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
  22 #include "provisioningmanager.h"
  23 #include "credentialgenerator.h"
  24 #include "oic_malloc.h"
  25 #include "logger.h"
  26 #include "credresource.h"
  27 #include "ocrandom.h"
  28 #include "base64.h"
  29 #define TAG "SPProvisionAPI"
  30 #define KEY_LENGTH 16
  31
  32 SPResult SPGeneratePairWiseCredentials(OicSecCredType_t type, const OicUuid_t *ptDeviceId,
  33                                        const OicUuid_t *firstDeviceId,
  34                                        const OicUuid_t *secondDeviceId,
  35                                        OicSecCred_t **firstCred,
  36                                        OicSecCred_t **secondCred)
  37 {
  38
  39     if (NULL == ptDeviceId || NULL == firstDeviceId || NULL == secondDeviceId)
  40     {
  41         return SP_RESULT_INVALID_PARAM;
  42     }
  43     uint8_t privData[KEY_LENGTH] = {0,};
  44     OCFillRandomMem(privData, KEY_LENGTH);
  45
  46     uint32_t outLen = 0;
  47     char base64Buff[B64ENCODE_OUT_SAFESIZE(sizeof(privData)) + 1] = {};
  48     B64Result b64Ret = b64Encode(privData, sizeof(privData), base64Buff,
  49                                 sizeof(base64Buff), &outLen);
  50     if (B64_OK != b64Ret)
  51     {
  52         OC_LOG(ERROR, TAG, "Error while encoding key");
  53         return SP_RESULT_INTERNAL_ERROR;
  54     }
  55
  56     // TODO currently owner array is 1. only provisioning tool's id.
  57     OicSecCred_t *tempFirstCred =  GenerateCredential(secondDeviceId, type, NULL, base64Buff, 1,
  58                                    ptDeviceId);
  59     if (NULL == tempFirstCred)
  60     {
  61         OC_LOG(ERROR, TAG, "Error while generating credential.");
  62         return SP_RESULT_INTERNAL_ERROR;
  63     }
  64     // TODO currently owner array is 1. only provisioning tool's id.
  65     OicSecCred_t *tempSecondCred =  GenerateCredential(firstDeviceId, type, NULL, base64Buff, 1,
  66                                     ptDeviceId);
  67     if (NULL == tempSecondCred)
  68     {
  69         DeleteCredList(tempFirstCred);
  70         OC_LOG(ERROR, TAG, "Error while generating credential.");
  71         return SP_RESULT_INTERNAL_ERROR;
  72     }
  73     *firstCred = tempFirstCred;
  74     *secondCred = tempSecondCred;
  75     return SP_RESULT_SUCCESS;
  76 }