Update the random PIN generator module to provide high entropy.
[platform/upstream/iotivity.git] / resource / csdk / security / provisioning / src / multipleownershiptransfermanager.c
1 /* *****************************************************************
2  *
3  * Copyright 2016 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
21 #ifdef HAVE_TIME_H
22 #include <time.h>
23 #endif
24 #ifdef HAVE_UNISTD_H
25 #include <unistd.h>
26 #endif
27 #ifdef HAVE_SYS_TIME_H
28 #include <sys/time.h>
29 #endif
30 #include <stdbool.h>
31 #include <string.h>
32
33 #include "utlist.h"
34 #include "logger.h"
35 #include "oic_malloc.h"
36 #include "oic_string.h"
37 #include "cacommon.h"
38 #include "cainterface.h"
39 #include "base64.h"
40 #include "cJSON.h"
41 #include "global.h"
42
43 #include "srmresourcestrings.h"
44 #include "doxmresource.h"
45 #include "pstatresource.h"
46 #include "credresource.h"
47 #include "aclresource.h"
48 #include "ownershiptransfermanager.h"
49 #include "securevirtualresourcetypes.h"
50 #include "oxmjustworks.h"
51 #include "pmtypes.h"
52 #include "pmutility.h"
53 #include "srmutility.h"
54 #include "provisioningdatabasemanager.h"
55 #include "oxmrandompin.h"
56 #include "ocpayload.h"
57 #include "payload_logging.h"
58 #include "oxmjustworks.h"
59 #include "oxmpreconfpin.h"
60 #include "oxmrandompin.h"
61
62 #define TAG "MULTIPLE_OTM"
63
64 /**********************************************************************
65  * API for Super Owner
66  **********************************************************************/
67
68 /**
69  * Structure to carry SuperOwner's multiple ownership transfer API data to callback.
70  */
71 typedef struct MOTContext MOTContext_t;
72 struct MOTContext
73 {
74     void *ctx;                                  /**< Pointer to user context.**/
75     const OCProvisionDev_t *deviceInfo;         /**< Pointer to OCProvisionDev_t.**/
76     OCProvisionResultCB resultCallback;         /**< Pointer to result callback.**/
77     OCProvisionResult_t *resArr;                /**< Result array.**/
78     int numOfResults;                           /**< Number of results in result array.**/
79     bool hasError;                              /**< Does MOT API have any error.. **/
80 };
81
82 /**
83  * Callback handler of security resource's POST request.
84  *
85  * @param[in] ctx             ctx value passed to callback from calling function.
86  * @param[in] UNUSED          handle to an invocation
87  * @param[in] clientResponse  Response from queries to remote servers.
88  * @return  OC_STACK_DELETE_TRANSACTION to delete the transaction
89  *          and  OC_STACK_KEEP_TRANSACTION to keep it.
90  */
91 static OCStackApplicationResult MOTUpdateSecurityResourceCB(void *ctx, OCDoHandle UNUSED,
92                                                 OCClientResponse *clientResponse)
93 {
94     OIC_LOG_V(INFO, TAG, "Inside MOTUpdateMomCB.");
95     (void)UNUSED;
96     MOTContext_t *motCtx = (MOTContext_t*)ctx;
97     VERIFY_NON_NULL(TAG, motCtx, ERROR);
98     VERIFY_NON_NULL(TAG, motCtx->resultCallback, ERROR);
99     VERIFY_NON_NULL(TAG, motCtx->resArr, ERROR);
100
101     if(clientResponse)
102     {
103         memcpy(motCtx->resArr[0].deviceId.id, motCtx->deviceInfo->doxm->deviceID.id, sizeof(OicUuid_t));
104         motCtx->resArr[0].res = clientResponse->result;
105
106         if(OC_STACK_RESOURCE_CHANGED == clientResponse->result)
107         {
108             motCtx->hasError = false;
109         }
110         else
111         {
112             motCtx->hasError = true;
113         }
114     }
115     else
116     {
117         OIC_LOG_V(ERROR, TAG, "SRPGetACLResourceCB received Null clientResponse");
118         motCtx->resArr[0].res = OC_STACK_ERROR;
119         motCtx->hasError = true;
120     }
121
122     motCtx->resultCallback(motCtx->ctx, motCtx->numOfResults, motCtx->resArr, motCtx->hasError);
123
124 exit:
125     if(motCtx)
126     {
127         OICFree(motCtx->resArr);
128         OICFree(motCtx);
129     }
130     return OC_STACK_DELETE_TRANSACTION;
131 }
132
133 /**
134  * Internal API to send POST doxm request
135  */
136 static OCStackResult MOTSendPostDoxm(void *ctx,
137                                      const OCProvisionDev_t *targetDeviceInfo,
138                                      OCProvisionResultCB resultCallback,
139                                      const OicSecDoxm_t* doxm)
140 {
141     OCStackResult postMomRes = OC_STACK_ERROR;
142     OCSecurityPayload* secPayload = NULL;
143     MOTContext_t *motCtx = NULL;
144     bool freeFlag = true;
145
146     OIC_LOG(DEBUG, TAG, "IN MOTSendPostDoxm");
147
148     //Generate the security payload using updated doxm
149     secPayload = (OCSecurityPayload*)OICCalloc(1, sizeof(OCSecurityPayload));
150     VERIFY_NON_NULL(TAG, secPayload, ERROR);
151     secPayload->base.type = PAYLOAD_TYPE_SECURITY;
152
153     postMomRes = DoxmToCBORPayload(doxm, &secPayload->securityData, &secPayload->payloadSize, true);
154     VERIFY_SUCCESS(TAG, (OC_STACK_OK == postMomRes), ERROR);
155
156     OIC_LOG(DEBUG, TAG, "Created doxm payload to update doxm:");
157     OIC_LOG_BUFFER(DEBUG, TAG, secPayload->securityData, secPayload->payloadSize);
158
159     char query[MAX_URI_LENGTH + MAX_QUERY_LENGTH] = {0};
160     bool queryGenRes = PMGenerateQuery(true,
161                                        targetDeviceInfo->endpoint.addr,
162                                        targetDeviceInfo->securePort,
163                                        targetDeviceInfo->connType,
164                                        query, sizeof(query), OIC_RSRC_DOXM_URI);
165     VERIFY_SUCCESS(TAG, (true == queryGenRes), ERROR);
166     OIC_LOG_V(DEBUG, TAG, "Query=%s", query);
167
168     //Create the MOT Context to handle the response message
169     motCtx = (MOTContext_t*)OICCalloc(1, sizeof(MOTContext_t));
170     VERIFY_NON_NULL(TAG, motCtx, ERROR);
171     motCtx->deviceInfo = targetDeviceInfo;
172     motCtx->resultCallback = resultCallback;
173     motCtx->numOfResults=1;
174     motCtx->hasError = false;
175     motCtx->ctx = ctx;
176     motCtx->resArr = (OCProvisionResult_t*)OICCalloc(1, sizeof(OCProvisionResult_t));
177     VERIFY_NON_NULL(TAG, motCtx->resArr, ERROR);
178
179     //Send POST request
180     OCCallbackData cbData =  {.context=NULL, .cb=NULL, .cd=NULL};
181     cbData.cb = &MOTUpdateSecurityResourceCB;
182     cbData.context = (void *)motCtx;
183     OIC_LOG(DEBUG, TAG, "Sending POST 'doxm' request to resource server");
184     postMomRes = OCDoResource(NULL, OC_REST_POST, query,
185                               &targetDeviceInfo->endpoint, (OCPayload*)secPayload,
186                               targetDeviceInfo->connType, OC_HIGH_QOS, &cbData, NULL, 0);
187     VERIFY_SUCCESS(TAG, (OC_STACK_OK == postMomRes), ERROR);
188
189     freeFlag = false;
190
191     OIC_LOG(DEBUG, TAG, "OUT MOTSendPostDoxm");
192
193 exit:
194     //If POST request successfully sent, motCtx will be cleaned from response handler.
