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 #include <strstream>
22
23
24 namespace android {
25 namespace os {
26 namespace incidentd {
27
28 using namespace android::os;
29 using std::strstream;
30
encode_field_id(const Privacy * p)31 uint64_t encode_field_id(const Privacy* p) { return (uint64_t)p->type << 32 | p->field_id; }
32
toString() const33 string Privacy::toString() const {
34 if (this == NULL) {
35 return "Privacy{null}";
36 }
37 strstream os;
38 os << "Privacy{field_id=" << field_id << " type=" << ((int)type)
39 << " children=" << ((void*)children) << " policy=" << ((int)policy) << "}";
40 return os.str();
41 }
42
lookup(const Privacy * p,uint32_t fieldId)43 const Privacy* lookup(const Privacy* p, uint32_t fieldId) {
44 if (p->children == NULL) return NULL;
45 for (int i = 0; p->children[i] != NULL; i++) { // NULL-terminated.
46 if (p->children[i]->field_id == fieldId) return p->children[i];
47 // Incident section gen tool guarantees field ids in ascending order.
48 if (p->children[i]->field_id > fieldId) return NULL;
49 }
50 return NULL;
51 }
52
isAllowed(const uint8_t policy,const uint8_t check)53 static bool isAllowed(const uint8_t policy, const uint8_t check) {
54 switch (check) {
55 case PRIVACY_POLICY_LOCAL:
56 return policy == PRIVACY_POLICY_LOCAL;
57 case PRIVACY_POLICY_EXPLICIT:
58 case PRIVACY_POLICY_UNSET:
59 return policy == PRIVACY_POLICY_LOCAL
60 || policy == PRIVACY_POLICY_EXPLICIT
61 || policy == PRIVACY_POLICY_UNSET;
62 case PRIVACY_POLICY_AUTOMATIC:
63 return true;
64 default:
65 return false;
66 }
67 }
68
PrivacySpec(uint8_t argPolicy)69 PrivacySpec::PrivacySpec(uint8_t argPolicy) {
70 // TODO: Why on earth do we have two definitions of policy. Maybe
71 // it's not too late to clean this up.
72 switch (argPolicy) {
73 case android::os::PRIVACY_POLICY_AUTOMATIC:
74 case android::os::PRIVACY_POLICY_EXPLICIT:
75 case android::os::PRIVACY_POLICY_LOCAL:
76 mPolicy = argPolicy;
77 break;
78 default:
79 mPolicy = android::os::PRIVACY_POLICY_AUTOMATIC;
80 break;
81 }
82 }
83
operator <(const PrivacySpec & that) const84 bool PrivacySpec::operator<(const PrivacySpec& that) const {
85 return mPolicy < that.mPolicy;
86 }
87
CheckPremission(const Privacy * privacy,const uint8_t defaultDest) const88 bool PrivacySpec::CheckPremission(const Privacy* privacy, const uint8_t defaultDest) const {
89 uint8_t check = privacy != NULL ? privacy->policy : defaultDest;
90 return isAllowed(mPolicy, check);
91 }
92
RequireAll() const93 bool PrivacySpec::RequireAll() const {
94 return mPolicy == android::os::PRIVACY_POLICY_LOCAL;
95 }
96
cleanup_privacy_policy(uint8_t policy)97 uint8_t cleanup_privacy_policy(uint8_t policy) {
98 if (policy >= PRIVACY_POLICY_AUTOMATIC) {
99 return PRIVACY_POLICY_AUTOMATIC;
100 }
101 if (policy >= PRIVACY_POLICY_EXPLICIT) {
102 return PRIVACY_POLICY_EXPLICIT;
103 }
104 return PRIVACY_POLICY_LOCAL;
105 }
106
107 } // namespace incidentd
108 } // namespace os
109 } // namespace android
110