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      1 /*
      2  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     14  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     15  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     16  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     17  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     18  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     19  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     20  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     22  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     23  */
     24 #include "includes.h"
     25 RCSID("$OpenBSD: auth-skey.c,v 1.20 2002/06/30 21:59:45 deraadt Exp $");
     26 
     27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     28 
     29 #ifdef SKEY
     30 
     31 #include <skey.h>
     32 
     33 #include "xmalloc.h"
     34 #include "auth.h"
     35 
     36 static void *
     37 skey_init_ctx(Authctxt *authctxt)
     38 {
     39 	return authctxt;
     40 }
     41 
     42 int
     43 skey_query(void *ctx, char **name, char **infotxt,
     44     u_int* numprompts, char ***prompts, u_int **echo_on)
     45 {
     46 	Authctxt *authctxt = ctx;
     47 	char challenge[1024], *p;
     48 	int len;
     49 	struct skey skey;
     50 
     51 	if (skeychallenge(&skey, authctxt->user, challenge) == -1)
     52 		return -1;
     53 
     54 	*name  = xstrdup("");
     55 	*infotxt  = xstrdup("");
     56 	*numprompts = 1;
     57 	*prompts = xmalloc(*numprompts * sizeof(char *));
     58 	*echo_on = xmalloc(*numprompts * sizeof(u_int));
     59 	(*echo_on)[0] = 0;
     60 
     61 	len = strlen(challenge) + strlen(SKEY_PROMPT) + 1;
     62 	p = xmalloc(len);
     63 	strlcpy(p, challenge, len);
     64 	strlcat(p, SKEY_PROMPT, len);
     65 	(*prompts)[0] = p;
     66 
     67 	return 0;
     68 }
     69 
     70 int
     71 skey_respond(void *ctx, u_int numresponses, char **responses)
     72 {
     73 	Authctxt *authctxt = ctx;
     74 
     75 	if (authctxt->valid &&
     76 	    numresponses == 1 &&
     77 	    skey_haskey(authctxt->pw->pw_name) == 0 &&
     78 	    skey_passcheck(authctxt->pw->pw_name, responses[0]) != -1)
     79 	    return 0;
     80 	return -1;
     81 }
     82 
     83 static void
     84 skey_free_ctx(void *ctx)
     85 {
     86 	/* we don't have a special context */
     87 }
     88 
     89 KbdintDevice skey_device = {
     90 	"skey",
     91 	skey_init_ctx,
     92 	skey_query,
     93 	skey_respond,
     94 	skey_free_ctx
     95 };
     96 
     97 KbdintDevice mm_skey_device = {
     98 	"skey",
     99 	skey_init_ctx,
    100 	mm_skey_query,
    101 	mm_skey_respond,
    102 	skey_free_ctx
    103 };
    104 #endif /* SKEY */
    105