1 /*
2 * Copyright (C) 2018 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 #ifndef HARDWARE_INTERFACES_KEYMASTER_40_SUPPORT_KEYMASTER_UTILS_H_
18 #define HARDWARE_INTERFACES_KEYMASTER_40_SUPPORT_KEYMASTER_UTILS_H_
19
20 #include <android/hardware/keymaster/4.0/types.h>
21 #include <optional>
22 #include <vector>
23
24 namespace android {
25 namespace hardware {
26 namespace keymaster {
27 namespace V4_0 {
28
29 /**
30 * Define a lexicographical ordering on HmacSharingParameters. The parameters to
31 * IKeymasterDevice::computeSharedHmac are required to be delivered in the order specified by this
32 * comparison operator.
33 */
34 bool operator<(const HmacSharingParameters& a, const HmacSharingParameters& b);
35
36 namespace support {
37
blob2hidlVec(const uint8_t * data,const size_t length)38 inline static hidl_vec<uint8_t> blob2hidlVec(const uint8_t* data, const size_t length) {
39 hidl_vec<uint8_t> result(data, data + length);
40 return result;
41 }
42
blob2hidlVec(const std::string & value)43 inline static hidl_vec<uint8_t> blob2hidlVec(const std::string& value) {
44 hidl_vec<uint8_t> result(reinterpret_cast<const uint8_t*>(value.data()),
45 reinterpret_cast<const uint8_t*>(value.data()) + value.size());
46 return result;
47 }
48
blob2hidlVec(const std::vector<uint8_t> & blob)49 inline static hidl_vec<uint8_t> blob2hidlVec(const std::vector<uint8_t>& blob) {
50 hidl_vec<uint8_t> result(blob.data(), blob.data() + static_cast<size_t>(blob.size()));
51 return result;
52 }
53
54 HardwareAuthToken hidlVec2AuthToken(const hidl_vec<uint8_t>& buffer);
55 hidl_vec<uint8_t> authToken2HidlVec(const HardwareAuthToken& token);
56
57 // Serializes and deserializes a verification token. This format is private and
58 // not stable between releases and should not be persisted to disk.
59 //
60 // Currently doesn't support the |parametersVerified| field, will fail if set.
61 //
62 std::optional<VerificationToken> deserializeVerificationToken(
63 const std::vector<uint8_t>& serializedToken);
64 std::optional<std::vector<uint8_t>> serializeVerificationToken(const VerificationToken& token);
65
66 uint32_t getOsVersion();
67 uint32_t getOsPatchlevel();
68
69 } // namespace support
70 } // namespace V4_0
71 } // namespace keymaster
72 } // namespace hardware
73 } // namespace android
74
75 #endif // HARDWARE_INTERFACES_KEYMASTER_40_SUPPORT_KEYMASTER_UTILS_H_
76