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
22namespace android {
23namespace os {
24namespace incidentd {
25
26uint64_t encode_field_id(const Privacy* p) { return (uint64_t)p->type << 32 | p->field_id; }
27
28const 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
38static 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
53bool PrivacySpec::operator<(const PrivacySpec& other) const { return dest < other.dest; }
54
55bool 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
60bool PrivacySpec::RequireAll() const { return dest == android::os::DEST_LOCAL; }
61
62PrivacySpec 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