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/*
* rsyncrypto - an rsync friendly encryption
* Copyright (C) 2005 Shachar Shemesh for Lingnu Open Source Consulting ltd.
*
* This program 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.
*
* 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
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* In addition, as a special exception, the rsyncrypto authors give permission
* to link the code of this program with the OpenSSL library (or with modified
* versions of OpenSSL that use the same license as OpenSSL), and distribute
* linked combinations including the two. You must obey the GNU General Public
* License in all respects for all of the code used other than OpenSSL. If you
* modify this file, you may extend this exception to your version of the file,
* but you are not obligated to do so. If you do not wish to do so, delete this
* exception statement from your version.
*
* The project's homepage is at http://rsyncrypto.lingnu.com
*/
#ifndef CRYPTO_H
#define CRYPTO_H
#include <openssl/rsa.h>
#include "crypt_key.h"
#include "bufferfd.h"
enum CYPHER_TYPE { CYPHER_AES };
//class key_header;
//struct key_header *gen_header(int key_length, enum CYPHER_TYPE cypher);
std::unique_ptr<key> read_header( const autofd &headfd );
void write_header( const char *filename, const key *head );
size_t header_size( const RSA *rsa );
void encrypt_header( const struct key_header *header, RSA *rsa, unsigned char *to );
RSA *extract_public_key( const char *pem_filename );
RSA *extract_private_key( const char *key_filename );
void encrypt_file( key *header, RSA *rsa, read_bufferfd &fromfd, write_bufferfd &tofd );
std::unique_ptr<key> decrypt_file( std::unique_ptr<key> header, RSA *prv, read_bufferfd &fromfd, write_bufferfd &tofd );
#endif /* CRYPTO_H */
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