/*
- ldb database library
+ ldb database library
- Copyright (C) Simo Sorce 2006-2008
- Copyright (C) Nadezhda Ivanova 2009
- Copyright (C) Anatoliy Atanasov 2009
+ Copyright (C) Simo Sorce 2006-2008
+ Copyright (C) Nadezhda Ivanova 2009
+ Copyright (C) Anatoliy Atanasov 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 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.
+ 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/>.
+ 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 "ldb_module.h"
#include "auth/auth.h"
#include "libcli/security/security.h"
-#include "librpc/gen_ndr/ndr_security.h"
#include "dsdb/samdb/samdb.h"
#include "librpc/gen_ndr/ndr_security.h"
#include "param/param.h"
-
-/* acl_search helper */
-struct acl_context {
-
- struct ldb_module *module;
- struct ldb_request *req;
- struct ldb_request *down_req;
-
- /*needed if we have to identify if this is SYSTEM_USER*/
- enum security_user_level user_type;
-
- uint32_t access_needed;
- struct ldb_dn * dn_to_check;
-
- /* set to true when we need to process the request as a SYSTEM_USER, regardless
- * of the user's actual rights - for example when we need to retrieve the
- * ntSecurityDescriptor */
- bool ignore_security;
- struct security_token *token;
- /*needed to identify if we have requested these attributes*/
- bool nTSecurityDescriptor;
- bool objectClass;
- int sec_result;
-};
+#include "dsdb/samdb/ldb_modules/util.h"
+#include "lib/util/tsort.h"
struct extended_access_check_attribute {
const char *oa_name;
const uint32_t requires_rights;
};
-struct acl_private{
- bool perform_check;
+struct acl_private {
+ bool acl_perform;
+ const char **password_attrs;
};
-static int acl_search_callback(struct ldb_request *req, struct ldb_reply *ares);
-
-/*FIXME: Perhaps this should go in the .idl file*/
-#define SEC_GENERIC_ACCESS_NEVER_GRANTED ( 0xFFFFFFFF )
-
-/*Contains a part of the attributes - the ones that have predefined required rights*/
-static const struct extended_access_check_attribute extended_access_checks_table[] =
-{
- {
- .oa_name = "nTSecurityDescriptor",
- .requires_rights = SEC_FLAG_SYSTEM_SECURITY & SEC_STD_READ_CONTROL,
- },
- {
- .oa_name = "pekList",
- .requires_rights = SEC_GENERIC_ACCESS_NEVER_GRANTED,
- },
- {
- .oa_name = "currentValue",
- .requires_rights = SEC_GENERIC_ACCESS_NEVER_GRANTED,
- },
- {
- .oa_name = "dBCSPwd",
- .requires_rights = SEC_GENERIC_ACCESS_NEVER_GRANTED,
- },
- {
- .oa_name = "unicodePwd",
- .requires_rights = SEC_GENERIC_ACCESS_NEVER_GRANTED,
- },
- {
- .oa_name = "ntPwdHistory",
- .requires_rights = SEC_GENERIC_ACCESS_NEVER_GRANTED,
- },
- {
- .oa_name = "priorValue",
- .requires_rights = SEC_GENERIC_ACCESS_NEVER_GRANTED,
- },
- {
- .oa_name = "supplementalCredentials",
- .requires_rights = SEC_GENERIC_ACCESS_NEVER_GRANTED,
- },
- {
- .oa_name = "trustAuthIncoming",
- .requires_rights = SEC_GENERIC_ACCESS_NEVER_GRANTED,
- },
- {
- .oa_name = "trustAuthOutgoing",
- .requires_rights = SEC_GENERIC_ACCESS_NEVER_GRANTED,
- },
- {
- .oa_name = "ImPwdHistory",
- .requires_rights = SEC_GENERIC_ACCESS_NEVER_GRANTED,
- },
- {
- .oa_name = "initialAuthIncoming",
- .requires_rights = SEC_GENERIC_ACCESS_NEVER_GRANTED,
- },
- {
- .oa_name = "initialAuthOutgoing",
- .requires_rights = SEC_GENERIC_ACCESS_NEVER_GRANTED,
- },
- {
- .oa_name = "msDS-ExecuteScriptPassword",
- .requires_rights = SEC_GENERIC_ACCESS_NEVER_GRANTED,
- },
+struct acl_context {
+ struct ldb_module *module;
+ struct ldb_request *req;
+ bool am_system;
+ bool allowedAttributes;
+ bool allowedAttributesEffective;
+ bool allowedChildClasses;
+ bool allowedChildClassesEffective;
+ bool sDRightsEffective;
+ const char * const *attrs;
+ struct dsdb_schema *schema;
};
-static NTSTATUS extended_access_check(const char *attribute_name, const int access_rights, uint32_t searchFlags)
+bool is_root_base_dn(struct ldb_context *ldb, struct ldb_dn *dn_to_check)
{
- int i = 0;
- if (access_rights == SEC_GENERIC_ACCESS_NEVER_GRANTED) {
- return NT_STATUS_ACCESS_DENIED;
- }
-
- /*Check if the attribute is in the table first*/
- for ( i = 0; extended_access_checks_table[i].oa_name; i++ ) {
- if (ldb_attr_cmp(extended_access_checks_table[i].oa_name, attribute_name) == 0) {
- if ((access_rights & extended_access_checks_table[i].requires_rights) == access_rights) {
- return NT_STATUS_OK;
- } else {
- return NT_STATUS_ACCESS_DENIED;
- }
- }
- }
+ int result;
+ struct ldb_dn *root_base_dn = ldb_get_root_basedn(ldb);
+ result = ldb_dn_compare(root_base_dn,dn_to_check);
+ return (result==0);
+}
- /*Check for attribute whose attributeSchema has 0x80 set in searchFlags*/
- if ((searchFlags & SEARCH_FLAG_CONFIDENTIAL) == SEARCH_FLAG_CONFIDENTIAL) {
- if (((SEC_ADS_READ_PROP & SEC_ADS_CONTROL_ACCESS) & access_rights) == access_rights) {
- return NT_STATUS_OK;
- } else {
- return NT_STATUS_ACCESS_DENIED;
- }
+static struct security_token *acl_user_token(struct ldb_module *module)
+{
+ struct ldb_context *ldb = ldb_module_get_ctx(module);
+ struct auth_session_info *session_info
+ = (struct auth_session_info *)ldb_get_opaque(ldb, "sessionInfo");
+ if(!session_info) {
+ return NULL;
}
+ return session_info->security_token;
+}
- /*Check attributes with *special* behaviour*/
- if (ldb_attr_cmp("msDS-QuotaEffective", attribute_name) == 0 || ldb_attr_cmp("msDS-QuotaUsed", attribute_name) == 0){
- /*Rights required:
- *
- *(RIGHT_DS_READ_PROPERTY on the Quotas container or
- *((the client is querying the quota for the security principal it is authenticated as) and
- *(DS-Query-Self-Quota control access right on the Quotas container))
- */
- }
+/* performs an access check from inside the module stack
+ * given the dn of the object to be checked, the required access
+ * guid is either the guid of the extended right, or NULL
+ */
- if (ldb_attr_cmp("userPassword", attribute_name) == 0) {
- /*When the dSHeuristics.fUserPwdSupport flag is false, the requester must be granted RIGHT_DS_READ_PROPERTY.
- *When the dSHeuristics.fUserPwdSupport flag is true, access is never granted.
- */
+int dsdb_module_check_access_on_dn(struct ldb_module *module,
+ TALLOC_CTX *mem_ctx,
+ struct ldb_dn *dn,
+ uint32_t access,
+ const struct GUID *guid)
+{
+ int ret;
+ struct ldb_result *acl_res;
+ static const char *acl_attrs[] = {
+ "nTSecurityDescriptor",
+ "objectSid",
+ NULL
+ };
+ struct ldb_context *ldb = ldb_module_get_ctx(module);
+ struct auth_session_info *session_info
+ = (struct auth_session_info *)ldb_get_opaque(ldb, "sessionInfo");
+ if(!session_info) {
+ return ldb_operr(ldb);
}
-
- if (ldb_attr_cmp("sDRightsEffective", attribute_name) == 0) {
- /*FIXME:3.1.1.4.5.4 in MS-ADTS*/
+ ret = dsdb_module_search_dn(module, mem_ctx, &acl_res, dn,
+ acl_attrs,
+ DSDB_FLAG_NEXT_MODULE |
+ DSDB_SEARCH_SHOW_DELETED);
+ if (ret != LDB_SUCCESS) {
+ DEBUG(10,("access_check: failed to find object %s\n", ldb_dn_get_linearized(dn)));
+ return ret;
}
+ return dsdb_check_access_on_dn_internal(ldb, acl_res,
+ mem_ctx,
+ session_info->security_token,
+ dn,
+ access,
+ guid);
+}
- if (ldb_attr_cmp("allowedChildClassesEffective", attribute_name) == 0) {
- /*FIXME:3.1.1.4.5.5 in MS-ADTS*/
- }
-
- if (ldb_attr_cmp("allowedAttributesEffective", attribute_name) == 0) {
- /*FIXME:3.1.1.4.5.7 in MS-ADTS*/
- }
-
- if (ldb_attr_cmp("msDS-Approx-Immed-Subordinates", attribute_name) == 0) {
- /*FIXME:3.1.1.4.5.15 in MS-ADTS*/
- }
-
- if (ldb_attr_cmp("msDS-QuotaEffective", attribute_name) == 0) {
- /*FIXME:3.1.1.4.5.22 in MS-ADTS*/
- }
-
- if (ldb_attr_cmp("msDS-ReplAttributeMetaData", attribute_name) == 0 || ldb_attr_cmp("msDS-ReplAttributeMetaData", attribute_name) == 0) {
- /*The security context of the requester must be granted the following rights on the replPropertyMetaData attribute:
- *(RIGHT_DS_READ_PROPERTY)or (DS-Replication-Manage-Topology by ON!nTSecurityDescriptor)
- */
- }
-
- if (ldb_attr_cmp("msDS-NCReplInboundNeighbors", attribute_name) == 0) {
- /*The security context of the requester must be granted the following rights on repsFrom:
- *(RIGHT_DS_READ_PROPERTY) or (DS-Replication-Manage-Topology) or (DS-Replication-Monitor-Topology)
- */
- }
-
- if (ldb_attr_cmp("msDS-NCReplOutboundNeighbors", attribute_name) == 0) {
- /*The security context of the requester must be granted the following rights on repsTo:
- *(RIGHT_DS_READ_PROPERTY) or (DS-Replication-Manage-Topology) or (DS-Replication-Monitor-Topology)
- */
- }
- if (ldb_attr_cmp("msDS-NCReplCursors", attribute_name) == 0) {
- /*The security context of the requester must be granted the following rights on replUpToDateVector: (RIGHT_DS_READ_PROPERTY)
- *or (DS-Replication-Manage-Topology) or (DS-Replication-Monitor-Topology)
- */
- }
+static int acl_module_init(struct ldb_module *module)
+{
+ struct ldb_context *ldb;
+ struct acl_private *data;
+ int ret, i;
+ TALLOC_CTX *mem_ctx;
+ static const char *attrs[] = { "passwordAttribute", NULL };
+ struct ldb_result *res;
+ struct ldb_message *msg;
+ struct ldb_message_element *password_attributes;
- if (ldb_attr_cmp("msDS-IsUserCachableAtRodc", attribute_name) == 0) {
- /*The security context of the requester must be granted
- *the DS-Replication-Secrets-Synchronize control access right on the root of the default NC.
