1 /* $OpenBSD: cipher.h,v 1.44 2014/01/25 10:12:50 dtucker Exp $ */
4 * Author: Tatu Ylonen <ylo@cs.hut.fi>
5 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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".
14 * Copyright (c) 2000 Markus Friedl. All rights reserved.
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
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.
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.
40 #include <openssl/evp.h>
41 #include "cipher-chachapoly.h"
44 * Cipher types for SSH-1. New types can be added, but old types should not
45 * be removed for compatibility. The maximum allowed value is 31.
47 #define SSH_CIPHER_SSH2 -3
48 #define SSH_CIPHER_INVALID -2 /* No valid cipher selected. */
49 #define SSH_CIPHER_NOT_SET -1 /* None selected (invalid number). */
50 #define SSH_CIPHER_NONE 0 /* no encryption */
51 #define SSH_CIPHER_IDEA 1 /* IDEA CFB */
52 #define SSH_CIPHER_DES 2 /* DES CBC */
53 #define SSH_CIPHER_3DES 3 /* 3DES CBC */
54 #define SSH_CIPHER_BROKEN_TSS 4 /* TRI's Simple Stream encryption CBC */
55 #define SSH_CIPHER_BROKEN_RC4 5 /* Alleged RC4 */
56 #define SSH_CIPHER_BLOWFISH 6
57 #define SSH_CIPHER_RESERVED 7
58 #define SSH_CIPHER_MAX 31
60 #define CIPHER_ENCRYPT 1
61 #define CIPHER_DECRYPT 0
63 typedef struct Cipher Cipher;
64 typedef struct CipherContext CipherContext;
67 struct CipherContext {
71 struct chachapoly_ctx cp_ctx; /* XXX union with evp? */
75 u_int cipher_mask_ssh1(int);
76 const Cipher *cipher_by_name(const char *);
77 const Cipher *cipher_by_number(int);
78 int cipher_number(const char *);
79 char *cipher_name(int);
80 int ciphers_valid(const char *);
81 char *cipher_alg_list(char, int);
82 void cipher_init(CipherContext *, const Cipher *, const u_char *, u_int,
83 const u_char *, u_int, int);
84 int cipher_crypt(CipherContext *, u_int, u_char *, const u_char *,
86 int cipher_get_length(CipherContext *, u_int *, u_int,
87 const u_char *, u_int);
88 void cipher_cleanup(CipherContext *);
89 void cipher_set_key_string(CipherContext *, const Cipher *, const char *, int);
90 u_int cipher_blocksize(const Cipher *);
91 u_int cipher_keylen(const Cipher *);
92 u_int cipher_seclen(const Cipher *);
93 u_int cipher_authlen(const Cipher *);
94 u_int cipher_ivlen(const Cipher *);
95 u_int cipher_is_cbc(const Cipher *);
97 u_int cipher_get_number(const Cipher *);
98 void cipher_get_keyiv(CipherContext *, u_char *, u_int);
99 void cipher_set_keyiv(CipherContext *, u_char *);
100 int cipher_get_keyiv_len(const CipherContext *);
101 int cipher_get_keycontext(const CipherContext *, u_char *);
102 void cipher_set_keycontext(CipherContext *, u_char *);
103 #endif /* CIPHER_H */