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 #if defined (__TIZENRT__)
  42 #include <apps/netutils/cJSON.h>
  43 #else
  44 #include "cJSON.h"
  45 #endif
  46 #include "utlist.h"
  47 #include "ocpayload.h"
  48 #include "payload_logging.h"
  49 #include "cainterface.h"
  50
  51 #include "directpairing.h"
  52 #include "srmresourcestrings.h" //@note: SRM's internal header
  53 #include "doxmresource.h"       //@note: SRM's internal header
  54 #include "pconfresource.h"       //@note: SRM's internal header
  55 #include "dpairingresource.h"       //@note: SRM's internal header
  56 #include "credresource.h"
  57
  58 #include "pmtypes.h"
  59 #include "pmutility.h"
  60
  61 #include "srmutility.h"
  62
  63 #define TAG ("OIC_DP")
  64 static const uint16_t CBOR_SIZE = 1024;
  65
  66 /**
  67  * Structure to carry direct-pairing API data to callback.
  68  */
  69 typedef struct DPairData
  70 {
  71     OCDirectPairingDev_t        *peer;                         /**< Pointer to pairing target info.**/
  72     char                                  pin[DP_PIN_LENGTH];  /**< PIN **/
  73     OCDirectPairingResultCB    resultCallback;           /**< Pointer to result callback.**/
  74     void *userCtx;                                      /** < user context to pass in callback **/
  75 } DPairData_t;
  76
  77 static OCDirectPairingDev_t *g_dp_paired = NULL;
  78 static OCDirectPairingDev_t *g_dp_discover = NULL;
  79 static DPairData_t *g_dp_proceed_ctx = NULL;
  80
  81
  82 /**
  83  * Function to search node in linked list that matches given IP and port.
  84  *
  85  * @param[in] pList         List of OCProvisionDev_t.
  86  * @param[in] addr          address of target device.
  87  * @param[in] port          port of remote server.
  88  *
  89  * @return pointer of OCProvisionDev_t if exist, otherwise NULL
  90  */
  91 OCDirectPairingDev_t* getDev(OCDirectPairingDev_t **ppList, const char* addr, const uint16_t port)
  92 {
  93     if(NULL == addr)
  94     {
  95         OIC_LOG_V(ERROR, TAG, "Invalid Input parameters in [%s]\n", __FUNCTION__);
  96         return NULL;
  97     }
  98
  99     OCDirectPairingDev_t *ptr = NULL;
 100     LL_FOREACH(*ppList, ptr)
 101     {
 102         if( strcmp(ptr->endpoint.addr, addr) == 0 && port == ptr->endpoint.port)
 103         {
 104             return ptr;
 105         }
 106     }
 107
 108     return NULL;
 109 }
 110
 111
 112
 113 /**
 114  * Add device information to list.
 115  *
 116  * @param[in] pList         List of OCProvisionDev_t.
 117  * @param[in] addr          address of target device.
 118  * @param[in] port          port of remote server.
 119  * @param[in] adapter       adapter type of endpoint.
 120  * @param[in] doxm          pointer to doxm instance.
 121  * @param[in] connType  connectivity type of endpoint
 122  *
 123  * @return OC_STACK_OK for success and errorcode otherwise.
 124  */
 125 OCStackResult addDev(OCDirectPairingDev_t **ppList, OCDevAddr *endpoint,
 126                                       OCConnectivityType conn, OicSecPconf_t *pconf)
 127 {
 128     if(NULL == endpoint || NULL == pconf)
 129     {
 130         OIC_LOG_V(ERROR, TAG, "Invalid Input parameters in [%s]\n", __FUNCTION__);
 131         return OC_STACK_INVALID_PARAM;
 132     }
 133
 134     OCDirectPairingDev_t *ptr = getDev(ppList, endpoint->addr, endpoint->port);
 135     if(!ptr)
 136     {
 137         ptr = (OCDirectPairingDev_t *)OICCalloc(1, sizeof (OCDirectPairingDev_t));
 138         if (NULL == ptr)
 139         {
 140             OIC_LOG(ERROR, TAG, "Error while allocating memory for linkedlist node !!");
 141             return OC_STACK_NO_MEMORY;
 142         }
 143
 144         memcpy(&ptr->endpoint, endpoint, sizeof(OCDevAddr));
 145         ptr->connType = conn;
 146         ptr->securePort = DEFAULT_SECURE_PORT;
 147         ptr->edp = pconf->edp;
 148         ptr->prm = pconf->prm;
 149         pconf->prm = NULL;  // to prevent free
 150         ptr->prmLen = pconf->prmLen;
 151         memcpy(&ptr->deviceID, &pconf->deviceID, sizeof(OicUuid_t));
 152         memcpy(&ptr->rowner, &pconf->rownerID, sizeof(OicUuid_t));
 153         ptr->next = NULL;
 154
 155         LL_PREPEND(*ppList, ptr);
 156         OIC_LOG(INFO, TAG, "device added !");
 157     }
 158
 159     return OC_STACK_OK;
 160 }
 161
 162
 163 /**
 164  * Add device information to list.
