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