Change default settings to allow Ownership Transfer
[platform/upstream/iotivity.git] / resource / csdk / security / src / policyengine.c
index fd9f2ed..779688c 100644 (file)
@@ -37,7 +37,7 @@
 #include "amaclresource.h"
 #include "credresource.h"
 
-#define TAG "SRM-PE"
+#define TAG "OIC_SRM_PE"
 
 uint16_t GetPermissionFromCAMethod_t(const CAMethod_t method)
 {
@@ -47,10 +47,15 @@ uint16_t GetPermissionFromCAMethod_t(const CAMethod_t method)
         case CA_GET:
             perm = (uint16_t)PERMISSION_READ;
             break;
-        case CA_POST: // For now we treat all PUT & POST as Write
-        case CA_PUT:  // because we don't know if resource exists yet.
+        case CA_POST: // Treat all POST as Write (Update) because
+                      // we don't know if resource exists yet.
+                      // This will be addressed in IoTivity impl of OCF 1.0
             perm = (uint16_t)PERMISSION_WRITE;
             break;
+        case CA_PUT: // Per convention, OIC/OCF uses PUT only for Create,
+                     // never for Update.
+            perm = (uint16_t)PERMISSION_CREATE;
+            break;
         case CA_DELETE:
             perm = (uint16_t)PERMISSION_DELETE;
             break;
@@ -99,7 +104,6 @@ void SetPolicyEngineState(PEContext_t *context, const PEState_t state)
     memset(&context->subject, 0, sizeof(context->subject));
     memset(&context->resource, 0, sizeof(context->resource));
     context->permission = 0x0;
-    context->matchingAclFound = false;
     context->amsProcessing = false;
     context->retVal = ACCESS_DENIED_POLICY_ENGINE_ERROR;
 
@@ -147,6 +151,95 @@ static bool IsRequestFromDevOwner(PEContext_t *context)
     return retVal;
 }
 
+
+#ifdef MULTIPLE_OWNER
+/**
+ * Compare the request's subject to SubOwner.
+ *
+ * @return true if context->subjectId exist subowner list, else false.
+ */
+static bool IsRequestFromSubOwner(PEContext_t *context)
+{
+    bool retVal = false;
+
+    if(NULL == context)
+    {
+        return retVal;
+    }
+
+    if(IsSubOwner(&context->subject))
+    {
+        retVal = true;
+    }
+
+    if(true == retVal)
+    {
+        OIC_LOG(INFO, TAG, "PE.IsRequestFromSubOwner(): returning true");
+    }
+    else
+    {
+        OIC_LOG(INFO, TAG, "PE.IsRequestFromSubOwner(): returning false");
+    }
+
+    return retVal;
+}
+
+
+/**
+ * Verify the SubOwner's request.
+ *
+ * @return true if request is valid, else false.
+ */
+static bool IsValidRequestFromSubOwner(PEContext_t *context)
+{
+    bool isValidRequest = false;
+
+    if(NULL == context)
+    {
+        return isValidRequest;
+    }
+
+    switch(context->resourceType)
+    {
+        case OIC_R_DOXM_TYPE:
+            //SubOwner has READ permission only for DOXM
+            if(PERMISSION_READ == context->permission)
+            {
+                isValidRequest = true;
+            }
+            break;
+        case OIC_R_PSTAT_TYPE:
+            //SubOwner has full permsion for PSTAT
+            isValidRequest = true;
+            break;
+        case OIC_R_CRED_TYPE:
+            //SubOwner can only access the credential which is registered as the eowner.
+            isValidRequest = IsValidCredentialAccessForSubOwner(&context->subject, context->payload, context->payloadSize);
+            break;
+        case OIC_R_ACL_TYPE:
+            //SubOwner can only access the ACL which is registered as the eowner.
+            isValidRequest = IsValidAclAccessForSubOwner(&context->subject, context->payload, context->payloadSize);
+            break;
+        default:
+            //SubOwner has full permission for all resource except the security resource
+            isValidRequest = true;
+            break;
+    }
+
+    if(isValidRequest)
+    {
+        OIC_LOG(INFO, TAG, "PE.IsValidRequestFromSubOwner(): returning true");
+    }
+    else
+    {
+        OIC_LOG(INFO, TAG, "PE.IsValidRequestFromSubOwner(): returning false");
+    }
+
+    return isValidRequest;
+}
+#endif //MULTIPLE_OWNER
+
+
 // TODO - remove these function placeholders as they are implemented
 // in the resource entity handler code.
 // Note that because many SVRs do not have a rowner, in those cases we
@@ -392,12 +485,13 @@ static bool IsAccessWithinValidTime(const OicSecAce_t *ace)
  */
 static void ProcessAccessRequest(PEContext_t *context)
 {
-    OIC_LOG(DEBUG, TAG, "Entering ProcessAccessRequest()");
     if (NULL != context)
     {
         const OicSecAce_t *currentAce = NULL;
         OicSecAce_t *savePtr = NULL;
 