 165  *
 166  * @param[in] ppList         List of OCProvisionDev_t.
 167  * @param[in] pDev          target device.
 168  *
 169  * @return OC_STACK_OK for success and errorcode otherwise.
 170  */
 171 OCStackResult addDev2(OCDirectPairingDev_t **ppList, OCDirectPairingDev_t *pDev)
 172 {
 173     if(NULL == pDev)
 174     {
 175         OIC_LOG_V(ERROR, TAG, "Invalid Input parameters in [%s]\n", __FUNCTION__);
 176         return OC_STACK_INVALID_PARAM;
 177     }
 178
 179     OCDirectPairingDev_t *ptr = getDev(ppList, pDev->endpoint.addr, pDev->endpoint.port);
 180     if(!ptr)
 181     {
 182         ptr = (OCDirectPairingDev_t *)OICCalloc(1, sizeof (OCDirectPairingDev_t));
 183         if (NULL == ptr)
 184         {
 185             OIC_LOG(ERROR, TAG, "Error while allocating memory for linkedlist node !!");
 186             return OC_STACK_NO_MEMORY;
 187         }
 188
 189         memcpy(&ptr->endpoint, &pDev->endpoint, sizeof(OCDevAddr));
 190         ptr->connType = pDev->connType;
 191         ptr->securePort = pDev->securePort;
 192         ptr->edp = pDev->edp;
 193         ptr->prmLen = pDev->prmLen;
 194         ptr->prm = (OicSecPrm_t*)OICCalloc(ptr->prmLen, sizeof (OicSecPrm_t));
 195         if (NULL == ptr->prm)
 196         {
 197             OIC_LOG(ERROR, TAG, "Error while allocating memory for prm !!");
 198             OICFree(ptr);
 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 #endif // __WITH_DTLS__ or __WITH_TLS__
 401
 402             OIC_LOG(INFO, TAG, "Direct-Papring was successfully completed.");
 403
 404             // update paired list
 405             OCDirectPairingDev_t *dev = getDev(&g_dp_discover, peer->endpoint.addr,
 406                     peer->endpoint.port);
 407             res = addDev2(&g_dp_paired, dev);
 408             if (OC_STACK_OK != res)
 409             {
 410                 OIC_LOG(ERROR, TAG, "Error while adding a device to paired list.");
 411             }
 412
 413             resultCallback(dpairData->userCtx, peer, OC_STACK_OK);
 414
 415             return OC_STACK_DELETE_TRANSACTION;
 416         }
 417         else
 418         {
 419             OIC_LOG(INFO, TAG, "Direct-Papring received error response.");
 420         }
 421     }
 422     else
 423     {
 424         OIC_LOG(ERROR, TAG, "DirectPairingFinalizeHandler received Null clientResponse");
 425     }
 426
 427     resultCallback(dpairData->userCtx, peer, OC_STACK_ERROR);
 428     OICFree(dpairData);
 429     return OC_STACK_DELETE_TRANSACTION;
 430 }
 431
 432 /**
 433  * Finalize direct-pairing .
 434  *
 435  * @param[in] peer  target device to establish direct-pairing.
 436  * @param[in] resultCallback  result event callback.
 437  *
 438  * @return OC_STACK_OK on success otherwise error.