195     if(freeFlag && motCtx)
196     {
197         OICFree(motCtx->resArr);
198         OICFree(motCtx);
199     }
200
201     return postMomRes;
202 }
203
204 /**
205  * API to update 'doxm.mom' to resource server.
206  *
207  * @param[in] targetDeviceInfo Selected target device.
208  * @param[in] momType Mode of multiple ownership transfer (ref. oic.sec.mom)
209  * @param[in] resultCallback callback provided by API user, callback will be called when
210  *            POST 'mom' request recieves a response from resource server.
211  * @return OC_STACK_OK in case of success and other value otherwise.
212  */
213 OCStackResult MOTChangeMode(void *ctx, const OCProvisionDev_t *targetDeviceInfo,
214                             const OicSecMomType_t momType, OCProvisionResultCB resultCallback)
215 {
216     OCStackResult postMomRes = OC_STACK_INVALID_PARAM;
217     OicSecDoxm_t* doxm = NULL;
218     uint8_t* doxmPayload = NULL;
219     size_t doxmPayloadLen = 0;
220
221     OIC_LOG(DEBUG, TAG, "IN MOTChangeMode");
222
223     VERIFY_SUCCESS(TAG, (OIC_NUMBER_OF_MOM_TYPE > momType), ERROR);
224     VERIFY_NON_NULL(TAG, targetDeviceInfo, ERROR);
225     postMomRes = OC_STACK_INVALID_CALLBACK;
226     VERIFY_NON_NULL(TAG, resultCallback, ERROR);
227
228     //Dulpicate doxm resource to update the 'mom' property
229     postMomRes = DoxmToCBORPayload(targetDeviceInfo->doxm, &doxmPayload, &doxmPayloadLen, false);
230     VERIFY_SUCCESS(TAG, (OC_STACK_OK == postMomRes), ERROR);
231
232     postMomRes = CBORPayloadToDoxm(doxmPayload, doxmPayloadLen, &doxm);
233     VERIFY_SUCCESS(TAG, (OC_STACK_OK == postMomRes), ERROR);
234     VERIFY_NON_NULL(TAG, doxm, ERROR);
235
236     if(NULL == doxm->mom)
237     {
238         postMomRes = OC_STACK_NO_MEMORY;
239         doxm->mom = (OicSecMom_t*)OICCalloc(1, sizeof(OicSecMom_t));
240         VERIFY_NON_NULL(TAG, (doxm->mom), ERROR);
241     }
242     doxm->mom->mode = momType;
243
244     //Send POST reuqest for update doxm
245     postMomRes = MOTSendPostDoxm(ctx, targetDeviceInfo, resultCallback, doxm);
246     VERIFY_SUCCESS(TAG, (OC_STACK_OK == postMomRes), ERROR);
247
248     OIC_LOG(DEBUG, TAG, "OUT MOTChangeMode");
249
250 exit:
251     OICFree(doxmPayload);
252     DeleteDoxmBinData(doxm);
253     return postMomRes;
254 }
255
256 /**
257  * API to add 'doxm.oxms' to resource server.
258  *
259  * @param[in] targetDeviceInfo Selected target device.
260  * @param[in] newOxm  OxMs to be added (ref. oic.sec.oxm)
261  * @param[in] resultCallback callback provided by API user, callback will be called when
262  *            POST 'oxms' request recieves a response from resource server.
263  * @return OC_STACK_OK in case of success and other value otherwise.
264  */
265 OCStackResult MOTAddMOTMethod(void *ctx, OCProvisionDev_t *targetDeviceInfo,
266                                  const OicSecOxm_t newOxm, OCProvisionResultCB resultCallback)
267 {
268     OCStackResult postOxmRes = OC_STACK_INVALID_PARAM;
269     OicSecOxm_t* newOxms = NULL;
270     uint8_t* doxmPayload = NULL;
271     size_t doxmPayloadLen = 0;
272
273     OIC_LOG(DEBUG, TAG, "IN MOTAddMOTMethod");
274
275     VERIFY_SUCCESS(TAG, (OIC_OXM_COUNT > newOxm || OIC_PRECONFIG_PIN == newOxm), ERROR);
276     VERIFY_NON_NULL(TAG, targetDeviceInfo, ERROR);
277     postOxmRes = OC_STACK_INVALID_CALLBACK;
278     VERIFY_NON_NULL(TAG, resultCallback, ERROR);
279     postOxmRes = OC_STACK_NO_MEMORY;
280
281     for(size_t i = 0; i < targetDeviceInfo->doxm->oxmLen; i++)
282     {
283         if(targetDeviceInfo->doxm->oxm[i] == newOxm)
284         {
285             OIC_LOG_V(INFO, TAG, "[%d] OxM already supported", (int)newOxm);
286             OCProvisionResult_t* resArr = (OCProvisionResult_t*)OICCalloc(1, sizeof(OCProvisionResult_t));
287             VERIFY_NON_NULL(TAG, resArr, ERROR);
288             resArr->res = OC_STACK_OK;
289             memcpy(resArr->deviceId.id, targetDeviceInfo->doxm->deviceID.id, sizeof(resArr->deviceId.id));
290             resultCallback(ctx, 1, resArr, false);
291             return OC_STACK_OK;
292         }
293     }
294
295     newOxms = (OicSecOxm_t*)OICMalloc(sizeof(OicSecOxm_t) * (targetDeviceInfo->doxm->oxmLen + 1));
296     VERIFY_NON_NULL(TAG, newOxms , ERROR);
297
298     for(size_t i = 0; i < targetDeviceInfo->doxm->oxmLen; i++)
299     {
300         newOxms[i] = targetDeviceInfo->doxm->oxm[i];
301     }
302     newOxms[targetDeviceInfo->doxm->oxmLen] = newOxm;
303     targetDeviceInfo->doxm->oxmLen++;
304     OICFree(targetDeviceInfo->doxm->oxm);
305     targetDeviceInfo->doxm->oxm = newOxms;
306
307     //Send POST reuqest for update doxm
308     postOxmRes = MOTSendPostDoxm(ctx, targetDeviceInfo, resultCallback, targetDeviceInfo->doxm);
309     VERIFY_SUCCESS(TAG, (OC_STACK_OK == postOxmRes), ERROR);
310
311     OIC_LOG(DEBUG, TAG, "OUT MOTAddMOTMethod");
312
313 exit:
314     OICFree(doxmPayload);
315     return postOxmRes;
316 }
317
318 /**
319  * API to update 'doxm.oxmsel' to resource server.
