1 //******************************************************************
3 // Copyright 2015 Intel Mobile Communications GmbH All Rights Reserved.
5 //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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
11 // http://www.apache.org/licenses/LICENSE-2.0
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.
19 //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
24 #include "cainterface.h"
25 #include "resourcemanager.h"
26 #include "credresource.h"
27 #include "policyengine.h"
28 #include "srmutility.h"
30 #include "oic_string.h"
31 #include "oic_malloc.h"
32 #include "securevirtualresourcetypes.h"
33 #include "secureresourcemanager.h"
34 #include "srmresourcestrings.h"
35 #include "ocresourcehandler.h"
37 #if defined( __WITH_TLS__) || defined(__WITH_DTLS__)
38 #include "pkix_interface.h"
39 #endif //__WITH_TLS__ or __WITH_DTLS__
42 //Request Callback handler
43 static CARequestCallback gRequestHandler = NULL;
44 //Response Callback handler
45 static CAResponseCallback gResponseHandler = NULL;
46 //Error Callback handler
47 static CAErrorCallback gErrorHandler = NULL;
48 //Provisioning response callback
49 static SPResponseCallback gSPResponseHandler = NULL;
52 * A single global Policy Engine context will suffice as long
53 * as SRM is single-threaded.
55 PEContext_t g_policyEngineContext;
59 * Function to retrieve the length of the resource URI address part.
61 * @param resourceUri A null-terminated string representing the resource URI.
63 * @return Length of the resource URI address or -1, if failed.
65 static int GetResourceUriAddressLength(CAURI_t resourceUri)
69 OIC_LOG(ERROR, TAG, "Missing resource URI");
73 size_t resourceUriLength = strlen(resourceUri);
74 if (resourceUriLength > MAX_URI_LENGTH)
76 OIC_LOG(ERROR, TAG, "Invalid resource URI length");
80 //Check the URI has the query and skip it before checking the permission
81 char *uri = strstr(resourceUri, "?");
83 return uri ? (int)(uri - resourceUri) : (int)resourceUriLength;
87 * Function to register provisoning API's response callback.
88 * @param respHandler response handler callback.
90 void SRMRegisterProvisioningResponseHandler(SPResponseCallback respHandler)
92 gSPResponseHandler = respHandler;
95 void SetResourceRequestType(PEContext_t *context, const char *resourceUri)
97 context->resourceType = GetSvrTypeFromUri(resourceUri);
100 static void SRMSendUnAuthorizedAccessresponse(PEContext_t *context)
102 CAResponseInfo_t responseInfo = {.result = CA_EMPTY};
104 if (NULL == context ||
105 NULL == context->amsMgrContext->requestInfo)
107 OIC_LOG_V(ERROR, TAG, "%s : NULL Parameter(s)",__func__);
111 memcpy(&responseInfo.info, &(context->amsMgrContext->requestInfo->info),
112 sizeof(responseInfo.info));
113 responseInfo.info.payload = NULL;
114 responseInfo.result = CA_UNAUTHORIZED_REQ;
115 responseInfo.info.dataType = CA_RESPONSE_DATA;
117 if (CA_STATUS_OK == CASendResponse(context->amsMgrContext->endpoint, &responseInfo))
119 OIC_LOG(DEBUG, TAG, "Succeed in sending response to a unauthorized request!");
123 OIC_LOG(ERROR, TAG, "Failed in sending response to a unauthorized request!");
127 void SRMSendResponse(SRMAccessResponse_t responseVal)
129 OIC_LOG(DEBUG, TAG, "Sending response to remote device");
131 if (IsAccessGranted(responseVal) && gRequestHandler)
133 OIC_LOG_V(INFO, TAG, "%s : Access granted. Passing Request to RI layer", __func__);
134 if (!g_policyEngineContext.amsMgrContext->endpoint ||
135 !g_policyEngineContext.amsMgrContext->requestInfo)
137 OIC_LOG_V(ERROR, TAG, "%s : Invalid arguments", __func__);
138 SRMSendUnAuthorizedAccessresponse(&g_policyEngineContext);
141 gRequestHandler(g_policyEngineContext.amsMgrContext->endpoint,
142 g_policyEngineContext.amsMgrContext->requestInfo);
146 OIC_LOG_V(INFO, TAG, "%s : ACCESS_DENIED.", __func__);
147 SRMSendUnAuthorizedAccessresponse(&g_policyEngineContext);
151 //Resetting PE state to AWAITING_REQUEST
152 SetPolicyEngineState(&g_policyEngineContext, AWAITING_REQUEST);
156 * Handle the request from the SRM.
