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144 lines
3.6 KiB
C
144 lines
3.6 KiB
C
/* $OpenBSD: auth-bsdauth.c,v 1.15 2018/07/09 21:35:50 markus 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 "includes.h"
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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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#ifdef BSD_AUTH
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#include "xmalloc.h"
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#include "sshkey.h"
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#include "sshbuf.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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#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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};
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#endif
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