 439  */
 440 OCStackResult FinalizeDirectPairing(void *ctx, OCDirectPairingDev_t* peer,
 441                                                      OCDirectPairingResultCB resultCallback)
 442 {
 443     if(NULL == peer)
 444     {
 445         return OC_STACK_INVALID_PARAM;
 446     }
 447
 448     OicUuid_t deviceID =   {.id={0}};
 449     if (OC_STACK_OK != GetDoxmDeviceID(&deviceID))
 450     {
 451         OIC_LOG(ERROR, TAG, "Error while retrieving device ID");
 452         return OC_STACK_ERROR;
 453     }
 454
 455     OicSecDpairing_t dpair;
 456     memset(&dpair, 0, sizeof(OicSecDpairing_t));
 457     dpair.spm = (OicSecPrm_t)PRM_NOT_ALLOWED;
 458     memcpy(&dpair.pdeviceID, &deviceID, sizeof(OicUuid_t));
 459
 460     OCSecurityPayload* secPayload = (OCSecurityPayload*)OICCalloc(1, sizeof(OCSecurityPayload));
 461     if(!secPayload)
 462     {
 463         OIC_LOG(ERROR, TAG, "Failed to memory allocation");
 464         return OC_STACK_NO_MEMORY;
 465     }
 466     secPayload->base.type = PAYLOAD_TYPE_SECURITY;
 467
 468     OCStackResult ret = DpairingToCBORPayload(&dpair, &(secPayload->securityData),
 469             &(secPayload->payloadSize));
 470
 471     if(OC_STACK_OK != ret)
 472     {
 473         OICFree(secPayload);
 474         OIC_LOG(ERROR, TAG, "Failed to DpairingToCBORPayload");
 475         return OC_STACK_NO_MEMORY;
 476     }
 477     OIC_LOG(DEBUG, TAG, "DPARING CBOR data:");
 478     OIC_LOG_BUFFER(DEBUG, TAG, secPayload->securityData, secPayload->payloadSize);
 479
 480     char query[MAX_URI_LENGTH + MAX_QUERY_LENGTH] = {0};
 481     if(!DPGenerateQuery(true,
 482                         peer->endpoint.addr,
 483                         peer->securePort,
 484                         peer->connType,
 485                         query, sizeof(query), OIC_RSRC_DPAIRING_URI))
 486     {
 487         OIC_LOG(ERROR, TAG, "DPDirectPairing : Failed to generate query");
 488         return OC_STACK_ERROR;
 489     }
 490     OIC_LOG_V(DEBUG, TAG, "Query=%s", query);
 491
 492     DPairData_t *dpairData = (DPairData_t *) OICCalloc(1, sizeof(DPairData_t));
 493     if (dpairData == NULL)
 494     {
 495         OICFree(secPayload->securityData);
 496         OICFree(secPayload);
 497         OIC_LOG(ERROR, TAG, "Unable to allocate memory");
 498         return OC_STACK_NO_MEMORY;
 499     }
 500     dpairData->peer = peer;
 501     dpairData->resultCallback = resultCallback;
 502     dpairData->userCtx = ctx;
 503
 504     OCCallbackData cbData =  {.context=NULL, .cb=NULL, .cd=NULL};
 505     cbData.cb = DirectPairingFinalizeHandler;
 506     cbData.context = (void*)dpairData;
 507     cbData.cd = NULL;
 508
 509     OCMethod method = OC_REST_PUT;
 510     OCDoHandle handle = NULL;
 511     OIC_LOG(DEBUG, TAG, "Sending DPAIRNG setting to resource server");
 512     ret = OCDoResource(&handle, method, query,
 513             &peer->endpoint, (OCPayload*)secPayload,
 514             peer->connType, OC_LOW_QOS, &cbData, NULL, 0);
 515     if(OC_STACK_OK != ret)
 516     {
 517         OIC_LOG(ERROR, TAG, "error in OCDoResource");
 518         return OC_STACK_ERROR;
 519     }
 520
 521     return OC_STACK_OK;
 522  }
 523
 524 /**
 525  * Function to handle the handshake result in Direct-Pairing.
 526  * This function will be invoked after DTLS handshake
 527  * @param   endPoint  [IN] The remote endpoint.
 528  * @param   errorInfo [IN] Error information from the endpoint.
 529  * @return  NONE
 530  */
 531 void DirectPairingDTLSHandshakeCB(const CAEndpoint_t *endpoint, const CAErrorInfo_t *info)
 532 {
 533     OIC_LOG_V(INFO, TAG, "IN DirectPairingDTLSHandshakeCB");
 534
 535
 536     if(g_dp_proceed_ctx && g_dp_proceed_ctx->peer && endpoint && info)
 537     {
 538         OIC_LOG_V(INFO, TAG, "Received status from remote device(%s:%d) : %d",
 539                  endpoint->addr, endpoint->port, info->result);
 540
 541         OCDirectPairingDev_t *peer = g_dp_proceed_ctx->peer;
 542         OCDirectPairingResultCB resultCallback = g_dp_proceed_ctx->resultCallback;
 543         OCStackResult res;
 544
 545         //Make sure the address matches.
 546         if(strncmp(peer->endpoint.addr, endpoint->addr, sizeof(endpoint->addr)) == 0 &&
 547                          peer->securePort == endpoint->port)
 548         {
 549             //In case of success, send next coaps request.
