1 /* $OpenBSD: cipher.h,v 1.49 2016/08/03 05:41:57 djm 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 <sys/types.h>
41 #include <openssl/evp.h>
42 #include "cipher-chachapoly.h"
43 #include "cipher-aesctr.h"
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.
49 #define SSH_CIPHER_SSH2 -3
50 #define SSH_CIPHER_INVALID -2 /* No valid cipher selected. */
51 #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 */
58 #define SSH_CIPHER_BLOWFISH 6
59 #define SSH_CIPHER_RESERVED 7
60 #define SSH_CIPHER_MAX 31
62 #define CIPHER_ENCRYPT 1
63 #define CIPHER_DECRYPT 0
68 u_int cipher_mask_ssh1(int);
69 const struct sshcipher *cipher_by_name(const char *);
70 const struct sshcipher *cipher_by_number(int);
71 int cipher_number(const char *);
72 char *cipher_name(int);
73 const char *cipher_warning_message(const struct sshcipher_ctx *);
74 int ciphers_valid(const char *);
75 char *cipher_alg_list(char, int);
76 int cipher_init(struct sshcipher_ctx **, const struct sshcipher *,
77 const u_char *, u_int, const u_char *, u_int, int);
78 int cipher_crypt(struct sshcipher_ctx *, u_int, u_char *, const u_char *,
80 int cipher_get_length(struct sshcipher_ctx *, u_int *, u_int,
81 const u_char *, u_int);
82 void cipher_free(struct sshcipher_ctx *);
83 int cipher_set_key_string(struct sshcipher_ctx **,
84 const struct sshcipher *, const char *, int);
85 u_int cipher_blocksize(const struct sshcipher *);
86 u_int cipher_keylen(const struct sshcipher *);
87 u_int cipher_seclen(const struct sshcipher *);
88 u_int cipher_authlen(const struct sshcipher *);
89 u_int cipher_ivlen(const struct sshcipher *);
90 u_int cipher_is_cbc(const struct sshcipher *);
92 u_int cipher_ctx_is_plaintext(struct sshcipher_ctx *);
93 u_int cipher_ctx_get_number(struct sshcipher_ctx *);
95 u_int cipher_get_number(const struct sshcipher *);
96 int cipher_get_keyiv(struct sshcipher_ctx *, u_char *, u_int);
97 int cipher_set_keyiv(struct sshcipher_ctx *, const u_char *);
98 int cipher_get_keyiv_len(const struct sshcipher_ctx *);
99 int cipher_get_keycontext(const struct sshcipher_ctx *, u_char *);
100 void cipher_set_keycontext(struct sshcipher_ctx *, const u_char *);
102 #endif /* CIPHER_H */