+/* Not sure what this has to be,
+* and it does not seem to have any influence */
+static bool object_in_list(struct GUID *object_list, struct GUID *object)
+{
+ return true;
+}
+
+
+static bool contains_inheritable_aces(struct security_acl *acl)
+{
+ int i;
+ if (!acl)
+ return false;
+
+ for (i=0; i < acl->num_aces; i++) {
+ struct security_ace *ace = &acl->aces[i];
+ if ((ace->flags & SEC_ACE_FLAG_CONTAINER_INHERIT) ||
+ (ace->flags & SEC_ACE_FLAG_OBJECT_INHERIT))
+ return true;
+ }
+
+ return false;
+}
+
+static struct security_acl *preprocess_creator_acl(TALLOC_CTX *mem, struct security_acl *acl)
+{
+ int i;
+ struct security_acl *new_acl = talloc_zero(mem, struct security_acl);
+
+ new_acl->revision = acl->revision;
+ for (i=0; i < acl->num_aces; i++) {
+ struct security_ace *ace = &acl->aces[i];
+ if (!(ace->flags & SEC_ACE_FLAG_INHERITED_ACE)){
+ new_acl->aces = talloc_realloc(new_acl, new_acl->aces, struct security_ace,
+ new_acl->num_aces+1);
+ if (new_acl->aces == NULL) {
+ talloc_free(new_acl);
+ return NULL;
+ }
+ new_acl->aces[new_acl->num_aces] = *ace;
+ /*memcpy(&new_acl->aces[new_acl->num_aces], ace,
+ sizeof(struct security_ace)); */
+ new_acl->num_aces++;
+ }
+ }
+ if (new_acl)
+ new_acl->revision = acl->revision;
+ /* Todo what to do if all were inherited and this is empty */
+ return new_acl;
+}
+
+/* This is not exactly as described in the docs. The original seemed to return
+ * only a list of the inherited or flagless ones... */
+
+static bool postprocess_acl(struct security_acl *acl,
+ struct dom_sid *owner,
+ struct dom_sid *group,
+ uint32_t (*generic_map)(uint32_t access_mask))
+{
+ int i;
+ struct dom_sid *co, *cg;
+ TALLOC_CTX *tmp_ctx = talloc_new(acl);
+ if (!generic_map){
+ return false;
+ }
+ co = dom_sid_parse_talloc(tmp_ctx, SID_CREATOR_OWNER);
+ cg = dom_sid_parse_talloc(tmp_ctx, SID_CREATOR_GROUP);
+ for (i=0; i < acl->num_aces; i++){
+ struct security_ace *ace = &acl->aces[i];
+ if (!(ace->flags == 0 || ace->flags & SEC_ACE_FLAG_INHERITED_ACE))
+ continue;
+ if (ace->flags & SEC_ACE_FLAG_INHERIT_ONLY)
+ continue;
+ if (dom_sid_equal(&ace->trustee, co)){
+ ace->trustee = *owner;
+ /* perhaps this should be done somewhere else? */
+ ace->flags &= ~SEC_ACE_FLAG_CONTAINER_INHERIT;
+ }
+ if (dom_sid_equal(&ace->trustee, cg)){
+ ace->trustee = *group;
+ ace->flags &= ~SEC_ACE_FLAG_CONTAINER_INHERIT;
+ }
+ ace->access_mask = generic_map(ace->access_mask);
+ }
+
+ talloc_free(tmp_ctx);
+ return true;
+}
+
+static struct security_acl *calculate_inherited_from_parent(TALLOC_CTX *mem_ctx,
+ struct security_acl *acl,
+ bool is_container,
+ struct GUID *object_list)
+{
+ int i;
+ TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+ struct security_acl *tmp_acl = talloc_zero(tmp_ctx, struct security_acl);
+ struct security_acl *inh_acl = talloc_zero(tmp_ctx, struct security_acl);
+ struct security_acl *new_acl;
+ struct dom_sid *co, *cg;
+ if (!tmp_acl || !inh_acl)
+ return NULL;
+
+ co = dom_sid_parse_talloc(tmp_ctx, SID_CREATOR_OWNER);
+ cg = dom_sid_parse_talloc(tmp_ctx, SID_CREATOR_GROUP);
+
+ for (i=0; i < acl->num_aces; i++){
+ struct security_ace *ace = &acl->aces[i];
