Please grep through the source and look for 'ISSUE' comments and verify
that I was able to get all the portable bits in the right location.  As for
the SKEY comment there is an email out to Markus as to how it should be
resolved.  Until then I just #ifdef SKEY/#endif out the whole block.

 - (bal) OpenBSD Resync
   - markus@cvs.openbsd.org 2001/01/18 16:20:21
     [log-client.c log-server.c log.c readconf.c servconf.c ssh.1 ssh.h
      sshd.8 sshd.c]
     log() is at pri=LOG_INFO, since LOG_NOTICE goes to /dev/console on many
     systems
   - markus@cvs.openbsd.org 2001/01/18 16:59:59
     [auth-passwd.c auth.c auth.h auth1.c auth2.c serverloop.c session.c
      session.h sshconnect1.c]
     1) removes fake skey from sshd, since this will be much
        harder with /usr/libexec/auth/login_XXX
     2) share/unify code used in ssh-1 and ssh-2 authentication (server side)
     3) make addition of BSD_AUTH and other challenge reponse methods
        easier.
   - markus@cvs.openbsd.org 2001/01/18 17:12:43
     [auth-chall.c auth2-chall.c]
     rename *-skey.c *-chall.c since the files are not skey specific
diff --git a/auth.h b/auth.h
index 4b029f9..bf4787b 100644
--- a/auth.h
+++ b/auth.h
@@ -21,7 +21,7 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- * $OpenBSD: auth.h,v 1.8 2000/12/28 14:25:51 markus Exp $
+ * $OpenBSD: auth.h,v 1.9 2001/01/18 16:59:59 markus Exp $
  */
 #ifndef AUTH_H
 #define AUTH_H
@@ -29,12 +29,14 @@
 typedef struct Authctxt Authctxt;
 struct Authctxt {
 	int success;
+	int postponed;
 	int valid;
 	int attempt;
 	int failures;
 	char *user;
 	char *service;
 	struct passwd *pw;
+	char *style;
 };
 
 #include "auth-pam.h"
@@ -43,13 +45,20 @@
 void	do_authentication(void);
 void	do_authentication2(void);
 
-void	userauth_log(Authctxt *authctxt, int authenticated, char *method);
+Authctxt *authctxt_new(void);
+void	auth_log(Authctxt *authctxt, int authenticated, char *method, char *info);
 void	userauth_reply(Authctxt *authctxt, int authenticated);
+int	auth_root_allowed(void);
 
-int	auth2_skey(Authctxt *authctxt);
+int	auth2_challenge(Authctxt *authctxt, char *devs);
 
 int	allowed_user(struct passwd * pw);
+
+char	*get_challenge(Authctxt *authctxt, char *devs);
+int	verify_response(Authctxt *authctxt, char *response);
+
 struct passwd * auth_get_user(void);
+struct passwd * pwcopy(struct passwd *pw);
 
 #define AUTH_FAIL_MAX 6
 #define AUTH_FAIL_LOG (AUTH_FAIL_MAX/2)