- */
- }
+ ldb = ldb_module_get_ctx(module);
- return NT_STATUS_OK;
-}
+ ret = ldb_mod_register_control(module, LDB_CONTROL_SD_FLAGS_OID);
+ if (ret != LDB_SUCCESS) {
+ ldb_debug(ldb, LDB_DEBUG_ERROR,
+ "acl_module_init: Unable to register control with rootdse!\n");
+ return ldb_operr(ldb);
+ }
-/* Builds an object tree for object specific access checks */
-static struct object_tree * build_object_tree_form_attr_list(TALLOC_CTX *mem_ctx, /* Todo this context or separate? */
- struct ldb_context *ldb,
- const char ** attr_names,
- int num_attrs,
- const char * object_class,
- uint32_t init_access)
-{
- const struct dsdb_schema *schema = dsdb_get_schema(ldb);
- const struct GUID *oc_guid = class_schemaid_guid_by_lDAPDisplayName(schema, object_class);
- struct object_tree *tree;
- int i;
+ data = talloc(module, struct acl_private);
+ if (data == NULL) {
+ return ldb_oom(ldb);
+ }
- if (!oc_guid)
- return NULL;
+ data->password_attrs = NULL;
+ data->acl_perform = lp_parm_bool(ldb_get_opaque(ldb, "loadparm"),
+ NULL, "acl", "perform", false);
+ ldb_module_set_private(module, data);
- tree = insert_in_object_tree(mem_ctx, oc_guid, NULL, init_access, NULL);
- if (attr_names){
- for (i=0; i < num_attrs; i++){
- const struct dsdb_attribute *attribute = dsdb_attribute_by_lDAPDisplayName(schema,attr_names[i]);
- if (attribute)
- insert_in_object_tree(mem_ctx,
- &attribute->schemaIDGUID,
- &attribute->attributeSecurityGUID,
- init_access,
- tree);
- }
+ mem_ctx = talloc_new(module);
+ if (!mem_ctx) {
+ return ldb_oom(ldb);
}
- return tree;
-}
-bool is_root_base_dn(struct ldb_context *ldb, struct ldb_dn *dn_to_check)
-{
- int result;
- struct ldb_dn *root_base_dn = ldb_get_root_basedn(ldb);
- result = ldb_dn_compare(root_base_dn,dn_to_check);
- return (result==0);
-}
+ ret = dsdb_module_search_dn(module, mem_ctx, &res,
+ ldb_dn_new(mem_ctx, ldb, "@KLUDGEACL"),
+ attrs,
+ DSDB_FLAG_NEXT_MODULE);
+ if (ret != LDB_SUCCESS) {
+ goto done;
+ }
+ if (res->count == 0) {
+ goto done;
+ }
-static int acl_op_callback(struct ldb_request *req, struct ldb_reply *ares)
-{
- struct acl_context *ac;
+ if (res->count > 1) {
+ talloc_free(mem_ctx);
+ return LDB_ERR_CONSTRAINT_VIOLATION;
+ }
- ac = talloc_get_type(req->context, struct acl_context);
+ msg = res->msgs[0];
- if (!ares) {
- return ldb_module_done(ac->req, NULL, NULL,
- LDB_ERR_OPERATIONS_ERROR);
+ password_attributes = ldb_msg_find_element(msg, "passwordAttribute");
+ if (!password_attributes) {
+ goto done;
}
- if (ares->error != LDB_SUCCESS) {
- return ldb_module_done(ac->req, ares->controls,
- ares->response, ares->error);
+ data->password_attrs = talloc_array(data, const char *, password_attributes->num_values + 1);
+ if (!data->password_attrs) {
+ talloc_free(mem_ctx);
+ return ldb_oom(ldb);
}
-
- if (ares->type != LDB_REPLY_DONE) {
- talloc_free(ares);
- return ldb_module_done(ac->req, NULL, NULL,
- LDB_ERR_OPERATIONS_ERROR);
+ for (i=0; i < password_attributes->num_values; i++) {
+ data->password_attrs[i] = (const char *)password_attributes->values[i].data;
+ talloc_steal(data->password_attrs, password_attributes->values[i].data);
}
+ data->password_attrs[i] = NULL;
- return ldb_module_done(ac->req, ares->controls,
- ares->response, ares->error);
+done:
+ talloc_free(mem_ctx);
+ return ldb_next_init(module);
}
-
-static int acl_access_check_add(struct ldb_reply *ares,
- struct acl_context *ac,
- struct security_descriptor *sd)
+static const struct GUID *get_oc_guid_from_message(struct ldb_module *module,
+ const struct dsdb_schema *schema,
+ struct ldb_message *msg)
{
- uint32_t access_granted = 0;
- NTSTATUS status;
- struct ldb_dn *parent;
- struct ldb_dn *grandparent;
- struct object_tree *tree = NULL;
-
- parent = ldb_dn_get_parent(ac->req, ac->req->op.add.message->dn);
- grandparent = ldb_dn_get_parent(ac->req, parent);
- if (ldb_dn_compare(ares->message->dn, grandparent) == 0)
- status = sec_access_check_ds(sd, ac->token,
- SEC_ADS_LIST,
- &access_granted,
- NULL);
- else if (ldb_dn_compare(ares->message->dn, parent) == 0){
- struct ldb_message_element *oc_el;
- struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
- const struct dsdb_schema *schema = dsdb_get_schema(ldb);
- int i;
-
- oc_el = ldb_msg_find_element(ares->message, "objectClass");
- if (!oc_el || oc_el->num_values == 0)
- return LDB_SUCCESS;
- for (i = 0; i < oc_el->num_values; i++){
- const struct GUID *guid = class_schemaid_guid_by_lDAPDisplayName(schema,
- oc_el->values[i].data);
- ac->sec_result = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
- tree = insert_in_object_tree(ac->req, guid, NULL, SEC_ADS_CREATE_CHILD,
- tree);
- status = sec_access_check_ds(sd, ac->token, SEC_ADS_CREATE_CHILD,&access_granted, tree);
- if (NT_STATUS_IS_OK(status))
- ac->sec_result = LDB_SUCCESS;
- }
+ struct ldb_message_element *oc_el;
+
+ oc_el = ldb_msg_find_element(msg, "objectClass");
+ if (!oc_el) {
+ return NULL;
}
- else
- return LDB_SUCCESS;
- return ac->sec_result;
+ return class_schemaid_guid_by_lDAPDisplayName(schema,
+ (char *)oc_el->values[oc_el->num_values-1].data);
}
-static int acl_access_check_modify(struct ldb_reply *ares, struct acl_context *ac,
- struct security_descriptor *sd)
+static int acl_check_access_on_attribute(struct ldb_module *module,
+ TALLOC_CTX *mem_ctx,
+ struct security_descriptor *sd,
+ struct dom_sid *rp_sid,
+ uint32_t access,
+ const struct dsdb_attribute *attr)
{
- uint32_t access_granted = 0;
+ int ret;
NTSTATUS status;
- struct ldb_dn *parent;
- struct object_tree *tree = NULL;
-
- parent = ldb_dn_get_parent(ac->req, ac->req->op.add.message->dn);
- if (ldb_dn_compare(ares->message->dn, parent) == 0)
- status = sec_access_check_ds(sd, ac->token, SEC_ADS_LIST,&access_granted, NULL);
- else if (ldb_dn_compare(ares->message->dn, ac->req->op.add.message->dn) == 0){
- struct ldb_message_element *oc_el;
- struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
- const struct dsdb_schema *schema = dsdb_get_schema(ldb);
- int i;
- struct GUID *guid;
- oc_el = ldb_msg_find_element(ares->message, "objectClass");
- if (!oc_el || oc_el->num_values == 0)
- return LDB_SUCCESS;
+ uint32_t access_granted;
+ struct object_tree *root = NULL;
+ struct object_tree *new_node = NULL;
+ TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+ struct security_token *token = acl_user_token(module);
+ if (attr) {
+ if (!GUID_all_zero(&attr->attributeSecurityGUID)) {
+ if (!insert_in_object_tree(tmp_ctx,
+ &attr->attributeSecurityGUID, access,
+ &root, &new_node)) {
+ DEBUG(10, ("acl_search: cannot add to object tree securityGUID\n"));
+ goto fail;
+ }
- guid = class_schemaid_guid_by_lDAPDisplayName(schema,
- oc_el->values[oc_el->num_values-1].data);
- tree = insert_in_object_tree(ac->req, guid, NULL, SEC_ADS_WRITE_PROP,
- tree);
- for (i=0; i < ac->req->op.mod.message->num_elements; i++){
- const struct dsdb_attribute *attr = dsdb_attribute_by_lDAPDisplayName(schema,
- ac->req->op.mod.message->elements[i].name);
- if (!attr)
- return LDB_ERR_OPERATIONS_ERROR; /* What should we actually return here? */
- insert_in_object_tree(ac, &attr->schemaIDGUID,
- &attr->attributeSecurityGUID, ac->access_needed, tree);
+ if (!insert_in_object_tree(tmp_ctx,
+ &attr->schemaIDGUID, access, &new_node, &new_node)) {
+ DEBUG(10, ("acl_search: cannot add to object tree attributeGUID\n"));
+ goto fail;
+ }
+ }
+ else {
+ if (!insert_in_object_tree(tmp_ctx,
+ &attr->schemaIDGUID, access, &root, &new_node)) {
+ DEBUG(10, ("acl_search: cannot add to object tree attributeGUID\n"));
+ goto fail;
+ }
}
- status = sec_access_check_ds(sd, ac->token, SEC_ADS_WRITE_PROP ,&access_granted, tree);
- if (!NT_STATUS_IS_OK(status))
- ac->sec_result = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
}
- else
- return LDB_SUCCESS;
- return ac->sec_result;
-}
-/*TODO*/
-static int acl_access_check_rename(struct ldb_reply *ares, struct acl_context *ac,
- struct security_descriptor *sd)
-{
- return ac->sec_result;
+ status = sec_access_check_ds(sd, token,
+ access,
+ &access_granted,
+ root,
+ rp_sid);
+ if (!NT_STATUS_IS_OK(status)) {
+ ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
+ }
+ else {
+ ret = LDB_SUCCESS;
+ }
+ talloc_free(tmp_ctx);
+ return ret;
+fail:
+ talloc_free(tmp_ctx);
+ return ldb_operr(ldb_module_get_ctx(module));
}
