resource/csdk/security/src/directpairing.c

   1 /* *****************************************************************\r
   2  *\r
   3  * Copyright 2016 Samsung Electronics All Rights Reserved.\r
   4  *\r
   5  *\r
   6  *\r
   7  * Licensed under the Apache License, Version 2.0 (the "License");\r
   8  * you may not use this file except in compliance with the License.\r
   9  * You may obtain a copy of the License at\r
  10  *\r
  11  *     http://www.apache.org/licenses/LICENSE-2.0\r
  12  *\r
  13  * Unless required by applicable law or agreed to in writing, software\r
  14  * distributed under the License is distributed on an "AS IS" BASIS,\r
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
  16  * See the License for the specific language governing permissions and\r
  17  * limitations under the License.\r
  18  *\r
  19  * *****************************************************************/\r
  20 #ifndef _POSIX_C_SOURCE\r
  21 #define _POSIX_C_SOURCE 200112L\r
  22 #endif\r
  23 \r
  24 #ifndef WITH_ARDUINO\r
  25 #include <unistd.h>\r
  26 #include <string.h>\r
  27 #include <time.h>\r
  28 #include <sys/time.h>\r
  29 #endif\r
  30 #include <string.h>\r
  31 \r
  32 #include "ocstack.h"\r
  33 #include "oic_malloc.h"\r
  34 #include "oic_string.h"\r
  35 #include "logger.h"\r
  36 #include "cJSON.h"\r
  37 #include "utlist.h"\r
  38 #include "ocpayload.h"\r
  39 #include "payload_logging.h"\r
  40 #include "cainterface.h"\r
  41 \r
  42 #include "directpairing.h"\r
  43 #include "srmresourcestrings.h" //@note: SRM's internal header\r
  44 #include "doxmresource.h"       //@note: SRM's internal header\r
  45 #include "pconfresource.h"       //@note: SRM's internal header\r
  46 #include "dpairingresource.h"       //@note: SRM's internal header\r
  47 #include "credresource.h"\r
  48 \r
  49 #include "pmtypes.h"\r
  50 #include "pmutility.h"\r
  51 \r
  52 #include "srmutility.h"\r
  53 \r
  54 #ifdef __WITH_DTLS__\r
  55 #include "global.h"\r
  56 #endif\r
  57 \r
  58 \r
  59 #define TAG ("DP")\r
  60 \r
  61 /**\r
  62  * Structure to carry direct-pairing API data to callback.\r
  63  */\r
  64 typedef struct DPairData\r
  65 {\r
  66     OCDirectPairingDev_t        *peer;                         /**< Pointer to pairing target info.**/\r
  67     char                                  pin[DP_PIN_LENGTH];  /**< PIN **/\r
  68     OCDirectPairingResultCB    resultCallback;           /**< Pointer to result callback.**/\r
  69 } DPairData_t;\r
  70 \r
  71 static OCDirectPairingDev_t *g_dp_paired = NULL;\r
  72 static OCDirectPairingDev_t *g_dp_discover = NULL;\r
  73 static DPairData_t *g_dp_proceed_ctx = NULL;\r
  74 \r
  75 /**\r
  76  * Function to search node in linked list that matches given IP and port.\r
  77  *\r
  78  * @param[in] pList         List of OCProvisionDev_t.\r
  79  * @param[in] addr          address of target device.\r
  80  * @param[in] port          port of remote server.\r
  81  *\r
  82  * @return pointer of OCProvisionDev_t if exist, otherwise NULL\r
  83  */\r
  84 OCDirectPairingDev_t* getDev(OCDirectPairingDev_t **ppList, const char* addr, const uint16_t port)\r
  85 {\r
  86     if(NULL == addr)\r
  87     {\r
  88         OIC_LOG_V(ERROR, TAG, "Invalid Input parameters in [%s]\n", __FUNCTION__);\r
  89         return NULL;\r
  90     }\r
  91 \r
  92     OCDirectPairingDev_t *ptr = NULL;\r
  93     LL_FOREACH(*ppList, ptr)\r
  94     {\r
  95         if( strcmp(ptr->endpoint.addr, addr) == 0 && port == ptr->endpoint.port)\r
  96         {\r
  97             return ptr;\r
  98         }\r
  99     }\r
 100 \r
 101     return NULL;\r
 102 }\r
 103 \r
 104 \r
 105 \r
 106 /**\r
 107  * Add device information to list.\r
 108  *\r
 109  * @param[in] pList         List of OCProvisionDev_t.\r
 110  * @param[in] addr          address of target device.\r
 111  * @param[in] port          port of remote server.\r
 112  * @param[in] adapter       adapter type of endpoint.\r
 113  * @param[in] doxm          pointer to doxm instance.\r
 114  * @param[in] connType  connectivity type of endpoint\r
 115  *\r
 116  * @return OC_STACK_OK for success and errorcode otherwise.\r
 117  */\r
 118 OCStackResult addDev(OCDirectPairingDev_t **ppList, OCDevAddr *endpoint,\r
 119                                       OCConnectivityType conn, OicSecPconf_t *pconf)\r
 120 {\r
 121     if(NULL == endpoint || NULL == pconf)\r
 122     {\r
 123         OIC_LOG_V(ERROR, TAG, "Invalid Input parameters in [%s]\n", __FUNCTION__);\r
 124         return OC_STACK_INVALID_PARAM;\r
 125     }\r
 126 \r
 127     OCDirectPairingDev_t *ptr = getDev(ppList, endpoint->addr, endpoint->port);\r
 128     if(!ptr)\r
 129     {\r
 130         ptr = (OCDirectPairingDev_t *)OICCalloc(1, sizeof (OCDirectPairingDev_t));\r
 131         if (NULL == ptr)\r
 132         {\r
 133             OIC_LOG(ERROR, TAG, "Error while allocating memory for linkedlist node !!");\r
 134             return OC_STACK_NO_MEMORY;\r
