resource/csdk/security/provisioning/src/secureresourceprovider.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 <stdio.h>
  21 #include <string.h>
  22 #include <stdint.h>
  23 #include <unistd.h>
  24
  25 #include "ocprovisioningmanager.h"
  26 #include "secureresourceprovider.h"
  27 #include "logger.h"
  28 #include "oic_malloc.h"
  29 #include "aclresource.h"
  30 #include "pstatresource.h"
  31 #include "srmresourcestrings.h"
  32 #include "credresource.h"
  33 #include "doxmresource.h"
  34 #include "pconfresource.h"
  35 #include "credentialgenerator.h"
  36 #include "cainterface.h"
  37 #include "cJSON.h"
  38 #include "pmtypes.h"
  39 #include "pmutility.h"
  40 #include "provisioningdatabasemanager.h"
  41 #include "base64.h"
  42 #include "utlist.h"
  43 #include "ocpayload.h"
  44
  45 #ifdef __WITH_X509__
  46 #include "crlresource.h"
  47 #endif // WITH_X509__
  48
  49 #define TAG "SRPAPI"
  50
  51 /**
  52  * Macro to verify argument is not equal to NULL.
  53  * eg: VERIFY_NON_NULL(TAG, ptrData, ERROR,OC_STACK_ERROR);
  54  */
  55 #define VERIFY_NON_NULL(tag, arg, logLevel, retValue) { if (NULL == (arg)) \
  56             { OIC_LOG((logLevel), tag, #arg " is NULL"); return retValue; } }
  57
  58 /**
  59  * Macro to verify success of operation.
  60  * eg: VERIFY_SUCCESS(TAG, OC_STACK_OK == foo(), ERROR, OC_STACK_ERROR);
  61  */
  62 #define VERIFY_SUCCESS(tag, op, logLevel, retValue) { if (!(op)) \
  63             {OIC_LOG((logLevel), tag, #op " failed!!"); return retValue;} }
  64
  65 /**
  66  * Structure to carry credential data to callback.
  67  */
  68 typedef struct CredentialData CredentialData_t;
  69 struct CredentialData
  70 {
  71     void *ctx;                                  /**< Pointer to user context.**/
  72     const OCProvisionDev_t *deviceInfo1;        /**< Pointer to OCProvisionDev_t.**/
  73     const OCProvisionDev_t *deviceInfo2;        /**< Pointer to OCProvisionDev_t.**/
  74     OicSecCred_t *credInfo;                     /**< Pointer to OicSecCred_t.**/
  75     OicSecCred_t *credInfoFirst;                /**< Pointer to OicSecCred_t.**/
  76     OCProvisionResultCB resultCallback;         /**< Pointer to result callback.**/
  77     OCProvisionResult_t *resArr;                /**< Result array.**/
  78     int numOfResults;                           /**< Number of results in result array.**/
  79 };
  80
  81 /**
  82  * Structure to carry ACL provision API data to callback.
  83  */
  84 typedef struct ACLData ACLData_t;
  85 struct ACLData
  86 {
  87     void *ctx;                                  /**< Pointer to user context.**/
  88     const OCProvisionDev_t *deviceInfo;         /**< Pointer to PMDevInfo_t.**/
  89     OCProvisionResultCB resultCallback;         /**< Pointer to result callback.**/
  90     OCProvisionResult_t *resArr;                /**< Result array.**/
  91     int numOfResults;                           /**< Number of results in result array.**/
  92 };
  93
  94 /**
  95  * Structure to carry PCONF provision API data to callback.
  96  */
  97 typedef struct PconfData PconfData_t;
  98 struct PconfData
  99 {
 100     void *ctx;                                  /**< Pointer to user context.**/
 101     const OCProvisionDev_t *deviceInfo;         /**< Pointer to PMDevInfo_t.**/
 102     OCProvisionResultCB resultCallback;         /**< Pointer to result callback.**/
 103     OCProvisionResult_t *resArr;                /**< Result array.**/
 104     int numOfResults;                           /**< Number of results in result array.**/
 105 };
 106
 107 // Enum type index for unlink callback.
 108 typedef enum {
 109     IDX_FIRST_DEVICE_RES = 0, // index for resulf of the first device
 110     IDX_SECOND_DEVICE_RES,    // index for result of the second device
 111     IDX_DB_UPDATE_RES         // index for result of updating provisioning database.
 112 } IdxUnlinkRes_t;
 113
 114 // Structure to carry unlink APIs data to callback.
 115 typedef struct UnlinkData UnlinkData_t;
 116 struct UnlinkData {
 117     void *ctx;
 118     OCProvisionDev_t* unlinkDev;             /**< Pointer to OCProvisionDev_t to be unlinked.**/
 119     OCProvisionResult_t* unlinkRes;          /**< Result array.**/
 120     OCProvisionResultCB resultCallback;      /**< Pointer to result callback.**/
 121     int numOfResults;                        /**< Number of results in result array.**/
 122 };
 123
 124 //Example of DELETE cred request -> coaps://0.0.0.0:5684/oic/sec/cred?sub=(BASE64 ENCODED UUID)
 125 const char * SRP_FORM_DELETE_CREDENTIAL = "coaps://[%s]:%d%s?%s=%s";
 126
 127 // Structure to carry remove APIs data to callback.
 128 typedef struct RemoveData RemoveData_t;
 129 struct RemoveData {
 130     void *ctx;
 131     OCProvisionDev_t* revokeTargetDev;      /**< Device which is going to be revoked..**/
 132     OCProvisionDev_t* linkedDevList;        /**< A list of devices which have invalid credential.**/
 133     OCProvisionResult_t* removeRes;         /**< Result array.**/
 134     OCProvisionResultCB resultCallback;     /**< Pointer to result callback.**/
 135     size_t numOfResults;                    /**< Number of results in result array.**/
 136     size_t sizeOfResArray;
 137     bool hasError;
 138 };
 139
 140 /**
 141  * Function prototype
 142  */
 143 static OCStackResult provisionCredentials(const OicSecCred_t *cred,
 144         const OCProvisionDev_t *deviceInfo, CredentialData_t *credData,
 145         OCClientResponseHandler responseHandler);
 146
 147
 148 /**
 149  * Internal function to update result in result array.
 150  */
 151 static void registerResultForCredProvisioning(CredentialData_t *credData,
 152                                               OCStackResult stackresult, int cause)
 153 {
 154
 155    OIC_LOG_V(INFO,TAG,"value of credData->numOfResults is %d",credData->numOfResults);
 156    if(1 == cause)
 157    {
 158        memcpy(credData->resArr[(credData->numOfResults)].deviceId.id,
 159               credData->deviceInfo1->doxm->deviceID.id,UUID_LENGTH);
 160    }
 161    else
 162    {
 163        memcpy(credData->resArr[(credData->numOfResults)].deviceId.id,
 164               credData->deviceInfo2->doxm->deviceID.id,UUID_LENGTH);
 165    }
 166    credData->resArr[(credData->numOfResults)].res = stackresult;
 167    ++(credData->numOfResults);
 168 }
 169
 170 /**
 171  * Callback handler for handling callback of provisioning device 2.
 172  *
 173  * @param[in] ctx             ctx value passed to callback from calling function.
 174  * @param[in] UNUSED          handle to an invocation
 175  * @param[in] clientResponse  Response from queries to remote servers.
 176  * @return  OC_STACK_DELETE_TRANSACTION to delete the transaction
 177  *          and  OC_STACK_KEEP_TRANSACTION to keep it.
 178  */
 179 static OCStackApplicationResult provisionCredentialCB2(void *ctx, OCDoHandle UNUSED,
 180                                                        OCClientResponse *clientResponse)
 181 {
 182     VERIFY_NON_NULL(TAG, ctx, ERROR, OC_STACK_DELETE_TRANSACTION);
 183     CredentialData_t *credData = (CredentialData_t *) ctx;
 184     (void)UNUSED;
 185
 186     OCProvisionResultCB resultCallback = credData->resultCallback;
 187     OIC_LOG(INFO, TAG, "provisionCredentialCB2 called");
 188     if (clientResponse)
 189     {
 190         if(OC_STACK_RESOURCE_CREATED == clientResponse->result)
 191         {
 192             registerResultForCredProvisioning(credData, OC_STACK_RESOURCE_CREATED, 2);
 193             OCStackResult res =  PDMLinkDevices(&credData->deviceInfo1->doxm->deviceID,
 194                     &credData->deviceInfo2->doxm->deviceID);
 195             if (OC_STACK_OK != res)
 196             {
 197                 OIC_LOG(ERROR, TAG, "Error occured on PDMLinkDevices");
 198                 return OC_STACK_DELETE_TRANSACTION;
 199             }
 200             OIC_LOG(INFO, TAG, "Link created successfully");
 201
 202             ((OCProvisionResultCB)(resultCallback))(credData->ctx, credData->numOfResults,
 203                                                     credData->resArr,
 204                                                     false);
 205              OICFree(credData->resArr);
 206              OICFree(credData);
 207              return OC_STACK_DELETE_TRANSACTION;
 208         }
 209
 210     }
 211     OIC_LOG(INFO, TAG, "provisionCredentialCB2 received Null clientResponse");
 212     registerResultForCredProvisioning(credData, OC_STACK_ERROR, 2);
 213     ((OCProvisionResultCB)(resultCallback))(credData->ctx, credData->numOfResults,
 214                                             credData->resArr,
 215                                             true);
 216     OICFree(credData->resArr);
 217     OICFree(credData);
 218     return OC_STACK_DELETE_TRANSACTION;
 219 }
 220
 221 /**
 222  * Callback handler for handling callback of provisioning device 1.
 223  *
 224  * @param[in] ctx             ctx value passed to callback from calling function.
 225  * @param[in] UNUSED          handle to an invocation
 226  * @param[in] clientResponse  Response from queries to remote servers.
 227  * @return  OC_STACK_DELETE_TRANSACTION to delete the transaction
 228  *          and  OC_STACK_KEEP_TRANSACTION to keep it.
