Globus Toolkit  6.0.1493989444
cipher.h
1 /* $OpenBSD: cipher.h,v 1.48 2015/07/08 19:09:25 markus Exp $ */
2 
3 /*
4  * Author: Tatu Ylonen <ylo@cs.hut.fi>
5  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
6  * All rights reserved
7  *
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".
13  *
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.
35  */
36 
37 #ifndef CIPHER_H
38 #define CIPHER_H
39 
40 #include <sys/types.h>
41 #include <openssl/evp.h>
42 #include "cipher-chachapoly.h"
43 #include "cipher-aesctr.h"
44 
45 /*
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
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
61 
62 #define CIPHER_ENCRYPT 1
63 #define CIPHER_DECRYPT 0
64 
65 struct sshcipher;
66 struct sshcipher_ctx {
67  int plaintext;
68  int encrypt;
69  EVP_CIPHER_CTX *evp;
70  struct chachapoly_ctx cp_ctx; /* XXX union with evp? */
71  struct aesctr_ctx ac_ctx; /* XXX union with evp? */
72  const struct sshcipher *cipher;
73 };
74 
75 void ssh_aes_ctr_thread_destroy(EVP_CIPHER_CTX *ctx); // defined in cipher-ctr-mt.c
76 void ssh_aes_ctr_thread_reconstruction(EVP_CIPHER_CTX *ctx);
77 
78 u_int cipher_mask_ssh1(int);
79 struct sshcipher *cipher_by_name(const char *);
80 const struct sshcipher *cipher_by_number(int);
81 int cipher_number(const char *);
82 char *cipher_name(int);
83 const char *cipher_warning_message(const struct sshcipher_ctx *);
84 int ciphers_valid(const char *);
85 char *cipher_alg_list(char, int);
86 int cipher_init(struct sshcipher_ctx *, const struct sshcipher *,
87  const u_char *, u_int, const u_char *, u_int, int);
88 int cipher_crypt(struct sshcipher_ctx *, u_int, u_char *, const u_char *,
89  u_int, u_int, u_int);
90 int cipher_get_length(struct sshcipher_ctx *, u_int *, u_int,
91  const u_char *, u_int);
92 int cipher_cleanup(struct sshcipher_ctx *);
93 int cipher_set_key_string(struct sshcipher_ctx *, const struct sshcipher *,
94  const char *, int);
95 u_int cipher_blocksize(const struct sshcipher *);
96 u_int cipher_keylen(const struct sshcipher *);
97 u_int cipher_seclen(const struct sshcipher *);
98 u_int cipher_authlen(const struct sshcipher *);
99 u_int cipher_ivlen(const struct sshcipher *);
100 u_int cipher_is_cbc(const struct sshcipher *);
101 void cipher_reset_multithreaded(void);
102 const char *cipher_return_name(const struct sshcipher *);
103 
104 u_int cipher_get_number(const struct sshcipher *);
105 int cipher_get_keyiv(struct sshcipher_ctx *, u_char *, u_int);
106 int cipher_set_keyiv(struct sshcipher_ctx *, const u_char *);
107 int cipher_get_keyiv_len(const struct sshcipher_ctx *);
108 int cipher_get_keycontext(const struct sshcipher_ctx *, u_char *);
109 void cipher_set_keycontext(struct sshcipher_ctx *, const u_char *);
110 #endif /* CIPHER_H */