 135         }\r
 136 \r
 137         memcpy(&ptr->endpoint, endpoint, sizeof(OCDevAddr));\r
 138         ptr->connType = conn;\r
 139         ptr->securePort = DEFAULT_SECURE_PORT;\r
 140         ptr->edp = pconf->edp;\r
 141         ptr->prm = pconf->prm;\r
 142         pconf->prm = NULL;  // to prevent free\r
 143         ptr->prmLen = pconf->prmLen;\r
 144         memcpy(&ptr->deviceID, &pconf->deviceID, sizeof(OicUuid_t));\r
 145         memcpy(&ptr->rowner, &pconf->rowner, sizeof(OicUuid_t));\r
 146         ptr->next = NULL;\r
 147 \r
 148         LL_PREPEND(*ppList, ptr);\r
 149         OIC_LOG(INFO, TAG, "device added !");\r
 150     }\r
 151 \r
 152     return OC_STACK_OK;\r
 153 }\r
 154 \r
 155 \r
 156 /**\r
 157  * Add device information to list.\r
 158  *\r
 159  * @param[in] ppList         List of OCProvisionDev_t.\r
 160  * @param[in] pDev          target device.\r
 161  *\r
 162  * @return OC_STACK_OK for success and errorcode otherwise.\r
 163  */\r
 164 OCStackResult addDev2(OCDirectPairingDev_t **ppList, OCDirectPairingDev_t *pDev)\r
 165 {\r
 166     if(NULL == pDev)\r
 167     {\r
 168         OIC_LOG_V(ERROR, TAG, "Invalid Input parameters in [%s]\n", __FUNCTION__);\r
 169         return OC_STACK_INVALID_PARAM;\r
 170     }\r
 171 \r
 172     OCDirectPairingDev_t *ptr = getDev(ppList, pDev->endpoint.addr, pDev->endpoint.port);\r
 173     if(!ptr)\r
 174     {\r
 175         ptr = (OCDirectPairingDev_t *)OICCalloc(1, sizeof (OCDirectPairingDev_t));\r
 176         if (NULL == ptr)\r
 177         {\r
 178             OIC_LOG(ERROR, TAG, "Error while allocating memory for linkedlist node !!");\r
 179             return OC_STACK_NO_MEMORY;\r
 180         }\r
 181 \r
 182         memcpy(&ptr->endpoint, &pDev->endpoint, sizeof(OCDevAddr));\r
 183         ptr->connType = pDev->connType;\r
 184         ptr->securePort = pDev->securePort;\r
 185         ptr->edp = pDev->edp;\r
 186         ptr->prmLen = pDev->prmLen;\r
 187         ptr->prm = (OicSecPrm_t*)OICCalloc(ptr->prmLen, sizeof (OicSecPrm_t));\r
 188         if (NULL == ptr->prm)\r
 189         {\r
 190             OIC_LOG(ERROR, TAG, "Error while allocating memory for prm !!");\r
 191             return OC_STACK_NO_MEMORY;\r
 192         }\r
 193         memcpy(ptr->prm, pDev->prm, sizeof(OicSecPrm_t)*ptr->prmLen);\r
 194         memcpy(&ptr->deviceID, &pDev->deviceID, sizeof(OicUuid_t));\r
 195         memcpy(&ptr->rowner, &pDev->rowner, sizeof(OicUuid_t));\r
 196         ptr->next = NULL;\r
 197 \r
 198         LL_PREPEND(*ppList, ptr);\r
 199         OIC_LOG(INFO, TAG, "device added !");\r
 200     }\r
 201 \r
 202     return OC_STACK_OK;\r
 203 }\r
 204 \r
 205 \r
 206 \r
 207 /**\r
 208  * This function deletes list of provision target devices\r
 209  *\r
 210  * @param[in] pDevicesList         List of OCProvisionDev_t.\r
 211  */\r
 212 void delList(OCDirectPairingDev_t *pList)\r
 213 {\r
 214     if(pList)\r
 215     {\r
 216         OCDirectPairingDev_t *del = NULL, *tmp = NULL;\r
 217         LL_FOREACH_SAFE(pList, del, tmp)\r
 218         {\r
 219             LL_DELETE(pList, del);\r
 220             if (del && del->prm)\r
 221             {\r
 222                 OICFree(del->prm);\r
 223             }\r
 224         }\r
 225     }\r
 226 }\r
 227 \r
 228 bool DPGenerateQuery(bool isSecure,\r
 229                      const char* address, const uint16_t port,\r
 230                      const OCConnectivityType connType,\r
 231                      char* buffer, size_t bufferSize, const char* uri)\r
 232 {\r
 233     if(!address || !buffer || !uri)\r
 234     {\r
 235         OIC_LOG(ERROR, TAG, "DPGenerateQuery : Invalid parameters.");\r
 236         return false;\r
 237     }\r
 238 \r
 239     static char QPREFIX_COAP[] =  "coap://";\r
 240     static char QPREFIX_COAPS[] = "coaps://";\r
 241 \r
 242     int snRet = 0;\r
 243     char* prefix = (isSecure == true) ? QPREFIX_COAPS : QPREFIX_COAP;\r
 244 \r
 245     switch(connType & CT_MASK_ADAPTER)\r
 246     {\r
 247         case CT_ADAPTER_IP:\r
 248             switch(connType & CT_MASK_FLAGS & ~CT_FLAG_SECURE)\r
 249             {\r
 250                 case CT_IP_USE_V4:\r
 251                         snRet = snprintf(buffer, bufferSize, "%s%s:%d%s",\r
 252                                          prefix, address, port, uri);\r
 253                     break;\r
 254                 case CT_IP_USE_V6:\r
 255                         snRet = snprintf(buffer, bufferSize, "%s[%s]:%d%s",\r
 256                                          prefix, address, port, uri);\r
 257                     break;\r
 258                 default:\r
 259                     OIC_LOG(ERROR, TAG, "Unknown address format.");\r
 260                     return false;\r
 261             }\r
 262             // snprintf return value check\r
 263             if (snRet < 0)\r
 264             {\r
 265                 OIC_LOG_V(ERROR, TAG, "DPGenerateQuery : Error (snprintf) %d\n", snRet);\r