-static int acl_access_check_delete(struct ldb_reply *ares, struct acl_context *ac,
- struct security_descriptor *sd)
+static int acl_check_access_on_class(struct ldb_module *module,
+ const struct dsdb_schema *schema,
+ TALLOC_CTX *mem_ctx,
+ struct security_descriptor *sd,
+ struct dom_sid *rp_sid,
+ uint32_t access,
+ const char *class_name)
{
- uint32_t access_granted = 0;
+ int ret;
NTSTATUS status;
- struct ldb_dn *parent;
- struct object_tree *tree = NULL;
-
- parent = ldb_dn_get_parent(ac->req, ac->req->op.del.dn);
- if (ldb_dn_compare(ares->message->dn, parent) == 0){
- status = sec_access_check_ds(sd, ac->token, SEC_ADS_LIST,&access_granted, NULL);
- if (!NT_STATUS_IS_OK(status)){
- ac->sec_result = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
- return ac->sec_result;
+ uint32_t access_granted;
+ struct object_tree *root = NULL;
+ struct object_tree *new_node = NULL;
+ const struct GUID *guid;
+ TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+ struct security_token *token = acl_user_token(module);
+ if (class_name) {
+ guid = class_schemaid_guid_by_lDAPDisplayName(schema, class_name);
+ if (!guid) {
+ DEBUG(10, ("acl_search: cannot find class %s\n",
+ class_name));
+ goto fail;
}
- status = sec_access_check_ds(sd, ac->token, SEC_ADS_DELETE_CHILD,&access_granted, NULL);
- if (NT_STATUS_IS_OK(status)){
- ac->sec_result = LDB_SUCCESS;
- return ac->sec_result;
+ if (!insert_in_object_tree(tmp_ctx,
+ guid, access,
+ &root, &new_node)) {
+ DEBUG(10, ("acl_search: cannot add to object tree guid\n"));
+ goto fail;
}
}
- else if (ldb_dn_compare(ares->message->dn, ac->req->op.del.dn) == 0){
- status = sec_access_check_ds(sd, ac->token, SEC_STD_DELETE, &access_granted, NULL);
- if (!NT_STATUS_IS_OK(status))
- ac->sec_result = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
+ status = sec_access_check_ds(sd, token,
+ access,
+ &access_granted,
+ root,
+ rp_sid);
+ if (!NT_STATUS_IS_OK(status)) {
+ ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
}
- return ac->sec_result;
+ else {
+ ret = LDB_SUCCESS;
+ }
+ return ret;
+fail:
+ return ldb_operr(ldb_module_get_ctx(module));
}
-static int acl_access_check_search(struct ldb_reply *ares, struct acl_context *ac,
- struct security_descriptor *sd)
+static int acl_allowedAttributes(struct ldb_module *module,
+ const struct dsdb_schema *schema,
+ struct ldb_message *sd_msg,
+ struct ldb_message *msg,
+ struct acl_context *ac)
{
- uint32_t access_granted;
- NTSTATUS status;
- struct ldb_dn *parent;
+ struct ldb_message_element *oc_el;
+ struct ldb_context *ldb = ldb_module_get_ctx(module);
+ TALLOC_CTX *mem_ctx;
+ const char **attr_list;
+ int i, ret;
- if (ac->user_type == SECURITY_SYSTEM || ac->user_type == SECURITY_ANONYMOUS) {
- return LDB_SUCCESS;/*FIXME: we have anonymous access*/
+ /* If we don't have a schema yet, we can't do anything... */
+ if (schema == NULL) {
+ ldb_asprintf_errstring(ldb, "cannot add allowedAttributes to %s because no schema is loaded", ldb_dn_get_linearized(msg->dn));
+ return LDB_ERR_OPERATIONS_ERROR;
}
- parent = ldb_dn_get_parent(ac->req, ac->dn_to_check);
- ac->sec_result = LDB_SUCCESS;
- if (ldb_dn_compare(ares->message->dn, parent) == 0) {
- status = sec_access_check_ds(sd, ac->token, SEC_ADS_LIST,&access_granted, NULL);
- if (!NT_STATUS_IS_OK(status)) {
- ac->sec_result = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
- }
+ /* Must remove any existing attribute */
+ if (ac->allowedAttributes) {
+ ldb_msg_remove_attr(msg, "allowedAttributes");
}
- return ac->sec_result;
-}
+ mem_ctx = talloc_new(msg);
+ if (!mem_ctx) {
+ return ldb_oom(ldb);
+ }
-static int acl_perform_access_check(struct ldb_request *req, struct ldb_reply *ares,
- struct acl_context *ac)
-{
- struct ldb_message_element *oc_el;
- struct security_descriptor *sd;
- enum ndr_err_code ndr_err;
+ oc_el = ldb_msg_find_element(sd_msg, "objectClass");
+ attr_list = dsdb_full_attribute_list(mem_ctx, schema, oc_el, DSDB_SCHEMA_ALL);
+ if (!attr_list) {
+ ldb_asprintf_errstring(ldb, "acl: Failed to get list of attributes");
+ talloc_free(mem_ctx);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+ if (ac->allowedAttributes) {
+ for (i=0; attr_list && attr_list[i]; i++) {
+ ldb_msg_add_string(msg, "allowedAttributes", attr_list[i]);
+ }
+ }
+ if (ac->allowedAttributesEffective) {
+ struct security_descriptor *sd;
+ struct dom_sid *sid = NULL;
+ struct ldb_control *as_system = ldb_request_get_control(ac->req,
+ LDB_CONTROL_AS_SYSTEM_OID);
+
+ if (as_system != NULL) {
+ as_system->critical = 0;
+ }
- oc_el = ldb_msg_find_element(ares->message, "ntSecurityDescriptor");
- if (!oc_el || oc_el->num_values == 0)
- return LDB_SUCCESS;
+ ldb_msg_remove_attr(msg, "allowedAttributesEffective");
+ if (ac->am_system || as_system) {
+ for (i=0; attr_list && attr_list[i]; i++) {
+ ldb_msg_add_string(msg, "allowedAttributesEffective", attr_list[i]);
+ }
+ return LDB_SUCCESS;
+ }
- sd = talloc(ac, struct security_descriptor);
- if(!sd) {
- return ldb_module_done(ac->req, ares->controls,
- ares->response, LDB_ERR_OPERATIONS_ERROR);
- }
- ndr_err = ndr_pull_struct_blob(&oc_el->values[0], sd, NULL, sd,
- (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
+ ret = dsdb_get_sd_from_ldb_message(ldb_module_get_ctx(module), mem_ctx, sd_msg, &sd);
- if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err))
- return ldb_module_done(ac->req, ares->controls,
- ares->response, LDB_ERR_OPERATIONS_ERROR);
- switch (ac->req->operation) {
- case LDB_SEARCH:
- return acl_access_check_search(ares, ac, sd);
- case LDB_ADD:
- return acl_access_check_add(ares, ac, sd);
- case LDB_MODIFY:
- return acl_access_check_modify(ares, ac, sd);
- case LDB_DELETE:
- return acl_access_check_delete(ares, ac, sd);
- case LDB_RENAME:
- return acl_access_check_rename(ares, ac, sd);
- default:
- return ldb_module_done(ac->req, ares->controls,
- ares->response, LDB_ERR_OPERATIONS_ERROR);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+
+ sid = samdb_result_dom_sid(mem_ctx, sd_msg, "objectSid");
+ for (i=0; attr_list && attr_list[i]; i++) {
+ const struct dsdb_attribute *attr = dsdb_attribute_by_lDAPDisplayName(schema,
+ attr_list[i]);
+ if (!attr) {
+ return ldb_operr(ldb);
+ }
+ /* remove constructed attributes */
+ if (attr->systemFlags & DS_FLAG_ATTR_IS_CONSTRUCTED
+ || attr->systemOnly
+ || (attr->linkID != 0 && attr->linkID % 2 != 0 )) {
+ continue;
+ }
+ ret = acl_check_access_on_attribute(module,
+ msg,
+ sd,
+ sid,
+ SEC_ADS_WRITE_PROP,
+ attr);
+ if (ret == LDB_SUCCESS) {
+ ldb_msg_add_string(msg, "allowedAttributesEffective", attr_list[i]);
+ }
+ }
}
return LDB_SUCCESS;
}
-static int acl_forward_add(struct ldb_reply *ares,
- struct acl_context *ac)
+static int acl_childClasses(struct ldb_module *module,
+ const struct dsdb_schema *schema,
+ struct ldb_message *sd_msg,
+ struct ldb_message *msg,
+ const char *attrName)
{
- struct ldb_request *newreq;
- struct ldb_context *ldb;
+ struct ldb_message_element *oc_el;
+ struct ldb_message_element *allowedClasses;
+ const struct dsdb_class *sclass;
+ unsigned int i, j;
int ret;
- ldb = ldb_module_get_ctx(ac->module);
- ret = ldb_build_add_req(&newreq,ldb,
- ac,
- ac->req->op.add.message,
- ac->req->controls,
- ac,
- acl_op_callback,
- ac->req);
- if (ret != LDB_SUCCESS)
- return ldb_module_done(ac->req, ares->controls,
- ares->response, LDB_ERR_OPERATIONS_ERROR);
- return ldb_next_request(ac->module, newreq);
-}
+ /* If we don't have a schema yet, we can't do anything... */
+ if (schema == NULL) {
+ ldb_asprintf_errstring(ldb_module_get_ctx(module), "cannot add childClassesEffective to %s because no schema is loaded", ldb_dn_get_linearized(msg->dn));
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
-static int acl_forward_modify(struct ldb_reply *ares,
- struct acl_context *ac)
-{
- struct ldb_request *newreq;
- struct ldb_context *ldb;
- int ret;
+ /* Must remove any existing attribute, or else confusion reins */
+ ldb_msg_remove_attr(msg, attrName);
+ ret = ldb_msg_add_empty(msg, attrName, 0, &allowedClasses);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
- ldb = ldb_module_get_ctx(ac->module);
- ret = ldb_build_mod_req(&newreq,ldb,
- ac,
- ac->req->op.mod.message,
- ac->req->controls,
- ac,
- acl_op_callback,
- ac->req);
- if (ret != LDB_SUCCESS)
- return ldb_module_done(ac->req, ares->controls,
