diff options
Diffstat (limited to 'crypto/openssh/compat.c')
| -rw-r--r-- | crypto/openssh/compat.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/crypto/openssh/compat.c b/crypto/openssh/compat.c new file mode 100644 index 0000000..f58e9fa --- /dev/null +++ b/crypto/openssh/compat.c @@ -0,0 +1,125 @@ +/* + * 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("$FreeBSD$"); +RCSID("$OpenBSD: compat.c,v 1.27 2000/10/31 09:31:58 markus Exp $"); + +#include "ssh.h" +#include "packet.h" +#include "xmalloc.h" +#include "compat.h" +#include <regex.h> + +int compat13 = 0; +int compat20 = 0; +int datafellows = 0; + +void +enable_compat20(void) +{ + verbose("Enabling compatibility mode for protocol 2.0"); + compat20 = 1; +} +void +enable_compat13(void) +{ + verbose("Enabling compatibility mode for protocol 1.3"); + compat13 = 1; +} +/* datafellows bug compatibility */ +void +compat_datafellows(const char *version) +{ + int i, ret; + char ebuf[1024]; + regex_t reg; + static struct { + char *pat; + int bugs; + } check[] = { + { "^OpenSSH[-_]2\\.3", 0 }, + { "^OpenSSH[-_]2\\.[012]", SSH_OLD_SESSIONID }, + { "MindTerm", 0 }, + { "^2\\.1\\.0 ", SSH_BUG_SIGBLOB|SSH_BUG_HMAC| + SSH_OLD_SESSIONID }, + { "^2\\.0\\.", SSH_BUG_SIGBLOB|SSH_BUG_HMAC| + SSH_OLD_SESSIONID| + SSH_BUG_PUBKEYAUTH|SSH_BUG_X11FWD }, + { "^2\\.[23]\\.0 ", SSH_BUG_HMAC}, + { "^2\\.[2-9]\\.", 0 }, + { "^2\\.4$", SSH_OLD_SESSIONID}, /* Van Dyke */ + { "^3\\.0 SecureCRT", SSH_OLD_SESSIONID}, + { "^1\\.7 SecureFX", SSH_OLD_SESSIONID}, + { "^2\\.", SSH_BUG_HMAC}, /* XXX fallback */ + { NULL, 0 } + }; + /* process table, return first match */ + for (i = 0; check[i].pat; i++) { + ret = regcomp(®, check[i].pat, REG_EXTENDED|REG_NOSUB); + if (ret != 0) { + regerror(ret, ®, ebuf, sizeof(ebuf)); + ebuf[sizeof(ebuf)-1] = '\0'; + error("regerror: %s", ebuf); + continue; + } + ret = regexec(®, version, 0, NULL, 0); + regfree(®); + if (ret == 0) { + debug("match: %s pat %s\n", version, check[i].pat); + datafellows = check[i].bugs; + return; + } + } + debug("no match: %s", version); +} + +#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; +} |
