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 //Persistent Storage callback handler for open/read/write/close/unlink
49 static OCPersistentStorage *gPersistentStorageHandler = NULL;
50 //Provisioning response callback
51 static SPResponseCallback gSPResponseHandler = NULL;
54 * A single global Policy Engine context will suffice as long
55 * as SRM is single-threaded.
57 PEContext_t g_policyEngineContext;
60 * Function to register provisoning API's response callback.
61 * @param respHandler response handler callback.
63 void SRMRegisterProvisioningResponseHandler(SPResponseCallback respHandler)
65 gSPResponseHandler = respHandler;
68 void SetResourceRequestType(PEContext_t *context, const char *resourceUri)
70 context->resourceType = GetSvrTypeFromUri(resourceUri);
73 static void SRMSendUnAuthorizedAccessresponse(PEContext_t *context)
75 CAResponseInfo_t responseInfo = {.result = CA_EMPTY};
77 if (NULL == context ||
78 NULL == context->amsMgrContext->requestInfo)
80 OIC_LOG_V(ERROR, TAG, "%s : NULL Parameter(s)",__func__);
84 memcpy(&responseInfo.info, &(context->amsMgrContext->requestInfo->info),
85 sizeof(responseInfo.info));
86 responseInfo.info.payload = NULL;
87 responseInfo.result = CA_UNAUTHORIZED_REQ;
88 responseInfo.info.dataType = CA_RESPONSE_DATA;
90 if (CA_STATUS_OK == CASendResponse(context->amsMgrContext->endpoint, &responseInfo))
92 OIC_LOG(DEBUG, TAG, "Succeed in sending response to a unauthorized request!");
96 OIC_LOG(ERROR, TAG, "Failed in sending response to a unauthorized request!");
100 void SRMSendResponse(SRMAccessResponse_t responseVal)
102 OIC_LOG(DEBUG, TAG, "Sending response to remote device");
104 if (IsAccessGranted(responseVal) && gRequestHandler)
106 OIC_LOG_V(INFO, TAG, "%s : Access granted. Passing Request to RI layer", __func__);
107 if (!g_policyEngineContext.amsMgrContext->endpoint ||
108 !g_policyEngineContext.amsMgrContext->requestInfo)
110 OIC_LOG_V(ERROR, TAG, "%s : Invalid arguments", __func__);
111 SRMSendUnAuthorizedAccessresponse(&g_policyEngineContext);
114 gRequestHandler(g_policyEngineContext.amsMgrContext->endpoint,
115 g_policyEngineContext.amsMgrContext->requestInfo);
119 OIC_LOG_V(INFO, TAG, "%s : ACCESS_DENIED.", __func__);
120 SRMSendUnAuthorizedAccessresponse(&g_policyEngineContext);
124 //Resetting PE state to AWAITING_REQUEST
125 SetPolicyEngineState(&g_policyEngineContext, AWAITING_REQUEST);
129 * Handle the request from the SRM.
131 * @param endPoint object from which the response is received.
132 * @param requestInfo contains information for the request.