320  *
321  * @param[in] targetDeviceInfo Selected target device.
322   * @param[in] oxmSelValue Method of multiple ownership transfer (ref. oic.sec.oxm)
323  * @param[in] resultCallback callback provided by API user, callback will be called when
324  *            POST 'oxmsel' request recieves a response from resource server.
325  * @return OC_STACK_OK in case of success and other value otherwise.
326  */
327 OCStackResult MOTSelectMOTMethod(void *ctx, const OCProvisionDev_t *targetDeviceInfo,
328                                  const OicSecOxm_t oxmSelValue, OCProvisionResultCB resultCallback)
329 {
330     OCStackResult postMomRes = OC_STACK_INVALID_CALLBACK;
331     OicSecDoxm_t* doxm = NULL;
332     uint8_t* doxmPayload = NULL;
333     size_t doxmPayloadLen = 0;
334
335     OIC_LOG(DEBUG, TAG, "IN MOTSelectOTMethod");
336
337     VERIFY_NON_NULL(TAG, resultCallback, ERROR);
338     postMomRes = OC_STACK_INVALID_PARAM;
339     VERIFY_NON_NULL(TAG, targetDeviceInfo, ERROR);
340
341     bool isValidOxmsel = false;
342     for(size_t i = 0; i < targetDeviceInfo->doxm->oxmLen; i++)
343     {
344         if(targetDeviceInfo->doxm->oxm[i] == oxmSelValue)
345         {
346             isValidOxmsel = true;
347             break;
348         }
349     }
350     VERIFY_SUCCESS(TAG, isValidOxmsel, ERROR);
351
352     //Dulpicate doxm resource to update the 'oxmsel' property
353     postMomRes = DoxmToCBORPayload(targetDeviceInfo->doxm, &doxmPayload, &doxmPayloadLen, false);
354     VERIFY_SUCCESS(TAG, (OC_STACK_OK == postMomRes), ERROR);
355
356     postMomRes = CBORPayloadToDoxm(doxmPayload, doxmPayloadLen, &doxm);
357     VERIFY_SUCCESS(TAG, (OC_STACK_OK == postMomRes), ERROR);
358     VERIFY_NON_NULL(TAG, doxm, ERROR);
359
360     doxm->oxmSel = oxmSelValue;
361
362     //Send POST reuqest for update doxm
363     postMomRes = MOTSendPostDoxm(ctx, targetDeviceInfo, resultCallback, doxm);
364     VERIFY_SUCCESS(TAG, (OC_STACK_OK == postMomRes), ERROR);
365
366     OIC_LOG(DEBUG, TAG, "OUT MOTSelectOTMethod");
367
368 exit:
369     OICFree(doxmPayload);
370     DeleteDoxmBinData(doxm);
371     return postMomRes;
372 }
373
374 /**
375  * API to provision preconfigured PIN to resource server.
376  *
377  * @param[in] targetDeviceInfo Selected target device.
378  * @param[in] preconfPIN Preconfig PIN which is used while multiple owner authentication
379  * @param[in] preconfPINLen Byte length of preconfig PIN
380  * @param[in] resultCallback callback provided by API user, callback will be called when
381  *            POST credential request recieves a response from resource server.
382  * @return OC_STACK_OK in case of success and other value otherwise.