 266                 return false;\r
 267             }\r
 268             else if ((size_t)snRet >= bufferSize)\r
 269             {\r
 270                 OIC_LOG_V(ERROR, TAG, "DPGenerateQuery : Truncated (snprintf) %d\n", snRet);\r
 271                 return false;\r
 272             }\r
 273 \r
 274             break;\r
 275 #ifndef WITH_ARDUINO\r
 276         // TODO: We need to verify tinyDTLS in below cases\r
 277         case CT_ADAPTER_GATT_BTLE:\r
 278         case CT_ADAPTER_RFCOMM_BTEDR:\r
 279             OIC_LOG(ERROR, TAG, "Not supported connectivity adapter.");\r
 280             return false;\r
 281             break;\r
 282 #endif\r
 283         default:\r
 284             OIC_LOG(ERROR, TAG, "Unknown connectivity adapter.");\r
 285             return false;\r
 286     }\r
 287 \r
 288     return true;\r
 289 }\r
 290 \r
 291 const OCDirectPairingDev_t* DPGetDiscoveredDevices()\r
 292 {\r
 293     return g_dp_discover;\r
 294 }\r
 295 \r
 296 const OCDirectPairingDev_t* DPGetPairedDevices()\r
 297 {\r
 298     return g_dp_paired;\r
 299 }\r
 300 \r
 301 void DPDeleteLists()\r
 302 {\r
 303     delList(g_dp_discover);\r
 304     delList(g_dp_paired);\r
 305 }\r
 306 \r
 307 /**\r
 308  * Callback handler of FinalizeDirectPairing.\r
 309  *\r
 310  * @param[in] ctx             ctx value passed to callback from calling function.\r
 311  * @param[in] UNUSED          handle to an invocation\r
 312  * @param[in] clientResponse  Response from queries to remote servers.\r
 313  * @return  OC_STACK_DELETE_TRANSACTION to delete the transaction\r
 314  *          and  OC_STACK_KEEP_TRANSACTION to keep it.\r
 315  */\r
 316 static OCStackApplicationResult DirectPairingFinalizeHandler(void *ctx, OCDoHandle UNUSED,\r
 317                                                   OCClientResponse *clientResponse)\r
 318 {\r
 319     OIC_LOG_V(INFO, TAG, "IN DirectPairingFinalizeHandler()");\r
 320     (void)UNUSED;\r
 321     if(NULL == ctx)\r
 322     {\r
 323         OIC_LOG(ERROR, TAG, "Context is Null");\r
 324         return OC_STACK_DELETE_TRANSACTION;\r
 325     }\r
 326 \r
 327     OCStackResult res;\r
 328     DPairData_t *dpairData = (DPairData_t*)ctx;\r
 329     OCDirectPairingDev_t *peer = dpairData->peer;\r
 330     OCDirectPairingResultCB resultCallback = dpairData->resultCallback;\r
 331 \r
 332     if (clientResponse)\r
 333     {\r
 334         if(OC_STACK_OK == clientResponse->result)\r
 335         {\r
 336             // result\r
 337             OIC_LOG(INFO, TAG, "DirectPairingFinalizeHandler : success PUT request to /oic/sec/dpairing");\r
 338 \r
 339             CAEndpoint_t endpoint;\r
 340             memset(&endpoint, 0x00, sizeof(CAEndpoint_t));\r
 341             OICStrcpy(endpoint.addr, MAX_ADDR_STR_SIZE_CA, peer->endpoint.addr);\r
 342             endpoint.addr[MAX_ADDR_STR_SIZE_CA - 1] = '\0';\r
 343             endpoint.port = peer->securePort;\r
 344 \r
 345             OicUuid_t ptDeviceID = {.id={0}};\r
 346             if (OC_STACK_OK != GetDoxmDeviceID(&ptDeviceID))\r
 347             {\r
 348                 OIC_LOG(ERROR, TAG, "Error while retrieving provisioning tool's device ID");\r
 349                 resultCallback(peer, OC_STACK_ERROR);\r
 350                 return OC_STACK_DELETE_TRANSACTION;\r
 351             }\r
 352 \r
 353 #ifdef __WITH_DTLS__\r
 354             res = SavePairingPSK((OCDevAddr*)&endpoint, &peer->deviceID, &ptDeviceID, false);\r
 355             if(OC_STACK_OK != res)\r
 356             {\r
 357                 OIC_LOG(ERROR, TAG, "Failed to PairingPSK generation");\r
 358                 resultCallback(peer, res);\r
 359                 return OC_STACK_DELETE_TRANSACTION;\r
 360             }\r
 361 \r
 362             //  close temporary sesion\r
 363             CAResult_t caResult = CACloseDtlsSession((const CAEndpoint_t*)&endpoint);\r
 364             if(CA_STATUS_OK != caResult)\r
 365             {\r
 366                 OIC_LOG(INFO, TAG, "Fail to close temporary dtls session");\r
 367             }\r
 368 \r
 369             caResult = CASelectCipherSuite(TLS_NULL_WITH_NULL_NULL);\r
 370             if(CA_STATUS_OK != caResult)\r
 371             {\r
 372                 OIC_LOG(ERROR, TAG, "Failed to select TLS_NULL_WITH_NULL_NULL");\r
 373             }\r
 374 #endif // __WITH_DTLS__\r
 375 \r
 376             OIC_LOG(INFO, TAG, "Direct-Papring was successfully completed.");\r
 377 \r
 378             // update paired list\r
 379             OCDirectPairingDev_t *dev = getDev(&g_dp_discover, peer->endpoint.addr, peer->endpoint.port);\r
 380             res = addDev2(&g_dp_paired, dev);\r
 381             if (OC_STACK_OK != res)\r
 382             {\r
 383                 OIC_LOG(ERROR, TAG, "Error while adding a device to paired list.");\r
 384             }\r
 385 \r
 386             resultCallback(peer, OC_STACK_OK);\r
 387 \r
 388             return OC_STACK_DELETE_TRANSACTION;\r
 389         }\r
 390         else\r
 391         {\r
