pal_insecure_ROT.c

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