383  */
384 OCStackResult MOTProvisionPreconfigPIN(void *ctx, const OCProvisionDev_t *targetDeviceInfo,
385                                  const char* preconfPIN, size_t preconfPINLen, OCProvisionResultCB resultCallback)
386 {
387     OCStackResult postCredRes = OC_STACK_INVALID_CALLBACK;
388     bool freeFlag = true;
389     OCSecurityPayload* secPayload = NULL;
390     MOTContext_t *motCtx = NULL;
391     OicSecCred_t* pinCred = NULL;
392
393     OIC_LOG(DEBUG, TAG, "IN MOTProvisionPreconfigPIN");
394
395     VERIFY_NON_NULL(TAG, resultCallback, ERROR);
396     postCredRes = OC_STACK_INVALID_PARAM;
397     VERIFY_NON_NULL(TAG, targetDeviceInfo, ERROR);
398     VERIFY_NON_NULL(TAG, preconfPIN, ERROR);
399     VERIFY_SUCCESS(TAG, (0 != preconfPINLen), ERROR);
400     VERIFY_SUCCESS(TAG, (0 != preconfPINLen && OXM_PRECONFIG_PIN_MAX_SIZE >= preconfPINLen), ERROR);
401
402     postCredRes = OC_STACK_NO_MEMORY;
403     //Generate PIN based credential
404     pinCred = (OicSecCred_t*)OICCalloc(1, sizeof(OicSecCred_t));
405     VERIFY_NON_NULL(TAG, pinCred, ERROR);
406
407     pinCred->privateData.data = (uint8_t*)OICMalloc(preconfPINLen + 1);
408     VERIFY_NON_NULL(TAG, pinCred->privateData.data, ERROR);
409
410     memcpy(pinCred->privateData.data, preconfPIN, preconfPINLen);
411     pinCred->privateData.data[preconfPINLen] = '\0';
412     pinCred->privateData.len = preconfPINLen;
413     pinCred->privateData.encoding = OIC_ENCODING_RAW;
414     pinCred->credType = PIN_PASSWORD;
415     OICStrcpy(pinCred->subject.id, sizeof(pinCred->subject.id), WILDCARD_SUBJECT_ID.id);
416
417     //Generate the security payload using updated doxm
418     secPayload = (OCSecurityPayload*)OICCalloc(1, sizeof(OCSecurityPayload));
419     VERIFY_NON_NULL(TAG, secPayload, ERROR);
420     secPayload->base.type = PAYLOAD_TYPE_SECURITY;
421
422     postCredRes = CredToCBORPayload(pinCred, &secPayload->securityData, &secPayload->payloadSize, false);
423     VERIFY_SUCCESS(TAG, (OC_STACK_OK == postCredRes), ERROR);
424
425     OIC_LOG(DEBUG, TAG, "Created Credential payload to register PIN credential:");
426     OIC_LOG_BUFFER(DEBUG, TAG, secPayload->securityData, secPayload->payloadSize);
427
428     char query[MAX_URI_LENGTH + MAX_QUERY_LENGTH] = {0};
429     bool queryGenRes = PMGenerateQuery(true,
430                                        targetDeviceInfo->endpoint.addr,
431                                        targetDeviceInfo->securePort,
432                                        targetDeviceInfo->connType,
433                                        query, sizeof(query), OIC_RSRC_CRED_URI);
434     VERIFY_SUCCESS(TAG, (true == queryGenRes), ERROR);
435     OIC_LOG_V(DEBUG, TAG, "Query=%s", query);
436
437     //Create the MOT Context to handle the response message
438     motCtx = (MOTContext_t*)OICCalloc(1, sizeof(MOTContext_t));
439     VERIFY_NON_NULL(TAG, motCtx, ERROR);
440     motCtx->deviceInfo = targetDeviceInfo;
441     motCtx->resultCallback = resultCallback;
442     motCtx->numOfResults=1;
443     motCtx->hasError = false;
444     motCtx->ctx = ctx;
445     motCtx->resArr = (OCProvisionResult_t*)OICCalloc(1, sizeof(OCProvisionResult_t));
446     VERIFY_NON_NULL(TAG, motCtx->resArr, ERROR);
447
448     //Send POST request
449     OCCallbackData cbData =  {.context=NULL, .cb=NULL, .cd=NULL};
450     cbData.cb = &MOTUpdateSecurityResourceCB;
451     cbData.context = (void *)motCtx;
452     OIC_LOG(DEBUG, TAG, "Sending POST Preconfiged PIN credenatial request to resource server");
453     postCredRes = OCDoResource(NULL, OC_REST_POST, query,
454                               &targetDeviceInfo->endpoint, (OCPayload*)secPayload,
455                               targetDeviceInfo->connType, OC_HIGH_QOS, &cbData, NULL, 0);
456     VERIFY_SUCCESS(TAG, (OC_STACK_OK == postCredRes), ERROR);
457
458     freeFlag = false;
459
460     OIC_LOG(DEBUG, TAG, "OUT MOTProvisionPreconfigPIN");
461
462     return postCredRes;
463
464 exit:
465     //If POST request successfully sent, motCtx will be cleaned from response handler.
466     if(freeFlag && motCtx)
467     {
468         OICFree(motCtx->resArr);
469         OICFree(motCtx);
470     }
471     if(pinCred)
472     {
473         OICFree(pinCred->privateData.data);
474         OICFree(pinCred);
475     }
476     return postCredRes;
477 }
478
479
480 /**********************************************************************
481  * API for Sub Owner
482  **********************************************************************/
483
484 static OCStackResult StartMultipleOwnershipTransfer(OTMContext_t* motCtx,
485                                                     OCProvisionDev_t* selectedDevice);
486
487 static OTMContext_t* g_MotCtx = NULL;
488
489 static bool IsComplete(OTMContext_t* otmCtx)
490 {
491     for(size_t i = 0; i < otmCtx->ctxResultArraySize; i++)
492     {
493         if(OC_STACK_CONTINUE == otmCtx->ctxResultArray[i].res)
494         {
495             return false;
496         }
497     }
498
499     return true;
500 }
501
502 /**
503  * Function to save the result of multiple ownership transfer.
504  *
505  * @param[in,out] motCtx   Context instance of multiple ownership transfer.
506  * @param[in] res   result of multiple ownership transfer.
507  */
508 static void SetMOTResult(OTMContext_t* motCtx, const OCStackResult res)
509 {
510     OIC_LOG_V(DEBUG, TAG, "IN SetMOTResult : %d ", res);
511
512     VERIFY_NON_NULL(TAG, motCtx, ERROR);
513
514     if(motCtx->selectedDeviceInfo)
515     {
516         //Revert psk_info callback in case of random PIN OxM
517         if(OIC_RANDOM_DEVICE_PIN == motCtx->selectedDeviceInfo->doxm->oxmSel ||
518            OIC_PRECONFIG_PIN == motCtx->selectedDeviceInfo->doxm->oxmSel)
519         {
520             if(CA_STATUS_OK != CAregisterPskCredentialsHandler(GetDtlsPskCredentials))
521             {
522                 OIC_LOG(WARNING, TAG, "Failed to revert the DTLS credential handler.");
523             }
524             OicUuid_t emptyUuid = { .id={0}};
525             SetUuidForPinBasedOxm(&emptyUuid);
526         }
527
528         for(size_t i = 0; i < motCtx->ctxResultArraySize; i++)
529         {
530             if(memcmp(motCtx->selectedDeviceInfo->doxm->deviceID.id,
531                       motCtx->ctxResultArray[i].deviceId.id, UUID_LENGTH) == 0)
532             {
533                 motCtx->ctxResultArray[i].res = res;
534                 if(OC_STACK_OK != res)
535                 {
536                     motCtx->ctxHasError = true;
537                 }
538             }
539         }
540
541         g_MotCtx = NULL;
542
543         //If all request is completed, invoke the user callback.