 392             OIC_LOG(INFO, TAG, "Direct-Papring received error response.");\r
 393         }\r
 394     }\r
 395     else\r
 396     {\r
 397         OIC_LOG(ERROR, TAG, "DirectPairingFinalizeHandler received Null clientResponse");\r
 398     }\r
 399 \r
 400     resultCallback(peer, OC_STACK_ERROR);\r
 401     OICFree(dpairData);\r
 402     return OC_STACK_DELETE_TRANSACTION;\r
 403 }\r
 404 \r
 405 /**\r
 406  * Finalize direct-pairing .\r
 407  *\r
 408  * @param[in] peer  target device to establish direct-pairing.\r
 409  * @param[in] resultCallback  result event callback.\r
 410  *\r
 411  * @return OC_STACK_OK on success otherwise error.\r
 412  */\r
 413 OCStackResult FinalizeDirectPairing(OCDirectPairingDev_t* peer,\r
 414                                                      OCDirectPairingResultCB resultCallback)\r
 415 {\r
 416     if(NULL == peer)\r
 417     {\r
 418         return OC_STACK_INVALID_PARAM;\r
 419     }\r
 420 \r
 421     OicUuid_t deviceID =   {.id={0}};\r
 422     if (OC_STACK_OK != GetDoxmDeviceID(&deviceID))\r
 423     {\r
 424         OIC_LOG(ERROR, TAG, "Error while retrieving device ID");\r
 425         return OC_STACK_ERROR;\r
 426     }\r
 427 \r
 428     OicSecDpairing_t dpair;\r
 429     memset(&dpair, 0, sizeof(OicSecDpairing_t));\r
 430     dpair.spm = (OicSecPrm_t)PRM_NOT_ALLOWED;\r
 431     memcpy(&dpair.pdeviceID, &deviceID, sizeof(OicUuid_t));\r
 432 \r
 433     OCSecurityPayload* secPayload = (OCSecurityPayload*)OICCalloc(1, sizeof(OCSecurityPayload));\r
 434     if(!secPayload)\r
 435     {\r
 436         OIC_LOG(ERROR, TAG, "Failed to memory allocation");\r
 437         return OC_STACK_NO_MEMORY;\r
 438     }\r
 439     secPayload->base.type = PAYLOAD_TYPE_SECURITY;\r
 440     secPayload->securityData = BinToDpairingJSON(&dpair);\r
 441     if(NULL == secPayload->securityData)\r
 442     {\r
 443         OICFree(secPayload);\r
 444         OIC_LOG(ERROR, TAG, "Failed to BinToDpairingJSON");\r
 445         return OC_STACK_NO_MEMORY;\r
 446     }\r
 447     OIC_LOG_V(INFO, TAG, "DPARING : %s", secPayload->securityData);\r
 448 \r
 449     char query[MAX_URI_LENGTH + MAX_QUERY_LENGTH] = {0};\r
 450     if(!DPGenerateQuery(true,\r
 451                         peer->endpoint.addr,\r
 452                         peer->securePort,\r
 453                         peer->connType,\r
 454                         query, sizeof(query), OIC_RSRC_DPAIRING_URI))\r
 455     {\r
 456         OIC_LOG(ERROR, TAG, "DPDirectPairing : Failed to generate query");\r
 457         return OC_STACK_ERROR;\r
 458     }\r
 459     OIC_LOG_V(DEBUG, TAG, "Query=%s", query);\r
 460 \r
 461     DPairData_t *dpairData = (DPairData_t *) OICCalloc(1, sizeof(DPairData_t));\r
 462     if (dpairData == NULL)\r
 463     {\r
 464         OICFree(secPayload->securityData);\r
 465         OICFree(secPayload);\r
 466         OIC_LOG(ERROR, TAG, "Unable to allocate memory");\r
 467         return OC_STACK_NO_MEMORY;\r
 468     }\r
 469     dpairData->peer = peer;\r
 470     dpairData->resultCallback = resultCallback;\r
 471 \r
 472     OCCallbackData cbData =  {.context=NULL, .cb=NULL, .cd=NULL};\r
 473     cbData.cb = DirectPairingFinalizeHandler;\r
 474     cbData.context = (void*)dpairData;\r
 475     cbData.cd = NULL;\r
 476 \r
 477     OCMethod method = OC_REST_PUT;\r
 478     OCDoHandle handle = NULL;\r
 479     OIC_LOG(DEBUG, TAG, "Sending DPAIRNG setting to resource server");\r
 480     OCStackResult ret = OCDoResource(&handle, method, query,\r
 481             &peer->endpoint, (OCPayload*)secPayload,\r
 482             peer->connType, OC_LOW_QOS, &cbData, NULL, 0);\r
 483     if(OC_STACK_OK != ret)\r
 484     {\r
 485         OIC_LOG(ERROR, TAG, "error in OCDoResource");\r
 486         return OC_STACK_ERROR;\r
 487     }\r
 488 \r
 489     return OC_STACK_OK;\r
 490  }\r
 491 \r
 492 /**\r
 493  * Function to handle the handshake result in Direct-Pairing.\r
 494  * This function will be invoked after DTLS handshake\r
 495  * @param   endPoint  [IN] The remote endpoint.\r
 496  * @param   errorInfo [IN] Error information from the endpoint.\r
 497  * @return  NONE\r
 498  */\r
 499 void DirectPairingDTLSHandshakeCB(const CAEndpoint_t *endpoint, const CAErrorInfo_t *info)\r
 500 {\r
 501     OIC_LOG_V(INFO, TAG, "IN DirectPairingDTLSHandshakeCB");\r
 502 \r
 503 \r
 504     if(g_dp_proceed_ctx && g_dp_proceed_ctx->peer && endpoint && info)\r
 505     {\r
 506         OIC_LOG_V(INFO, TAG, "Received status from remote device(%s:%d) : %d",\r
 507                  endpoint->addr, endpoint->port, info->result);\r
 508 \r
 509         OCDirectPairingDev_t *peer = g_dp_proceed_ctx->peer;\r
 510         OCDirectPairingResultCB resultCallback = g_dp_proceed_ctx->resultCallback;\r
 511         OCStackResult res;\r
 512 \r
 513         //Make sure the address matches.\r
 514         if(strncmp(peer->endpoint.addr, endpoint->addr, sizeof(endpoint->addr)) == 0 &&\r
 515                          peer->securePort == endpoint->port)\r
