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
encode_field_id(const Privacy * p)26 uint64_t encode_field_id(const Privacy* p) { return (uint64_t)p->type << 32 | p->field_id; }
27
lookup(const Privacy * p,uint32_t fieldId)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
allowDest(const uint8_t dest,const uint8_t policy)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
operator <(const PrivacySpec & other) const53 bool PrivacySpec::operator<(const PrivacySpec& other) const { return dest < other.dest; }
54
CheckPremission(const Privacy * privacy,const uint8_t defaultDest) const55 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
RequireAll() const60 bool PrivacySpec::RequireAll() const { return dest == android::os::DEST_LOCAL; }
61
new_spec(int dest)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