crypto/external/bsd/openssh/dist/auth-skey.c

   1 /*      $NetBSD: auth-skey.c,v 1.14 2008/04/06 23:39:05 christos 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 1.14 2008/04/06 23:39:05 christos 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 */