more files needed

6 files changed, 3445 insertions, 0 deletions

diff --git a/usr.bin/telnet/auth.c b/usr.bin/telnet/auth.c
new file mode 100644
index 00000000000..801771e0eb7
--- /dev/null
+++ b/usr.bin/telnet/auth.c
@@ -0,0 +1,664 @@
+/*     $OpenBSD: auth.c,v 1.1 2005/05/24 03:43:56 deraadt Exp $    */
+
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  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.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
+ */
+
+#ifndef lint
+/* from: static char sccsid[] = "@(#)auth.c    8.3 (Berkeley) 5/30/95" */
+/* from: static char *rcsid = "$NetBSD: auth.c,v 1.5 1996/02/24 01:15:17 jtk Exp $"; */
+#endif /* not lint */
+
+/*
+ * This source code is no longer held under any constraint of USA
+ * `cryptographic laws' since it was exported legally.  The cryptographic
+ * functions were removed from the code and a "Bones" distribution was
+ * made.  A Commodity Jurisdiction Request #012-94 was filed with the
+ * USA State Department, who handed it to the Commerce department.  The
+ * code was determined to fall under General License GTDA under ECCN 5D96G,
+ * and hence exportable.  The cryptographic interfaces were re-added by Eric
+ * Young, and then KTH proceeded to maintain the code in the free world.
+ *
+ */
+
+/*
+ * Copyright (C) 1990 by the Massachusetts Institute of Technology
+ *
+ * Export of this software from the United States of America is assumed
+ * to require a specific license from the United States Government.
+ * It is the responsibility of any person or organization contemplating
+ * export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ */
+
+/* "$KTH: auth.c,v 1.23 2000/01/18 03:09:34 assar Exp $" */
+
+#if	defined(AUTHENTICATION)
+#include <stdio.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <signal.h>
+#define	AUTH_NAMES
+#include <arpa/telnet.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "encrypt.h"
+#include "auth.h"
+#include "misc-proto.h"
+#include "auth-proto.h"
+
+#define	typemask(x)		(1<<((x)-1))
+
+#ifdef	KRB4_ENCPWD
+extern krb4encpwd_init();
+extern krb4encpwd_send();
+extern krb4encpwd_is();
+extern krb4encpwd_reply();
+extern krb4encpwd_status();
+extern krb4encpwd_printsub();
+#endif
+
+#ifdef	RSA_ENCPWD
+extern rsaencpwd_init();
+extern rsaencpwd_send();
+extern rsaencpwd_is();
+extern rsaencpwd_reply();
+extern rsaencpwd_status();
+extern rsaencpwd_printsub();
+#endif
+
+int auth_debug_mode = 0;
+int auth_has_failed  = 0;
+int auth_enable_encrypt = 0;
+static 	const	char	*Name = "Noname";
+static	int	Server = 0;
+static	Authenticator	*authenticated = 0;
+static	int	authenticating = 0;
+static	int	validuser = 0;
+static	unsigned char	_auth_send_data[256];
+static	unsigned char	*auth_send_data;
+static	int	auth_send_cnt = 0;
+
+/*
+ * Authentication types supported.  Plese note that these are stored
+ * in priority order, i.e. try the first one first.
+ */
+Authenticator authenticators[] = {
+#ifdef UNSAFE
+    { AUTHTYPE_UNSAFE, AUTH_WHO_CLIENT|AUTH_HOW_ONE_WAY,
+      unsafe_init,
+      unsafe_send,
+      unsafe_is,
+      unsafe_reply,
+      unsafe_status,
+      unsafe_printsub },
+#endif
+#ifdef SRA
+    { AUTHTYPE_SRA, AUTH_WHO_CLIENT|AUTH_HOW_ONE_WAY,
+      sra_init,
+      sra_send,
+      sra_is,
+      sra_reply,
+      sra_status,
+      sra_printsub },
+#endif
+#ifdef	SPX
+    { AUTHTYPE_SPX, AUTH_WHO_CLIENT|AUTH_HOW_MUTUAL,
+      spx_init,
+      spx_send,
+      spx_is,
+      spx_reply,
+      spx_status,
+      spx_printsub },
+    { AUTHTYPE_SPX, AUTH_WHO_CLIENT|AUTH_HOW_ONE_WAY,
+      spx_init,
+      spx_send,
+      spx_is,
+      spx_reply,
+      spx_status,
+      spx_printsub },
+#endif
+#ifdef	KRB5
+    { AUTHTYPE_KERBEROS_V5, AUTH_WHO_CLIENT|AUTH_HOW_MUTUAL,
+      kerberos5_init,
+      kerberos5_send_mutual,
+      kerberos5_is,
+      kerberos5_reply,
+      kerberos5_status,
+      kerberos5_printsub },
+    { AUTHTYPE_KERBEROS_V5, AUTH_WHO_CLIENT|AUTH_HOW_ONE_WAY,
+      kerberos5_init,
+      kerberos5_send_oneway,
+      kerberos5_is,
+      kerberos5_reply,
+      kerberos5_status,
+      kerberos5_printsub },
+#endif
+#ifdef	KRB4
+    { AUTHTYPE_KERBEROS_V4, AUTH_WHO_CLIENT|AUTH_HOW_MUTUAL,
+      kerberos4_init,
+      kerberos4_send_mutual,
+      kerberos4_is,
+      kerberos4_reply,
+      kerberos4_status,
+      kerberos4_printsub },
+    { AUTHTYPE_KERBEROS_V4, AUTH_WHO_CLIENT|AUTH_HOW_ONE_WAY,
+      kerberos4_init,
+      kerberos4_send_oneway,
+      kerberos4_is,
+      kerberos4_reply,
+      kerberos4_status,
+      kerberos4_printsub },
+#endif
+#ifdef	KRB4_ENCPWD
+    { AUTHTYPE_KRB4_ENCPWD, AUTH_WHO_CLIENT|AUTH_HOW_MUTUAL,
+      krb4encpwd_init,
+      krb4encpwd_send,
+      krb4encpwd_is,
+      krb4encpwd_reply,
+      krb4encpwd_status,
+      krb4encpwd_printsub },
+#endif
+#ifdef	RSA_ENCPWD
+    { AUTHTYPE_RSA_ENCPWD, AUTH_WHO_CLIENT|AUTH_HOW_ONE_WAY,
+      rsaencpwd_init,
+      rsaencpwd_send,
+      rsaencpwd_is,
+      rsaencpwd_reply,
+      rsaencpwd_status,
+      rsaencpwd_printsub },
+#endif
+    { 0, },
+};
+
+static Authenticator NoAuth = { 0 };
+
+static int	i_support = 0;
+static int	i_wont_support = 0;
+
+Authenticator *
+findauthenticator(int type, int way)
+{
+    Authenticator *ap = authenticators;
+
+    while (ap->type && (ap->type != type || ap->way != way))
+	++ap;
+    return(ap->type ? ap : 0);
+}
+
+void
+auth_init(const char *name, int server)
+{
+    Authenticator *ap = authenticators;
+
+    Server = server;
+    Name = name;
+
+    i_support = 0;
+    authenticated = 0;
+    authenticating = 0;
+    while (ap->type) {
+	if (!ap->init || (*ap->init)(ap, server)) {
+	    i_support |= typemask(ap->type);
+	    if (auth_debug_mode)
+		printf(">>>%s: I support auth type %d %d\r\n",
+		       Name,
+		       ap->type, ap->way);
+	}
+	else if (auth_debug_mode)
+	    printf(">>>%s: Init failed: auth type %d %d\r\n",
+		   Name, ap->type, ap->way);
+	++ap;
+    }
+}
+
+void
+auth_disable_name(char *name)
+{
+    int x;
+    for (x = 0; x < AUTHTYPE_CNT; ++x) {
+	if (!strcasecmp(name, AUTHTYPE_NAME(x))) {
+	    i_wont_support |= typemask(x);
+	    break;
+	}
+    }
+}
+
+int
+getauthmask(char *type, int *maskp)
+{
+    int x;
+
+    if (!strcasecmp(type, AUTHTYPE_NAME(0))) {
+	*maskp = -1;
+	return(1);
+    }
+
+    for (x = 1; x < AUTHTYPE_CNT; ++x) {
+	if (!strcasecmp(type, AUTHTYPE_NAME(x))) {
+	    *maskp = typemask(x);
+	    return(1);
+	}
+    }
+    return(0);
+}
+
+int
+auth_enable(char *type)
+{
+    return(auth_onoff(type, 1));
+}
+
+int
+auth_disable(char *type)
+{
+    return(auth_onoff(type, 0));
+}
+
+int
+auth_onoff(char *type, int on)
+{
+    int i, mask = -1;
+    Authenticator *ap;
+
+    if (!strcasecmp(type, "?") || !strcasecmp(type, "help")) {
+	printf("auth %s 'type'\n", on ? "enable" : "disable");
+	printf("Where 'type' is one of:\n");
+	printf("\t%s\n", AUTHTYPE_NAME(0));
+	mask = 0;
+	for (ap = authenticators; ap->type; ap++) {
+	    if ((mask & (i = typemask(ap->type))) != 0)
+		continue;
+	    mask |= i;
+	    printf("\t%s\n", AUTHTYPE_NAME(ap->type));
+	}
+	return(0);
+    }
+
+    if (!getauthmask(type, &mask)) {
+	printf("%s: invalid authentication type\n", type);
+	return(0);
+    }
+    if (on)
+	i_wont_support &= ~mask;
+    else
+	i_wont_support |= mask;
+    return(1);
+}
+
+int
+auth_togdebug(int on)
+{
+    if (on < 0)
+	auth_debug_mode ^= 1;
+    else
+	auth_debug_mode = on;
+    printf("auth debugging %s\n", auth_debug_mode ? "enabled" : "disabled");
+    return(1);
+}
+
+int
+auth_status(void)
+{
+    Authenticator *ap;
+    int i, mask;
+
+    if (i_wont_support == -1)
+	printf("Authentication disabled\n");
+    else
+	printf("Authentication enabled\n");
+
+    mask = 0;
+    for (ap = authenticators; ap->type; ap++) {
+	if ((mask & (i = typemask(ap->type))) != 0)
+	    continue;
+	mask |= i;
+	printf("%s: %s\n", AUTHTYPE_NAME(ap->type),
+	       (i_wont_support & typemask(ap->type)) ?
+	       "disabled" : "enabled");
+    }
+    return(1);
+}
+
+/*
+ * This routine is called by the server to start authentication
+ * negotiation.
+ */
+void
+auth_request(void)
+{
+    static unsigned char str_request[64] = { IAC, SB,
+					     TELOPT_AUTHENTICATION,
+					     TELQUAL_SEND, };
+    Authenticator *ap = authenticators;
+    unsigned char *e = str_request + 4;
+
+    if (!authenticating) {
+	authenticating = 1;
+	while (ap->type) {
+	    if (i_support & ~i_wont_support & typemask(ap->type)) {
+		if (auth_debug_mode) {
+		    printf(">>>%s: Sending type %d %d\r\n",
+			   Name, ap->type, ap->way);
+		}
+		*e++ = ap->type;
+		*e++ = ap->way;
+	    }
+	    ++ap;
+	}
+	*e++ = IAC;
+	*e++ = SE;
+	telnet_net_write(str_request, e - str_request);
+	printsub('>', &str_request[2], e - str_request - 2);
+    }
+}
+
+/*
+ * This is called when an AUTH SEND is received.
+ * It should never arrive on the server side (as only the server can
+ * send an AUTH SEND).
+ * You should probably respond to it if you can...
+ *
+ * If you want to respond to the types out of order (i.e. even
+ * if he sends  LOGIN KERBEROS and you support both, you respond
+ * with KERBEROS instead of LOGIN (which is against what the
+ * protocol says)) you will have to hack this code...
+ */
+void
+auth_send(unsigned char *data, int cnt)
+{
+    Authenticator *ap;
+    static unsigned char str_none[] = { IAC, SB, TELOPT_AUTHENTICATION,
+					TELQUAL_IS, AUTHTYPE_NULL, 0,
+					IAC, SE };
+    if (Server) {
+	if (auth_debug_mode) {
+	    printf(">>>%s: auth_send called!\r\n", Name);
+	}
+	return;
+    }
+
+    if (auth_debug_mode) {
+	printf(">>>%s: auth_send got:", Name);
+	printd(data, cnt); printf("\r\n");
+    }
+
+    /*
+     * Save the data, if it is new, so that we can continue looking
+     * at it if the authorization we try doesn't work
+     */
+    if (data < _auth_send_data ||
+	data > _auth_send_data + sizeof(_auth_send_data)) {
+	auth_send_cnt = cnt > sizeof(_auth_send_data)
+	    ? sizeof(_auth_send_data)
+	    : cnt;
+	memmove(_auth_send_data, data, auth_send_cnt);
+	auth_send_data = _auth_send_data;
+    } else {
+	/*
+	 * This is probably a no-op, but we just make sure
+	 */
+	auth_send_data = data;
+	auth_send_cnt = cnt;
+    }
+    while ((auth_send_cnt -= 2) >= 0) {
+	if (auth_debug_mode)
+	    printf(">>>%s: He supports %d\r\n",
+		   Name, *auth_send_data);
+	if ((i_support & ~i_wont_support) & typemask(*auth_send_data)) {
+	    ap = findauthenticator(auth_send_data[0],
+				   auth_send_data[1]);
+	    if (ap && ap->send) {
+		if (auth_debug_mode)
+		    printf(">>>%s: Trying %d %d\r\n",
+			   Name, auth_send_data[0],
+			   auth_send_data[1]);
+		if ((*ap->send)(ap)) {
+		    /*
+		     * Okay, we found one we like
+		     * and did it.