 229  */
 230 static OCStackApplicationResult provisionCredentialCB1(void *ctx, OCDoHandle UNUSED,
 231                                                        OCClientResponse *clientResponse)
 232 {
 233     VERIFY_NON_NULL(TAG, ctx, ERROR, OC_STACK_DELETE_TRANSACTION);
 234     (void)UNUSED;
 235     CredentialData_t* credData = (CredentialData_t*) ctx;
 236     OICFree(credData->credInfoFirst);
 237     const OCProvisionDev_t *deviceInfo = credData->deviceInfo2;
 238     OicSecCred_t *credInfo = credData->credInfo;
 239     const OCProvisionResultCB resultCallback = credData->resultCallback;
 240     if (clientResponse)
 241     {
 242         if (OC_STACK_RESOURCE_CREATED == clientResponse->result)
 243         {
 244             // send credentials to second device
 245             registerResultForCredProvisioning(credData, OC_STACK_RESOURCE_CREATED,1);
 246             OCStackResult res = provisionCredentials(credInfo, deviceInfo, credData,
 247                     provisionCredentialCB2);
 248             DeleteCredList(credInfo);
 249             if (OC_STACK_OK != res)
 250             {
 251                 registerResultForCredProvisioning(credData, res,2);
 252                 ((OCProvisionResultCB)(resultCallback))(credData->ctx, credData->numOfResults,
 253                                                         credData->resArr,
 254                                                         true);
 255                 OICFree(credData->resArr);
 256                 OICFree(credData);
 257                 credData = NULL;
 258             }
 259         }
 260         else
 261         {
 262             registerResultForCredProvisioning(credData, OC_STACK_ERROR,1);
 263             ((OCProvisionResultCB)(resultCallback))(credData->ctx, credData->numOfResults,
 264                                                     credData->resArr,
 265                                                     true);
 266             OICFree(credData->resArr);
 267             OICFree(credData);
 268             credData = NULL;
 269         }
 270     }
 271     else
 272     {
 273         OIC_LOG(INFO, TAG, "provisionCredentialCB received Null clientResponse for first device");
 274         registerResultForCredProvisioning(credData, OC_STACK_ERROR,1);
 275        ((OCProvisionResultCB)(resultCallback))(credData->ctx, credData->numOfResults,
 276                                                      credData->resArr,
 277                                                      true);
 278         DeleteCredList(credInfo);
 279         OICFree(credData->resArr);
 280         OICFree(credData);
 281         credData = NULL;
 282     }
 283     return OC_STACK_DELETE_TRANSACTION;
 284 }
 285
 286
 287
 288 /**
 289  * Internal function for handling credential generation and sending credential to resource server.
 290  *
 291  * @param[in] cred Instance of cred resource.
 292  * @param[in] deviceInfo information about device to which credential is to be provisioned.
 293  * @param[in] responseHandler callbak called by OC stack when request API receives response.
 294  * @return  OC_STACK_OK in case of success and other value otherwise.
 295  */
 296 static OCStackResult provisionCredentials(const OicSecCred_t *cred,
 297         const OCProvisionDev_t *deviceInfo, CredentialData_t *credData,
 298         OCClientResponseHandler responseHandler)
 299 {
 300     OCSecurityPayload* secPayload = (OCSecurityPayload*)OICCalloc(1, sizeof(OCSecurityPayload));
 301     if (!secPayload)
 302     {
 303         OIC_LOG(ERROR, TAG, "Failed to memory allocation");
 304         return OC_STACK_NO_MEMORY;
 305     }
 306     secPayload->base.type = PAYLOAD_TYPE_SECURITY;
 307     OCStackResult res = CredToCBORPayload(cred, &secPayload->securityData1, &secPayload->payloadSize);
 308     if((OC_STACK_OK != res) && (NULL == secPayload->securityData1))
 309     {
 310         OCPayloadDestroy((OCPayload *)secPayload);
 311         OIC_LOG(ERROR, TAG, "Failed to CredToCBORPayload");
 312         return OC_STACK_NO_MEMORY;
 313     }
 314
 315     OIC_LOG_V(INFO, TAG, "Credential for provisioning : %s",secPayload->securityData1);
 316     char query[MAX_URI_LENGTH + MAX_QUERY_LENGTH] = {0};
 317     if(!PMGenerateQuery(true,
 318                         deviceInfo->endpoint.addr,
 319                         deviceInfo->securePort,
 320                         deviceInfo->connType,
 321                         query, sizeof(query), OIC_RSRC_CRED_URI))
 322     {
 323         OIC_LOG(ERROR, TAG, "DeviceDiscoveryHandler : Failed to generate query");
 324         return OC_STACK_ERROR;
 325     }
 326     OIC_LOG_V(DEBUG, TAG, "Query=%s", query);
 327
 328     OCCallbackData cbData = {.context=NULL, .cb=NULL, .cd=NULL};
 329     cbData.cb = responseHandler;
 330     cbData.context = (void *) credData;
 331     cbData.cd = NULL;
 332
 333     OCDoHandle handle = NULL;
 334     OCMethod method = OC_REST_POST;
 335     OCStackResult ret = OCDoResource(&handle, method, query, 0, (OCPayload*)secPayload,
 336             deviceInfo->connType, OC_HIGH_QOS, &cbData, NULL, 0);
 337     OIC_LOG_V(INFO, TAG, "OCDoResource::Credential provisioning returned : %d",ret);
 338     if (ret != OC_STACK_OK)
 339     {
 340         OIC_LOG(ERROR, TAG, "OCStack resource error");
 341         return ret;
 342     }
 343     return OC_STACK_OK;
 344 }
 345
 346 #ifdef __WITH_X509__
 347 /**
 348  * Structure to carry certificate data to callback.
 349  */
 350 typedef struct CertificateData CertData_t;
 351 struct CertificateData
 352 {
 353     void *ctx;                                  /**< Pointer to user context.**/
 354     const OCProvisionDev_t *deviceInfo;        /**< Pointer to OCProvisionDev_t.**/
 355     OicSecCred_t *credInfo;                     /**< Pointer to OicSecCred_t.**/
 356     OCProvisionResultCB resultCallback;         /**< Pointer to result callback.**/
 357     OCProvisionResult_t *resArr;                /**< Result array.**/
 358     int numOfResults;                           /**< Number of results in result array.**/
 359 };
 360
 361 /**
 362  * Structure to carry CRL provision API data to callback.
 363  */
 364 typedef struct CRLData CRLData_t;
 365 struct CRLData
 366 {
 367     void *ctx;                                  /**< Pointer to user context.**/
 368     const OCProvisionDev_t *deviceInfo;         /**< Pointer to PMDevInfo_t.**/
 369     OCProvisionResultCB resultCallback;         /**< Pointer to result callback.**/
 370     OCProvisionResult_t *resArr;                /**< Result array.**/
 371     int numOfResults;                           /**< Number of results in result array.**/
 372 };
 373
 374 /**
 375  * Internal function to update result in result array.
 376  */
 377 static void registerResultForCertProvisioning(CertData_t *certData,
 378                                               OCStackResult stackresult)
 379 {
 380
 381    OIC_LOG_V(INFO,TAG,"value of credData->numOfResults is %d",certData->numOfResults);
 382    memcpy(certData->resArr[(certData->numOfResults)].deviceId.id,
 383           certData->deviceInfo->doxm->deviceID.id,UUID_LENGTH);
 384    certData->resArr[(certData->numOfResults)].res = stackresult;
 385    ++(certData->numOfResults);
 386 }
 387
 388 /**
 389  * Internal Function to store results in result array during ACL provisioning.
 390  */
 391 static void registerResultForCRLProvisioning(CRLData_t *crlData,
 392                                              OCStackResult stackresult)
 393 {
 394    OIC_LOG_V(INFO, TAG, "Inside registerResultForCRLProvisioning crlData->numOfResults is %d\n",
 395                        crlData->numOfResults);
 396    memcpy(crlData->resArr[(crlData->numOfResults)].deviceId.id,
 397           crlData->deviceInfo->doxm->deviceID.id, UUID_LENGTH);
 398    crlData->resArr[(crlData->numOfResults)].res = stackresult;
 399    ++(crlData->numOfResults);
 400 }
 401
 402
 403 /**
 404  * Callback handler of SRPProvisionCRL.
 405  *
 406  * @param[in] ctx             ctx value passed to callback from calling function.
 407  * @param[in] UNUSED          handle to an invocation
 408  * @param[in] clientResponse  Response from queries to remote servers.
 409  * @return  OC_STACK_DELETE_TRANSACTION to delete the transaction
 410  *          and  OC_STACK_KEEP_TRANSACTION to keep it.
