resource/csdk/security/src/directpairing.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 #ifndef _POSIX_C_SOURCE
  21 #define _POSIX_C_SOURCE 200112L
  22 #endif
  23 #include "iotivity_config.h"
  24 #ifdef HAVE_UNISTD_H
  25 #include <unistd.h>
  26 #endif
  27 #ifdef HAVE_TIME_H
  28 #include <time.h>
  29 #endif
  30 #ifdef HAVE_SYS_TIME_H
  31 #include <sys/time.h>
  32 #endif
  33 #ifdef HAVE_STRING_H
  34 #include <string.h>
  35 #endif
  36
  37 #include "ocstack.h"
  38 #include "oic_malloc.h"
  39 #include "oic_string.h"
  40 #include "logger.h"
  41 #include "cJSON.h"
  42 #include "utlist.h"
  43 #include "ocpayload.h"
  44 #include "payload_logging.h"
  45 #include "cainterface.h"
  46
  47 #include "directpairing.h"
  48 #include "srmresourcestrings.h" //@note: SRM's internal header
  49 #include "doxmresource.h"       //@note: SRM's internal header
  50 #include "pconfresource.h"       //@note: SRM's internal header
  51 #include "dpairingresource.h"       //@note: SRM's internal header
  52 #include "credresource.h"
  53
  54 #include "pmtypes.h"
  55 #include "pmutility.h"
  56
  57 #include "srmutility.h"
  58
  59 #ifdef __WITH_DTLS__
  60 #include "global.h"
  61 #endif
  62
  63
  64 #define TAG ("OIC_DP")
  65 static const uint16_t CBOR_SIZE = 1024;
  66
  67 /**
  68  * Structure to carry direct-pairing API data to callback.
  69  */
  70 typedef struct DPairData
  71 {
  72     OCDirectPairingDev_t        *peer;                         /**< Pointer to pairing target info.**/
  73     char                                  pin[DP_PIN_LENGTH];  /**< PIN **/
  74     OCDirectPairingResultCB    resultCallback;           /**< Pointer to result callback.**/
  75     void *userCtx;                                      /** < user context to pass in callback **/
  76 } DPairData_t;
  77
  78 static OCDirectPairingDev_t *g_dp_paired = NULL;
  79 static OCDirectPairingDev_t *g_dp_discover = NULL;
  80 static DPairData_t *g_dp_proceed_ctx = NULL;
  81
  82
  83 /**
  84  * Function to search node in linked list that matches given IP and port.
  85  *
  86  * @param[in] pList         List of OCProvisionDev_t.
  87  * @param[in] addr          address of target device.
  88  * @param[in] port          port of remote server.
  89  *
  90  * @return pointer of OCProvisionDev_t if exist, otherwise NULL
  91  */
  92 OCDirectPairingDev_t* getDev(OCDirectPairingDev_t **ppList, const char* addr, const uint16_t port)
  93 {
  94     if(NULL == addr)
  95     {
  96         OIC_LOG_V(ERROR, TAG, "Invalid Input parameters in [%s]\n", __FUNCTION__);
  97         return NULL;
  98     }
  99
 100     OCDirectPairingDev_t *ptr = NULL;
 101     LL_FOREACH(*ppList, ptr)
 102     {
 103         if( strcmp(ptr->endpoint.addr, addr) == 0 && port == ptr->endpoint.port)
 104         {
 105             return ptr;
 106         }
 107     }
 108
 109     return NULL;
 110 }
 111
 112
 113
 114 /**
 115  * Add device information to list.
 116  *
 117  * @param[in] pList         List of OCProvisionDev_t.
 118  * @param[in] addr          address of target device.
 119  * @param[in] port          port of remote server.
 120  * @param[in] adapter       adapter type of endpoint.
 121  * @param[in] doxm          pointer to doxm instance.
 122  * @param[in] connType  connectivity type of endpoint
 123  *
 124  * @return OC_STACK_OK for success and errorcode otherwise.
 125  */
 126 OCStackResult addDev(OCDirectPairingDev_t **ppList, OCDevAddr *endpoint,
 127                                       OCConnectivityType conn, OicSecPconf_t *pconf)
 128 {
 129     if(NULL == endpoint || NULL == pconf)
 130     {
 131         OIC_LOG_V(ERROR, TAG, "Invalid Input parameters in [%s]\n", __FUNCTION__);
 132         return OC_STACK_INVALID_PARAM;
 133     }
 134
 135     OCDirectPairingDev_t *ptr = getDev(ppList, endpoint->addr, endpoint->port);
 136     if(!ptr)
 137     {
 138         ptr = (OCDirectPairingDev_t *)OICCalloc(1, sizeof (OCDirectPairingDev_t));
 139         if (NULL == ptr)
 140         {
 141             OIC_LOG(ERROR, TAG, "Error while allocating memory for linkedlist node !!");
 142             return OC_STACK_NO_MEMORY;
 143         }
 144
 145         memcpy(&ptr->endpoint, endpoint, sizeof(OCDevAddr));
 146         ptr->connType = conn;
 147         ptr->securePort = DEFAULT_SECURE_PORT;
 148         ptr->edp = pconf->edp;
 149         ptr->prm = pconf->prm;
 150         pconf->prm = NULL;  // to prevent free
 151         ptr->prmLen = pconf->prmLen;
 152         memcpy(&ptr->deviceID, &pconf->deviceID, sizeof(OicUuid_t));
 153         memcpy(&ptr->rowner, &pconf->rownerID, sizeof(OicUuid_t));
 154         ptr->next = NULL;
 155
 156         LL_PREPEND(*ppList, ptr);
 157         OIC_LOG(INFO, TAG, "device added !");
 158     }
 159
 160     return OC_STACK_OK;
 161 }
 162
 163
 164 /**
 165  * Add device information to list.