 516         {\r
 517             //In case of success, send next coaps request.\r
 518             if(CA_STATUS_OK == info->result)\r
 519             {\r
 520                 OIC_LOG(INFO, TAG, "Now, finalize Direct-Pairing procedure.");\r
 521 \r
 522                 res = FinalizeDirectPairing(peer, resultCallback);\r
 523                 if(OC_STACK_OK != res)\r
 524                 {\r
 525                     OIC_LOG(ERROR, TAG, "Failed to finalize direct-pairing");\r
 526                     resultCallback(peer, res);\r
 527                 }\r
 528             }\r
 529             else if(CA_DTLS_AUTHENTICATION_FAILURE == info->result)\r
 530             {\r
 531                 OIC_LOG(INFO, TAG, "DirectPairingDTLSHandshakeCB - Authentication failed");\r
 532                 resultCallback(peer, OC_STACK_AUTHENTICATION_FAILURE);\r
 533             }\r
 534 \r
 535 #ifdef __WITH_DTLS__\r
 536             CARegisterDTLSHandshakeCallback(NULL);\r
 537 #endif // __WITH_DTLS__\r
 538             res = RemoveCredential(&peer->deviceID);\r
 539             if(OC_STACK_RESOURCE_DELETED != res)\r
 540             {\r
 541                 OIC_LOG_V(ERROR, TAG, "Failed to remove temporal PSK : %d", res);\r
 542             }\r
 543 \r
 544             OICFree(g_dp_proceed_ctx);\r
 545             g_dp_proceed_ctx = NULL;\r
 546         }\r
 547         else\r
 548         {\r
 549             OIC_LOG_V(INFO, TAG, "DirectPairingDTLSHandshakeCB - Not matched to peer address");\r
 550         }\r
 551     }\r
 552 \r
 553     OIC_LOG_V(INFO, TAG, "OUT DirectPairingDTLSHandshakeCB");\r
 554 }\r
 555 \r
 556 /**\r
 557  * Callback handler of DPDirectPairing.\r
 558  *\r
 559  * @param[in] ctx             ctx value passed to callback from calling function.\r
 560  * @param[in] UNUSED          handle to an invocation\r
 561  * @param[in] clientResponse  Response from queries to remote servers.\r
 562  * @return  OC_STACK_DELETE_TRANSACTION to delete the transaction\r
 563  *          and  OC_STACK_KEEP_TRANSACTION to keep it.\r
 564  */\r
 565 static OCStackApplicationResult DirectPairingHandler(void *ctx, OCDoHandle UNUSED,\r
 566                                                   OCClientResponse *clientResponse)\r
 567 {\r
 568     OIC_LOG_V(INFO, TAG, "IN DirectPairingHandler.");\r
 569     (void)UNUSED;\r
 570     if(NULL == ctx)\r
 571     {\r
 572         OIC_LOG(ERROR, TAG, "Context is Null");\r
 573         return OC_STACK_DELETE_TRANSACTION;\r
 574     }\r
 575 \r
 576     OCStackResult res = OC_STACK_ERROR;\r
 577     DPairData_t *dpairData = (DPairData_t*)ctx;\r
 578     OCDirectPairingResultCB resultCallback = (OCDirectPairingResultCB)dpairData->resultCallback;\r
 579     OicUuid_t subjectId = {.id={0}};\r
 580 \r
 581     if (clientResponse)\r
 582     {\r
 583         if(OC_STACK_RESOURCE_CREATED == clientResponse->result)\r
 584         {\r
 585             // result\r
 586             OIC_LOG(INFO, TAG, "DirectPairingHandler : success POST request to /oic/sec/dpairing");\r
 587 \r
 588 #ifdef __WITH_DTLS__\r
 589             // Add temporary psk\r
 590             res = AddTmpPskWithPIN(&dpairData->peer->deviceID,\r
 591                            SYMMETRIC_PAIR_WISE_KEY,\r
 592                            (char*)dpairData->pin, DP_PIN_LENGTH,\r
 593                            1, &dpairData->peer->rowner, &subjectId);\r
 594             VERIFY_SUCCESS(TAG, OC_STACK_OK == res, ERROR);\r
 595 \r
 596 \r
 597             // Start to establish a secure channel with Pin-based PSK cipher suite\r
 598             CAResult_t caresult;\r
 599 \r
 600             caresult = CAEnableAnonECDHCipherSuite(false);\r
 601             VERIFY_SUCCESS(TAG, CA_STATUS_OK == caresult, ERROR);\r
 602 \r
 603             caresult = CASelectCipherSuite(TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA_256);\r
 604             VERIFY_SUCCESS(TAG, CA_STATUS_OK == caresult, ERROR);\r
 605 \r
 606             //Register proceeding peer info. & DTLS event handler to catch the dtls event while handshake\r
 607             g_dp_proceed_ctx = dpairData;\r
 608             res = CARegisterDTLSHandshakeCallback(DirectPairingDTLSHandshakeCB);\r
 609             VERIFY_SUCCESS(TAG, CA_STATUS_OK == caresult, ERROR);\r
 610 \r
 611             // initiate dtls\r
 612             CAEndpoint_t *endpoint = (CAEndpoint_t *)OICCalloc(1, sizeof (CAEndpoint_t));\r
 613             VERIFY_NON_NULL(TAG, endpoint, FATAL);\r
 614             memcpy(endpoint,&dpairData->peer->endpoint,sizeof(CAEndpoint_t));\r
 615             endpoint->port = dpairData->peer->securePort;\r
 616             OIC_LOG_V(INFO, TAG, "Initiate DTLS handshake to %s(%d)", endpoint->addr, endpoint->port);\r
 617 \r
 618             caresult = CAInitiateHandshake(endpoint);\r
 619             OICFree(endpoint);\r
 620             VERIFY_SUCCESS(TAG, CA_STATUS_OK == caresult, ERROR);\r
 621 #endif // __WITH_DTLS__\r
 622 \r
 623             res = OC_STACK_OK;\r
