1 /*
2 * Copyright (C) 2012 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 <android/security/keystore/IKeystoreService.h>
18 #include <binder/IServiceManager.h>
19
20 #include <keystore/keystore_get.h>
21 #include <vector>
22
23 using namespace android;
24 using namespace keystore;
25
keystore_get(const char * key,size_t keyLength,uint8_t ** value)26 ssize_t keystore_get(const char* key, size_t keyLength, uint8_t** value) {
27 sp<IServiceManager> sm = defaultServiceManager();
28 sp<IBinder> binder = sm->getService(String16("android.security.keystore"));
29 sp<android::security::keystore::IKeystoreService> service =
30 interface_cast<android::security::keystore::IKeystoreService>(binder);
31
32 if (service == nullptr) {
33 return -1;
34 }
35
36 ::std::vector<uint8_t> result;
37 auto ret = service->get(String16(key, keyLength), -1, &result);
38 if (!ret.isOk()) return -1;
39
40 if (value) {
41 *value = reinterpret_cast<uint8_t*>(malloc(result.size()));
42 if (!*value) return -1;
43 memcpy(*value, &result[0], result.size());
44 }
45 return result.size();
46 }
47