158 * @param endPoint object from which the response is received.
159 * @param requestInfo contains information for the request.
161 void SRMRequestHandler(const CAEndpoint_t *endPoint, const CARequestInfo_t *requestInfo)
163 OIC_LOG(DEBUG, TAG, "Received request from remote device");
165 bool isRequestOverSecureChannel = false;
166 if (!endPoint || !requestInfo)
168 OIC_LOG(ERROR, TAG, "Invalid arguments");
172 // Copy the subjectID
173 OicUuid_t subjectId = {.id = {0}};
174 OicUuid_t nullSubjectId = {.id = {0}};
175 memcpy(subjectId.id, requestInfo->info.identity.id, sizeof(subjectId.id));
177 //If subject id is null that means request is sent thru coap.
178 if ( (endPoint->flags & CA_SECURE)
179 || (memcmp(subjectId.id, nullSubjectId.id, sizeof(subjectId.id)) != 0))
181 OIC_LOG(INFO, TAG, "request over secure channel");
182 isRequestOverSecureChannel = true;
185 CAURI_t resourceUri = requestInfo->info.resourceUri;
186 int resourceUriAddressLength = GetResourceUriAddressLength(resourceUri);
188 if (resourceUriAddressLength < 0)
193 SRMAccessResponse_t response = ACCESS_DENIED;
194 char newUri[MAX_URI_LENGTH + 1];
195 OICStrcpyPartial(newUri, MAX_URI_LENGTH + 1, resourceUri, resourceUriAddressLength);
197 SetResourceRequestType(&g_policyEngineContext, newUri);
199 // Form a 'Error', 'slow response' or 'access deny' response and send to peer
200 CAResponseInfo_t responseInfo = {.result = CA_EMPTY};
201 memcpy(&responseInfo.info, &(requestInfo->info), sizeof(responseInfo.info));
202 responseInfo.info.payload = NULL;
203 responseInfo.info.dataType = CA_RESPONSE_DATA;
205 OCResource *resPtr = FindResourceByUri(newUri);
208 // All vertical secure resources and SVR resources other than DOXM & PSTAT should reject request
210 if ((((resPtr->resourceProperties) & OC_SECURE)
211 && (g_policyEngineContext.resourceType == NOT_A_SVR_RESOURCE))
212 || ((g_policyEngineContext.resourceType < OIC_SEC_SVR_TYPE_COUNT)
213 && (g_policyEngineContext.resourceType != OIC_R_DOXM_TYPE)
214 && (g_policyEngineContext.resourceType != OIC_R_PSTAT_TYPE)))
216 // if resource is secure and request is over insecure channel
217 if (!isRequestOverSecureChannel)
219 // Reject all the requests over coap for secure resource.
220 responseInfo.result = CA_FORBIDDEN_REQ;
221 if (CA_STATUS_OK != CASendResponse(endPoint, &responseInfo))
223 OIC_LOG(ERROR, TAG, "Failed in sending response to a unauthorized request!");
229 #ifdef MULTIPLE_OWNER
231 * In case of ACL and CRED, The payload required to verify the payload.
232 * Payload information will be used for subowner's permission verification.
234 g_policyEngineContext.payload = (uint8_t*)requestInfo->info.payload;
235 g_policyEngineContext.payloadSize = requestInfo->info.payloadSize;
236 #endif //MULTIPLE_OWNER
238 //New request are only processed if the policy engine state is AWAITING_REQUEST.
