1 /* $OpenBSD: compat.c,v 1.74 2006/07/22 20:48:23 stevesk Exp $ */
3 * Copyright (c) 1999, 2000, 2001, 2002 Markus Friedl. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
44 debug("Enabling compatibility mode for protocol 2.0");
50 debug("Enabling compatibility mode for protocol 1.3");
53 /* datafellows bug compatibility */
55 compat_datafellows(const char *version)
65 "OpenSSH_2.2*", SSH_OLD_SESSIONID|SSH_BUG_BANNER|
66 SSH_OLD_DHGEX|SSH_BUG_NOREKEY|
67 SSH_BUG_EXTEOF|SSH_OLD_FORWARD_ADDR},
68 { "OpenSSH_2.3.0*", SSH_BUG_BANNER|SSH_BUG_BIGENDIANAES|
69 SSH_OLD_DHGEX|SSH_BUG_NOREKEY|
70 SSH_BUG_EXTEOF|SSH_OLD_FORWARD_ADDR},
71 { "OpenSSH_2.3.*", SSH_BUG_BIGENDIANAES|SSH_OLD_DHGEX|
72 SSH_BUG_NOREKEY|SSH_BUG_EXTEOF|
73 SSH_OLD_FORWARD_ADDR},
76 SSH_BUG_BIGENDIANAES|SSH_OLD_DHGEX|
77 SSH_BUG_NOREKEY|SSH_BUG_EXTEOF|
78 SSH_OLD_FORWARD_ADDR},
81 "OpenSSH_2.5.2*", SSH_OLD_DHGEX|SSH_BUG_NOREKEY|
82 SSH_BUG_EXTEOF|SSH_OLD_FORWARD_ADDR},
83 { "OpenSSH_2.5.3*", SSH_BUG_NOREKEY|SSH_BUG_EXTEOF|
84 SSH_OLD_FORWARD_ADDR},
87 "OpenSSH_3.1*", SSH_BUG_EXTEOF|SSH_OLD_FORWARD_ADDR},
88 { "OpenSSH_3.*", SSH_OLD_FORWARD_ADDR },
89 { "Sun_SSH_1.0*", SSH_BUG_NOREKEY|SSH_BUG_EXTEOF},
92 { "2.1.0*", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
93 SSH_OLD_SESSIONID|SSH_BUG_DEBUG|
94 SSH_BUG_RSASIGMD5|SSH_BUG_HBSERVICE|
96 { "2.1 *", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
97 SSH_OLD_SESSIONID|SSH_BUG_DEBUG|
98 SSH_BUG_RSASIGMD5|SSH_BUG_HBSERVICE|
106 "2.0.19*", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
107 SSH_OLD_SESSIONID|SSH_BUG_DEBUG|
108 SSH_BUG_PKSERVICE|SSH_BUG_X11FWD|
109 SSH_BUG_PKOK|SSH_BUG_RSASIGMD5|
110 SSH_BUG_HBSERVICE|SSH_BUG_OPENFAILURE|
111 SSH_BUG_DUMMYCHAN|SSH_BUG_FIRSTKEX },
113 "2.0.12*", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
114 SSH_OLD_SESSIONID|SSH_BUG_DEBUG|
115 SSH_BUG_PKSERVICE|SSH_BUG_X11FWD|
116 SSH_BUG_PKAUTH|SSH_BUG_PKOK|
117 SSH_BUG_RSASIGMD5|SSH_BUG_OPENFAILURE|
118 SSH_BUG_DUMMYCHAN|SSH_BUG_FIRSTKEX },
119 { "2.0.*", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
120 SSH_OLD_SESSIONID|SSH_BUG_DEBUG|
121 SSH_BUG_PKSERVICE|SSH_BUG_X11FWD|
122 SSH_BUG_PKAUTH|SSH_BUG_PKOK|
123 SSH_BUG_RSASIGMD5|SSH_BUG_OPENFAILURE|
124 SSH_BUG_DERIVEKEY|SSH_BUG_DUMMYCHAN|
127 "2.3.0*", SSH_BUG_HMAC|SSH_BUG_DEBUG|
128 SSH_BUG_RSASIGMD5|SSH_BUG_FIRSTKEX },
129 { "2.3.*", SSH_BUG_DEBUG|SSH_BUG_RSASIGMD5|
131 { "2.4", SSH_OLD_SESSIONID }, /* Van Dyke */
132 { "2.*", SSH_BUG_DEBUG|SSH_BUG_FIRSTKEX },
133 { "3.0.*", SSH_BUG_DEBUG },
134 { "3.0 SecureCRT*", SSH_OLD_SESSIONID },
135 { "1.7 SecureFX*", SSH_OLD_SESSIONID },
140 "1.2.22*", SSH_BUG_IGNOREMSG },
141 { "1.3.2*", /* F-Secure */
143 { "*SSH Compatible Server*", /* Netscreen */
144 SSH_BUG_PASSWORDPAD },
153 "OSU_1.5alpha3*", SSH_BUG_PASSWORDPAD },
154 { "*SSH_Version_Mapper*",
161 /* process table, return first match */
162 for (i = 0; check[i].pat; i++) {
163 if (match_pattern_list(version, check[i].pat,
164 strlen(check[i].pat), 0) == 1) {
165 debug("match: %s pat %s", version, check[i].pat);
166 datafellows = check[i].bugs;
170 debug("no match: %s", version);
175 proto_spec(const char *spec)
178 int ret = SSH_PROTO_UNKNOWN;
182 q = s = xstrdup(spec);
183 for ((p = strsep(&q, SEP)); p && *p != '\0'; (p = strsep(&q, SEP))) {
186 if (ret == SSH_PROTO_UNKNOWN)
187 ret |= SSH_PROTO_1_PREFERRED;
194 logit("ignoring bad proto spec: '%s'.", p);
203 compat_cipher_proposal(char *cipher_prop)
206 char *orig_prop, *fix_ciphers;
209 if (!(datafellows & SSH_BUG_BIGENDIANAES))
213 tmp = orig_prop = xstrdup(cipher_prop);
214 while ((cp = strsep(&tmp, ",")) != NULL) {
215 if (strncmp(cp, "aes", 3) != 0) {
216 if (buffer_len(&b) > 0)
217 buffer_append(&b, ",", 1);
218 buffer_append(&b, cp, strlen(cp));
221 buffer_append(&b, "\0", 1);
222 fix_ciphers = xstrdup(buffer_ptr(&b));
225 debug2("Original cipher proposal: %s", cipher_prop);
226 debug2("Compat cipher proposal: %s", fix_ciphers);
228 fatal("No available ciphers found.");