+		     * we can go home now.
+		     */
+		    if (auth_debug_mode)
+			printf(">>>%s: Using type %d\r\n",
+			       Name, *auth_send_data);
+		    auth_send_data += 2;
+		    return;
+		}
+	    }
+	    /* else
+	     *	just continue on and look for the
+	     *	next one if we didn't do anything.
+	     */
+	}
+	auth_send_data += 2;
+    }
+    telnet_net_write(str_none, sizeof(str_none));
+    printsub('>', &str_none[2], sizeof(str_none) - 2);
+    if (auth_debug_mode)
+	printf(">>>%s: Sent failure message\r\n", Name);
+    auth_finished(0, AUTH_REJECT);
+    auth_has_failed = 1;
+#ifdef KANNAN
+    /*
+     *  We requested strong authentication, however no mechanisms worked.
+     *  Therefore, exit on client end.
+     */
+    printf("Unable to securely authenticate user ... exit\n");
+    exit(0);
+#endif /* KANNAN */
+}
+
+void
+auth_send_retry(void)
+{
+    /*
+     * if auth_send_cnt <= 0 then auth_send will end up rejecting
+     * the authentication and informing the other side of this.
+	 */
+    auth_send(auth_send_data, auth_send_cnt);
+}
+
+void
+auth_is(unsigned char *data, int cnt)
+{
+    Authenticator *ap;
+
+    if (cnt < 2)
+	return;
+
+    if (data[0] == AUTHTYPE_NULL) {
+	auth_finished(0, AUTH_REJECT);
+	return;
+    }
+
+    if ((ap = findauthenticator(data[0], data[1]))) {
+	if (ap->is)
+	    (*ap->is)(ap, data+2, cnt-2);
+    } else if (auth_debug_mode)
+	printf(">>>%s: Invalid authentication in IS: %d\r\n",
+	       Name, *data);
+}
+
+void
+auth_reply(unsigned char *data, int cnt)
+{
+    Authenticator *ap;
+
+    if (cnt < 2)
+	return;
+
+    if ((ap = findauthenticator(data[0], data[1]))) {
+	if (ap->reply)
+	    (*ap->reply)(ap, data+2, cnt-2);
+    } else if (auth_debug_mode)
+	printf(">>>%s: Invalid authentication in SEND: %d\r\n",
+	       Name, *data);
+}
+
+void
+auth_name(unsigned char *data, int cnt)
+{
+    char savename[256];
+
+    if (cnt < 1) {
+	if (auth_debug_mode)
+	    printf(">>>%s: Empty name in NAME\r\n", Name);
+	return;
+    }
+    if (cnt > sizeof(savename) - 1) {
+	if (auth_debug_mode)
+	    printf(">>>%s: Name in NAME (%d) exceeds %lu length\r\n",
+		   Name, cnt, (unsigned long)(sizeof(savename)-1));
+	return;
+    }
+    memmove(savename, data, cnt);
+    savename[cnt] = '\0';	/* Null terminate */
+    if (auth_debug_mode)
+	printf(">>>%s: Got NAME [%s]\r\n", Name, savename);
+    auth_encrypt_user(savename);
+}
+
+int
+auth_sendname(unsigned char *cp, int len)
+{
+    static unsigned char str_request[256+6]
+	= { IAC, SB, TELOPT_AUTHENTICATION, TELQUAL_NAME, };
+    unsigned char *e = str_request + 4;
+    unsigned char *ee = &str_request[sizeof(str_request)-2];
+
+    while (--len >= 0) {
+	if ((*e++ = *cp++) == IAC)
+	    *e++ = IAC;
+	if (e >= ee)
+	    return(0);
+    }
+    *e++ = IAC;
+    *e++ = SE;
+    telnet_net_write(str_request, e - str_request);
+    printsub('>', &str_request[2], e - &str_request[2]);
+    return(1);
+}
+
+void
+auth_finished(Authenticator *ap, int result)
+{
+    if (!(authenticated = ap))
+	authenticated = &NoAuth;
+    validuser = result;
+}
+
+/* ARGSUSED */
+static void
+auth_intr(int sig)
+{
+    auth_finished(0, AUTH_REJECT);
+}
+
+int
+auth_wait(char *name, size_t name_sz)
+{
+    if (auth_debug_mode)
+	printf(">>>%s: in auth_wait.\r\n", Name);
+
+    if (Server && !authenticating)
+	return(0);
+
+    signal(SIGALRM, auth_intr);
+    alarm(30);
+    while (!authenticated)
+	if (telnet_spin())
+	    break;
+    alarm(0);
+    signal(SIGALRM, SIG_DFL);
+
+    /*
+     * Now check to see if the user is valid or not
+     */
+    if (!authenticated || authenticated == &NoAuth)
+	return(AUTH_REJECT);
+
+    if (validuser == AUTH_VALID)
+	validuser = AUTH_USER;
+
+    if (authenticated->status)
+	validuser = (*authenticated->status)(authenticated,
+					     name, name_sz,
+					     validuser);
+    return(validuser);
+}
+
+void
+auth_debug(int mode)
+{
+    auth_debug_mode = mode;
+}
+
+void
+auth_printsub(unsigned char *data, int cnt, unsigned char *buf, int buflen)
+{
+    Authenticator *ap;
+
+    if ((ap = findauthenticator(data[1], data[2])) && ap->printsub)
+	(*ap->printsub)(data, cnt, buf, buflen);
+    else
+	auth_gen_printsub(data, cnt, buf, buflen);
+}
+
+void
+auth_gen_printsub(unsigned char *data, int cnt, unsigned char *buf, int buflen)
+{
+    unsigned char *cp;
+    unsigned char tbuf[16];
+
+    cnt -= 3;
+    data += 3;
+    buf[buflen-1] = '\0';
+    buf[buflen-2] = '*';
+    buflen -= 2;
+    for (; cnt > 0; cnt--, data++) {
+	snprintf(tbuf, sizeof(tbuf), " %d", *data);
+	for (cp = tbuf; *cp && buflen > 0; --buflen)
+	    *buf++ = *cp++;
+	if (buflen <= 0)
+	    return;
+    }
+    *buf = '\0';
+}
+#endif
diff --git a/usr.bin/telnet/enc_des.c b/usr.bin/telnet/enc_des.c
new file mode 100644
index 00000000000..06ff59b4fd4
--- /dev/null
+++ b/usr.bin/telnet/enc_des.c
@@ -0,0 +1,660 @@
+/*     $OpenBSD: enc_des.c,v 1.1 2005/05/24 03:43:56 deraadt Exp $ */
+
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  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.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
+ */
+
+/* $KTH: enc_des.c,v 1.16 1998/07/09 23:16:23 assar Exp $ */
+
+#if	defined(AUTHENTICATION) && defined(ENCRYPTION) && defined(DES_ENCRYPTION)
+#include <arpa/telnet.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "encrypt.h"
+#include "misc-proto.h"
+#include <des.h>
+
+extern int encrypt_debug_mode;
+
+#define	CFB	0
+#define	OFB	1
+
+#define	NO_SEND_IV	1
+#define	NO_RECV_IV	2
+#define	NO_KEYID	4
+#define	IN_PROGRESS	(NO_SEND_IV|NO_RECV_IV|NO_KEYID)
+#define	SUCCESS		0
+#define	FAILED		-1
+
+
+struct stinfo {
+  des_cblock	str_output;
+  des_cblock	str_feed;
+  des_cblock	str_iv;
+  des_cblock	str_ikey;
+  des_key_schedule str_sched;
+  int		str_index;
+  int		str_flagshift;
+};
+
+struct fb {
+	des_cblock krbdes_key;
+	des_key_schedule krbdes_sched;
+	des_cblock temp_feed;
+	unsigned char fb_feed[64];
+	int need_start;
+	int state[2];
+	int keyid[2];
+	int once;
+	struct stinfo streams[2];
+};
+
+static struct fb fb[2];
+
+struct keyidlist {
+	char	*keyid;
+	int	keyidlen;
+	char	*key;
+	int	keylen;
+	int	flags;
+} keyidlist [] = {
+	{ "\0", 1, 0, 0, 0 },		/* default key of zero */
+	{ 0, 0, 0, 0, 0 }
+};
+
+#define	KEYFLAG_MASK	03
+
+#define	KEYFLAG_NOINIT	00
+#define	KEYFLAG_INIT	01
+#define	KEYFLAG_OK	02
+#define	KEYFLAG_BAD	03
+
+#define	KEYFLAG_SHIFT	2
+
+#define	SHIFT_VAL(a,b)	(KEYFLAG_SHIFT*((a)+((b)*2)))
+
+#define	FB64_IV		1
+#define	FB64_IV_OK	2
+#define	FB64_IV_BAD	3
+
+
+void fb64_stream_iv (des_cblock, struct stinfo *);
+void fb64_init (struct fb *);
+static int fb64_start (struct fb *, int, int);
+int fb64_is (unsigned char *, int, struct fb *);
+int fb64_reply (unsigned char *, int, struct fb *);
+static void fb64_session (Session_Key *, int, struct fb *);
+void fb64_stream_key (des_cblock, struct stinfo *);
+int fb64_keyid (int, unsigned char *, int *, struct fb *);
+
+void cfb64_init(int server)
+{
+	fb64_init(&fb[CFB]);
+	fb[CFB].fb_feed[4] = ENCTYPE_DES_CFB64;
+	fb[CFB].streams[0].str_flagshift = SHIFT_VAL(0, CFB);
+	fb[CFB].streams[1].str_flagshift = SHIFT_VAL(1, CFB);
+}
+
+
+void ofb64_init(int server)
+{
+	fb64_init(&fb[OFB]);
+	fb[OFB].fb_feed[4] = ENCTYPE_DES_OFB64;
+	fb[CFB].streams[0].str_flagshift = SHIFT_VAL(0, OFB);
+	fb[CFB].streams[1].str_flagshift = SHIFT_VAL(1, OFB);
+}
+
+void fb64_init(struct fb *fbp)
+{
+	memset(fbp,0, sizeof(*fbp));
+	fbp->state[0] = fbp->state[1] = FAILED;
+	fbp->fb_feed[0] = IAC;
+	fbp->fb_feed[1] = SB;
+	fbp->fb_feed[2] = TELOPT_ENCRYPT;
+	fbp->fb_feed[3] = ENCRYPT_IS;
+}
+
+/*
+ * Returns:
+ *	-1: some error.  Negotiation is done, encryption not ready.
+ *	 0: Successful, initial negotiation all done.
+ *	 1: successful, negotiation not done yet.
+ *	 2: Not yet.  Other things (like getting the key from
+ *	    Kerberos) have to happen before we can continue.
+ */
+int cfb64_start(int dir, int server)
+{
+	return(fb64_start(&fb[CFB], dir, server));
+}
+
+int ofb64_start(int dir, int server)
+{
+	return(fb64_start(&fb[OFB], dir, server));
+}
+
+static int fb64_start(struct fb *fbp, int dir, int server)
+{
+	int x;
+	unsigned char *p;
+	int state;
+
+	switch (dir) {
+	case DIR_DECRYPT:
+		/*
+		 * This is simply a request to have the other side
+		 * start output (our input).  He will negotiate an
+		 * IV so we need not look for it.
+		 */
+		state = fbp->state[dir-1];
+		if (state == FAILED)
+			state = IN_PROGRESS;
+		break;
+
+	case DIR_ENCRYPT:
+		state = fbp->state[dir-1];
+		if (state == FAILED)
+			state = IN_PROGRESS;
+		else if ((state & NO_SEND_IV) == 0) {
+			break;
+		}
+
+		if (!VALIDKEY(fbp->krbdes_key)) {
+		        fbp->need_start = 1;
+			break;
+		}
+
+		state &= ~NO_SEND_IV;
+		state |= NO_RECV_IV;
+		if (encrypt_debug_mode)
+			printf("Creating new feed\r\n");
+		/*
+		 * Create a random feed and send it over.
+		 */
+#ifndef OLD_DES_RANDOM_KEY
+		des_new_random_key(&fbp->temp_feed);
+#else
+		/*
+		 * From des_cryp.man "If the des_check_key flag is non-zero,
+		 *  des_set_key will check that the key passed is
+		 *  of odd parity and is not a week or semi-weak key."