+ if (ace->flags & SEC_ACE_FLAG_INHERIT_ONLY)
+ continue;
+
+ if ((ace->flags & SEC_ACE_FLAG_CONTAINER_INHERIT) ||
+ (ace->flags & SEC_ACE_FLAG_OBJECT_INHERIT)){
+ tmp_acl->aces = talloc_realloc(tmp_acl, tmp_acl->aces, struct security_ace,
+ tmp_acl->num_aces+1);
+ if (tmp_acl->aces == NULL) {
+ talloc_free(tmp_ctx);
+ return NULL;
+ }
+
+ tmp_acl->aces[tmp_acl->num_aces] = *ace;
+ tmp_acl->aces[tmp_acl->num_aces].flags |= SEC_ACE_FLAG_INHERITED_ACE;
+
+ if (is_container && (ace->flags & SEC_ACE_FLAG_OBJECT_INHERIT))
+ tmp_acl->aces[tmp_acl->num_aces].flags |= SEC_ACE_FLAG_INHERIT_ONLY;
+
+ if (ace->type == SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT ||
+ ace->type == SEC_ACE_TYPE_ACCESS_DENIED_OBJECT){
+ if (!object_in_list(object_list, &ace->object.object.type.type)){
+ tmp_acl->aces[tmp_acl->num_aces].flags |= SEC_ACE_FLAG_INHERIT_ONLY;
+ }
+
+ }
+ tmp_acl->num_aces++;
+ }
+ }
+
+ if (is_container){
+ for (i=0; i < acl->num_aces; i++){
+ struct security_ace *ace = &acl->aces[i];
+
+ if (ace->flags & SEC_ACE_FLAG_NO_PROPAGATE_INHERIT)
+ continue;
+ if (!dom_sid_equal(&ace->trustee, co) && !dom_sid_equal(&ace->trustee, cg))
+ continue;
+
+ if ((ace->flags & SEC_ACE_FLAG_CONTAINER_INHERIT) ||
+ (ace->flags & SEC_ACE_FLAG_OBJECT_INHERIT)){
+ inh_acl->aces = talloc_realloc(inh_acl, inh_acl->aces, struct security_ace,
+ inh_acl->num_aces+1);
+ if (inh_acl->aces == NULL){
+ talloc_free(tmp_ctx);
+ return NULL;
+ }
+ inh_acl->aces[inh_acl->num_aces] = *ace;
+ inh_acl->aces[inh_acl->num_aces].flags |= SEC_ACE_FLAG_INHERIT_ONLY;
+ inh_acl->aces[inh_acl->num_aces].flags |= SEC_ACE_FLAG_INHERITED_ACE;
+ inh_acl->num_aces++;
+ }
+ }
+ }
+ new_acl = security_acl_concatenate(mem_ctx,tmp_acl, inh_acl);
+ if (new_acl)
+ new_acl->revision = acl->revision;
+ talloc_free(tmp_ctx);
+ return new_acl;
+}
+
+/* In the docs this looks == calculate_inherited_from_parent. However,
+ * It shouldn't return the inherited, rather filter them out....
+ */
+static struct security_acl *calculate_inherited_from_creator(TALLOC_CTX *mem_ctx,
+ struct security_acl *acl,
+ bool is_container,
+ struct GUID *object_list)
+{
+ int i;
+ TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+ struct security_acl *tmp_acl = talloc_zero(tmp_ctx, struct security_acl);
+/* struct security_acl *inh_acl = talloc_zero(tmp_ctx, struct security_acl); */
+ struct security_acl *new_acl;
+ struct dom_sid *co, *cg;
+
+ if (!tmp_acl)
+ return NULL;
+
+ co = dom_sid_parse_talloc(tmp_ctx, SID_CREATOR_OWNER);
+ cg = dom_sid_parse_talloc(tmp_ctx, SID_CREATOR_GROUP);
+
+ for (i=0; i < acl->num_aces; i++){
+ struct security_ace *ace = &acl->aces[i];
+ if (ace->flags & SEC_ACE_FLAG_INHERITED_ACE)
+ continue;
+
+ tmp_acl->aces = talloc_realloc(tmp_acl, tmp_acl->aces, struct security_ace,
+ tmp_acl->num_aces+1);
+ tmp_acl->aces[tmp_acl->num_aces] = *ace;
+ tmp_acl->aces[tmp_acl->num_aces].flags = 0;
+ tmp_acl->num_aces++;
+
+ if (!dom_sid_equal(&ace->trustee, co) && !dom_sid_equal(&ace->trustee, cg))
+ continue;
+
+ tmp_acl->aces = talloc_realloc(tmp_acl, tmp_acl->aces, struct security_ace,
+ tmp_acl->num_aces+1);
+ tmp_acl->aces[tmp_acl->num_aces] = *ace;
+ tmp_acl->aces[tmp_acl->num_aces].flags |= SEC_ACE_FLAG_INHERIT_ONLY;
