1 /*
2 * Copyright (C) 2020 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 #pragma once
18
19 #include <vector>
20
21 #include <aidl/android/hardware/security/keymint/HardwareAuthToken.h>
22 #include <aidl/android/hardware/security/keymint/KeyParameter.h>
23 #include <aidl/android/hardware/security/keymint/Tag.h>
24 #include <aidl/android/hardware/security/secureclock/ISecureClock.h>
25
26 #include <keymaster/android_keymaster_messages.h>
27 #include <keymaster/android_keymaster_utils.h>
28
29 namespace aidl::android::hardware::security::keymint::km_utils {
30 using namespace ::keymaster;
31 using ::ndk::ScopedAStatus;
32 using secureclock::TimeStampToken;
33 using std::vector;
34 using LegacyHardwareAuthToken = ::keymaster::HardwareAuthToken;
35
legacy_enum_conversion(const Tag value)36 inline keymaster_tag_t legacy_enum_conversion(const Tag value) {
37 return static_cast<keymaster_tag_t>(value);
38 }
39
legacy_enum_conversion(const keymaster_tag_t value)40 inline Tag legacy_enum_conversion(const keymaster_tag_t value) {
41 return static_cast<Tag>(value);
42 }
43
typeFromTag(const keymaster_tag_t tag)44 inline keymaster_tag_type_t typeFromTag(const keymaster_tag_t tag) {
45 return keymaster_tag_get_type(tag);
46 }
47
Vec2KmBlob(const vector<uint8_t> & input,KeymasterBlob * blob)48 inline void Vec2KmBlob(const vector<uint8_t>& input, KeymasterBlob* blob) {
49 blob->Reset(input.size());
50 memcpy(blob->writable_data(), input.data(), input.size());
51 }
52
kmBlob2vector(const keymaster_key_blob_t & blob)53 inline vector<uint8_t> kmBlob2vector(const keymaster_key_blob_t& blob) {
54 vector<uint8_t> result(blob.key_material, blob.key_material + blob.key_material_size);
55 return result;
56 }
57
kmBlob2vector(const keymaster_blob_t & blob)58 inline vector<uint8_t> kmBlob2vector(const keymaster_blob_t& blob) {
59 vector<uint8_t> result(blob.data, blob.data + blob.data_length);
60 return result;
61 }
62
63 keymaster_error_t legacyHardwareAuthToken(const HardwareAuthToken& aidlToken,
64 LegacyHardwareAuthToken* legacyToken);
65
66 keymaster_error_t encodeTimestampToken(const TimeStampToken& timestampToken,
67 vector<uint8_t>* encodedToken);
68
kmError2ScopedAStatus(const keymaster_error_t value)69 inline ScopedAStatus kmError2ScopedAStatus(const keymaster_error_t value) {
70 return (value == KM_ERROR_OK
71 ? ScopedAStatus::ok()
72 : ScopedAStatus(AStatus_fromServiceSpecificError(static_cast<int32_t>(value))));
73 }
74
75 KeyParameter kmParam2Aidl(const keymaster_key_param_t& param);
76 vector<KeyParameter> kmParamSet2Aidl(const keymaster_key_param_set_t& set);
77 keymaster_key_param_set_t aidlKeyParams2Km(const vector<KeyParameter>& keyParams);
78
79 class KmParamSet : public keymaster_key_param_set_t {
80 public:
KmParamSet(const vector<KeyParameter> & keyParams)81 explicit KmParamSet(const vector<KeyParameter>& keyParams)
82 : keymaster_key_param_set_t(aidlKeyParams2Km(keyParams)) {}
83
KmParamSet(KmParamSet && other)84 KmParamSet(KmParamSet&& other) : keymaster_key_param_set_t{other.params, other.length} {
85 other.length = 0;
86 other.params = nullptr;
87 }
88
89 KmParamSet(const KmParamSet&) = delete;
~KmParamSet()90 ~KmParamSet() { keymaster_free_param_set(this); }
91 };
92
93 } // namespace aidl::android::hardware::security::keymint::km_utils
94