1 /* $NetBSD: auth2-kbdint.c,v 1.15 2022/02/23 19:07:20 christos Exp $ */ 2 /* $OpenBSD: auth2-kbdint.c,v 1.14 2021/12/19 22:12:07 djm Exp $ */ 3 /* 4 * Copyright (c) 2000 Markus Friedl. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include "includes.h" 28 __RCSID("$NetBSD: auth2-kbdint.c,v 1.15 2022/02/23 19:07:20 christos Exp $"); 29 #include <sys/types.h> 30 31 #include <stdlib.h> 32 #include <stdio.h> 33 #include <stdarg.h> 34 35 #include "xmalloc.h" 36 #include "packet.h" 37 #include "hostfile.h" 38 #include "auth.h" 39 #include "log.h" 40 #include "misc.h" 41 #include "servconf.h" 42 #include "ssherr.h" 43 44 /* import */ 45 extern ServerOptions options; 46 47 static int 48 userauth_kbdint(struct ssh *ssh, const char *method) 49 { 50 int r, authenticated = 0; 51 char *lang, *devs; 52 53 if ((r = sshpkt_get_cstring(ssh, &lang, NULL)) != 0 || 54 (r = sshpkt_get_cstring(ssh, &devs, NULL)) != 0 || 55 (r = sshpkt_get_end(ssh)) != 0) 56 fatal_fr(r, "parse packet"); 57 58 debug("keyboard-interactive devs %s", devs); 59 60 if (options.kbd_interactive_authentication) 61 authenticated = auth2_challenge(ssh, devs); 62 63 free(devs); 64 free(lang); 65 return authenticated; 66 } 67 68 Authmethod method_kbdint = { 69 "keyboard-interactive", 70 NULL, 71 userauth_kbdint, 72 &options.kbd_interactive_authentication 73 }; 74