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/* $OpenBSD: cipher.h,v 1.56 2023/10/10 06:49:54 tb Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
* All rights reserved
*
* As far as I am concerned, the code I have written for this software
* can be used freely for any purpose. Any derived versions of this
* software must be clearly marked as such, and if the derived work is
* incompatible with the protocol description in the RFC file, it must be
* called by a name other than "ssh" or "Secure Shell".
*
* Copyright (c) 2000 Markus Friedl. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef CIPHER_H
#define CIPHER_H
#include <sys/types.h>
#ifdef WITH_OPENSSL
#include <openssl/evp.h>
#endif
#include "cipher-chachapoly.h"
#include "cipher-aesctr.h"
#define CIPHER_ENCRYPT 1
#define CIPHER_DECRYPT 0
struct sshcipher;
struct sshcipher_ctx;
const struct sshcipher *cipher_by_name(const char *);
const char *cipher_warning_message(const struct sshcipher_ctx *);
int ciphers_valid(const char *);
char *cipher_alg_list(char, int);
const char *compression_alg_list(int);
int cipher_init(struct sshcipher_ctx **, const struct sshcipher *,
const u_char *, u_int, const u_char *, u_int, int);
int cipher_crypt(struct sshcipher_ctx *, u_int, u_char *, const u_char *,
u_int, u_int, u_int);
int cipher_get_length(struct sshcipher_ctx *, u_int *, u_int,
const u_char *, u_int);
void cipher_free(struct sshcipher_ctx *);
u_int cipher_blocksize(const struct sshcipher *);
u_int cipher_keylen(const struct sshcipher *);
u_int cipher_seclen(const struct sshcipher *);
u_int cipher_authlen(const struct sshcipher *);
u_int cipher_ivlen(const struct sshcipher *);
u_int cipher_is_cbc(const struct sshcipher *);
u_int cipher_ctx_is_plaintext(struct sshcipher_ctx *);
int cipher_get_keyiv(struct sshcipher_ctx *, u_char *, size_t);
int cipher_set_keyiv(struct sshcipher_ctx *, const u_char *, size_t);
#endif /* CIPHER_H */
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