+		 */
+		do {
+			des_random_key(fbp->temp_feed);
+			des_set_odd_parity(fbp->temp_feed);
+		} while (des_is_weak_key(fbp->temp_feed));
+#endif
+		des_ecb_encrypt(&fbp->temp_feed,
+				&fbp->temp_feed,
+				fbp->krbdes_sched, 1);
+		p = fbp->fb_feed + 3;
+		*p++ = ENCRYPT_IS;
+		p++;
+		*p++ = FB64_IV;
+		for (x = 0; x < sizeof(des_cblock); ++x) {
+			if ((*p++ = fbp->temp_feed[x]) == IAC)
+				*p++ = IAC;
+		}
+		*p++ = IAC;
+		*p++ = SE;
+		printsub('>', &fbp->fb_feed[2], p - &fbp->fb_feed[2]);
+		telnet_net_write(fbp->fb_feed, p - fbp->fb_feed);
+		break;
+	default:
+		return(FAILED);
+	}
+	return(fbp->state[dir-1] = state);
+}
+
+/*
+ * Returns:
+ *	-1: some error.  Negotiation is done, encryption not ready.
+ *	 0: Successful, initial negotiation all done.
+ *	 1: successful, negotiation not done yet.
+ */
+
+int cfb64_is(unsigned char *data, int cnt)
+{
+	return(fb64_is(data, cnt, &fb[CFB]));
+}
+
+int ofb64_is(unsigned char *data, int cnt)
+{
+	return(fb64_is(data, cnt, &fb[OFB]));
+}
+
+
+int fb64_is(unsigned char *data, int cnt, struct fb *fbp)
+{
+	unsigned char *p;
+	int state = fbp->state[DIR_DECRYPT-1];
+
+	if (cnt-- < 1)
+		goto failure;
+
+	switch (*data++) {
+	case FB64_IV:
+		if (cnt != sizeof(des_cblock)) {
+			if (encrypt_debug_mode)
+				printf("CFB64: initial vector failed on size\r\n");
+			state = FAILED;
+			goto failure;
+		}
+
+		if (encrypt_debug_mode)
+			printf("CFB64: initial vector received\r\n");
+
+		if (encrypt_debug_mode)
+			printf("Initializing Decrypt stream\r\n");
+
+		fb64_stream_iv(data, &fbp->streams[DIR_DECRYPT-1]);
+
+		p = fbp->fb_feed + 3;
+		*p++ = ENCRYPT_REPLY;
+		p++;
+		*p++ = FB64_IV_OK;
+		*p++ = IAC;
+		*p++ = SE;
+		printsub('>', &fbp->fb_feed[2], p - &fbp->fb_feed[2]);
+		telnet_net_write(fbp->fb_feed, p - fbp->fb_feed);
+
+		state = fbp->state[DIR_DECRYPT-1] = IN_PROGRESS;
+		break;
+
+	default:
+		if (encrypt_debug_mode) {
+			printf("Unknown option type: %d\r\n", *(data-1));
+			printd(data, cnt);
+			printf("\r\n");
+		}
+		/* FALL THROUGH */
+	failure:
+		/*
+		 * We failed.  Send an FB64_IV_BAD option
+		 * to the other side so it will know that
+		 * things failed.
+		 */
+		p = fbp->fb_feed + 3;
+		*p++ = ENCRYPT_REPLY;
+		p++;
+		*p++ = FB64_IV_BAD;
+		*p++ = IAC;
+		*p++ = SE;
+		printsub('>', &fbp->fb_feed[2], p - &fbp->fb_feed[2]);
+		telnet_net_write(fbp->fb_feed, p - fbp->fb_feed);
+
+		break;
+	}
+	return(fbp->state[DIR_DECRYPT-1] = state);
+}
+
+/*
+ * Returns:
+ *	-1: some error.  Negotiation is done, encryption not ready.
+ *	 0: Successful, initial negotiation all done.
+ *	 1: successful, negotiation not done yet.
+ */
+
+int cfb64_reply(unsigned char *data, int cnt)
+{
+	return(fb64_reply(data, cnt, &fb[CFB]));
+}
+
+int ofb64_reply(unsigned char *data, int cnt)
+{
+	return(fb64_reply(data, cnt, &fb[OFB]));
+}
+
+
+int fb64_reply(unsigned char *data, int cnt, struct fb *fbp)
+{
+	int state = fbp->state[DIR_ENCRYPT-1];
+
+	if (cnt-- < 1)
+		goto failure;
+
+	switch (*data++) {
+	case FB64_IV_OK:
+		fb64_stream_iv(fbp->temp_feed, &fbp->streams[DIR_ENCRYPT-1]);
+		if (state == FAILED)
+			state = IN_PROGRESS;
+		state &= ~NO_RECV_IV;
+		encrypt_send_keyid(DIR_ENCRYPT, (unsigned char *)"\0", 1, 1);
+		break;
+
+	case FB64_IV_BAD:
+		memset(fbp->temp_feed, 0, sizeof(des_cblock));
+		fb64_stream_iv(fbp->temp_feed, &fbp->streams[DIR_ENCRYPT-1]);
+		state = FAILED;
+		break;
+
+	default:
+		if (encrypt_debug_mode) {
+			printf("Unknown option type: %d\r\n", data[-1]);
+			printd(data, cnt);
+			printf("\r\n");
+		}
+		/* FALL THROUGH */
+	failure:
+		state = FAILED;
+		break;
+	}
+	return(fbp->state[DIR_ENCRYPT-1] = state);
+}
+
+void cfb64_session(Session_Key *key, int server)
+{
+	fb64_session(key, server, &fb[CFB]);
+}
+
+void ofb64_session(Session_Key *key, int server)
+{
+	fb64_session(key, server, &fb[OFB]);
+}
+
+static void fb64_session(Session_Key *key, int server, struct fb *fbp)
+{
+
+	if (!key || key->type != SK_DES) {
+		if (encrypt_debug_mode)
+			printf("Can't set krbdes's session key (%d != %d)\r\n",
+				key ? key->type : -1, SK_DES);
+		return;
+	}
+	memcpy(fbp->krbdes_key, key->data, sizeof(des_cblock));
+
+	fb64_stream_key(fbp->krbdes_key, &fbp->streams[DIR_ENCRYPT-1]);
+	fb64_stream_key(fbp->krbdes_key, &fbp->streams[DIR_DECRYPT-1]);
+
+	if (fbp->once == 0) {
+#ifndef OLD_DES_RANDOM_KEY
+		des_init_random_number_generator(&fbp->krbdes_key);
+#endif
+		fbp->once = 1;
+	}
+	des_key_sched(&fbp->krbdes_key, fbp->krbdes_sched);
+	/*
+	 * Now look to see if krbdes_start() was was waiting for
+	 * the key to show up.  If so, go ahead an call it now
+	 * that we have the key.
+	 */
+	if (fbp->need_start) {
+		fbp->need_start = 0;
+		fb64_start(fbp, DIR_ENCRYPT, server);
+	}
+}
+
+/*
+ * We only accept a keyid of 0.  If we get a keyid of
+ * 0, then mark the state as SUCCESS.
+ */
+
+int cfb64_keyid(int dir, unsigned char *kp, int *lenp)
+{
+	return(fb64_keyid(dir, kp, lenp, &fb[CFB]));
+}
+
+int ofb64_keyid(int dir, unsigned char *kp, int *lenp)
+{
+	return(fb64_keyid(dir, kp, lenp, &fb[OFB]));
+}
+
+int fb64_keyid(int dir, unsigned char *kp, int *lenp, struct fb *fbp)
+{
+	int state = fbp->state[dir-1];
+
+	if (*lenp != 1 || (*kp != '\0')) {
+		*lenp = 0;
+		return(state);
+	}
+
+	if (state == FAILED)
+		state = IN_PROGRESS;
+
+	state &= ~NO_KEYID;
+
+	return(fbp->state[dir-1] = state);
+}
+
+void fb64_printsub(unsigned char *data, int cnt, 
+		   unsigned char *buf, int buflen, char *type)
+{
+	char lbuf[32];
+	int i;
+	char *cp;
+
+	buf[buflen-1] = '\0';		/* make sure it's NULL terminated */
+	buflen -= 1;
+
+	switch(data[2]) {
+	case FB64_IV:
+		snprintf(lbuf, sizeof(lbuf), "%s_IV", type);
+		cp = lbuf;
+		goto common;
+
+	case FB64_IV_OK:
+		snprintf(lbuf, sizeof(lbuf), "%s_IV_OK", type);
+		cp = lbuf;
+		goto common;
+
+	case FB64_IV_BAD:
+		snprintf(lbuf, sizeof(lbuf), "%s_IV_BAD", type);
+		cp = lbuf;
+		goto common;
+
+	default:
+		snprintf(lbuf, sizeof(lbuf), " %d (unknown)", data[2]);
+		cp = lbuf;
+	common:
+		for (; (buflen > 0) && (*buf = *cp++); buf++)
+			buflen--;
+		for (i = 3; i < cnt; i++) {
+			snprintf(lbuf, sizeof(lbuf), " %d", data[i]);
+			for (cp = lbuf; (buflen > 0) && (*buf = *cp++); buf++)
+				buflen--;
+		}
+		break;
+	}
+}
+
+void cfb64_printsub(unsigned char *data, int cnt, 
+		    unsigned char *buf, int buflen)
+{
+	fb64_printsub(data, cnt, buf, buflen, "CFB64");
+}
+
+void ofb64_printsub(unsigned char *data, int cnt,
+		    unsigned char *buf, int buflen)
+{
+	fb64_printsub(data, cnt, buf, buflen, "OFB64");
+}
+
+void fb64_stream_iv(des_cblock seed, struct stinfo *stp)
+{
+
+	memcpy(stp->str_iv, seed,sizeof(des_cblock));
+	memcpy(stp->str_output, seed, sizeof(des_cblock));
+
+	des_key_sched(&stp->str_ikey, stp->str_sched);
+
+	stp->str_index = sizeof(des_cblock);
+}
+
+void fb64_stream_key(des_cblock key, struct stinfo *stp)
+{
+	memcpy(stp->str_ikey, key, sizeof(des_cblock));
+	des_key_sched((des_cblock*)key, stp->str_sched);
+
+	memcpy(stp->str_output, stp->str_iv, sizeof(des_cblock));
+
+	stp->str_index = sizeof(des_cblock);
+}
+
+/*
+ * DES 64 bit Cipher Feedback
+ *
+ *     key --->+-----+
+ *          +->| DES |--+
+ *          |  +-----+  |
+ *	    |           v
+ *  INPUT --(--------->(+)+---> DATA
+ *          |             |
+ *	    +-------------+
+ *         
+ *
+ * Given:
+ *	iV: Initial vector, 64 bits (8 bytes) long.
+ *	Dn: the nth chunk of 64 bits (8 bytes) of data to encrypt (decrypt).
+ *	On: the nth chunk of 64 bits (8 bytes) of encrypted (decrypted) output.
+ *
+ *	V0 = DES(iV, key)
+ *	On = Dn ^ Vn
+ *	V(n+1) = DES(On, key)
+ */
+
+void cfb64_encrypt(unsigned char *s, int c)
+{
+	struct stinfo *stp = &fb[CFB].streams[DIR_ENCRYPT-1];
+	int index;
+
+	index = stp->str_index;
+	while (c-- > 0) {
+		if (index == sizeof(des_cblock)) {
+			des_cblock b;
+			des_ecb_encrypt(&stp->str_output, &b,stp->str_sched, 1);
+			memcpy(stp->str_feed, b, sizeof(des_cblock));
+			index = 0;
+		}
+
+		/* On encryption, we store (feed ^ data) which is cypher */
+		*s = stp->str_output[index] = (stp->str_feed[index] ^ *s);
+		s++;
+		index++;
+	}
+	stp->str_index = index;
+}
+
+int cfb64_decrypt(int data)
+{
+	struct stinfo *stp = &fb[CFB].streams[DIR_DECRYPT-1];
+	int index;
+
+	if (data == -1) {
+		/*
+		 * Back up one byte.  It is assumed that we will
+		 * never back up more than one byte.  If we do, this
+		 * may or may not work.
+		 */
+		if (stp->str_index)
+			--stp->str_index;
+		return(0);
+	}
+
+	index = stp->str_index++;
+	if (index == sizeof(des_cblock)) {
+		des_cblock b;
+		des_ecb_encrypt(&stp->str_output,&b, stp->str_sched, 1);
+		memcpy(stp->str_feed, b, sizeof(des_cblock));
+		stp->str_index = 1;	/* Next time will be 1 */
+		index = 0;		/* But now use 0 */ 
+	}
+
+	/* On decryption we store (data) which is cypher. */
+	stp->str_output[index] = data;
+	return(data ^ stp->str_feed[index]);
+}
+
+/*
+ * DES 64 bit Output Feedback
+ *
+ * key --->+-----+
+ *	+->| DES |--+
+ *	|  +-----+  |
+ *	+-----------+
+ *	            v
+ *  INPUT -------->(+) ----> DATA
+ *
+ * Given:
+ *	iV: Initial vector, 64 bits (8 bytes) long.
+ *	Dn: the nth chunk of 64 bits (8 bytes) of data to encrypt (decrypt).
+ *	On: the nth chunk of 64 bits (8 bytes) of encrypted (decrypted) output.
