldb database library - ldif handlers for Samba
Copyright (C) Andrew Tridgell 2005
Copyright (C) Andrew Bartlett 2006-2007
** 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "lib/ldb/include/ldb_includes.h"
#include "dsdb/samdb/samdb.h"
#include "librpc/gen_ndr/ndr_security.h"
#include "librpc/gen_ndr/ndr_misc.h"
#include "libcli/security/security.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)
{
enum ndr_err_code ndr_err;
struct dom_sid *sid;
sid = dom_sid_parse_talloc(mem_ctx, (const char *)in->data);
if (sid == NULL) {
return -1;
}
ndr_err = ndr_push_struct_blob(out, mem_ctx, NULL, sid,
(ndr_push_flags_fn_t)ndr_push_dom_sid);
talloc_free(sid);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
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;
enum ndr_err_code ndr_err;
sid = talloc(mem_ctx, struct dom_sid);
if (sid == NULL) {
return -1;
}
ndr_err = ndr_pull_struct_blob(in, sid, NULL, sid,
(ndr_pull_flags_fn_t)ndr_pull_dom_sid);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
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)
{
if (v->length < 3) {
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) && ldb_comparision_objectSid_isString(v2)) {
return strcmp((const char *)v1->data, (const char *)v2->data);
} else if (ldb_comparision_objectSid_isString(v1)
&& !ldb_comparision_objectSid_isString(v2)) {
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;
} else if (!ldb_comparision_objectSid_isString(v1)
&& ldb_comparision_objectSid_isString(v2)) {
struct ldb_val v;
int ret;
if (ldif_read_objectSid(ldb, mem_ctx, v2, &v) != 0) {
return -1;
}
ret = ldb_comparison_binary(ldb, mem_ctx, v1, &v);
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;
enum ndr_err_code ndr_err;
status = GUID_from_string((const char *)in->data, &guid);
if (!NT_STATUS_IS_OK(status)) {
return -1;
}
ndr_err = ndr_push_struct_blob(out, mem_ctx, NULL, &guid,
(ndr_push_flags_fn_t)ndr_push_GUID);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
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;
enum ndr_err_code ndr_err;
ndr_err = ndr_pull_struct_blob(in, mem_ctx, NULL, &guid,
(ndr_pull_flags_fn_t)ndr_pull_GUID);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
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;
if (v->length < 33) return false;
/* see if the input if null-terninated (safety check for the below) */
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) && ldb_comparision_objectGUID_isString(v2)) {
return strcmp((const char *)v1->data, (const char *)v2->data);
} else if (ldb_comparision_objectGUID_isString(v1)
&& !ldb_comparision_objectGUID_isString(v2)) {
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;
} else if (!ldb_comparision_objectGUID_isString(v1)
&& ldb_comparision_objectGUID_isString(v2)) {
struct ldb_val v;
int ret;
if (ldif_read_objectGUID(ldb, mem_ctx, v2, &v) != 0) {
return -1;
}
ret = ldb_comparison_binary(ldb, mem_ctx, v1, &v);
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;
