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 #include "aaid.hpp"
18
19 #include <keystore/keystore_attestation_id.h>
20
21 using android::security::gather_attestation_application_id;
22
aaid_keystore_attestation_id(uint32_t uid,uint8_t * aaid,size_t * aaid_size)23 uint32_t aaid_keystore_attestation_id(uint32_t uid, uint8_t* aaid, size_t* aaid_size) {
24 static_assert(sizeof(uint32_t) == sizeof(uid_t), "uid_t has unexpected size");
25 static_assert(sizeof(uint32_t) == sizeof(android::status_t), "status_t has unexpected size");
26 static_assert(KEY_ATTESTATION_APPLICATION_ID_MAX_SIZE ==
27 android::security::KEY_ATTESTATION_APPLICATION_ID_MAX_SIZE,
28 "KEY_ATTESTATION_APPLICATION_ID_MAX_SIZE sizes don't match.");
29 auto result = gather_attestation_application_id(uid);
30 if (!result.isOk()) {
31 return result.status();
32 }
33 if (result.value().size() > KEY_ATTESTATION_APPLICATION_ID_MAX_SIZE) {
34 return ::android::NO_MEMORY;
35 }
36 if (*aaid_size != KEY_ATTESTATION_APPLICATION_ID_MAX_SIZE) {
37 return ::android::BAD_VALUE;
38 }
39 std::copy(result.value().begin(), result.value().end(), aaid);
40 *aaid_size = result.value().size();
41 return ::android::OK;
42 }
43