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aa3378df | 1 | /* |
bcbf86ec | 2 | * Copyright (c) 1999,2000 Markus Friedl. All rights reserved. |
aa3378df | 3 | * |
4 | * Redistribution and use in source and binary forms, with or without | |
5 | * modification, are permitted provided that the following conditions | |
6 | * are met: | |
7 | * 1. Redistributions of source code must retain the above copyright | |
8 | * notice, this list of conditions and the following disclaimer. | |
9 | * 2. Redistributions in binary form must reproduce the above copyright | |
10 | * notice, this list of conditions and the following disclaimer in the | |
11 | * documentation and/or other materials provided with the distribution. | |
aa3378df | 12 | * |
13 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
15 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
16 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
17 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
18 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
19 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
20 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
21 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
22 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
23 | */ | |
24 | ||
8efc0c15 | 25 | #include "includes.h" |
bcbf86ec | 26 | RCSID("$OpenBSD: compat.c,v 1.23 2000/09/07 21:13:37 markus Exp $"); |
8efc0c15 | 27 | |
28 | #include "ssh.h" | |
7e7327a1 | 29 | #include "packet.h" |
a8be9f80 | 30 | #include "xmalloc.h" |
31 | #include "compat.h" | |
8efc0c15 | 32 | |
5260325f | 33 | int compat13 = 0; |
7e7327a1 | 34 | int compat20 = 0; |
35 | int datafellows = 0; | |
5260325f | 36 | |
6ae2364d | 37 | void |
7e7327a1 | 38 | enable_compat20(void) |
39 | { | |
8ce64345 | 40 | verbose("Enabling compatibility mode for protocol 2.0"); |
41 | compat20 = 1; | |
7e7327a1 | 42 | } |
6ae2364d | 43 | void |
5260325f | 44 | enable_compat13(void) |
45 | { | |
46 | verbose("Enabling compatibility mode for protocol 1.3"); | |
47 | compat13 = 1; | |
8efc0c15 | 48 | } |
7e7327a1 | 49 | /* datafellows bug compatibility */ |
50 | void | |
51 | compat_datafellows(const char *version) | |
52 | { | |
53 | int i; | |
54 | size_t len; | |
d0c832f3 | 55 | struct { |
56 | char *version; | |
57 | int bugs; | |
58 | } check[] = { | |
59 | {"2.1.0", SSH_BUG_SIGBLOB|SSH_BUG_HMAC}, | |
60 | {"2.0.1", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|SSH_BUG_PUBKEYAUTH|SSH_BUG_X11FWD}, | |
14a9a859 | 61 | {"2.", SSH_BUG_HMAC|SSH_COMPAT_SESSIONID_ENCODING}, |
d0c832f3 | 62 | {NULL, 0} |
7e7327a1 | 63 | }; |
14a9a859 | 64 | /* process table, return first match */ |
d0c832f3 | 65 | for (i = 0; check[i].version; i++) { |
66 | len = strlen(check[i].version); | |
7e7327a1 | 67 | if (strlen(version) >= len && |
d0c832f3 | 68 | (strncmp(version, check[i].version, len) == 0)) { |
a8be9f80 | 69 | verbose("datafellows: %.200s", version); |
d0c832f3 | 70 | datafellows = check[i].bugs; |
7e7327a1 | 71 | return; |
72 | } | |
73 | } | |
74 | } | |
a8be9f80 | 75 | |
76 | #define SEP "," | |
77 | int | |
78 | proto_spec(const char *spec) | |
79 | { | |
089fbbd2 | 80 | char *s, *p, *q; |
a8be9f80 | 81 | int ret = SSH_PROTO_UNKNOWN; |
82 | ||
71276795 | 83 | if (spec == NULL) |
84 | return ret; | |
089fbbd2 | 85 | q = s = xstrdup(spec); |
86 | for ((p = strsep(&q, SEP)); p && *p != '\0'; (p = strsep(&q, SEP))) { | |
a8be9f80 | 87 | switch(atoi(p)) { |
88 | case 1: | |
89 | if (ret == SSH_PROTO_UNKNOWN) | |
90 | ret |= SSH_PROTO_1_PREFERRED; | |
91 | ret |= SSH_PROTO_1; | |
92 | break; | |
93 | case 2: | |
94 | ret |= SSH_PROTO_2; | |
95 | break; | |
96 | default: | |
97 | log("ignoring bad proto spec: '%s'.", p); | |
98 | break; | |
99 | } | |
100 | } | |
101 | xfree(s); | |
102 | return ret; | |
103 | } |