1 /*
2 * Copyright (C) 2023 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 "guest/hals/oemlock/remote/remote_oemlock.h"
18
19 #include <android-base/logging.h>
20
21 namespace aidl {
22 namespace android {
23 namespace hardware {
24 namespace oemlock {
25 namespace {
26
27 enum {
28 CUSTOM_ERROR_TRANSPORT_IS_FAILED = 0,
29 };
30
resultToStatus(Result<void> r)31 ::ndk::ScopedAStatus resultToStatus(Result<void> r) {
32 if (r.ok()) {
33 return ::ndk::ScopedAStatus::ok();
34 } else {
35 return ::ndk::ScopedAStatus::fromServiceSpecificErrorWithMessage(
36 CUSTOM_ERROR_TRANSPORT_IS_FAILED, r.error().Message().c_str());
37 }
38 }
39
40 }
41
OemLock(transport::Channel & channel)42 OemLock::OemLock(transport::Channel& channel) : channel_(channel) {}
43
getName(std::string * out_name)44 ::ndk::ScopedAStatus OemLock::getName(std::string *out_name) {
45 *out_name = "CF Remote Implementation";
46 return ::ndk::ScopedAStatus::ok();
47 }
48
setOemUnlockAllowedByCarrier(bool in_allowed,const std::vector<uint8_t> &,OemLockSecureStatus * _aidl_return)49 ::ndk::ScopedAStatus OemLock::setOemUnlockAllowedByCarrier(bool in_allowed,
50 const std::vector<uint8_t> &,
51 OemLockSecureStatus *_aidl_return) {
52 *_aidl_return = OemLockSecureStatus::OK;
53 return resultToStatus(setValue(secure_env::OemLockField::ALLOWED_BY_CARRIER, in_allowed));
54 }
55
isOemUnlockAllowedByCarrier(bool * out_allowed)56 ::ndk::ScopedAStatus OemLock::isOemUnlockAllowedByCarrier(bool *out_allowed) {
57 return resultToStatus(requestValue(secure_env::OemLockField::ALLOWED_BY_CARRIER, out_allowed));
58 }
59
setOemUnlockAllowedByDevice(bool in_allowed)60 ::ndk::ScopedAStatus OemLock::setOemUnlockAllowedByDevice(bool in_allowed) {
61 return resultToStatus(setValue(secure_env::OemLockField::ALLOWED_BY_DEVICE, in_allowed));
62 }
63
isOemUnlockAllowedByDevice(bool * out_allowed)64 ::ndk::ScopedAStatus OemLock::isOemUnlockAllowedByDevice(bool *out_allowed) {
65 return resultToStatus(requestValue(secure_env::OemLockField::ALLOWED_BY_DEVICE, out_allowed));
66 }
67
requestValue(secure_env::OemLockField field,bool * out)68 Result<void> OemLock::requestValue(secure_env::OemLockField field, bool *out) {
69 auto message = CF_EXPECT(transport::CreateMessage(static_cast<uint32_t>(field), 0),
70 "Cannot allocate message for oemlock request: " <<
71 static_cast<uint32_t>(field));
72 CF_EXPECT(channel_.SendRequest(*message),
73 "Can't send get value request for field: " << static_cast<uint32_t>(field));
74 auto response = CF_EXPECT(channel_.ReceiveMessage(),
75 "Haven't received an answer for getting the field: " <<
76 static_cast<uint32_t>(field));
77 *out = *reinterpret_cast<bool*>(response->payload);
78 return {};
79 }
80
setValue(secure_env::OemLockField field,bool value)81 Result<void> OemLock::setValue(secure_env::OemLockField field, bool value) {
82 auto message = CF_EXPECT(transport::CreateMessage(static_cast<uint32_t>(field), sizeof(bool)),
83 "Cannot allocate message for oemlock request: " <<
84 static_cast<uint32_t>(field));
85 memcpy(message->payload, &value, sizeof(bool));
86 CF_EXPECT(channel_.SendRequest(*message),
87 "Can't send set value request for field: " << static_cast<uint32_t>(field));
88 auto response = CF_EXPECT(channel_.ReceiveMessage(),
89 "Haven't received an answer for setting the field: " <<
90 static_cast<uint32_t>(field));
91 auto updated_value = *reinterpret_cast<bool*>(response->payload);
92 CF_EXPECT(value == updated_value,
93 "Updated value for the field " << static_cast<uint32_t>(field) <<
94 " is different from what we wated to set");
95 return {};
96 }
97
98 } // namespace oemlock
99 } // namespace hardware
100 } // namespace android
101 } // aidl
102