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/*
* Copyright (C) 2019 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*
* Wsrep-lib is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* Wsrep-lib 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with wsrep-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef WSREP_ENCRYPTION_SERVICE_HPP
#define WSREP_ENCRYPTION_SERVICE_HPP
#include "buffer.hpp"
namespace wsrep
{
/**
* Encryption service.
*/
class encryption_service
{
public:
virtual ~encryption_service() { }
/**
* Encryption/decryption callback. Can be NULL for no encryption.
*
* @param ctx Encryption context
* @param key Key used in encryption/decryption
* @param iv IV vector
* @param input Input data buffer
* @param output An output buffer, must be at least the size of the input
* data plus unwritten bytes from the previous call(s).
* @param encrypt Flag used to either encrypt or decrypt data
* @param last true if this is the last buffer to encrypt/decrypt
*
* @return Number of bytes written to output or a negative error code.
*/
virtual int do_crypt(void** ctx,
wsrep::const_buffer& key,
const char (*iv)[32],
wsrep::const_buffer& input,
void* output,
bool encrypt,
bool last) = 0;
/**
* Is encryption enabled on server.
*
* @return True if encryption is enabled. False otherwise
*/
virtual bool encryption_enabled() = 0;
};
}
#endif // WSREP_ENCRYPTION_SERVICE_HPP
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