 411  */
 412 static OCStackApplicationResult SRPProvisionCRLCB(void *ctx, OCDoHandle UNUSED,
 413                                                   OCClientResponse *clientResponse)
 414 {
 415     OIC_LOG_V(INFO, TAG, "Inside SRPProvisionCRLCB.");
 416     (void)UNUSED;
 417     VERIFY_NON_NULL(TAG, ctx, ERROR, OC_STACK_DELETE_TRANSACTION);
 418     CRLData_t *crlData = (CRLData_t*)ctx;
 419     OCProvisionResultCB resultCallback = crlData->resultCallback;
 420
 421     if (clientResponse)
 422     {
 423         if(OC_STACK_RESOURCE_CREATED == clientResponse->result)
 424         {
 425             registerResultForCRLProvisioning(crlData, OC_STACK_RESOURCE_CREATED);
 426             ((OCProvisionResultCB)(resultCallback))(crlData->ctx, crlData->numOfResults,
 427                                                     crlData->resArr,
 428                                                     false);
 429              OICFree(crlData->resArr);
 430              OICFree(crlData);
 431              return OC_STACK_DELETE_TRANSACTION;
 432         }
 433     }
 434     registerResultForCRLProvisioning(crlData, OC_STACK_ERROR);
 435     ((OCProvisionResultCB)(resultCallback))(crlData->ctx, crlData->numOfResults,
 436                                             crlData->resArr,
 437                                             true);
 438     OIC_LOG_V(ERROR, TAG, "SRPProvisionCRLCB received Null clientResponse");
 439     OICFree(crlData->resArr);
 440     OICFree(crlData);
 441     return OC_STACK_DELETE_TRANSACTION;
 442 }
 443
 444 OCStackResult SRPProvisionCRL(void *ctx, const OCProvisionDev_t *selectedDeviceInfo,
 445         OicSecCrl_t *crl, OCProvisionResultCB resultCallback)
 446 {
 447     VERIFY_NON_NULL(TAG, selectedDeviceInfo, ERROR,  OC_STACK_INVALID_PARAM);
 448     VERIFY_NON_NULL(TAG, crl, ERROR,  OC_STACK_INVALID_PARAM);
 449     VERIFY_NON_NULL(TAG, resultCallback, ERROR,  OC_STACK_INVALID_CALLBACK);
 450
 451     OCSecurityPayload* secPayload = (OCSecurityPayload*)OICCalloc(1, sizeof(OCSecurityPayload));
 452     if (!secPayload)
 453     {
 454         OIC_LOG(ERROR, TAG, "Failed to memory allocation");
 455         return OC_STACK_NO_MEMORY;
 456     }
 457
 458     secPayload->base.type = PAYLOAD_TYPE_SECURITY;
 459     OCStackResult res = CrlToCBORPayload(crl, &secPayload->securityData1, &secPayload->payloadSize);
 460     if((OC_STACK_OK != res) && (NULL == secPayload->securityData1))
 461     {
 462         OICFree(secPayload);
 463         OIC_LOG(ERROR, TAG, "Failed to BinToCrlJSON");
 464         return OC_STACK_NO_MEMORY;
 465     }
 466     OIC_LOG_V(INFO, TAG, "CRL : %s", secPayload->securityData1);
 467
 468     char query[MAX_URI_LENGTH + MAX_QUERY_LENGTH] = {0};
 469     if(!PMGenerateQuery(true,
 470                         selectedDeviceInfo->endpoint.addr,
 471                         selectedDeviceInfo->securePort,
 472                         selectedDeviceInfo->connType,
 473                         query, sizeof(query), OIC_RSRC_CRL_URI))
 474     {
 475         OIC_LOG(ERROR, TAG, "DeviceDiscoveryHandler : Failed to generate query");
 476         OCPayloadDestroy((OCPayload *)secPayload);
 477         return OC_STACK_ERROR;
 478     }
 479     OIC_LOG_V(DEBUG, TAG, "Query=%s", query);
 480
 481     OCCallbackData cbData =  {.context=NULL, .cb=NULL, .cd=NULL};
 482     cbData.cb = &SRPProvisionCRLCB;
 483     CRLData_t *crlData = (CRLData_t *) OICCalloc(1, sizeof(CRLData_t));
 484     if (crlData == NULL)
 485     {
 486         OCPayloadDestroy((OCPayload *)secPayload);
 487         OIC_LOG(ERROR, TAG, "Unable to allocate memory");
 488         return OC_STACK_NO_MEMORY;
 489     }
 490
 491     crlData->deviceInfo = selectedDeviceInfo;
 492     crlData->resultCallback = resultCallback;
 493     crlData->numOfResults=0;
 494     crlData->ctx = ctx;
 495
 496     crlData->resArr = (OCProvisionResult_t*)OICCalloc(1, sizeof(OCProvisionResult_t));
 497     if (crlData->resArr == NULL)
 498     {
 499         OCPayloadDestroy((OCPayload *)secPayload);
 500         OIC_LOG(ERROR, TAG, "Unable to allocate memory");
 501         return OC_STACK_NO_MEMORY;
 502     }
 503
 504     cbData.context = (void *)crlData;
 505     cbData.cd = NULL;
 506     OCMethod method = OC_REST_POST;
 507     OCDoHandle handle = NULL;
 508     OIC_LOG(DEBUG, TAG, "Sending CRL info to resource server");
 509
 510     OCStackResult ret = OCDoResource(&handle, method, query,
 511             &selectedDeviceInfo->endpoint, (OCPayload*)secPayload,
 512             selectedDeviceInfo->connType, OC_HIGH_QOS, &cbData, NULL, 0);
 513
 514     if (ret != OC_STACK_OK)
 515     {
 516         OICFree(crlData->resArr);
 517         OICFree(crlData);
 518     }
 519
 520     return ret;
 521 }
 522
 523 /**
 524  * Internal function for handling credential generation and sending cretificate credential.
 525  *
 526  * @param[in] cred Instance of cred resource.
 527  * @param[in] deviceInfo information about device to which credential is to be provisioned.
 528  * @param[in] responseHandler callbak called by OC stack when request API receives response.
 529  * @return  OC_STACK_OK in case of success and other value otherwise.
 530  */
 531 static OCStackResult provisionCertCred(const OicSecCred_t *cred,
 532         const OCProvisionDev_t *deviceInfo, CertData_t *certData,
 533         OCClientResponseHandler responseHandler)
 534 {
 535     OCSecurityPayload* secPayload = (OCSecurityPayload*)OICCalloc(1, sizeof(OCSecurityPayload));
 536     if(!secPayload)
 537     {
 538         OIC_LOG(ERROR, TAG, "Failed to memory allocation");
 539         return OC_STACK_NO_MEMORY;
 540     }
 541     secPayload->base.type = PAYLOAD_TYPE_SECURITY;
 542     OCStackResult res = CredToCBORPayload(cred, &secPayload->securityData1,
 543         &secPayload->payloadSize);
 544
 545     if ((OC_STACK_OK != res) || (NULL == secPayload->securityData1))
 546     {
 547         OICFree(secPayload);
 548         OIC_LOG(ERROR, TAG, "Failed to CredToCBORPayload");
 549         return OC_STACK_NO_MEMORY;
 550     }
 551
 552     OIC_LOG_V(INFO, TAG, "Credential for provisioning : %s",secPayload->securityData1);
 553     char query[MAX_URI_LENGTH + MAX_QUERY_LENGTH] = {0};
 554     if(!PMGenerateQuery(true,
 555                         deviceInfo->endpoint.addr,
 556                         deviceInfo->securePort,
 557                         deviceInfo->connType,
 558                         query, sizeof(query), OIC_RSRC_CRED_URI))
 559     {
 560         OIC_LOG(ERROR, TAG, "DeviceDiscoveryHandler : Failed to generate query");
 561         OCPayloadDestroy((OCPayload *)secPayload);
 562         return OC_STACK_ERROR;
 563     }
 564     OIC_LOG_V(DEBUG, TAG, "Query=%s", query);
 565
 566     OCCallbackData cbData = {.context=NULL, .cb=NULL, .cd=NULL};
 567     cbData.cb = responseHandler;
 568     cbData.context = (void *) certData;
 569     cbData.cd = NULL;
 570
 571     OCDoHandle handle = NULL;
 572     OCMethod method = OC_REST_POST;
 573     OCStackResult ret = OCDoResource(&handle, method, query, 0, (OCPayload*)secPayload,
 574             deviceInfo->connType, OC_HIGH_QOS, &cbData, NULL, 0);
 575     OIC_LOG_V(INFO, TAG, "OCDoResource::Certificate provisioning returned : %d",ret);
 576     if (ret != OC_STACK_OK)
 577     {
 578         OIC_LOG(ERROR, TAG, "OCStack resource error");
 579     }
 580
 581     return ret;
 582 }
 583
 584 /**
 585  * Callback handler for handling callback of certificate provisioning device.
 586  *
 587  * @param[in] ctx             ctx value passed to callback from calling function.
 588  * @param[in] UNUSED          handle to an invocation
 589  * @param[in] clientResponse  Response from queries to remote servers.
 590  * @return  OC_STACK_DELETE_TRANSACTION to delete the transaction
 591  *          and  OC_STACK_KEEP_TRANSACTION to keep it.
 592  */
 593 static OCStackApplicationResult provisionCertCB(void *ctx, OCDoHandle UNUSED,
 594                                                        OCClientResponse *clientResponse)
 595 {
 596     VERIFY_NON_NULL(TAG, ctx, ERROR, OC_STACK_DELETE_TRANSACTION);
 597     CertData_t *certData = (CertData_t *) ctx;
 598     (void)UNUSED;
 599
 600     OCProvisionResultCB resultCallback = certData->resultCallback;
 601     OIC_LOG(INFO, TAG, "provisionCertCred called");
 602     if (clientResponse)
 603     {
 604         if(OC_STACK_RESOURCE_CREATED == clientResponse->result)
 605         {
 606             registerResultForCertProvisioning(certData, OC_STACK_RESOURCE_CREATED);
 607             ((OCProvisionResultCB)(resultCallback))(certData->ctx, certData->numOfResults,
 608                                                     certData->resArr,
 609                                                     false);
 610              OICFree(certData->resArr);
 611              OICFree(certData);
 612              return OC_STACK_DELETE_TRANSACTION;
 613         }
 614
 615     }
 616     OIC_LOG(INFO, TAG, "provisionCertCredCB received Null clientResponse");
 617     registerResultForCertProvisioning(certData, OC_STACK_ERROR);
 618     ((OCProvisionResultCB)(resultCallback))(certData->ctx, certData->numOfResults,
 619                                             certData->resArr,
 620                                             true);
 621     OICFree(certData->resArr);
 622     OICFree(certData);
 623     return OC_STACK_DELETE_TRANSACTION;
 624 }
 625 #endif // __WITH_X509__
 626
 627 OCStackResult SRPProvisionCredentials(void *ctx, OicSecCredType_t type, size_t keySize,
 628                                       const OCProvisionDev_t *pDev1,
 629                                       const OCProvisionDev_t *pDev2,
 630                                       OCProvisionResultCB resultCallback)
 631 {
 632     VERIFY_NON_NULL(TAG, pDev1, ERROR,  OC_STACK_INVALID_PARAM);
 633     if (SYMMETRIC_PAIR_WISE_KEY == type)
 634     {
 635         VERIFY_NON_NULL(TAG, pDev2, ERROR,  OC_STACK_INVALID_PARAM);
 636     }
 637     VERIFY_NON_NULL(TAG, resultCallback, ERROR,  OC_STACK_INVALID_CALLBACK);
 638
 639     if (SYMMETRIC_PAIR_WISE_KEY == type &&
 640        !(OWNER_PSK_LENGTH_128 == keySize || OWNER_PSK_LENGTH_256 == keySize))
 641     {
 642         OIC_LOG(INFO, TAG, "Invalid key size");
 643         return OC_STACK_INVALID_PARAM;
 644     }
 645
 646     OIC_LOG(INFO, TAG, "In SRPProvisionCredentials");
 647
 648     if (SYMMETRIC_PAIR_WISE_KEY == type)
 649     {
 650         bool linkExisits = true;
 651         OCStackResult res = PDMIsLinkExists(&pDev1->doxm->deviceID, &pDev2->doxm->deviceID, &linkExisits);
 652
 653         if (res != OC_STACK_OK)
 654         {
 655             OIC_LOG(ERROR, TAG, "Internal error occured");
 656             return res;
 657         }
 658         if (linkExisits)
 659         {
 660             OIC_LOG(ERROR, TAG, "Link already exists");
 661             return OC_STACK_INVALID_PARAM;
 662         }
 663     }
 664
 665     OicUuid_t provTooldeviceID =   {{0,}};
 666     if (OC_STACK_OK != GetDoxmDeviceID(&provTooldeviceID))
 667     {
 668         OIC_LOG(ERROR, TAG, "Error while retrieving provisioning tool's device ID");
 669         return OC_STACK_ERROR;
 670     }
 671     OIC_LOG(INFO, TAG, "retrieved deviceid");
 672     switch (type)
 673     {
 674         case SYMMETRIC_PAIR_WISE_KEY:
 675         {
 676             const OCProvisionDev_t *firstDevice = pDev1;
 677             const OCProvisionDev_t *secondDevice = pDev2;
 678
 679             OicSecCred_t *firstCred = NULL;
 680             OicSecCred_t *secondCred = NULL;
 681             OCStackResult res = PMGeneratePairWiseCredentials(type, keySize, &provTooldeviceID,
 682                     &firstDevice->doxm->deviceID, &secondDevice->doxm->deviceID,
 683                     &firstCred, &secondCred);
 684             VERIFY_SUCCESS(TAG, (res==OC_STACK_OK), ERROR, OC_STACK_ERROR);
 685             OIC_LOG(INFO, TAG, "Credentials generated successfully");
 686             CredentialData_t *credData =
 687                 (CredentialData_t *) OICCalloc(1, sizeof(CredentialData_t));
 688             if (NULL == credData)
 689             {
 690                 OICFree(firstCred);
 691                 OICFree(secondCred);
 692                 OIC_LOG(ERROR, TAG, "Memory allocation problem");
 693                 return OC_STACK_NO_MEMORY;
 694             }
 695             credData->deviceInfo1 = firstDevice;
 696             credData->deviceInfo2 = secondDevice;
 697             credData->credInfo = secondCred;
 698             credData->ctx = ctx;
 699             credData->credInfoFirst = firstCred;
 700             credData->numOfResults = 0;
 701             credData->resultCallback = resultCallback;
 702             // first call to provision creds to device1.
