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3c0ef626 | 1 | /* |
2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> | |
3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
4 | * All rights reserved | |
5 | * | |
6 | * As far as I am concerned, the code I have written for this software | |
7 | * can be used freely for any purpose. Any derived versions of this | |
8 | * software must be clearly marked as such, and if the derived work is | |
9 | * incompatible with the protocol description in the RFC file, it must be | |
10 | * called by a name other than "ssh" or "Secure Shell". | |
11 | * | |
12 | * Copyright (c) 2000 Markus Friedl. All rights reserved. | |
13 | * | |
14 | * Redistribution and use in source and binary forms, with or without | |
15 | * modification, are permitted provided that the following conditions | |
16 | * are met: | |
17 | * 1. Redistributions of source code must retain the above copyright | |
18 | * notice, this list of conditions and the following disclaimer. | |
19 | * 2. Redistributions in binary form must reproduce the above copyright | |
20 | * notice, this list of conditions and the following disclaimer in the | |
21 | * documentation and/or other materials provided with the distribution. | |
22 | * | |
23 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
24 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
25 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
26 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
27 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
28 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
29 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
30 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
31 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
32 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
33 | */ | |
34 | ||
35 | /* RCSID("$OpenBSD: cipher.h,v 1.29 2001/08/23 11:31:59 markus Exp $"); */ | |
36 | ||
37 | #ifndef CIPHER_H | |
38 | #define CIPHER_H | |
39 | ||
40 | #include <openssl/des.h> | |
41 | #include <openssl/blowfish.h> | |
42 | #include <openssl/rc4.h> | |
43 | #include <openssl/cast.h> | |
44 | #include "rijndael.h" | |
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_ILLEGAL -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 | typedef struct Cipher Cipher; | |
63 | typedef struct CipherContext CipherContext; | |
64 | ||
65 | struct CipherContext { | |
66 | union { | |
67 | struct { | |
68 | des_key_schedule key; | |
69 | des_cblock iv; | |
70 | } des; | |
71 | struct { | |
72 | des_key_schedule key1; | |
73 | des_key_schedule key2; | |
74 | des_key_schedule key3; | |
75 | des_cblock iv1; | |
76 | des_cblock iv2; | |
77 | des_cblock iv3; | |
78 | } des3; | |
79 | struct { | |
80 | struct bf_key_st key; | |
81 | u_char iv[8]; | |
82 | } bf; | |
83 | struct { | |
84 | CAST_KEY key; | |
85 | u_char iv[8]; | |
86 | } cast; | |
87 | struct { | |
88 | u_char iv[16]; | |
89 | rijndael_ctx enc; | |
90 | rijndael_ctx dec; | |
91 | } rijndael; | |
92 | RC4_KEY rc4; | |
93 | } u; | |
94 | Cipher *cipher; | |
95 | }; | |
96 | struct Cipher { | |
97 | char *name; | |
98 | int number; /* for ssh1 only */ | |
99 | u_int block_size; | |
100 | u_int key_len; | |
101 | void (*setkey)(CipherContext *, const u_char *, u_int); | |
102 | void (*setiv)(CipherContext *, const u_char *, u_int); | |
103 | void (*encrypt)(CipherContext *, u_char *, const u_char *, u_int); | |
104 | void (*decrypt)(CipherContext *, u_char *, const u_char *, u_int); | |
105 | }; | |
106 | ||
107 | u_int cipher_mask_ssh1(int); | |
108 | Cipher *cipher_by_name(const char *); | |
109 | Cipher *cipher_by_number(int); | |
110 | int cipher_number(const char *); | |
111 | char *cipher_name(int); | |
112 | int ciphers_valid(const char *); | |
113 | void cipher_init(CipherContext *, Cipher *, const u_char *, u_int, | |
114 | const u_char *, u_int); | |
115 | void cipher_encrypt(CipherContext *, u_char *, const u_char *, u_int); | |
116 | void cipher_decrypt(CipherContext *, u_char *, const u_char *, u_int); | |
117 | void cipher_set_key_string(CipherContext *, Cipher *, const char *); | |
118 | ||
119 | #endif /* CIPHER_H */ |