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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include "Privacy.h"
     18 
     19 #include <android/os/IncidentReportArgs.h>
     20 #include <stdlib.h>
     21 
     22 namespace android {
     23 namespace os {
     24 namespace incidentd {
     25 
     26 uint64_t encode_field_id(const Privacy* p) { return (uint64_t)p->type << 32 | p->field_id; }
     27 
     28 const Privacy* lookup(const Privacy* p, uint32_t fieldId) {
     29     if (p->children == NULL) return NULL;
     30     for (int i = 0; p->children[i] != NULL; i++) {  // NULL-terminated.
     31         if (p->children[i]->field_id == fieldId) return p->children[i];
     32         // Incident section gen tool guarantees field ids in ascending order.
     33         if (p->children[i]->field_id > fieldId) return NULL;
     34     }
     35     return NULL;
     36 }
     37 
     38 static bool allowDest(const uint8_t dest, const uint8_t policy) {
     39     switch (policy) {
     40         case android::os::DEST_LOCAL:
     41             return dest == android::os::DEST_LOCAL;
     42         case android::os::DEST_EXPLICIT:
     43         case DEST_UNSET:
     44             return dest == android::os::DEST_LOCAL || dest == android::os::DEST_EXPLICIT ||
     45                    dest == DEST_UNSET;
     46         case android::os::DEST_AUTOMATIC:
     47             return true;
     48         default:
     49             return false;
     50     }
     51 }
     52 
     53 bool PrivacySpec::operator<(const PrivacySpec& other) const { return dest < other.dest; }
     54 
     55 bool PrivacySpec::CheckPremission(const Privacy* privacy, const uint8_t defaultDest) const {
     56     uint8_t policy = privacy != NULL ? privacy->dest : defaultDest;
     57     return allowDest(dest, policy);
     58 }
     59 
     60 bool PrivacySpec::RequireAll() const { return dest == android::os::DEST_LOCAL; }
     61 
     62 PrivacySpec PrivacySpec::new_spec(int dest) {
     63     switch (dest) {
     64         case android::os::DEST_AUTOMATIC:
     65         case android::os::DEST_EXPLICIT:
     66         case android::os::DEST_LOCAL:
     67             return PrivacySpec(dest);
     68         default:
     69             return PrivacySpec(android::os::DEST_AUTOMATIC);
     70     }
     71 }
     72 
     73 }  // namespace incidentd
     74 }  // namespace os
     75 }  // namespace android
     76