 703             // second call to provision creds to device2.
 704             int noOfRiCalls = 2;
 705             credData->resArr =
 706                 (OCProvisionResult_t*)OICCalloc(noOfRiCalls, sizeof(OCProvisionResult_t));
 707             if (NULL == credData->resArr)
 708             {
 709                 OICFree(firstCred);
 710                 OICFree(secondCred);
 711                 OICFree(credData);
 712                 OIC_LOG(ERROR, TAG, "Memory allocation problem");
 713                 return OC_STACK_NO_MEMORY;
 714             }
 715             res = provisionCredentials(firstCred, firstDevice, credData, &provisionCredentialCB1);
 716             if (OC_STACK_OK != res)
 717             {
 718                 DeleteCredList(firstCred);
 719                 DeleteCredList(secondCred);
 720                 OICFree(credData->resArr);
 721                 OICFree(credData);
 722             }
 723             OIC_LOG_V(INFO, TAG, "provisionCredentials returned: %d",res);
 724             VERIFY_SUCCESS(TAG, (res==OC_STACK_OK), ERROR, OC_STACK_ERROR);
 725             return res;
 726         }
 727 #ifdef __WITH_X509__
 728         case SIGNED_ASYMMETRIC_KEY:
 729         {
 730             const OCProvisionDev_t *firstDevice = pDev1;
 731             OicSecCred_t *cred = NULL;
 732             OCStackResult res = PMGenerateCertificateCredentials(&provTooldeviceID,
 733                                                                 &firstDevice->doxm->deviceID,&cred);
 734             VERIFY_SUCCESS(TAG, (res==OC_STACK_OK), ERROR, OC_STACK_ERROR);
 735             OIC_LOG(INFO, TAG, "Certificate credentials generated successfully");
 736             CertData_t *certData = (CertData_t *) OICCalloc(1, sizeof(CertData_t));
 737             if (NULL == certData)
 738             {
 739                 OICFree(cred);
 740                 OIC_LOG(ERROR, TAG, "Memory allocation problem");
 741                 return OC_STACK_NO_MEMORY;
 742             }
 743
 744             certData->deviceInfo = firstDevice;
 745             certData->ctx = ctx;
 746             certData->credInfo = cred;
 747             certData->numOfResults = 0;
 748             certData->resultCallback = resultCallback;
 749
 750             certData->resArr = (OCProvisionResult_t*)OICCalloc(1, sizeof(OCProvisionResult_t));
 751             if (NULL == certData->resArr)
 752             {
 753                 DeleteCredList(cred);
 754                 OICFree(certData);
 755                 OIC_LOG(ERROR, TAG, "Memory allocation problem");
 756                 return OC_STACK_NO_MEMORY;
 757             }
 758
 759             res = provisionCertCred(cred, firstDevice, certData, &provisionCertCB);
 760             if (OC_STACK_OK != res)
 761             {
 762                 OICFree(certData->resArr);
 763                 OICFree(certData);
 764             }
 765             DeleteCredList(cred);
 766             OIC_LOG_V(INFO, TAG, "provisionCertCredentials returned: %d",res);
 767
 768             return res;
 769         }
 770 #endif
 771         default:
 772         {
 773             OIC_LOG(ERROR, TAG, "Invalid option.");
 774             return OC_STACK_INVALID_PARAM;
 775         }
 776     }
 777     return OC_STACK_ERROR;
 778 }
 779
 780 /**
 781  * Internal Function to store results in result array during ACL provisioning.
 782  */
 783 static void registerResultForACLProvisioning(ACLData_t *aclData,
 784                                              OCStackResult stackresult)
 785 {
 786    OIC_LOG_V(INFO, TAG, "Inside registerResultForACLProvisioning aclData->numOfResults is %d\n",
 787                        aclData->numOfResults);
 788    memcpy(aclData->resArr[(aclData->numOfResults)].deviceId.id,
 789           aclData->deviceInfo->doxm->deviceID.id, UUID_LENGTH);
 790    aclData->resArr[(aclData->numOfResults)].res = stackresult;
 791    ++(aclData->numOfResults);
 792 }
 793
 794 /**
 795  * Callback handler of SRPProvisionACL.
 796  *
 797  * @param[in] ctx             ctx value passed to callback from calling function.
 798  * @param[in] UNUSED          handle to an invocation
 799  * @param[in] clientResponse  Response from queries to remote servers.
 800  * @return  OC_STACK_DELETE_TRANSACTION to delete the transaction
 801  *          and  OC_STACK_KEEP_TRANSACTION to keep it.
 802  */
 803 static OCStackApplicationResult SRPProvisionACLCB(void *ctx, OCDoHandle UNUSED,
 804                                                   OCClientResponse *clientResponse)
 805 {
 806     OIC_LOG_V(INFO, TAG, "Inside SRPProvisionACLCB.");
 807     (void)UNUSED;
 808     VERIFY_NON_NULL(TAG, ctx, ERROR, OC_STACK_DELETE_TRANSACTION);
 809     ACLData_t *aclData = (ACLData_t*)ctx;
 810     OCProvisionResultCB resultCallback = aclData->resultCallback;
 811
 812     if (clientResponse)
 813     {
 814         if(OC_STACK_RESOURCE_CREATED == clientResponse->result)
 815         {
 816             registerResultForACLProvisioning(aclData, OC_STACK_RESOURCE_CREATED);
 817             ((OCProvisionResultCB)(resultCallback))(aclData->ctx, aclData->numOfResults,
 818                                                     aclData->resArr,
 819                                                     false);
 820              OICFree(aclData->resArr);
 821              OICFree(aclData);
 822              return OC_STACK_DELETE_TRANSACTION;
 823         }
 824     }
 825     registerResultForACLProvisioning(aclData, OC_STACK_ERROR);
 826     ((OCProvisionResultCB)(resultCallback))(aclData->ctx, aclData->numOfResults,
 827                                             aclData->resArr,
 828                                             true);
 829     OIC_LOG_V(ERROR, TAG, "SRPProvisionACLCB received Null clientResponse");
 830     OICFree(aclData->resArr);
 831     OICFree(aclData);
 832     return OC_STACK_DELETE_TRANSACTION;
 833 }
 834
 835 OCStackResult SRPProvisionACL(void *ctx, const OCProvisionDev_t *selectedDeviceInfo,
 836         OicSecAcl_t *acl, OCProvisionResultCB resultCallback)
 837 {
 838     VERIFY_NON_NULL(TAG, selectedDeviceInfo, ERROR,  OC_STACK_INVALID_PARAM);
 839     VERIFY_NON_NULL(TAG, acl, ERROR,  OC_STACK_INVALID_PARAM);
 840     VERIFY_NON_NULL(TAG, resultCallback, ERROR,  OC_STACK_INVALID_CALLBACK);
 841
 842     OCSecurityPayload* secPayload = (OCSecurityPayload*)OICCalloc(1, sizeof(OCSecurityPayload));
 843     if(!secPayload)
 844     {
 845         OIC_LOG(ERROR, TAG, "Failed to memory allocation");
 846         return OC_STACK_NO_MEMORY;
 847     }
 848     secPayload->base.type = PAYLOAD_TYPE_SECURITY;
 849     if(OC_STACK_OK != AclToCBORPayload(acl, &secPayload->securityData1, &secPayload->payloadSize))
 850     {
 851         OCPayloadDestroy((OCPayload *)secPayload);
 852         OIC_LOG(ERROR, TAG, "Failed to AclToCBORPayload");
 853         return OC_STACK_NO_MEMORY;
 854     }
 855     char query[MAX_URI_LENGTH + MAX_QUERY_LENGTH] = {0};
 856     if(!PMGenerateQuery(true,
 857                         selectedDeviceInfo->endpoint.addr,
 858                         selectedDeviceInfo->securePort,
 859                         selectedDeviceInfo->connType,
 860                         query, sizeof(query), OIC_RSRC_ACL_URI))
 861     {
 862         OIC_LOG(ERROR, TAG, "DeviceDiscoveryHandler : Failed to generate query");
 863         return OC_STACK_ERROR;
 864     }
 865     OIC_LOG_V(DEBUG, TAG, "Query=%s", query);
 866
 867     OCCallbackData cbData =  {.context=NULL, .cb=NULL, .cd=NULL};
 868     cbData.cb = &SRPProvisionACLCB;
 869     ACLData_t *aclData = (ACLData_t *) OICCalloc(1, sizeof(ACLData_t));
 870     if (aclData == NULL)
 871     {
 872         OCPayloadDestroy((OCPayload *)secPayload);
 873         OIC_LOG(ERROR, TAG, "Unable to allocate memory");
 874         return OC_STACK_NO_MEMORY;
 875     }
 876     aclData->deviceInfo = selectedDeviceInfo;
 877     aclData->resultCallback = resultCallback;
 878     aclData->numOfResults=0;
 879     aclData->ctx = ctx;
 880     // call to provision ACL to device1.