- ares->response, LDB_ERR_OPERATIONS_ERROR);
- return ldb_next_request(ac->module, newreq);
-}
+ oc_el = ldb_msg_find_element(sd_msg, "objectClass");
-static int acl_forward_delete(struct ldb_reply *ares,
- struct acl_context *ac)
-{
- struct ldb_request *newreq;
- struct ldb_context *ldb;
- int ret;
+ for (i=0; oc_el && i < oc_el->num_values; i++) {
+ sclass = dsdb_class_by_lDAPDisplayName_ldb_val(schema, &oc_el->values[i]);
+ if (!sclass) {
+ /* We don't know this class? what is going on? */
+ continue;
+ }
- ldb = ldb_module_get_ctx(ac->module);
- ret = ldb_build_del_req(&newreq, ldb,
- ac,
- ac->req->op.del.dn,
- ac->req->controls,
- ac,
- acl_op_callback,
- ac->req);
- if (ret != LDB_SUCCESS)
- return ldb_module_done(ac->req, ares->controls,
- ares->response, LDB_ERR_OPERATIONS_ERROR);
- return ldb_next_request(ac->module, newreq);
-}
+ for (j=0; sclass->possibleInferiors && sclass->possibleInferiors[j]; j++) {
+ ldb_msg_add_string(msg, attrName, sclass->possibleInferiors[j]);
+ }
+ }
+ if (allowedClasses->num_values > 1) {
+ TYPESAFE_QSORT(allowedClasses->values, allowedClasses->num_values, data_blob_cmp);
+ for (i=1 ; i < allowedClasses->num_values; i++) {
+ struct ldb_val *val1 = &allowedClasses->values[i-1];
+ struct ldb_val *val2 = &allowedClasses->values[i];
+ if (data_blob_cmp(val1, val2) == 0) {
+ memmove(val1, val2, (allowedClasses->num_values - i) * sizeof(struct ldb_val));
+ allowedClasses->num_values--;
+ i--;
+ }
+ }
+ }
-static int acl_forward_rename(struct ldb_reply *ares,
- struct acl_context *ac)
-{
return LDB_SUCCESS;
}
-static int acl_forward_search(struct acl_context *ac)
+static int acl_childClassesEffective(struct ldb_module *module,
+ const struct dsdb_schema *schema,
+ struct ldb_message *sd_msg,
+ struct ldb_message *msg,
+ struct acl_context *ac)
{
+ struct ldb_message_element *oc_el;
+ struct ldb_message_element *allowedClasses = NULL;
+ const struct dsdb_class *sclass;
+ struct security_descriptor *sd;
+ struct ldb_control *as_system = ldb_request_get_control(ac->req,
+ LDB_CONTROL_AS_SYSTEM_OID);
+ struct dom_sid *sid = NULL;
+ unsigned int i, j;
int ret;
- const char * const *attrs;
- struct ldb_control *sd_control;
- struct ldb_control **sd_saved_controls;
- struct ldb_context *ldb;
- struct ldb_request *newreq;
- ldb = ldb_module_get_ctx(ac->module);
- attrs = ac->req->op.search.attrs;
- if (attrs) {
- ac->nTSecurityDescriptor = false;
- ac->objectClass = false;
- if (!ldb_attr_in_list(ac->req->op.search.attrs, "nTSecurityDescriptor")) {
- attrs = ldb_attr_list_copy_add(ac, attrs, "nTSecurityDescriptor");
- ac->nTSecurityDescriptor = true;
- }
- if (!ldb_attr_in_list(ac->req->op.search.attrs, "objectClass")) {
- attrs = ldb_attr_list_copy_add(ac, attrs, "objectClass");
- ac->objectClass = true;
- }
+ if (as_system != NULL) {
+ as_system->critical = 0;
}
- ret = ldb_build_search_req_ex(&newreq,ldb,
- ac,
- ac->req->op.search.base,
- ac->req->op.search.scope,
- ac->req->op.search.tree,
- attrs,
- ac->req->controls,
- ac, acl_search_callback,
- ac->req);
+
+ if (ac->am_system || as_system) {
+ return acl_childClasses(module, schema, sd_msg, msg, "allowedChildClassesEffective");
+ }
+
+ /* If we don't have a schema yet, we can't do anything... */
+ if (schema == NULL) {
+ ldb_asprintf_errstring(ldb_module_get_ctx(module), "cannot add allowedChildClassesEffective to %s because no schema is loaded", ldb_dn_get_linearized(msg->dn));
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ /* Must remove any existing attribute, or else confusion reins */
+ ldb_msg_remove_attr(msg, "allowedChildClassesEffective");
+
+ oc_el = ldb_msg_find_element(sd_msg, "objectClass");
+ ret = dsdb_get_sd_from_ldb_message(ldb_module_get_ctx(module), msg, sd_msg, &sd);
if (ret != LDB_SUCCESS) {
- return LDB_ERR_OPERATIONS_ERROR;
- }
- /* check if there's an SD_FLAGS control */
- sd_control = ldb_request_get_control(newreq, LDB_CONTROL_SD_FLAGS_OID);
- if (sd_control) {
- /* save it locally and remove it from the list */
- /* we do not need to replace them later as we
- * are keeping the original req intact */
- if (!save_controls(sd_control, newreq, &sd_saved_controls)) {
- return LDB_ERR_OPERATIONS_ERROR;
+ return ret;
+ }
+
+ sid = samdb_result_dom_sid(msg, sd_msg, "objectSid");
+ for (i=0; oc_el && i < oc_el->num_values; i++) {
+ sclass = dsdb_class_by_lDAPDisplayName_ldb_val(schema, &oc_el->values[i]);
+ if (!sclass) {
+ /* We don't know this class? what is going on? */
+ continue;
+ }
+
+ for (j=0; sclass->possibleInferiors && sclass->possibleInferiors[j]; j++) {
+ ret = acl_check_access_on_class(module,
+ schema,
+ msg,
+ sd,
+ sid,
+ SEC_ADS_CREATE_CHILD,
+ sclass->possibleInferiors[j]);
+ if (ret == LDB_SUCCESS) {
+ ldb_msg_add_string(msg, "allowedChildClassesEffective",
+ sclass->possibleInferiors[j]);
+ }
}
}
- return ldb_next_request(ac->module, newreq);
-}
+ allowedClasses = ldb_msg_find_element(msg, "allowedChildClassesEffective");
+ if (!allowedClasses) {
+ return LDB_SUCCESS;
+ }
-static int acl_forward_request(struct ldb_reply *ares,
- struct acl_context *ac)
-{
- switch (ac->req->operation) {
- case LDB_SEARCH:
- return acl_forward_search(ac);
- case LDB_ADD:
- return acl_forward_add(ares,ac);
- case LDB_MODIFY:
- return acl_forward_modify(ares,ac);
- case LDB_DELETE:
- return acl_forward_delete(ares,ac);
- case LDB_RENAME:
- return acl_forward_rename(ares,ac);
- default:
- return ldb_module_done(ac->req, ares->controls,
- ares->response, LDB_ERR_OPERATIONS_ERROR);
+ if (allowedClasses->num_values > 1) {
+ TYPESAFE_QSORT(allowedClasses->values, allowedClasses->num_values, data_blob_cmp);
+ for (i=1 ; i < allowedClasses->num_values; i++) {
+ struct ldb_val *val1 = &allowedClasses->values[i-1];
+ struct ldb_val *val2 = &allowedClasses->values[i];
+ if (data_blob_cmp(val1, val2) == 0) {
+ memmove(val1, val2, (allowedClasses->num_values - i) * sizeof( struct ldb_val));
+ allowedClasses->num_values--;
+ i--;
+ }
+ }
}
return LDB_SUCCESS;
}
-static int acl_visible_callback(struct ldb_request *req, struct ldb_reply *ares)
+static int acl_sDRightsEffective(struct ldb_module *module,
+ struct ldb_message *sd_msg,
+ struct ldb_message *msg,
+ struct acl_context *ac)
{
- struct acl_context *ac;
-
- ac = talloc_get_type(req->context, struct acl_context);
+ struct ldb_message_element *rightsEffective;
+ int ret;
+ struct security_descriptor *sd;
+ struct ldb_control *as_system = ldb_request_get_control(ac->req,
+ LDB_CONTROL_AS_SYSTEM_OID);
+ struct dom_sid *sid = NULL;
+ uint32_t flags = 0;
- if (!ares) {
- return ldb_module_done(ac->req, NULL, NULL,
- LDB_ERR_OPERATIONS_ERROR);
+ if (as_system != NULL) {
+ as_system->critical = 0;
}
- if (ares->error != LDB_SUCCESS) {
- return ldb_module_done(ac->req, ares->controls,
- ares->response, ares->error);
+ /* Must remove any existing attribute, or else confusion reins */
+ ldb_msg_remove_attr(msg, "sDRightsEffective");
+ ret = ldb_msg_add_empty(msg, "sDRightsEffective", 0, &rightsEffective);
+ if (ret != LDB_SUCCESS) {
+ return ret;
}
-
- switch (ares->type) {
- case LDB_REPLY_ENTRY:
- return acl_perform_access_check(req, ares, ac);
- case LDB_REPLY_REFERRAL:
- return ldb_module_send_referral(ac->req, ares->referral); /* what to do here actually? */
- case LDB_REPLY_DONE:
- if (ac->sec_result != LDB_SUCCESS) {
- return ldb_module_done(ac->req, ares->controls,
- ares->response, ac->sec_result);
+ if (ac->am_system || as_system) {
+ flags = SECINFO_OWNER | SECINFO_GROUP | SECINFO_SACL | SECINFO_DACL;
+ }
+ else {
+ /* Get the security descriptor from the message */
+ ret = dsdb_get_sd_from_ldb_message(ldb_module_get_ctx(module), msg, sd_msg, &sd);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+ sid = samdb_result_dom_sid(msg, sd_msg, "objectSid");
+ ret = acl_check_access_on_attribute(module,
+ msg,
+ sd,
+ sid,
+ SEC_STD_WRITE_OWNER,
+ NULL);
+ if (ret == LDB_SUCCESS) {
+ flags |= SECINFO_OWNER | SECINFO_GROUP;
+ }
+ ret = acl_check_access_on_attribute(module,
+ msg,
+ sd,
+ sid,
+ SEC_STD_WRITE_DAC,
+ NULL);
+ if (ret == LDB_SUCCESS) {
+ flags |= SECINFO_DACL;
+ }
+ ret = acl_check_access_on_attribute(module,
+ msg,
+ sd,
+ sid,
+ SEC_FLAG_SYSTEM_SECURITY,
+ NULL);
+ if (ret == LDB_SUCCESS) {
+ flags |= SECINFO_SACL;
}
- return acl_forward_request(ares,ac);
- default:
