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Diffstat (limited to 'source4/libcli/security/object_tree.c')
-rw-r--r-- | source4/libcli/security/object_tree.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/source4/libcli/security/object_tree.c b/source4/libcli/security/object_tree.c new file mode 100644 index 0000000000..8a90019a59 --- /dev/null +++ b/source4/libcli/security/object_tree.c @@ -0,0 +1,106 @@ +/* + Unix SMB/CIFS implementation. + + security access checking routines + + Copyright (C) Nadezhda Ivanova 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/>. +*/ + +/* + * Description: Contains data handler functions for + * the object tree that must be constructed to perform access checks. + * The object tree is an unbalanced tree of depth 3, indexed by + * object type guid. Perhaps a different data structure + * should be concidered later to improve performance + * + * Author: Nadezhda Ivanova + */ +#include "includes.h" +#include "libcli/security/security.h" +#include "lib/util/dlinklist.h" +#include "librpc/ndr/libndr.h" + +/* Adds a new node to the object tree. If attributeSecurityGUID is not zero and + * has already been added to the tree, the new node is added as a child of that node + * In all other cases as a child of the root + */ + +struct object_tree * insert_in_object_tree(TALLOC_CTX *mem_ctx, + const struct GUID *schemaGUIDID, + const struct GUID *attributeSecurityGUID, + uint32_t init_access, + struct object_tree *root) +{ + struct object_tree * parent = NULL; + struct object_tree * new_node; + + new_node = talloc(mem_ctx, struct object_tree); + if (!new_node) + return NULL; + memset(new_node, 0, sizeof(struct object_tree)); + new_node->remaining_access = init_access; + + if (!root){ + memcpy(&new_node->guid, schemaGUIDID, sizeof(struct GUID)); + return new_node; + } + + if (attributeSecurityGUID && !GUID_all_zero(attributeSecurityGUID)){ + parent = get_object_tree_by_GUID(root, attributeSecurityGUID); + memcpy(&new_node->guid, attributeSecurityGUID, sizeof(struct GUID)); + } + else + memcpy(&new_node->guid, schemaGUIDID, sizeof(struct GUID)); + + if (!parent) + parent = root; + + new_node->remaining_access = init_access; + DLIST_ADD(parent, new_node); + return new_node; +} + +/* search by GUID */ +struct object_tree * get_object_tree_by_GUID(struct object_tree *root, + const struct GUID *guid) +{ + struct object_tree *p; + struct object_tree *result = NULL; + + if (!root || GUID_equal(&root->guid, guid)) + result = root; + else{ + for (p = root->children; p != NULL; p = p->next) + if ((result = get_object_tree_by_GUID(p, guid))) + break; + } + + return result; +} + +/* Change the granted access per each ACE */ + +void object_tree_modify_access(struct object_tree *root, + uint32_t access) +{ + struct object_tree *p; + if (root){ + root->remaining_access &= ~access; + } + + for (p = root->children; p != NULL; p = p->next) + object_tree_modify_access(p, access); +} |