enum ndr_err_code ndr_err;
sd = sddl_decode(mem_ctx, (const char *)in->data, NULL);
if (sd == NULL) {
return -1;
}
ndr_err = ndr_push_struct_blob(out, mem_ctx, NULL, sd,
(ndr_push_flags_fn_t)ndr_push_security_descriptor);
talloc_free(sd);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
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;
enum ndr_err_code ndr_err;
sd = talloc(mem_ctx, struct security_descriptor);
if (sd == NULL) {
return -1;
}
ndr_err = ndr_pull_struct_blob(in, sd, NULL, sd,
(ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
talloc_free(sd);
return -1;
}
out->data = (uint8_t *)sddl_encode(mem_ctx, sd, NULL);
talloc_free(sd);
if (out->data == NULL) {
return -1;
}
out->length = strlen((const char *)out->data);
return 0;
}
/*
canonicalise an objectCategory. We use the short form as the cannoical form:
cn=Person,cn=Schema,cn=Configuration,<basedn> becomes 'person'
*/
static int ldif_canonicalise_objectCategory(struct ldb_context *ldb, void *mem_ctx,
const struct ldb_val *in, struct ldb_val *out)
{
struct ldb_dn *dn1 = NULL;
const struct dsdb_schema *schema = dsdb_get_schema(ldb);
const struct dsdb_class *class;
TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
if (!tmp_ctx) {
return LDB_ERR_OPERATIONS_ERROR;
}
if (!schema) {
*out = data_blob_talloc(mem_ctx, in->data, in->length);
if (in->data && !out->data) {
return LDB_ERR_OPERATIONS_ERROR;
}
return LDB_SUCCESS;
}
dn1 = ldb_dn_new(tmp_ctx, ldb, (char *)in->data);
if ( ! ldb_dn_validate(dn1)) {
const char *lDAPDisplayName = talloc_strndup(tmp_ctx, (char *)in->data, in->length);
class = dsdb_class_by_lDAPDisplayName(schema, lDAPDisplayName);
if (class) {
struct ldb_dn *dn = ldb_dn_new(mem_ctx, ldb,
class->defaultObjectCategory);
*out = data_blob_string_const(ldb_dn_alloc_casefold(mem_ctx, dn));
talloc_free(tmp_ctx);
if (!out->data) {
return LDB_ERR_OPERATIONS_ERROR;
}
return LDB_SUCCESS;
} else {
*out = data_blob_talloc(mem_ctx, in->data, in->length);
talloc_free(tmp_ctx);
if (in->data && !out->data) {
return LDB_ERR_OPERATIONS_ERROR;
}
return LDB_SUCCESS;
}
}
*out = data_blob_string_const(ldb_dn_alloc_casefold(mem_ctx, dn1));
talloc_free(tmp_ctx);
if (!out->data) {
return LDB_ERR_OPERATIONS_ERROR;
}
return LDB_SUCCESS;
}
static int ldif_comparison_objectCategory(struct ldb_context *ldb, void *mem_ctx,
const struct ldb_val *v1,
const struct ldb_val *v2)
{
int ret, ret1, ret2;
struct ldb_val v1_canon, v2_canon;
TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
/* I could try and bail if tmp_ctx was NULL, but what return
* value would I use?
*
* It seems easier to continue on the NULL context
*/
ret1 = ldif_canonicalise_objectCategory(ldb, tmp_ctx, v1, &v1_canon);
ret2 = ldif_canonicalise_objectCategory(ldb, tmp_ctx, v2, &v2_canon);
if (ret1 == LDB_SUCCESS && ret2 == LDB_SUCCESS) {
ret = data_blob_cmp(&v1_canon, &v2_canon);
} else {
ret = data_blob_cmp(v1, v2);
}
talloc_free(tmp_ctx);
return ret;
}
#define LDB_SYNTAX_SAMBA_SID "LDB_SYNTAX_SAMBA_SID"
