2 * Copyright (c) 1999,2000 Markus Friedl. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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.
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.
26 RCSID("$OpenBSD: compat.c,v 1.24 2000/10/10 20:20:45 markus Exp $");
34 #else /* Use native regex libraries */
36 #endif /* HAVE_LIBRX */
45 verbose("Enabling compatibility mode for protocol 2.0");
51 verbose("Enabling compatibility mode for protocol 1.3");
54 /* datafellows bug compatibility */
56 compat_datafellows(const char *version)
66 {"^2\\.1\\.0 ", SSH_BUG_SIGBLOB|SSH_BUG_HMAC},
67 {"^2\\.0\\.", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|SSH_BUG_PUBKEYAUTH|SSH_BUG_X11FWD},
68 {"^2\\.[23]\\.0 ", SSH_BUG_HMAC|SSH_COMPAT_SESSIONID_ENCODING},
69 {"^2\\.[2-9]\\.", SSH_COMPAT_SESSIONID_ENCODING},
70 {"^2\\.", SSH_BUG_HMAC|SSH_COMPAT_SESSIONID_ENCODING},
73 /* process table, return first match */
74 for (i = 0; check[i].pat; i++) {
75 ret = regcomp(®, check[i].pat, REG_EXTENDED|REG_NOSUB);
77 regerror(ret, ®, ebuf, sizeof(ebuf));
78 ebuf[sizeof(ebuf)-1] = '\0';
79 error("regerror: %s", ebuf);
82 ret = regexec(®, version, 0, NULL, 0);
85 debug("match: %s pat %s\n", version, check[i].pat);
86 datafellows = check[i].bugs;
90 debug("no match: %s", version);
95 proto_spec(const char *spec)
98 int ret = SSH_PROTO_UNKNOWN;
102 q = s = xstrdup(spec);
103 for ((p = strsep(&q, SEP)); p && *p != '\0'; (p = strsep(&q, SEP))) {
106 if (ret == SSH_PROTO_UNKNOWN)
107 ret |= SSH_PROTO_1_PREFERRED;
114 log("ignoring bad proto spec: '%s'.", p);