- markus@cvs.openbsd.org 2001/06/23 00:20:57

     [auth2.c auth.c auth.h auth-rh-rsa.c]
     *known_hosts2 is obsolete for hostbased authentication and
     only used for backward compat. merge ssh1/2 hostkey check
     and move it to auth.c

1 files changed, 42 insertions, 1 deletions

diff --git a/auth.c b/auth.c
index e4f867541..9abcdde1d 100644
--- a/auth.c
+++ b/auth.c
@@ -23,7 +23,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: auth.c,v 1.23 2001/05/24 11:12:42 markus Exp $");
+RCSID("$OpenBSD: auth.c,v 1.24 2001/06/23 00:20:57 markus Exp $");
 
 #ifdef HAVE_LOGIN_H
 #include <login.h>
@@ -46,6 +46,8 @@ RCSID("$OpenBSD: auth.c,v 1.23 2001/05/24 11:12:42 markus Exp $");
 #include "canohost.h"
 #include "buffer.h"
 #include "bufaux.h"
+#include "uidswap.h"
+#include "tildexpand.h"
 
 /* import */
 extern ServerOptions options;
@@ -297,6 +299,45 @@ authorized_keys_file2(struct passwd *pw)
         return expand_filename(options.authorized_keys_file2, pw);
 }
 
+/* return ok if key exists in sysfile or userfile */
+HostStatus
+check_key_in_hostfiles(struct passwd *pw, Key *key, const char *host,
+    const char *sysfile, const char *userfile)
+{
+        Key *found;
+        char *user_hostfile;
+        struct stat st;
+        int host_status;
+
+        /* Check if we know the host and its host key. */
+        found = key_new(key->type);
+        host_status = check_host_in_hostfile(sysfile, host, key, found, NULL);
+
+        if (host_status != HOST_OK && userfile != NULL) {
+                user_hostfile = tilde_expand_filename(userfile, pw->pw_uid);
+                if (options.strict_modes &&
+                    (stat(user_hostfile, &st) == 0) &&
+                    ((st.st_uid != 0 && st.st_uid != pw->pw_uid) ||
+                     (st.st_mode & 022) != 0)) {
+                        log("Authentication refused for %.100s: "
+                            "bad owner or modes for %.200s",
+                            pw->pw_name, user_hostfile);
+                } else {
+                        temporarily_use_uid(pw);
+                        host_status = check_host_in_hostfile(user_hostfile,
+                            host, key, found, NULL);
+                        restore_uid();
+                }
+                xfree(user_hostfile);
+        }
+        key_free(found);
+
+        debug2("check_key_in_hostfiles: key %s for %s", host_status == HOST_OK ?
+            "ok" : "not found", host);
+        return host_status;
+}
+
+
 /*
  * Check a given file for security. This is defined as all components
  * of the path to the file must either be owned by either the owner of