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 1.2 2001/12/19 07:18:56 deraadt Exp $"); 26 27 #ifdef BSD_AUTH 28 #include "xmalloc.h" 29 #include "auth.h" 30 #include "log.h" 31 32 static void * 33 bsdauth_init_ctx(Authctxt *authctxt) 34 { 35 return authctxt; 36 } 37 38 static int 39 bsdauth_query(void *ctx, char **name, char **infotxt, 40 u_int *numprompts, char ***prompts, u_int **echo_on) 41 { 42 Authctxt *authctxt = ctx; 43 char *challenge = NULL; 44 45 if (authctxt->as != NULL) { 46 debug2("bsdauth_query: try reuse session"); 47 challenge = auth_getitem(authctxt->as, AUTHV_CHALLENGE); 48 if (challenge == NULL) { 49 auth_close(authctxt->as); 50 authctxt->as = NULL; 51 } 52 } 53 54 if (challenge == NULL) { 55 debug2("bsdauth_query: new bsd auth session"); 56 debug3("bsdauth_query: style %s", 57 authctxt->style ? authctxt->style : "<default>"); 58 authctxt->as = auth_userchallenge(authctxt->user, 59 authctxt->style, "auth-ssh", &challenge); 60 if (authctxt->as == NULL) 61 challenge = NULL; 62 debug2("bsdauth_query: <%s>", challenge ? challenge : "empty"); 63 } 64 65 if (challenge == NULL) 66 return -1; 67 68 *name = xstrdup(""); 69 *infotxt = xstrdup(""); 70 *numprompts = 1; 71 *prompts = xmalloc(*numprompts * sizeof(char*)); 72 *echo_on = xmalloc(*numprompts * sizeof(u_int)); 73 (*echo_on)[0] = 0; 74 (*prompts)[0] = xstrdup(challenge); 75 76 return 0; 77 } 78 79 static int 80 bsdauth_respond(void *ctx, u_int numresponses, char **responses) 81 { 82 Authctxt *authctxt = ctx; 83 int authok; 84 85 if (authctxt->as == 0) 86 error("bsdauth_respond: no bsd auth session"); 87 88 if (numresponses != 1) 89 return -1; 90 91 authok = auth_userresponse(authctxt->as, responses[0], 0); 92 authctxt->as = NULL; 93 debug3("bsdauth_respond: <%s> = <%d>", responses[0], authok); 94 95 return (authok == 0) ? -1 : 0; 96 } 97 98 static void 99 bsdauth_free_ctx(void *ctx) 100 { 101 Authctxt *authctxt = ctx; 102 103 if (authctxt && authctxt->as) { 104 auth_close(authctxt->as); 105 authctxt->as = NULL; 106 } 107 } 108 109 KbdintDevice bsdauth_device = { 110 "bsdauth", 111 bsdauth_init_ctx, 112 bsdauth_query, 113 bsdauth_respond, 114 bsdauth_free_ctx 115 }; 116 #endif 117