1 /* 2 * Copyright (c) 2001 Markus Friedl. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 */ 24 #include "includes.h" 25 RCSID("$OpenBSD: auth-bsdauth.c,v 1.6 2005/01/19 13:11:47 dtucker Exp $"); 26 27 #ifdef BSD_AUTH 28 #include "xmalloc.h" 29 #include "auth.h" 30 #include "log.h" 31 #include "monitor_wrap.h" 32 33 static void * 34 bsdauth_init_ctx(Authctxt *authctxt) 35 { 36 return authctxt; 37 } 38 39 int 40 bsdauth_query(void *ctx, char **name, char **infotxt, 41 u_int *numprompts, char ***prompts, u_int **echo_on) 42 { 43 Authctxt *authctxt = ctx; 44 char *challenge = NULL; 45 46 if (authctxt->as != NULL) { 47 debug2("bsdauth_query: try reuse session"); 48 challenge = auth_getitem(authctxt->as, AUTHV_CHALLENGE); 49 if (challenge == NULL) { 50 auth_close(authctxt->as); 51 authctxt->as = NULL; 52 } 53 } 54 55 if (challenge == NULL) { 56 debug2("bsdauth_query: new bsd auth session"); 57 debug3("bsdauth_query: style %s", 58 authctxt->style ? authctxt->style : "<default>"); 59 authctxt->as = auth_userchallenge(authctxt->user, 60 authctxt->style, "auth-ssh", &challenge); 61 if (authctxt->as == NULL) 62 challenge = NULL; 63 debug2("bsdauth_query: <%s>", challenge ? challenge : "empty"); 64 } 65 66 if (challenge == NULL) 67 return -1; 68 69 *name = xstrdup(""); 70 *infotxt = xstrdup(""); 71 *numprompts = 1; 72 *prompts = xmalloc(*numprompts * sizeof(char *)); 73 *echo_on = xmalloc(*numprompts * sizeof(u_int)); 74 (*echo_on)[0] = 0; 75 (*prompts)[0] = xstrdup(challenge); 76 77 return 0; 78 } 79 80 int 81 bsdauth_respond(void *ctx, u_int numresponses, char **responses) 82 { 83 Authctxt *authctxt = ctx; 84 int authok; 85 86 if (!authctxt->valid) 87 return -1; 88 89 if (authctxt->as == 0) 90 error("bsdauth_respond: no bsd auth session"); 91 92 if (numresponses != 1) 93 return -1; 94 95 authok = auth_userresponse(authctxt->as, responses[0], 0); 96 authctxt->as = NULL; 97 debug3("bsdauth_respond: <%s> = <%d>", responses[0], authok); 98 99 return (authok == 0) ? -1 : 0; 100 } 101 102 static void 103 bsdauth_free_ctx(void *ctx) 104 { 105 Authctxt *authctxt = ctx; 106 107 if (authctxt && authctxt->as) { 108 auth_close(authctxt->as); 109 authctxt->as = NULL; 110 } 111 } 112 113 KbdintDevice bsdauth_device = { 114 "bsdauth", 115 bsdauth_init_ctx, 116 bsdauth_query, 117 bsdauth_respond, 118 bsdauth_free_ctx 119 }; 120 121 KbdintDevice mm_bsdauth_device = { 122 "bsdauth", 123 bsdauth_init_ctx, 124 mm_bsdauth_query, 125 mm_bsdauth_respond, 126 bsdauth_free_ctx 127 }; 128 #endif 129