auth-skey.c

   1 /* $OpenBSD: auth-skey.c,v 1.23 2006/03/25 13:17:01 djm Exp $ */
   2 /*
   3  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  17  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25 #include "includes.h"
  26
  27 #ifdef SKEY
  28
  29 #include <skey.h>
  30
  31 #include "xmalloc.h"
  32 #include "auth.h"
  33 #include "monitor_wrap.h"
  34
  35 static void *
  36 skey_init_ctx(Authctxt *authctxt)
  37 {
  38         return authctxt;
  39 }
  40
  41 int
  42 skey_query(void *ctx, char **name, char **infotxt,
  43     u_int* numprompts, char ***prompts, u_int **echo_on)
  44 {
  45         Authctxt *authctxt = ctx;
  46         char challenge[1024], *p;
  47         int len;
  48         struct skey skey;
  49
  50         if (_compat_skeychallenge(&skey, authctxt->user, challenge,
  51             sizeof(challenge)) == -1)
  52                 return -1;
  53
  54         *name  = xstrdup("");
  55         *infotxt  = xstrdup("");
  56         *numprompts = 1;
  57         *prompts = xcalloc(*numprompts, sizeof(char *));
  58         *echo_on = xcalloc(*numprompts, sizeof(u_int));
  59
  60         xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
  61
  62         return 0;
  63 }
  64
  65 int
  66 skey_respond(void *ctx, u_int numresponses, char **responses)
  67 {
  68         Authctxt *authctxt = ctx;
  69
  70         if (authctxt->valid &&
  71             numresponses == 1 &&
  72             skey_haskey(authctxt->pw->pw_name) == 0 &&
  73             skey_passcheck(authctxt->pw->pw_name, responses[0]) != -1)
  74             return 0;
  75         return -1;
  76 }
  77
  78 static void
  79 skey_free_ctx(void *ctx)
  80 {
  81         /* we don't have a special context */
  82 }
  83
  84 KbdintDevice skey_device = {
  85         "skey",
  86         skey_init_ctx,
  87         skey_query,
  88         skey_respond,
  89         skey_free_ctx
  90 };
  91
  92 KbdintDevice mm_skey_device = {
  93         "skey",
  94         skey_init_ctx,
  95         mm_skey_query,
  96         mm_skey_respond,
  97         skey_free_ctx
  98 };
  99 #endif /* SKEY */