 166  *
 167  * @param[in] ppList         List of OCProvisionDev_t.
 168  * @param[in] pDev          target device.
 169  *
 170  * @return OC_STACK_OK for success and errorcode otherwise.
 171  */
 172 OCStackResult addDev2(OCDirectPairingDev_t **ppList, OCDirectPairingDev_t *pDev)
 173 {
 174     if(NULL == pDev)
 175     {
 176         OIC_LOG_V(ERROR, TAG, "Invalid Input parameters in [%s]\n", __FUNCTION__);
 177         return OC_STACK_INVALID_PARAM;
 178     }
 179
 180     OCDirectPairingDev_t *ptr = getDev(ppList, pDev->endpoint.addr, pDev->endpoint.port);
 181     if(!ptr)
 182     {
 183         ptr = (OCDirectPairingDev_t *)OICCalloc(1, sizeof (OCDirectPairingDev_t));
 184         if (NULL == ptr)
 185         {
 186             OIC_LOG(ERROR, TAG, "Error while allocating memory for linkedlist node !!");
 187             return OC_STACK_NO_MEMORY;
 188         }
 189
 190         memcpy(&ptr->endpoint, &pDev->endpoint, sizeof(OCDevAddr));
 191         ptr->connType = pDev->connType;
 192         ptr->securePort = pDev->securePort;
 193         ptr->edp = pDev->edp;
 194         ptr->prmLen = pDev->prmLen;
 195         ptr->prm = (OicSecPrm_t*)OICCalloc(ptr->prmLen, sizeof (OicSecPrm_t));
 196         if (NULL == ptr->prm)
 197         {
 198             OIC_LOG(ERROR, TAG, "Error while allocating memory for prm !!");
 199             return OC_STACK_NO_MEMORY;
 200         }
 201         memcpy(ptr->prm, pDev->prm, sizeof(OicSecPrm_t)*ptr->prmLen);
 202         memcpy(&ptr->deviceID, &pDev->deviceID, sizeof(OicUuid_t));
 203         memcpy(&ptr->rowner, &pDev->rowner, sizeof(OicUuid_t));
 204         ptr->next = NULL;
 205
 206         LL_PREPEND(*ppList, ptr);
 207         OIC_LOG(INFO, TAG, "device added !");
 208     }
 209
 210     return OC_STACK_OK;
 211 }
 212
 213
 214
 215 /**
 216  * This function deletes list of provision target devices
 217  *
 218  * @param[in] pDevicesList         List of OCProvisionDev_t.
 219  */
 220 void delList(OCDirectPairingDev_t *pList)
 221 {
 222     if(pList)
 223     {
 224         OCDirectPairingDev_t *del = NULL, *tmp = NULL;
 225         LL_FOREACH_SAFE(pList, del, tmp)
 226         {
 227             LL_DELETE(pList, del);
 228             if (del && del->prm)
 229             {
 230                 OICFree(del->prm);
 231             }
 232         }
 233     }
 234 }
 235
 236 bool DPGenerateQuery(bool isSecure,
 237                      const char* address, const uint16_t port,
 238                      const OCConnectivityType connType,
 239                      char* buffer, size_t bufferSize, const char* uri)
 240 {
 241     if(!address || !buffer || !uri)
 242     {
 243         OIC_LOG(ERROR, TAG, "DPGenerateQuery : Invalid parameters.");
 244         return false;
 245     }
 246
 247     static char QPREFIX_COAP[] =  "coap://";
 248     static char QPREFIX_COAPS[] = "coaps://";
 249     static char QPREFIX_COAP_TCP[] =  "coap+tcp://";
 250     static char QPREFIX_COAPS_TCP[] = "coaps+tcp://";
 251
 252     int snRet = 0;
 253     char* prefix = (isSecure == true) ? QPREFIX_COAPS : QPREFIX_COAP;
 254
 255     switch(connType & CT_MASK_ADAPTER)
 256     {
 257 // @todo: Remove this ifdef. On Arduino, CT_ADAPTER_TCP resolves to the same value
 258 // as CT_ADAPTER_IP, resulting in a compiler error.
 259 #ifdef WITH_TCP
 260 #ifndef WITH_ARDUINO
 261         case CT_ADAPTER_TCP:
 262             prefix = (isSecure == true) ? QPREFIX_COAPS_TCP : QPREFIX_COAP_TCP;
 263 #endif
 264 #endif
 265         case CT_ADAPTER_IP:
 266             switch(connType & CT_MASK_FLAGS & ~CT_FLAG_SECURE)
 267             {
 268                 case CT_IP_USE_V4:
 269                     snRet = snprintf(buffer, bufferSize, "%s%s:%d%s",
 270                                      prefix, address, port, uri);
 271                     break;
 272                 case CT_IP_USE_V6:
 273                 {
 274                     char addressEncoded[CA_MAX_URI_LENGTH] = {0};
 275
 276                     OCStackResult result = OCEncodeAddressForRFC6874(addressEncoded,
 277                                                                      sizeof(addressEncoded),
 278                                                                      address);
 279                     if (OC_STACK_OK != result)
 280                     {
 281                         OIC_LOG_V(ERROR, TAG, "DPGenerateQuery : encoding error %d\n", result);
 282                         return false;
 283                     }
 284
 285                     snRet = snprintf(buffer, bufferSize, "%s[%s]:%d%s",
 286                                      prefix, addressEncoded, port, uri);
 287                     break;
 288                 }
 289                 default:
 290                     OIC_LOG(ERROR, TAG, "Unknown address format.");
 291                     return false;
 292             }
 293             // snprintf return value check
 294             if (snRet < 0)
 295             {
 296                 OIC_LOG_V(ERROR, TAG, "DPGenerateQuery : Error (snprintf) %d\n", snRet);
 297                 return false;
 298             }
 299             else if ((size_t)snRet >= bufferSize)
 300             {
 301                 OIC_LOG_V(ERROR, TAG, "DPGenerateQuery : Truncated (snprintf) %d\n", snRet);
 302                 return false;
 303             }
 304
 305             break;
 306 #ifndef WITH_ARDUINO
 307         // TODO: We need to verify tinyDTLS in below cases
 308         case CT_ADAPTER_GATT_BTLE:
 309         case CT_ADAPTER_RFCOMM_BTEDR:
 310             OIC_LOG(ERROR, TAG, "Not supported connectivity adapter.");
 311             return false;
 312             break;
 313 #endif
 314         default:
 315             OIC_LOG(ERROR, TAG, "Unknown connectivity adapter.");
 316             return false;
 317     }
 318
 319     return true;
 320 }
 321
 322 const OCDirectPairingDev_t* DPGetDiscoveredDevices()
 323 {
 324     return g_dp_discover;
 325 }
 326
 327 const OCDirectPairingDev_t* DPGetPairedDevices()
 328 {
 329     return g_dp_paired;
 330 }
 331
 332 void DPDeleteLists()
 333 {
 334     delList(g_dp_discover);
 335     delList(g_dp_paired);
 336 }
 337
 338 /**
 339  * Callback handler of FinalizeDirectPairing.
