/*
    cipher.h -- header file cipher.c
    Copyright (C) 2007-2013 Guus Sliepen <guus@tinc-vpn.org>

    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, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#ifndef __TINC_CIPHER_H__
#define __TINC_CIPHER_H__

#define CIPHER_MAX_BLOCK_SIZE 32
#define CIPHER_MAX_IV_SIZE 16
#define CIPHER_MAX_KEY_SIZE 32

#ifndef DISABLE_LEGACY

typedef struct cipher cipher_t;

extern cipher_t *cipher_open_by_name(const char *) __attribute__ ((__malloc__));
extern cipher_t *cipher_open_by_nid(int) __attribute__ ((__malloc__));
extern cipher_t *cipher_open_blowfish_ofb(void) __attribute__ ((__malloc__));
extern void cipher_close(cipher_t *);
extern size_t cipher_keylength(const cipher_t *);
extern size_t cipher_blocksize(const cipher_t *);
extern void cipher_get_key(const cipher_t *, void *);
extern bool cipher_set_key(cipher_t *, void *, bool) __attribute__ ((__warn_unused_result__));
extern bool cipher_set_key_from_rsa(cipher_t *, void *, size_t, bool) __attribute__ ((__warn_unused_result__));
extern bool cipher_encrypt(cipher_t *, const void *indata, size_t inlen, void *outdata, size_t *outlen, bool oneshot) __attribute__ ((__warn_unused_result__));
extern bool cipher_decrypt(cipher_t *, const void *indata, size_t inlen, void *outdata, size_t *outlen, bool oneshot) __attribute__ ((__warn_unused_result__));
extern int cipher_get_nid(const cipher_t *);
extern bool cipher_active(const cipher_t *);

#endif

#endif