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