 340  *
 341  * @param[in] ctx             ctx value passed to callback from calling function.
 342  * @param[in] UNUSED          handle to an invocation
 343  * @param[in] clientResponse  Response from queries to remote servers.
 344  * @return  OC_STACK_DELETE_TRANSACTION to delete the transaction
 345  *          and  OC_STACK_KEEP_TRANSACTION to keep it.
 346  */
 347 static OCStackApplicationResult DirectPairingFinalizeHandler(void *ctx, OCDoHandle UNUSED,
 348                                                   OCClientResponse *clientResponse)
 349 {
 350     OIC_LOG_V(INFO, TAG, "IN DirectPairingFinalizeHandler()");
 351     (void)UNUSED;
 352     if(NULL == ctx)
 353     {
 354         OIC_LOG(ERROR, TAG, "Context is Null");
 355         return OC_STACK_DELETE_TRANSACTION;
 356     }
 357
 358     OCStackResult res;
 359     DPairData_t *dpairData = (DPairData_t*)ctx;
 360     OCDirectPairingDev_t *peer = dpairData->peer;
 361     OCDirectPairingResultCB resultCallback = dpairData->resultCallback;
 362
 363     if (clientResponse)
 364     {
 365         if(OC_STACK_RESOURCE_CHANGED == clientResponse->result)
 366         {
 367             // result
 368             OIC_LOG(INFO, TAG, "DirectPairingFinalizeHandler : success PUT"
 369                     " request to /oic/sec/dpairing");
 370
 371             CAEndpoint_t endpoint;
 372             memset(&endpoint, 0x00, sizeof(CAEndpoint_t));
 373             OICStrcpy(endpoint.addr, MAX_ADDR_STR_SIZE_CA, peer->endpoint.addr);
 374             endpoint.addr[MAX_ADDR_STR_SIZE_CA - 1] = '\0';
 375             endpoint.port = peer->securePort;
 376
 377             OicUuid_t ptDeviceID = {.id={0}};
 378             if (OC_STACK_OK != GetDoxmDeviceID(&ptDeviceID))
 379             {
 380                 OIC_LOG(ERROR, TAG, "Error while retrieving provisioning tool's device ID");
 381                 resultCallback(dpairData->userCtx, peer, OC_STACK_ERROR);
 382                 return OC_STACK_DELETE_TRANSACTION;
 383             }
 384
 385 #if defined(__WITH_DTLS__) || defined(__WITH_TLS__)
 386             res = SavePairingPSK((OCDevAddr*)&endpoint, &peer->deviceID, &ptDeviceID, false);
 387             if(OC_STACK_OK != res)
 388             {
 389                 OIC_LOG(ERROR, TAG, "Failed to PairingPSK generation");
 390                 resultCallback(dpairData->userCtx, peer, res);
 391                 return OC_STACK_DELETE_TRANSACTION;
 392             }
 393
 394             //  close temporary sesion
 395             CAResult_t caResult = CAcloseSslSession((const CAEndpoint_t*)&endpoint);
 396             if(CA_STATUS_OK != caResult)
 397             {
 398                 OIC_LOG(INFO, TAG, "Fail to close temporary dtls session");
 399             }
 400
 401             caResult = CASelectCipherSuite(TLS_NULL_WITH_NULL_NULL, CA_ADAPTER_IP);
 402             if(CA_STATUS_OK != caResult)
 403             {
 404                 OIC_LOG(ERROR, TAG, "Failed to select TLS_NULL_WITH_NULL_NULL");
 405             }
 406 #endif // __WITH_DTLS__ or __WITH_TLS__
 407
 408             OIC_LOG(INFO, TAG, "Direct-Papring was successfully completed.");
 409
 410             // update paired list
 411             OCDirectPairingDev_t *dev = getDev(&g_dp_discover, peer->endpoint.addr,
 412                     peer->endpoint.port);
 413             res = addDev2(&g_dp_paired, dev);
 414             if (OC_STACK_OK != res)
 415             {
 416                 OIC_LOG(ERROR, TAG, "Error while adding a device to paired list.");
 417             }
 418
 419             resultCallback(dpairData->userCtx, peer, OC_STACK_OK);
 420
 421             return OC_STACK_DELETE_TRANSACTION;
 422         }
 423         else
 424         {
 425             OIC_LOG(INFO, TAG, "Direct-Papring received error response.");
 426         }
 427     }
 428     else
 429     {
 430         OIC_LOG(ERROR, TAG, "DirectPairingFinalizeHandler received Null clientResponse");
 431     }
 432
 433     resultCallback(dpairData->userCtx, peer, OC_STACK_ERROR);
 434     OICFree(dpairData);
 435     return OC_STACK_DELETE_TRANSACTION;
 436 }
 437
 438 /**
 439  * Finalize direct-pairing .