544         if(IsComplete(motCtx))
545         {
546             motCtx->ctxResultCallback(motCtx->userCtx, motCtx->ctxResultArraySize,
547                                        motCtx->ctxResultArray, motCtx->ctxHasError);
548
549             OICFree(motCtx->ctxResultArray);
550             OICFree(motCtx);
551         }
552         else
553         {
554             if(OC_STACK_OK != StartMultipleOwnershipTransfer(motCtx,
555                                                      motCtx->selectedDeviceInfo->next))
556             {
557                 OIC_LOG(ERROR, TAG, "Failed to StartMultipleOwnershipTransfer");
558             }
559         }
560     }
561
562 exit:
563     OIC_LOG(DEBUG, TAG, "OUT SetMOTResult");
564 }
565
566 /**
567  * API to add preconfigured PIN to local SVR DB.
568  *
569  * @param[in] targetDeviceInfo Selected target device.
570  * @param[in] preconfPIN Preconfig PIN which is used while multiple owner authentication
571  * @param[in] preconfPINLen Byte length of preconfig PIN
572  * @param[in] resultCallback callback provided by API user, callback will be called when
573  *            POST credential request recieves a response from resource server.
574  * @return OC_STACK_OK in case of success and other value otherwise.
575  */
576 OCStackResult MOTAddPreconfigPIN(const OCProvisionDev_t *targetDeviceInfo,
577                                  const char* preconfPIN, size_t preconfPINLen)
578 {
579     OCStackResult addCredRes = OC_STACK_INVALID_PARAM;
580     OicSecCred_t* pinCred = NULL;
581     bool freeFlag = true;
582
583     OIC_LOG(DEBUG, TAG, "IN MOTAddPreconfigPIN");
584
585     VERIFY_NON_NULL(TAG, targetDeviceInfo, ERROR);
586     VERIFY_NON_NULL(TAG, preconfPIN, ERROR);
587     VERIFY_SUCCESS(TAG, (0 != preconfPINLen), ERROR);
588     VERIFY_SUCCESS(TAG, (0 != preconfPINLen && OXM_PRECONFIG_PIN_MAX_SIZE >= preconfPINLen), ERROR);
589
590     OicSecCred_t* prevCred = GetCredResourceData(&targetDeviceInfo->doxm->deviceID);
591     if(NULL != prevCred)
592     {
593         OIC_LOG(INFO, TAG, "PIN/PW Credential already exist!");
594         return OC_STACK_OK;
595     }
596
597     addCredRes = OC_STACK_NO_MEMORY;
598     //Generate PIN based credential
599     pinCred = (OicSecCred_t*)OICCalloc(1, sizeof(OicSecCred_t));
600     VERIFY_NON_NULL(TAG, pinCred, ERROR);
601
602     pinCred->privateData.data = (uint8_t*)OICMalloc(preconfPINLen + 1);
603     VERIFY_NON_NULL(TAG, pinCred->privateData.data, ERROR);
604
605     memcpy(pinCred->privateData.data, preconfPIN, preconfPINLen);
606     pinCred->privateData.data[preconfPINLen] = '\0';
607     pinCred->privateData.len = preconfPINLen;
608     pinCred->privateData.encoding = OIC_ENCODING_RAW;
609     pinCred->credType = PIN_PASSWORD;
610     memcpy(pinCred->subject.id, targetDeviceInfo->doxm->deviceID.id, sizeof(pinCred->subject.id));
611
612     addCredRes = AddCredential(pinCred);
613     VERIFY_SUCCESS(TAG, (OC_STACK_OK == addCredRes), ERROR);
614
615     OIC_LOG(DEBUG, TAG, "OUT MOTAddPreconfigPIN");
616
617     return addCredRes;
618
619 exit:
620     if(pinCred)
621     {
622         OICFree(pinCred->privateData.data);
623         OICFree(pinCred);
624     }
625     return addCredRes;
626 }
627
628 /**
629  * Function to save the SubOwner PSK.
630  *
631  * @param[in] selectedDeviceInfo   selected device information to performing provisioning.
632  * @return  OC_STACK_OK on success
633  */
634 static OCStackResult SaveSubOwnerPSK(OCProvisionDev_t *selectedDeviceInfo)
635 {
636     OIC_LOG(DEBUG, TAG, "IN SaveSubOwnerPSK");
637
638     OCStackResult res = OC_STACK_ERROR;
639
640     CAEndpoint_t endpoint;
641     memset(&endpoint, 0x00, sizeof(CAEndpoint_t));
642     OICStrcpy(endpoint.addr, MAX_ADDR_STR_SIZE_CA, selectedDeviceInfo->endpoint.addr);
643     endpoint.addr[MAX_ADDR_STR_SIZE_CA - 1] = '\0';
644     endpoint.port = selectedDeviceInfo->securePort;
645     endpoint.adapter = selectedDeviceInfo->endpoint.adapter;
646
647     OicUuid_t ownerDeviceID = {.id={0}};
648     if (OC_STACK_OK != GetDoxmDeviceID(&ownerDeviceID))
649     {
650         OIC_LOG(ERROR, TAG, "Error while retrieving SubOwner's device ID");
651         return res;
652     }
653
654     uint8_t ownerPSK[OWNER_PSK_LENGTH_128] = {0};
655     OicSecKey_t ownerKey = {ownerPSK, OWNER_PSK_LENGTH_128};
656
657     //Generating SubOwnerPSK
658     CAResult_t pskRet = CAGenerateOwnerPSK(&endpoint,
659             (uint8_t *)GetOxmString(selectedDeviceInfo->doxm->oxmSel),
660             strlen(GetOxmString(selectedDeviceInfo->doxm->oxmSel)),
661             ownerDeviceID.id, sizeof(ownerDeviceID.id),
662             selectedDeviceInfo->doxm->deviceID.id, sizeof(selectedDeviceInfo->doxm->deviceID.id),
663             ownerPSK, OWNER_PSK_LENGTH_128);
664
665     if (CA_STATUS_OK == pskRet)
666     {
667         OIC_LOG(INFO, TAG, "SubOwner PSK dump:");
668         OIC_LOG_BUFFER(INFO, TAG, ownerPSK, OWNER_PSK_LENGTH_128);
669         //Generating new credential for provisioning tool
670         OicSecCred_t *cred = GenerateCredential(&selectedDeviceInfo->doxm->deviceID,
671                                       SYMMETRIC_PAIR_WISE_KEY, NULL,
672                                       &ownerKey, &ownerDeviceID, &ownerDeviceID);
673         VERIFY_NON_NULL(TAG, cred, ERROR);
674
675         uint32_t outSize = 0;
676         size_t b64BufSize = B64ENCODE_OUT_SAFESIZE((OWNER_PSK_LENGTH_128 + 1));
677         char* b64Buf = (uint8_t *)OICCalloc(1, b64BufSize);
678         VERIFY_NON_NULL(TAG, b64Buf, ERROR);
679         b64Encode(cred->privateData.data, cred->privateData.len, b64Buf, b64BufSize, &outSize);
680
681         OICFree( cred->privateData.data );
682         cred->privateData.data = (uint8_t *)OICCalloc(1, outSize + 1);
683         VERIFY_NON_NULL(TAG, cred->privateData.data, ERROR);
684
685         strncpy(cred->privateData.data, b64Buf, outSize);
686         cred->privateData.data[outSize] = '\0';
687         cred->privateData.encoding = OIC_ENCODING_BASE64;
688         cred->privateData.len = outSize;
689         OICFree(b64Buf);
690
691         //Add SubOwnerPSK
692         res = AddCredential(cred);
693         if(res != OC_STACK_OK)
694         {
695             DeleteCredList(cred);
696             return res;
697         }
698     }
699     else
700     {
701         OIC_LOG(ERROR, TAG, "CAGenerateOwnerPSK failed");
702     }
703
704     OIC_LOG(DEBUG, TAG, "OUT SaveSubOwnerPSK");
705 exit:
706     return res;
707 }
708
709
710 /**
711  * Response handler for update subowner crendetial request.