 550             if(CA_STATUS_OK == info->result)
 551             {
 552                 OIC_LOG(INFO, TAG, "Now, finalize Direct-Pairing procedure.");
 553
 554                 res = FinalizeDirectPairing(g_dp_proceed_ctx->userCtx, peer, resultCallback);
 555                 if(OC_STACK_OK != res)
 556                 {
 557                     OIC_LOG(ERROR, TAG, "Failed to finalize direct-pairing");
 558                     resultCallback(g_dp_proceed_ctx->userCtx, peer, res);
 559                 }
 560             }
 561             else if(CA_DTLS_AUTHENTICATION_FAILURE == info->result)
 562             {
 563                 OIC_LOG(INFO, TAG, "DirectPairingDTLSHandshakeCB - Authentication failed");
 564                 resultCallback(g_dp_proceed_ctx->userCtx, peer, OC_STACK_AUTHENTICATION_FAILURE);
 565             }
 566
 567 #if defined(__WITH_DTLS__) || defined(__WITH_TLS__)
 568             CAregisterSslHandshakeCallback(NULL);
 569 #endif // __WITH_DTLS__ or __WITH_TLS__
 570             res = RemoveCredential(&peer->deviceID);
 571             if(OC_STACK_RESOURCE_DELETED != res)
 572             {
 573                 OIC_LOG_V(ERROR, TAG, "Failed to remove temporal PSK : %d", res);
 574             }
 575
 576             OICFree(g_dp_proceed_ctx);
 577             g_dp_proceed_ctx = NULL;
 578         }
 579         else
 580         {
 581             OIC_LOG_V(INFO, TAG, "DirectPairingDTLSHandshakeCB - Not matched to peer address");
 582         }
 583     }
 584
 585     OIC_LOG_V(INFO, TAG, "OUT DirectPairingDTLSHandshakeCB");
 586 }
 587
 588 /**
 589  * Callback handler of DPDirectPairing.
 590  *
 591  * @param[in] ctx             ctx value passed to callback from calling function.
 592  * @param[in] UNUSED          handle to an invocation
 593  * @param[in] clientResponse  Response from queries to remote servers.
 594  * @return  OC_STACK_DELETE_TRANSACTION to delete the transaction
 595  *          and  OC_STACK_KEEP_TRANSACTION to keep it.
 596  */
 597 static OCStackApplicationResult DirectPairingHandler(void *ctx, OCDoHandle UNUSED,
 598                                                   OCClientResponse *clientResponse)
 599 {
 600     OIC_LOG_V(INFO, TAG, "IN DirectPairingHandler.");
 601     (void)UNUSED;
 602     if(NULL == ctx)
 603     {
 604         OIC_LOG(ERROR, TAG, "Context is Null");
 605         return OC_STACK_DELETE_TRANSACTION;
 606     }
 607
 608     OCStackResult res = OC_STACK_ERROR;
 609     DPairData_t *dpairData = (DPairData_t*)ctx;
 610     OCDirectPairingResultCB resultCallback = (OCDirectPairingResultCB)dpairData->resultCallback;
 611     OicUuid_t subjectId = {.id={0}};
 612
 613     if (clientResponse)
 614     {
 615         if(OC_STACK_RESOURCE_CHANGED == clientResponse->result)
 616         {
 617             // result
 618             OIC_LOG(INFO, TAG, "DirectPairingHandler : success POST request to /oic/sec/dpairing");
 619
 620 #if defined(__WITH_DTLS__) || defined(__WITH_TLS__)
 621             // Add temporary psk
 622             res = AddTmpPskWithPIN(&dpairData->peer->deviceID,
 623                            SYMMETRIC_PAIR_WISE_KEY,
 624                            (char*)dpairData->pin, DP_PIN_LENGTH,
 625                            &dpairData->peer->rowner, &subjectId);
 626             VERIFY_SUCCESS(TAG, OC_STACK_OK == res, ERROR);
 627
 628
 629             // Start to establish a secure channel with Pin-based PSK cipher suite
 630             CAResult_t caresult;
 631
 632             caresult = CAEnableAnonECDHCipherSuite(false);
 633             VERIFY_SUCCESS(TAG, CA_STATUS_OK == caresult, ERROR);
 634
 635             caresult = CASelectCipherSuite(MBEDTLS_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256, CA_ADAPTER_IP);
 636             VERIFY_SUCCESS(TAG, CA_STATUS_OK == caresult, ERROR);
 637
 638             //Register proceeding peer info. & DTLS event handler to catch the dtls event while handshake
 639             g_dp_proceed_ctx = dpairData;
 640             res = CAregisterSslHandshakeCallback(DirectPairingDTLSHandshakeCB);
