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Damien Millerea111192013-04-23 19:24:32 +10001/* $OpenBSD: cipher.h,v 1.40 2013/04/19 01:06:50 djm 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 Miller21cf4e02002-02-19 15:26:42 +110040#include <openssl/evp.h>
Damien Miller874d77b2000-10-14 16:23:11 +110041/*
42 * Cipher types for SSH-1. New types can be added, but old types should not
43 * be removed for compatibility. The maximum allowed value is 31.
44 */
45#define SSH_CIPHER_SSH2 -3
Darren Tucker5cb30ad2004-08-12 22:40:24 +100046#define SSH_CIPHER_INVALID -2 /* No valid cipher selected. */
Damien Miller95def091999-11-25 00:26:21 +110047#define SSH_CIPHER_NOT_SET -1 /* None selected (invalid number). */
48#define SSH_CIPHER_NONE 0 /* no encryption */
49#define SSH_CIPHER_IDEA 1 /* IDEA CFB */
50#define SSH_CIPHER_DES 2 /* DES CBC */
51#define SSH_CIPHER_3DES 3 /* 3DES CBC */
52#define SSH_CIPHER_BROKEN_TSS 4 /* TRI's Simple Stream encryption CBC */
53#define SSH_CIPHER_BROKEN_RC4 5 /* Alleged RC4 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100054#define SSH_CIPHER_BLOWFISH 6
Damien Millerb38eff82000-04-01 11:09:21 +100055#define SSH_CIPHER_RESERVED 7
Damien Miller874d77b2000-10-14 16:23:11 +110056#define SSH_CIPHER_MAX 31
Damien Millerb38eff82000-04-01 11:09:21 +100057
Damien Miller963f6b22002-02-19 15:21:23 +110058#define CIPHER_ENCRYPT 1
59#define CIPHER_DECRYPT 0
60
Damien Miller874d77b2000-10-14 16:23:11 +110061typedef struct Cipher Cipher;
62typedef struct CipherContext CipherContext;
Damien Millerd4a8b7e1999-10-27 13:42:43 +100063
Damien Miller963f6b22002-02-19 15:21:23 +110064struct Cipher;
Damien Miller874d77b2000-10-14 16:23:11 +110065struct CipherContext {
Damien Miller963f6b22002-02-19 15:21:23 +110066 int plaintext;
Damien Miller1d75abf2013-01-09 16:12:19 +110067 int encrypt;
Damien Miller21cf4e02002-02-19 15:26:42 +110068 EVP_CIPHER_CTX evp;
Damien Millerea111192013-04-23 19:24:32 +100069 const Cipher *cipher;
Damien Miller874d77b2000-10-14 16:23:11 +110070};
Damien Millerd4a8b7e1999-10-27 13:42:43 +100071
Ben Lindstrom4cc240d2001-07-04 04:46:56 +000072u_int cipher_mask_ssh1(int);
Damien Millerea111192013-04-23 19:24:32 +100073const Cipher *cipher_by_name(const char *);
74const Cipher *cipher_by_number(int);
Ben Lindstrom4cc240d2001-07-04 04:46:56 +000075int cipher_number(const char *);
76char *cipher_name(int);
77int ciphers_valid(const char *);
Damien Millerea111192013-04-23 19:24:32 +100078char *cipher_alg_list(void);
79void cipher_init(CipherContext *, const Cipher *, const u_char *, u_int,
Damien Miller963f6b22002-02-19 15:21:23 +110080 const u_char *, u_int, int);
Damien Miller1d75abf2013-01-09 16:12:19 +110081void cipher_crypt(CipherContext *, u_char *, const u_char *,
82 u_int, u_int, u_int);
Damien Miller963f6b22002-02-19 15:21:23 +110083void cipher_cleanup(CipherContext *);
Damien Millerea111192013-04-23 19:24:32 +100084void cipher_set_key_string(CipherContext *, const Cipher *, const char *, int);
Damien Millerf58b58c2003-11-17 21:18:23 +110085u_int cipher_blocksize(const Cipher *);
86u_int cipher_keylen(const Cipher *);
Damien Miller1d75abf2013-01-09 16:12:19 +110087u_int cipher_authlen(const Cipher *);
88u_int cipher_ivlen(const Cipher *);
Damien Miller13ae44c2009-01-28 16:38:41 +110089u_int cipher_is_cbc(const Cipher *);
Ben Lindstrom212faca2002-03-22 01:39:44 +000090
Damien Millerf58b58c2003-11-17 21:18:23 +110091u_int cipher_get_number(const Cipher *);
Ben Lindstrom212faca2002-03-22 01:39:44 +000092void cipher_get_keyiv(CipherContext *, u_char *, u_int);
93void cipher_set_keyiv(CipherContext *, u_char *);
Damien Millerf58b58c2003-11-17 21:18:23 +110094int cipher_get_keyiv_len(const CipherContext *);
95int cipher_get_keycontext(const CipherContext *, u_char *);
Ben Lindstrom212faca2002-03-22 01:39:44 +000096void cipher_set_keycontext(CipherContext *, u_char *);
Damien Miller95def091999-11-25 00:26:21 +110097#endif /* CIPHER_H */