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markus@openbsd.org60c2c4e2015-01-14 10:24:42 +00001/* $OpenBSD: cipher.h,v 1.47 2015/01/14 10:24:42 markus Exp $ */
Ben Lindstrom05764b92002-03-05 01:53:02 +00002
Damien Millerd4a8b7e1999-10-27 13:42:43 +10003/*
Damien Miller95def091999-11-25 00:26:21 +11004 * Author: Tatu Ylonen <ylo@cs.hut.fi>
Damien Miller95def091999-11-25 00:26:21 +11005 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
6 * All rights reserved
Damien Miller4af51302000-04-16 11:18:38 +10007 *
Damien Millere4340be2000-09-16 13:29:08 +11008 * 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".
Damien Miller874d77b2000-10-14 16:23:11 +110013 *
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.
Damien Miller95def091999-11-25 00:26:21 +110035 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100036
Damien Millerd4a8b7e1999-10-27 13:42:43 +100037#ifndef CIPHER_H
38#define CIPHER_H
39
Damien Miller86687062014-07-02 15:28:02 +100040#include <sys/types.h>
Damien Miller21cf4e02002-02-19 15:26:42 +110041#include <openssl/evp.h>
Damien Miller0fde8ac2013-11-21 14:12:23 +110042#include "cipher-chachapoly.h"
Damien Miller1f0311c2014-05-15 14:24:09 +100043#include "cipher-aesctr.h"
Damien Miller0fde8ac2013-11-21 14:12:23 +110044
Damien Miller874d77b2000-10-14 16:23:11 +110045/*
46 * Cipher types for SSH-1. New types can be added, but old types should not
47 * be removed for compatibility. The maximum allowed value is 31.
48 */
49#define SSH_CIPHER_SSH2 -3
Darren Tucker5cb30ad2004-08-12 22:40:24 +100050#define SSH_CIPHER_INVALID -2 /* No valid cipher selected. */
Damien Miller95def091999-11-25 00:26:21 +110051#define SSH_CIPHER_NOT_SET -1 /* None selected (invalid number). */
52#define SSH_CIPHER_NONE 0 /* no encryption */
53#define SSH_CIPHER_IDEA 1 /* IDEA CFB */
54#define SSH_CIPHER_DES 2 /* DES CBC */
55#define SSH_CIPHER_3DES 3 /* 3DES CBC */
56#define SSH_CIPHER_BROKEN_TSS 4 /* TRI's Simple Stream encryption CBC */
57#define SSH_CIPHER_BROKEN_RC4 5 /* Alleged RC4 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100058#define SSH_CIPHER_BLOWFISH 6
Damien Millerb38eff82000-04-01 11:09:21 +100059#define SSH_CIPHER_RESERVED 7
Damien Miller874d77b2000-10-14 16:23:11 +110060#define SSH_CIPHER_MAX 31
Damien Millerb38eff82000-04-01 11:09:21 +100061
Damien Miller963f6b22002-02-19 15:21:23 +110062#define CIPHER_ENCRYPT 1
63#define CIPHER_DECRYPT 0
64
Damien Miller86687062014-07-02 15:28:02 +100065struct sshcipher;
66struct sshcipher_ctx {
Damien Miller963f6b22002-02-19 15:21:23 +110067 int plaintext;
Damien Miller1d75abf2013-01-09 16:12:19 +110068 int encrypt;
Damien Miller21cf4e02002-02-19 15:26:42 +110069 EVP_CIPHER_CTX evp;
Damien Miller0fde8ac2013-11-21 14:12:23 +110070 struct chachapoly_ctx cp_ctx; /* XXX union with evp? */
Damien Miller1f0311c2014-05-15 14:24:09 +100071 struct aesctr_ctx ac_ctx; /* XXX union with evp? */
Damien Miller86687062014-07-02 15:28:02 +100072 const struct sshcipher *cipher;
Damien Miller874d77b2000-10-14 16:23:11 +110073};
Damien Millerd4a8b7e1999-10-27 13:42:43 +100074
markus@openbsd.org60c2c4e2015-01-14 10:24:42 +000075typedef struct sshcipher Cipher;
76typedef struct sshcipher_ctx CipherContext;
Damien Miller86687062014-07-02 15:28:02 +100077
Ben Lindstrom4cc240d2001-07-04 04:46:56 +000078u_int cipher_mask_ssh1(int);
Damien Miller86687062014-07-02 15:28:02 +100079const struct sshcipher *cipher_by_name(const char *);
80const struct sshcipher *cipher_by_number(int);
Ben Lindstrom4cc240d2001-07-04 04:46:56 +000081int cipher_number(const char *);
82char *cipher_name(int);
markus@openbsd.org60c2c4e2015-01-14 10:24:42 +000083const char *cipher_warning_message(const struct sshcipher_ctx *);
Ben Lindstrom4cc240d2001-07-04 04:46:56 +000084int ciphers_valid(const char *);
Damien Miller0fde8ac2013-11-21 14:12:23 +110085char *cipher_alg_list(char, int);
Damien Miller86687062014-07-02 15:28:02 +100086int cipher_init(struct sshcipher_ctx *, const struct sshcipher *,
87 const u_char *, u_int, const u_char *, u_int, int);
Damien Miller86687062014-07-02 15:28:02 +100088int cipher_crypt(struct sshcipher_ctx *, u_int, u_char *, const u_char *,
Damien Miller1d75abf2013-01-09 16:12:19 +110089 u_int, u_int, u_int);
Damien Miller86687062014-07-02 15:28:02 +100090int cipher_get_length(struct sshcipher_ctx *, u_int *, u_int,
Damien Miller0fde8ac2013-11-21 14:12:23 +110091 const u_char *, u_int);
Damien Miller86687062014-07-02 15:28:02 +100092int cipher_cleanup(struct sshcipher_ctx *);
93int cipher_set_key_string(struct sshcipher_ctx *, const struct sshcipher *,
94 const char *, int);
95u_int cipher_blocksize(const struct sshcipher *);
96u_int cipher_keylen(const struct sshcipher *);
97u_int cipher_seclen(const struct sshcipher *);
98u_int cipher_authlen(const struct sshcipher *);
99u_int cipher_ivlen(const struct sshcipher *);
100u_int cipher_is_cbc(const struct sshcipher *);
Ben Lindstrom212faca2002-03-22 01:39:44 +0000101
Damien Miller86687062014-07-02 15:28:02 +1000102u_int cipher_get_number(const struct sshcipher *);
103int cipher_get_keyiv(struct sshcipher_ctx *, u_char *, u_int);
104int cipher_set_keyiv(struct sshcipher_ctx *, const u_char *);
105int cipher_get_keyiv_len(const struct sshcipher_ctx *);
106int cipher_get_keycontext(const struct sshcipher_ctx *, u_char *);
107void cipher_set_keycontext(struct sshcipher_ctx *, const u_char *);
Damien Miller95def091999-11-25 00:26:21 +1100108#endif /* CIPHER_H */