Annotation of src/usr.bin/ssh/compat.c, Revision 1.34
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"
1.34 ! markus 26: RCSID("$OpenBSD: compat.c,v 1.33 2001/01/08 22:29:05 markus Exp $");
! 27:
! 28: #include <regex.h>
1.2 markus 29:
1.6 markus 30: #include "packet.h"
1.10 markus 31: #include "xmalloc.h"
32: #include "compat.h"
1.34 ! markus 33: #include "log.h"
1.1 markus 34:
1.4 markus 35: int compat13 = 0;
1.6 markus 36: int compat20 = 0;
37: int datafellows = 0;
1.4 markus 38:
1.11 markus 39: void
1.6 markus 40: enable_compat20(void)
41: {
1.7 markus 42: verbose("Enabling compatibility mode for protocol 2.0");
43: compat20 = 1;
1.6 markus 44: }
1.11 markus 45: void
1.4 markus 46: enable_compat13(void)
47: {
1.3 markus 48: verbose("Enabling compatibility mode for protocol 1.3");
1.4 markus 49: compat13 = 1;
1.6 markus 50: }
51: /* datafellows bug compatibility */
52: void
53: compat_datafellows(const char *version)
54: {
1.24 markus 55: int i, ret;
56: char ebuf[1024];
57: regex_t reg;
58: static struct {
59: char *pat;
1.13 markus 60: int bugs;
61: } check[] = {
1.33 markus 62: { "^OpenSSH[-_]2\\.[012]",
63: SSH_OLD_SESSIONID|SSH_BUG_BANNER },
64: { "^OpenSSH_2\\.3\\.0", SSH_BUG_BANNER },
65: { "^OpenSSH", 0 },
1.25 markus 66: { "MindTerm", 0 },
1.29 markus 67: { "^2\\.1\\.0", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
1.31 markus 68: SSH_OLD_SESSIONID|SSH_BUG_DEBUG },
1.28 markus 69: { "^2\\.0\\.1[3-9]", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
1.31 markus 70: SSH_OLD_SESSIONID|SSH_BUG_DEBUG|
1.28 markus 71: SSH_BUG_PKSERVICE|SSH_BUG_X11FWD },
1.25 markus 72: { "^2\\.0\\.", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
1.31 markus 73: SSH_OLD_SESSIONID|SSH_BUG_DEBUG|
74: SSH_BUG_PKSERVICE|SSH_BUG_X11FWD|
75: SSH_BUG_PKAUTH },
1.29 markus 76: { "^2\\.[23]\\.0", SSH_BUG_HMAC},
1.25 markus 77: { "^2\\.[2-9]\\.", 0 },
1.26 markus 78: { "^2\\.4$", SSH_OLD_SESSIONID}, /* Van Dyke */
79: { "^3\\.0 SecureCRT", SSH_OLD_SESSIONID},
80: { "^1\\.7 SecureFX", SSH_OLD_SESSIONID},
1.25 markus 81: { NULL, 0 }
1.6 markus 82: };
1.21 markus 83: /* process table, return first match */
1.24 markus 84: for (i = 0; check[i].pat; i++) {
85: ret = regcomp(®, check[i].pat, REG_EXTENDED|REG_NOSUB);
86: if (ret != 0) {
87: regerror(ret, ®, ebuf, sizeof(ebuf));
88: ebuf[sizeof(ebuf)-1] = '\0';
89: error("regerror: %s", ebuf);
90: continue;
91: }
92: ret = regexec(®, version, 0, NULL, 0);
93: regfree(®);
94: if (ret == 0) {
1.32 provos 95: debug("match: %s pat %s", version, check[i].pat);
1.13 markus 96: datafellows = check[i].bugs;
1.6 markus 97: return;
98: }
99: }
1.24 markus 100: debug("no match: %s", version);
1.10 markus 101: }
102:
103: #define SEP ","
104: int
105: proto_spec(const char *spec)
106: {
1.18 provos 107: char *s, *p, *q;
1.10 markus 108: int ret = SSH_PROTO_UNKNOWN;
109:
1.14 markus 110: if (spec == NULL)
111: return ret;
1.18 provos 112: q = s = xstrdup(spec);
1.19 ho 113: for ((p = strsep(&q, SEP)); p && *p != '\0'; (p = strsep(&q, SEP))) {
1.10 markus 114: switch(atoi(p)) {
115: case 1:
116: if (ret == SSH_PROTO_UNKNOWN)
117: ret |= SSH_PROTO_1_PREFERRED;
118: ret |= SSH_PROTO_1;
119: break;
120: case 2:
121: ret |= SSH_PROTO_2;
122: break;
123: default:
124: log("ignoring bad proto spec: '%s'.", p);
125: break;
126: }
127: }
128: xfree(s);
129: return ret;
1.1 markus 130: }
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