- break;
}
+ ldb_msg_add_fmt(msg, "sDRightsEffective", "%u", flags);
return LDB_SUCCESS;
}
-static enum security_user_level what_is_user(struct ldb_module *module)
+static int acl_add(struct ldb_module *module, struct ldb_request *req)
{
- struct ldb_context *ldb = ldb_module_get_ctx(module);
- struct auth_session_info *session_info
- = (struct auth_session_info *)ldb_get_opaque(ldb, "sessionInfo");
- return security_session_user_level(session_info);
-}
+ int ret;
+ struct ldb_dn *parent = ldb_dn_get_parent(req, req->op.add.message->dn);
+ struct ldb_context *ldb;
+ const struct dsdb_schema *schema;
+ struct ldb_message_element *oc_el;
+ const struct GUID *guid;
+ struct ldb_control *as_system = ldb_request_get_control(req, LDB_CONTROL_AS_SYSTEM_OID);
-static struct security_token * user_token(struct ldb_module *module)
-{
- struct ldb_context *ldb = ldb_module_get_ctx(module);
- struct auth_session_info *session_info
- = (struct auth_session_info *)ldb_get_opaque(ldb, "sessionInfo");
- if(!session_info) {
- return NULL;
+ if (as_system != NULL) {
+ as_system->critical = 0;
+ }
+
+ if (dsdb_module_am_system(module) || as_system) {
+ return ldb_next_request(module, req);
+ }
+
+ if (ldb_dn_is_special(req->op.add.message->dn)) {
+ return ldb_next_request(module, req);
+ }
+ ldb = ldb_module_get_ctx(module);
+ /* Creating an NC. There is probably something we should do here,
+ * but we will establish that later */
+ /* FIXME: this has to be made dynamic at some point */
+ if ((ldb_dn_compare(req->op.add.message->dn, (ldb_get_schema_basedn(ldb))) == 0) ||
+ (ldb_dn_compare(req->op.add.message->dn, (ldb_get_config_basedn(ldb))) == 0) ||
+ (ldb_dn_compare(req->op.add.message->dn, (ldb_get_default_basedn(ldb))) == 0) ||
+ (ldb_dn_compare(req->op.add.message->dn, (ldb_get_root_basedn(ldb))) == 0)) {
+ return ldb_next_request(module, req);
+ }
+
+ schema = dsdb_get_schema(ldb, req);
+ if (!schema) {
+ return ldb_operr(ldb);
+ }
+
+ oc_el = ldb_msg_find_element(req->op.add.message, "objectClass");
+ if (!oc_el || oc_el->num_values == 0) {
+ DEBUG(10,("acl:operation error %s\n", ldb_dn_get_linearized(req->op.add.message->dn)));
+ return ldb_module_done(req, NULL, NULL, LDB_ERR_OPERATIONS_ERROR);
}
- return session_info->security_token;
-}
+ guid = class_schemaid_guid_by_lDAPDisplayName(schema,
+ (char *)oc_el->values[oc_el->num_values-1].data);
+ ret = dsdb_module_check_access_on_dn(module, req, parent, SEC_ADS_CREATE_CHILD, guid);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+ return ldb_next_request(module, req);
+}
-static int make_req_access_check(struct ldb_module *module, struct ldb_request *req,
- struct acl_context *ac, const char *filter)
+/* checks for validated writes */
+static int acl_check_extended_right(TALLOC_CTX *mem_ctx,
+ struct security_descriptor *sd,
+ struct security_token *token,
+ const char *ext_right,
+ uint32_t right_type,
+ struct dom_sid *sid)
{
- struct ldb_context *ldb;
- int ret;
- const char **attrs = talloc_array(ac, const char *, 3);
- struct ldb_parse_tree *tree = ldb_parse_tree(req, filter);
+ struct GUID right;
+ NTSTATUS status;
+ uint32_t access_granted;
+ struct object_tree *root = NULL;
+ struct object_tree *new_node = NULL;
+ TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
- attrs[0] = talloc_strdup(attrs, "ntSecurityDescriptor");
- attrs[1] = talloc_strdup(attrs, "objectClass");
- attrs[2] = NULL;
+ GUID_from_string(ext_right, &right);
- ldb = ldb_module_get_ctx(module);
- ret = ldb_build_search_req_ex(&ac->down_req,
- ldb, ac,
- ac->dn_to_check,
- LDB_SCOPE_SUBTREE,
- tree,
- attrs,
- NULL,
- ac, acl_visible_callback,
- req);
- return ret;
+ if (!insert_in_object_tree(tmp_ctx, &right, right_type,
+ &root, &new_node)) {
+ DEBUG(10, ("acl_ext_right: cannot add to object tree\n"));
+ talloc_free(tmp_ctx);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+ status = sec_access_check_ds(sd, token,
+ right_type,
+ &access_granted,
+ root,
+ sid);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(tmp_ctx);
+ return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
+ }
+ talloc_free(tmp_ctx);
+ return LDB_SUCCESS;
}
-static const char *user_name(TALLOC_CTX *mem_ctx, struct ldb_module *module)
+
+/* ckecks if modifications are allowed on "Member" attribute */
+static int acl_check_self_membership(TALLOC_CTX *mem_ctx,
+ struct ldb_module *module,
+ struct ldb_request *req,
+ struct security_descriptor *sd,
+ struct dom_sid *sid,
+ const struct GUID *oc_guid,
+ const struct dsdb_attribute *attr)
{
+ int ret;
+ unsigned int i;
struct ldb_context *ldb = ldb_module_get_ctx(module);
- struct auth_session_info *session_info
- = (struct auth_session_info *)ldb_get_opaque(ldb, "sessionInfo");
- if (!session_info) {
- return "UNKNOWN (NULL)";
+ struct ldb_dn *user_dn;
+ struct ldb_message_element *member_el;
+ /* if we have wp, we can do whatever we like */
+ if (acl_check_access_on_attribute(module,
+ mem_ctx,
+ sd,
+ sid,
+ SEC_ADS_WRITE_PROP,
+ attr) == LDB_SUCCESS) {
+ return LDB_SUCCESS;
}
-
- return talloc_asprintf(mem_ctx, "%s\\%s",
- session_info->server_info->domain_name,
- session_info->server_info->account_name);
+ /* if we are adding/deleting ourselves, check for self membership */
+ ret = dsdb_find_dn_by_sid(ldb, mem_ctx, acl_user_token(module)->user_sid, &user_dn);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+ member_el = ldb_msg_find_element(req->op.mod.message, "member");
+ if (!member_el) {
+ return ldb_operr(ldb);
+ }
+ /* user can only remove oneself */
+ if (member_el->num_values == 0) {
+ return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
+ }
+ for (i = 0; i < member_el->num_values; i++) {
+ if (strcasecmp((const char *)member_el->values[i].data,
+ ldb_dn_get_extended_linearized(mem_ctx, user_dn, 1)) != 0) {
+ return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
+ }
+ }
+ ret = acl_check_extended_right(mem_ctx, sd, acl_user_token(module),
+ GUID_DRS_SELF_MEMBERSHIP,
+ SEC_ADS_SELF_WRITE,
+ sid);
+ if (ret == LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS) {
+ dsdb_acl_debug(sd, acl_user_token(module),
+ req->op.mod.message->dn,
+ true,
+ 10);
+ }
+ return ret;
}
-static int acl_module_init(struct ldb_module *module)
+static int acl_check_password_rights(TALLOC_CTX *mem_ctx,
+ struct ldb_module *module,
+ struct ldb_request *req,
+ struct security_descriptor *sd,
+ struct dom_sid *sid,
+ const struct GUID *oc_guid)
{
- struct ldb_context *ldb;
- struct acl_private *data;
- int ret;
-
- ldb = ldb_module_get_ctx(module);
-
- ret = ldb_mod_register_control(module, LDB_CONTROL_SD_FLAGS_OID);
+ int ret = LDB_SUCCESS;
+ unsigned int del_attr_cnt = 0, add_attr_cnt = 0, rep_attr_cnt = 0;
+ struct ldb_message_element *el;
+ struct ldb_message *msg;
+ const char *passwordAttrs[] = { "userPassword", "unicodePwd",
+ "clearTextPassword", NULL }, **l;
+ TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+
+ msg = ldb_msg_copy_shallow(tmp_ctx, req->op.mod.message);
+ if (msg == NULL) {
+ return ldb_module_oom(module);
+ }
+ for (l = passwordAttrs; *l != NULL; l++) {
+ while ((el = ldb_msg_find_element(msg, *l)) != NULL) {
+ if (el->flags == LDB_FLAG_MOD_DELETE) {
+ ++del_attr_cnt;
+ }
+ if (el->flags == LDB_FLAG_MOD_ADD) {
+ ++add_attr_cnt;
+ }
+ if (el->flags == LDB_FLAG_MOD_REPLACE) {
+ ++rep_attr_cnt;
+ }
+ ldb_msg_remove_element(msg, el);
+ }
+ }
+ /* a single delete will be handled by password hash
+ later in the stack, so we let it though here */
+ if (del_attr_cnt > 0 && add_attr_cnt == 0) {
+ talloc_free(tmp_ctx);
+ return LDB_SUCCESS;
+ }
+ if (rep_attr_cnt > 0 || (add_attr_cnt != del_attr_cnt)) {
+ ret = acl_check_extended_right(tmp_ctx, sd, acl_user_token(module),
+ GUID_DRS_FORCE_CHANGE_PASSWORD,
+ SEC_ADS_CONTROL_ACCESS,
+ sid);
+ }
+ else if (add_attr_cnt == 1 && del_attr_cnt == 1) {
+ ret = acl_check_extended_right(tmp_ctx, sd, acl_user_token(module),
+ GUID_DRS_USER_CHANGE_PASSWORD,
+ SEC_ADS_CONTROL_ACCESS,
+ sid);
+ /* Very strange, but we get constraint violation in this case */
+ if (ret == LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS) {
+ ret = LDB_ERR_CONSTRAINT_VIOLATION;
+ }
+ }
if (ret != LDB_SUCCESS) {
- ldb_debug(ldb, LDB_DEBUG_ERROR,
- "acl_module_init: Unable to register control with rootdse!\n");
- return LDB_ERR_OPERATIONS_ERROR;
