1 /* $NetBSD: auth-skey.c,v 1.5 2017/04/18 18:41:46 christos Exp $ */ 2 /* $OpenBSD: auth-skey.c,v 1.27 2007/01/21 01:41:54 stevesk Exp $ */ 3 /* 4 * Copyright (c) 2001 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 #include "includes.h" 27 __RCSID("$NetBSD: auth-skey.c,v 1.5 2017/04/18 18:41:46 christos Exp $"); 28 29 #ifdef SKEY 30 31 #include <sys/types.h> 32 33 #include <pwd.h> 34 #include <stdio.h> 35 36 #include <skey.h> 37 38 #include "xmalloc.h" 39 #include "key.h" 40 #include "hostfile.h" 41 #include "auth.h" 42 43 #ifdef GSSAPI 44 #include "buffer.h" 45 #include "ssh-gss.h" 46 #endif 47 48 #include "monitor_wrap.h" 49 50 static void * 51 skey_init_ctx(Authctxt *authctxt) 52 { 53 return authctxt; 54 } 55 56 int 57 skey_query(void *ctx, char **name, char **infotxt, 58 u_int* numprompts, char ***prompts, u_int **echo_on) 59 { 60 Authctxt *authctxt = ctx; 61 char challenge[1024]; 62 struct skey skey; 63 64 if (skeychallenge(&skey, authctxt->user, challenge, sizeof(challenge)) == -1) 65 return -1; 66 67 *name = xstrdup(""); 68 *infotxt = xstrdup(""); 69 *numprompts = 1; 70 *prompts = xcalloc(*numprompts, sizeof(char *)); 71 *echo_on = xcalloc(*numprompts, sizeof(u_int)); 72 73 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT); 74 75 return 0; 76 } 77 78 int 79 skey_respond(void *ctx, u_int numresponses, char **responses) 80 { 81 Authctxt *authctxt = ctx; 82 83 if (authctxt->valid && 84 numresponses == 1 && 85 skey_haskey(authctxt->pw->pw_name) == 0 && 86 skey_passcheck(authctxt->pw->pw_name, responses[0]) != -1) 87 return 0; 88 return -1; 89 } 90 91 static void 92 skey_free_ctx(void *ctx) 93 { 94 /* we don't have a special context */ 95 } 96 97 KbdintDevice skey_device = { 98 "skey", 99 skey_init_ctx, 100 skey_query, 101 skey_respond, 102 skey_free_ctx 103 }; 104 105 KbdintDevice mm_skey_device = { 106 "skey", 107 skey_init_ctx, 108 mm_skey_query, 109 mm_skey_respond, 110 skey_free_ctx 111 }; 112 #endif /* SKEY */ 113