Annotation of src/usr.bin/ssh/compat.c, Revision 1.31
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"
1.31 ! markus 26: RCSID("$OpenBSD: compat.c,v 1.30 2000/12/03 11:29:04 markus Exp $");
1.2 markus 27:
1.1 markus 28: #include "ssh.h"
1.6 markus 29: #include "packet.h"
1.10 markus 30: #include "xmalloc.h"
31: #include "compat.h"
1.24 markus 32: #include <regex.h>
1.1 markus 33:
1.4 markus 34: int compat13 = 0;
1.6 markus 35: int compat20 = 0;
36: int datafellows = 0;
1.4 markus 37:
1.11 markus 38: void
1.6 markus 39: enable_compat20(void)
40: {
1.7 markus 41: verbose("Enabling compatibility mode for protocol 2.0");
42: compat20 = 1;
1.6 markus 43: }
1.11 markus 44: void
1.4 markus 45: enable_compat13(void)
46: {
1.3 markus 47: verbose("Enabling compatibility mode for protocol 1.3");
1.4 markus 48: compat13 = 1;
1.6 markus 49: }
50: /* datafellows bug compatibility */
51: void
52: compat_datafellows(const char *version)
53: {
1.24 markus 54: int i, ret;
55: char ebuf[1024];
56: regex_t reg;
57: static struct {
58: char *pat;
1.13 markus 59: int bugs;
60: } check[] = {
1.27 markus 61: { "^OpenSSH[-_]2\\.[012]", SSH_OLD_SESSIONID },
1.25 markus 62: { "MindTerm", 0 },
1.29 markus 63: { "^2\\.1\\.0", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
1.31 ! markus 64: SSH_OLD_SESSIONID|SSH_BUG_DEBUG },
1.28 markus 65: { "^2\\.0\\.1[3-9]", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
1.31 ! markus 66: SSH_OLD_SESSIONID|SSH_BUG_DEBUG|
1.28 markus 67: SSH_BUG_PKSERVICE|SSH_BUG_X11FWD },
1.25 markus 68: { "^2\\.0\\.", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
1.31 ! markus 69: SSH_OLD_SESSIONID|SSH_BUG_DEBUG|
! 70: SSH_BUG_PKSERVICE|SSH_BUG_X11FWD|
! 71: SSH_BUG_PKAUTH },
1.29 markus 72: { "^2\\.[23]\\.0", SSH_BUG_HMAC},
1.25 markus 73: { "^2\\.[2-9]\\.", 0 },
1.26 markus 74: { "^2\\.4$", SSH_OLD_SESSIONID}, /* Van Dyke */
75: { "^3\\.0 SecureCRT", SSH_OLD_SESSIONID},
76: { "^1\\.7 SecureFX", SSH_OLD_SESSIONID},
1.25 markus 77: { NULL, 0 }
1.6 markus 78: };
1.21 markus 79: /* process table, return first match */
1.24 markus 80: for (i = 0; check[i].pat; i++) {
81: ret = regcomp(®, check[i].pat, REG_EXTENDED|REG_NOSUB);
82: if (ret != 0) {
83: regerror(ret, ®, ebuf, sizeof(ebuf));
84: ebuf[sizeof(ebuf)-1] = '\0';
85: error("regerror: %s", ebuf);
86: continue;
87: }
88: ret = regexec(®, version, 0, NULL, 0);
89: regfree(®);
90: if (ret == 0) {
91: debug("match: %s pat %s\n", version, check[i].pat);
1.13 markus 92: datafellows = check[i].bugs;
1.6 markus 93: return;
94: }
95: }
1.24 markus 96: debug("no match: %s", version);
1.10 markus 97: }
98:
99: #define SEP ","
100: int
101: proto_spec(const char *spec)
102: {
1.18 provos 103: char *s, *p, *q;
1.10 markus 104: int ret = SSH_PROTO_UNKNOWN;
105:
1.14 markus 106: if (spec == NULL)
107: return ret;
1.18 provos 108: q = s = xstrdup(spec);
1.19 ho 109: for ((p = strsep(&q, SEP)); p && *p != '\0'; (p = strsep(&q, SEP))) {
1.10 markus 110: switch(atoi(p)) {
111: case 1:
112: if (ret == SSH_PROTO_UNKNOWN)
113: ret |= SSH_PROTO_1_PREFERRED;
114: ret |= SSH_PROTO_1;
115: break;
116: case 2:
117: ret |= SSH_PROTO_2;
118: break;
119: default:
120: log("ignoring bad proto spec: '%s'.", p);
121: break;
122: }
123: }
124: xfree(s);
125: return ret;
1.1 markus 126: }