+ *
+ *	V0 = DES(iV, key)
+ *	V(n+1) = DES(Vn, key)
+ *	On = Dn ^ Vn
+ */
+
+void ofb64_encrypt(unsigned char *s, int c)
+{
+	struct stinfo *stp = &fb[OFB].streams[DIR_ENCRYPT-1];
+	int index;
+
+	index = stp->str_index;
+	while (c-- > 0) {
+		if (index == sizeof(des_cblock)) {
+			des_cblock b;
+			des_ecb_encrypt(&stp->str_feed,&b, stp->str_sched, 1);
+			memcpy(stp->str_feed, b, sizeof(des_cblock));
+			index = 0;
+		}
+		*s++ ^= stp->str_feed[index];
+		index++;
+	}
+	stp->str_index = index;
+}
+
+int ofb64_decrypt(int data)
+{
+	struct stinfo *stp = &fb[OFB].streams[DIR_DECRYPT-1];
+	int index;
+
+	if (data == -1) {
+		/*
+		 * Back up one byte.  It is assumed that we will
+		 * never back up more than one byte.  If we do, this
+		 * may or may not work.
+		 */
+		if (stp->str_index)
+			--stp->str_index;
+		return(0);
+	}
+
+	index = stp->str_index++;
+	if (index == sizeof(des_cblock)) {
+		des_cblock b;
+		des_ecb_encrypt(&stp->str_feed,&b,stp->str_sched, 1);
+		memcpy(stp->str_feed, b, sizeof(des_cblock));
+		stp->str_index = 1;	/* Next time will be 1 */
+		index = 0;		/* But now use 0 */ 
+	}
+
+	return(data ^ stp->str_feed[index]);
+}
+#endif
+
diff --git a/usr.bin/telnet/encrypt.c b/usr.bin/telnet/encrypt.c
new file mode 100644
index 00000000000..36b7a90a2c4
--- /dev/null
+++ b/usr.bin/telnet/encrypt.c
@@ -0,0 +1,1005 @@
+/*     $OpenBSD: encrypt.c,v 1.1 2005/05/24 03:43:56 deraadt Exp $     */
+
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  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.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
+ */
+
+ /*
+ * This source code is no longer held under any constraint of USA
+ * `cryptographic laws' since it was exported legally.  The cryptographic
+ * functions were removed from the code and a "Bones" distribution was
+ * made.  A Commodity Jurisdiction Request #012-94 was filed with the
+ * USA State Department, who handed it to the Commerce department.  The
+ * code was determined to fall under General License GTDA under ECCN 5D96G,
+ * and hence exportable.  The cryptographic interfaces were re-added by Eric
+ * Young, and then KTH proceeded to maintain the code in the free world.
+ *
+ */
+
+/*
+ * Copyright (C) 1990 by the Massachusetts Institute of Technology
+ *
+ * Export of this software from the United States of America is assumed
+ * to require a specific license from the United States Government.
+ * It is the responsibility of any person or organization contemplating
+ * export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ */
+
+/*
+RCSID("$KTH: encrypt.c,v 1.22.8.1 2002/02/06 03:39:13 assar Exp $");
+*/
+
+#if	defined(ENCRYPTION)
+
+#define	ENCRYPT_NAMES
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <arpa/telnet.h>
+
+#include "encrypt.h"
+#include "misc.h"
+
+
+
+/*
+ * These functions pointers point to the current routines
+ * for encrypting and decrypting data.
+ */
+void	(*encrypt_output) (unsigned char *, int);
+int	(*decrypt_input) (int);
+char	*nclearto;
+
+int encrypt_debug_mode = 0;
+static int decrypt_mode = 0;
+static int encrypt_mode = 0;
+static int encrypt_verbose = 0;
+static int autoencrypt = 0;
+static int autodecrypt = 0;
+static int havesessionkey = 0;
+static int Server = 0;
+static const char *Name = "Noname";
+
+#define	typemask(x)	((x) > 0 ? 1 << ((x)-1) : 0)
+
+static long i_support_encrypt = typemask(ENCTYPE_DES_CFB64)
+     | typemask(ENCTYPE_DES_OFB64);
+     static long i_support_decrypt = typemask(ENCTYPE_DES_CFB64)
+     | typemask(ENCTYPE_DES_OFB64);
+     static long i_wont_support_encrypt = 0;
+     static long i_wont_support_decrypt = 0;
+#define	I_SUPPORT_ENCRYPT	(i_support_encrypt & ~i_wont_support_encrypt)
+#define	I_SUPPORT_DECRYPT	(i_support_decrypt & ~i_wont_support_decrypt)
+
+     static long remote_supports_encrypt = 0;
+     static long remote_supports_decrypt = 0;
+
+     static Encryptions encryptions[] = {
+#if	defined(DES_ENCRYPTION)
+	 { "DES_CFB64",	ENCTYPE_DES_CFB64,
+	   cfb64_encrypt,	
+	   cfb64_decrypt,
+	   cfb64_init,
+	   cfb64_start,
+	   cfb64_is,
+	   cfb64_reply,
+	   cfb64_session,
+	   cfb64_keyid,
+	   cfb64_printsub },
+	 { "DES_OFB64",	ENCTYPE_DES_OFB64,
+	   ofb64_encrypt,	
+	   ofb64_decrypt,
+	   ofb64_init,
+	   ofb64_start,
+	   ofb64_is,
+	   ofb64_reply,
+	   ofb64_session,
+	   ofb64_keyid,
+	   ofb64_printsub },
+#endif
+	 { 0, },
+     };
+
+static unsigned char str_send[64] = { IAC, SB, TELOPT_ENCRYPT,
+				      ENCRYPT_SUPPORT };
+static unsigned char str_suplen = 0;
+static unsigned char str_start[72] = { IAC, SB, TELOPT_ENCRYPT };
+static unsigned char str_end[] = { IAC, SB, TELOPT_ENCRYPT, 0, IAC, SE };
+
+Encryptions *
+findencryption(int type)
+{
+    Encryptions *ep = encryptions;
+
+    if (!(I_SUPPORT_ENCRYPT & remote_supports_decrypt & typemask(type)))
+	return(0);
+    while (ep->type && ep->type != type)
+	++ep;
+    return(ep->type ? ep : 0);
+}
+
+Encryptions *
+finddecryption(int type)
+{
+    Encryptions *ep = encryptions;
+
+    if (!(I_SUPPORT_DECRYPT & remote_supports_encrypt & typemask(type)))
+	return(0);
+    while (ep->type && ep->type != type)
+	++ep;
+    return(ep->type ? ep : 0);
+}
+
+#define	MAXKEYLEN 64
+
+static struct key_info {
+    unsigned char keyid[MAXKEYLEN];
+    int keylen;
+    int dir;
+    int *modep;
+    Encryptions *(*getcrypt)(int);
+} ki[2] = {
+    { { 0 }, 0, DIR_ENCRYPT, &encrypt_mode, findencryption },
+    { { 0 }, 0, DIR_DECRYPT, &decrypt_mode, finddecryption },
+};
+
+void
+encrypt_init(const char *name, int server)
+{
+    Encryptions *ep = encryptions;
+
+    Name = name;
+    Server = server;
+    i_support_encrypt = i_support_decrypt = 0;
+    remote_supports_encrypt = remote_supports_decrypt = 0;
+    encrypt_mode = 0;
+    decrypt_mode = 0;
+    encrypt_output = 0;
+    decrypt_input = 0;
+#ifdef notdef
+    encrypt_verbose = !server;
+#endif
+
+    str_suplen = 4;
+
+    while (ep->type) {
+	if (encrypt_debug_mode)
+	    printf(">>>%s: I will support %s\r\n",
+		   Name, ENCTYPE_NAME(ep->type));
+	i_support_encrypt |= typemask(ep->type);
+	i_support_decrypt |= typemask(ep->type);
+	if ((i_wont_support_decrypt & typemask(ep->type)) == 0)
+	    if ((str_send[str_suplen++] = ep->type) == IAC)
+		str_send[str_suplen++] = IAC;
+	if (ep->init)
+	    (*ep->init)(Server);
+	++ep;
+    }
+    str_send[str_suplen++] = IAC;
+    str_send[str_suplen++] = SE;
+}
+
+void
+encrypt_list_types(void)
+{
+    Encryptions *ep = encryptions;
+
+    printf("Valid encryption types:\n");
+    while (ep->type) {
+	printf("\t%s (%d)\r\n", ENCTYPE_NAME(ep->type), ep->type);
+	++ep;
+    }
+}
+
+int
+EncryptEnable(char *type, char *mode)
+{
+    if (isprefix(type, "help") || isprefix(type, "?")) {
+	printf("Usage: encrypt enable <type> [input|output]\n");
+	encrypt_list_types();
+	return(0);
+    }
+    if (EncryptType(type, mode))
+	return(EncryptStart(mode));
+    return(0);
+}
+
+int
+EncryptDisable(char *type, char *mode)
+{
+    Encryptions *ep;
+    int ret = 0;
+
+    if (isprefix(type, "help") || isprefix(type, "?")) {
+	printf("Usage: encrypt disable <type> [input|output]\n");
+	encrypt_list_types();
+    } else if ((ep = (Encryptions *)genget(type, (char**)encryptions,
+					   sizeof(Encryptions))) == 0) {
+	printf("%s: invalid encryption type\n", type);
+    } else if (Ambiguous(ep)) {
+	printf("Ambiguous type '%s'\n", type);
+    } else {
+	if ((mode == 0) || (isprefix(mode, "input") ? 1 : 0)) {
+	    if (decrypt_mode == ep->type)
+		EncryptStopInput();
+	    i_wont_support_decrypt |= typemask(ep->type);
+	    ret = 1;
+	}
+	if ((mode == 0) || (isprefix(mode, "output"))) {
+	    if (encrypt_mode == ep->type)
+		EncryptStopOutput();
+	    i_wont_support_encrypt |= typemask(ep->type);
+	    ret = 1;
+	}
+	if (ret == 0)
+	    printf("%s: invalid encryption mode\n", mode);
+    }
+    return(ret);
+}
+
+int
+EncryptType(char *type, char *mode)
+{
+    Encryptions *ep;
+    int ret = 0;
+
+    if (isprefix(type, "help") || isprefix(type, "?")) {
+	printf("Usage: encrypt type <type> [input|output]\n");
+	encrypt_list_types();
+    } else if ((ep = (Encryptions *)genget(type, (char**)encryptions,
+					   sizeof(Encryptions))) == 0) {
+	printf("%s: invalid encryption type\n", type);
+    } else if (Ambiguous(ep)) {
+	printf("Ambiguous type '%s'\n", type);
+    } else {
+	if ((mode == 0) || isprefix(mode, "input")) {
+	    decrypt_mode = ep->type;
+	    i_wont_support_decrypt &= ~typemask(ep->type);
+	    ret = 1;
+	}
+	if ((mode == 0) || isprefix(mode, "output")) {
+	    encrypt_mode = ep->type;
+	    i_wont_support_encrypt &= ~typemask(ep->type);
+	    ret = 1;
+	}
+	if (ret == 0)
+	    printf("%s: invalid encryption mode\n", mode);
+    }
+    return(ret);
+}
+
+int
+EncryptStart(char *mode)
+{
+    int ret = 0;
+    if (mode) {
+	if (isprefix(mode, "input"))
+	    return(EncryptStartInput());
+	if (isprefix(mode, "output"))
+	    return(EncryptStartOutput());
+	if (isprefix(mode, "help") || isprefix(mode, "?")) {
+	    printf("Usage: encrypt start [input|output]\n");
+	    return(0);
+	}
+	printf("%s: invalid encryption mode 'encrypt start ?' for help\n", mode);
+	return(0);
+    }
+    ret += EncryptStartInput();
+    ret += EncryptStartOutput();
+    return(ret);
+}
+
+int
+EncryptStartInput(void)
+{
+    if (decrypt_mode) {
+	encrypt_send_request_start();
+	return(1);
+    }
+    printf("No previous decryption mode, decryption not enabled\r\n");
+    return(0);
+}
+
+int
+EncryptStartOutput(void)
+{
+    if (encrypt_mode) {
+	encrypt_start_output(encrypt_mode);
+	return(1);
+    }
+    printf("No previous encryption mode, encryption not enabled\r\n");
+    return(0);
+}
+
+int
+EncryptStop(char *mode)
+{
+    int ret = 0;
+    if (mode) {
+	if (isprefix(mode, "input"))
+	    return(EncryptStopInput());
+	if (isprefix(mode, "output"))
+	    return(EncryptStopOutput());
+	if (isprefix(mode, "help") || isprefix(mode, "?")) {
+	    printf("Usage: encrypt stop [input|output]\n");
+	    return(0);
+	}
+	printf("%s: invalid encryption mode 'encrypt stop ?' for help\n", mode);
+	return(0);
+    }
+    ret += EncryptStopInput();
+    ret += EncryptStopOutput();
+    return(ret);
+}
+
+int
+EncryptStopInput(void)
+{
+    encrypt_send_request_end();
+    return(1);
+}
+
+int
+EncryptStopOutput(void)
+{
+    encrypt_send_end();
+    return(1);
+}
+
+void
+encrypt_display(void)
+{
+    printf("Autoencrypt for output is %s. Autodecrypt for input is %s.\r\n",
+	   autoencrypt?"on":"off", autodecrypt?"on":"off");
+
+    if (encrypt_output)
+	printf("Currently encrypting output with %s\r\n",
+	       ENCTYPE_NAME(encrypt_mode));
+    else
+	printf("Currently not encrypting output\r\n");
+	
+    if (decrypt_input)
+	printf("Currently decrypting input with %s\r\n",
+	       ENCTYPE_NAME(decrypt_mode));
+    else
+	printf("Currently not decrypting input\r\n");
+}
+
+int
+EncryptStatus(void)
+{
+    printf("Autoencrypt for output is %s. Autodecrypt for input is %s.\r\n",
+	   autoencrypt?"on":"off", autodecrypt?"on":"off");
+
+    if (encrypt_output)
+	printf("Currently encrypting output with %s\r\n",
+	       ENCTYPE_NAME(encrypt_mode));
+    else if (encrypt_mode) {
+	printf("Currently output is clear text.\r\n");
+	printf("Last encryption mode was %s\r\n",
+	       ENCTYPE_NAME(encrypt_mode));
+    } else
+	printf("Currently not encrypting output\r\n");
+	
+    if (decrypt_input) {
+	printf("Currently decrypting input with %s\r\n",
+	       ENCTYPE_NAME(decrypt_mode));
+    } else if (decrypt_mode) {
+	printf("Currently input is clear text.\r\n");
+	printf("Last decryption mode was %s\r\n",
+	       ENCTYPE_NAME(decrypt_mode));
+    } else
+	printf("Currently not decrypting input\r\n");
+
+    return 1;
+}
+
+void
+encrypt_send_support(void)
+{
+    if (str_suplen) {
+	/*
+	 * If the user has requested that decryption start
+	 * immediatly, then send a "REQUEST START" before
+	 * we negotiate the type.
