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/* $OpenBSD: auth-bsdauth.c,v 1.14 2015/10/20 23:24:25 mmcc Exp $ */ |
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/* |
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* Copyright (c) 2001 Markus Friedl. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include <sys/types.h> |
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#include <stdarg.h> |
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#include <stdio.h> |
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#include "xmalloc.h" |
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#include "key.h" |
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#include "hostfile.h" |
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#include "auth.h" |
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#include "log.h" |
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#include "buffer.h" |
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#ifdef GSSAPI |
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#include "ssh-gss.h" |
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#endif |
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#include "monitor_wrap.h" |
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static void * |
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bsdauth_init_ctx(Authctxt *authctxt) |
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{ |
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return authctxt; |
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} |
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int |
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bsdauth_query(void *ctx, char **name, char **infotxt, |
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u_int *numprompts, char ***prompts, u_int **echo_on) |
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{ |
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Authctxt *authctxt = ctx; |
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char *challenge = NULL; |
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*infotxt = NULL; |
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*numprompts = 0; |
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*prompts = NULL; |
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*echo_on = NULL; |
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if (authctxt->as != NULL) { |
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debug2("bsdauth_query: try reuse session"); |
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challenge = auth_getitem(authctxt->as, AUTHV_CHALLENGE); |
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if (challenge == NULL) { |
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auth_close(authctxt->as); |
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authctxt->as = NULL; |
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} |
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} |
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if (challenge == NULL) { |
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debug2("bsdauth_query: new bsd auth session"); |
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debug3("bsdauth_query: style %s", |
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authctxt->style ? authctxt->style : "<default>"); |
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authctxt->as = auth_userchallenge(authctxt->user, |
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authctxt->style, "auth-ssh", &challenge); |
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if (authctxt->as == NULL) |
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challenge = NULL; |
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debug2("bsdauth_query: <%s>", challenge ? challenge : "empty"); |
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} |
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if (challenge == NULL) |
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return -1; |
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*name = xstrdup(""); |
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*infotxt = xstrdup(""); |
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*numprompts = 1; |
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*prompts = xcalloc(*numprompts, sizeof(char *)); |
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*echo_on = xcalloc(*numprompts, sizeof(u_int)); |
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(*prompts)[0] = xstrdup(challenge); |
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return 0; |
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} |
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int |
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bsdauth_respond(void *ctx, u_int numresponses, char **responses) |
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{ |
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Authctxt *authctxt = ctx; |
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int authok; |
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if (!authctxt->valid) |
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return -1; |
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if (authctxt->as == NULL) |
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error("bsdauth_respond: no bsd auth session"); |
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if (numresponses != 1) |
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return -1; |
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authok = auth_userresponse(authctxt->as, responses[0], 0); |
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authctxt->as = NULL; |
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debug3("bsdauth_respond: <%s> = <%d>", responses[0], authok); |
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return (authok == 0) ? -1 : 0; |
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} |
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static void |
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bsdauth_free_ctx(void *ctx) |
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{ |
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Authctxt *authctxt = ctx; |
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if (authctxt && authctxt->as) { |
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auth_close(authctxt->as); |
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authctxt->as = NULL; |
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} |
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} |
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KbdintDevice bsdauth_device = { |
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"bsdauth", |
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bsdauth_init_ctx, |
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bsdauth_query, |
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bsdauth_respond, |
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bsdauth_free_ctx |
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}; |
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KbdintDevice mm_bsdauth_device = { |
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"bsdauth", |
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bsdauth_init_ctx, |
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mm_bsdauth_query, |
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mm_bsdauth_respond, |
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bsdauth_free_ctx |
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}; |