 624         }\r
 625         else\r
 626         {\r
 627             // result\r
 628             OIC_LOG(INFO, TAG, "DirectPairingHandler : fail POST request to /oic/sec/dpairing");\r
 629         }\r
 630     }\r
 631     else\r
 632     {\r
 633         OIC_LOG(ERROR, TAG, "DirectPairingHandler received Null clientResponse");\r
 634     }\r
 635 \r
 636 #ifdef __WITH_DTLS__\r
 637 exit:\r
 638 #endif // __WITH_DTLS__\r
 639 \r
 640     if (OC_STACK_OK != res)\r
 641     {\r
 642         if (0 < strlen((const char*)subjectId.id))\r
 643         {\r
 644             RemoveCredential(&dpairData->peer->deviceID);\r
 645             OICFree(dpairData);\r
 646             g_dp_proceed_ctx = NULL;\r
 647         }\r
 648 \r
 649         resultCallback(dpairData->peer, res);\r
 650     }\r
 651     OIC_LOG_V(INFO, TAG, "OUT DirectPairingHandler.");\r
 652     return OC_STACK_DELETE_TRANSACTION;\r
 653 }\r
 654 \r
 655 /**\r
 656  * Start direct-pairing .\r
 657  *\r
 658  * @param[in] peer  target device to establish direct-pairing.\r
 659  * @param[in] pmSel  selected pairing method.\r
 660  * @param[in] pinNumber  secret value for dtls connection.\r
 661  *\r
 662  * @return OC_STACK_OK on success otherwise error.\r
 663  */\r
 664 OCStackResult DPDirectPairing(OCDirectPairingDev_t* peer, OicSecPrm_t pmSel, char *pinNumber,\r
 665                                                      OCDirectPairingResultCB resultCallback)\r
 666 {\r
 667     if(NULL == peer || NULL == pinNumber)\r
 668     {\r
 669         return OC_STACK_INVALID_PARAM;\r
 670     }\r
 671 \r
 672     OicUuid_t deviceID =   {.id={0}};\r
 673     if (OC_STACK_OK != GetDoxmDeviceID(&deviceID))\r
 674     {\r
 675         OIC_LOG(ERROR, TAG, "Error while retrieving device ID");\r
 676         return OC_STACK_ERROR;\r
 677     }\r
 678 \r
 679     OicSecDpairing_t dpair;\r
 680     memset(&dpair, 0, sizeof(OicSecDpairing_t));\r
 681     dpair.spm = pmSel;\r
 682     memcpy(&dpair.pdeviceID, &deviceID, sizeof(OicUuid_t));\r
 683 \r
 684     OCSecurityPayload* secPayload = (OCSecurityPayload*)OICCalloc(1, sizeof(OCSecurityPayload));\r
 685     if(!secPayload)\r
 686     {\r
 687         OIC_LOG(ERROR, TAG, "Failed to memory allocation");\r
 688         return OC_STACK_NO_MEMORY;\r
 689     }\r
 690     secPayload->base.type = PAYLOAD_TYPE_SECURITY;\r
 691     secPayload->securityData = BinToDpairingJSON(&dpair);\r
 692     if(NULL == secPayload->securityData)\r
 693     {\r
 694         OICFree(secPayload);\r
 695         OIC_LOG(ERROR, TAG, "Failed to BinToDpairingJSON");\r
 696         return OC_STACK_NO_MEMORY;\r
 697     }\r
 698     OIC_LOG_V(INFO, TAG, "DPAIRING : %s", secPayload->securityData);\r
 699 \r
 700     char query[MAX_URI_LENGTH + MAX_QUERY_LENGTH] = {0};\r
 701     if(!DPGenerateQuery(false,\r
 702                         peer->endpoint.addr,\r
 703                         peer->endpoint.port,\r
 704                         //peer->securePort,\r
 705                         peer->connType,\r
 706                         query, sizeof(query), OIC_RSRC_DPAIRING_URI))\r
 707     {\r
 708         OIC_LOG(ERROR, TAG, "DPDirectPairing : Failed to generate query");\r
 709         return OC_STACK_ERROR;\r
 710     }\r
 711     OIC_LOG_V(DEBUG, TAG, "Query=%s", query);\r
 712 \r
 713     DPairData_t *dpairData = (DPairData_t *) OICCalloc(1, sizeof(DPairData_t));\r
 714     if (dpairData == NULL)\r
 715     {\r
 716         OICFree(secPayload->securityData);\r
 717         OICFree(secPayload);\r
 718         OIC_LOG(ERROR, TAG, "Unable to allocate memory");\r
 719         return OC_STACK_NO_MEMORY;\r
 720     }\r
 721     dpairData->peer = peer;\r
 722     memcpy(dpairData->pin, pinNumber, DP_PIN_LENGTH);\r
 723     dpairData->resultCallback = resultCallback;\r
 724 \r
 725     OCCallbackData cbData =  {.context=NULL, .cb=NULL, .cd=NULL};\r
 726     cbData.cb = DirectPairingHandler;\r
 727     cbData.context = (void*)dpairData;\r
 728     cbData.cd = NULL;\r
 729 \r
 730     OCMethod method = OC_REST_POST;\r
 731     OCDoHandle handle = NULL;\r
 732     OIC_LOG(DEBUG, TAG, "Sending DPAIRNG setting to resource server");\r
 733     OCStackResult ret = OCDoResource(&handle, method, query,\r
 734             &peer->endpoint, (OCPayload*)secPayload,\r
 735             peer->connType, OC_LOW_QOS, &cbData, NULL, 0);\r
 736     if(OC_STACK_OK != ret)\r
 737     {\r
 738         OIC_LOG(ERROR, TAG, "error in OCDoResource");\r
 739         return OC_STACK_ERROR;\r
 740     }\r
 741 \r
 742     return OC_STACK_OK;\r
 743 \r
 744  }\r
 745 \r
 746 /**\r
 747  * Callback handler for getting secure port information using /oic/res discovery.\r
 748  *\r
 749  * @param[in] ctx             user context\r
 750  * @param[in] handle          Handle for response\r
 751  * @param[in] clientResponse  Response information(It will contain payload)\r
 752  *\r
 753  * @return OC_STACK_KEEP_TRANSACTION to keep transaction and\r
