#error no longer required, dealt with in configure.in now.

[openssh.git] / compat.c

diff --git a/compat.c b/compat.c
index bf4897e19c0497878156fd46f4885e49572d4928..83340993d89bfeb4f4252223ea70efe1cba3571a 100644 (file)
--- a/compat.c
+++ b/compat.c
@@ -1,10 +1,138 @@
+/*
+ * 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("$Id$");
+RCSID("$OpenBSD: compat.c,v 1.34 2001/01/21 19:05:48 markus Exp $");
+
+#ifdef HAVE_LIBPCRE
+#  include <pcreposix.h>
+#else /* Use native regex libraries */
+#  ifdef HAVE_REGEX_H
+#    include <regex.h>
+#  else
+#    include "fake-regex.h"
+#  endif
+#endif /* HAVE_LIBPCRE */
+
+#include "packet.h"
+#include "xmalloc.h"
+#include "compat.h"
+#include "log.h"
+
+int compat13 = 0;
+int compat20 = 0;
+int datafellows = 0;
+
+void
+enable_compat20(void)
+{
+       verbose("Enabling compatibility mode for protocol 2.0");
+       compat20 = 1;
+}
+void
+enable_compat13(void)
+{
+       verbose("Enabling compatibility mode for protocol 1.3");
+       compat13 = 1;
+}
+/* datafellows bug compatibility */
+void
+compat_datafellows(const char *version)
+{
+       int i, ret;
+       char ebuf[1024];
+       regex_t reg;
+       static struct {
+               char    *pat;
+               int     bugs;
+       } check[] = {
+               { "^OpenSSH[-_]2\\.[012]",
+                                       SSH_OLD_SESSIONID|SSH_BUG_BANNER },
+               { "^OpenSSH_2\\.3\\.0", SSH_BUG_BANNER },
+               { "^OpenSSH",           0 },
+               { "MindTerm",           0 },
+               { "^2\\.1\\.0",         SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
+                                       SSH_OLD_SESSIONID|SSH_BUG_DEBUG },
+               { "^2\\.0\\.1[3-9]",    SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
+                                       SSH_OLD_SESSIONID|SSH_BUG_DEBUG|
+                                       SSH_BUG_PKSERVICE|SSH_BUG_X11FWD },
+               { "^2\\.0\\.",          SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
+                                       SSH_OLD_SESSIONID|SSH_BUG_DEBUG|
+                                       SSH_BUG_PKSERVICE|SSH_BUG_X11FWD|
+                                       SSH_BUG_PKAUTH },
+               { "^2\\.[23]\\.0",      SSH_BUG_HMAC},
+               { "^2\\.[2-9]\\.",      0 },
+               { "^2\\.4$",            SSH_OLD_SESSIONID}, /* Van Dyke */
+               { "^3\\.0 SecureCRT",   SSH_OLD_SESSIONID},
+               { "^1\\.7 SecureFX",    SSH_OLD_SESSIONID},
+               { NULL,                 0 }
+       };
+       /* process table, return first match */
+       for (i = 0; check[i].pat; i++) {
+               ret = regcomp(&reg, check[i].pat, REG_EXTENDED|REG_NOSUB);
+               if (ret != 0) {
+                       regerror(ret, &reg, ebuf, sizeof(ebuf));
+                       ebuf[sizeof(ebuf)-1] = '\0';
+                       error("regerror: %s", ebuf);
+                       continue;
+               }
+               ret = regexec(&reg, version, 0, NULL, 0);
+               regfree(&reg);
+               if (ret == 0) {
+                       debug("match: %s pat %s", version, check[i].pat);
+                       datafellows = check[i].bugs;
+                       return;
+               }
+       }
+       debug("no match: %s", version);
+}
 
-#include "ssh.h"
+#define        SEP     ","
+int
+proto_spec(const char *spec)
+{
+       char *s, *p, *q;
+       int ret = SSH_PROTO_UNKNOWN;
 
-int compat13=0;
-void enable_compat13(void){
-       log("Enabling compatibility mode for protocol 1.3");
-       compat13=1;
+       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;
 }