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/*
* Copyright (c) 1999,2000 Markus Friedl. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "includes.h"
RCSID("$OpenBSD: compat.c,v 1.23 2000/09/07 21:13:37 markus Exp $");
#include "ssh.h"
#include "packet.h"
#include "xmalloc.h"
#include "compat.h"
int compat13 = 0;
int compat20 = 0;
int datafellows = 0;
void
enable_compat20(void)
{
verbose("Enabling compatibility mode for protocol 2.0");
compat20 = 1;
}
void
enable_compat13(void)
{
verbose("Enabling compatibility mode for protocol 1.3");
compat13 = 1;
}
/* datafellows bug compatibility */
void
compat_datafellows(const char *version)
{
int i;
size_t len;
struct {
char *version;
int bugs;
} check[] = {
{"2.1.0", SSH_BUG_SIGBLOB|SSH_BUG_HMAC},
{"2.0.1", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|SSH_BUG_PUBKEYAUTH|SSH_BUG_X11FWD},
{"2.", SSH_BUG_HMAC|SSH_COMPAT_SESSIONID_ENCODING},
{NULL, 0}
};
/* process table, return first match */
for (i = 0; check[i].version; i++) {
len = strlen(check[i].version);
if (strlen(version) >= len &&
(strncmp(version, check[i].version, len) == 0)) {
verbose("datafellows: %.200s", version);
datafellows = check[i].bugs;
return;
}
}
}
#define SEP ","
int
proto_spec(const char *spec)
{
char *s, *p, *q;
int ret = SSH_PROTO_UNKNOWN;
if (spec == NULL)
return ret;
q = s = xstrdup(spec);
for ((p = strsep(&q, SEP)); p && *p != '\0'; (p = strsep(&q, SEP))) {
switch(atoi(p)) {
case 1:
if (ret == SSH_PROTO_UNKNOWN)
ret |= SSH_PROTO_1_PREFERRED;
ret |= SSH_PROTO_1;
break;
case 2:
ret |= SSH_PROTO_2;
break;
default:
log("ignoring bad proto spec: '%s'.", p);
break;
}
}
xfree(s);
return ret;
}
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