summaryrefslogtreecommitdiffstats
path: root/crypto/openssh/cipher.h
blob: 06d4be4d75e0428520574bab9ff1a083ecf11fc6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
/* $OpenBSD: cipher.h,v 1.48 2015/07/08 19:09:25 markus Exp $ */

/*
 * Author: Tatu Ylonen <ylo@cs.hut.fi>
 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
 *                    All rights reserved
 *
 * As far as I am concerned, the code I have written for this software
 * can be used freely for any purpose.  Any derived versions of this
 * software must be clearly marked as such, and if the derived work is
 * incompatible with the protocol description in the RFC file, it must be
 * called by a name other than "ssh" or "Secure Shell".
 *
 * Copyright (c) 2000 Markus Friedl.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef CIPHER_H
#define CIPHER_H

#include <sys/types.h>
#include <openssl/evp.h>
#include "cipher-chachapoly.h"
#include "cipher-aesctr.h"

/*
 * Cipher types for SSH-1.  New types can be added, but old types should not
 * be removed for compatibility.  The maximum allowed value is 31.
 */
#define SSH_CIPHER_SSH2		-3
#define SSH_CIPHER_INVALID	-2	/* No valid cipher selected. */
#define SSH_CIPHER_NOT_SET	-1	/* None selected (invalid number). */
#define SSH_CIPHER_NONE		0	/* no encryption */
#define SSH_CIPHER_IDEA		1	/* IDEA CFB */
#define SSH_CIPHER_DES		2	/* DES CBC */
#define SSH_CIPHER_3DES		3	/* 3DES CBC */
#define SSH_CIPHER_BROKEN_TSS	4	/* TRI's Simple Stream encryption CBC */
#define SSH_CIPHER_BROKEN_RC4	5	/* Alleged RC4 */
#define SSH_CIPHER_BLOWFISH	6
#define SSH_CIPHER_RESERVED	7
#define SSH_CIPHER_MAX		31

#define CIPHER_ENCRYPT		1
#define CIPHER_DECRYPT		0

struct sshcipher;
struct sshcipher_ctx {
	int	plaintext;
	int	encrypt;
	EVP_CIPHER_CTX evp;
	struct chachapoly_ctx cp_ctx; /* XXX union with evp? */
	struct aesctr_ctx ac_ctx; /* XXX union with evp? */
	const struct sshcipher *cipher;
};

u_int	 cipher_mask_ssh1(int);
const struct sshcipher *cipher_by_name(const char *);
const struct sshcipher *cipher_by_number(int);
int	 cipher_number(const char *);
char	*cipher_name(int);
const char *cipher_warning_message(const struct sshcipher_ctx *);
int	 ciphers_valid(const char *);
char	*cipher_alg_list(char, int);
int	 cipher_init(struct sshcipher_ctx *, const struct sshcipher *,
    const u_char *, u_int, const u_char *, u_int, int);
int	 cipher_crypt(struct sshcipher_ctx *, u_int, u_char *, const u_char *,
    u_int, u_int, u_int);
int	 cipher_get_length(struct sshcipher_ctx *, u_int *, u_int,
    const u_char *, u_int);
int	 cipher_cleanup(struct sshcipher_ctx *);
int	 cipher_set_key_string(struct sshcipher_ctx *, const struct sshcipher *,
    const char *, int);
u_int	 cipher_blocksize(const struct sshcipher *);
u_int	 cipher_keylen(const struct sshcipher *);
u_int	 cipher_seclen(const struct sshcipher *);
u_int	 cipher_authlen(const struct sshcipher *);
u_int	 cipher_ivlen(const struct sshcipher *);
u_int	 cipher_is_cbc(const struct sshcipher *);

u_int	 cipher_get_number(const struct sshcipher *);
int	 cipher_get_keyiv(struct sshcipher_ctx *, u_char *, u_int);
int	 cipher_set_keyiv(struct sshcipher_ctx *, const u_char *);
int	 cipher_get_keyiv_len(const struct sshcipher_ctx *);
int	 cipher_get_keycontext(const struct sshcipher_ctx *, u_char *);
void	 cipher_set_keycontext(struct sshcipher_ctx *, const u_char *);
#endif				/* CIPHER_H */
OpenPOWER on IntegriCloud