+	 */
+	if (!Server && autodecrypt)
+	    encrypt_send_request_start();
+	telnet_net_write(str_send, str_suplen);
+	printsub('>', &str_send[2], str_suplen - 2);
+	str_suplen = 0;
+    }
+}
+
+int
+EncryptDebug(int on)
+{
+    if (on < 0)
+	encrypt_debug_mode ^= 1;
+    else
+	encrypt_debug_mode = on;
+    printf("Encryption debugging %s\r\n",
+	   encrypt_debug_mode ? "enabled" : "disabled");
+    return(1);
+}
+
+/* turn on verbose encryption, but dont keep telling the whole world
+ */
+void encrypt_verbose_quiet(int on)
+{
+    if(on < 0)
+	encrypt_verbose ^= 1;
+    else
+	encrypt_verbose = on ? 1 : 0;
+}
+
+int
+EncryptVerbose(int on)
+{
+    encrypt_verbose_quiet(on);
+    printf("Encryption %s verbose\r\n",
+	   encrypt_verbose ? "is" : "is not");
+    return(1);
+}
+
+int
+EncryptAutoEnc(int on)
+{
+    encrypt_auto(on);
+    printf("Automatic encryption of output is %s\r\n",
+	   autoencrypt ? "enabled" : "disabled");
+    return(1);
+}
+
+int
+EncryptAutoDec(int on)
+{
+    decrypt_auto(on);
+    printf("Automatic decryption of input is %s\r\n",
+	   autodecrypt ? "enabled" : "disabled");
+    return(1);
+}
+
+/* Called when we receive a WONT or a DONT ENCRYPT after we sent a DO
+   encrypt */
+void
+encrypt_not(void)
+{
+    if (encrypt_verbose)
+  	printf("[ Connection is NOT encrypted ]\r\n");
+}
+
+/*
+ * Called when ENCRYPT SUPPORT is received.
+ */
+void
+encrypt_support(unsigned char *typelist, int cnt)
+{
+    int type, use_type = 0;
+    Encryptions *ep;
+
+    /*
+     * Forget anything the other side has previously told us.
+     */
+    remote_supports_decrypt = 0;
+
+    while (cnt-- > 0) {
+	type = *typelist++;
+	if (encrypt_debug_mode)
+	    printf(">>>%s: He is supporting %s (%d)\r\n",
+		   Name,
+		   ENCTYPE_NAME(type), type);
+	if ((type < ENCTYPE_CNT) &&
+	    (I_SUPPORT_ENCRYPT & typemask(type))) {
+	    remote_supports_decrypt |= typemask(type);
+	    if (use_type == 0)
+		use_type = type;
+	}
+    }
+    if (use_type) {
+	ep = findencryption(use_type);
+	if (!ep)
+	    return;
+	type = ep->start ? (*ep->start)(DIR_ENCRYPT, Server) : 0;
+	if (encrypt_debug_mode)
+	    printf(">>>%s: (*ep->start)() returned %d\r\n",
+		   Name, type);
+	if (type < 0)
+	    return;
+	encrypt_mode = use_type;
+	if (type == 0)
+	    encrypt_start_output(use_type);
+    }
+}
+
+void
+encrypt_is(unsigned char *data, int cnt)
+{
+    Encryptions *ep;
+    int type, ret;
+
+    if (--cnt < 0)
+	return;
+    type = *data++;
+    if (type < ENCTYPE_CNT)
+	remote_supports_encrypt |= typemask(type);
+    if (!(ep = finddecryption(type))) {
+	if (encrypt_debug_mode)
+	    printf(">>>%s: Can't find type %s (%d) for initial negotiation\r\n",
+		   Name,
+		   ENCTYPE_NAME_OK(type)
+		   ? ENCTYPE_NAME(type) : "(unknown)",
+		   type);
+	return;
+    }
+    if (!ep->is) {
+	if (encrypt_debug_mode)
+	    printf(">>>%s: No initial negotiation needed for type %s (%d)\r\n",
+		   Name,
+		   ENCTYPE_NAME_OK(type)
+		   ? ENCTYPE_NAME(type) : "(unknown)",
+		   type);
+	ret = 0;
+    } else {
+	ret = (*ep->is)(data, cnt);
+	if (encrypt_debug_mode)
+	    printf("(*ep->is)(%p, %d) returned %s(%d)\n", data, cnt,
+		   (ret < 0) ? "FAIL " :
+		   (ret == 0) ? "SUCCESS " : "MORE_TO_DO ", ret);
+    }
+    if (ret < 0) {
+	autodecrypt = 0;
+    } else {
+	decrypt_mode = type;
+	if (ret == 0 && autodecrypt)
+	    encrypt_send_request_start();
+    }
+}
+
+void
+encrypt_reply(unsigned char *data, int cnt)
+{
+    Encryptions *ep;
+    int ret, type;
+
+    if (--cnt < 0)
+	return;
+    type = *data++;
+    if (!(ep = findencryption(type))) {
+	if (encrypt_debug_mode)
+	    printf(">>>%s: Can't find type %s (%d) for initial negotiation\r\n",
+		   Name,
+		   ENCTYPE_NAME_OK(type)
+		   ? ENCTYPE_NAME(type) : "(unknown)",
+		   type);
+	return;
+    }
+    if (!ep->reply) {
+	if (encrypt_debug_mode)
+	    printf(">>>%s: No initial negotiation needed for type %s (%d)\r\n",
+		   Name,
+		   ENCTYPE_NAME_OK(type)
+		   ? ENCTYPE_NAME(type) : "(unknown)",
+		   type);
+	ret = 0;
+    } else {
+	ret = (*ep->reply)(data, cnt);
+	if (encrypt_debug_mode)
+	    printf("(*ep->reply)(%p, %d) returned %s(%d)\n",
+		   data, cnt,
+		   (ret < 0) ? "FAIL " :
+		   (ret == 0) ? "SUCCESS " : "MORE_TO_DO ", ret);
+    }
+    if (encrypt_debug_mode)
+	printf(">>>%s: encrypt_reply returned %d\n", Name, ret);
+    if (ret < 0) {
+	autoencrypt = 0;
+    } else {
+	encrypt_mode = type;
+	if (ret == 0 && autoencrypt)
+	    encrypt_start_output(type);
+    }
+}
+
+/*
+ * Called when a ENCRYPT START command is received.
+ */
+void
+encrypt_start(unsigned char *data, int cnt)
+{
+    Encryptions *ep;
+
+    if (!decrypt_mode) {
+	/*
+	 * Something is wrong.  We should not get a START
+	 * command without having already picked our
+	 * decryption scheme.  Send a REQUEST-END to
+	 * attempt to clear the channel...
+	 */
+	printf("%s: Warning, Cannot decrypt input stream!!!\r\n", Name);
+	encrypt_send_request_end();
+	return;
+    }
+
+    if ((ep = finddecryption(decrypt_mode))) {
+	decrypt_input = ep->input;
+	if (encrypt_verbose)
+	    printf("[ Input is now decrypted with type %s ]\r\n",
+		   ENCTYPE_NAME(decrypt_mode));
+	if (encrypt_debug_mode)
+	    printf(">>>%s: Start to decrypt input with type %s\r\n",
+		   Name, ENCTYPE_NAME(decrypt_mode));
+    } else {
+	printf("%s: Warning, Cannot decrypt type %s (%d)!!!\r\n",
+	       Name,
+	       ENCTYPE_NAME_OK(decrypt_mode)
+	       ? ENCTYPE_NAME(decrypt_mode)
+	       : "(unknown)",
+	       decrypt_mode);
+	encrypt_send_request_end();
+    }
+}
+
+void
+encrypt_session_key(Session_Key *key, int server)
+{
+    Encryptions *ep = encryptions;
+
+    havesessionkey = 1;
+
+    while (ep->type) {
+	if (ep->session)
+	    (*ep->session)(key, server);
+	++ep;
+    }
+}
+
+/*
+ * Called when ENCRYPT END is received.
+ */
+void
+encrypt_end(void)
+{
+    decrypt_input = 0;
+    if (encrypt_debug_mode)
+	printf(">>>%s: Input is back to clear text\r\n", Name);
+    if (encrypt_verbose)
+	printf("[ Input is now clear text ]\r\n");
+}
+
+/*
+ * Called when ENCRYPT REQUEST-END is received.
+ */
+void
+encrypt_request_end(void)
+{
+    encrypt_send_end();
+}
+
+/*
+ * Called when ENCRYPT REQUEST-START is received.  If we receive
+ * this before a type is picked, then that indicates that the
+ * other side wants us to start encrypting data as soon as we
+ * can. 
+ */
+void
+encrypt_request_start(unsigned char *data, int cnt)
+{
+    if (encrypt_mode == 0)  {
+	if (Server)
+	    autoencrypt = 1;
+	return;
+    }
+    encrypt_start_output(encrypt_mode);
+}
+
+static unsigned char str_keyid[(MAXKEYLEN*2)+5] = { IAC, SB, TELOPT_ENCRYPT };
+
+static void
+encrypt_keyid(struct key_info *kp, unsigned char *keyid, int len)
+{
+    Encryptions *ep;
+    int dir = kp->dir;
+    int ret = 0;
+
+    if (!(ep = (*kp->getcrypt)(*kp->modep))) {
+	if (len == 0)
+	    return;
+	kp->keylen = 0;
+    } else if (len == 0) {
+	/*
+	 * Empty option, indicates a failure.
+	 */
+	if (kp->keylen == 0)
+	    return;
+	kp->keylen = 0;
+	if (ep->keyid)
+	    (void)(*ep->keyid)(dir, kp->keyid, &kp->keylen);
+
+    } else if ((len != kp->keylen) || (memcmp(keyid,kp->keyid,len) != 0)) {
+	/*
+	 * Length or contents are different
+	 */
+	kp->keylen = len;
+	memcpy(kp->keyid,keyid, len);
+	if (ep->keyid)
+	    (void)(*ep->keyid)(dir, kp->keyid, &kp->keylen);
+    } else {
+	if (ep->keyid)
+	    ret = (*ep->keyid)(dir, kp->keyid, &kp->keylen);
+	if ((ret == 0) && (dir == DIR_ENCRYPT) && autoencrypt)
+	    encrypt_start_output(*kp->modep);
+	return;
+    }
+
+    encrypt_send_keyid(dir, kp->keyid, kp->keylen, 0);
+}
+
+void encrypt_enc_keyid(unsigned char *keyid, int len)
+{
+    encrypt_keyid(&ki[1], keyid, len);
+}
+
+void encrypt_dec_keyid(unsigned char *keyid, int len)
+{
+    encrypt_keyid(&ki[0], keyid, len);
+}
+
+
+void encrypt_send_keyid(int dir, unsigned char *keyid, int keylen, int saveit)
+{
+    unsigned char *strp;
+
+    str_keyid[3] = (dir == DIR_ENCRYPT)
+	? ENCRYPT_ENC_KEYID : ENCRYPT_DEC_KEYID;
+    if (saveit) {
+	struct key_info *kp = &ki[(dir == DIR_ENCRYPT) ? 0 : 1];
+	memcpy(kp->keyid,keyid, keylen);
+	kp->keylen = keylen;
+    }
+
+    for (strp = &str_keyid[4]; keylen > 0; --keylen) {
+	if ((*strp++ = *keyid++) == IAC)
+	    *strp++ = IAC;
+    }
+    *strp++ = IAC;
+    *strp++ = SE;
+    telnet_net_write(str_keyid, strp - str_keyid);
+    printsub('>', &str_keyid[2], strp - str_keyid - 2);
+}
+
+void
+encrypt_auto(int on)
+{
+    if (on < 0)
+	autoencrypt ^= 1;
+    else
+	autoencrypt = on ? 1 : 0;
+}
+
+void
+decrypt_auto(int on)
+{
+    if (on < 0)
+	autodecrypt ^= 1;
+    else
+	autodecrypt = on ? 1 : 0;
+}
+
+void
+encrypt_start_output(int type)
+{
+    Encryptions *ep;
+    unsigned char *p;
+    int i;
+
+    if (!(ep = findencryption(type))) {
+	if (encrypt_debug_mode) {
+	    printf(">>>%s: Can't encrypt with type %s (%d)\r\n",
+		   Name,
+		   ENCTYPE_NAME_OK(type)
+		   ? ENCTYPE_NAME(type) : "(unknown)",
+		   type);
+	}
+	return;
+    }
+    if (ep->start) {
+	i = (*ep->start)(DIR_ENCRYPT, Server);
+	if (encrypt_debug_mode) {
+	    printf(">>>%s: Encrypt start: %s (%d) %s\r\n",
+		   Name, 
+		   (i < 0) ? "failed" :
+		   "initial negotiation in progress",
+		   i, ENCTYPE_NAME(type));
+	}
+	if (i)
+	    return;
+    }
+    p = str_start + 3;
+    *p++ = ENCRYPT_START;
+    for (i = 0; i < ki[0].keylen; ++i) {
+	if ((*p++ = ki[0].keyid[i]) == IAC)
+	    *p++ = IAC;
+    }
+    *p++ = IAC;
+    *p++ = SE;
+    telnet_net_write(str_start, p - str_start);
+    net_encrypt();
+    printsub('>', &str_start[2], p - &str_start[2]);
+    /*
+     * If we are already encrypting in some mode, then
+     * encrypt the ring (which includes our request) in
+     * the old mode, mark it all as "clear text" and then
+     * switch to the new mode.
