Annotation of src/usr.bin/ssh/compat.c, Revision 1.18
1.5 markus 1: /*
2: * Copyright (c) 1999 Markus Friedl. All rights reserved.
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: * 3. All advertising materials mentioning features or use of this software
13: * must display the following acknowledgement:
14: * This product includes software developed by Markus Friedl.
15: * 4. The name of the author may not be used to endorse or promote products
16: * derived from this software without specific prior written permission.
17: *
18: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28: */
29:
1.1 markus 30: #include "includes.h"
1.18 ! provos 31: RCSID("$OpenBSD: compat.c,v 1.17 2000/06/20 01:39:40 markus Exp $");
1.2 markus 32:
1.1 markus 33: #include "ssh.h"
1.6 markus 34: #include "packet.h"
1.10 markus 35: #include "xmalloc.h"
36: #include "compat.h"
1.1 markus 37:
1.4 markus 38: int compat13 = 0;
1.6 markus 39: int compat20 = 0;
40: int datafellows = 0;
1.4 markus 41:
1.11 markus 42: void
1.6 markus 43: enable_compat20(void)
44: {
1.7 markus 45: verbose("Enabling compatibility mode for protocol 2.0");
46: compat20 = 1;
1.6 markus 47: }
1.11 markus 48: void
1.4 markus 49: enable_compat13(void)
50: {
1.3 markus 51: verbose("Enabling compatibility mode for protocol 1.3");
1.4 markus 52: compat13 = 1;
1.6 markus 53: }
54: /* datafellows bug compatibility */
55: void
56: compat_datafellows(const char *version)
57: {
58: int i;
59: size_t len;
1.13 markus 60: struct {
61: char *version;
62: int bugs;
63: } check[] = {
1.16 markus 64: {"2.2.0", SSH_BUG_HMAC|SSH_COMPAT_SESSIONID_ENCODING},
1.13 markus 65: {"2.1.0", SSH_BUG_SIGBLOB|SSH_BUG_HMAC},
66: {"2.0.1", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|SSH_BUG_PUBKEYAUTH|SSH_BUG_X11FWD},
67: {NULL, 0}
1.6 markus 68: };
1.13 markus 69: for (i = 0; check[i].version; i++) {
70: len = strlen(check[i].version);
1.6 markus 71: if (strlen(version) >= len &&
1.13 markus 72: (strncmp(version, check[i].version, len) == 0)) {
1.9 markus 73: verbose("datafellows: %.200s", version);
1.13 markus 74: datafellows = check[i].bugs;
1.6 markus 75: return;
76: }
77: }
1.10 markus 78: }
79:
80: #define SEP ","
81: int
82: proto_spec(const char *spec)
83: {
1.18 ! provos 84: char *s, *p, *q;
1.10 markus 85: int ret = SSH_PROTO_UNKNOWN;
86:
1.14 markus 87: if (spec == NULL)
88: return ret;
1.18 ! provos 89: q = s = xstrdup(spec);
! 90: for ((p = strsep(&q, SEP)); p; (p = strsep(&q, SEP))) {
1.10 markus 91: switch(atoi(p)) {
92: case 1:
93: if (ret == SSH_PROTO_UNKNOWN)
94: ret |= SSH_PROTO_1_PREFERRED;
95: ret |= SSH_PROTO_1;
96: break;
97: case 2:
98: ret |= SSH_PROTO_2;
99: break;
100: default:
101: log("ignoring bad proto spec: '%s'.", p);
102: break;
103: }
104: }
105: xfree(s);
106: return ret;
1.1 markus 107: }