+ dsdb_acl_debug(sd, acl_user_token(module),
+ req->op.mod.message->dn,
+ true,
+ 10);
}
-
- data = talloc(module, struct acl_private);
- data->perform_check = lp_parm_bool(ldb_get_opaque(ldb, "loadparm"),
- NULL, "acl", "perform", false);
- ldb_module_set_private(module, data);
-
- return ldb_next_init(module);
+ talloc_free(tmp_ctx);
+ return ret;
}
-static int acl_add(struct ldb_module *module, struct ldb_request *req)
+static int acl_modify(struct ldb_module *module, struct ldb_request *req)
{
int ret;
- struct acl_context *ac;
- struct ldb_dn * parent = ldb_dn_get_parent(req, req->op.add.message->dn);
- char * filter;
- struct ldb_context *ldb;
- struct acl_private *data;
-
- ldb = ldb_module_get_ctx(module);
- data = talloc_get_type(ldb_module_get_private(module), struct acl_private);
+ struct ldb_context *ldb = ldb_module_get_ctx(module);
+ const struct dsdb_schema *schema;
+ unsigned int i;
+ const struct GUID *guid;
+ uint32_t access_granted;
+ struct object_tree *root = NULL;
+ struct object_tree *new_node = NULL;
+ NTSTATUS status;
+ struct ldb_result *acl_res;
+ struct security_descriptor *sd;
+ struct dom_sid *sid = NULL;
+ struct ldb_control *as_system = ldb_request_get_control(req, LDB_CONTROL_AS_SYSTEM_OID);
+ TALLOC_CTX *tmp_ctx = talloc_new(req);
+ static const char *acl_attrs[] = {
+ "nTSecurityDescriptor",
+ "objectClass",
+ "objectSid",
+ NULL
+ };
+
+ if (as_system != NULL) {
+ as_system->critical = 0;
+ }
- if (!data->perform_check)
+ /* Don't print this debug statement if elements[0].name is going to be NULL */
+ if(req->op.mod.message->num_elements > 0)
+ {
+ DEBUG(10, ("ldb:acl_modify: %s\n", req->op.mod.message->elements[0].name));
+ }
+ if (dsdb_module_am_system(module) || as_system) {
return ldb_next_request(module, req);
-
- ac = talloc(req, struct acl_context);
- if (ac == NULL) {
- return LDB_ERR_OPERATIONS_ERROR;
}
-
- if (what_is_user(module) == SECURITY_SYSTEM)
+ if (ldb_dn_is_special(req->op.mod.message->dn)) {
return ldb_next_request(module, req);
+ }
+ ret = dsdb_module_search_dn(module, tmp_ctx, &acl_res, req->op.mod.message->dn,
+ acl_attrs,
+ DSDB_FLAG_NEXT_MODULE);
- ac->module = module;
- ac->req = req;
- ac->ignore_security = true;
- ac->dn_to_check = ldb_dn_get_parent(req, parent);
- ac->token = user_token(module);
- ac->user_type = what_is_user(module);
- ac->sec_result = LDB_SUCCESS;
- if (!is_root_base_dn(ldb, req->op.add.message->dn) && parent && !is_root_base_dn(ldb, parent)){
- filter = talloc_asprintf(req,"(&(objectClass=*)(|(%s=%s)(%s=%s))))",
- ldb_dn_get_component_name(parent,0),
- ldb_dn_get_component_val(parent,0)->data,
- ldb_dn_get_component_name(ac->dn_to_check,0),
- ldb_dn_get_component_val(ac->dn_to_check,0)->data);
-
- ret = make_req_access_check(module, req, ac, filter);
- if (ret != LDB_SUCCESS){
- return ret;
- }
- return ldb_next_request(module, ac->down_req);
+ if (ret != LDB_SUCCESS) {
+ goto fail;
}
- return ldb_next_request(module, req);
-}
-static int acl_modify(struct ldb_module *module, struct ldb_request *req)
-{
- int ret;
- struct acl_context *ac;
- struct ldb_dn * parent = ldb_dn_get_parent(req, req->op.mod.message->dn);
- char * filter;
- struct ldb_context *ldb;
- struct acl_private *data;
+ schema = dsdb_get_schema(ldb, tmp_ctx);
+ if (!schema) {
+ ret = LDB_ERR_OPERATIONS_ERROR;
+ goto fail;
+ }
- ldb = ldb_module_get_ctx(module);
- data = talloc_get_type(ldb_module_get_private(module), struct acl_private);
+ ret = dsdb_get_sd_from_ldb_message(ldb, tmp_ctx, acl_res->msgs[0], &sd);
+ if (ret != LDB_SUCCESS) {
+ DEBUG(10, ("acl_modify: cannot get descriptor\n"));
+ goto fail;
+ }
+ /* Theoretically we pass the check if the object has no sd */
+ if (!sd) {
+ goto success;
+ }
- if (!data->perform_check)
- return ldb_next_request(module, req);
+ guid = get_oc_guid_from_message(module, schema, acl_res->msgs[0]);
+ if (!guid) {
+ DEBUG(10, ("acl_modify: cannot get guid\n"));
+ goto fail;
+ }
+ sid = samdb_result_dom_sid(req, acl_res->msgs[0], "objectSid");
+ if (!insert_in_object_tree(tmp_ctx, guid, SEC_ADS_WRITE_PROP,
+ &root, &new_node)) {
+ DEBUG(10, ("acl_modify: cannot add to object tree\n"));
+ goto fail;
+ }
+ for (i=0; i < req->op.mod.message->num_elements; i++){
+ const struct dsdb_attribute *attr;
+ attr = dsdb_attribute_by_lDAPDisplayName(schema,
+ req->op.mod.message->elements[i].name);
+
+ if (ldb_attr_cmp("nTSecurityDescriptor", req->op.mod.message->elements[i].name) == 0) {
+ status = sec_access_check_ds(sd, acl_user_token(module),
+ SEC_STD_WRITE_DAC,
+ &access_granted,
+ NULL,
+ sid);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10, ("Object %s has no write dacl access\n",
+ ldb_dn_get_linearized(req->op.mod.message->dn)));
+ dsdb_acl_debug(sd,
+ acl_user_token(module),
+ req->op.mod.message->dn,
+ true,
+ 10);
+ ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
+ goto fail;
+ }
+ }
+ else if (ldb_attr_cmp("member", req->op.mod.message->elements[i].name) == 0) {
+ ret = acl_check_self_membership(tmp_ctx,
+ module,
+ req,
+ sd,
+ sid,
+ guid,
+ attr);
+ if (ret != LDB_SUCCESS) {
+ goto fail;
+ }
+ }
+ else if (ldb_attr_cmp("dBCSPwd", req->op.mod.message->elements[i].name) == 0) {
+ /* this one is not affected by any rights, we should let it through
+ so that passwords_hash returns the correct error */
+ continue;
+ }
+ else if (ldb_attr_cmp("unicodePwd", req->op.mod.message->elements[i].name) == 0 ||
+ ldb_attr_cmp("userPassword", req->op.mod.message->elements[i].name) == 0 ||
+ ldb_attr_cmp("clearTextPassword", req->op.mod.message->elements[i].name) == 0) {
+ ret = acl_check_password_rights(tmp_ctx,
+ module,
+ req,
+ sd,
+ sid,
+ guid);
+ if (ret != LDB_SUCCESS) {
+ goto fail;
+ }
+ } else {
- ac = talloc(req, struct acl_context);
- if (ac == NULL) {
- return LDB_ERR_OPERATIONS_ERROR;
+ /* This basic attribute existence check with the right errorcode
+ * is needed since this module is the first one which requests
+ * schema attribute informations.
+ * The complete attribute checking is done in the
+ * "objectclass_attrs" module behind this one.
+ */
+ if (!attr) {
+ ldb_asprintf_errstring(ldb, "acl_modify: attribute '%s' on entry '%s' was not found in the schema!",
+ req->op.mod.message->elements[i].name,
+ ldb_dn_get_linearized(req->op.mod.message->dn));
+ ret = LDB_ERR_NO_SUCH_ATTRIBUTE;
+ goto fail;
+ }
+ if (!insert_in_object_tree(tmp_ctx,
+ &attr->attributeSecurityGUID, SEC_ADS_WRITE_PROP,
+ &new_node, &new_node)) {
+ DEBUG(10, ("acl_modify: cannot add to object tree securityGUID\n"));
+ ret = LDB_ERR_OPERATIONS_ERROR;
+ goto fail;
+ }
+
+ if (!insert_in_object_tree(tmp_ctx,
+ &attr->schemaIDGUID, SEC_ADS_WRITE_PROP, &new_node, &new_node)) {
+ DEBUG(10, ("acl_modify: cannot add to object tree attributeGUID\n"));
+ ret = LDB_ERR_OPERATIONS_ERROR;
+ goto fail;
+ }
+ }
}
-/* TODO Is this really right? */
-/* if (what_is_user(module) == SECURITY_SYSTEM) */
- return ldb_next_request(module, req);
+ if (root->num_of_children > 0) {
+ status = sec_access_check_ds(sd, acl_user_token(module),
+ SEC_ADS_WRITE_PROP,
+ &access_granted,
+ root,
+ sid);
- ac->module = module;
- ac->req = req;
- ac->ignore_security = true;
- ac->dn_to_check = req->op.mod.message->dn;
- ac->token = user_token(module);
- ac->user_type = what_is_user(module);
- ac->sec_result = LDB_SUCCESS;
- if (!is_root_base_dn(ldb, req->op.mod.message->dn) && parent && !is_root_base_dn(ldb, parent)){
- filter = talloc_asprintf(req,"(&(objectClass=*)(|(%s=%s)(%s=%s))))",
- ldb_dn_get_component_name(parent,0),
- ldb_dn_get_component_val(parent,0)->data,
- ldb_dn_get_component_name(req->op.mod.message->dn,0),
- ldb_dn_get_component_val(req->op.mod.message->dn,0)->data);
-
- ret = make_req_access_check(module, req, ac, filter);
- if (ret != LDB_SUCCESS){
- return ret;
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10, ("Object %s has no write property access\n",
+ ldb_dn_get_linearized(req->op.mod.message->dn)));
+ dsdb_acl_debug(sd,
+ acl_user_token(module),
+ req->op.mod.message->dn,
+ true,
+ 10);
+ ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
+ goto fail;
}
- return ldb_next_request(module, ac->down_req);
}
+
+success:
+ talloc_free(tmp_ctx);
return ldb_next_request(module, req);
+fail:
+ talloc_free(tmp_ctx);
+ return ret;
}
/* similar to the modify for the time being.
