sunrpc/publickey.c

   1 /* Get public or secret key from key server.
   2    Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Library General Public License as
   8    published by the Free Software Foundation; either version 2 of the
   9    License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Library General Public License for more details.
  15
  16    You should have received a copy of the GNU Library General Public
  17    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  18    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include <errno.h>
  22 #include <rpc/netdb.h>
  23
  24 #include "nsswitch.h"
  25
  26
  27 /* Type of the lookup function for the public key.  */
  28 typedef int (*public_function) (const char *, char *, int *);
  29
  30 /* Type of the lookup function for the secret key.  */
  31 typedef int (*secret_function) (const char *, char *, const char *, int *);
  32
  33 /* The lookup function for the first entry of this service.  */
  34 extern int __nss_publickey_lookup (service_user **nip, const char *name,
  35                                    void **fctp);
  36
  37
  38 int
  39 getpublickey (const char *name, char *key)
  40 {
  41   static service_user *startp = NULL;
  42   static public_function start_fct;
  43   service_user *nip;
  44   public_function fct;
  45   enum nss_status status = NSS_STATUS_UNAVAIL;
  46   int no_more;
  47
  48   if (startp == NULL)
  49     {
  50       no_more = __nss_publickey_lookup (&nip, "getpublickey", (void **) &fct);
  51       if (no_more)
  52         startp = (service_user *) -1;
  53       else
  54         {
  55           startp = nip;
  56           start_fct = fct;
  57         }
  58     }
  59   else
  60     {
  61       fct = start_fct;
  62       no_more = (nip = startp) == (service_user *) -1;
  63     }
  64
  65   while (! no_more)
  66     {
  67       status = (*fct) (name, key, &errno);
  68
  69       no_more = __nss_next (&nip, "getpublickey", (void **) &fct, status, 0);
  70     }
  71
  72   return status == NSS_STATUS_SUCCESS;
  73 }
  74
  75
  76 int
  77 getsecretkey (const char *name, char *key, const char *passwd)
  78 {
  79   static service_user *startp = NULL;
  80   static secret_function start_fct;
  81   service_user *nip;
  82   secret_function fct;
  83   enum nss_status status = NSS_STATUS_UNAVAIL;
  84   int no_more;
  85
  86   if (startp == NULL)
  87     {
  88       no_more = __nss_publickey_lookup (&nip, "getsecretkey", (void **) &fct);
  89       if (no_more)
  90         startp = (service_user *) -1;
  91       else
  92         {
  93           startp = nip;
  94           start_fct = fct;
  95         }
  96     }
  97   else
  98     {
  99       fct = start_fct;
 100       no_more = (nip = startp) == (service_user *) -1;
 101     }
 102
 103   while (! no_more)
 104     {
 105       status = (*fct) (name, key, passwd, __errno_location ());
 106
 107       no_more = __nss_next (&nip, "getsecretkey", (void **) &fct, status, 0);
 108     }
 109
 110   return status == NSS_STATUS_SUCCESS;
 111 }