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- /*############################################################################
- # Copyright 2017 Intel Corporation
- #
- # Licensed under the Apache License, Version 2.0 (the "License");
- # you may not use this file except in compliance with the License.
- # You may obtain a copy of the License at
- #
- # http://www.apache.org/licenses/LICENSE-2.0
- #
- # Unless required by applicable law or agreed to in writing, software
- # distributed under the License is distributed on an "AS IS" BASIS,
- # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- # See the License for the specific language governing permissions and
- # limitations under the License.
- ############################################################################*/
- /// Basename management implementation
- /*! \file */
- #include "epid/member/src/allowed_basenames.h"
- #include <stdint.h>
- #include "epid/common/src/memory.h"
- typedef struct AllowedBasename {
- struct AllowedBasename* next; ///< pointer to the next base name
- size_t length; ///< size of base name
- uint8_t name[1]; ///< base name (flexible array)
- } AllowedBasename;
- typedef struct AllowedBasenames { AllowedBasename* data; } AllowedBasenames;
- /// Creates empty list of allowed basenames
- EpidStatus CreateBasenames(AllowedBasenames** basename_container) {
- AllowedBasenames* new_container = NULL;
- if (!basename_container) {
- return kEpidBadArgErr;
- }
- new_container = SAFE_ALLOC(sizeof(AllowedBasenames));
- if (!new_container) {
- return kEpidMemAllocErr;
- }
- new_container->data = NULL;
- *basename_container = new_container;
- return kEpidNoErr;
- }
- /// Checks if given basename is in the allowed list
- bool IsBasenameAllowed(AllowedBasenames const* basenames, void const* basename,
- size_t length) {
- if (!basenames || !length) {
- return false;
- } else {
- AllowedBasename* rootnode = basenames->data;
- while (rootnode != NULL) {
- if (rootnode->length == length) {
- if (!memcmp(rootnode->name, basename, length)) {
- return true;
- }
- }
- rootnode = rootnode->next;
- }
- }
- return false;
- }
- /// Adds a new allowed basename
- EpidStatus AllowBasename(AllowedBasenames* basenames, void const* basename,
- size_t length) {
- AllowedBasename* newnode = NULL;
- if (length > (SIZE_MAX - sizeof(AllowedBasename)) + 1) {
- return kEpidBadArgErr;
- }
- if (!basenames || !basename) {
- return kEpidBadArgErr;
- }
- newnode = SAFE_ALLOC(sizeof(AllowedBasename) + (length - 1));
- if (!newnode) {
- return kEpidMemAllocErr;
- }
- newnode->next = NULL;
- newnode->length = length;
- // Memory copy is used to copy a flexible array
- if (0 != memcpy_S(newnode->name, length, basename, length)) {
- SAFE_FREE(newnode);
- return kEpidBadArgErr;
- }
- if (!basenames->data) {
- basenames->data = newnode;
- } else {
- AllowedBasename* currentnode = basenames->data;
- while (NULL != currentnode->next) {
- currentnode = currentnode->next;
- }
- currentnode->next = newnode;
- }
- return kEpidNoErr;
- }
- /// Deletes list of allowed basenames
- void DeleteBasenames(AllowedBasenames** basename_container) {
- if (basename_container && *basename_container) {
- AllowedBasename* rootnode = (*basename_container)->data;
- while (rootnode) {
- AllowedBasename* deletenode = rootnode;
- rootnode = rootnode->next;
- SAFE_FREE(deletenode);
- }
- (*basename_container)->data = NULL;
- SAFE_FREE(*basename_container);
- }
- }
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