1/* $OpenBSD: cipher.h,v 1.52 2017/05/07 23:12:57 djm Exp $ */
2
3/*
4 * Author: Tatu Ylonen <ylo@cs.hut.fi>
5 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
6 *                    All rights reserved
7 *
8 * As far as I am concerned, the code I have written for this software
9 * can be used freely for any purpose.  Any derived versions of this
10 * software must be clearly marked as such, and if the derived work is
11 * incompatible with the protocol description in the RFC file, it must be
12 * called by a name other than "ssh" or "Secure Shell".
13 *
14 * Copyright (c) 2000 Markus Friedl.  All rights reserved.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 *    notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 *    notice, this list of conditions and the following disclaimer in the
23 *    documentation and/or other materials provided with the distribution.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
29 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
30 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
34 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 */
36
37#ifndef CIPHER_H
38#define CIPHER_H
39
40#include <sys/types.h>
41#include <openssl/evp.h>
42#include "cipher-chachapoly.h"
43#include "cipher-aesctr.h"
44
45#define CIPHER_ENCRYPT		1
46#define CIPHER_DECRYPT		0
47
48struct sshcipher;
49struct sshcipher_ctx;
50
51const struct sshcipher *cipher_by_name(const char *);
52const char *cipher_warning_message(const struct sshcipher_ctx *);
53int	 ciphers_valid(const char *);
54char	*cipher_alg_list(char, int);
55int	 cipher_init(struct sshcipher_ctx **, const struct sshcipher *,
56    const u_char *, u_int, const u_char *, u_int, int);
57int	 cipher_crypt(struct sshcipher_ctx *, u_int, u_char *, const u_char *,
58    u_int, u_int, u_int);
59int	 cipher_get_length(struct sshcipher_ctx *, u_int *, u_int,
60    const u_char *, u_int);
61void	 cipher_free(struct sshcipher_ctx *);
62u_int	 cipher_blocksize(const struct sshcipher *);
63u_int	 cipher_keylen(const struct sshcipher *);
64u_int	 cipher_seclen(const struct sshcipher *);
65u_int	 cipher_authlen(const struct sshcipher *);
66u_int	 cipher_ivlen(const struct sshcipher *);
67u_int	 cipher_is_cbc(const struct sshcipher *);
68
69u_int	 cipher_ctx_is_plaintext(struct sshcipher_ctx *);
70
71int	 cipher_get_keyiv(struct sshcipher_ctx *, u_char *, size_t);
72int	 cipher_set_keyiv(struct sshcipher_ctx *, const u_char *, size_t);
73int	 cipher_get_keyiv_len(const struct sshcipher_ctx *);
74
75#endif				/* CIPHER_H */
76