 641             VERIFY_SUCCESS(TAG, CA_STATUS_OK == caresult, ERROR);
 642
 643             // initiate dtls
 644             CAEndpoint_t *endpoint = (CAEndpoint_t *)OICCalloc(1, sizeof (CAEndpoint_t));
 645             VERIFY_NON_NULL(TAG, endpoint, FATAL);
 646             memcpy(endpoint,&dpairData->peer->endpoint,sizeof(CAEndpoint_t));
 647             endpoint->port = dpairData->peer->securePort;
 648             OIC_LOG_V(INFO, TAG, "Initiate DTLS handshake to %s(%d)", endpoint->addr,
 649                     endpoint->port);
 650
 651             caresult = CAInitiateHandshake(endpoint);
 652             OICFree(endpoint);
 653             VERIFY_SUCCESS(TAG, CA_STATUS_OK == caresult, ERROR);
 654 #endif // __WITH_DTLS__ or __WITH_TLS__
 655
 656             res = OC_STACK_OK;
 657         }
 658         else
 659         {
 660             // result
 661             OIC_LOG(INFO, TAG, "DirectPairingHandler : fail POST request to /oic/sec/dpairing");
 662         }
 663     }
 664     else
 665     {
 666         OIC_LOG(ERROR, TAG, "DirectPairingHandler received Null clientResponse");
 667     }
 668
 669 #if defined(__WITH_DTLS__) || defined(__WITH_TLS__)
 670 exit:
 671 #endif // __WITH_DTLS__ or __WITH_TLS__
 672
 673     if (OC_STACK_OK != res)
 674     {
 675         if (0 < strlen((const char*)subjectId.id))
 676         {
 677             RemoveCredential(&dpairData->peer->deviceID);
 678             OICFree(dpairData);
 679             g_dp_proceed_ctx = NULL;
 680             OIC_LOG_V(INFO, TAG, "OUT DirectPairingHandler.");
 681             return OC_STACK_DELETE_TRANSACTION;
 682         }
 683
 684         resultCallback(dpairData->userCtx, dpairData->peer, res);
 685     }
 686     OIC_LOG_V(INFO, TAG, "OUT DirectPairingHandler.");
 687     return OC_STACK_DELETE_TRANSACTION;
 688 }
 689
 690 /**
 691  * Start direct-pairing .
 692  *
 693  * @param[in] peer  target device to establish direct-pairing.
 694  * @param[in] pmSel  selected pairing method.
 695  * @param[in] pinNumber  secret value for dtls connection.
 696  *
 697  * @return OC_STACK_OK on success otherwise error.
 698  */
 699 OCStackResult DPDirectPairing(void *ctx, OCDirectPairingDev_t* peer, OicSecPrm_t pmSel,
 700                                 char *pinNumber, OCDirectPairingResultCB resultCallback)
 701 {
 702     if(NULL == peer || NULL == pinNumber)
 703     {
 704         return OC_STACK_INVALID_PARAM;
 705     }
 706
 707     OicUuid_t deviceID =   {.id={0}};
 708     if (OC_STACK_OK != GetDoxmDeviceID(&deviceID))
 709     {
 710         OIC_LOG(ERROR, TAG, "Error while retrieving device ID");
 711         return OC_STACK_ERROR;
 712     }
 713
 714     OicSecDpairing_t dpair;
 715     memset(&dpair, 0, sizeof(OicSecDpairing_t));
 716     dpair.spm = pmSel;
 717     memcpy(&dpair.pdeviceID, &deviceID, sizeof(OicUuid_t));
 718
 719     OCSecurityPayload* secPayload = (OCSecurityPayload*)OICCalloc(1, sizeof(OCSecurityPayload));
 720     if(!secPayload)
 721     {
 722         OIC_LOG(ERROR, TAG, "Failed to memory allocation");
 723         return OC_STACK_NO_MEMORY;
 724     }
 725     secPayload->base.type = PAYLOAD_TYPE_SECURITY;
 726
 727     OCStackResult ret = DpairingToCBORPayload(&dpair, &(secPayload->securityData),
 728             &(secPayload->payloadSize));
 729
 730     if(OC_STACK_OK != ret)
 731     {
 732         OICFree(secPayload);
 733         OIC_LOG(ERROR, TAG, "Failed to DpairingToCBORPayload");
 734         return OC_STACK_NO_MEMORY;
 735     }
 736     OIC_LOG(DEBUG, TAG, "DPARING CBOR data:");
 737     OIC_LOG_BUFFER(DEBUG, TAG, secPayload->securityData, secPayload->payloadSize);
 738
 739     char query[MAX_URI_LENGTH + MAX_QUERY_LENGTH] = {0};
 740     if(!DPGenerateQuery(false,
 741                         peer->endpoint.addr,
 742                         peer->endpoint.port,
 743                         //peer->securePort,
 744                         peer->connType,
 745                         query, sizeof(query), OIC_RSRC_DPAIRING_URI))