+ tmp_acl->num_aces++;
+ }
+ new_acl = security_acl_dup(mem_ctx,tmp_acl);
+
+ talloc_free(tmp_ctx);
+ return new_acl;
+}
+
+static bool compute_acl(int acl_type,
+ struct security_descriptor *parent_sd,
+ struct security_descriptor *creator_sd,
+ bool is_container,
+ uint32_t inherit_flags,
+ struct GUID *object_list,
+ uint32_t (*generic_map)(uint32_t access_mask),
+ struct security_token *token,
+ struct security_descriptor *new_sd) /* INOUT argument */
+{
+ struct security_acl *p_acl = NULL, *c_acl = NULL, **new_acl;
+ if (acl_type == SEC_DESC_DACL_PRESENT){
+ if (parent_sd)
+ p_acl = parent_sd->dacl;
+ if (creator_sd)
+ c_acl = creator_sd->dacl;
+ new_acl = &new_sd->dacl;
+ }
+ else{
+ if (parent_sd)
+ p_acl = parent_sd->sacl;
+ if (creator_sd)
+ c_acl = creator_sd->sacl;
+ new_acl = &new_sd->sacl;
+ }
+ if (contains_inheritable_aces(p_acl)){
+ if (!c_acl || (c_acl && inherit_flags & SEC_DEFAULT_DESCRIPTOR)){
+ *new_acl = calculate_inherited_from_parent(new_sd,
+ p_acl,
+ is_container,
+ object_list);
+ if (*new_acl == NULL)
+ goto final;
+ if (!postprocess_acl(*new_acl, new_sd->owner_sid,
+ new_sd->group_sid, generic_map))
+ return false;
+ else
+ goto final;
+ }
+ if (c_acl && !(inherit_flags & SEC_DEFAULT_DESCRIPTOR)){
+ struct security_acl *pr_acl, *tmp_acl, *tpr_acl;
+ tpr_acl = preprocess_creator_acl(new_sd, c_acl);
+ tmp_acl = calculate_inherited_from_creator(new_sd,
+ tpr_acl,
+ is_container,
+ object_list);
+ /* Todo some refactoring here! */
+ if (acl_type == SEC_DESC_DACL_PRESENT &&
+ !(creator_sd->type & SECINFO_PROTECTED_DACL) &&
+ (inherit_flags & SEC_DACL_AUTO_INHERIT)){
+ pr_acl = calculate_inherited_from_parent(new_sd,
+ p_acl,
+ is_container,
+ object_list);
+
+ *new_acl = security_acl_concatenate(new_sd, tmp_acl, pr_acl);
+ new_sd->type |= SEC_DESC_DACL_AUTO_INHERITED;
+ }
+ else if (acl_type == SEC_DESC_SACL_PRESENT &&
+ !(creator_sd->type & SECINFO_PROTECTED_SACL) &&
+ (inherit_flags & SEC_SACL_AUTO_INHERIT)){
+ pr_acl = calculate_inherited_from_parent(new_sd,
+ p_acl,
+ is_container,
+ object_list);
+
+ *new_acl = security_acl_concatenate(new_sd, tmp_acl, pr_acl);
+ new_sd->type |= SEC_DESC_SACL_AUTO_INHERITED;
+ }
+ }
+ if (*new_acl == NULL)
+ goto final;
+ if (!postprocess_acl(*new_acl, new_sd->owner_sid,
+ new_sd->group_sid,generic_map))
+ return false;
+ else
+ goto final;
+ }
+ else{
+ if (!c_acl){
+ if (acl_type == SEC_DESC_DACL_PRESENT && token->default_dacl)
+ *new_acl = security_acl_dup(new_sd, token->default_dacl);
+ }
+ else{
+ *new_acl = preprocess_creator_acl(new_sd,c_acl);
+ if (*new_acl == NULL)
+ goto final;
+ if (!postprocess_acl(*new_acl, new_sd->owner_sid,
+ new_sd->group_sid,generic_map))
+ return false;
+ else
+ goto final;
+ }
+ }
+final:
+ if (acl_type == SEC_DESC_DACL_PRESENT && new_sd->dacl)
+ new_sd->type |= SEC_DESC_DACL_PRESENT;
+
+ if (acl_type == SEC_DESC_SACL_PRESENT && new_sd->sacl)
+ new_sd->type |= SEC_DESC_SACL_PRESENT;
+ /* This is a hack to handle the fact that
+ * apprantly any AI flag provided by the user is preserved */
+ if (creator_sd)
+ new_sd->type |= creator_sd->type;
+ return true;
+}
+
git.samba.org / ira / wip.git / blobdiff