 440  *
 441  * @param[in] peer  target device to establish direct-pairing.
 442  * @param[in] resultCallback  result event callback.
 443  *
 444  * @return OC_STACK_OK on success otherwise error.
 445  */
 446 OCStackResult FinalizeDirectPairing(void *ctx, OCDirectPairingDev_t* peer,
 447                                                      OCDirectPairingResultCB resultCallback)
 448 {
 449     if(NULL == peer)
 450     {
 451         return OC_STACK_INVALID_PARAM;
 452     }
 453
 454     OicUuid_t deviceID =   {.id={0}};
 455     if (OC_STACK_OK != GetDoxmDeviceID(&deviceID))
 456     {
 457         OIC_LOG(ERROR, TAG, "Error while retrieving device ID");
 458         return OC_STACK_ERROR;
 459     }
 460
 461     OicSecDpairing_t dpair;
 462     memset(&dpair, 0, sizeof(OicSecDpairing_t));
 463     dpair.spm = (OicSecPrm_t)PRM_NOT_ALLOWED;
 464     memcpy(&dpair.pdeviceID, &deviceID, sizeof(OicUuid_t));
 465
 466     OCSecurityPayload* secPayload = (OCSecurityPayload*)OICCalloc(1, sizeof(OCSecurityPayload));
 467     if(!secPayload)
 468     {
 469         OIC_LOG(ERROR, TAG, "Failed to memory allocation");
 470         return OC_STACK_NO_MEMORY;
 471     }
 472     secPayload->base.type = PAYLOAD_TYPE_SECURITY;
 473
 474     OCStackResult ret = DpairingToCBORPayload(&dpair, &(secPayload->securityData),
 475             &(secPayload->payloadSize));
 476
 477     if(OC_STACK_OK != ret)
 478     {
 479         OICFree(secPayload);
 480         OIC_LOG(ERROR, TAG, "Failed to DpairingToCBORPayload");
 481         return OC_STACK_NO_MEMORY;
 482     }
 483     OIC_LOG(DEBUG, TAG, "DPARING CBOR data:");
 484     OIC_LOG_BUFFER(DEBUG, TAG, secPayload->securityData, secPayload->payloadSize);
 485
 486     char query[MAX_URI_LENGTH + MAX_QUERY_LENGTH] = {0};
 487     if(!DPGenerateQuery(true,
 488                         peer->endpoint.addr,
 489                         peer->securePort,
 490                         peer->connType,
 491                         query, sizeof(query), OIC_RSRC_DPAIRING_URI))
 492     {
 493         OIC_LOG(ERROR, TAG, "DPDirectPairing : Failed to generate query");
 494         return OC_STACK_ERROR;
 495     }
 496     OIC_LOG_V(DEBUG, TAG, "Query=%s", query);
 497
 498     DPairData_t *dpairData = (DPairData_t *) OICCalloc(1, sizeof(DPairData_t));
 499     if (dpairData == NULL)
 500     {
 501         OICFree(secPayload->securityData);
 502         OICFree(secPayload);
 503         OIC_LOG(ERROR, TAG, "Unable to allocate memory");
 504         return OC_STACK_NO_MEMORY;
 505     }
 506     dpairData->peer = peer;
 507     dpairData->resultCallback = resultCallback;
 508     dpairData->userCtx = ctx;
 509
 510     OCCallbackData cbData =  {.context=NULL, .cb=NULL, .cd=NULL};
 511     cbData.cb = DirectPairingFinalizeHandler;
 512     cbData.context = (void*)dpairData;
 513     cbData.cd = NULL;
 514
 515     OCMethod method = OC_REST_PUT;
 516     OCDoHandle handle = NULL;
 517     OIC_LOG(DEBUG, TAG, "Sending DPAIRNG setting to resource server");
 518     ret = OCDoResource(&handle, method, query,
 519             &peer->endpoint, (OCPayload*)secPayload,
 520             peer->connType, OC_LOW_QOS, &cbData, NULL, 0);
 521     if(OC_STACK_OK != ret)
 522     {
 523         OIC_LOG(ERROR, TAG, "error in OCDoResource");
 524         return OC_STACK_ERROR;
 525     }
 526
 527     return OC_STACK_OK;
 528  }
 529
 530 /**
 531  * Function to handle the handshake result in Direct-Pairing.
 532  * This function will be invoked after DTLS handshake
 533  * @param   endPoint  [IN] The remote endpoint.
 534  * @param   errorInfo [IN] Error information from the endpoint.
 535  * @return  NONE
 536  */
 537 void DirectPairingDTLSHandshakeCB(const CAEndpoint_t *endpoint, const CAErrorInfo_t *info)
 538 {
 539     OIC_LOG_V(INFO, TAG, "IN DirectPairingDTLSHandshakeCB");
 540
 541
 542     if(g_dp_proceed_ctx && g_dp_proceed_ctx->peer && endpoint && info)
 543     {
 544         OIC_LOG_V(INFO, TAG, "Received status from remote device(%s:%d) : %d",
 545                  endpoint->addr, endpoint->port, info->result);
 546
 547         OCDirectPairingDev_t *peer = g_dp_proceed_ctx->peer;
 548         OCDirectPairingResultCB resultCallback = g_dp_proceed_ctx->resultCallback;
 549         OCStackResult res;
 550
 551         //Make sure the address matches.
 552         if(strncmp(peer->endpoint.addr, endpoint->addr, sizeof(endpoint->addr)) == 0 &&
 553                          peer->securePort == endpoint->port)
 554         {
 555             //In case of success, send next coaps request.