239 if (AWAITING_REQUEST == g_policyEngineContext.state)
241 OIC_LOG_V(DEBUG, TAG, "Processing request with uri, %s for method, %d",
242 resourceUri, requestInfo->method);
243 response = CheckPermission(&g_policyEngineContext, &subjectId, newUri,
244 GetPermissionFromCAMethod_t(requestInfo->method));
248 OIC_LOG_V(INFO, TAG, "PE state %d. Ignoring request with uri, %s for method, %d",
249 g_policyEngineContext.state, resourceUri, requestInfo->method);
252 if (IsAccessGranted(response) && gRequestHandler)
254 gRequestHandler(endPoint, requestInfo);
258 VERIFY_NOT_NULL(TAG, gRequestHandler, ERROR);
260 if (ACCESS_WAITING_FOR_AMS == response)
262 OIC_LOG(INFO, TAG, "Sending slow response");
264 UpdateAmsMgrContext(&g_policyEngineContext, endPoint, requestInfo);
265 responseInfo.result = CA_EMPTY;
266 responseInfo.info.type = CA_MSG_ACKNOWLEDGE;
271 * TODO Enhance this logic more to decide between
272 * CA_UNAUTHORIZED_REQ or CA_FORBIDDEN_REQ depending
273 * upon SRMAccessResponseReasonCode_t
275 OIC_LOG(INFO, TAG, "Sending for regular response");
276 responseInfo.result = CA_UNAUTHORIZED_REQ;
279 if (CA_STATUS_OK != CASendResponse(endPoint, &responseInfo))
281 OIC_LOG(ERROR, TAG, "Failed in sending response to a unauthorized request!");
285 responseInfo.result = CA_INTERNAL_SERVER_ERROR;
286 if (CA_STATUS_OK != CASendResponse(endPoint, &responseInfo))
288 OIC_LOG(ERROR, TAG, "Failed in sending response to a unauthorized request!");
293 * Handle the response from the SRM.
295 * @param endPoint points to the remote endpoint.
296 * @param responseInfo contains response information from the endpoint.
298 void SRMResponseHandler(const CAEndpoint_t *endPoint, const CAResponseInfo_t *responseInfo)
300 OIC_LOG(DEBUG, TAG, "Received response from remote device");
302 // isProvResponse flag is to check whether response is catered by provisioning APIs or not.
303 // When token sent by CA response matches with token generated by provisioning request,
304 // gSPResponseHandler returns true and response is not sent to RI layer. In case
305 // gSPResponseHandler is null and isProvResponse is false response then the response is for
307 bool isProvResponse = false;
309 if (gSPResponseHandler)
311 isProvResponse = gSPResponseHandler(endPoint, responseInfo);
313 if (!isProvResponse && gResponseHandler)
315 gResponseHandler(endPoint, responseInfo);
320 * Handle the error from the SRM.
322 * @param endPoint is the remote endpoint.
323 * @param errorInfo contains error information from the endpoint.
325 void SRMErrorHandler(const CAEndpoint_t *endPoint, const CAErrorInfo_t *errorInfo)
327 OIC_LOG_V(INFO, TAG, "Received error from remote device with result, %d for request uri, %s",
328 errorInfo->result, errorInfo->info.resourceUri);
331 gErrorHandler(endPoint, errorInfo);
335 OCStackResult SRMRegisterHandler(CARequestCallback reqHandler,
336 CAResponseCallback respHandler,
337 CAErrorCallback errHandler)
339 OIC_LOG(DEBUG, TAG, "SRMRegisterHandler !!");
340 if( !reqHandler || !respHandler || !errHandler)
342 OIC_LOG(ERROR, TAG, "Callback handlers are invalid");
343 return OC_STACK_INVALID_PARAM;
345 gRequestHandler = reqHandler;
346 gResponseHandler = respHandler;
347 gErrorHandler = errHandler;
350 #if defined(__WITH_DTLS__) || defined(__WITH_TLS__)
351 CARegisterHandler(SRMRequestHandler, SRMResponseHandler, SRMErrorHandler);
353 CARegisterHandler(reqHandler, respHandler, errHandler);
354 #endif /* __WITH_DTLS__ */
358 OCStackResult SRMRegisterPersistentStorageHandler(OCPersistentStorage* persistentStorageHandler)
360 OIC_LOG(DEBUG, TAG, "SRMRegisterPersistentStorageHandler !!");
361 return OCRegisterPersistentStorageHandler(persistentStorageHandler);
364 OCPersistentStorage* SRMGetPersistentStorageHandler()
366 return OCGetPersistentStorageHandler();
369 OCStackResult SRMInitSecureResources()
371 // TODO: temporarily returning OC_STACK_OK every time until default
372 // behavior (for when SVR DB is missing) is settled.