712  *
713  * @param[in] ctx             ctx value passed to callback from calling function.
714  * @param[in] UNUSED          handle to an invocation
715  * @param[in] clientResponse  Response from queries to remote servers.
716  * @return  OC_STACK_DELETE_TRANSACTION to delete the transaction
717  *          and  OC_STACK_KEEP_TRANSACTION to keep it.
718  */
719 static OCStackApplicationResult SubOwnerCredentialHandler(void *ctx, OCDoHandle UNUSED,
720                                 OCClientResponse *clientResponse)
721 {
722     VERIFY_NON_NULL(TAG, clientResponse, WARNING);
723     VERIFY_NON_NULL(TAG, ctx, WARNING);
724
725     OIC_LOG(DEBUG, TAG, "IN SubOwnerCredentialHandler");
726     (void)UNUSED;
727     OCStackResult res = OC_STACK_ERROR;
728     OTMContext_t* motCtx = (OTMContext_t*)ctx;
729
730     if(OC_STACK_RESOURCE_CHANGED == clientResponse->result)
731     {
732         if(motCtx && motCtx->selectedDeviceInfo)
733         {
734             //Close the temporal secure session to verify the owner credential
735             CAEndpoint_t* endpoint = (CAEndpoint_t *)&motCtx->selectedDeviceInfo->endpoint;
736             endpoint->port = motCtx->selectedDeviceInfo->securePort;
737             CAResult_t caResult = CAcloseSslSession(endpoint);
738             if(CA_STATUS_OK != caResult)
739             {
740                 OIC_LOG(ERROR, TAG, "Failed to close DTLS session");
741                 SetMOTResult(motCtx, OC_STACK_ERROR);
742                 return OC_STACK_DELETE_TRANSACTION;
743             }
744
745             // TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA_256 = 0xC037, /**< see RFC 5489 */
746             caResult = CASelectCipherSuite(0xC037, endpoint->adapter);
747             if(CA_STATUS_OK != caResult)
748             {
749                 OIC_LOG(ERROR, TAG, "Failed to select TLS_NULL_WITH_NULL_NULL");
750                 SetMOTResult(motCtx, OC_STACK_ERROR);
751                 return OC_STACK_DELETE_TRANSACTION;
752             }
753
754             res = PDMAddDevice(&motCtx->selectedDeviceInfo->doxm->deviceID);
755              if (OC_STACK_OK == res)
756              {
757                     OIC_LOG_V(INFO, TAG, "Add device's UUID in PDM_DB");
758              }
759               else
760              {
761                   OIC_LOG(ERROR, TAG, "MOT is complete but adding information to DB is failed.");
762              }
763
764             SetMOTResult(motCtx, res);
765         }
766     }
767     else
768     {
769         res = clientResponse->result;
770         OIC_LOG_V(ERROR, TAG, "SubOwnerCredentialHandler : Unexpected result %d", res);
771         SetMOTResult(motCtx, res);
772     }
773
774     OIC_LOG(DEBUG, TAG, "OUT SubOwnerCredentialHandler");
775
776 exit:
777     return  OC_STACK_DELETE_TRANSACTION;
778 }
779
780
781 static OCStackResult PostSubOwnerCredential(OTMContext_t* motCtx)
782 {
783     OIC_LOG(DEBUG, TAG, "IN PostSubOwnerCredential");
784
785     if(!motCtx || !motCtx->selectedDeviceInfo)
786     {
787         OIC_LOG(ERROR, TAG, "Invalid parameters");
788         return OC_STACK_INVALID_PARAM;
789     }
790
791     OCProvisionDev_t* deviceInfo = motCtx->selectedDeviceInfo;
792     char query[MAX_URI_LENGTH + MAX_QUERY_LENGTH] = {0};
793
794     if(!PMGenerateQuery(true,
795                         deviceInfo->endpoint.addr, deviceInfo->securePort,
796                         deviceInfo->connType,
797                         query, sizeof(query), OIC_RSRC_CRED_URI))
798     {
799         OIC_LOG(ERROR, TAG, "PostSubOwnerCredential : Failed to generate query");
800         return OC_STACK_ERROR;
801     }
802     OIC_LOG_V(DEBUG, TAG, "Query=%s", query);
803     OCSecurityPayload* secPayload = (OCSecurityPayload*)OICCalloc(1, sizeof(OCSecurityPayload));
804     if(!secPayload)
805     {
806         OIC_LOG(ERROR, TAG, "Failed to memory allocation");
807         return OC_STACK_NO_MEMORY;
808     }
809
810     //Generate sub-owner credential for new device
811     secPayload->base.type = PAYLOAD_TYPE_SECURITY;
812     const OicSecCred_t* ownerCredential = GetCredResourceData(&(deviceInfo->doxm->deviceID));
813     if(!ownerCredential)
814     {
815         OIC_LOG(ERROR, TAG, "Can not find SubOwnerPSK.");
816         return OC_STACK_NO_RESOURCE;
817     }
818
819     OicUuid_t ownerId = {.id={0}};
820     if(OC_STACK_OK == GetDoxmDeviceID(&ownerId))
821     {
822         OicSecCred_t newCredential;
823         memcpy(&newCredential, ownerCredential, sizeof(OicSecCred_t));
824         newCredential.next = NULL;
825
826         //Set subject ID as SubOwner's ID
827         memcpy(&(newCredential.subject), &ownerId, sizeof(OicUuid_t));
828
829         //Set eowner ID as SubOwner's ID
830         if(NULL == newCredential.eownerID)
831         {
832             newCredential.eownerID = OICCalloc(1, sizeof(OicUuid_t));
833             if(NULL == newCredential.eownerID)
834             {
835                 return OC_STACK_NO_MEMORY;
836             }
837         }
838         memcpy(newCredential.eownerID->id, ownerId.id, sizeof(ownerId.id));
839
840         //Fill private data as empty string
841         newCredential.privateData.data = "";
842         newCredential.privateData.len = 0;
843         newCredential.privateData.encoding = ownerCredential->privateData.encoding;
844 #ifdef __WITH_X509__
845         newCredential.publicData.data = NULL;