 556             if(CA_STATUS_OK == info->result)
 557             {
 558                 OIC_LOG(INFO, TAG, "Now, finalize Direct-Pairing procedure.");
 559
 560                 res = FinalizeDirectPairing(g_dp_proceed_ctx->userCtx, peer, resultCallback);
 561                 if(OC_STACK_OK != res)
 562                 {
 563                     OIC_LOG(ERROR, TAG, "Failed to finalize direct-pairing");
 564                     resultCallback(g_dp_proceed_ctx->userCtx, peer, res);
 565                 }
 566             }
 567             else if(CA_DTLS_AUTHENTICATION_FAILURE == info->result)
 568             {
 569                 OIC_LOG(INFO, TAG, "DirectPairingDTLSHandshakeCB - Authentication failed");
 570                 resultCallback(g_dp_proceed_ctx->userCtx, peer, OC_STACK_AUTHENTICATION_FAILURE);
 571             }
 572
 573 #if defined(__WITH_DTLS__) || defined(__WITH_TLS__)
 574             CAregisterSslHandshakeCallback(NULL);
 575 #endif // __WITH_DTLS__ or __WITH_TLS__
 576             res = RemoveCredential(&peer->deviceID);
 577             if(OC_STACK_RESOURCE_DELETED != res)
 578             {
 579                 OIC_LOG_V(ERROR, TAG, "Failed to remove temporal PSK : %d", res);
 580             }
 581
 582             OICFree(g_dp_proceed_ctx);
 583             g_dp_proceed_ctx = NULL;
 584         }
 585         else
 586         {
 587             OIC_LOG_V(INFO, TAG, "DirectPairingDTLSHandshakeCB - Not matched to peer address");
 588         }
 589     }
 590
 591     OIC_LOG_V(INFO, TAG, "OUT DirectPairingDTLSHandshakeCB");
 592 }
 593
 594 /**
 595  * Callback handler of DPDirectPairing.
 596  *
 597  * @param[in] ctx             ctx value passed to callback from calling function.
 598  * @param[in] UNUSED          handle to an invocation
 599  * @param[in] clientResponse  Response from queries to remote servers.
 600  * @return  OC_STACK_DELETE_TRANSACTION to delete the transaction
 601  *          and  OC_STACK_KEEP_TRANSACTION to keep it.
 602  */
 603 static OCStackApplicationResult DirectPairingHandler(void *ctx, OCDoHandle UNUSED,
 604                                                   OCClientResponse *clientResponse)
 605 {
 606     OIC_LOG_V(INFO, TAG, "IN DirectPairingHandler.");
 607     (void)UNUSED;
 608     if(NULL == ctx)
 609     {
 610         OIC_LOG(ERROR, TAG, "Context is Null");
 611         return OC_STACK_DELETE_TRANSACTION;
 612     }
 613
 614     OCStackResult res = OC_STACK_ERROR;
 615     DPairData_t *dpairData = (DPairData_t*)ctx;
 616     OCDirectPairingResultCB resultCallback = (OCDirectPairingResultCB)dpairData->resultCallback;
 617     OicUuid_t subjectId = {.id={0}};
 618
 619     if (clientResponse)
 620     {
 621         if(OC_STACK_RESOURCE_CHANGED == clientResponse->result)
 622         {
 623             // result
 624             OIC_LOG(INFO, TAG, "DirectPairingHandler : success POST request to /oic/sec/dpairing");
 625
 626 #if defined(__WITH_DTLS__) || defined(__WITH_TLS__)
 627             // Add temporary psk
 628             res = AddTmpPskWithPIN(&dpairData->peer->deviceID,
 629                            SYMMETRIC_PAIR_WISE_KEY,
 630                            (char*)dpairData->pin, DP_PIN_LENGTH,
 631                            &dpairData->peer->rowner, &subjectId);
 632             VERIFY_SUCCESS(TAG, OC_STACK_OK == res, ERROR);
 633
 634
 635             // Start to establish a secure channel with Pin-based PSK cipher suite
 636             CAResult_t caresult;
 637
 638             caresult = CAEnableAnonECDHCipherSuite(false);
 639             VERIFY_SUCCESS(TAG, CA_STATUS_OK == caresult, ERROR);
 640
 641             caresult = CASelectCipherSuite(TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA_256, CA_ADAPTER_IP);
 642             VERIFY_SUCCESS(TAG, CA_STATUS_OK == caresult, ERROR);
 643
 644             //Register proceeding peer info. & DTLS event handler to catch the dtls event while handshake
 645             g_dp_proceed_ctx = dpairData;
 646             res = CAregisterSslHandshakeCallback(DirectPairingDTLSHandshakeCB);
 647             VERIFY_SUCCESS(TAG, CA_STATUS_OK == caresult, ERROR);
 648
 649             // initiate dtls
 650             CAEndpoint_t *endpoint = (CAEndpoint_t *)OICCalloc(1, sizeof (CAEndpoint_t));
 651             VERIFY_NON_NULL(TAG, endpoint, FATAL);
 652             memcpy(endpoint,&dpairData->peer->endpoint,sizeof(CAEndpoint_t));
 653             endpoint->port = dpairData->peer->securePort;
 654             OIC_LOG_V(INFO, TAG, "Initiate DTLS handshake to %s(%d)", endpoint->addr,
 655                     endpoint->port);
 656
 657             caresult = CAInitiateHandshake(endpoint);
 658             OICFree(endpoint);
 659             VERIFY_SUCCESS(TAG, CA_STATUS_OK == caresult, ERROR);
 660 #endif // __WITH_DTLS__ or __WITH_TLS__
 661
 662             res = OC_STACK_OK;
 663         }
 664         else
 665         {
 666             // result
 667             OIC_LOG(INFO, TAG, "DirectPairingHandler : fail POST request to /oic/sec/dpairing");
 668         }
 669     }
 670     else
 671     {
 672         OIC_LOG(ERROR, TAG, "DirectPairingHandler received Null clientResponse");
 673     }
 674
 675 #if defined(__WITH_DTLS__) || defined(__WITH_TLS__)
 676 exit:
 677 #endif // __WITH_DTLS__ or __WITH_TLS__
 678
 679     if (OC_STACK_OK != res)
 680     {
 681         if (0 < strlen((const char*)subjectId.id))
 682         {
 683             RemoveCredential(&dpairData->peer->deviceID);
 684             OICFree(dpairData);
 685             g_dp_proceed_ctx = NULL;
 686         }
 687
 688         resultCallback(dpairData->userCtx, dpairData->peer, res);
 689     }
 690     OIC_LOG_V(INFO, TAG, "OUT DirectPairingHandler.");
 691     return OC_STACK_DELETE_TRANSACTION;
 692 }
 693
 694 /**
 695  * Start direct-pairing .