134 void SRMRequestHandler(const CAEndpoint_t *endPoint, const CARequestInfo_t *requestInfo)
136 OIC_LOG(DEBUG, TAG, "Received request from remote device");
138 bool isRequestOverSecureChannel = false;
139 if (!endPoint || !requestInfo)
141 OIC_LOG(ERROR, TAG, "Invalid arguments");
145 // Copy the subjectID
146 OicUuid_t subjectId = {.id = {0}};
147 memcpy(subjectId.id, requestInfo->info.identity.id, sizeof(subjectId.id));
148 if (endPoint->flags & CA_SECURE)
150 OIC_LOG(INFO, TAG, "request over secure channel");
151 isRequestOverSecureChannel = true;
154 //Check the URI has the query and skip it before checking the permission
155 if (NULL == requestInfo->info.resourceUri)
157 OIC_LOG(ERROR, TAG, "Invalid resourceUri");
161 char *uri = strstr(requestInfo->info.resourceUri, "?");
165 //Skip query and pass the resource uri
166 position = uri - requestInfo->info.resourceUri;
170 position = strlen(requestInfo->info.resourceUri);
172 if (MAX_URI_LENGTH < position || 0 > position)
174 OIC_LOG(ERROR, TAG, "Incorrect URI length");
177 SRMAccessResponse_t response = ACCESS_DENIED;
178 char newUri[MAX_URI_LENGTH + 1];
179 OICStrcpyPartial(newUri, MAX_URI_LENGTH + 1, requestInfo->info.resourceUri, position);
181 SetResourceRequestType(&g_policyEngineContext, newUri);
183 // Form a 'Error', 'slow response' or 'access deny' response and send to peer
184 CAResponseInfo_t responseInfo = {.result = CA_EMPTY};
185 memcpy(&responseInfo.info, &(requestInfo->info), sizeof(responseInfo.info));
186 responseInfo.info.payload = NULL;
187 responseInfo.info.dataType = CA_RESPONSE_DATA;
189 OCResource *resPtr = FindResourceByUri(newUri);
192 // All vertical secure resources and SVR resources other than DOXM & PSTAT should reject request
194 if ((((resPtr->resourceProperties) & OC_SECURE)
195 && (g_policyEngineContext.resourceType == NOT_A_SVR_RESOURCE))
196 || ((g_policyEngineContext.resourceType < OIC_SEC_SVR_TYPE_COUNT)
197 && (g_policyEngineContext.resourceType != OIC_R_DOXM_TYPE)
198 && (g_policyEngineContext.resourceType != OIC_R_PSTAT_TYPE)))
200 // if resource is secure and request is over insecure channel
201 if (!isRequestOverSecureChannel)
203 // Reject all the requests over coap for secure resource.
204 responseInfo.result = CA_FORBIDDEN_REQ;
205 if (CA_STATUS_OK != CASendResponse(endPoint, &responseInfo))
207 OIC_LOG(ERROR, TAG, "Failed in sending response to a unauthorized request!");
213 #ifdef _ENABLE_MULTIPLE_OWNER_
215 * In case of ACL and CRED, The payload required to verify the payload.
216 * Payload information will be used for subowner's permission verification.
218 g_policyEngineContext.payload = (uint8_t*)requestInfo->info.payload;
219 g_policyEngineContext.payloadSize = requestInfo->info.payloadSize;
220 #endif //_ENABLE_MULTIPLE_OWNER_
222 //New request are only processed if the policy engine state is AWAITING_REQUEST.
223 if (AWAITING_REQUEST == g_policyEngineContext.state)
225 OIC_LOG_V(DEBUG, TAG, "Processing request with uri, %s for method, %d",
226 requestInfo->info.resourceUri, requestInfo->method);
227 response = CheckPermission(&g_policyEngineContext, &subjectId, newUri,
228 GetPermissionFromCAMethod_t(requestInfo->method));
232 OIC_LOG_V(INFO, TAG, "PE state %d. Ignoring request with uri, %s for method, %d",
233 g_policyEngineContext.state, requestInfo->info.resourceUri, requestInfo->method);
236 if (IsAccessGranted(response) && gRequestHandler)
238 gRequestHandler(endPoint, requestInfo);
242 VERIFY_NON_NULL(TAG, gRequestHandler, ERROR);
244 if (ACCESS_WAITING_FOR_AMS == response)
246 OIC_LOG(INFO, TAG, "Sending slow response");
248 UpdateAmsMgrContext(&g_policyEngineContext, endPoint, requestInfo);
249 responseInfo.result = CA_EMPTY;
250 responseInfo.info.type = CA_MSG_ACKNOWLEDGE;
255 * TODO Enhance this logic more to decide between
256 * CA_UNAUTHORIZED_REQ or CA_FORBIDDEN_REQ depending
257 * upon SRMAccessResponseReasonCode_t
259 OIC_LOG(INFO, TAG, "Sending for regular response");
260 responseInfo.result = CA_UNAUTHORIZED_REQ;
263 if (CA_STATUS_OK != CASendResponse(endPoint, &responseInfo))
265 OIC_LOG(ERROR, TAG, "Failed in sending response to a unauthorized request!");
269 responseInfo.result = CA_INTERNAL_SERVER_ERROR;
270 if (CA_STATUS_OK != CASendResponse(endPoint, &responseInfo))
272 OIC_LOG(ERROR, TAG, "Failed in sending response to a unauthorized request!");
277 * Handle the response from the SRM.
