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/* $OpenBSD: auth-bsdauth.c,v 1.14 2015/10/20 23:24:25 mmcc 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 <sys/types.h>
#include <stdarg.h>
#include <stdio.h>
#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;
*infotxt = NULL;
*numprompts = 0;
*prompts = NULL;
*echo_on = 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 == NULL)
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
};
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