 746     {
 747         OIC_LOG(ERROR, TAG, "DPDirectPairing : Failed to generate query");
 748         return OC_STACK_ERROR;
 749     }
 750     OIC_LOG_V(DEBUG, TAG, "Query=%s", query);
 751
 752     DPairData_t *dpairData = (DPairData_t *) OICCalloc(1, sizeof(DPairData_t));
 753     if (dpairData == NULL)
 754     {
 755         OICFree(secPayload->securityData);
 756         OICFree(secPayload);
 757         OIC_LOG(ERROR, TAG, "Unable to allocate memory");
 758         return OC_STACK_NO_MEMORY;
 759     }
 760     dpairData->peer = peer;
 761     memcpy(dpairData->pin, pinNumber, DP_PIN_LENGTH);
 762     dpairData->resultCallback = resultCallback;
 763     dpairData->userCtx = ctx;
 764
 765     OCCallbackData cbData =  {.context=NULL, .cb=NULL, .cd=NULL};
 766     cbData.cb = DirectPairingHandler;
 767     cbData.context = (void*)dpairData;
 768     cbData.cd = NULL;
 769
 770     OCMethod method = OC_REST_POST;
 771     OCDoHandle handle = NULL;
 772     OIC_LOG(DEBUG, TAG, "Sending DPAIRNG setting to resource server");
 773     ret = OCDoResource(&handle, method, query,
 774             &peer->endpoint, (OCPayload*)secPayload,
 775             peer->connType, OC_LOW_QOS, &cbData, NULL, 0);
 776     if(OC_STACK_OK != ret)
 777     {
 778         OIC_LOG(ERROR, TAG, "error in OCDoResource");
 779         return OC_STACK_ERROR;
 780     }
 781
 782     return OC_STACK_OK;
 783
 784  }
 785
 786 /**
 787  * Callback handler for getting secure port information using /oic/res discovery.
 788  *
 789  * @param[in] ctx             user context
 790  * @param[in] handle          Handle for response
 791  * @param[in] clientResponse  Response information(It will contain payload)
 792  *
 793  * @return OC_STACK_KEEP_TRANSACTION to keep transaction and
 794  *         OC_STACK_DELETE_TRANSACTION to delete it.
 795  */
 796 static OCStackApplicationResult DirectPairingPortDiscoveryHandler(void *ctx, OCDoHandle UNUSED,
 797                                  OCClientResponse *clientResponse)
 798 {
 799     OIC_LOG(INFO, TAG, "Callback Context for Direct-Pairing Secure Port DISCOVER "
 800             "query recvd successfully");
 801
 802     (void)ctx;
 803     (void)UNUSED;
 804     if (clientResponse)
 805     {
 806         if  (NULL == clientResponse->payload)
 807         {
 808             OIC_LOG(INFO, TAG, "Skiping Null payload");
 809         }
 810         else
 811         {
 812             if (PAYLOAD_TYPE_DISCOVERY != clientResponse->payload->type)
 813             {
 814                 OIC_LOG(INFO, TAG, "Wrong payload type");
 815                 return OC_STACK_DELETE_TRANSACTION;
 816             }
 817
 818             uint16_t securePort = 0;
 819             OCResourcePayload* resPayload = ((OCDiscoveryPayload*)clientResponse->payload)->resources;
 820             OIC_LOG_PAYLOAD(INFO, clientResponse->payload);
 821
 822             if (resPayload && resPayload->secure)
 823             {
 824                 securePort = resPayload->port;
 825             }
 826             else
 827             {
 828                 OIC_LOG(INFO, TAG, "Can not find secure port information.");
 829                 return OC_STACK_DELETE_TRANSACTION;
 830             }
 831
 832             OCDirectPairingDev_t *ptr = getDev(&g_dp_discover,
 833                     clientResponse->devAddr.addr, clientResponse->devAddr.port);
 834             if(!ptr)
 835             {
 836                 OIC_LOG(ERROR, TAG, "Can not find device information in the discovery device list");
 837                 return OC_STACK_DELETE_TRANSACTION;
 838             }
 839             ptr->securePort = securePort;
 840
 841             OIC_LOG(INFO, TAG, "Exiting DirectPairingPortDiscoveryHandler.");
 842         }
 843
 844         return  OC_STACK_DELETE_TRANSACTION;
 845     }
 846     else
 847     {
 848         OIC_LOG(INFO, TAG, "Skiping Null response");
 849     }
 850     return  OC_STACK_DELETE_TRANSACTION;
 851 }
 852
 853 /**
 854  * Callback handler for DPDeviceDiscovery API.