 881     int noOfRiCalls = 1;
 882     aclData->resArr = (OCProvisionResult_t*)OICCalloc(noOfRiCalls, sizeof(OCProvisionResult_t));
 883     if (aclData->resArr == NULL)
 884     {
 885         OICFree(aclData);
 886         OCPayloadDestroy((OCPayload *)secPayload);
 887         OIC_LOG(ERROR, TAG, "Unable to allocate memory");
 888         return OC_STACK_NO_MEMORY;
 889     }
 890     cbData.context = (void *)aclData;
 891     cbData.cd = NULL;
 892     OCMethod method = OC_REST_POST;
 893     OCDoHandle handle = NULL;
 894     OIC_LOG(DEBUG, TAG, "Sending ACL info to resource server");
 895     OCStackResult ret = OCDoResource(&handle, method, query,
 896             &selectedDeviceInfo->endpoint, (OCPayload*)secPayload,
 897             selectedDeviceInfo->connType, OC_HIGH_QOS, &cbData, NULL, 0);
 898     if (ret != OC_STACK_OK)
 899     {
 900         OICFree(aclData->resArr);
 901         OICFree(aclData);
 902     }
 903     VERIFY_SUCCESS(TAG, (OC_STACK_OK == ret), ERROR, OC_STACK_ERROR);
 904     return OC_STACK_OK;
 905 }
 906
 907 /**
 908  * Internal Function to store results in result array during Direct-Pairing provisioning.
 909  */
 910 static void registerResultForDirectPairingProvisioning(PconfData_t *pconfData,
 911                                              OCStackResult stackresult)
 912 {
 913    OIC_LOG_V(INFO, TAG, "Inside registerResultForDirectPairingProvisioning "
 914            "pconfData->numOfResults is %d\n", pconfData->numOfResults);
 915    memcpy(pconfData->resArr[(pconfData->numOfResults)].deviceId.id,
 916           pconfData->deviceInfo->doxm->deviceID.id, UUID_LENGTH);
 917    pconfData->resArr[(pconfData->numOfResults)].res = stackresult;
 918    ++(pconfData->numOfResults);
 919 }
 920
 921 /**
 922  * Callback handler of SRPProvisionDirectPairing.
 923  *
 924  * @param[in] ctx             ctx value passed to callback from calling function.
 925  * @param[in] UNUSED          handle to an invocation
 926  * @param[in] clientResponse  Response from queries to remote servers.
 927  * @return  OC_STACK_DELETE_TRANSACTION to delete the transaction
 928  *          and  OC_STACK_KEEP_TRANSACTION to keep it.
 929  */
 930 static OCStackApplicationResult SRPProvisionDirectPairingCB(void *ctx, OCDoHandle UNUSED,
 931                                                   OCClientResponse *clientResponse)
 932 {
 933     OIC_LOG_V(INFO, TAG, "Inside SRPProvisionDirectPairingCB.");
 934     (void)UNUSED;
 935     VERIFY_NON_NULL(TAG, ctx, ERROR, OC_STACK_DELETE_TRANSACTION);
 936     PconfData_t *pconfData = (PconfData_t*)ctx;
 937     OCProvisionResultCB resultCallback = pconfData->resultCallback;
 938
 939     if (clientResponse)
 940     {
 941         if(OC_STACK_RESOURCE_CREATED == clientResponse->result)
 942         {
 943             registerResultForDirectPairingProvisioning(pconfData, OC_STACK_RESOURCE_CREATED);
 944             ((OCProvisionResultCB)(resultCallback))(pconfData->ctx, pconfData->numOfResults,
 945                                                     pconfData->resArr,
 946                                                     false);
 947              OICFree(pconfData->resArr);
 948              OICFree(pconfData);
 949              return OC_STACK_DELETE_TRANSACTION;
 950         }
 951     }
 952     registerResultForDirectPairingProvisioning(pconfData, OC_STACK_ERROR);
 953     ((OCProvisionResultCB)(resultCallback))(pconfData->ctx, pconfData->numOfResults,
 954                                             pconfData->resArr,
 955                                             true);
 956     OIC_LOG_V(ERROR, TAG, "SRPProvisionDirectPairingCB received Null clientResponse");
 957     OICFree(pconfData->resArr);
 958     OICFree(pconfData);
 959     return OC_STACK_DELETE_TRANSACTION;
 960 }
 961
 962 OCStackResult SRPProvisionDirectPairing(void *ctx, const OCProvisionDev_t *selectedDeviceInfo,
 963         OicSecPconf_t *pconf, OCProvisionResultCB resultCallback)
 964 {
 965     VERIFY_NON_NULL(TAG, selectedDeviceInfo, ERROR,  OC_STACK_INVALID_PARAM);
 966     VERIFY_NON_NULL(TAG, pconf, ERROR,  OC_STACK_INVALID_PARAM);
 967     VERIFY_NON_NULL(TAG, resultCallback, ERROR,  OC_STACK_INVALID_CALLBACK);
 968
 969     // check direct-pairing capability
 970     if (true != selectedDeviceInfo->doxm->dpc)
 971     {
 972         OIC_LOG(ERROR, TAG, "Resouce server does not have Direct-Pairing Capability ");
 973         return OC_STACK_UNAUTHORIZED_REQ;
 974     }
 975
 976     OicUuid_t provTooldeviceID =   {.id={0}};
 977     if (OC_STACK_OK != GetDoxmDeviceID(&provTooldeviceID))
 978     {
 979         OIC_LOG(ERROR, TAG, "Error while retrieving provisioning tool's device ID");
 980         return OC_STACK_ERROR;
 981     }
 982     memcpy(&pconf->rowner, &provTooldeviceID, sizeof(OicUuid_t));
 983
 984     OCSecurityPayload* secPayload = (OCSecurityPayload*)OICCalloc(1, sizeof(OCSecurityPayload));
 985     if(!secPayload)
 986     {
 987         OIC_LOG(ERROR, TAG, "Failed to memory allocation");
 988         return OC_STACK_NO_MEMORY;
 989     }
 990     secPayload->base.type = PAYLOAD_TYPE_SECURITY;
 991
 992     if (OC_STACK_OK != PconfToCBORPayload(pconf, &(secPayload->securityData1),
 993                 &(secPayload->payloadSize)))
 994     {
 995         OCPayloadDestroy((OCPayload*)secPayload);
 996         OIC_LOG(ERROR, TAG, "Failed to PconfToCborPayload");
 997         return OC_STACK_NO_MEMORY;
 998     }
 999     OIC_LOG_V(INFO, TAG, "PCONF : %s", secPayload->securityData1);
1000
1001     char query[MAX_URI_LENGTH + MAX_QUERY_LENGTH] = {0};
1002     if(!PMGenerateQuery(true,
1003                 selectedDeviceInfo->endpoint.addr,
1004                 selectedDeviceInfo->securePort,
1005                 selectedDeviceInfo->connType,
1006                 query, sizeof(query), OIC_RSRC_PCONF_URI))
1007     {
1008         OIC_LOG(ERROR, TAG, "SRPProvisionDirectPairing : Failed to generate query");
1009         return OC_STACK_ERROR;
1010     }
1011     OIC_LOG_V(DEBUG, TAG, "Query=%s", query);
1012
1013     OCCallbackData cbData =  {.context=NULL, .cb=NULL, .cd=NULL};
1014     cbData.cb = &SRPProvisionDirectPairingCB;
1015     PconfData_t *pconfData = (PconfData_t *) OICCalloc(1, sizeof(PconfData_t));
1016     if (NULL == pconfData)
1017     {
1018         OCPayloadDestroy((OCPayload*)secPayload);
1019         OIC_LOG(ERROR, TAG, "Unable to allocate memory");
1020         return OC_STACK_NO_MEMORY;
1021     }
1022     pconfData->deviceInfo = selectedDeviceInfo;
1023     pconfData->resultCallback = resultCallback;
1024     pconfData->numOfResults=0;
1025     pconfData->ctx = ctx;
1026     // call to provision PCONF to device1.
1027     int noOfRiCalls = 1;
1028     pconfData->resArr = (OCProvisionResult_t*)OICCalloc(noOfRiCalls, sizeof(OCProvisionResult_t));
1029     if (NULL == pconfData->resArr)
1030     {
1031         OICFree(pconfData);
1032         OCPayloadDestroy((OCPayload*)secPayload);
1033         OIC_LOG(ERROR, TAG, "Unable to allocate memory");
1034         return OC_STACK_NO_MEMORY;
1035     }
1036     cbData.context = (void *)pconfData;
1037     cbData.cd = NULL;
1038     OCMethod method = OC_REST_POST;
1039     OCDoHandle handle = NULL;
1040     OIC_LOG(DEBUG, TAG, "Sending PCONF info to resource server");
1041     OCStackResult ret = OCDoResource(&handle, method, query,
1042             &selectedDeviceInfo->endpoint, (OCPayload*)secPayload,
1043             selectedDeviceInfo->connType, OC_LOW_QOS, &cbData, NULL, 0);
1044     if (OC_STACK_OK != ret)
1045     {
1046         OICFree(pconfData->resArr);
1047         OICFree(pconfData);
1048     }
1049     VERIFY_SUCCESS(TAG, (OC_STACK_OK == ret), ERROR, OC_STACK_ERROR);
1050     return OC_STACK_OK;
1051 }
1052
1053 static void DeleteUnlinkData_t(UnlinkData_t *unlinkData)
1054 {
1055     if (unlinkData)
1056     {
1057         OICFree(unlinkData->unlinkDev);
1058         OICFree(unlinkData->unlinkRes);
1059         OICFree(unlinkData);
1060     }
1061 }
1062
1063 static void registerResultForUnlinkDevices(UnlinkData_t *unlinkData, OCStackResult stackresult,
1064                                            IdxUnlinkRes_t idx)
1065 {
1066     if (NULL != unlinkData)
1067     {
1068         OIC_LOG_V(INFO, TAG, "Inside registerResultForUnlinkDevices unlinkData->numOfResults is %d\n",
1069                             unlinkData->numOfResults);
1070         OIC_LOG_V(INFO, TAG, "Stack result :: %d", stackresult);
1071
1072         OicUuid_t *pUuid = &unlinkData->unlinkRes[(unlinkData->numOfResults)].deviceId;
1073
1074         // Set result in the result array according to the position (devNum).