846         newCredential.publicData.len = 0;
847 #endif
848         //Send owner credential to new device : POST /oic/sec/cred [ owner credential ]
849         if (OC_STACK_OK != CredToCBORPayload(&newCredential, &secPayload->securityData,
850                                         &secPayload->payloadSize, 0))
851         {
852             OICFree(secPayload);
853             OIC_LOG(ERROR, TAG, "Error while converting bin to cbor.");
854             return OC_STACK_ERROR;
855         }
856         OIC_LOG(DEBUG, TAG, "Cred Payload:");
857         OIC_LOG_BUFFER(DEBUG, TAG, secPayload->securityData, secPayload->payloadSize);
858
859         OCCallbackData cbData;
860         cbData.cb = &SubOwnerCredentialHandler;
861         cbData.context = (void *)motCtx;
862         cbData.cd = NULL;
863         OCStackResult res = OCDoResource(NULL, OC_REST_POST, query,
864                                          &deviceInfo->endpoint, (OCPayload*)secPayload,
865                                          deviceInfo->connType, OC_HIGH_QOS, &cbData, NULL, 0);
866         if (res != OC_STACK_OK)
867         {
868             OIC_LOG(ERROR, TAG, "OCStack resource error");
869         }
870     }
871     else
872     {
873         OIC_LOG(ERROR, TAG, "Failed to read DOXM device ID.");
874         return OC_STACK_NO_RESOURCE;
875     }
876
877     OIC_LOG(DEBUG, TAG, "OUT PostSubOwnerCredential");
878
879     return OC_STACK_OK;
880 }
881
882
883 /**
884  * Function to handle the handshake result in MOT.
885  * This function will be invoked after DTLS handshake
886  * @param   endPoint  [IN] The remote endpoint.
887  * @param   errorInfo [IN] Error information from the endpoint.
888  * @return  NONE
889  */
890 static void MOTDtlsHandshakeCB(const CAEndpoint_t *endpoint, const CAErrorInfo_t *info)
891 {
892     if(NULL != g_MotCtx && NULL != g_MotCtx->selectedDeviceInfo &&
893        NULL != endpoint && NULL != info)
894     {
895         OIC_LOG_V(INFO, TAG, "Received status from remote device(%s:%d) : %d",
896                  endpoint->addr, endpoint->port, info->result);
897
898         OicSecDoxm_t* newDevDoxm = g_MotCtx->selectedDeviceInfo->doxm;
899
900         if(NULL != newDevDoxm)
901         {
902             OicUuid_t emptyUuid = {.id={0}};
903
904             //Make sure the address matches.
905             if(strncmp(g_MotCtx->selectedDeviceInfo->endpoint.addr,
906                endpoint->addr,
907                sizeof(endpoint->addr)) == 0 &&
908                g_MotCtx->selectedDeviceInfo->securePort == endpoint->port)
909             {
910                 OCStackResult res = OC_STACK_ERROR;
911
912                 //If temporal secure sesstion established successfully
913                 if(CA_STATUS_OK == info->result)
914                 {
915                     //Delete previous credential such as preconfigured-pin
916                     RemoveCredential(&(g_MotCtx->selectedDeviceInfo->doxm->deviceID));
917
918                     res = SaveSubOwnerPSK(g_MotCtx->selectedDeviceInfo);
919                     if(OC_STACK_OK == res)
920                     {
921                         //POST sub owner credential to new device.
922                         res = PostSubOwnerCredential(g_MotCtx);
923                         if(OC_STACK_OK != res)
924                         {
925                             OIC_LOG(ERROR, TAG,
926                                     "Failed to send POST request for SubOwner Credential");
927                             SetMOTResult(g_MotCtx, res);
928                         }
929                     }
930                     else
931                     {
932                         OIC_LOG(ERROR, TAG, "Failed to save the SubOwner PSK.");
933                         SetMOTResult(g_MotCtx, res);
934                     }
935                 }
936                 //In case of authentication failure
937                 else if(CA_DTLS_AUTHENTICATION_FAILURE == info->result)
938                 {
939                     //in case of error from wrong PIN, re-start the ownership transfer
940                     if(OIC_RANDOM_DEVICE_PIN == newDevDoxm->oxmSel)
941                     {
942                         OIC_LOG(ERROR, TAG, "The PIN number may incorrect.");
943
944                         g_MotCtx->attemptCnt++;
945
946                         if(WRONG_PIN_MAX_ATTEMP > g_MotCtx->attemptCnt)
947                         {
948                             res = StartMultipleOwnershipTransfer(g_MotCtx, g_MotCtx->selectedDeviceInfo);
949                             if(OC_STACK_OK != res)
950                             {
951                                 SetMOTResult(g_MotCtx, res);
952                                 OIC_LOG(ERROR, TAG, "Failed to Re-StartOwnershipTransfer");
953                             }
954                         }
955                         else
956                         {
957                             OIC_LOG(ERROR, TAG, "User has exceeded the number of authentication attempts.");
958                             SetMOTResult(g_MotCtx, OC_STACK_AUTHENTICATION_FAILURE);
959                         }
960                     }
961                     else
962                     {
963                         OIC_LOG(ERROR, TAG, "Failed to establish DTLS session.");
964                         SetMOTResult(g_MotCtx, OC_STACK_AUTHENTICATION_FAILURE);