 696  *
 697  * @param[in] peer  target device to establish direct-pairing.
 698  * @param[in] pmSel  selected pairing method.
 699  * @param[in] pinNumber  secret value for dtls connection.
 700  *
 701  * @return OC_STACK_OK on success otherwise error.
 702  */
 703 OCStackResult DPDirectPairing(void *ctx, OCDirectPairingDev_t* peer, OicSecPrm_t pmSel,
 704                                 char *pinNumber, OCDirectPairingResultCB resultCallback)
 705 {
 706     if(NULL == peer || NULL == pinNumber)
 707     {
 708         return OC_STACK_INVALID_PARAM;
 709     }
 710
 711     OicUuid_t deviceID =   {.id={0}};
 712     if (OC_STACK_OK != GetDoxmDeviceID(&deviceID))
 713     {
 714         OIC_LOG(ERROR, TAG, "Error while retrieving device ID");
 715         return OC_STACK_ERROR;
 716     }
 717
 718     OicSecDpairing_t dpair;
 719     memset(&dpair, 0, sizeof(OicSecDpairing_t));
 720     dpair.spm = pmSel;
 721     memcpy(&dpair.pdeviceID, &deviceID, sizeof(OicUuid_t));
 722
 723     OCSecurityPayload* secPayload = (OCSecurityPayload*)OICCalloc(1, sizeof(OCSecurityPayload));
 724     if(!secPayload)
 725     {
 726         OIC_LOG(ERROR, TAG, "Failed to memory allocation");
 727         return OC_STACK_NO_MEMORY;
 728     }
 729     secPayload->base.type = PAYLOAD_TYPE_SECURITY;
 730
 731     OCStackResult ret = DpairingToCBORPayload(&dpair, &(secPayload->securityData),
 732             &(secPayload->payloadSize));
 733
 734     if(OC_STACK_OK != ret)
 735     {
 736         OICFree(secPayload);
 737         OIC_LOG(ERROR, TAG, "Failed to DpairingToCBORPayload");
 738         return OC_STACK_NO_MEMORY;
 739     }
 740     OIC_LOG(DEBUG, TAG, "DPARING CBOR data:");
 741     OIC_LOG_BUFFER(DEBUG, TAG, secPayload->securityData, secPayload->payloadSize);
 742
 743     char query[MAX_URI_LENGTH + MAX_QUERY_LENGTH] = {0};
 744     if(!DPGenerateQuery(false,
 745                         peer->endpoint.addr,
 746                         peer->endpoint.port,
 747                         //peer->securePort,
 748                         peer->connType,
 749                         query, sizeof(query), OIC_RSRC_DPAIRING_URI))
 750     {
 751         OIC_LOG(ERROR, TAG, "DPDirectPairing : Failed to generate query");
 752         return OC_STACK_ERROR;
 753     }
 754     OIC_LOG_V(DEBUG, TAG, "Query=%s", query);
 755
 756     DPairData_t *dpairData = (DPairData_t *) OICCalloc(1, sizeof(DPairData_t));
 757     if (dpairData == NULL)
 758     {
 759         OICFree(secPayload->securityData);
 760         OICFree(secPayload);
 761         OIC_LOG(ERROR, TAG, "Unable to allocate memory");
 762         return OC_STACK_NO_MEMORY;
 763     }
 764     dpairData->peer = peer;
 765     memcpy(dpairData->pin, pinNumber, DP_PIN_LENGTH);
 766     dpairData->resultCallback = resultCallback;
 767     dpairData->userCtx = ctx;
 768
 769     OCCallbackData cbData =  {.context=NULL, .cb=NULL, .cd=NULL};
 770     cbData.cb = DirectPairingHandler;
 771     cbData.context = (void*)dpairData;
 772     cbData.cd = NULL;
 773
 774     OCMethod method = OC_REST_POST;
 775     OCDoHandle handle = NULL;
 776     OIC_LOG(DEBUG, TAG, "Sending DPAIRNG setting to resource server");
 777     ret = OCDoResource(&handle, method, query,
 778             &peer->endpoint, (OCPayload*)secPayload,
 779             peer->connType, OC_LOW_QOS, &cbData, NULL, 0);
 780     if(OC_STACK_OK != ret)
 781     {
 782         OIC_LOG(ERROR, TAG, "error in OCDoResource");
 783         return OC_STACK_ERROR;
 784     }
 785
 786     return OC_STACK_OK;
 787
 788  }
 789
 790 /**
 791  * Callback handler for getting secure port information using /oic/res discovery.
 792  *
 793  * @param[in] ctx             user context
 794  * @param[in] handle          Handle for response
 795  * @param[in] clientResponse  Response information(It will contain payload)
 796  *
 797  * @return OC_STACK_KEEP_TRANSACTION to keep transaction and
 798  *         OC_STACK_DELETE_TRANSACTION to delete it.