static int acl_delete(struct ldb_module *module, struct ldb_request *req)
{
int ret;
- struct acl_context *ac;
- struct ldb_dn * parent = ldb_dn_get_parent(req, req->op.del.dn);
- char * filter;
+ struct ldb_dn *parent = ldb_dn_get_parent(req, req->op.del.dn);
struct ldb_context *ldb;
- struct acl_private *data;
+ struct ldb_control *as_system = ldb_request_get_control(req, LDB_CONTROL_AS_SYSTEM_OID);
- ldb = ldb_module_get_ctx(module);
- data = talloc_get_type(ldb_module_get_private(module), struct acl_private);
+ if (as_system != NULL) {
+ as_system->critical = 0;
+ }
- if (!data->perform_check)
+ DEBUG(10, ("ldb:acl_delete: %s\n", ldb_dn_get_linearized(req->op.del.dn)));
+ if (dsdb_module_am_system(module) || as_system) {
return ldb_next_request(module, req);
-
- ac = talloc(req, struct acl_context);
- if (ac == NULL) {
- return LDB_ERR_OPERATIONS_ERROR;
}
- if (ac->user_type == SECURITY_SYSTEM)
+ if (ldb_dn_is_special(req->op.del.dn)) {
+ return ldb_next_request(module, req);
+ }
+ ldb = ldb_module_get_ctx(module);
+ /* first check if we have delete object right */
+ ret = dsdb_module_check_access_on_dn(module, req, req->op.del.dn, SEC_STD_DELETE, NULL);
+ if (ret == LDB_SUCCESS) {
return ldb_next_request(module, req);
+ }
- ac->module = module;
- ac->req = req;
- ac->ignore_security = true;
- ac->dn_to_check = req->op.del.dn;
- ac->token = user_token(module);
- ac->user_type = what_is_user(module);
- ac->sec_result = LDB_SUCCESS;
- if (parent) {
- filter = talloc_asprintf(req,"(&(objectClass=*)(|(%s=%s)(%s=%s))))",
- ldb_dn_get_component_name(parent,0),
- ldb_dn_get_component_val(parent,0)->data,
- ldb_dn_get_component_name(req->op.del.dn,0),
- ldb_dn_get_component_val(req->op.del.dn,0)->data);
- ret = make_req_access_check(module, req, ac, filter);
-
- if (ret != LDB_SUCCESS){
- return ret;
- }
- return ldb_next_request(module, ac->down_req);
+ /* Nope, we don't have delete object. Lets check if we have delete child on the parent */
+ /* No parent, so check fails */
+ /* FIXME: this has to be made dynamic at some point */
+ if ((ldb_dn_compare(req->op.del.dn, (ldb_get_schema_basedn(ldb))) == 0) ||
+ (ldb_dn_compare(req->op.del.dn, (ldb_get_config_basedn(ldb))) == 0) ||
+ (ldb_dn_compare(req->op.del.dn, (ldb_get_default_basedn(ldb))) == 0) ||
+ (ldb_dn_compare(req->op.del.dn, (ldb_get_root_basedn(ldb))) == 0)) {
+ DEBUG(10,("acl:deleting an NC\n"));
+ return ldb_module_done(req, NULL, NULL, LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS);
}
+ ret = dsdb_module_check_access_on_dn(module, req, parent, SEC_ADS_DELETE_CHILD, NULL);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
return ldb_next_request(module, req);
}
static int acl_rename(struct ldb_module *module, struct ldb_request *req)
{
- struct ldb_dn *source_parent;
- struct ldb_dn *dest_parent;
int ret;
- struct acl_context *ac;
- char * filter;
+ struct ldb_dn *oldparent = ldb_dn_get_parent(req, req->op.rename.olddn);
+ struct ldb_dn *newparent = ldb_dn_get_parent(req, req->op.rename.newdn);
+ const struct dsdb_schema *schema;
struct ldb_context *ldb;
- struct acl_private *data;
+ struct security_descriptor *sd = NULL;
+ struct dom_sid *sid = NULL;
+ struct ldb_result *acl_res;
+ const struct GUID *guid;
+ struct object_tree *root = NULL;
+ struct object_tree *new_node = NULL;
+ struct ldb_control *as_system = ldb_request_get_control(req, LDB_CONTROL_AS_SYSTEM_OID);
+ TALLOC_CTX *tmp_ctx = talloc_new(req);
+ NTSTATUS status;
+ uint32_t access_granted;
+ const char *rdn_name;
+ static const char *acl_attrs[] = {
+ "nTSecurityDescriptor",
+ "objectClass",
+ "objectSid",
+ NULL
+ };
+
+ if (as_system != NULL) {
+ as_system->critical = 0;
+ }
+ DEBUG(10, ("ldb:acl_rename: %s\n", ldb_dn_get_linearized(req->op.rename.olddn)));
+ if (dsdb_module_am_system(module) || as_system) {
+ return ldb_next_request(module, req);
+ }
+ if (ldb_dn_is_special(req->op.rename.olddn)) {
+ return ldb_next_request(module, req);
+ }
ldb = ldb_module_get_ctx(module);
- data = talloc_get_type(ldb_module_get_private(module), struct acl_private);
- if (!data->perform_check)
- return ldb_next_request(module, req);
+ ret = dsdb_module_search_dn(module, req, &acl_res, req->op.rename.olddn,
+ acl_attrs,
+ DSDB_FLAG_NEXT_MODULE |
+ DSDB_SEARCH_SHOW_DELETED);
+ /* we sould be able to find the parent */
+ if (ret != LDB_SUCCESS) {
+ DEBUG(10,("acl: failed to find object %s\n",
+ ldb_dn_get_linearized(req->op.rename.olddn)));
+ return ret;
+ }
- ac = talloc(req, struct acl_context);
- if (ac == NULL) {
- return LDB_ERR_OPERATIONS_ERROR;
+ schema = dsdb_get_schema(ldb, acl_res);
+ if (!schema) {
+ talloc_free(acl_res);
+ return ldb_operr(ldb);
+ }
+
+ guid = get_oc_guid_from_message(module, schema, acl_res->msgs[0]);
+ if (!insert_in_object_tree(tmp_ctx, guid, SEC_ADS_WRITE_PROP,
+ &root, &new_node)) {
+ return ldb_operr(ldb);
+ };
+
+ guid = attribute_schemaid_guid_by_lDAPDisplayName(schema,
+ "name");
+ if (!insert_in_object_tree(tmp_ctx, guid, SEC_ADS_WRITE_PROP,
+ &new_node, &new_node)) {
+ return ldb_operr(ldb);
+ };
+
+ rdn_name = ldb_dn_get_rdn_name(req->op.rename.olddn);
+ if (rdn_name == NULL) {
+ return ldb_operr(ldb);
+ }
+ guid = attribute_schemaid_guid_by_lDAPDisplayName(schema,
+ rdn_name);
+ if (!insert_in_object_tree(tmp_ctx, guid, SEC_ADS_WRITE_PROP,
+ &new_node, &new_node)) {
+ return ldb_operr(ldb);
+ };
+
+ ret = dsdb_get_sd_from_ldb_message(ldb, req, acl_res->msgs[0], &sd);
+
+ if (ret != LDB_SUCCESS) {
+ return ldb_operr(ldb);
+ }
+ /* Theoretically we pass the check if the object has no sd */
+ if (!sd) {
+ return LDB_SUCCESS;
+ }
+ sid = samdb_result_dom_sid(req, acl_res->msgs[0], "objectSid");
+ status = sec_access_check_ds(sd, acl_user_token(module),
+ SEC_ADS_WRITE_PROP,
+ &access_granted,
+ root,
+ sid);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10, ("Object %s has no wp on name\n",
+ ldb_dn_get_linearized(req->op.rename.olddn)));
+ dsdb_acl_debug(sd,
+ acl_user_token(module),
+ req->op.rename.olddn,
+ true,
+ 10);
+ return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
}
- if (ac->user_type == SECURITY_SYSTEM)
+ if (ldb_dn_compare(oldparent, newparent) == 0) {
+ /* regular rename, not move, nothing more to do */
return ldb_next_request(module, req);
+ }
- ac->module = module;
- ac->req = req;
- ac->ignore_security = true;
- ac->token = user_token(module);
- ac->user_type = what_is_user(module);
- ac->sec_result = LDB_SUCCESS;
-
- /* We need to know if it is a simple rename or a move operation */
- source_parent = ldb_dn_get_parent(req, req->op.rename.olddn);
- dest_parent = ldb_dn_get_parent(req, req->op.rename.newdn);
-
- if (ldb_dn_compare(source_parent, dest_parent) == 0){
- /*Not a move, just rename*/
- filter = talloc_asprintf(req,"(&(objectClass=*)(|(%s=%s)(%s=%s))))",
- ldb_dn_get_component_name(dest_parent,0),
- ldb_dn_get_component_val(dest_parent,0)->data,
- ldb_dn_get_component_name(req->op.rename.olddn,0),
- ldb_dn_get_component_val(req->op.rename.olddn,0)->data);
- }
- else{
- filter = talloc_asprintf(req,"(&(objectClass=*)(|(%s=%s)(%s=%s))))",
- ldb_dn_get_component_name(dest_parent,0),
- ldb_dn_get_component_val(dest_parent,0)->data,
- ldb_dn_get_component_name(source_parent,0),
- ldb_dn_get_component_val(source_parent,0)->data);
- }
-
- ret = make_req_access_check(module, req, ac, filter);
-
- if (ret != LDB_SUCCESS){
+ /* What exactly to do in this case? It would fail anyway.. */
+ /* FIXME: this has to be made dynamic at some point */
+ if ((ldb_dn_compare(req->op.rename.newdn, (ldb_get_schema_basedn(ldb))) == 0) ||
+ (ldb_dn_compare(req->op.rename.newdn, (ldb_get_config_basedn(ldb))) == 0) ||
+ (ldb_dn_compare(req->op.rename.newdn, (ldb_get_default_basedn(ldb))) == 0) ||
+ (ldb_dn_compare(req->op.rename.newdn, (ldb_get_root_basedn(ldb))) == 0)) {
+ DEBUG(10,("acl:moving as an NC\n"));
+ return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
+ }
+ /* new parent should have create child */
+ talloc_free(tmp_ctx);
+ tmp_ctx = talloc_new(req);
+ root = NULL;
+ new_node = NULL;
+ guid = get_oc_guid_from_message(module, schema, acl_res->msgs[0]);
+ if (!guid) {
+ DEBUG(10,("acl:renamed object has no object class\n"));
+ return ldb_module_done(req, NULL, NULL, LDB_ERR_OPERATIONS_ERROR);
+ }
+
+ ret = dsdb_module_check_access_on_dn(module, req, newparent, SEC_ADS_CREATE_CHILD, guid);
+ if (ret != LDB_SUCCESS) {
+ DEBUG(10,("acl:access_denied renaming %s", ldb_dn_get_linearized(req->op.rename.olddn)));
return ret;
- }
- return ldb_next_request(module, ac->down_req);
+ }
+ /* do we have delete object on the object? */
+
+ status = sec_access_check_ds(sd, acl_user_token(module),
+ SEC_STD_DELETE,
+ &access_granted,
+ NULL,
+ sid);
+
+ if (NT_STATUS_IS_OK(status)) {
+ return ldb_next_request(module, req);
+ }
+ /* what about delete child on the current parent */
+ ret = dsdb_module_check_access_on_dn(module, req, oldparent, SEC_ADS_DELETE_CHILD, NULL);
+ if (ret != LDB_SUCCESS) {
+ DEBUG(10,("acl:access_denied renaming %s", ldb_dn_get_linearized(req->op.rename.olddn)));
+ return ldb_module_done(req, NULL, NULL, ret);
+ }
+ return ldb_next_request(module, req);
}
static int acl_search_callback(struct ldb_request *req, struct ldb_reply *ares)
{
struct ldb_context *ldb;
struct acl_context *ac;
- struct security_descriptor *sd;
- uint32_t searchFlags;
- uint32_t access_mask;
- struct object_tree *ot;
- int i, ret;
- NTSTATUS status;
- struct ldb_message_element *element_security_descriptor;
- struct ldb_message_element *element_object_class;
- const struct dsdb_attribute *attr;
- const struct dsdb_schema *schema;
- struct GUID *oc_guid;
+ struct acl_private *data;
+ struct ldb_result *acl_res;
+ static const char *acl_attrs[] = {
+ "objectClass",
+ "nTSecurityDescriptor",
+ "objectSid",
+ NULL
+ };
+ int ret, i;
ac = talloc_get_type(req->context, struct acl_context);
+ data = talloc_get_type(ldb_module_get_private(ac->module), struct acl_private);
ldb = ldb_module_get_ctx(ac->module);
- schema = dsdb_get_schema(ldb);
+
if (!ares) {
- return ldb_module_done(ac->req, NULL, NULL, LDB_ERR_OPERATIONS_ERROR);
+ return ldb_module_done(ac->req, NULL, NULL,
+ LDB_ERR_OPERATIONS_ERROR);
}
if (ares->error != LDB_SUCCESS) {
- return ldb_module_done(ac->req, ares->controls, ares->response, ares->error);
+ return ldb_module_done(ac->req, ares->controls,
+ ares->response, ares->error);
}
switch (ares->type) {
case LDB_REPLY_ENTRY:
- switch (ac->user_type) {
- case SECURITY_SYSTEM:
- case SECURITY_ANONYMOUS:/*FIXME: should we let anonymous have system access*/
- break;
- default:
- /* Access checks
- *
- * 0. If we do not have nTSecurityDescriptor, we do not have an object in the response,
- * so check the parent dn.
