1 // 2 // Copyright (C) 2019 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 #pragma once 17 18 #include <chrono> 19 #include <memory> 20 21 #include "curl_wrapper.h" 22 23 class CredentialSource { 24 public: 25 virtual ~CredentialSource() = default; 26 virtual std::string Credential() = 0; 27 }; 28 29 class GceMetadataCredentialSource : public CredentialSource { 30 CurlWrapper curl; 31 std::string latest_credential; 32 std::chrono::steady_clock::time_point expiration; 33 34 void RefreshCredential(); 35 public: 36 GceMetadataCredentialSource(); 37 GceMetadataCredentialSource(GceMetadataCredentialSource&&) = default; 38 39 virtual std::string Credential(); 40 41 static std::unique_ptr<CredentialSource> make(); 42 }; 43 44 class FixedCredentialSource : public CredentialSource { 45 std::string credential; 46 public: 47 FixedCredentialSource(const std::string& credential); 48 49 virtual std::string Credential(); 50 51 static std::unique_ptr<CredentialSource> make(const std::string& credential); 52 }; 53