 799  */
 800 static OCStackApplicationResult DirectPairingPortDiscoveryHandler(void *ctx, OCDoHandle UNUSED,
 801                                  OCClientResponse *clientResponse)
 802 {
 803     OIC_LOG(INFO, TAG, "Callback Context for Direct-Pairing Secure Port DISCOVER "
 804             "query recvd successfully");
 805
 806     (void)ctx;
 807     (void)UNUSED;
 808     if (clientResponse)
 809     {
 810         if  (NULL == clientResponse->payload)
 811         {
 812             OIC_LOG(INFO, TAG, "Skiping Null payload");
 813         }
 814         else
 815         {
 816             if (PAYLOAD_TYPE_DISCOVERY != clientResponse->payload->type)
 817             {
 818                 OIC_LOG(INFO, TAG, "Wrong payload type");
 819                 return OC_STACK_DELETE_TRANSACTION;
 820             }
 821
 822             uint16_t securePort = 0;
 823             OCResourcePayload* resPayload = ((OCDiscoveryPayload*)clientResponse->payload)->resources;
 824             OIC_LOG_PAYLOAD(INFO, clientResponse->payload);
 825
 826             if (resPayload && resPayload->secure)
 827             {
 828                 securePort = resPayload->port;
 829             }
 830             else
 831             {
 832                 OIC_LOG(INFO, TAG, "Can not find secure port information.");
 833                 return OC_STACK_DELETE_TRANSACTION;
 834             }
 835
 836             OCDirectPairingDev_t *ptr = getDev(&g_dp_discover,
 837                     clientResponse->devAddr.addr, clientResponse->devAddr.port);
 838             if(!ptr)
 839             {
 840                 OIC_LOG(ERROR, TAG, "Can not find device information in the discovery device list");
 841                 return OC_STACK_DELETE_TRANSACTION;
 842             }
 843             ptr->securePort = securePort;
 844
 845             OIC_LOG(INFO, TAG, "Exiting DirectPairingPortDiscoveryHandler.");
 846         }
 847
 848         return  OC_STACK_DELETE_TRANSACTION;
 849     }
 850     else
 851     {
 852         OIC_LOG(INFO, TAG, "Skiping Null response");
 853     }
 854     return  OC_STACK_DELETE_TRANSACTION;
 855 }
 856
 857 /**
 858  * Callback handler for DPDeviceDiscovery API.
 859  *
 860  * @param[in] ctx             User context
 861  * @param[in] handle          Handler for response
 862  * @param[in] clientResponse  Response information (It will contain payload)
 863  * @return OC_STACK_KEEP_TRANSACTION to keep transaction and
 864  *         OC_STACK_DELETE_TRANSACTION to delete it.
 865  */
 866 static OCStackApplicationResult DirectPairingDiscoveryHandler(void* ctx, OCDoHandle UNUSED,
 867         OCClientResponse * clientResponse)
 868 {
 869     OIC_LOG(INFO, TAG, "Callback Context for Direct-Pairing DISCOVER query recvd successfully");
 870
 871     (void)ctx;
 872     (void)UNUSED;
 873     if (clientResponse)
 874     {
 875         OIC_LOG_V(INFO, TAG, "StackResult: %d", clientResponse->result);
 876         OIC_LOG_V(INFO, TAG,
 877                 "Device =============> Discovered @ %s:%d",
 878                 clientResponse->devAddr.addr,
 879                 clientResponse->devAddr.port);
 880
 881         if  (NULL == clientResponse->payload)
 882         {
 883             OIC_LOG(INFO, TAG, "Skiping Null payload");
 884             return OC_STACK_KEEP_TRANSACTION;
 885         }
 886         if (OC_STACK_OK != clientResponse->result)
 887         {
 888             OIC_LOG(INFO, TAG, "Error in response");
 889             return OC_STACK_KEEP_TRANSACTION;
 890         }
 891
 892         OIC_LOG_PAYLOAD(INFO, clientResponse->payload);
 893         OicSecPconf_t *pconf = NULL;
 894
 895         OCStackResult res = CBORPayloadToPconf(
 896                 ((OCSecurityPayload*)clientResponse->payload)->securityData,
 897                 CBOR_SIZE,&pconf);
 898         if (OC_STACK_OK != res )
 899         {
 900             OIC_LOG(INFO, TAG, "Ignoring malformed CBOR");
 901             return OC_STACK_KEEP_TRANSACTION;
 902         }
 903         else
 904         {
 905             if(pconf->edp)
 906             {
 907                 OCDevAddr endpoint;
 908                 memcpy(&endpoint, &clientResponse->devAddr, sizeof(OCDevAddr));
 909
 910                 OCStackResult res = addDev(&g_dp_discover, &endpoint,
 911                             clientResponse->connType, pconf);
 912                 DeletePconfBinData(pconf);
 913                 if (OC_STACK_OK != res)
 914                 {
 915                     OIC_LOG(ERROR, TAG, "Error while adding data to linkedlist.");
 916                     return OC_STACK_KEEP_TRANSACTION;
 917                 }
 918
 919
 920                 char rsrc_uri[MAX_URI_LENGTH+1] = {0};
 921                 int wr_len = snprintf(rsrc_uri, sizeof(rsrc_uri), "%s?%s=%s",
 922                           OC_RSRVD_WELL_KNOWN_URI, OC_RSRVD_RESOURCE_TYPE, OIC_RSRC_TYPE_SEC_DPAIRING);
 923                 if(wr_len <= 0 || (size_t)wr_len >= sizeof(rsrc_uri))
 924                 {
 925                     OIC_LOG(ERROR, TAG, "rsrc_uri_string_print failed");
