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1/* $OpenBSD: cipher.h,v 1.56 2023/10/10 06:49:54 tb 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#ifdef WITH_OPENSSL
42#include <openssl/evp.h>
43#endif
44#include "cipher-chachapoly.h"
45#include "cipher-aesctr.h"
46
47#define CIPHER_ENCRYPT 1
48#define CIPHER_DECRYPT 0
49
50struct sshcipher;
51struct sshcipher_ctx;
52
53const struct sshcipher *cipher_by_name(const char *);
54const char *cipher_warning_message(const struct sshcipher_ctx *);
55int ciphers_valid(const char *);
56char *cipher_alg_list(char, int);
57const char *compression_alg_list(int);
58int cipher_init(struct sshcipher_ctx **, const struct sshcipher *,
59 const u_char *, u_int, const u_char *, u_int, int);
60int cipher_crypt(struct sshcipher_ctx *, u_int, u_char *, const u_char *,
61 u_int, u_int, u_int);
62int cipher_get_length(struct sshcipher_ctx *, u_int *, u_int,
63 const u_char *, u_int);
64void cipher_free(struct sshcipher_ctx *);
65u_int cipher_blocksize(const struct sshcipher *);
66u_int cipher_keylen(const struct sshcipher *);
67u_int cipher_seclen(const struct sshcipher *);
68u_int cipher_authlen(const struct sshcipher *);
69u_int cipher_ivlen(const struct sshcipher *);
70u_int cipher_is_cbc(const struct sshcipher *);
71
72u_int cipher_ctx_is_plaintext(struct sshcipher_ctx *);
73
74int cipher_get_keyiv(struct sshcipher_ctx *, u_char *, size_t);
75int cipher_set_keyiv(struct sshcipher_ctx *, const u_char *, size_t);
76
77#endif /* CIPHER_H */