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 1.5 2002/06/30 21:59:45 deraadt Exp $"); 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #ifdef BSD_AUTH 30 #include "xmalloc.h" 31 #include "auth.h" 32 #include "log.h" 33 34 static void * 35 bsdauth_init_ctx(Authctxt *authctxt) 36 { 37 return authctxt; 38 } 39 40 int 41 bsdauth_query(void *ctx, char **name, char **infotxt, 42 u_int *numprompts, char ***prompts, u_int **echo_on) 43 { 44 Authctxt *authctxt = ctx; 45 char *challenge = NULL; 46 47 if (authctxt->as != NULL) { 48 debug2("bsdauth_query: try reuse session"); 49 challenge = auth_getitem(authctxt->as, AUTHV_CHALLENGE); 50 if (challenge == NULL) { 51 auth_close(authctxt->as); 52 authctxt->as = NULL; 53 } 54 } 55 56 if (challenge == NULL) { 57 debug2("bsdauth_query: new bsd auth session"); 58 debug3("bsdauth_query: style %s", 59 authctxt->style ? authctxt->style : "<default>"); 60 authctxt->as = auth_userchallenge(authctxt->user, 61 authctxt->style, "auth-ssh", &challenge); 62 if (authctxt->as == NULL) 63 challenge = NULL; 64 debug2("bsdauth_query: <%s>", challenge ? challenge : "empty"); 65 } 66 67 if (challenge == NULL) 68 return -1; 69 70 *name = xstrdup(""); 71 *infotxt = xstrdup(""); 72 *numprompts = 1; 73 *prompts = xmalloc(*numprompts * sizeof(char *)); 74 *echo_on = xmalloc(*numprompts * sizeof(u_int)); 75 (*echo_on)[0] = 0; 76 (*prompts)[0] = xstrdup(challenge); 77 78 return 0; 79 } 80 81 int 82 bsdauth_respond(void *ctx, u_int numresponses, char **responses) 83 { 84 Authctxt *authctxt = ctx; 85 int authok; 86 87 if (authctxt->as == 0) 88 error("bsdauth_respond: no bsd auth session"); 89 90 if (numresponses != 1) 91 return -1; 92 93 authok = auth_userresponse(authctxt->as, responses[0], 0); 94 authctxt->as = NULL; 95 debug3("bsdauth_respond: <%s> = <%d>", responses[0], authok); 96 97 return (authok == 0) ? -1 : 0; 98 } 99 100 static void 101 bsdauth_free_ctx(void *ctx) 102 { 103 Authctxt *authctxt = ctx; 104 105 if (authctxt && authctxt->as) { 106 auth_close(authctxt->as); 107 authctxt->as = NULL; 108 } 109 } 110 111 KbdintDevice bsdauth_device = { 112 "bsdauth", 113 bsdauth_init_ctx, 114 bsdauth_query, 115 bsdauth_respond, 116 bsdauth_free_ctx 117 }; 118 119 KbdintDevice mm_bsdauth_device = { 120 "bsdauth", 121 bsdauth_init_ctx, 122 mm_bsdauth_query, 123 mm_bsdauth_respond, 124 bsdauth_free_ctx 125 }; 126 #endif 127