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Revision 1.14, Sun Dec 19 22:12:07 2021 UTC (2 years, 4 months ago) by djm
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE, OPENBSD_7_5, OPENBSD_7_4_BASE, OPENBSD_7_4, OPENBSD_7_3_BASE, OPENBSD_7_3, OPENBSD_7_2_BASE, OPENBSD_7_2, OPENBSD_7_1_BASE, OPENBSD_7_1
Changes since 1.13: +3 -2 lines

prepare for multiple names for authmethods

allow authentication methods to have one additional name beyond their
primary name.

allow lookup by this synonym

Use primary name for authentication decisions, e.g. for
PermitRootLogin=publickey

Pass actual invoked name to the authmethods, so they can tell whether they
were requested via the their primary name or synonym.

ok markus@

/* $OpenBSD: auth2-kbdint.c,v 1.14 2021/12/19 22:12:07 djm Exp $ */
/*
 * Copyright (c) 2000 Markus Friedl.  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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

#include <sys/types.h>

#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>

#include "xmalloc.h"
#include "packet.h"
#include "hostfile.h"
#include "auth.h"
#include "log.h"
#include "misc.h"
#include "servconf.h"
#include "ssherr.h"

/* import */
extern ServerOptions options;

static int
userauth_kbdint(struct ssh *ssh, const char *method)
{
	int r, authenticated = 0;
	char *lang, *devs;

	if ((r = sshpkt_get_cstring(ssh, &lang, NULL)) != 0 ||
	    (r = sshpkt_get_cstring(ssh, &devs, NULL)) != 0 ||
	    (r = sshpkt_get_end(ssh)) != 0)
		fatal_fr(r, "parse packet");

	debug("keyboard-interactive devs %s", devs);

	if (options.kbd_interactive_authentication)
		authenticated = auth2_challenge(ssh, devs);

	free(devs);
	free(lang);
	return authenticated;
}

Authmethod method_kbdint = {
	"keyboard-interactive",
	NULL,
	userauth_kbdint,
	&options.kbd_interactive_authentication
};