279 * @param endPoint points to the remote endpoint.
280 * @param responseInfo contains response information from the endpoint.
282 void SRMResponseHandler(const CAEndpoint_t *endPoint, const CAResponseInfo_t *responseInfo)
284 OIC_LOG(DEBUG, TAG, "Received response from remote device");
286 // isProvResponse flag is to check whether response is catered by provisioning APIs or not.
287 // When token sent by CA response matches with token generated by provisioning request,
288 // gSPResponseHandler returns true and response is not sent to RI layer. In case
289 // gSPResponseHandler is null and isProvResponse is false response then the response is for
291 bool isProvResponse = false;
293 if (gSPResponseHandler)
295 isProvResponse = gSPResponseHandler(endPoint, responseInfo);
297 if (!isProvResponse && gResponseHandler)
299 gResponseHandler(endPoint, responseInfo);
304 * Handle the error from the SRM.
306 * @param endPoint is the remote endpoint.
307 * @param errorInfo contains error information from the endpoint.
309 void SRMErrorHandler(const CAEndpoint_t *endPoint, const CAErrorInfo_t *errorInfo)
311 OIC_LOG_V(INFO, TAG, "Received error from remote device with result, %d for request uri, %s",
312 errorInfo->result, errorInfo->info.resourceUri);
315 gErrorHandler(endPoint, errorInfo);
319 OCStackResult SRMRegisterHandler(CARequestCallback reqHandler,
320 CAResponseCallback respHandler,
321 CAErrorCallback errHandler)
323 OIC_LOG(DEBUG, TAG, "SRMRegisterHandler !!");
324 if( !reqHandler || !respHandler || !errHandler)
326 OIC_LOG(ERROR, TAG, "Callback handlers are invalid");
327 return OC_STACK_INVALID_PARAM;
329 gRequestHandler = reqHandler;
330 gResponseHandler = respHandler;
331 gErrorHandler = errHandler;
334 #if defined(__WITH_DTLS__) || defined(__WITH_TLS__)
335 CARegisterHandler(SRMRequestHandler, SRMResponseHandler, SRMErrorHandler);
337 CARegisterHandler(reqHandler, respHandler, errHandler);
338 #endif /* __WITH_DTLS__ */
342 OCStackResult SRMRegisterPersistentStorageHandler(OCPersistentStorage* persistentStorageHandler)
344 OIC_LOG(DEBUG, TAG, "SRMRegisterPersistentStorageHandler !!");
345 if(!persistentStorageHandler)
347 OIC_LOG(ERROR, TAG, "The persistent storage handler is invalid");
348 return OC_STACK_INVALID_PARAM;
350 gPersistentStorageHandler = persistentStorageHandler;
354 OCPersistentStorage* SRMGetPersistentStorageHandler()
356 return gPersistentStorageHandler;
359 OCStackResult SRMInitSecureResources()
361 // TODO: temporarily returning OC_STACK_OK every time until default
362 // behavior (for when SVR DB is missing) is settled.
