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/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <functional>
#include <string>
#include <vector>
#include <android-base/result.h>
// Information extracted from a certificate.
struct CertInfo {
std::string subjectCn;
std::vector<uint8_t> subjectRsaPublicKey;
};
// Subjects of certificates we issue.
struct CertSubject {
const char* commonName;
unsigned serialNumber;
};
// These are all the certificates we ever sign (the first one being our
// self-signed cert). We shouldn't really re-use serial numbers for different
// certificates for the same subject but we do; only one should be in use at a
// time though.
inline const CertSubject kRootSubject{"ODS", 1};
inline const CertSubject kCompOsSubject{"CompOs", 2};
android::base::Result<void> createSelfSignedCertificate(
const std::vector<uint8_t>& publicKey,
const std::function<android::base::Result<std::string>(const std::string&)>& signFunction,
const std::string& path);
android::base::Result<void> createLeafCertificate(
const CertSubject& subject, const std::vector<uint8_t>& publicKey,
const std::function<android::base::Result<std::string>(const std::string&)>& signFunction,
const std::string& issuerCertPath, const std::string& outPath);
android::base::Result<std::vector<uint8_t>> createPkcs7(const std::vector<uint8_t>& signedData,
const CertSubject& signer);
android::base::Result<std::vector<uint8_t>>
extractPublicKeyFromX509(const std::vector<uint8_t>& x509);
android::base::Result<std::vector<uint8_t>>
extractPublicKeyFromSubjectPublicKeyInfo(const std::vector<uint8_t>& subjectKeyInfo);
android::base::Result<std::vector<uint8_t>> extractPublicKeyFromX509(const std::string& path);
android::base::Result<CertInfo>
verifyAndExtractCertInfoFromX509(const std::string& path, const std::vector<uint8_t>& publicKey);
android::base::Result<void> verifySignature(const std::string& message,
const std::string& signature,
const std::vector<uint8_t>& publicKey);
android::base::Result<void> verifyRsaPublicKeySignature(const std::string& message,
const std::string& signature,
const std::vector<uint8_t>& rsaPublicKey);
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