 855  *
 856  * @param[in] ctx             User context
 857  * @param[in] handle          Handler for response
 858  * @param[in] clientResponse  Response information (It will contain payload)
 859  * @return OC_STACK_KEEP_TRANSACTION to keep transaction and
 860  *         OC_STACK_DELETE_TRANSACTION to delete it.
 861  */
 862 static OCStackApplicationResult DirectPairingDiscoveryHandler(void* ctx, OCDoHandle UNUSED,
 863         OCClientResponse * clientResponse)
 864 {
 865     OIC_LOG(INFO, TAG, "Callback Context for Direct-Pairing DISCOVER query recvd successfully");
 866
 867     (void)ctx;
 868     (void)UNUSED;
 869     if (clientResponse)
 870     {
 871         OIC_LOG_V(INFO, TAG, "StackResult: %d", clientResponse->result);
 872         OIC_LOG_V(INFO, TAG,
 873                 "Device =============> Discovered @ %s:%d",
 874                 clientResponse->devAddr.addr,
 875                 clientResponse->devAddr.port);
 876
 877         if  (NULL == clientResponse->payload)
 878         {
 879             OIC_LOG(INFO, TAG, "Skiping Null payload");
 880             return OC_STACK_KEEP_TRANSACTION;
 881         }
 882         if (OC_STACK_OK != clientResponse->result)
 883         {
 884             OIC_LOG(INFO, TAG, "Error in response");
 885             return OC_STACK_KEEP_TRANSACTION;
 886         }
 887
 888         OIC_LOG_PAYLOAD(INFO, clientResponse->payload);
 889         OicSecPconf_t *pconf = NULL;
 890
 891         OCStackResult res = CBORPayloadToPconf(
 892                 ((OCSecurityPayload*)clientResponse->payload)->securityData,
 893                 CBOR_SIZE,&pconf);
 894         if (OC_STACK_OK != res )
 895         {
 896             OIC_LOG(INFO, TAG, "Ignoring malformed CBOR");
 897             return OC_STACK_KEEP_TRANSACTION;
 898         }
 899         else
 900         {
 901             if(pconf->edp)
 902             {
 903                 OCDevAddr endpoint;
 904                 memcpy(&endpoint, &clientResponse->devAddr, sizeof(OCDevAddr));
 905
 906                 OCStackResult res = addDev(&g_dp_discover, &endpoint,
 907                             clientResponse->connType, pconf);
 908                 DeletePconfBinData(pconf);
 909                 if (OC_STACK_OK != res)
 910                 {
 911                     OIC_LOG(ERROR, TAG, "Error while adding data to linkedlist.");
 912                     return OC_STACK_KEEP_TRANSACTION;
 913                 }
 914
 915
 916                 char rsrc_uri[MAX_URI_LENGTH+1] = {0};
 917                 int wr_len = snprintf(rsrc_uri, sizeof(rsrc_uri), "%s?%s=%s",
 918                           OC_RSRVD_WELL_KNOWN_URI, OC_RSRVD_RESOURCE_TYPE, OIC_RSRC_TYPE_SEC_DPAIRING);
 919                 if(wr_len <= 0 || (size_t)wr_len >= sizeof(rsrc_uri))
 920                 {
 921                     OIC_LOG(ERROR, TAG, "rsrc_uri_string_print failed");
 922                     return OC_STACK_KEEP_TRANSACTION;
 923                 }
 924
 925                 //Try to the unicast discovery to getting secure port
 926                 char query[MAX_URI_LENGTH+MAX_QUERY_LENGTH+1] = {0};
 927                 if(!DPGenerateQuery(false,
 928                                     clientResponse->devAddr.addr, clientResponse->devAddr.port,
 929                                     clientResponse->connType,
 930                                     query, sizeof(query), rsrc_uri))
 931                 {
 932                     OIC_LOG(ERROR, TAG, "DirectPairingDiscoveryHandler : Failed to generate query");
 933                     return OC_STACK_KEEP_TRANSACTION;
 934                 }
 935                 OIC_LOG_V(DEBUG, TAG, "Query=%s", query);
 936
 937                 OCCallbackData cbData;
 938                 cbData.cb = &DirectPairingPortDiscoveryHandler;
 939                 cbData.context = NULL;
 940                 cbData.cd = NULL;
 941                 OCStackResult ret = OCDoResource(NULL, OC_REST_DISCOVER, query, 0, 0,
 942                         clientResponse->connType, OC_LOW_QOS, &cbData, NULL, 0);
 943                 if(OC_STACK_OK != ret)
 944                 {
 945                     OIC_LOG(ERROR, TAG, "Failed to Secure Port Discovery");
 946                     return OC_STACK_KEEP_TRANSACTION;
 947                 }
 948                 else
 949                 {
 950                     OIC_LOG_V(INFO, TAG, "OCDoResource with [%s] Success", query);
 951                 }
 952             }
 953             return  OC_STACK_KEEP_TRANSACTION;
 954         }
 955     }
 956     else
 957     {
 958         OIC_LOG(INFO, TAG, "Skiping Null response");
 959     }
 960
 961     return OC_STACK_DELETE_TRANSACTION;
 962 }
 963 #ifndef WITH_ARDUINO
 964 /**
 965  * Discover direct-pairing devices in the same IP subnet. .
