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auth-skey.c revision 1.3.2.1 
      1 /*	$NetBSD: auth-skey.c,v 1.3.2.1 2017/01/07 08:53:41 pgoyette Exp $	*/
      2 /* $OpenBSD: auth-skey.c,v 1.27 2007/01/21 01:41:54 stevesk Exp $ */
      3 /*
      4  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 #include "includes.h"
     27 __RCSID("$NetBSD: auth-skey.c,v 1.3.2.1 2017/01/07 08:53:41 pgoyette Exp $");
     28 
     29 #ifdef SKEY
     30 
     31 #include <sys/types.h>
     32 
     33 #include <pwd.h>
     34 #include <stdio.h>
     35 
     36 #include <skey.h>
     37 
     38 #include "xmalloc.h"
     39 #include "key.h"
     40 #include "hostfile.h"
     41 #include "auth.h"
     42 
     43 #ifdef GSSAPI
     44 #include "buffer.h"
     45 #include "ssh-gss.h"
     46 #endif
     47 
     48 #include "monitor_wrap.h"
     49 
     50 static void *
     51 skey_init_ctx(Authctxt *authctxt)
     52 {
     53 	return authctxt;
     54 }
     55 
     56 int
     57 skey_query(void *ctx, char **name, char **infotxt,
     58     u_int* numprompts, char ***prompts, u_int **echo_on)
     59 {
     60 	Authctxt *authctxt = ctx;
     61 	char challenge[1024];
     62 	struct skey skey;
     63 
     64 	if (skeychallenge(&skey, authctxt->user, challenge, sizeof(challenge)) == -1)
     65 		return -1;
     66 
     67 	*name = xstrdup("");
     68 	*infotxt = xstrdup("");
     69 	*numprompts = 1;
     70 	*prompts = xcalloc(*numprompts, sizeof(char *));
     71 	*echo_on = xcalloc(*numprompts, sizeof(u_int));
     72 
     73 	xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
     74 
     75 	return 0;
     76 }
     77 
     78 int
     79 skey_respond(void *ctx, u_int numresponses, char **responses)
     80 {
     81 	Authctxt *authctxt = ctx;
     82 
     83 	if (authctxt->valid &&
     84 	    numresponses == 1 &&
     85 	    skey_haskey(authctxt->pw->pw_name) == 0 &&
     86 	    skey_passcheck(authctxt->pw->pw_name, responses[0]) != -1)
     87 	    return 0;
     88 	return -1;
     89 }
     90 
     91 static void
     92 skey_free_ctx(void *ctx)
     93 {
     94 	/* we don't have a special context */
     95 }
     96 
     97 KbdintDevice skey_device = {
     98 	"skey",
     99 	skey_init_ctx,
    100 	skey_query,
    101 	skey_respond,
    102 	skey_free_ctx
    103 };
    104 
    105 KbdintDevice mm_skey_device = {
    106 	"skey",
    107 	skey_init_ctx,
    108 	mm_skey_query,
    109 	mm_skey_respond,
    110 	skey_free_ctx
    111 };
    112 #endif /* SKEY */
    113