/*
- *
- * auth-rh-rsa.c
- *
* Author: Tatu Ylonen <ylo@cs.hut.fi>
- *
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
* All rights reserved
- *
- * Created: Sun May 7 03:08:06 1995 ylo
- *
* Rhosts or /etc/hosts.equiv authentication combined with RSA host
* authentication.
*
+ * 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-rh-rsa.c,v 1.25 2001/06/23 03:04:42 markus Exp $");
#include "packet.h"
-#include "ssh.h"
#include "xmalloc.h"
#include "uidswap.h"
+#include "log.h"
#include "servconf.h"
-
-#include <openssl/rsa.h>
-#include <openssl/dsa.h>
#include "key.h"
#include "hostfile.h"
+#include "pathnames.h"
+#include "auth.h"
+#include "tildexpand.h"
+#include "canohost.h"
/*
* Tries to authenticate the user using the .rhosts file and the host using
extern ServerOptions options;
const char *canonical_hostname;
HostStatus host_status;
- Key *client_key, *found;
+ Key *client_key;
- debug("Trying rhosts with RSA host authentication for %.100s", client_user);
+ debug("Trying rhosts with RSA host authentication for client user %.100s", client_user);
- if (client_host_key == NULL)
+ if (pw == NULL || client_host_key == NULL)
return 0;
/* Check if we would accept it using rhosts authentication. */
if (!auth_rhosts(pw, client_user))
return 0;
- canonical_hostname = get_canonical_hostname();
+ canonical_hostname = get_canonical_hostname(
+ options.reverse_mapping_check);
debug("Rhosts RSA authentication: canonical host %.900s", canonical_hostname);
/* wrap the RSA key into a 'generic' key */
- client_key = key_new(KEY_RSA);
+ client_key = key_new(KEY_RSA1);
BN_copy(client_key->rsa->e, client_host_key->e);
BN_copy(client_key->rsa->n, client_host_key->n);
- found = key_new(KEY_RSA);
- /* Check if we know the host and its host key. */
- host_status = check_host_in_hostfile(SSH_SYSTEM_HOSTFILE, canonical_hostname,
- client_key, found);
+ host_status = check_key_in_hostfiles(pw, client_key, canonical_hostname,
+ _PATH_SSH_SYSTEM_HOSTFILE,
+ options.ignore_user_known_hosts ? NULL : _PATH_SSH_USER_HOSTFILE);
- /* Check user host file unless ignored. */
- if (host_status != HOST_OK && !options.ignore_user_known_hosts) {
- struct stat st;
- char *user_hostfile = tilde_expand_filename(SSH_USER_HOSTFILE, pw->pw_uid);
- /*
- * Check file permissions of SSH_USER_HOSTFILE, auth_rsa()
- * did already check pw->pw_dir, but there is a race XXX
- */
- 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("Rhosts RSA authentication refused for %.100s: bad owner or modes for %.200s",
- pw->pw_name, user_hostfile);
- } else {
- /* XXX race between stat and the following open() */
- temporarily_use_uid(pw->pw_uid);
- host_status = check_host_in_hostfile(user_hostfile, canonical_hostname,
- client_key, found);
- restore_uid();
- }
- xfree(user_hostfile);
- }
key_free(client_key);
- key_free(found);
if (host_status != HOST_OK) {
debug("Rhosts with RSA host authentication denied: unknown or invalid host key");