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/*
* ProFTPD - mod_sftp cipher mgmt
* Copyright (c) 2008-2011 TJ Saunders
*
* 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., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA.
*
* As a special exemption, TJ Saunders and other respective copyright holders
* give permission to link this program with OpenSSL, and distribute the
* resulting executable, without including the source code for OpenSSL in the
* source distribution.
*
* $Id: cipher.h,v 1.3 2011/05/23 20:40:13 castaglia Exp $
*/
#include "mod_sftp.h"
#ifndef MOD_SFTP_CIPHER_H
#define MOD_SFTP_CIPHER_H
/* Returns the cipher block size, or 8, whichever is larger. This value is
* used when reading in the first bytes of a packet in order to determine
* the packet length. See RFC4253, Section 6, "Binary Packet Protocol".
*/
size_t sftp_cipher_get_block_size(void);
void sftp_cipher_set_block_size(size_t);
const char *sftp_cipher_get_read_algo(void);
int sftp_cipher_set_read_algo(const char *);
int sftp_cipher_set_read_key(pool *, const EVP_MD *, const BIGNUM *,
const char *, uint32_t);
int sftp_cipher_read_data(pool *, unsigned char *, uint32_t, char **,
uint32_t *);
const char *sftp_cipher_get_write_algo(void);
int sftp_cipher_set_write_algo(const char *);
int sftp_cipher_set_write_key(pool *, const EVP_MD *, const BIGNUM *,
const char *, uint32_t);
int sftp_cipher_write_data(struct ssh2_packet *, char *, size_t *);
#endif
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