+     */
+    encrypt_output = ep->output;
+    encrypt_mode = type;
+    if (encrypt_debug_mode)
+	printf(">>>%s: Started to encrypt output with type %s\r\n",
+	       Name, ENCTYPE_NAME(type));
+    if (encrypt_verbose)
+	printf("[ Output is now encrypted with type %s ]\r\n",
+	       ENCTYPE_NAME(type));
+}
+
+void
+encrypt_send_end(void)
+{
+    if (!encrypt_output)
+	return;
+
+    str_end[3] = ENCRYPT_END;
+    telnet_net_write(str_end, sizeof(str_end));
+    net_encrypt();
+    printsub('>', &str_end[2], sizeof(str_end) - 2);
+    /*
+     * Encrypt the output buffer now because it will not be done by
+     * netflush...
+     */
+    encrypt_output = 0;
+    if (encrypt_debug_mode)
+	printf(">>>%s: Output is back to clear text\r\n", Name);
+    if (encrypt_verbose)
+	printf("[ Output is now clear text ]\r\n");
+}
+
+void
+encrypt_send_request_start(void)
+{
+    unsigned char *p;
+    int i;
+
+    p = &str_start[3];
+    *p++ = ENCRYPT_REQSTART;
+    for (i = 0; i < ki[1].keylen; ++i) {
+	if ((*p++ = ki[1].keyid[i]) == IAC)
+	    *p++ = IAC;
+    }
+    *p++ = IAC;
+    *p++ = SE;
+    telnet_net_write(str_start, p - str_start);
+    printsub('>', &str_start[2], p - &str_start[2]);
+    if (encrypt_debug_mode)
+	printf(">>>%s: Request input to be encrypted\r\n", Name);
+}
+
+void
+encrypt_send_request_end(void)
+{
+    str_end[3] = ENCRYPT_REQEND;
+    telnet_net_write(str_end, sizeof(str_end));
+    printsub('>', &str_end[2], sizeof(str_end) - 2);
+
+    if (encrypt_debug_mode)
+	printf(">>>%s: Request input to be clear text\r\n", Name);
+}
+
+
+void encrypt_wait(void)
+{
+    if (encrypt_debug_mode)
+	printf(">>>%s: in encrypt_wait\r\n", Name);
+    if (!havesessionkey || !(I_SUPPORT_ENCRYPT & remote_supports_decrypt))
+	return;
+    while (autoencrypt && !encrypt_output)
+	if (telnet_spin())
+	    return;
+}
+
+int
+encrypt_delay(void)
+{
+    if(!havesessionkey ||
+       (I_SUPPORT_ENCRYPT & remote_supports_decrypt) == 0 ||
+       (I_SUPPORT_DECRYPT & remote_supports_encrypt) == 0)
+	return 0;
+    if(!(encrypt_output && decrypt_input))
+	return 1;
+    return 0;
+}
+
+int encrypt_is_encrypting()
+{
+    if (encrypt_output && decrypt_input)
+	return 1;
+    return 0;
+}
+
+void
+encrypt_debug(int mode)
+{
+    encrypt_debug_mode = mode;
+}
+
+void encrypt_gen_printsub(unsigned char *data, int cnt, 
+			  unsigned char *buf, int buflen)
+{
+    char tbuf[16], *cp;
+
+    cnt -= 2;
+    data += 2;
+    buf[buflen-1] = '\0';
+    buf[buflen-2] = '*';
+    buflen -= 2;;
+    for (; cnt > 0; cnt--, data++) {
+	snprintf(tbuf, sizeof(tbuf), " %d", *data);
+	for (cp = tbuf; *cp && buflen > 0; --buflen)
+	    *buf++ = *cp++;
+	if (buflen <= 0)
+	    return;
+    }
+    *buf = '\0';
+}
+
+void
+encrypt_printsub(unsigned char *data, int cnt, unsigned char *buf, int buflen)
+{
+    Encryptions *ep;
+    int type = data[1];
+
+    for (ep = encryptions; ep->type && ep->type != type; ep++)
+	;
+
+    if (ep->printsub)
+	(*ep->printsub)(data, cnt, buf, buflen);
+    else
+	encrypt_gen_printsub(data, cnt, buf, buflen);
+}
+#endif
diff --git a/usr.bin/telnet/genget.c b/usr.bin/telnet/genget.c
new file mode 100644
index 00000000000..5f7a8ce4351
--- /dev/null
+++ b/usr.bin/telnet/genget.c
@@ -0,0 +1,104 @@
+/*     $OpenBSD: genget.c,v 1.1 2005/05/24 03:43:56 deraadt Exp $  */
+
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  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.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
+ */
+
+#ifndef lint
+/* from: static char sccsid[] = "@(#)genget.c  8.2 (Berkeley) 5/30/95"; */
+/* from: static char *rcsid = "$NetBSD: genget.c,v 1.5 1996/02/24 01:15:21 jtk Exp $"; */
+static char *rcsid = "$OpenBSD: genget.c,v 1.1 2005/05/24 03:43:56 deraadt Exp $";
+#endif /* not lint */
+
+/* $KTH: genget.c,v 1.6 1997/05/04 09:01:34 assar Exp $ */
+
+#include <ctype.h>
+#include "misc-proto.h"
+
+#define	LOWER(x) (isupper((int)x) ? tolower((int)x) : (x))
+/*
+ * The prefix function returns 0 if *s1 is not a prefix
+ * of *s2.  If *s1 exactly matches *s2, the negative of
+ * the length is returned.  If *s1 is a prefix of *s2,
+ * the length of *s1 is returned.
+ */
+int
+isprefix(char *s1, char *s2)
+{
+    char *os1;
+    char c1, c2;
+
+    if (*s1 == '\0')
+	return(-1);
+    os1 = s1;
+    c1 = *s1;
+    c2 = *s2;
+    while (LOWER(c1) == LOWER(c2)) {
+	if (c1 == '\0')
+	    break;
+	c1 = *++s1;
+	c2 = *++s2;
+    }
+    return(*s1 ? 0 : (*s2 ? (s1 - os1) : (os1 - s1)));
+}
+
+static char *ambiguous;		/* special return value for command routines */
+
+char **
+genget(char *name, char **table, int stlen)
+     /* name to match */
+     /* name entry in table */
+	   	      
+{
+    char **c, **found;
+    int n;
+
+    if (name == 0)
+	return 0;
+
+    found = 0;
+    for (c = table; *c != 0; c = (char **)((char *)c + stlen)) {
+	if ((n = isprefix(name, *c)) == 0)
+	    continue;
+	if (n < 0)		/* exact match */
+	    return(c);
+	if (found)
+	    return(&ambiguous);
+	found = c;
+    }
+    return(found);
+}
+
+/*
+ * Function call version of Ambiguous()
+ */
+int
+Ambiguous(void *s)
+{
+    return((char **)s == &ambiguous);
+}
diff --git a/usr.bin/telnet/kerberos5.c b/usr.bin/telnet/kerberos5.c
new file mode 100644
index 00000000000..966332dbfbc
--- /dev/null
+++ b/usr.bin/telnet/kerberos5.c
@@ -0,0 +1,910 @@
+/*     $OpenBSD: kerberos5.c,v 1.1 2005/05/24 03:43:56 deraadt Exp $       */
+
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  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.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
+ */
+
+/*
+ * This source code is no longer held under any constraint of USA
+ * `cryptographic laws' since it was exported legally.  The cryptographic
+ * functions were removed from the code and a "Bones" distribution was
+ * made.  A Commodity Jurisdiction Request #012-94 was filed with the
+ * USA State Department, who handed it to the Commerce department.  The
+ * code was determined to fall under General License GTDA under ECCN 5D96G,
+ * and hence exportable.  The cryptographic interfaces were re-added by Eric
+ * Young, and then KTH proceeded to maintain the code in the free world.
+ *
+ */
+
+/*
+ * Copyright (C) 1990 by the Massachusetts Institute of Technology
+ *
+ * Export of this software from the United States of America may
+ * require a specific license from the United States Government.