 754  *         OC_STACK_DELETE_TRANSACTION to delete it.\r
 755  */\r
 756 static OCStackApplicationResult DirectPairingPortDiscoveryHandler(void *ctx, OCDoHandle UNUSED,\r
 757                                  OCClientResponse *clientResponse)\r
 758 {\r
 759     OIC_LOG(INFO, TAG, "Callback Context for Direct-Pairing Secure Port DISCOVER query recvd successfully");\r
 760 \r
 761     (void)ctx;\r
 762     (void)UNUSED;\r
 763     if (clientResponse)\r
 764     {\r
 765         if  (NULL == clientResponse->payload)\r
 766         {\r
 767             OIC_LOG(INFO, TAG, "Skiping Null payload");\r
 768         }\r
 769         else\r
 770         {\r
 771             if (PAYLOAD_TYPE_DISCOVERY != clientResponse->payload->type)\r
 772             {\r
 773                 OIC_LOG(INFO, TAG, "Wrong payload type");\r
 774                 return OC_STACK_DELETE_TRANSACTION;\r
 775             }\r
 776 \r
 777             uint16_t securePort = 0;\r
 778             OCResourcePayload* resPayload = ((OCDiscoveryPayload*)clientResponse->payload)->resources;\r
 779             OIC_LOG_PAYLOAD(INFO, clientResponse->payload);\r
 780 \r
 781             if (resPayload && resPayload->secure)\r
 782             {\r
 783                 securePort = resPayload->port;\r
 784             }\r
 785             else\r
 786             {\r
 787                 OIC_LOG(INFO, TAG, "Can not find secure port information.");\r
 788                 return OC_STACK_DELETE_TRANSACTION;\r
 789             }\r
 790 \r
 791             OCDirectPairingDev_t *ptr = getDev(&g_dp_discover,\r
 792                     clientResponse->devAddr.addr, clientResponse->devAddr.port);\r
 793             if(!ptr)\r
 794             {\r
 795                 OIC_LOG(ERROR, TAG, "Can not find device information in the discovery device list");\r
 796                 return OC_STACK_DELETE_TRANSACTION;\r
 797             }\r
 798             ptr->securePort = securePort;\r
 799 \r
 800             OIC_LOG(INFO, TAG, "Exiting DirectPairingPortDiscoveryHandler.");\r
 801         }\r
 802 \r
 803         return  OC_STACK_DELETE_TRANSACTION;\r
 804     }\r
 805     else\r
 806     {\r
 807         OIC_LOG(INFO, TAG, "Skiping Null response");\r
 808     }\r
 809     return  OC_STACK_DELETE_TRANSACTION;\r
 810 }\r
 811 \r
 812 /**\r
 813  * Callback handler for DPDeviceDiscovery API.\r
 814  *\r
 815  * @param[in] ctx             User context\r
 816  * @param[in] handle          Handler for response\r
 817  * @param[in] clientResponse  Response information (It will contain payload)\r
 818  * @return OC_STACK_KEEP_TRANSACTION to keep transaction and\r
 819  *         OC_STACK_DELETE_TRANSACTION to delete it.\r
 820  */\r
 821 static OCStackApplicationResult DirectPairingDiscoveryHandler(void* ctx, OCDoHandle UNUSED,\r
 822         OCClientResponse * clientResponse)\r
 823 {\r
 824     OIC_LOG(INFO, TAG, "Callback Context for Direct-Pairing DISCOVER query recvd successfully");\r
 825 \r
 826     (void)ctx;\r
 827     (void)UNUSED;\r
 828     if (clientResponse)\r
 829     {\r
 830         OIC_LOG_V(INFO, TAG, "StackResult: %d", clientResponse->result);\r
 831         OIC_LOG_V(INFO, TAG,\r
 832                 "Device =============> Discovered @ %s:%d",\r
 833                 clientResponse->devAddr.addr,\r
 834                 clientResponse->devAddr.port);\r
 835 \r
 836         if  (NULL == clientResponse->payload)\r
 837         {\r
 838             OIC_LOG(INFO, TAG, "Skiping Null payload");\r
 839             return OC_STACK_KEEP_TRANSACTION;\r
 840         }\r
 841         if (OC_STACK_OK != clientResponse->result)\r
 842         {\r
 843             OIC_LOG(INFO, TAG, "Error in response");\r
 844             return OC_STACK_KEEP_TRANSACTION;\r
 845         }\r
 846 \r
 847         OIC_LOG_PAYLOAD(INFO, clientResponse->payload);\r
 848         OicSecPconf_t *pconf = JSONToPconfBin(\r
 849                     ((OCSecurityPayload*)clientResponse->payload)->securityData);\r
 850         if (NULL == pconf)\r
 851         {\r
 852             OIC_LOG(INFO, TAG, "Ignoring malformed JSON");\r
 853             return OC_STACK_KEEP_TRANSACTION;\r
 854         }\r
 855         else\r
 856         {\r
 857             OCDevAddr endpoint;\r
 858             memcpy(&endpoint, &clientResponse->devAddr, sizeof(OCDevAddr));\r
 859 \r
 860             OCStackResult res = addDev(&g_dp_discover, &endpoint,\r
 861                         clientResponse->connType, pconf);\r
 862             DeletePconfBinData(pconf);\r
 863             if (OC_STACK_OK != res)\r
 864             {\r
 865                 OIC_LOG(ERROR, TAG, "Error while adding data to linkedlist.");\r
 866                 return OC_STACK_KEEP_TRANSACTION;\r
 867             }\r
 868 \r
 869 \r
 870             char rsrc_uri[MAX_URI_LENGTH+1] = {0};\r
 871             int wr_len = snprintf(rsrc_uri, sizeof(rsrc_uri), "%s?%s=%s",\r
 872                       OC_RSRVD_WELL_KNOWN_URI, OC_RSRVD_RESOURCE_TYPE, OIC_RSRC_TYPE_SEC_DPAIRING);\r
