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[openssh.git] / auth-rhosts.c

diff --git a/auth-rhosts.c b/auth-rhosts.c
index f98df842c219e75aefbe4a37768a4fbf6e814ccf..9ba64dbc3a9d729bd008d1cf77ab3e28ae4adc82 100644 (file)
--- a/auth-rhosts.c
+++ b/auth-rhosts.c
@@ -1,28 +1,32 @@
 /*
- * 
- * auth-rhosts.c
- * 
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
- * 
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
  *                    All rights reserved
- * 
- * Created: Fri Mar 17 05:12:18 1995 ylo
- * 
  * Rhosts authentication.  This file contains code to check whether to admit
  * the login based on rhosts authentication.  This file also processes
  * /etc/hosts.equiv.
- * 
+ *
+ * As far as I am concerned, the code I have written for this software
+ * can be used freely for any purpose.  Any derived versions of this
+ * software must be clearly marked as such, and if the derived work is
+ * incompatible with the protocol description in the RFC file, it must be
+ * called by a name other than "ssh" or "Secure Shell".
  */
 
 #include "includes.h"
-RCSID("$Id$");
+RCSID("$OpenBSD: auth-rhosts.c,v 1.24 2001/06/23 15:12:17 itojun Exp $");
 
 #include "packet.h"
-#include "ssh.h"
 #include "xmalloc.h"
 #include "uidswap.h"
+#include "pathnames.h"
+#include "log.h"
 #include "servconf.h"
+#include "canohost.h"
+#include "auth.h"
+
+/* import */
+extern ServerOptions options;
 
 /*
  * This function processes an rhosts-style file (.rhosts, .shosts, or
@@ -30,7 +34,7 @@ RCSID("$Id$");
  * based on the file, and returns zero otherwise.
  */
 
-int 
+static int
 check_rhosts_file(const char *filename, const char *hostname,
                  const char *ipaddr, const char *client_user,
                  const char *server_user)
@@ -146,18 +150,36 @@ check_rhosts_file(const char *filename, const char *hostname,
  * /etc/hosts.equiv will be considered (.rhosts and .shosts are ignored).
  */
 
-int 
+int
 auth_rhosts(struct passwd *pw, const char *client_user)
 {
-       extern ServerOptions options;
-       char buf[1024];
        const char *hostname, *ipaddr;
+       int ret;
+
+       hostname = get_canonical_hostname(options.reverse_mapping_check);
+       ipaddr = get_remote_ipaddr();
+       ret = auth_rhosts2(pw, client_user, hostname, ipaddr);
+       return ret;
+}
+
+int
+auth_rhosts2(struct passwd *pw, const char *client_user, const char *hostname,
+    const char *ipaddr)
+{
+       char buf[1024];
        struct stat st;
        static const char *rhosts_files[] = {".shosts", ".rhosts", NULL};
-       unsigned int rhosts_file_index;
+       u_int rhosts_file_index;
+
+       debug2("auth_rhosts2: clientuser %s hostname %s ipaddr %s",
+           client_user, hostname, ipaddr);
+
+       /* no user given */
+       if (pw == NULL)
+               return 0;
 
        /* Switch to the user's uid. */
-       temporarily_use_uid(pw->pw_uid);
+       temporarily_use_uid(pw);
        /*
         * Quick check: if the user has no .shosts or .rhosts files, return
         * failure immediately without doing costly lookups from name
@@ -176,25 +198,22 @@ auth_rhosts(struct passwd *pw, const char *client_user)
 
        /* Deny if The user has no .shosts or .rhosts file and there are no system-wide files. */
        if (!rhosts_files[rhosts_file_index] &&
-           stat("/etc/hosts.equiv", &st) < 0 &&
-           stat(SSH_HOSTS_EQUIV, &st) < 0)
+           stat(_PATH_RHOSTS_EQUIV, &st) < 0 &&
+           stat(_PATH_SSH_HOSTS_EQUIV, &st) < 0)
                return 0;
 
-       hostname = get_canonical_hostname();
-       ipaddr = get_remote_ipaddr();
-
        /* If not logging in as superuser, try /etc/hosts.equiv and shosts.equiv. */
        if (pw->pw_uid != 0) {
-               if (check_rhosts_file("/etc/hosts.equiv", hostname, ipaddr, client_user,
+               if (check_rhosts_file(_PATH_RHOSTS_EQUIV, hostname, ipaddr, client_user,
                                      pw->pw_name)) {
                        packet_send_debug("Accepted for %.100s [%.100s] by /etc/hosts.equiv.",
                                          hostname, ipaddr);
                        return 1;
                }
-               if (check_rhosts_file(SSH_HOSTS_EQUIV, hostname, ipaddr, client_user,
+               if (check_rhosts_file(_PATH_SSH_HOSTS_EQUIV, hostname, ipaddr, client_user,
                                      pw->pw_name)) {
                        packet_send_debug("Accepted for %.100s [%.100s] by %.100s.",
-                                     hostname, ipaddr, SSH_HOSTS_EQUIV);
+                                     hostname, ipaddr, _PATH_SSH_HOSTS_EQUIV);
                        return 1;
                }
        }
@@ -205,7 +224,7 @@ auth_rhosts(struct passwd *pw, const char *client_user)
        if (stat(pw->pw_dir, &st) < 0) {
                log("Rhosts authentication refused for %.100s: no home directory %.200s",
                    pw->pw_name, pw->pw_dir);
-               packet_send_debug("Rhosts authentication refused for %.100: no home directory %.200s",
+               packet_send_debug("Rhosts authentication refused for %.100s: no home directory %.200s",
                                  pw->pw_name, pw->pw_dir);
                return 0;
        }
@@ -219,7 +238,7 @@ auth_rhosts(struct passwd *pw, const char *client_user)
                return 0;
        }
        /* Temporarily use the user's uid. */
-       temporarily_use_uid(pw->pw_uid);
+       temporarily_use_uid(pw);
 
        /* Check all .rhosts files (currently .shosts and .rhosts). */
        for (rhosts_file_index = 0; rhosts_files[rhosts_file_index];