 966  *
 967  * @param[in] waittime  Timeout in seconds.
 968  *
 969  * @return OC_STACK_OK on success otherwise error.
 970  */
 971 OCStackResult DPDeviceDiscovery(unsigned short waittime)
 972 {
 973     OIC_LOG(DEBUG, TAG, "IN DPDeviceDiscovery");
 974
 975     if (g_dp_discover)
 976     {
 977         delList(g_dp_discover);
 978         g_dp_discover = NULL;
 979     }
 980
 981     OCStackResult ret;
 982
 983     const char DP_DISCOVERY_QUERY[] = "/oic/sec/pconf";
 984
 985     OCCallbackData cbData;
 986     cbData.cb = DirectPairingDiscoveryHandler;
 987     cbData.context = NULL;
 988     cbData.cd = NULL;
 989
 990     /* Start a DP discovery query*/
 991     OIC_LOG_V(INFO, TAG, "Initiating Direct-Pairing Discovery : %s\n", DP_DISCOVERY_QUERY);
 992     OCDoHandle handle = NULL;
 993     ret = OCDoResource(&handle, OC_REST_DISCOVER, DP_DISCOVERY_QUERY, 0, 0, CT_DEFAULT,
 994                        OC_LOW_QOS, &cbData, NULL, 0);
 995     if (ret != OC_STACK_OK)
 996     {
 997         OIC_LOG(ERROR, TAG, "OCStack resource error");
 998         return ret;
 999     }
1000
1001     // wait..
1002
1003     int clock_res = -1;
1004 #if defined(_MSC_VER)
1005     time_t startTime = NULL;
1006     clock_res = (time(&startTime) == -1);
1007 #else
1008     struct timespec startTime = {.tv_sec=0, .tv_nsec=0};
1009 #if defined(__ANDROID__) || _POSIX_TIMERS > 0
1010     clock_res = clock_gettime(CLOCK_MONOTONIC, &startTime);
1011 #endif
1012 #endif
1013     if (0 != clock_res)
1014     {
1015         OIC_LOG(ERROR, TAG, "clock error");
1016         if(OC_STACK_OK !=  OCCancel(handle, OC_LOW_QOS, NULL, 0))
1017         {
1018             OIC_LOG(ERROR, TAG, "Failed to remove registered callback");
1019         }
1020         return OC_STACK_ERROR;
1021     }
1022
1023     while (1)
1024     {
1025 #if defined(_MSC_VER)
1026         time_t currTime = NULL;
1027         clock_res = (time(&currTime) == -1);
1028 #else
1029         struct timespec currTime  = {.tv_sec=0, .tv_nsec=0};
1030 #if defined(__ANDROID__) || _POSIX_TIMERS > 0
1031         clock_res = clock_gettime(CLOCK_MONOTONIC, &currTime);
1032 #endif
1033 #endif
1034         if (0 != clock_res)
1035         {
1036             OIC_LOG(ERROR, TAG, "clock error");
1037             ret = OC_STACK_ERROR;
1038             break;
1039         }
1040 #if defined(_MSC_VER)
1041         long elapsed = currTime - startTime;
1042 #else
1043         long elapsed = (currTime.tv_sec - startTime.tv_sec);
1044 #endif
1045         if (elapsed > waittime)
1046         {
1047             break;
1048         }
1049         else
1050         {
1051             struct timespec timeout = {.tv_sec=0, .tv_nsec=100000000L};
1052             OCProcess();
1053             nanosleep(&timeout, NULL);
1054         }
1055     }
1056
1057     // Waiting for each response.
1058     ret = OCCancel(handle, OC_LOW_QOS, NULL, 0);
1059     if (OC_STACK_OK != ret)
1060     {
1061         OIC_LOG(ERROR, TAG, "Failed to remove registered callback");
1062     }
1063     OIC_LOG(DEBUG, TAG, "OUT DPDeviceDiscovery");
1064     return ret;
1065 }
1066 #endif