1075         if (idx != IDX_DB_UPDATE_RES)
1076         {
1077             memcpy(pUuid->id, unlinkData->unlinkDev[idx].doxm->deviceID.id, sizeof(pUuid->id));
1078         }
1079         else
1080         {   // When deivce ID is 000... this means it's the result of database update.
1081             memset(pUuid->id, 0, sizeof(pUuid->id));
1082         }
1083         unlinkData->unlinkRes[(unlinkData->numOfResults)].res = stackresult;
1084         ++(unlinkData->numOfResults);
1085         OIC_LOG (INFO, TAG, "Out registerResultForUnlinkDevices");
1086     }
1087 }
1088
1089 static OCStackResult SendDeleteCredentialRequest(void* ctx,
1090                                                  OCClientResponseHandler respHandler,
1091                                                  const OCProvisionDev_t* revokedDev,
1092                                                  const OCProvisionDev_t* destDev)
1093 {
1094     OIC_LOG(DEBUG, TAG, "IN SendDeleteCredentialRequest");
1095
1096     if (NULL == ctx || NULL == respHandler || NULL == revokedDev || NULL == destDev)
1097     {
1098         return OC_STACK_INVALID_PARAM;
1099     }
1100
1101     char base64Buff[B64ENCODE_OUT_SAFESIZE(sizeof(revokedDev->doxm->deviceID.id)) + 1] = {};
1102     uint32_t base64Len = 0;
1103     if (B64_OK != b64Encode(revokedDev->doxm->deviceID.id, sizeof(revokedDev->doxm->deviceID.id),
1104                            base64Buff, sizeof(base64Buff), &base64Len))
1105     {
1106         OIC_LOG(ERROR, TAG, "SendDeleteCredentialRequest : Failed to base64 encoding");
1107         return OC_STACK_ERROR;
1108     }
1109
1110     char reqBuf[MAX_URI_LENGTH + MAX_QUERY_LENGTH] = {0};
1111     int snRet = 0;
1112                     //coaps://0.0.0.0:5684/oic/sec/cred?sub=(BASE64 ENCODED UUID)
1113     snRet = snprintf(reqBuf, sizeof(reqBuf), SRP_FORM_DELETE_CREDENTIAL, destDev->endpoint.addr,
1114                      destDev->securePort, OIC_RSRC_CRED_URI, OIC_JSON_SUBJECT_NAME, base64Buff);
1115     if (snRet < 0)
1116     {
1117         OIC_LOG_V(ERROR, TAG, "SendDeleteCredentialRequest : Error (snprintf) %d\n", snRet);
1118         return OC_STACK_ERROR;
1119     }
1120     else if ((size_t)snRet >= sizeof(reqBuf))
1121     {
1122         OIC_LOG_V(ERROR, TAG, "SendDeleteCredentialRequest : Truncated (snprintf) %d\n", snRet);
1123         return OC_STACK_ERROR;
1124     }
1125
1126     OCCallbackData cbData;
1127     memset(&cbData, 0, sizeof(cbData));
1128     cbData.context = ctx;
1129     cbData.cb = respHandler;
1130     cbData.cd = NULL;
1131     OIC_LOG_V(INFO, TAG, "URI: %s",reqBuf);
1132
1133     OIC_LOG(DEBUG, TAG, "Sending remove credential request to resource server");
1134
1135     OCStackResult ret = OCDoResource(NULL, OC_REST_DELETE, reqBuf,
1136                                      &destDev->endpoint, NULL,
1137                                      CT_ADAPTER_IP, OC_HIGH_QOS, &cbData, NULL, 0);
1138     if (OC_STACK_OK != ret)
1139     {
1140         OIC_LOG_V(ERROR, TAG, "SendDeleteCredentialRequest : Error in OCDoResource %d", ret);
1141     }
1142     OIC_LOG(DEBUG, TAG, "OUT SendDeleteCredentialRequest");
1143
1144     return ret;
1145 }
1146
1147 /**
1148  * Callback handler of unlink second device.
1149  *
1150  * @param[in] ctx             ctx value passed to callback from calling function.
1151  * @param[in] handle          handle to an invocation
1152  * @param[in] clientResponse  Response from queries to remote servers.
1153  * @return  OC_STACK_DELETE_TRANSACTION to delete the transaction and
1154  *          OC_STACK_KEEP_TRANSACTION to keep it.
1155  */
1156 static OCStackApplicationResult SRPUnlinkDevice2CB(void *unlinkCtx, OCDoHandle handle,
1157         OCClientResponse *clientResponse)
1158 {
1159     (void) handle;
1160     OIC_LOG(DEBUG, TAG, "IN SRPUnlinkDevice2CB");
1161     VERIFY_NON_NULL(TAG, unlinkCtx, ERROR, OC_STACK_DELETE_TRANSACTION);
1162     UnlinkData_t* unlinkData = (UnlinkData_t*)unlinkCtx;
1163
1164     if (clientResponse)
1165     {
1166         OIC_LOG(DEBUG, TAG, "Valid client response for device 2");
1167         registerResultForUnlinkDevices(unlinkData, clientResponse->result, IDX_SECOND_DEVICE_RES);
1168
1169         if (OC_STACK_RESOURCE_DELETED == clientResponse->result)
1170         {
1171             OIC_LOG(DEBUG, TAG, "Credential of device2 revoked");
1172         }
1173         else
1174         {
1175             OIC_LOG(ERROR, TAG, "Unable to delete credential information from device 2");
1176             unlinkData->resultCallback(unlinkData->ctx,
1177                                        unlinkData->numOfResults, unlinkData->unlinkRes, true);
1178             goto error;
1179         }
1180     }
1181     else
1182     {
1183         registerResultForUnlinkDevices(unlinkData, OC_STACK_INVALID_REQUEST_HANDLE,
1184                                        IDX_SECOND_DEVICE_RES);
1185         unlinkData->resultCallback(unlinkData->ctx,
1186                                    unlinkData->numOfResults, unlinkData->unlinkRes, true);
1187         OIC_LOG(ERROR, TAG, "SRPUnlinkDevice2CB received Null clientResponse");
1188         goto error;
1189     }
1190
1191     //Update provisioning DB when succes case.
1192     if (OC_STACK_OK != PDMUnlinkDevices(&unlinkData->unlinkDev[0].doxm->deviceID,
1193                                        &unlinkData->unlinkDev[1].doxm->deviceID))
1194     {
1195         OIC_LOG(FATAL, TAG, "All requests are successfully done but update provisioning DB FAILED.");
1196         registerResultForUnlinkDevices(unlinkData, OC_STACK_INCONSISTENT_DB, IDX_DB_UPDATE_RES);
1197         unlinkData->resultCallback(unlinkData->ctx,
1198                                    unlinkData->numOfResults, unlinkData->unlinkRes, true);
1199         goto error;
1200     }
1201     unlinkData->resultCallback(unlinkData->ctx, unlinkData->numOfResults, unlinkData->unlinkRes,
1202                                false);
1203
1204 error:
1205     DeleteUnlinkData_t(unlinkData);
1206     OIC_LOG(DEBUG, TAG, "OUT SRPUnlinkDevice2CB");
1207     return OC_STACK_DELETE_TRANSACTION;
1208
1209 }
1210
1211 /**
1212  * Callback handler of unlink first device.
1213  *
1214  * @param[in] ctx             ctx value passed to callback from calling function.
1215  * @param[in] handle          handle to an invocation
1216  * @param[in] clientResponse  Response from queries to remote servers.
1217  * @return  OC_STACK_DELETE_TRANSACTION to delete the transaction and
1218  *          OC_STACK_KEEP_TRANSACTION to keep it.
1219  */
1220 static OCStackApplicationResult SRPUnlinkDevice1CB(void *unlinkCtx, OCDoHandle handle,
1221         OCClientResponse *clientResponse)
1222 {
1223     OIC_LOG_V(INFO, TAG, "Inside SRPUnlinkDevice1CB ");
1224     VERIFY_NON_NULL(TAG, unlinkCtx, ERROR, OC_STACK_DELETE_TRANSACTION);
1225     UnlinkData_t* unlinkData = (UnlinkData_t*)unlinkCtx;
1226     (void) handle;
1227
1228     if (clientResponse)
1229     {
1230         OIC_LOG(DEBUG, TAG, "Valid client response for device 1");
1231         registerResultForUnlinkDevices(unlinkData, clientResponse->result, IDX_FIRST_DEVICE_RES);
1232
1233         if (OC_STACK_RESOURCE_DELETED == clientResponse->result)
1234         {
1235             OIC_LOG(DEBUG, TAG, "Credential of device 1 is revoked");
1236
1237             // Second revocation request to second device.