 873             if(wr_len <= 0 || (size_t)wr_len >= sizeof(rsrc_uri))\r
 874             {\r
 875                 OIC_LOG(ERROR, TAG, "rsrc_uri_string_print failed");\r
 876                 return OC_STACK_KEEP_TRANSACTION;\r
 877             }\r
 878 \r
 879             //Try to the unicast discovery to getting secure port\r
 880             char query[MAX_URI_LENGTH+MAX_QUERY_LENGTH+1] = {0};\r
 881             if(!DPGenerateQuery(false,\r
 882                                 clientResponse->devAddr.addr, clientResponse->devAddr.port,\r
 883                                 clientResponse->connType,\r
 884                                 query, sizeof(query), rsrc_uri))\r
 885             {\r
 886                 OIC_LOG(ERROR, TAG, "DirectPairingDiscoveryHandler : Failed to generate query");\r
 887                 return OC_STACK_KEEP_TRANSACTION;\r
 888             }\r
 889             OIC_LOG_V(DEBUG, TAG, "Query=%s", query);\r
 890 \r
 891             OCCallbackData cbData;\r
 892             cbData.cb = &DirectPairingPortDiscoveryHandler;\r
 893             cbData.context = NULL;\r
 894             cbData.cd = NULL;\r
 895             OCStackResult ret = OCDoResource(NULL, OC_REST_DISCOVER, query, 0, 0,\r
 896                     clientResponse->connType, OC_LOW_QOS, &cbData, NULL, 0);\r
 897             if(OC_STACK_OK != ret)\r
 898             {\r
 899                 OIC_LOG(ERROR, TAG, "Failed to Secure Port Discovery");\r
 900                 return OC_STACK_KEEP_TRANSACTION;\r
 901             }\r
 902             else\r
 903             {\r
 904                 OIC_LOG_V(INFO, TAG, "OCDoResource with [%s] Success", query);\r
 905             }\r
 906 \r
 907             return  OC_STACK_KEEP_TRANSACTION;\r
 908         }\r
 909     }\r
 910     else\r
 911     {\r
 912         OIC_LOG(INFO, TAG, "Skiping Null response");\r
 913     }\r
 914 \r
 915     return OC_STACK_DELETE_TRANSACTION;\r
 916 }\r
 917 \r
 918 #ifndef WITH_ARDUINO\r
 919 /**\r
 920  * Discover direct-pairing devices in the same IP subnet. .\r
 921  *\r
 922  * @param[in] waittime  Timeout in seconds.\r
 923  *\r
 924  * @return OC_STACK_OK on success otherwise error.\r
 925  */\r
 926 OCStackResult DPDeviceDiscovery(unsigned short waittime)\r
 927 {\r
 928     OIC_LOG(DEBUG, TAG, "IN DPDeviceDiscovery");\r
 929 \r
 930     if (g_dp_discover)\r
 931     {\r
 932         delList(g_dp_discover);\r
 933         g_dp_discover = NULL;\r
 934     }\r
 935 \r
 936     OCStackResult ret;\r
 937     struct timespec startTime = {.tv_sec=0, .tv_nsec=0};\r
 938     struct timespec currTime  = {.tv_sec=0, .tv_nsec=0};\r
 939     struct timespec timeout;\r
 940 \r
 941     const char DP_DISCOVERY_QUERY[] = "/oic/sec/pconf";\r
 942 \r
 943     OCCallbackData cbData;\r
 944     cbData.cb = DirectPairingDiscoveryHandler;\r
 945     cbData.context = NULL;\r
 946     cbData.cd = NULL;\r
 947 \r
 948     /* Start a DP discovery query*/\r
 949     OIC_LOG_V(INFO, TAG, "Initiating Direct-Pairing Discovery : %s\n", DP_DISCOVERY_QUERY);\r
 950     OCDoHandle handle = NULL;\r
 951     ret = OCDoResource(&handle, OC_REST_DISCOVER, DP_DISCOVERY_QUERY, 0, 0, CT_DEFAULT,\r
 952                        OC_LOW_QOS, &cbData, NULL, 0);\r
 953     if (ret != OC_STACK_OK)\r
 954     {\r
 955         OIC_LOG(ERROR, TAG, "OCStack resource error");\r
 956         return ret;\r
 957     }\r
 958 \r
 959     // wait..\r
 960     timeout.tv_sec  = 0;\r
 961     timeout.tv_nsec = 100000000L;\r
 962 \r
 963     int clock_res = -1;\r
 964 #if defined(__ANDROID__) || _POSIX_TIMERS > 0\r
 965     clock_res = clock_gettime(CLOCK_MONOTONIC, &startTime);\r
 966 #endif\r
 967     if (0 != clock_res)\r
 968     {\r
 969         OIC_LOG(ERROR, TAG, "clock error");\r
 970         if(OC_STACK_OK !=  OCCancel(handle, OC_LOW_QOS, NULL, 0))\r
 971         {\r
 972             OIC_LOG(ERROR, TAG, "Failed to remove registered callback");\r
 973         }\r
 974         return OC_STACK_ERROR;\r
 975     }\r
 976 \r
 977     while (1)\r
 978     {\r
 979 #if defined(__ANDROID__) || _POSIX_TIMERS > 0\r
 980         clock_res = clock_gettime(CLOCK_MONOTONIC, &currTime);\r
 981 #endif\r
 982         if (0 != clock_res)\r
 983         {\r
 984             OIC_LOG(ERROR, TAG, "clock error");\r
 985             ret = OC_STACK_ERROR;\r
 986             break;\r
 987         }\r
 988         long elapsed = (currTime.tv_sec - startTime.tv_sec);\r
 989         if (elapsed > waittime)\r
 990         {\r
 991             break;\r
 992         }\r
 993         else\r
 994         {\r
 995             nanosleep(&timeout, NULL);\r
 996         }\r
 997     }\r
 998 \r
 999     //Waiting for each response.\r
1000     ret = OCCancel(handle, OC_LOW_QOS, NULL, 0);\r
1001     if (OC_STACK_OK != ret)\r
1002     {\r
1003         OIC_LOG(ERROR, TAG, "Failed to remove registered callback");\r
1004     }\r
1005     OIC_LOG(DEBUG, TAG, "OUT DPDeviceDiscovery");\r
1006     return ret;\r
1007 }\r
1008 #endif\r