+ * It is the responsibility of any person or organization contemplating
+ * export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ */
+
+/* $KTH: kerberos5.c,v 1.47 2001/01/09 18:45:33 assar Exp $ */
+
+#ifdef	KRB5
+
+#include <arpa/telnet.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <netdb.h>
+#include <ctype.h>
+#include <pwd.h>
+#include <errno.h>
+#define Authenticator k5_Authenticator
+#include <kerberosV/krb5.h>
+#undef Authenticator
+#include <err.h>
+
+#include "encrypt.h"
+#include "auth.h"
+#include "misc.h"
+
+#if defined(DCE)
+int dfsk5ok = 0;
+int dfspag = 0;
+int dfsfwd = 0;
+#endif
+
+int forward_flags = 0;  /* Flags get set in telnet/main.c on -f and -F */
+
+int forward(int);
+int forwardable(int);
+
+/* These values need to be the same as those defined in telnet/main.c. */
+/* Either define them in both places, or put in some common header file. */
+#define OPTS_FORWARD_CREDS	0x00000002
+#define OPTS_FORWARDABLE_CREDS	0x00000001
+
+
+void kerberos5_forward (Authenticator *);
+
+static unsigned char str_data[1024] = { IAC, SB, TELOPT_AUTHENTICATION, 0,
+			  		AUTHTYPE_KERBEROS_V5, };
+
+#define	KRB_AUTH		0	/* Authentication data follows */
+#define	KRB_REJECT		1	/* Rejected (reason might follow) */
+#define	KRB_ACCEPT		2	/* Accepted */
+#define	KRB_RESPONSE		3	/* Response for mutual auth. */
+
+#define KRB_FORWARD     	4       /* Forwarded credentials follow */
+#define KRB_FORWARD_ACCEPT     	5       /* Forwarded credentials accepted */
+#define KRB_FORWARD_REJECT     	6       /* Forwarded credentials rejected */
+
+static	krb5_data auth;
+static  krb5_ticket *ticket;
+
+static krb5_context context;
+static krb5_auth_context auth_context;
+
+int
+check_krb5_tickets()
+{
+    krb5_error_code ret;
+    krb5_context context;
+    krb5_ccache ccache;
+    krb5_principal principal;
+    int retval = 1;
+
+    ret = krb5_init_context(&context);
+    if(ret)
+	errx(1, "krb5_init_context failt: %d", ret);
+
+    ret = krb5_cc_default(context, &ccache);
+    if(ret)
+	errx(1, "krb5_cc_default: %d", ret);
+
+    ret = krb5_cc_get_principal (context, ccache, &principal);
+    switch(ret) {
+    case ENOENT:
+	retval = 0;
+	goto done;
+    case 0:
+	retval = 1;
+	goto done;
+    default:
+	errx(1, "krb5_cc_get_principal: %d", ret);
+	break;
+    }
+
+ done:
+    krb5_free_context(context);
+    return retval;
+}
+
+static int
+Data(Authenticator *ap, int type, void *d, int c)
+{
+    unsigned char *p = str_data + 4;
+    unsigned char *cd = (unsigned char *)d;
+
+    if (c == -1)
+	c = strlen(cd);
+
+    if (auth_debug_mode) {
+	printf("%s:%d: [%d] (%d)",
+	       str_data[3] == TELQUAL_IS ? ">>>IS" : ">>>REPLY",
+	       str_data[3],
+	       type, c);
+	printd(d, c);
+	printf("\r\n");
+    }
+    *p++ = ap->type;
+    *p++ = ap->way;
+    *p++ = type;
+    while (c-- > 0) {
+	if ((*p++ = *cd++) == IAC)
+	    *p++ = IAC;
+    }
+    *p++ = IAC;
+    *p++ = SE;
+    if (str_data[3] == TELQUAL_IS)
+	printsub('>', &str_data[2], p - &str_data[2]);
+    return(telnet_net_write(str_data, p - str_data));
+}
+
+int
+kerberos5_init(Authenticator *ap, int server)
+{
+    krb5_error_code ret;
+
+    ret = krb5_init_context(&context);
+    if (ret)
+	return 0;
+    if (server) {
+	krb5_keytab kt;
+	krb5_kt_cursor cursor;
+
+	ret = krb5_kt_default(context, &kt);
+	if (ret)
+	    return 0;
+
+	ret = krb5_kt_start_seq_get (context, kt, &cursor);
+	if (ret) {
+	    krb5_kt_close (context, kt);
+	    return 0;
+	}
+	krb5_kt_end_seq_get (context, kt, &cursor);
+	krb5_kt_close (context, kt);
+
+	str_data[3] = TELQUAL_REPLY;
+    } else
+	str_data[3] = TELQUAL_IS;
+    return(1);
+}
+
+extern int net;
+static int
+kerberos5_send(char *name, Authenticator *ap)
+{
+    krb5_error_code ret;
+    krb5_ccache ccache;
+    int ap_opts;
+    krb5_data cksum_data;
+    char foo[2];
+
+    if(check_krb5_tickets() != 1)
+	return 0;
+    
+    if (!UserNameRequested) {
+	if (auth_debug_mode) {
+	    printf("Kerberos V5: no user name supplied\r\n");
+	}
+	return(0);
+    }
+    
+    ret = krb5_cc_default(context, &ccache);
+    if (ret) {
+	if (auth_debug_mode) {
+	    printf("Kerberos V5: could not get default ccache: %s\r\n",
+		   krb5_get_err_text (context, ret));
+	}
+	return 0;
+    }
+	
+    if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL)
+	ap_opts = AP_OPTS_MUTUAL_REQUIRED;
+    else
+	ap_opts = 0;
+    
+    ap_opts |= AP_OPTS_USE_SUBKEY;
+    
+    ret = krb5_auth_con_init (context, &auth_context);
+    if (ret) {
+	if (auth_debug_mode) {
+	    printf("Kerberos V5: krb5_auth_con_init failed (%s)\r\n",
+		   krb5_get_err_text(context, ret));
+	}
+	return(0);
+    }
+
+    ret = krb5_auth_con_setaddrs_from_fd (context,
+					  auth_context,
+					  &net);
+    if (ret) {
+	if (auth_debug_mode) {
+	    printf ("Kerberos V5:"
+		    " krb5_auth_con_setaddrs_from_fd failed (%s)\r\n",
+		    krb5_get_err_text(context, ret));
+	}
+	return(0);
+    }
+
+    krb5_auth_con_setkeytype (context, auth_context, KEYTYPE_DES);
+
+    foo[0] = ap->type;
+    foo[1] = ap->way;
+
+    cksum_data.length = sizeof(foo);
+    cksum_data.data   = foo;
+
+
+    {
+	krb5_principal service;
+	char sname[128];
+
+
+	ret = krb5_sname_to_principal (context,
+				       RemoteHostName,
+				       NULL,
+				       KRB5_NT_SRV_HST,
+				       &service);
+	if(ret) {
+	    if (auth_debug_mode) {
+		printf ("Kerberos V5:"
+			" krb5_sname_to_principal(%s) failed (%s)\r\n",
+			RemoteHostName, krb5_get_err_text(context, ret));
+	    }
+	    return 0;
+	}
+	ret = krb5_unparse_name_fixed(context, service, sname, sizeof(sname));
+	if(ret) {
+	    if (auth_debug_mode) {
+		printf ("Kerberos V5:"
+			" krb5_unparse_name_fixed failed (%s)\r\n",
+			krb5_get_err_text(context, ret));
+	    }
+	    return 0;
+	}
+	printf("[ Trying %s (%s)... ]\r\n", name, sname);
+	ret = krb5_mk_req_exact(context, &auth_context, ap_opts,
+				service, 
+				&cksum_data, ccache, &auth);
+	krb5_free_principal (context, service);
+
+    }
+    if (ret) {
+	if (1 || auth_debug_mode) {
+	    printf("Kerberos V5: mk_req failed (%s)\r\n",
+		   krb5_get_err_text(context, ret));
+	}
+	return(0);
+    }
+
+    if (!auth_sendname((unsigned char *)UserNameRequested,
+		       strlen(UserNameRequested))) {
+	if (auth_debug_mode)
+	    printf("Not enough room for user name\r\n");
+	return(0);
+    }
+    if (!Data(ap, KRB_AUTH, auth.data, auth.length)) {
+	if (auth_debug_mode)
+	    printf("Not enough room for authentication data\r\n");
+	return(0);
+    }
+    if (auth_debug_mode) {
+	printf("Sent Kerberos V5 credentials to server\r\n");
+    }
+    return(1);
+}
+
+int
+kerberos5_send_mutual(Authenticator *ap)
+{
+    return kerberos5_send("mutual KERBEROS5", ap);
+}
+
+int
+kerberos5_send_oneway(Authenticator *ap)
+{
+    return kerberos5_send("KERBEROS5", ap);
+}
+
+void
+kerberos5_is(Authenticator *ap, unsigned char *data, int cnt)
+{
+    krb5_error_code ret;
+    krb5_data outbuf;
+    krb5_keyblock *key_block;
+    char *name;
+    krb5_principal server;
+    int zero = 0;
+
+    if (cnt-- < 1)
+	return;
+    switch (*data++) {
+    case KRB_AUTH:
+	auth.data = (char *)data;
+	auth.length = cnt;
+
+	auth_context = NULL;
+
+	ret = krb5_auth_con_init (context, &auth_context);
+	if (ret) {
+	    Data(ap, KRB_REJECT, "krb5_auth_con_init failed", -1);
+	    auth_finished(ap, AUTH_REJECT);
+	    if (auth_debug_mode)
+		printf("Kerberos V5: krb5_auth_con_init failed (%s)\r\n",
+		       krb5_get_err_text(context, ret));
+	    return;
+	}
+
+	ret = krb5_auth_con_setaddrs_from_fd (context,
+					      auth_context,
+					      &zero);
+	if (ret) {
+	    Data(ap, KRB_REJECT, "krb5_auth_con_setaddrs_from_fd failed", -1);
+	    auth_finished(ap, AUTH_REJECT);
+	    if (auth_debug_mode)
+		printf("Kerberos V5: "
+		       "krb5_auth_con_setaddrs_from_fd failed (%s)\r\n",
+		       krb5_get_err_text(context, ret));
+	    return;
+	}
+
+	ret = krb5_sock_to_principal (context,
+				      0,
+				      "host",
+				      KRB5_NT_SRV_HST,
+				      &server);
+	if (ret) {
+	    Data(ap, KRB_REJECT, "krb5_sock_to_principal failed", -1);
+	    auth_finished(ap, AUTH_REJECT);
+	    if (auth_debug_mode)
+		printf("Kerberos V5: "
+		       "krb5_sock_to_principal failed (%s)\r\n",
+		       krb5_get_err_text(context, ret));
+	    return;
+	}
+
+	ret = krb5_rd_req(context,
+			  &auth_context,
+			  &auth, 
+			  server,
+			  NULL,
+			  NULL,
+			  &ticket);
+
+	krb5_free_principal (context, server);
+	if (ret) {
+	    char *errbuf;
+
+	    asprintf(&errbuf,
+		     "Read req failed: %s",
+		     krb5_get_err_text(context, ret));
+	    Data(ap, KRB_REJECT, errbuf, -1);
+	    if (auth_debug_mode)
+		printf("%s\r\n", errbuf);
+	    free (errbuf);
+	    return;
+	}
+	
+	{
+	    char foo[2];
+	    
+	    foo[0] = ap->type;
+	    foo[1] = ap->way;
+	    
+	    ret = krb5_verify_authenticator_checksum(context,
+						     auth_context,
+						     foo, 
+						     sizeof(foo));
+
+	    if (ret) {
+		char *errbuf;
+		asprintf(&errbuf, "Bad checksum: %s", 
+			 krb5_get_err_text(context, ret));
+		Data(ap, KRB_REJECT, errbuf, -1);
+		if (auth_debug_mode)
+		    printf ("%s\r\n", errbuf);
+		free(errbuf);
+		return;
+	    }
+	}
+	ret = krb5_auth_con_getremotesubkey (context,
+					     auth_context,
+					     &key_block);
+
+	if (ret) {
+	    Data(ap, KRB_REJECT, "krb5_auth_con_getremotesubkey failed", -1);
+	    auth_finished(ap, AUTH_REJECT);
+	    if (auth_debug_mode)
+		printf("Kerberos V5: "
+		       "krb5_auth_con_getremotesubkey failed (%s)\r\n",
+		       krb5_get_err_text(context, ret));
+	    return;
+	}
+
+	if (key_block == NULL) {
+	    ret = krb5_auth_con_getkey(context,
+				       auth_context,
+				       &key_block);
+	}
+	if (ret) {
+	    Data(ap, KRB_REJECT, "krb5_auth_con_getkey failed", -1);
+	    auth_finished(ap, AUTH_REJECT);
+	    if (auth_debug_mode)
+		printf("Kerberos V5: "
+		       "krb5_auth_con_getkey failed (%s)\r\n",
+		       krb5_get_err_text(context, ret));
+	    return;
+	}
+	if (key_block == NULL) {
+	    Data(ap, KRB_REJECT, "no subkey received", -1);
+	    auth_finished(ap, AUTH_REJECT);
+	    if (auth_debug_mode)
+		printf("Kerberos V5: "
+		       "krb5_auth_con_getremotesubkey returned NULL key\r\n");
+	    return;
+	}
+
+	if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) {
+	    ret = krb5_mk_rep(context, auth_context, &outbuf);
+	    if (ret) {
+		Data(ap, KRB_REJECT,
+		     "krb5_mk_rep failed", -1);
+		auth_finished(ap, AUTH_REJECT);
+		if (auth_debug_mode)
+		    printf("Kerberos V5: "
+			   "krb5_mk_rep failed (%s)\r\n",
+			   krb5_get_err_text(context, ret));
+		return;
+	    }
+	    Data(ap, KRB_RESPONSE, outbuf.data, outbuf.length);
+	}
+	if (krb5_unparse_name(context, ticket->client, &name))
+	    name = 0;
+
+	if(UserNameRequested && krb5_kuserok(context,
+					     ticket->client,
+					     UserNameRequested)) {
+	    Data(ap, KRB_ACCEPT, name, name ? -1 : 0);
+	    if (auth_debug_mode) {
+		printf("Kerberos5 identifies him as ``%s''\r\n",
+		       name ? name : "");
+	    }
+
+	    if(key_block->keytype == ETYPE_DES_CBC_MD5 ||
+	       key_block->keytype == ETYPE_DES_CBC_MD4 ||
+	       key_block->keytype == ETYPE_DES_CBC_CRC) {
+		Session_Key skey;
+
+		skey.type = SK_DES;
+		skey.length = 8;
