CredentialsManager.h

// -*- mode: c++; c-basic-offset:4 -*-
 
// This file is part of the BES
 
// Copyright (c) 2020 OPeNDAP, Inc.
// Author: Nathan Potter<ndp@opendap.org>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//
// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
// Created by ndp on 12/11/19.
//
 
#ifndef HYRAX_CREDENTIALSMANAGER_H
#define HYRAX_CREDENTIALSMANAGER_H
 
#include <memory>
#include <string>
#include <vector>
#include <mutex>
 
#include "url_impl.h"
#include "AccessCredentials.h"
 
// These are the names of the bes keys used to configure the handler.
#define CATALOG_MANAGER_CREDENTIALS "CredentialsManager.config"
 
namespace http {
 
class CredentialsManager {
public:
    static const char *ENV_ID_KEY;
    static const char *ENV_ACCESS_KEY;
    static const char *ENV_REGION_KEY;
    static const char *ENV_URL_KEY;
    static const char *USE_ENV_CREDS_KEY_VALUE;
 
private:
    std::recursive_mutex d_lock_mutex{};
 
    bool ngaps3CredentialsLoaded = false;
    std::map<std::string, AccessCredentials *> creds;
 
    CredentialsManager() = default;   // only called here to build the singleton
 
    // These are static because they must use C-linkage.
    static void initialize_instance();
    static void delete_instance();
 
    void load_credentials();
    AccessCredentials *load_credentials_from_env();
 
    friend class CredentialsManagerTest;
    friend class CurlUtilsTest;
 
public:
    static CredentialsManager *theMngr;
 
    ~CredentialsManager();
 
    static CredentialsManager *theCM();
 
    void add(const std::string &url, AccessCredentials *ac);
 
    void clear() {
        creds.clear();
        ngaps3CredentialsLoaded = false;
    }
 
    AccessCredentials *get(const std::shared_ptr<http::url> &url);
    AccessCredentials *get(const std::string &url);
 
    size_t size() const {
        return creds.size();
    }
 
    bool hasNgapS3Credentials() const {
        return ngaps3CredentialsLoaded;
    }
};
 
}   // namespace http
 
#endif //HYRAX_CREDENTIALSMANAGER_H