Annotation of src/usr.bin/ssh/compat.c, Revision 1.36
1.5 markus 1: /*
1.23 markus 2: * Copyright (c) 1999,2000 Markus Friedl. All rights reserved.
1.5 markus 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: *
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:
1.1 markus 25: #include "includes.h"
1.36 ! markus 26: RCSID("$OpenBSD: compat.c,v 1.35 2001/02/19 09:53:31 markus Exp $");
1.34 markus 27:
28: #include <regex.h>
1.2 markus 29:
1.6 markus 30: #include "packet.h"
1.10 markus 31: #include "xmalloc.h"
32: #include "compat.h"
1.34 markus 33: #include "log.h"
1.1 markus 34:
1.4 markus 35: int compat13 = 0;
1.6 markus 36: int compat20 = 0;
37: int datafellows = 0;
1.4 markus 38:
1.11 markus 39: void
1.6 markus 40: enable_compat20(void)
41: {
1.7 markus 42: verbose("Enabling compatibility mode for protocol 2.0");
43: compat20 = 1;
1.6 markus 44: }
1.11 markus 45: void
1.4 markus 46: enable_compat13(void)
47: {
1.3 markus 48: verbose("Enabling compatibility mode for protocol 1.3");
1.4 markus 49: compat13 = 1;
1.6 markus 50: }
51: /* datafellows bug compatibility */
52: void
53: compat_datafellows(const char *version)
54: {
1.24 markus 55: int i, ret;
56: char ebuf[1024];
57: regex_t reg;
58: static struct {
59: char *pat;
1.13 markus 60: int bugs;
61: } check[] = {
1.33 markus 62: { "^OpenSSH[-_]2\\.[012]",
63: SSH_OLD_SESSIONID|SSH_BUG_BANNER },
64: { "^OpenSSH_2\\.3\\.0", SSH_BUG_BANNER },
65: { "^OpenSSH", 0 },
1.25 markus 66: { "MindTerm", 0 },
1.29 markus 67: { "^2\\.1\\.0", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
1.36 ! markus 68: SSH_OLD_SESSIONID|SSH_BUG_DEBUG },
! 69: { "^2\\.1 ", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
1.31 markus 70: SSH_OLD_SESSIONID|SSH_BUG_DEBUG },
1.28 markus 71: { "^2\\.0\\.1[3-9]", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
1.31 markus 72: SSH_OLD_SESSIONID|SSH_BUG_DEBUG|
1.28 markus 73: SSH_BUG_PKSERVICE|SSH_BUG_X11FWD },
1.25 markus 74: { "^2\\.0\\.", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
1.31 markus 75: SSH_OLD_SESSIONID|SSH_BUG_DEBUG|
76: SSH_BUG_PKSERVICE|SSH_BUG_X11FWD|
77: SSH_BUG_PKAUTH },
1.29 markus 78: { "^2\\.[23]\\.0", SSH_BUG_HMAC},
1.25 markus 79: { "^2\\.[2-9]\\.", 0 },
1.26 markus 80: { "^2\\.4$", SSH_OLD_SESSIONID}, /* Van Dyke */
81: { "^3\\.0 SecureCRT", SSH_OLD_SESSIONID},
82: { "^1\\.7 SecureFX", SSH_OLD_SESSIONID},
1.35 markus 83: { "^1\\.2\\.1[89]", SSH_BUG_IGNOREMSG},
84: { "^1\\.2\\.2[012]", SSH_BUG_IGNOREMSG},
1.25 markus 85: { NULL, 0 }
1.6 markus 86: };
1.21 markus 87: /* process table, return first match */
1.24 markus 88: for (i = 0; check[i].pat; i++) {
89: ret = regcomp(®, check[i].pat, REG_EXTENDED|REG_NOSUB);
90: if (ret != 0) {
91: regerror(ret, ®, ebuf, sizeof(ebuf));
92: ebuf[sizeof(ebuf)-1] = '\0';
93: error("regerror: %s", ebuf);
94: continue;
95: }
96: ret = regexec(®, version, 0, NULL, 0);
97: regfree(®);
98: if (ret == 0) {
1.32 provos 99: debug("match: %s pat %s", version, check[i].pat);
1.13 markus 100: datafellows = check[i].bugs;
1.6 markus 101: return;
102: }
103: }
1.24 markus 104: debug("no match: %s", version);
1.10 markus 105: }
106:
107: #define SEP ","
108: int
109: proto_spec(const char *spec)
110: {
1.18 provos 111: char *s, *p, *q;
1.10 markus 112: int ret = SSH_PROTO_UNKNOWN;
113:
1.14 markus 114: if (spec == NULL)
115: return ret;
1.18 provos 116: q = s = xstrdup(spec);
1.19 ho 117: for ((p = strsep(&q, SEP)); p && *p != '\0'; (p = strsep(&q, SEP))) {
1.10 markus 118: switch(atoi(p)) {
119: case 1:
120: if (ret == SSH_PROTO_UNKNOWN)
121: ret |= SSH_PROTO_1_PREFERRED;
122: ret |= SSH_PROTO_1;
123: break;
124: case 2:
125: ret |= SSH_PROTO_2;
126: break;
127: default:
128: log("ignoring bad proto spec: '%s'.", p);
129: break;
130: }
131: }
132: xfree(s);
133: return ret;
1.1 markus 134: }