+		skey.data = key_block->keyvalue.data;
+		encrypt_session_key(&skey, 0);
+	    }
+
+	} else {
+	    char *msg;
+
+	    asprintf (&msg, "user `%s' is not authorized to "
+		      "login as `%s'", 
+		      name ? name : "<unknown>",
+		      UserNameRequested ? UserNameRequested : "<nobody>");
+	    if (msg == NULL)
+		Data(ap, KRB_REJECT, NULL, 0);
+	    else {
+		Data(ap, KRB_REJECT, (void *)msg, -1);
+		free(msg);
+	    }
+	    auth_finished (ap, AUTH_REJECT);
+	    krb5_free_keyblock_contents(context, key_block);
+	    break;
+	}
+	auth_finished(ap, AUTH_USER);
+	krb5_free_keyblock_contents(context, key_block);
+	
+	break;
+    case KRB_FORWARD: {
+	struct passwd *pwd;
+	char ccname[1024];	/* XXX */
+	krb5_data inbuf;
+	krb5_ccache ccache;
+	inbuf.data = (char *)data;
+	inbuf.length = cnt;
+
+	pwd = getpwnam (UserNameRequested);
+	if (pwd == NULL)
+	    break;
+
+	snprintf (ccname, sizeof(ccname),
+		  "FILE:/tmp/krb5cc_%u", pwd->pw_uid);
+
+	ret = krb5_cc_resolve (context, ccname, &ccache);
+	if (ret) {
+	    if (auth_debug_mode)
+		printf ("Kerberos V5: could not get ccache: %s\r\n",
+			krb5_get_err_text(context, ret));
+	    break;
+	}
+
+	ret = krb5_cc_initialize (context,
+				  ccache,
+				  ticket->client);
+	if (ret) {
+	    if (auth_debug_mode)
+		printf ("Kerberos V5: could not init ccache: %s\r\n",
+			krb5_get_err_text(context, ret));
+	    break;
+	}
+
+#if defined(DCE)
+	esetenv("KRB5CCNAME", ccname, 1);
+#endif
+	ret = krb5_rd_cred2 (context,
+			     auth_context,
+			     ccache,
+			     &inbuf);
+	if(ret) {
+	    char *errbuf;
+
+	    asprintf (&errbuf,
+		      "Read forwarded creds failed: %s",
+		      krb5_get_err_text (context, ret));
+	    if(errbuf == NULL)
+		Data(ap, KRB_FORWARD_REJECT, NULL, 0);
+	    else
+		Data(ap, KRB_FORWARD_REJECT, errbuf, -1);
+	    if (auth_debug_mode)
+		printf("Could not read forwarded credentials: %s\r\n",
+		       errbuf);
+	    free (errbuf);
+	} else {
+	    Data(ap, KRB_FORWARD_ACCEPT, 0, 0);
+#if defined(DCE)
+	    dfsfwd = 1;
+#endif
+	}
+	chown (ccname + 5, pwd->pw_uid, -1);
+	if (auth_debug_mode)
+	    printf("Forwarded credentials obtained\r\n");
+	break;
+    }
+    default:
+	if (auth_debug_mode)
+	    printf("Unknown Kerberos option %d\r\n", data[-1]);
+	Data(ap, KRB_REJECT, 0, 0);
+	break;
+    }
+}
+
+void
+kerberos5_reply(Authenticator *ap, unsigned char *data, int cnt)
+{
+    static int mutual_complete = 0;
+
+    if (cnt-- < 1)
+	return;
+    switch (*data++) {
+    case KRB_REJECT:
+	if (cnt > 0) {
+	    printf("[ Kerberos V5 refuses authentication because %.*s ]\r\n",
+		   cnt, data);
+	} else
+	    printf("[ Kerberos V5 refuses authentication ]\r\n");
+	auth_send_retry();
+	return;
+    case KRB_ACCEPT: {
+	krb5_error_code ret;
+	Session_Key skey;
+	krb5_keyblock *keyblock;
+	
+	if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL &&
+	    !mutual_complete) {
+	    printf("[ Kerberos V5 accepted you, but didn't provide mutual authentication! ]\r\n");
+	    auth_send_retry();
+	    return;
+	}
+	if (cnt)
+	    printf("[ Kerberos V5 accepts you as ``%.*s'' ]\r\n", cnt, data);
+	else
+	    printf("[ Kerberos V5 accepts you ]\r\n");
+	      
+	ret = krb5_auth_con_getlocalsubkey (context,
+					    auth_context,
+					    &keyblock);
+	if (ret)
+	    ret = krb5_auth_con_getkey (context,
+					auth_context,
+					&keyblock);
+	if(ret) {
+	    printf("[ krb5_auth_con_getkey: %s ]\r\n",
+		   krb5_get_err_text(context, ret));
+	    auth_send_retry();
+	    return;
+	}
+	      
+	skey.type = SK_DES;
+	skey.length = 8;
+	skey.data = keyblock->keyvalue.data;
+	encrypt_session_key(&skey, 0);
+	krb5_free_keyblock_contents (context, keyblock);
+	auth_finished(ap, AUTH_USER);
+	if (forward_flags & OPTS_FORWARD_CREDS)
+	    kerberos5_forward(ap);
+	break;
+    }
+    case KRB_RESPONSE:
+	if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) {
+	    /* the rest of the reply should contain a krb_ap_rep */
+	  krb5_ap_rep_enc_part *reply;
+	  krb5_data inbuf;
+	  krb5_error_code ret;
+	    
+	  inbuf.length = cnt;
+	  inbuf.data = (char *)data;
+
+	  ret = krb5_rd_rep(context, auth_context, &inbuf, &reply);
+	  if (ret) {
+	      printf("[ Mutual authentication failed: %s ]\r\n",
+		     krb5_get_err_text (context, ret));
+	      auth_send_retry();
+	      return;
+	  }
+	  krb5_free_ap_rep_enc_part(context, reply);
+	  mutual_complete = 1;
+	}
+	return;
+    case KRB_FORWARD_ACCEPT:
+	printf("[ Kerberos V5 accepted forwarded credentials ]\r\n");
+	return;
+    case KRB_FORWARD_REJECT:
+	printf("[ Kerberos V5 refuses forwarded credentials because %.*s ]\r\n",
+	       cnt, data);
+	return;
+    default:
+	if (auth_debug_mode)
+	    printf("Unknown Kerberos option %d\r\n", data[-1]);
+	return;
+    }
+}
+
+int
+kerberos5_status(Authenticator *ap, char *name, size_t name_sz, int level)
+{
+    if (level < AUTH_USER)
+	return(level);
+
+    if (UserNameRequested &&
+	krb5_kuserok(context,
+		     ticket->client,
+		     UserNameRequested))
+	{
+	    strlcpy(name, UserNameRequested, name_sz);
+#if defined(DCE)
+	    dfsk5ok = 1;
+#endif
+	    return(AUTH_VALID);
+	} else
+	    return(AUTH_USER);
+}
+
+#define	BUMP(buf, len)		while (*(buf)) {++(buf), --(len);}
+#define	ADDC(buf, len, c)	if ((len) > 0) {*(buf)++ = (c); --(len);}
+
+void
+kerberos5_printsub(unsigned char *data, int cnt, unsigned char *buf, int buflen)
+{
+    int i;
+
+    buf[buflen-1] = '\0';		/* make sure its NULL terminated */
+    buflen -= 1;
+
+    switch(data[3]) {
+    case KRB_REJECT:		/* Rejected (reason might follow) */
+	strlcpy((char *)buf, " REJECT ", buflen);
+	goto common;
+
+    case KRB_ACCEPT:		/* Accepted (name might follow) */
+	strlcpy((char *)buf, " ACCEPT ", buflen);
+    common:
+	BUMP(buf, buflen);
+	if (cnt <= 4)
+	    break;
+	ADDC(buf, buflen, '"');
+	for (i = 4; i < cnt; i++)
+	    ADDC(buf, buflen, data[i]);
+	ADDC(buf, buflen, '"');
+	ADDC(buf, buflen, '\0');
+	break;
+
+
+    case KRB_AUTH:			/* Authentication data follows */
+	strlcpy((char *)buf, " AUTH", buflen);
+	goto common2;
+
+    case KRB_RESPONSE:
+	strlcpy((char *)buf, " RESPONSE", buflen);
+	goto common2;
+
+    case KRB_FORWARD:		/* Forwarded credentials follow */
+	strlcpy((char *)buf, " FORWARD", buflen);
+	goto common2;
+
+    case KRB_FORWARD_ACCEPT:	/* Forwarded credentials accepted */
+	strlcpy((char *)buf, " FORWARD_ACCEPT", buflen);
+	goto common2;
+
+    case KRB_FORWARD_REJECT:	/* Forwarded credentials rejected */
+	/* (reason might follow) */
+	strlcpy((char *)buf, " FORWARD_REJECT", buflen);
+	goto common2;
+
+    default:
+	snprintf(buf, buflen, " %d (unknown)", data[3]);
+    common2:
+	BUMP(buf, buflen);
+	for (i = 4; i < cnt; i++) {
+	    snprintf(buf, buflen, " %d", data[i]);
+	    BUMP(buf, buflen);
+	}
+	break;
+    }
+}
+
+void
+kerberos5_forward(Authenticator *ap)
+{
+    krb5_error_code ret;
+    krb5_ccache     ccache;
+    krb5_creds      creds;
+    krb5_kdc_flags  flags;
+    krb5_data       out_data;
+    krb5_principal  principal;
+
+    ret = krb5_cc_default (context, &ccache);
+    if (ret) {
+	if (auth_debug_mode)
+	    printf ("KerberosV5: could not get default ccache: %s\r\n",
+		    krb5_get_err_text (context, ret));
+	return;
+    }
+
+    ret = krb5_cc_get_principal (context, ccache, &principal);
+    if (ret) {
+	if (auth_debug_mode)
+	    printf ("KerberosV5: could not get principal: %s\r\n",
+		    krb5_get_err_text (context, ret));
+	return;
+    }
+
+    memset (&creds, 0, sizeof(creds));
+
+    creds.client = principal;
+    
+    ret = krb5_build_principal (context,
+				&creds.server,
+				strlen(principal->realm),
+				principal->realm,
+				"krbtgt",
+				principal->realm,
+				NULL);
+
+    if (ret) {
+	if (auth_debug_mode)
+	    printf ("KerberosV5: could not get principal: %s\r\n",
+		    krb5_get_err_text (context, ret));
+	return;
+    }
+
+    creds.times.endtime = 0;
+
+    flags.i = 0;
+    flags.b.forwarded = 1;
+    if (forward_flags & OPTS_FORWARDABLE_CREDS)
+	flags.b.forwardable = 1;
+
+    ret = krb5_get_forwarded_creds (context,
+				    auth_context,
+				    ccache,
+				    flags.i,
+				    RemoteHostName,
+				    &creds,
+				    &out_data);
+    if (ret) {
+	if (auth_debug_mode)
+	    printf ("Kerberos V5: error getting forwarded creds: %s\r\n",
+		    krb5_get_err_text (context, ret));
+	return;
+    }
+
+    if(!Data(ap, KRB_FORWARD, out_data.data, out_data.length)) {
+	if (auth_debug_mode)
+	    printf("Not enough room for authentication data\r\n");
+    } else {
+	if (auth_debug_mode)
+	    printf("Forwarded local Kerberos V5 credentials to server\r\n");
+    }
+}
+
+#if defined(DCE)
+/* if this was a K5 authentication try and join a PAG for the user. */
+void
+kerberos5_dfspag(void)
+{
+    if (dfsk5ok) {
+	dfspag = krb5_dfs_pag(context, dfsfwd, ticket->client,
+			      UserNameRequested);
+    }
+}
+#endif
+
+int
+kerberos5_set_forward(int on)
+{
+    if(on == 0)
+	forward_flags &= ~OPTS_FORWARD_CREDS;
+    if(on == 1)
+	forward_flags |= OPTS_FORWARD_CREDS;
+    if(on == -1)
+	forward_flags ^= OPTS_FORWARD_CREDS;
+    return 0;
+}
+
+int
+kerberos5_set_forwardable(int on)
+{
+    if(on == 0)
+	forward_flags &= ~OPTS_FORWARDABLE_CREDS;
+    if(on == 1)
+	forward_flags |= OPTS_FORWARDABLE_CREDS;
+    if(on == -1)
+	forward_flags ^= OPTS_FORWARDABLE_CREDS;
+    return 0;
+}
+
+#endif /* KRB5 */
diff --git a/usr.bin/telnet/misc.c b/usr.bin/telnet/misc.c
new file mode 100644
index 00000000000..291f8e532f2
--- /dev/null
+++ b/usr.bin/telnet/misc.c
@@ -0,0 +1,102 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  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.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
+ */
+
+#ifndef lint
+/* from: static char sccsid[] = "@(#)misc.c    8.1 (Berkeley) 6/4/93"; */
+/* from: static char rcsid[] = "$NetBSD: misc.c,v 1.5 1996/02/24 01:15:25 jtk Exp $"; */
+static char rcsid[] = "$OpenBSD: misc.c,v 1.1 2005/05/24 03:43:56 deraadt Exp $";
+#endif /* not lint */
+
+/* $KTH: misc.c,v 1.15 2000/01/25 23:24:58 assar Exp $ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <err.h>
+#include "misc.h"
+#include "auth.h"
+#include "encrypt.h"
+
+
+const char *RemoteHostName;
+const char *LocalHostName;
+char *UserNameRequested = 0;
+int ConnectedCount = 0;
+
+void
+auth_encrypt_init(const char *local, const char *remote, const char *name,
+		  int server)
+{
+    RemoteHostName = remote;
+    LocalHostName = local;
+#ifdef AUTHENTICATION
+    auth_init(name, server);
+#endif
+#ifdef ENCRYPTION
+    encrypt_init(name, server);
+#endif
+    if (UserNameRequested) {
+	free(UserNameRequested);
+	UserNameRequested = 0;
+    }
+}
+
+void
+auth_encrypt_user(const char *name)
+{
+    if (UserNameRequested)
+	free(UserNameRequested);
+    UserNameRequested = name ? strdup(name) : 0;
+}
+
+void
+auth_encrypt_connect(int cnt)
+{
+}
+
+void
+printd(const unsigned char *data, int cnt)
+{
+    if (cnt > 16)
+	cnt = 16;
+    while (cnt-- > 0) {
+	printf(" %02x", *data);
+	++data;
+    }
+}
+
+/* This is stolen from libroken; it's the only thing actually needed from
+ * libroken.
+ */
+void
+esetenv(const char *var, const char *val, int rewrite)
+{
+    if (setenv ((char *)var, (char *)val, rewrite))
+        errx (1, "failed setting environment variable %s", var);
+}