- * 1. Call sec_access_check on empty tree
- * 2. For each attribute call extended_access_check
- * 3. For each attribute call build_object_tree_form_attr_list and then check with sec_access_check
- *
- */
- element_security_descriptor = ldb_msg_find_element(ares->message, "nTSecurityDescriptor");
- element_object_class = ldb_msg_find_element(ares->message, "objectClass");
- if (!element_security_descriptor || !element_object_class)
- break;
-
- sd = talloc(ldb, struct security_descriptor);
- if(!sd) {
- return ldb_module_done(ac->req, NULL, NULL, LDB_ERR_OPERATIONS_ERROR);
+ if (ac->allowedAttributes
+ || ac->allowedChildClasses
+ || ac->allowedChildClassesEffective
+ || ac->allowedAttributesEffective
+ || ac->sDRightsEffective) {
+ ret = dsdb_module_search_dn(ac->module, ac, &acl_res, ares->message->dn,
+ acl_attrs,
+ DSDB_FLAG_NEXT_MODULE);
+ if (ret != LDB_SUCCESS) {
+ return ldb_module_done(ac->req, NULL, NULL, ret);
}
- if(!NDR_ERR_CODE_IS_SUCCESS(ndr_pull_struct_blob(&element_security_descriptor->values[0],
- ldb,
- NULL,
- sd,
- (ndr_pull_flags_fn_t)ndr_pull_security_descriptor))) {
- DEBUG(0, ("acl_search_callback: Error parsing security descriptor\n"));
- return ldb_module_done(ac->req, NULL, NULL, LDB_ERR_OPERATIONS_ERROR);
+ if (ac->allowedAttributes || ac->allowedAttributesEffective) {
+ ret = acl_allowedAttributes(ac->module, ac->schema, acl_res->msgs[0], ares->message, ac);
+ if (ret != LDB_SUCCESS) {
+ return ldb_module_done(ac->req, NULL, NULL, ret);
+ }
}
-
- oc_guid = class_schemaid_guid_by_lDAPDisplayName(schema, element_object_class->values[0].data);
- for (i=0; i<ares->message->num_elements; i++) {
- attr = dsdb_attribute_by_lDAPDisplayName(schema, ares->message->elements[i].name);
- if (attr) {
- searchFlags = attr->searchFlags;
- } else {
- searchFlags = 0x0;
+ if (ac->allowedChildClasses) {
+ ret = acl_childClasses(ac->module, ac->schema, acl_res->msgs[0],
+ ares->message, "allowedChildClasses");
+ if (ret != LDB_SUCCESS) {
+ return ldb_module_done(ac->req, NULL, NULL, ret);
}
-
- /*status = extended_access_check(ares->message->elements[i].name, access_mask, searchFlags); */ /* Todo FIXME */
- ac->access_needed = SEC_ADS_READ_PROP;
- if (NT_STATUS_IS_OK(status)) {
- ot = insert_in_object_tree(req, oc_guid, NULL, ac->access_needed, NULL);
-
- insert_in_object_tree(req,
- &attr->schemaIDGUID,
- &attr->attributeSecurityGUID,
- ac->access_needed,
- ot);
-
- status = sec_access_check_ds(sd,
- ac->token,
- ac->access_needed,
- &access_mask,
- ot);
-
- if (NT_STATUS_IS_OK(status)) {
- continue;
- }
+ }
+ if (ac->allowedChildClassesEffective) {
+ ret = acl_childClassesEffective(ac->module, ac->schema,
+ acl_res->msgs[0], ares->message, ac);
+ if (ret != LDB_SUCCESS) {
+ return ldb_module_done(ac->req, NULL, NULL, ret);
+ }
+ }
+ if (ac->sDRightsEffective) {
+ ret = acl_sDRightsEffective(ac->module,
+ acl_res->msgs[0], ares->message, ac);
+ if (ret != LDB_SUCCESS) {
+ return ldb_module_done(ac->req, NULL, NULL, ret);
}
- ldb_msg_remove_attr(ares->message, ares->message->elements[i].name);
}
- break;
}
- if (ac->nTSecurityDescriptor) {
- ldb_msg_remove_attr(ares->message, "nTSecurityDescriptor");
- } else if (ac->objectClass) {
- ldb_msg_remove_attr(ares->message, "objectClass");
+ if (data && data->password_attrs) {
+ if (!ac->am_system) {
+ for (i = 0; data->password_attrs[i]; i++) {
+ ldb_msg_remove_attr(ares->message, data->password_attrs[i]);
+ }
+ }
}
-
return ldb_module_send_entry(ac->req, ares->message, ares->controls);
+
case LDB_REPLY_REFERRAL:
return ldb_module_send_referral(ac->req, ares->referral);
case LDB_REPLY_DONE:
- return ldb_module_done(ac->req, ares->controls,ares->response, LDB_SUCCESS);
- }
+ return ldb_module_done(ac->req, ares->controls,
+ ares->response, LDB_SUCCESS);
- return LDB_SUCCESS;
+ }
+ return LDB_SUCCESS;
}
static int acl_search(struct ldb_module *module, struct ldb_request *req)
{
- int ret;
struct ldb_context *ldb;
struct acl_context *ac;
- const char **attrs;
- struct ldb_control *sd_control;
- struct ldb_control **sd_saved_controls;
- struct ldb_dn * parent;
+ struct ldb_request *down_req;
struct acl_private *data;
+ int ret, i;
ldb = ldb_module_get_ctx(module);
- data = talloc_get_type(ldb_module_get_private(module), struct acl_private);
-
- if (!data || !data->perform_check)
- return ldb_next_request(module, req);
- if (what_is_user(module) == SECURITY_SYSTEM)
- return ldb_next_request(module, req);
-
- ac = talloc_get_type(req->context, struct acl_context);
- if ( ac == NULL ) {
- ac = talloc(req, struct acl_context);
- if (ac == NULL) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
- }
- ac->module = module;
- ac->req = req;
- ac->ignore_security = false;
- ac->user_type = what_is_user(module);
- ac->token = user_token(module);
- ac->dn_to_check = req->op.search.base;
- ac->sec_result = LDB_SUCCESS;
-
- attrs = talloc_array(ac, const char*, 2);
- attrs[0] = talloc_strdup(attrs, "nTSecurityDescriptor");
- attrs[1] = NULL;
- parent = ldb_dn_get_parent(req, ac->dn_to_check);
- if (!is_root_base_dn(ldb, req->op.search.base) && parent && !is_root_base_dn(ldb, parent)) {
- /*we have parent so check for visibility*/
- ret = ldb_build_search_req(&ac->down_req,
- ldb, ac,
- parent,
- LDB_SCOPE_BASE,
- "(objectClass=*)",
- attrs,
- req->controls,
- ac, acl_visible_callback,
- req);
- if (ret != LDB_SUCCESS) {
- return ret;
- }
- return ldb_next_request(module, ac->down_req);
- } else {
- return acl_forward_search(ac);
- }
+ ac = talloc_zero(req, struct acl_context);
+ if (ac == NULL) {
+ return ldb_oom(ldb);
}
-
- return ldb_next_request(module, req);
-}
-
-static int acl_extended(struct ldb_module *module, struct ldb_request *req)
-{
- struct ldb_context *ldb = ldb_module_get_ctx(module);
- enum security_user_level user_type;
- struct acl_private *data;
-
data = talloc_get_type(ldb_module_get_private(module), struct acl_private);
- if (!data->perform_check)
- return ldb_next_request(module, req);
-
- /* allow everybody to read the sequence number */
- if (strcmp(req->op.extended.oid, LDB_EXTENDED_SEQUENCE_NUMBER) == 0) {
- return ldb_next_request(module, req);
+ ac->module = module;
+ ac->req = req;
+ ac->am_system = dsdb_module_am_system(module);
+ ac->allowedAttributes = ldb_attr_in_list(req->op.search.attrs, "allowedAttributes");
+ ac->allowedAttributesEffective = ldb_attr_in_list(req->op.search.attrs, "allowedAttributesEffective");
+ ac->allowedChildClasses = ldb_attr_in_list(req->op.search.attrs, "allowedChildClasses");
+ ac->allowedChildClassesEffective = ldb_attr_in_list(req->op.search.attrs, "allowedChildClassesEffective");
+ ac->sDRightsEffective = ldb_attr_in_list(req->op.search.attrs, "sDRightsEffective");
+ ac->schema = dsdb_get_schema(ldb, ac);
+
+ /* replace any attributes in the parse tree that are private,
+ so we don't allow a search for 'userPassword=penguin',
+ just as we would not allow that attribute to be returned */
+ if (ac->am_system) {
+ /* FIXME: We should copy the tree and keep the original unmodified. */
+ /* remove password attributes */
+ if (data && data->password_attrs) {
+ for (i = 0; data->password_attrs[i]; i++) {
+ ldb_parse_tree_attr_replace(req->op.search.tree,
+ data->password_attrs[i],
+ "kludgeACLredactedattribute");
+ }
+ }
}
-
- user_type = what_is_user(module);
- switch (user_type) {
- case SECURITY_SYSTEM:
- case SECURITY_ADMINISTRATOR:
- return ldb_next_request(module, req);
- default:
- ldb_asprintf_errstring(ldb,
- "acl_extended: attempted database modify not permitted."
- "User %s is not SYSTEM or an Administrator",
- user_name(req, module));
- return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
+ ret = ldb_build_search_req_ex(&down_req,
+ ldb, ac,
+ req->op.search.base,
+ req->op.search.scope,
+ req->op.search.tree,
+ req->op.search.attrs,
+ req->controls,
+ ac, acl_search_callback,
+ req);
+ if (ret != LDB_SUCCESS) {
+ return ret;
}
+ /* perform the search */
+ return ldb_next_request(module, down_req);
}
_PUBLIC_ const struct ldb_module_ops ldb_acl_module_ops = {
.modify = acl_modify,
.del = acl_delete,
.rename = acl_rename,
- .extended = acl_extended,
.init_context = acl_module_init
};
git.samba.org / kamenim / samba.git / blobdiff