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1 | /* | |
2 | * Copyright (c) 1999 Markus Friedl. All rights reserved. | |
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. | |
12 | * 3. All advertising materials mentioning features or use of this software | |
13 | * must display the following acknowledgement: | |
14 | * This product includes software developed by Markus Friedl. | |
15 | * 4. The name of the author may not be used to endorse or promote products | |
16 | * derived from this software without specific prior written permission. | |
17 | * | |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
28 | */ | |
29 | ||
30 | #include "includes.h" | |
31 | RCSID("$Id$"); | |
32 | ||
33 | #include "ssh.h" | |
34 | #include "packet.h" | |
35 | #include "xmalloc.h" | |
36 | #include "compat.h" | |
37 | ||
38 | int compat13 = 0; | |
39 | int compat20 = 0; | |
40 | int datafellows = 0; | |
41 | ||
42 | void | |
43 | enable_compat20(void) | |
44 | { | |
45 | verbose("Enabling compatibility mode for protocol 2.0"); | |
46 | compat20 = 1; | |
47 | } | |
48 | void | |
49 | enable_compat13(void) | |
50 | { | |
51 | verbose("Enabling compatibility mode for protocol 1.3"); | |
52 | compat13 = 1; | |
53 | } | |
54 | /* datafellows bug compatibility */ | |
55 | void | |
56 | compat_datafellows(const char *version) | |
57 | { | |
58 | int i; | |
59 | size_t len; | |
60 | struct { | |
61 | char *version; | |
62 | int bugs; | |
63 | } check[] = { | |
64 | {"2.1.0", SSH_BUG_SIGBLOB|SSH_BUG_HMAC}, | |
65 | {"2.0.1", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|SSH_BUG_PUBKEYAUTH|SSH_BUG_X11FWD}, | |
66 | {NULL, 0} | |
67 | }; | |
68 | for (i = 0; check[i].version; i++) { | |
69 | len = strlen(check[i].version); | |
70 | if (strlen(version) >= len && | |
71 | (strncmp(version, check[i].version, len) == 0)) { | |
72 | verbose("datafellows: %.200s", version); | |
73 | datafellows = check[i].bugs; | |
74 | return; | |
75 | } | |
76 | } | |
77 | } | |
78 | ||
79 | #define SEP "," | |
80 | int | |
81 | proto_spec(const char *spec) | |
82 | { | |
83 | char *s = xstrdup(spec); | |
84 | char *p; | |
85 | int ret = SSH_PROTO_UNKNOWN; | |
86 | ||
87 | for ((p = strtok(s, SEP)); p; (p = strtok(NULL, SEP))) { | |
88 | switch(atoi(p)) { | |
89 | case 1: | |
90 | if (ret == SSH_PROTO_UNKNOWN) | |
91 | ret |= SSH_PROTO_1_PREFERRED; | |
92 | ret |= SSH_PROTO_1; | |
93 | break; | |
94 | case 2: | |
95 | ret |= SSH_PROTO_2; | |
96 | break; | |
97 | default: | |
98 | log("ignoring bad proto spec: '%s'.", p); | |
99 | break; | |
100 | } | |
101 | } | |
102 | xfree(s); | |
103 | return ret; | |
104 | } |