965                     }
966                 }
967             }
968         }
969     }
970 }
971
972 static OCStackResult StartMultipleOwnershipTransfer(OTMContext_t* motCtx,
973                                                     OCProvisionDev_t* selectedDevice)
974 {
975     OIC_LOG(INFO, TAG, "IN StartMultipleOwnershipTransfer");
976     OCStackResult res = OC_STACK_INVALID_PARAM;
977
978     VERIFY_NON_NULL(TAG, selectedDevice, ERROR);
979     VERIFY_NON_NULL(TAG, selectedDevice->doxm, ERROR);
980
981     motCtx->selectedDeviceInfo = selectedDevice;
982
983     //Register DTLS event handler to catch the dtls event while handshake
984     if(CA_STATUS_OK != CAregisterSslHandshakeCallback(MOTDtlsHandshakeCB))
985     {
986         OIC_LOG(WARNING, TAG, "StartOwnershipTransfer : Failed to register DTLS handshake callback.");
987     }
988
989     OicSecOxm_t oxmSel = selectedDevice->doxm->oxmSel;
990     OIC_LOG_V(DEBUG, TAG, "Multiple Ownership Transfer method = %d", (int)oxmSel);
991
992     res = OTMSetOTCallback(selectedDevice->doxm->oxmSel, &motCtx->otmCallback);
993     if(OC_STACK_OK != res)
994     {
995         OIC_LOG_V(ERROR, TAG, "Error in OTMSetOTCallback : %d", res);
996         return res;
997     }
998     //Only two functions required for MOT
999     VERIFY_NON_NULL(TAG, motCtx->otmCallback.loadSecretCB, ERROR);
1000     VERIFY_NON_NULL(TAG, motCtx->otmCallback.createSecureSessionCB, ERROR);
1001
1002     if(OIC_PRECONFIG_PIN != oxmSel && OIC_RANDOM_DEVICE_PIN != oxmSel)
1003     {
1004         OIC_LOG(ERROR, TAG, "Unsupported OxM");
1005         return OC_STACK_ERROR;
1006     }
1007
1008     if(OIC_RANDOM_DEVICE_PIN == oxmSel)
1009     {
1010         if(CA_STATUS_OK != CAregisterPskCredentialsHandler(GetDtlsPskForRandomPinOxm))
1011         {
1012             OIC_LOG(ERROR, TAG, "Failed to register DTLS credential handler for Random PIN OxM.");
1013         }
1014     }
1015
1016     res = motCtx->otmCallback.loadSecretCB(motCtx);
1017     VERIFY_SUCCESS(TAG, OC_STACK_OK == res, ERROR);
1018
1019     //Save the current context instance to use on the dtls handshake callback
1020     g_MotCtx = motCtx;
1021
1022     res = motCtx->otmCallback.createSecureSessionCB(motCtx);
1023     VERIFY_SUCCESS(TAG, OC_STACK_OK == res, ERROR);
1024
1025     OIC_LOG(INFO, TAG, "OUT StartMultipleOwnershipTransfer");
1026
1027 exit:
1028     return res;
1029 }
1030
1031 OCStackResult MOTDoOwnershipTransfer(void* ctx,
1032                                      OCProvisionDev_t *selectedDevicelist,
1033                                      OCProvisionResultCB resultCallback)
1034 {
1035     OIC_LOG(DEBUG, TAG, "IN MOTDoOwnershipTransfer");
1036     OCStackResult res = OC_STACK_INVALID_PARAM;
1037     OTMContext_t* motCtx = NULL;
1038     OCProvisionDev_t* pCurDev = NULL;
1039
1040     VERIFY_NON_NULL(TAG, selectedDevicelist, ERROR);
1041     VERIFY_NON_NULL(TAG, resultCallback, ERROR);
1042
1043     res = OC_STACK_NO_MEMORY;
1044     motCtx = (OTMContext_t*)OICCalloc(1,sizeof(OTMContext_t));
1045     VERIFY_NON_NULL(TAG, motCtx, ERROR);
1046
1047     motCtx->ctxResultCallback = resultCallback;
1048     motCtx->ctxHasError = false;
1049     motCtx->userCtx = ctx;
1050     motCtx->ctxResultArraySize = 0;
1051     LL_FOREACH(selectedDevicelist, pCurDev)
1052     {
1053         motCtx->ctxResultArraySize++;
1054     }
1055
1056     motCtx->ctxResultArray =
1057         (OCProvisionResult_t*)OICCalloc(motCtx->ctxResultArraySize, sizeof(OCProvisionResult_t));
1058     VERIFY_NON_NULL(TAG, motCtx->ctxResultArray, ERROR);
1059
1060     //Fill the device UUID for result array.
1061     size_t devIdx = 0;
1062     res = OC_STACK_OK;
1063     pCurDev = NULL;
1064     LL_FOREACH(selectedDevicelist, pCurDev)
1065     {
1066         //Checking duplication of Device ID.
1067         bool isDuplicate = true;
1068         res = PDMIsDuplicateDevice(&pCurDev->doxm->deviceID, &isDuplicate);
1069         VERIFY_SUCCESS(TAG, OC_STACK_OK == res, ERROR);
1070
1071         if (isDuplicate)
1072         {
1073             bool isStale = false;
1074             res = PDMIsDeviceStale(&pCurDev->doxm->deviceID, &isStale);
1075             VERIFY_SUCCESS(TAG, OC_STACK_OK == res, ERROR);
1076             VERIFY_SUCCESS(TAG, isStale, ERROR);
1077
1078             if(isStale)
1079             {
1080                 OIC_LOG(INFO, TAG, "Detected duplicated UUID in stale status, "\
1081                                    "this UUID will be removed from PDM");
1082
1083                 res = PDMDeleteDevice(&pCurDev->doxm->deviceID);
1084                 VERIFY_SUCCESS(TAG, OC_STACK_OK == res, ERROR);
1085             }
1086         }
1087
1088         memcpy(motCtx->ctxResultArray[devIdx].deviceId.id,
1089                pCurDev->doxm->deviceID.id,
1090                UUID_LENGTH);
1091         motCtx->ctxResultArray[devIdx].res = OC_STACK_CONTINUE;
1092         devIdx++;
1093     }
1094
1095     res = StartMultipleOwnershipTransfer(motCtx, selectedDevicelist);
1096     VERIFY_SUCCESS(TAG, OC_STACK_OK == res, ERROR);
1097
1098     OIC_LOG(DEBUG, TAG, "OUT MOTDoOwnershipTransfer");
1099
1100 exit:
1101     if(OC_STACK_OK != res)
1102     {
1103         if(motCtx)
1104         {
1105             OICFree(motCtx->ctxResultArray);
1106             OICFree(motCtx);
1107         }
1108     }
1109     return res;
1110 }