source: trunk/third/openssh/auth-skey.c @ 18759

/*
 * 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-skey.c,v 1.20 2002/06/30 21:59:45 deraadt Exp $");

#ifdef SKEY

#include <skey.h>

#include "xmalloc.h"
#include "auth.h"
#include "monitor_wrap.h"

static void *
skey_init_ctx(Authctxt *authctxt)
{
        return authctxt;
}

int
skey_query(void *ctx, char **name, char **infotxt,
    u_int* numprompts, char ***prompts, u_int **echo_on)
{
        Authctxt *authctxt = ctx;
        char challenge[1024], *p;
        int len;
        struct skey skey;

        if (skeychallenge(&skey, authctxt->user, challenge) == -1)
                return -1;

        *name  = xstrdup("");
        *infotxt  = xstrdup("");
        *numprompts = 1;
        *prompts = xmalloc(*numprompts * sizeof(char *));
        *echo_on = xmalloc(*numprompts * sizeof(u_int));
        (*echo_on)[0] = 0;

        len = strlen(challenge) + strlen(SKEY_PROMPT) + 1;
        p = xmalloc(len);
        strlcpy(p, challenge, len);
        strlcat(p, SKEY_PROMPT, len);
        (*prompts)[0] = p;

        return 0;
}

int
skey_respond(void *ctx, u_int numresponses, char **responses)
{
        Authctxt *authctxt = ctx;

        if (authctxt->valid &&
            numresponses == 1 &&
            skey_haskey(authctxt->pw->pw_name) == 0 &&
            skey_passcheck(authctxt->pw->pw_name, responses[0]) != -1)
            return 0;
        return -1;
}

static void
skey_free_ctx(void *ctx)
{
        /* we don't have a special context */
}

KbdintDevice skey_device = {
        "skey",
        skey_init_ctx,
        skey_query,
        skey_respond,
        skey_free_ctx
};

KbdintDevice mm_skey_device = {
        "skey",
        skey_init_ctx,
        mm_skey_query,
        mm_skey_respond,
        skey_free_ctx
};
#endif /* SKEY */