+        OIC_LOG_V(DEBUG, TAG, "Entering ProcessAccessRequest(%s)", context->resource);
+
         // Start out assuming subject not found.
         context->retVal = ACCESS_DENIED_SUBJECT_NOT_FOUND;
 
@@ -419,7 +513,6 @@ static void ProcessAccessRequest(PEContext_t *context)
                 if (IsResourceInAce(context->resource, currentAce))
                 {
                     OIC_LOG_V(INFO, TAG, "%s:found matching resource in ACE" ,__func__);
-                    context->matchingAclFound = true;
 
                     // Found the resource, so it's down to valid period & permission.
                     context->retVal = ACCESS_DENIED_INVALID_PERIOD;
@@ -437,7 +530,7 @@ static void ProcessAccessRequest(PEContext_t *context)
             {
                 OIC_LOG_V(INFO, TAG, "%s:no ACL found matching subject for resource %s",__func__, context->resource);
             }
-        } while ((NULL != currentAce) && (false == context->matchingAclFound));
+        } while ((NULL != currentAce) && (ACCESS_GRANTED != context->retVal));
 
         if (IsAccessGranted(context->retVal))
         {
@@ -476,17 +569,41 @@ SRMAccessResponse_t CheckPermission(PEContext_t     *context,
             CopyParamsToContext(context, subjectId, resource, requestedPermission);
         }
 
-        // Before doing any processing, check if request coming
-        // from DevOwner and if so, always GRANT.
-        if (IsRequestFromDevOwner(context))
+        // Before doing any ACL processing, check if request a) coming
+        // from DevOwner AND b) the device is in Ready for OTM or Reset state
+        // (which in IoTivity is equivalent to isOp == false && owned == false)
+        // AND c) the request is for a SVR resource.
+        // If all 3 conditions are met, grant request.
+        bool isDeviceOwned = true; // default to value that will not grant access
+        if (OC_STACK_OK != GetDoxmIsOwned(&isDeviceOwned)) // if runtime error, don't grant
+        {
+            context->retVal = ACCESS_DENIED_POLICY_ENGINE_ERROR;
+        }
+        // If we were able to get the value of doxm->isOwned, proceed with
+        // test for implicit access...
+        else if (IsRequestFromDevOwner(context) // if from DevOwner
+        && (GetPstatIsop() == false) // AND if pstat->isOp == false
+        && (isDeviceOwned == false) // AND if doxm->isOwned == false
+        && (context->resourceType != NOT_A_SVR_RESOURCE)) // AND if SVR type
         {
             context->retVal = ACCESS_GRANTED;
         }
-        // Then check if request is for a SVR and coming from rowner
+        // If not granted via DevOwner status and not a subowner,
+        // then check if request is for a SVR and coming from rowner
         else if (IsRequestFromResourceOwner(context))
         {
             context->retVal = ACCESS_GRANTED;
         }
+#ifdef MULTIPLE_OWNER
+        //Then check if request from SubOwner
+        else if(IsRequestFromSubOwner(context))
+        {
+            if(IsValidRequestFromSubOwner(context))
+            {
+                context->retVal = ACCESS_GRANTED;
+            }
+        }
+#endif //MULTIPLE_OWNER
         // Else request is a "normal" request that must be tested against ACL
         else
         {
@@ -495,8 +612,9 @@ SRMAccessResponse_t CheckPermission(PEContext_t     *context,
 
             ProcessAccessRequest(context);
 
-            // If matching ACL not found, and subject != wildcard, try wildcard.
-            if ((false == context->matchingAclFound) && \
+            // If access not already granted, and requested subject != wildcard,
+            // try looking for a wildcard ACE that grants access.
+            if ((ACCESS_GRANTED != context->retVal) && \
               (false == IsWildCardSubject(&context->subject)))
             {
                 //Saving subject for Amacl check