resource/csdk/security/provisioning/src/credentialgenerator.c

   1 /* *****************************************************************
   2  *
   3  * Copyright 2015 Samsung Electronics All Rights Reserved.
   4  *
   5  *
   6  *
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *     http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  *
  19  * *****************************************************************/
  20 #include <string.h>
  21 #include "credentialgenerator.h"
  22 #include "base64.h"
  23 #include "oic_malloc.h"
  24 #include "oic_string.h"
  25 #include "ocpayload.h"
  26 #include "payload_logging.h"
  27 #include "credresource.h"
  28 #include "ocrandom.h"
  29 #include "srmutility.h"
  30 #include "stdbool.h"
  31 #include "securevirtualresourcetypes.h"
  32
  33 #define TAG "OIC_SRPAPI_CG"
  34
  35 OCStackResult PMGeneratePairWiseCredentials(OicSecCredType_t type, size_t keySize,
  36         const OicUuid_t *ptDeviceId, const OicUuid_t *firstDeviceId,
  37         const OicUuid_t *secondDeviceId, OicSecCred_t **firstCred, OicSecCred_t **secondCred)
  38 {
  39     if (NULL == ptDeviceId || NULL == firstDeviceId || NULL == firstCred || NULL != *firstCred || \
  40         NULL == secondDeviceId || NULL == secondCred || NULL != *secondCred)
  41     {
  42         OIC_LOG(INFO, TAG, "Invalid params");
  43         return OC_STACK_INVALID_PARAM;
  44     }
  45     if(!(keySize == OWNER_PSK_LENGTH_128 || keySize == OWNER_PSK_LENGTH_256))
  46     {
  47         OIC_LOG(INFO, TAG, "Invalid key size");
  48         return OC_STACK_INVALID_PARAM;
  49     }
  50     OCStackResult res = OC_STACK_ERROR;
  51     OicSecCred_t *tempFirstCred = NULL;
  52     OicSecCred_t *tempSecondCred = NULL;
  53
  54     size_t privDataKeySize = keySize;
  55
  56     uint8_t *privData = (uint8_t *)OICCalloc(privDataKeySize, sizeof(uint8_t));
  57     VERIFY_NON_NULL(TAG, privData, ERROR);
  58     OicSecKey_t privKey = {.data=privData, .len=keySize};
  59
  60     OCFillRandomMem(privData, privDataKeySize);
  61
  62     // TODO: currently owner array is 1. only provisioning tool's id.
  63     tempFirstCred =  GenerateCredential(secondDeviceId, type, NULL, &privKey, ptDeviceId, NULL);
  64     VERIFY_NON_NULL(TAG, tempFirstCred, ERROR);
  65
  66     // TODO: currently owner array is 1. only provisioning tool's id.
  67     tempSecondCred =  GenerateCredential(firstDeviceId, type, NULL, &privKey, ptDeviceId, NULL);
  68     VERIFY_NON_NULL(TAG, tempSecondCred, ERROR);
  69
  70     *firstCred = tempFirstCred;
  71     *secondCred = tempSecondCred;
  72     res = OC_STACK_OK;
  73
  74 exit:
  75     OICClearMemory(privData, privDataKeySize);
  76     OICFree(privData);
  77
  78     if(res != OC_STACK_OK)
  79     {
  80         OICFree(tempFirstCred);
  81         OICFree(tempSecondCred);
  82         *firstCred = NULL;
  83         *secondCred = NULL;
  84     }
  85
  86     return res;
  87 }