/* $OpenBSD: auth-bsdauth.c,v 1.11 2007/09/21 08:15:29 djm Exp $ */ /* * Copyright (c) 2001 Markus Friedl. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "includes.h" #include <sys/types.h> #include <stdarg.h> #ifdef BSD_AUTH #include "xmalloc.h" #include "key.h" #include "hostfile.h" #include "auth.h" #include "log.h" #include "buffer.h" #ifdef GSSAPI #include "ssh-gss.h" #endif #include "monitor_wrap.h" static void * bsdauth_init_ctx(Authctxt *authctxt) { return authctxt; } int bsdauth_query(void *ctx, char **name, char **infotxt, u_int *numprompts, char ***prompts, u_int **echo_on) { Authctxt *authctxt = ctx; char *challenge = NULL; if (authctxt->as != NULL) { debug2("bsdauth_query: try reuse session"); challenge = auth_getitem(authctxt->as, AUTHV_CHALLENGE); if (challenge == NULL) { auth_close(authctxt->as); authctxt->as = NULL; } } if (challenge == NULL) { debug2("bsdauth_query: new bsd auth session"); debug3("bsdauth_query: style %s", authctxt->style ? authctxt->style : "<default>"); authctxt->as = auth_userchallenge(authctxt->user, authctxt->style, "auth-ssh", &challenge); if (authctxt->as == NULL) challenge = NULL; debug2("bsdauth_query: <%s>", challenge ? challenge : "empty"); } if (challenge == NULL) return -1; *name = xstrdup(""); *infotxt = xstrdup(""); *numprompts = 1; *prompts = xcalloc(*numprompts, sizeof(char *)); *echo_on = xcalloc(*numprompts, sizeof(u_int)); (*prompts)[0] = xstrdup(challenge); return 0; } int bsdauth_respond(void *ctx, u_int numresponses, char **responses) { Authctxt *authctxt = ctx; int authok; if (!authctxt->valid) return -1; if (authctxt->as == 0) error("bsdauth_respond: no bsd auth session"); if (numresponses != 1) return -1; authok = auth_userresponse(authctxt->as, responses[0], 0); authctxt->as = NULL; debug3("bsdauth_respond: <%s> = <%d>", responses[0], authok); return (authok == 0) ? -1 : 0; } static void bsdauth_free_ctx(void *ctx) { Authctxt *authctxt = ctx; if (authctxt && authctxt->as) { auth_close(authctxt->as); authctxt->as = NULL; } } KbdintDevice bsdauth_device = { "bsdauth", bsdauth_init_ctx, bsdauth_query, bsdauth_respond, bsdauth_free_ctx }; KbdintDevice mm_bsdauth_device = { "bsdauth", bsdauth_init_ctx, mm_bsdauth_query, mm_bsdauth_respond, bsdauth_free_ctx }; #endif