Annotation of src/usr.bin/ssh/compat.c, Revision 1.27.2.3
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"
1.27.2.3! jason 26: RCSID("$OpenBSD: compat.c,v 1.39 2001/03/18 23:30:55 deraadt Exp $");
1.27.2.1 jason 27:
28: #include <regex.h>
1.2 markus 29:
1.6 markus 30: #include "packet.h"
1.10 markus 31: #include "xmalloc.h"
32: #include "compat.h"
1.27.2.1 jason 33: #include "log.h"
1.1 markus 34:
1.4 markus 35: int compat13 = 0;
1.6 markus 36: int compat20 = 0;
37: int datafellows = 0;
1.4 markus 38:
1.11 markus 39: void
1.6 markus 40: enable_compat20(void)
41: {
1.7 markus 42: verbose("Enabling compatibility mode for protocol 2.0");
43: compat20 = 1;
1.6 markus 44: }
1.11 markus 45: void
1.4 markus 46: enable_compat13(void)
47: {
1.3 markus 48: verbose("Enabling compatibility mode for protocol 1.3");
1.4 markus 49: compat13 = 1;
1.6 markus 50: }
51: /* datafellows bug compatibility */
52: void
53: compat_datafellows(const char *version)
54: {
1.24 markus 55: int i, ret;
56: char ebuf[1024];
57: regex_t reg;
58: static struct {
59: char *pat;
1.13 markus 60: int bugs;
61: } check[] = {
1.27.2.1 jason 62: { "^OpenSSH[-_]2\\.[012]",
63: SSH_OLD_SESSIONID|SSH_BUG_BANNER },
64: { "^OpenSSH_2\\.3\\.0", SSH_BUG_BANNER },
65: { "^OpenSSH", 0 },
1.25 markus 66: { "MindTerm", 0 },
1.27.2.1 jason 67: { "^2\\.1\\.0", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
68: SSH_OLD_SESSIONID|SSH_BUG_DEBUG },
1.27.2.3! jason 69: { "^2\\.1 ", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
! 70: SSH_OLD_SESSIONID|SSH_BUG_DEBUG },
1.27.2.1 jason 71: { "^2\\.0\\.1[3-9]", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
72: SSH_OLD_SESSIONID|SSH_BUG_DEBUG|
1.27.2.3! jason 73: SSH_BUG_PKSERVICE|SSH_BUG_X11FWD|
! 74: SSH_BUG_PKOK },
1.25 markus 75: { "^2\\.0\\.", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
1.27.2.1 jason 76: SSH_OLD_SESSIONID|SSH_BUG_DEBUG|
77: SSH_BUG_PKSERVICE|SSH_BUG_X11FWD|
1.27.2.3! jason 78: SSH_BUG_PKAUTH|SSH_BUG_PKOK },
! 79: { "^2\\.[23]\\.0", SSH_BUG_HMAC },
1.25 markus 80: { "^2\\.[2-9]\\.", 0 },
1.27.2.3! jason 81: { "^2\\.4$", SSH_OLD_SESSIONID }, /* Van Dyke */
! 82: { "^3\\.0 SecureCRT", SSH_OLD_SESSIONID },
! 83: { "^1\\.7 SecureFX", SSH_OLD_SESSIONID },
! 84: { "^1\\.2\\.1[89]", SSH_BUG_IGNOREMSG },
! 85: { "^1\\.2\\.2[012]", SSH_BUG_IGNOREMSG },
! 86: { "^SSH Compatible Server", /* Netscreen */
! 87: SSH_BUG_PASSWORDPAD },
! 88: { "^OSU_0", SSH_BUG_PASSWORDPAD },
! 89: { "^OSU_1\\.[0-4]", SSH_BUG_PASSWORDPAD },
! 90: { "^OSU_1\\.5alpha[1-3]",
! 91: SSH_BUG_PASSWORDPAD },
! 92: { "^SSH_Version_Mapper",
! 93: SSH_BUG_SCANNER },
1.25 markus 94: { NULL, 0 }
1.6 markus 95: };
1.21 markus 96: /* process table, return first match */
1.24 markus 97: for (i = 0; check[i].pat; i++) {
98: ret = regcomp(®, check[i].pat, REG_EXTENDED|REG_NOSUB);
99: if (ret != 0) {
100: regerror(ret, ®, ebuf, sizeof(ebuf));
101: ebuf[sizeof(ebuf)-1] = '\0';
102: error("regerror: %s", ebuf);
103: continue;
104: }
105: ret = regexec(®, version, 0, NULL, 0);
106: regfree(®);
107: if (ret == 0) {
1.27.2.1 jason 108: debug("match: %s pat %s", version, check[i].pat);
1.13 markus 109: datafellows = check[i].bugs;
1.6 markus 110: return;
111: }
112: }
1.24 markus 113: debug("no match: %s", version);
1.10 markus 114: }
115:
116: #define SEP ","
117: int
118: proto_spec(const char *spec)
119: {
1.18 provos 120: char *s, *p, *q;
1.10 markus 121: int ret = SSH_PROTO_UNKNOWN;
122:
1.14 markus 123: if (spec == NULL)
124: return ret;
1.18 provos 125: q = s = xstrdup(spec);
1.19 ho 126: for ((p = strsep(&q, SEP)); p && *p != '\0'; (p = strsep(&q, SEP))) {
1.10 markus 127: switch(atoi(p)) {
128: case 1:
129: if (ret == SSH_PROTO_UNKNOWN)
130: ret |= SSH_PROTO_1_PREFERRED;
131: ret |= SSH_PROTO_1;
132: break;
133: case 2:
134: ret |= SSH_PROTO_2;
135: break;
136: default:
137: log("ignoring bad proto spec: '%s'.", p);
138: break;
139: }
140: }
141: xfree(s);
142: return ret;
1.1 markus 143: }
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