1238             OCStackResult res = SendDeleteCredentialRequest((void*)unlinkData, &SRPUnlinkDevice2CB,
1239                                                     &unlinkData->unlinkDev[0],
1240                                                     &unlinkData->unlinkDev[1] /*Dest*/);
1241             OIC_LOG_V(DEBUG, TAG, "Credential revocation request device 2, result :: %d",res);
1242             if (OC_STACK_OK != res)
1243             {
1244                  OIC_LOG(ERROR, TAG, "Error while sending revocation request for device 2");
1245                  registerResultForUnlinkDevices(unlinkData, OC_STACK_INVALID_REQUEST_HANDLE,
1246                                                 IDX_SECOND_DEVICE_RES);
1247                  unlinkData->resultCallback(unlinkData->ctx,
1248                                             unlinkData->numOfResults, unlinkData->unlinkRes, true);
1249                  goto error;
1250             }
1251             else
1252             {
1253                 OIC_LOG(DEBUG, TAG, "Request for credential revocation successfully sent");
1254                 return OC_STACK_DELETE_TRANSACTION;
1255             }
1256         }
1257         else
1258         {
1259             OIC_LOG(ERROR, TAG, "Unable to delete credential information from device 1");
1260
1261             unlinkData->resultCallback(unlinkData->ctx, unlinkData->numOfResults,
1262                                             unlinkData->unlinkRes, true);
1263             goto error;
1264         }
1265     }
1266     else
1267     {
1268         OIC_LOG(DEBUG, TAG, "Invalid response from server");
1269         registerResultForUnlinkDevices(unlinkData, OC_STACK_INVALID_REQUEST_HANDLE,
1270                                        IDX_FIRST_DEVICE_RES );
1271         unlinkData->resultCallback(unlinkData->ctx,
1272                                    unlinkData->numOfResults, unlinkData->unlinkRes,
1273                                    true);
1274         OIC_LOG(ERROR, TAG, "SRPUnlinkDevice1CB received Null clientResponse");
1275     }
1276
1277 error:
1278     OIC_LOG_V(INFO, TAG, "Out SRPUnlinkDevice1CB");
1279     DeleteUnlinkData_t(unlinkData);
1280     return OC_STACK_DELETE_TRANSACTION;
1281 }
1282
1283 /*
1284 * Function to unlink devices.
1285 * This function will remove the credential & relationship between the two devices.
1286 *
1287 * @param[in] ctx Application context would be returned in result callback
1288 * @param[in] pTargetDev1 first device information to be unlinked.
1289 * @param[in] pTargetDev2 second device information to be unlinked.
1290 * @param[in] resultCallback callback provided by API user, callback will be called when
1291 *            device unlink is finished.
1292  * @return  OC_STACK_OK in case of success and other value otherwise.
1293 */
1294 OCStackResult SRPUnlinkDevices(void* ctx,
1295                                const OCProvisionDev_t* pTargetDev1,
1296                                const OCProvisionDev_t* pTargetDev2,
1297                                OCProvisionResultCB resultCallback)
1298 {
1299     OIC_LOG(INFO, TAG, "IN SRPUnlinkDevices");
1300
1301     if (!pTargetDev1 || !pTargetDev2 || !resultCallback)
1302     {
1303         OIC_LOG(INFO, TAG, "SRPUnlinkDevices : NULL parameters");
1304         return OC_STACK_INVALID_PARAM;
1305     }
1306     OIC_LOG(INFO, TAG, "Unlinking following devices: ");
1307     PMPrintOCProvisionDev(pTargetDev1);
1308     PMPrintOCProvisionDev(pTargetDev2);
1309
1310     // Mark the link status stale
1311     OCStackResult res = PDMSetLinkStale(&pTargetDev1->doxm->deviceID, &pTargetDev2->doxm->deviceID);
1312     if (OC_STACK_OK != res)
1313     {
1314         OIC_LOG(FATAL, TAG, "unable to update DB. Try again.");
1315         return res;
1316     }
1317
1318     UnlinkData_t* unlinkData = (UnlinkData_t*)OICCalloc(1, sizeof(UnlinkData_t));
1319     VERIFY_NON_NULL(TAG, unlinkData, ERROR, OC_STACK_NO_MEMORY);
1320
1321     //Initialize unlink data
1322     unlinkData->ctx = ctx;
1323     unlinkData->unlinkDev = (OCProvisionDev_t*)OICCalloc(2, sizeof(OCProvisionDev_t));
1324     if (NULL == unlinkData->unlinkDev)
1325     {
1326         OIC_LOG(ERROR, TAG, "Memory allocation failed");
1327         res = OC_STACK_NO_MEMORY;
1328         goto error;
1329     }
1330
1331     unlinkData->unlinkRes = (OCProvisionResult_t*)OICCalloc(3, sizeof(OCProvisionResult_t));
1332     if (NULL == unlinkData->unlinkRes)
1333     {
1334         OIC_LOG(ERROR, TAG, "Memory allocation failed");
1335         res = OC_STACK_NO_MEMORY;
1336         goto error;
1337     }
1338
1339     memcpy(&unlinkData->unlinkDev[0], pTargetDev1, sizeof(OCProvisionDev_t));
1340     memcpy(&unlinkData->unlinkDev[1], pTargetDev2, sizeof(OCProvisionDev_t));
1341
1342     unlinkData->numOfResults = 0;
1343     unlinkData->resultCallback = resultCallback;
1344
1345     res = SendDeleteCredentialRequest((void*)unlinkData, &SRPUnlinkDevice1CB,
1346                                        &unlinkData->unlinkDev[1], &unlinkData->unlinkDev[0]);
1347     if (OC_STACK_OK != res)
1348     {
1349         OIC_LOG(ERROR, TAG, "SRPUnlinkDevices : SendDeleteCredentialRequest failed");
1350         goto error;
1351     }
1352
1353     return res;
1354
1355 error:
1356     OIC_LOG(INFO, TAG, "OUT SRPUnlinkDevices");
1357     DeleteUnlinkData_t(unlinkData);
1358     return res;
1359 }
1360
1361 static void DeleteRemoveData_t(RemoveData_t* pRemoveData)
1362 {
1363     if (pRemoveData)
1364     {
1365         OICFree(pRemoveData->revokeTargetDev);
1366         OCDeleteDiscoveredDevices(pRemoveData->linkedDevList);
1367         OICFree(pRemoveData->removeRes);
1368         OICFree(pRemoveData);
1369     }
1370 }
1371
1372 static void registerResultForRemoveDevice(RemoveData_t *removeData, OicUuid_t *pLinkedDevId,
1373                                           OCStackResult stackresult, bool hasError)
1374 {
1375     OIC_LOG_V(INFO, TAG, "Inside registerResultForRemoveDevice removeData->numOfResults is %zu\n",
1376                          removeData->numOfResults + 1);
1377     if (pLinkedDevId)
1378     {
1379         memcpy(removeData->removeRes[(removeData->numOfResults)].deviceId.id,
1380                &pLinkedDevId->id, sizeof(pLinkedDevId->id));
1381     }
1382     else
1383     {
1384         memset(removeData->removeRes[(removeData->numOfResults)].deviceId.id,
1385                0, sizeof(pLinkedDevId->id) );
1386     }
1387     removeData->removeRes[(removeData->numOfResults)].res = stackresult;
1388     removeData->hasError = hasError;
1389     ++(removeData->numOfResults);
1390
1391     // If we get suffcient result from linked devices, we have to call user callback and do free
1392     if (removeData->sizeOfResArray == removeData->numOfResults)
1393     {
1394         if(!removeData->hasError)
1395         {
1396             // Remove device info from prvisioning database
1397             if (OC_STACK_OK != PDMDeleteDevice(&removeData->revokeTargetDev->doxm->deviceID))
1398             {
1399                 OIC_LOG(ERROR, TAG, "ResultForRemoveDevice : Failed to remove device in PDM.");
1400                 removeData->hasError = true;
1401             }
1402         }
1403         removeData->resultCallback(removeData->ctx, removeData->numOfResults, removeData->removeRes,
1404                                    removeData->hasError);
1405         DeleteRemoveData_t(removeData);
1406     }
1407  }
1408
1409 /**
1410  * Callback handler of unlink first device.
1411  *
1412  * @param[in] ctx             ctx value passed to callback from calling function.
1413  * @param[in] handle          handle to an invocation
1414  * @param[in] clientResponse  Response from queries to remote servers.
1415  * @return  OC_STACK_DELETE_TRANSACTION to delete the transaction
1416  *          and  OC_STACK_KEEP_TRANSACTION to keep it.
1417  */
1418 static OCStackApplicationResult SRPRemoveDeviceCB(void *delDevCtx, OCDoHandle handle,
1419         OCClientResponse *clientResponse)
1420 {
1421     //Update the delete credential into delete device context
1422     //Save the deleted status in delDevCtx
1423     (void)handle;
1424     OIC_LOG_V(INFO, TAG, "Inside SRPRemoveDeviceCB.");
1425     VERIFY_NON_NULL(TAG, delDevCtx, ERROR, OC_STACK_DELETE_TRANSACTION);
1426     OCStackResult res = OC_STACK_ERROR;
1427
1428     RemoveData_t* removeData = (RemoveData_t*)delDevCtx;
1429     if(removeData)
1430     {
1431         if (clientResponse)
1432         {
1433             OicUuid_t revDevUuid = {.id={0}};
1434             if(UUID_LENGTH == clientResponse->identity.id_length)
1435             {
1436                 memcpy(revDevUuid.id, clientResponse->identity.id, sizeof(revDevUuid.id));
1437                 if (OC_STACK_RESOURCE_DELETED == clientResponse->result)
1438                 {
1439                     res = PDMUnlinkDevices(&removeData->revokeTargetDev->doxm->deviceID, &revDevUuid);
1440                     if (OC_STACK_OK != res)
1441                     {
1442                         OIC_LOG(ERROR, TAG, "PDMSetLinkStale() FAIL: PDB is an obsolete one.");
1443                                registerResultForRemoveDevice(removeData, &revDevUuid,
1444                                OC_STACK_INCONSISTENT_DB, true);
1445
1446                         return OC_STACK_DELETE_TRANSACTION;
1447                     }
1448
1449                     registerResultForRemoveDevice(removeData, &revDevUuid,
1450                                                   OC_STACK_RESOURCE_DELETED, false);
1451                 }
1452                 else
1453                 {
1454                     registerResultForRemoveDevice(removeData, &revDevUuid,
1455                                                   clientResponse->result, true);
1456                     OIC_LOG(ERROR, TAG, "Unexpected result from DELETE credential request!");
1457                 }
1458             }
1459             else
1460             {
1461                 OIC_LOG_V(WARNING, TAG, "Incorrect length of device UUID was sent from %s:%d",
1462                          clientResponse->devAddr.addr, clientResponse->devAddr.port);
1463
1464                 if (OC_STACK_RESOURCE_DELETED == clientResponse->result)
1465                 {
1466                     /**
1467                       * Since server's credential was deleted,
1468                       * register result as OC_STACK_INCONSISTENT_DB with NULL UUID.