#define LDB_SYNTAX_SAMBA_SECURITY_DESCRIPTOR "LDB_SYNTAX_SAMBA_SECURITY_DESCRIPTOR"
#define LDB_SYNTAX_SAMBA_GUID "LDB_SYNTAX_SAMBA_GUID"
#define LDB_SYNTAX_SAMBA_OBJECT_CATEGORY "LDB_SYNTAX_SAMBA_OBJECT_CATEGORY"
static const struct ldb_schema_syntax samba_syntaxes[] = {
{
.name = LDB_SYNTAX_SAMBA_SID,
.ldif_read_fn = ldif_read_objectSid,
.ldif_write_fn = ldif_write_objectSid,
.canonicalise_fn= ldb_canonicalise_objectSid,
.comparison_fn = ldb_comparison_objectSid
},{
.name = LDB_SYNTAX_SAMBA_SECURITY_DESCRIPTOR,
.ldif_read_fn = ldif_read_ntSecurityDescriptor,
.ldif_write_fn = ldif_write_ntSecurityDescriptor,
.canonicalise_fn= ldb_handler_copy,
.comparison_fn = ldb_comparison_binary
},{
.name = LDB_SYNTAX_SAMBA_GUID,
.ldif_read_fn = ldif_read_objectGUID,
.ldif_write_fn = ldif_write_objectGUID,
.canonicalise_fn= ldb_canonicalise_objectGUID,
.comparison_fn = ldb_comparison_objectGUID
},{
.name = LDB_SYNTAX_SAMBA_OBJECT_CATEGORY,
.ldif_read_fn = ldb_handler_copy,
.ldif_write_fn = ldb_handler_copy,
.canonicalise_fn= ldif_canonicalise_objectCategory,
.comparison_fn = ldif_comparison_objectCategory
}
};
static const struct {
const char *name;
const char *syntax;
} samba_attributes[] = {
{ "objectSid", LDB_SYNTAX_SAMBA_SID },
{ "securityIdentifier", LDB_SYNTAX_SAMBA_SID },
{ "ntSecurityDescriptor", LDB_SYNTAX_SAMBA_SECURITY_DESCRIPTOR },
{ "objectGUID", LDB_SYNTAX_SAMBA_GUID },
{ "invocationId", LDB_SYNTAX_SAMBA_GUID },
{ "schemaIDGUID", LDB_SYNTAX_SAMBA_GUID },
{ "attributeSecurityGUID", LDB_SYNTAX_SAMBA_GUID },
{ "parentGUID", LDB_SYNTAX_SAMBA_GUID },
{ "siteGUID", LDB_SYNTAX_SAMBA_GUID },
{ "pKTGUID", LDB_SYNTAX_SAMBA_GUID },
{ "fRSVersionGUID", LDB_SYNTAX_SAMBA_GUID },
{ "fRSReplicaSetGUID", LDB_SYNTAX_SAMBA_GUID },
{ "netbootGUID", LDB_SYNTAX_SAMBA_GUID },
{ "objectCategory", LDB_SYNTAX_SAMBA_OBJECT_CATEGORY },
{ "member", LDB_SYNTAX_DN },
{ "memberOf", LDB_SYNTAX_DN },
{ "nCName", LDB_SYNTAX_DN },
{ "schemaNamingContext", LDB_SYNTAX_DN },
{ "configurationNamingContext", LDB_SYNTAX_DN },
{ "rootDomainNamingContext", LDB_SYNTAX_DN },
{ "defaultNamingContext", LDB_SYNTAX_DN },
{ "subRefs", LDB_SYNTAX_DN },
{ "dMDLocation", LDB_SYNTAX_DN },
{ "serverReference", LDB_SYNTAX_DN },
{ "masteredBy", LDB_SYNTAX_DN },
{ "msDs-masteredBy", LDB_SYNTAX_DN },
{ "fSMORoleOwner", LDB_SYNTAX_DN },
};
/*
register the samba ldif handlers
*/
int ldb_register_samba_handlers(struct ldb_context *ldb)
{
uint32_t i;
for (i=0; i < ARRAY_SIZE(samba_attributes); i++) {
int ret;
uint32_t j;
const struct ldb_schema_syntax *s = NULL;
for (j=0; j < ARRAY_SIZE(samba_syntaxes); j++) {
if (strcmp(samba_attributes[i].syntax, samba_syntaxes[j].name) == 0) {
s = &samba_syntaxes[j];
break;
}
}
if (!s) {
s = ldb_standard_syntax_by_name(ldb, samba_attributes[i].syntax);
}
if (!s) {
return -1;
}
ret = ldb_schema_attribute_add_with_syntax(ldb, samba_attributes[i].name, 0, s);
if (ret != LDB_SUCCESS) {
return ret;
}
}
return LDB_SUCCESS;
}
|