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2e437378 | 1 | /* $OpenBSD: cipher.h,v 1.36 2006/03/25 22:22:42 djm Exp $ */ |
e9a17296 | 2 | |
3c0ef626 | 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 | ||
3c0ef626 | 37 | #ifndef CIPHER_H |
38 | #define CIPHER_H | |
39 | ||
e9a17296 | 40 | #include <openssl/evp.h> |
3c0ef626 | 41 | /* |
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 | |
1b56ff3d | 46 | #define SSH_CIPHER_INVALID -2 /* No valid cipher selected. */ |
3c0ef626 | 47 | #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 */ | |
54 | #define SSH_CIPHER_BLOWFISH 6 | |
55 | #define SSH_CIPHER_RESERVED 7 | |
56 | #define SSH_CIPHER_MAX 31 | |
57 | ||
e9a17296 | 58 | #define CIPHER_ENCRYPT 1 |
59 | #define CIPHER_DECRYPT 0 | |
60 | ||
3c0ef626 | 61 | typedef struct Cipher Cipher; |
62 | typedef struct CipherContext CipherContext; | |
63 | ||
e9a17296 | 64 | struct Cipher; |
3c0ef626 | 65 | struct CipherContext { |
e9a17296 | 66 | int plaintext; |
67 | EVP_CIPHER_CTX evp; | |
3c0ef626 | 68 | Cipher *cipher; |
69 | }; | |
3c0ef626 | 70 | |
71 | u_int cipher_mask_ssh1(int); | |
72 | Cipher *cipher_by_name(const char *); | |
73 | Cipher *cipher_by_number(int); | |
74 | int cipher_number(const char *); | |
75 | char *cipher_name(int); | |
76 | int ciphers_valid(const char *); | |
77 | void cipher_init(CipherContext *, Cipher *, const u_char *, u_int, | |
e9a17296 | 78 | const u_char *, u_int, int); |
79 | void cipher_crypt(CipherContext *, u_char *, const u_char *, u_int); | |
80 | void cipher_cleanup(CipherContext *); | |
81 | void cipher_set_key_string(CipherContext *, Cipher *, const char *, int); | |
416fd2a8 | 82 | u_int cipher_blocksize(const Cipher *); |
83 | u_int cipher_keylen(const Cipher *); | |
2980ea68 | 84 | |
416fd2a8 | 85 | u_int cipher_get_number(const Cipher *); |
2980ea68 | 86 | void cipher_get_keyiv(CipherContext *, u_char *, u_int); |
87 | void cipher_set_keyiv(CipherContext *, u_char *); | |
416fd2a8 | 88 | int cipher_get_keyiv_len(const CipherContext *); |
89 | int cipher_get_keycontext(const CipherContext *, u_char *); | |
2980ea68 | 90 | void cipher_set_keycontext(CipherContext *, u_char *); |
3c0ef626 | 91 | #endif /* CIPHER_H */ |