363 InitSecureResources();
364 OCStackResult ret = OC_STACK_OK;
365 #if defined(__WITH_DTLS__) || defined(__WITH_TLS__)
366 if (CA_STATUS_OK != CAregisterPskCredentialsHandler(GetDtlsPskCredentials))
368 OIC_LOG(ERROR, TAG, "Failed to revert TLS credential handler.");
369 ret = OC_STACK_ERROR;
371 CAregisterPkixInfoHandler(GetPkixInfo);
372 CAregisterGetCredentialTypesHandler(InitCipherSuiteList);
373 #endif // __WITH_DTLS__ or __WITH_TLS__
377 void SRMDeInitSecureResources()
379 DestroySecureResources();
382 OCStackResult SRMInitPolicyEngine()
384 return InitPolicyEngine(&g_policyEngineContext);
387 void SRMDeInitPolicyEngine()
389 DeInitPolicyEngine(&g_policyEngineContext);
392 bool SRMIsSecurityResourceURI(const char* uri)
399 const char *rsrcs[] = {
408 OIC_RSRC_DPAIRING_URI,
410 OC_RSRVD_PROV_CRL_URL
413 // Remove query from Uri for resource string comparison
414 size_t uriLen = strlen(uri);
415 char *query = strchr (uri, '?');
418 uriLen = query - uri;
421 for (size_t i = 0; i < sizeof(rsrcs)/sizeof(rsrcs[0]); i++)
423 size_t svrLen = strlen(rsrcs[i]);
425 if ((uriLen == svrLen) &&
426 (strncmp(uri, rsrcs[i], svrLen) == 0))
436 * Get the Secure Virtual Resource (SVR) type from the URI.
437 * @param uri [IN] Pointer to URI in question.
438 * @return The OicSecSvrType_t of the URI passed (note: if not a Secure Virtual
439 Resource, e.g. /a/light, will return "NOT_A_SVR_TYPE" enum value)
441 static const char URI_QUERY_CHAR = '?';
442 OicSecSvrType_t GetSvrTypeFromUri(const char* uri)
446 return NOT_A_SVR_RESOURCE;
449 // Remove query from Uri for resource string comparison
450 size_t uriLen = strlen(uri);
451 char *query = strchr (uri, URI_QUERY_CHAR);
454 uriLen = query - uri;
459 svrLen = strlen(OIC_RSRC_ACL_URI);
462 if(0 == strncmp(uri, OIC_RSRC_ACL_URI, svrLen))
464 return OIC_R_ACL_TYPE;
468 svrLen = strlen(OIC_RSRC_AMACL_URI);
471 if(0 == strncmp(uri, OIC_RSRC_AMACL_URI, svrLen))
473 return OIC_R_AMACL_TYPE;
477 svrLen = strlen(OIC_RSRC_CRED_URI);
480 if(0 == strncmp(uri, OIC_RSRC_CRED_URI, svrLen))
482 return OIC_R_CRED_TYPE;
486 svrLen = strlen(OIC_RSRC_CRL_URI);
489 if(0 == strncmp(uri, OIC_RSRC_CRL_URI, svrLen))
491 return OIC_R_CRL_TYPE;
495 svrLen = strlen(OIC_RSRC_DOXM_URI);
498 if(0 == strncmp(uri, OIC_RSRC_DOXM_URI, svrLen))
500 return OIC_R_DOXM_TYPE;
504 svrLen = strlen(OIC_RSRC_DPAIRING_URI);
507 if(0 == strncmp(uri, OIC_RSRC_DPAIRING_URI, svrLen))
509 return OIC_R_DPAIRING_TYPE;
513 svrLen = strlen(OIC_RSRC_PCONF_URI);
516 if(0 == strncmp(uri, OIC_RSRC_PCONF_URI, svrLen))
518 return OIC_R_PCONF_TYPE;
522 svrLen = strlen(OIC_RSRC_PSTAT_URI);
525 if(0 == strncmp(uri, OIC_RSRC_PSTAT_URI, svrLen))
527 return OIC_R_PSTAT_TYPE;
531 svrLen = strlen(OIC_RSRC_SVC_URI);
534 if(0 == strncmp(uri, OIC_RSRC_SVC_URI, svrLen))
536 return OIC_R_SVC_TYPE;
540 svrLen = strlen(OIC_RSRC_SACL_URI);
543 if(0 == strncmp(uri, OIC_RSRC_SACL_URI, svrLen))
545 return OIC_R_SACL_TYPE;
549 return NOT_A_SVR_RESOURCE;