pal_plat_rot_insecure.cpp

00001 // ----------------------------------------------------------------------------
00002 // Copyright 2016-2017 ARM Ltd.
00003 //
00004 // SPDX-License-Identifier: Apache-2.0
00005 //
00006 // Licensed under the Apache License, Version 2.0 (the "License");
00007 // you may not use this file except in compliance with the License.
00008 // You may obtain a copy of the License at
00009 //
00010 //     http://www.apache.org/licenses/LICENSE-2.0
00011 //
00012 // Unless required by applicable law or agreed to in writing, software
00013 // distributed under the License is distributed on an "AS IS" BASIS,
00014 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00015 // See the License for the specific language governing permissions and
00016 // limitations under the License.
00017 // ----------------------------------------------------------------------------
00018 
00019 
00020 #include "pal_plat_rtos.h"
00021 
00022 #define PAL_DEVICE_KEY_SIZE_IN_BYTES 16
00023 
00024 //THIS CODE IS FOR TESTING PURPOSES ONLY. DO NOT USE IN PRODUCTION ENVIRONMENTS. REPLACE WITH A PROPER IMPLEMENTATION BEFORE USE
00025 palStatus_t  __attribute__((weak)) pal_plat_osGetRoT128Bit(uint8_t *keyBuf, size_t keyLenBytes)
00026 {
00027 #if defined (__CC_ARM)          /* ARM compiler. */
00028     #warning("PAL_INSECURE- You are using insecure Root Of Trust implementation, DO NOT USE IN PRODUCTION ENVIRONMENTS. REPLACE WITH A PROPER IMPLEMENTATION BEFORE USE")
00029 #else
00030     #pragma message ("You are using insecure Root Of Trust implementation, DO NOT USE IN PRODUCTION ENVIRONMENTS. REPLACE WITH A PROPER IMPLEMENTATION BEFORE USE")
00031 #endif
00032     static bool runOnce = true;
00033     if (runOnce) {
00034 
00035         PAL_LOG(WARN, "You are using insecure Root Of Trust implementation");
00036         runOnce = false;
00037     }
00038 
00039     if (keyLenBytes < PAL_DEVICE_KEY_SIZE_IN_BYTES) {
00040         return PAL_ERR_BUFFER_TOO_SMALL ;
00041     }
00042 
00043     if (NULL == keyBuf) {
00044         return PAL_ERR_NULL_POINTER ;
00045     }
00046 
00047     for (int i=0; i < PAL_DEVICE_KEY_SIZE_IN_BYTES; i++) {
00048         keyBuf[i] = i;
00049     }
00050 
00051     return PAL_SUCCESS;
00052 }
00053