1469                       */
1470
1471                     OIC_LOG_V(ERROR, TAG, "But server's credential was deleted.");
1472                     registerResultForRemoveDevice(removeData, NULL, OC_STACK_INCONSISTENT_DB, true);
1473                 }
1474                 else
1475                 {
1476                     registerResultForRemoveDevice(removeData, NULL, clientResponse->result, true);
1477                 }
1478             }
1479         }
1480         else
1481         {
1482             registerResultForRemoveDevice(removeData, NULL, OC_STACK_ERROR, true);
1483             OIC_LOG(ERROR, TAG, "SRPRemoveDevices received Null clientResponse");
1484         }
1485     }
1486     else
1487     {
1488         OIC_LOG(WARNING, TAG, "SRPRemoveDevices received null context");
1489     }
1490
1491     return OC_STACK_DELETE_TRANSACTION;
1492 }
1493
1494 static OCStackResult GetListofDevToReqDeleteCred(const OCProvisionDev_t* pRevokeTargetDev,
1495                                                  OCProvisionDev_t* pOwnedDevList,
1496                                                  OCUuidList_t* pLinkedUuidList,
1497                                                  OCProvisionDev_t** ppLinkedDevList,
1498                                                  size_t *numOfLinkedDev)
1499 {
1500     // pOwnedDevList could be NULL. It means no alived and owned device now.
1501     if (pRevokeTargetDev == NULL || pLinkedUuidList == NULL ||\
1502         ppLinkedDevList == NULL || numOfLinkedDev == NULL)
1503     {
1504         return OC_STACK_INVALID_PARAM;
1505     }
1506
1507     size_t cnt = 0;
1508     OCUuidList_t *curUuid = NULL, *tmpUuid = NULL;
1509     LL_FOREACH_SAFE(pLinkedUuidList, curUuid, tmpUuid)
1510     {
1511         // Mark the link status stale.
1512         OCStackResult res = PDMSetLinkStale(&curUuid->dev, &pRevokeTargetDev->doxm->deviceID);
1513         if (OC_STACK_OK != res)
1514         {
1515             OIC_LOG(FATAL, TAG, "PDMSetLinkStale() FAIL: PDB is an obsolete one.");
1516             return OC_STACK_INCONSISTENT_DB;
1517         }
1518
1519         if (pOwnedDevList)
1520         {
1521             // If this linked device is alive (power-on), add the deivce to the list.
1522             OCProvisionDev_t *curDev = NULL, *tmpDev = NULL;
1523             LL_FOREACH_SAFE(pOwnedDevList, curDev, tmpDev)
1524             {
1525                 if (memcmp(curDev->doxm->deviceID.id, curUuid->dev.id, sizeof(curUuid->dev.id)) == 0)
1526                 {
1527                     OCProvisionDev_t* targetDev = PMCloneOCProvisionDev(curDev);
1528                     if (NULL == targetDev)
1529                     {
1530                         OIC_LOG(ERROR, TAG, "SRPRemoveDevice : Cloning OCProvisionDev_t Failed.");
1531                         return OC_STACK_NO_MEMORY;
1532                     }
1533
1534                     LL_PREPEND(*ppLinkedDevList, targetDev);
1535                     cnt++;
1536                     break;
1537                 }
1538             }
1539         }
1540     }
1541     *numOfLinkedDev = cnt;
1542     return OC_STACK_OK;
1543 }
1544
1545 /*
1546 * Function to device revocation
1547 * This function will remove credential of target device from all devices in subnet.
1548 *
1549 * @param[in] ctx Application context would be returned in result callback
1550 * @param[in] waitTimeForOwnedDeviceDiscovery Maximum wait time for owned device discovery.(seconds)
1551 * @param[in] pTargetDev Device information to be revoked.
1552 * @param[in] resultCallback callback provided by API user, callback will be called when
1553 *            credential revocation is finished.
1554 * @return  OC_STACK_OK in case of success and other value otherwise.
1555 *          If OC_STACK_OK is returned, the caller of this API should wait for callback.
1556 *          OC_STACK_CONTINUE means operation is success but no request is need to be initiated.
1557 */
1558 OCStackResult SRPRemoveDevice(void* ctx, unsigned short waitTimeForOwnedDeviceDiscovery,
1559                              const OCProvisionDev_t* pTargetDev, OCProvisionResultCB resultCallback)
1560 {
1561     OIC_LOG(INFO, TAG, "IN SRPRemoveDevice");
1562
1563     if (!pTargetDev || !resultCallback || 0 == waitTimeForOwnedDeviceDiscovery)
1564     {
1565         OIC_LOG(INFO, TAG, "SRPRemoveDevice : NULL parameters");
1566         return OC_STACK_INVALID_PARAM;
1567     }
1568
1569     // Declare variables in here to handle error cases with goto statement.
1570     OCProvisionDev_t* pOwnedDevList = NULL;
1571     OCProvisionDev_t* pLinkedDevList = NULL;
1572     RemoveData_t* removeData = NULL;
1573
1574     //1. Find all devices that has a credential of the revoked device
1575     OCUuidList_t* pLinkedUuidList = NULL;
1576     size_t numOfDevices = 0;
1577     OCStackResult res = OC_STACK_ERROR;
1578     res = PDMGetLinkedDevices(&pTargetDev->doxm->deviceID, &pLinkedUuidList, &numOfDevices);
1579     if (OC_STACK_OK != res)
1580     {
1581         OIC_LOG(ERROR, TAG, "SRPRemoveDevice : Failed to get linked devices information");
1582         return res;
1583     }
1584     // if there is no related device, we can skip further process.
1585     if (0 == numOfDevices)
1586     {
1587         OIC_LOG(DEBUG, TAG, "SRPRemoveDevice : No linked device found.");
1588         res = OC_STACK_CONTINUE;
1589         goto error;
1590     }
1591
1592     //2. Find owned device from the network
1593     res = PMDeviceDiscovery(waitTimeForOwnedDeviceDiscovery, true, &pOwnedDevList);
1594     if (OC_STACK_OK != res)
1595     {
1596         OIC_LOG(ERROR, TAG, "SRPRemoveDevice : Failed to PMDeviceDiscovery");
1597         goto error;
1598     }
1599
1600     //3. Make a list of devices to send DELETE credential request
1601     //   by comparing owned devices from provisioning database with mutlicast discovery result.
1602     size_t numOfLinkedDev = 0;
1603     res = GetListofDevToReqDeleteCred(pTargetDev, pOwnedDevList, pLinkedUuidList,
1604                                       &pLinkedDevList, &numOfLinkedDev);
1605     if (OC_STACK_OK != res)
1606     {
1607         OIC_LOG(ERROR, TAG, "SRPRemoveDevice : GetListofDevToReqDeleteCred() failed");
1608         goto error;
1609     }
1610     if (0 == numOfLinkedDev) // This case means, there is linked device but it's not alive now.
1611     {                       // So we don't have to send request message.
1612         OIC_LOG(DEBUG, TAG, "SRPRemoveDevice : No alived & linked device found.");
1613         res = OC_STACK_CONTINUE;
1614         goto error;
1615     }
1616
1617     // 4. Prepare RemoveData Context data.
1618     removeData = (RemoveData_t*)OICCalloc(1, sizeof(RemoveData_t));
1619     if (!removeData)
1620     {
1621         OIC_LOG(ERROR, TAG, "SRPRemoveDevices : Failed to memory allocation");
1622         res = OC_STACK_NO_MEMORY;
1623         goto error;
1624     }
1625
1626     removeData->revokeTargetDev = PMCloneOCProvisionDev(pTargetDev);
1627     if (!removeData->revokeTargetDev)
1628     {
1629         OIC_LOG(ERROR, TAG, "SRPRemoveDevices : PMCloneOCProvisionDev Failed");
1630         res = OC_STACK_NO_MEMORY;
1631         goto error;
1632     }
1633
1634     removeData->removeRes =
1635         (OCProvisionResult_t*)OICCalloc(numOfLinkedDev, sizeof(OCProvisionResult_t));
1636     if (!removeData->removeRes)
1637     {
1638         OIC_LOG(ERROR, TAG, "SRPRemoveDevices : Failed to memory allocation");
1639         res = OC_STACK_NO_MEMORY;
1640         goto error;
1641     }
1642
1643     removeData->ctx = ctx;
1644     removeData->linkedDevList = pLinkedDevList;
1645     removeData->resultCallback = resultCallback;
1646     removeData->numOfResults = 0;
1647     removeData->sizeOfResArray = numOfLinkedDev;
1648     removeData->hasError = false;
1649
1650     // 5. Send DELETE credential request to linked devices.
1651     OCProvisionDev_t *curDev = NULL, *tmpDev = NULL;
1652     OCStackResult totalRes = OC_STACK_ERROR;  /* variable for checking request is sent or not */
1653     LL_FOREACH_SAFE(pLinkedDevList, curDev, tmpDev)
1654     {
1655         res = SendDeleteCredentialRequest((void*)removeData, &SRPRemoveDeviceCB,
1656                                            removeData->revokeTargetDev, curDev);
1657         if (OC_STACK_OK != res)
1658         {
1659             OIC_LOG_V(ERROR, TAG, "SRPRemoveDevice : Fail to send the DELETE credential request to\
1660                      %s:%u", curDev->endpoint.addr, curDev->endpoint.port);
1661         }
1662         else
1663         {
1664             totalRes = OC_STACK_OK; // This means at least one request is successfully sent.
1665         }
1666     }
1667
1668     PDMDestoryOicUuidLinkList(pLinkedUuidList); //TODO: Modify API name to have unified convention.
1669     PMDeleteDeviceList(pOwnedDevList);
1670     OIC_LOG(INFO, TAG, "OUT SRPRemoveDevice");
1671
1672     return totalRes; // Caller of this API should wait callback if totalRes == OC_STACK_OK.
1673
1674 error:
1675     PDMDestoryOicUuidLinkList(pLinkedUuidList);
1676     PMDeleteDeviceList(pOwnedDevList);
1677     PMDeleteDeviceList(pLinkedDevList);
1678     if (removeData)
1679     {
1680         OICFree(removeData->revokeTargetDev);
1681         OICFree(removeData->removeRes);
1682         OICFree(removeData);
1683     }
1684     OIC_LOG(INFO, TAG, "OUT ERROR case SRPRemoveDevice");
1685     return res;
1686 }