 926                     return OC_STACK_KEEP_TRANSACTION;
 927                 }
 928
 929                 //Try to the unicast discovery to getting secure port
 930                 char query[MAX_URI_LENGTH+MAX_QUERY_LENGTH+1] = {0};
 931                 if(!DPGenerateQuery(false,
 932                                     clientResponse->devAddr.addr, clientResponse->devAddr.port,
 933                                     clientResponse->connType,
 934                                     query, sizeof(query), rsrc_uri))
 935                 {
 936                     OIC_LOG(ERROR, TAG, "DirectPairingDiscoveryHandler : Failed to generate query");
 937                     return OC_STACK_KEEP_TRANSACTION;
 938                 }
 939                 OIC_LOG_V(DEBUG, TAG, "Query=%s", query);
 940
 941                 OCCallbackData cbData;
 942                 cbData.cb = &DirectPairingPortDiscoveryHandler;
 943                 cbData.context = NULL;
 944                 cbData.cd = NULL;
 945                 OCStackResult ret = OCDoResource(NULL, OC_REST_DISCOVER, query, 0, 0,
 946                         clientResponse->connType, OC_LOW_QOS, &cbData, NULL, 0);
 947                 if(OC_STACK_OK != ret)
 948                 {
 949                     OIC_LOG(ERROR, TAG, "Failed to Secure Port Discovery");
 950                     return OC_STACK_KEEP_TRANSACTION;
 951                 }
 952                 else
 953                 {
 954                     OIC_LOG_V(INFO, TAG, "OCDoResource with [%s] Success", query);
 955                 }
 956             }
 957             return  OC_STACK_KEEP_TRANSACTION;
 958         }
 959     }
 960     else
 961     {
 962         OIC_LOG(INFO, TAG, "Skiping Null response");
 963     }
 964
 965     return OC_STACK_DELETE_TRANSACTION;
 966 }
 967 #ifndef WITH_ARDUINO
 968 /**
 969  * Discover direct-pairing devices in the same IP subnet. .
 970  *
 971  * @param[in] waittime  Timeout in seconds.
 972  *
 973  * @return OC_STACK_OK on success otherwise error.
 974  */
 975 OCStackResult DPDeviceDiscovery(unsigned short waittime)
 976 {
 977     OIC_LOG(DEBUG, TAG, "IN DPDeviceDiscovery");
 978
 979     if (g_dp_discover)
 980     {
 981         delList(g_dp_discover);
 982         g_dp_discover = NULL;
 983     }
 984
 985     OCStackResult ret;
 986
 987     const char DP_DISCOVERY_QUERY[] = "/oic/sec/pconf";
 988
 989     OCCallbackData cbData;
 990     cbData.cb = DirectPairingDiscoveryHandler;
 991     cbData.context = NULL;
 992     cbData.cd = NULL;
 993
 994     /* Start a DP discovery query*/
 995     OIC_LOG_V(INFO, TAG, "Initiating Direct-Pairing Discovery : %s\n", DP_DISCOVERY_QUERY);
 996     OCDoHandle handle = NULL;
 997     ret = OCDoResource(&handle, OC_REST_DISCOVER, DP_DISCOVERY_QUERY, 0, 0, CT_DEFAULT,
 998                        OC_LOW_QOS, &cbData, NULL, 0);
 999     if (ret != OC_STACK_OK)
1000     {
1001         OIC_LOG(ERROR, TAG, "OCStack resource error");
1002         return ret;
1003     }
1004
1005     // wait..
1006
1007     int clock_res = -1;
1008 #if defined(_MSC_VER)
1009     time_t startTime = NULL;
1010     clock_res = (time(&startTime) == -1);
1011 #else
1012     struct timespec startTime = {.tv_sec=0, .tv_nsec=0};
1013 #if defined(__ANDROID__) || _POSIX_TIMERS > 0
1014     clock_res = clock_gettime(CLOCK_MONOTONIC, &startTime);
1015 #endif
1016 #endif
1017     if (0 != clock_res)
1018     {
1019         OIC_LOG(ERROR, TAG, "clock error");
1020         if(OC_STACK_OK !=  OCCancel(handle, OC_LOW_QOS, NULL, 0))
1021         {
1022             OIC_LOG(ERROR, TAG, "Failed to remove registered callback");
1023         }
1024         return OC_STACK_ERROR;
1025     }
1026
1027     while (1)
1028     {
1029 #if defined(_MSC_VER)
1030         time_t currTime = NULL;
1031         clock_res = (time(&currTime) == -1);
1032 #else
1033         struct timespec currTime  = {.tv_sec=0, .tv_nsec=0};
1034 #if defined(__ANDROID__) || _POSIX_TIMERS > 0
1035         clock_res = clock_gettime(CLOCK_MONOTONIC, &currTime);
1036 #endif
1037 #endif
1038         if (0 != clock_res)
1039         {
1040             OIC_LOG(ERROR, TAG, "clock error");
1041             ret = OC_STACK_ERROR;
1042             break;
1043         }
1044 #if defined(_MSC_VER)
1045         long elapsed = currTime - startTime;
1046 #else
1047         long elapsed = (currTime.tv_sec - startTime.tv_sec);
1048 #endif
1049         if (elapsed > waittime)
1050         {
1051             break;
1052         }
1053         else
1054         {
1055             struct timespec timeout = {.tv_sec=0, .tv_nsec=100000000L};
1056             OCProcess();
1057             nanosleep(&timeout, NULL);
1058         }
1059     }
1060
1061     // Waiting for each response.
1062     ret = OCCancel(handle, OC_LOW_QOS, NULL, 0);
1063     if (OC_STACK_OK != ret)
1064     {
1065         OIC_LOG(ERROR, TAG, "Failed to remove registered callback");
1066     }
1067     OIC_LOG(DEBUG, TAG, "OUT DPDeviceDiscovery");
1068     return ret;
1069 }
1070 #endif