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/**
* Copyright (C) 2020-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include <string>
#include "mongo/util/kms_message_support.h"
#include "mongo/util/net/sock.h"
#include "mongo/util/net/ssl_manager.h"
#include "mongo/util/net/ssl_options.h"
#include "mongo/util/time_support.h"
namespace mongo {
/**
* Make a request to an HTTP endpoint.
*
* Does not maintain a persistent HTTP connection.
*/
class KMSNetworkConnection {
public:
static constexpr double so_timeout_seconds = 10;
KMSNetworkConnection(SSLManagerInterface* ssl)
: _sslManager(ssl),
_socket(std::make_unique<Socket>(so_timeout_seconds, logv2::LogSeverity::Info())) {}
UniqueKmsResponse makeOneRequest(const HostAndPort& host, ConstDataRange request);
private:
UniqueKmsResponse sendRequest(ConstDataRange request);
void connect(const HostAndPort& host);
private:
// SSL Manager for connections
SSLManagerInterface* _sslManager;
// Synchronous socket
std::unique_ptr<Socket> _socket;
};
/**
* Creates an initial SSLParams object for KMS over the network.
*/
void getSSLParamsForNetworkKMS(SSLParams*);
/**
* Converts a base64 encoded KMS response to a vector of bytes.
*/
std::vector<uint8_t> kmsResponseToVector(StringData str);
/**
* Converts a base64 encoded KMS response to a securely allocated vector of bytes.
*/
SecureVector<uint8_t> kmsResponseToSecureVector(StringData str);
/**
* Base class for KMS services that use OAuth for authorization.
*
* Each service only talks to one OAuth endpoint so caching bearer tokens is simple.
*/
class KMSOAuthService {
public:
KMSOAuthService(HostAndPort oAuthEndpoint, std::shared_ptr<SSLManagerInterface> sslManager)
: _oAuthEndpoint(oAuthEndpoint), _sslManager(sslManager) {}
/**
* Get a bearer token to use to make requests. It may be cached.
*/
StringData getBearerToken();
protected:
/**
* Construct a valid kms request for retrieving a new OAuth Bearer token
*/
virtual UniqueKmsRequest getOAuthRequest() = 0;
protected:
// OAuth Service endpoint
HostAndPort _oAuthEndpoint;
private:
/**
* Make a TLS request to a service to fetch a bearer token.
*/
void makeBearerTokenRequest();
private:
// SSL Manager
std::shared_ptr<SSLManagerInterface> _sslManager;
// Cached access token
std::string _cachedToken;
// Expiration datetime of access token
Date_t _expirationDateTime;
};
} // namespace mongo
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