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 <functional>
20 #include <string>
21 #include <vector>
22 
23 #include <android-base/result.h>
24 
25 // Information extracted from a certificate.
26 struct CertInfo {
27     std::string subjectCn;
28     std::vector<uint8_t> subjectRsaPublicKey;
29 };
30 
31 // Subjects of certificates we issue.
32 struct CertSubject {
33     const char* commonName;
34     unsigned serialNumber;
35 };
36 
37 // This is our self-signed cert.
38 inline const CertSubject kRootSubject{"ODS", 1};
39 
40 android::base::Result<void> createSelfSignedCertificate(
41     const std::vector<uint8_t>& publicKey,
42     const std::function<android::base::Result<std::string>(const std::string&)>& signFunction,
43     const std::string& path);
44 
45 android::base::Result<std::vector<uint8_t>>
46 extractPublicKeyFromX509(const std::vector<uint8_t>& x509);
47 android::base::Result<std::vector<uint8_t>> extractPublicKeyFromX509(const std::string& path);
48 
49 android::base::Result<void> verifySignature(const std::string& message,
50                                             const std::string& signature,
51                                             const std::vector<uint8_t>& publicKey);
52