373 InitSecureResources();
374 OCStackResult ret = OC_STACK_OK;
375 #if defined(__WITH_DTLS__) || defined(__WITH_TLS__)
376 if (CA_STATUS_OK != CAregisterPskCredentialsHandler(GetDtlsPskCredentials))
378 OIC_LOG(ERROR, TAG, "Failed to revert TLS credential handler.");
379 ret = OC_STACK_ERROR;
381 CAregisterPkixInfoHandler(GetPkixInfo);
382 CAregisterGetCredentialTypesHandler(InitCipherSuiteList);
383 #endif // __WITH_DTLS__ or __WITH_TLS__
387 void SRMDeInitSecureResources()
389 DestroySecureResources();
392 OCStackResult SRMInitPolicyEngine()
394 return InitPolicyEngine(&g_policyEngineContext);
397 void SRMDeInitPolicyEngine()
399 DeInitPolicyEngine(&g_policyEngineContext);
402 bool SRMIsSecurityResourceURI(const char* uri)
409 const char *rsrcs[] = {
418 OIC_RSRC_DPAIRING_URI,
420 OC_RSRVD_PROV_CRL_URL
423 // Remove query from Uri for resource string comparison
424 size_t uriLen = strlen(uri);
425 char *query = strchr (uri, '?');
428 uriLen = query - uri;
431 for (size_t i = 0; i < sizeof(rsrcs)/sizeof(rsrcs[0]); i++)
433 size_t svrLen = strlen(rsrcs[i]);
435 if ((uriLen == svrLen) &&
436 (strncmp(uri, rsrcs[i], svrLen) == 0))
446 * Get the Secure Virtual Resource (SVR) type from the URI.
447 * @param uri [IN] Pointer to URI in question.
448 * @return The OicSecSvrType_t of the URI passed (note: if not a Secure Virtual
449 Resource, e.g. /a/light, will return "NOT_A_SVR_TYPE" enum value)
451 static const char URI_QUERY_CHAR = '?';
452 OicSecSvrType_t GetSvrTypeFromUri(const char* uri)
456 return NOT_A_SVR_RESOURCE;
459 // Remove query from Uri for resource string comparison
460 size_t uriLen = strlen(uri);
461 char *query = strchr (uri, URI_QUERY_CHAR);
464 uriLen = query - uri;
469 svrLen = strlen(OIC_RSRC_ACL_URI);
472 if(0 == strncmp(uri, OIC_RSRC_ACL_URI, svrLen))
474 return OIC_R_ACL_TYPE;
478 svrLen = strlen(OIC_RSRC_AMACL_URI);
481 if(0 == strncmp(uri, OIC_RSRC_AMACL_URI, svrLen))
483 return OIC_R_AMACL_TYPE;
487 svrLen = strlen(OIC_RSRC_CRED_URI);
490 if(0 == strncmp(uri, OIC_RSRC_CRED_URI, svrLen))
492 return OIC_R_CRED_TYPE;
496 svrLen = strlen(OIC_RSRC_CRL_URI);
499 if(0 == strncmp(uri, OIC_RSRC_CRL_URI, svrLen))
501 return OIC_R_CRL_TYPE;
505 svrLen = strlen(OIC_RSRC_DOXM_URI);
508 if(0 == strncmp(uri, OIC_RSRC_DOXM_URI, svrLen))
510 return OIC_R_DOXM_TYPE;
514 svrLen = strlen(OIC_RSRC_DPAIRING_URI);
517 if(0 == strncmp(uri, OIC_RSRC_DPAIRING_URI, svrLen))
519 return OIC_R_DPAIRING_TYPE;
523 svrLen = strlen(OIC_RSRC_PCONF_URI);
526 if(0 == strncmp(uri, OIC_RSRC_PCONF_URI, svrLen))
528 return OIC_R_PCONF_TYPE;
532 svrLen = strlen(OIC_RSRC_PSTAT_URI);
535 if(0 == strncmp(uri, OIC_RSRC_PSTAT_URI, svrLen))
537 return OIC_R_PSTAT_TYPE;
541 svrLen = strlen(OIC_RSRC_SVC_URI);
544 if(0 == strncmp(uri, OIC_RSRC_SVC_URI, svrLen))
546 return OIC_R_SVC_TYPE;
550 svrLen = strlen(OIC_RSRC_SACL_URI);
553 if(0 == strncmp(uri, OIC_RSRC_SACL_URI, svrLen))
555 return OIC_R_SACL_TYPE;
559 return NOT_A_SVR_RESOURCE;