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/*
* 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"
RCSID("$OpenBSD: auth-chall.c,v 1.7 2001/04/05 10:42:47 markus Exp $");
#include "auth.h"
#include "log.h"
#ifdef BSD_AUTH
char *
get_challenge(Authctxt *authctxt, char *devs)
{
char *challenge;
if (authctxt->as != NULL) {
debug2("try reuse session");
challenge = auth_getitem(authctxt->as, AUTHV_CHALLENGE);
if (challenge != NULL) {
debug2("reuse bsd auth session");
return challenge;
}
auth_close(authctxt->as);
authctxt->as = NULL;
}
debug2("new bsd auth session");
if (devs == NULL || strlen(devs) == 0)
devs = authctxt->style;
debug3("bsd auth: devs %s", devs ? devs : "<default>");
authctxt->as = auth_userchallenge(authctxt->user, devs, "auth-ssh",
&challenge);
if (authctxt->as == NULL)
return NULL;
debug2("get_challenge: <%s>", challenge ? challenge : "EMPTY");
return challenge;
}
int
verify_response(Authctxt *authctxt, char *response)
{
int authok;
if (authctxt->as == 0)
error("verify_response: no bsd auth session");
authok = auth_userresponse(authctxt->as, response, 0);
authctxt->as = NULL;
debug("verify_response: <%s> = <%d>", response, authok);
return authok != 0;
}
#else
#ifdef SKEY
#include <skey.h>
char *
get_challenge(Authctxt *authctxt, char *devs)
{
static char challenge[1024];
struct skey skey;
if (skeychallenge(&skey, authctxt->user, challenge) == -1)
return NULL;
strlcat(challenge, "\nS/Key Password: ", sizeof challenge);
return challenge;
}
int
verify_response(Authctxt *authctxt, char *response)
{
return (authctxt->valid &&
skey_haskey(authctxt->pw->pw_name) == 0 &&
skey_passcheck(authctxt->pw->pw_name, response) != -1);
}
#else
/* not available */
char *
get_challenge(Authctxt *authctxt, char *devs)
{
return NULL;
}
int
verify_response(Authctxt *authctxt, char *response)
{
return 0;
}
#endif
#endif
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