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 *
18 * The original Work has been changed by NXP.
19 *
20 * Licensed under the Apache License, Version 2.0 (the "License");
21 * you may not use this file except in compliance with the License.
22 * You may obtain a copy of the License at
23 *
24 * http://www.apache.org/licenses/LICENSE-2.0
25 *
26 * Unless required by applicable law or agreed to in writing, software
27 * distributed under the License is distributed on an "AS IS" BASIS,
28 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
29 * See the License for the specific language governing permissions and
30 * limitations under the License.
31 *
32 * Copyright 2023 NXP
33 *
34 ******************************************************************************/
35
36 #pragma once
37 #include <aidl/android/hardware/security/keymint/KeyParameter.h>
38 #include <aidl/android/hardware/security/keymint/Tag.h>
39 #include <aidl/android/hardware/security/keymint/HardwareAuthToken.h>
40 #include <aidl/android/hardware/security/secureclock/ISecureClock.h>
41 #include <keymaster/android_keymaster_messages.h>
42 #include <keymaster/android_keymaster_utils.h>
43 #include <vector>
44
45 namespace aidl::android::hardware::security::keymint::km_utils {
46 using keymaster::KeymasterBlob;
47 using ::ndk::ScopedAStatus;
48 using secureclock::TimeStampToken;
49 using std::vector;
50 using LegacyHardwareAuthToken = ::keymaster::HardwareAuthToken;
51
legacy_enum_conversion(const Tag value)52 inline keymaster_tag_t legacy_enum_conversion(const Tag value) {
53 return static_cast<keymaster_tag_t>(value);
54 }
55
legacy_enum_conversion(const keymaster_tag_t value)56 inline Tag legacy_enum_conversion(const keymaster_tag_t value) {
57 return static_cast<Tag>(value);
58 }
59
typeFromTag(const keymaster_tag_t tag)60 inline keymaster_tag_type_t typeFromTag(const keymaster_tag_t tag) {
61 return keymaster_tag_get_type(tag);
62 }
63
Vec2KmBlob(const vector<uint8_t> & input,KeymasterBlob * blob)64 inline void Vec2KmBlob(const vector<uint8_t>& input, KeymasterBlob* blob) {
65 blob->Reset(input.size());
66 memcpy(blob->writable_data(), input.data(), input.size());
67 }
68
kmBlob2vector(const keymaster_key_blob_t & blob)69 inline vector<uint8_t> kmBlob2vector(const keymaster_key_blob_t& blob) {
70 vector<uint8_t> result(blob.key_material, blob.key_material + blob.key_material_size);
71 return result;
72 }
73
kmBlob2vector(const keymaster_blob_t & blob)74 inline vector<uint8_t> kmBlob2vector(const keymaster_blob_t& blob) {
75 vector<uint8_t> result(blob.data, blob.data + blob.data_length);
76 return result;
77 }
78
79 keymaster_error_t legacyHardwareAuthToken(const HardwareAuthToken& aidlToken,
80 LegacyHardwareAuthToken* legacyToken);
81
82 keymaster_error_t encodeTimestampToken(const TimeStampToken& timestampToken,
83 vector<uint8_t>* encodedToken);
84
kmError2ScopedAStatus(const keymaster_error_t value)85 inline ScopedAStatus kmError2ScopedAStatus(const keymaster_error_t value) {
86 return (value == KM_ERROR_OK
87 ? ScopedAStatus::ok()
88 : ScopedAStatus(AStatus_fromServiceSpecificError(static_cast<int32_t>(value))));
89 }
90
91 KeyParameter kmParam2Aidl(const keymaster_key_param_t& param);
92 vector<KeyParameter> kmParamSet2Aidl(const keymaster_key_param_set_t& set);
93 keymaster_key_param_set_t aidlKeyParams2Km(const vector<KeyParameter>& keyParams);
94
95 class KmParamSet : public keymaster_key_param_set_t {
96 public:
KmParamSet(const vector<KeyParameter> & keyParams)97 explicit KmParamSet(const vector<KeyParameter>& keyParams)
98 : keymaster_key_param_set_t(aidlKeyParams2Km(keyParams)) {}
99
KmParamSet(KmParamSet && other)100 KmParamSet(KmParamSet&& other) : keymaster_key_param_set_t{other.params, other.length} {
101 other.length = 0;
102 other.params = nullptr;
103 }
104
105 KmParamSet(const KmParamSet&) = delete;
~KmParamSet()106 ~KmParamSet() { keymaster_free_param_set(this); }
107 };
108
109 } // namespace aidl::android::hardware::security::keymint
110