sunrpc/publickey.c

   1 /* Get public or secret key from key server.
   2    Copyright (C) 1996, 1997, 1998, 1999, 2002 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 Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the 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    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <errno.h>
  22 #include <rpc/netdb.h>
  23 #include <rpc/auth_des.h>
  24
  25 #include "nsswitch.h"
  26
  27
  28 /* Type of the lookup function for the public key.  */
  29 typedef int (*public_function) (const char *, char *, int *);
  30
  31 /* Type of the lookup function for the secret key.  */
  32 typedef int (*secret_function) (const char *, char *, const char *, int *);
  33
  34 /* The lookup function for the first entry of this service.  */
  35 extern int __nss_publickey_lookup (service_user **nip, const char *name,
  36                                    void **fctp) internal_function;
  37
  38
  39 int
  40 getpublickey (const char *name, char *key)
  41 {
  42   static service_user *startp;
  43   static public_function start_fct;
  44   service_user *nip;
  45   public_function fct;
  46   enum nss_status status = NSS_STATUS_UNAVAIL;
  47   int no_more;
  48
  49   if (startp == NULL)
  50     {
  51       no_more = __nss_publickey_lookup (&nip, "getpublickey", (void **) &fct);
  52       if (no_more)
  53         startp = (service_user *) -1;
  54       else
  55         {
  56           startp = nip;
  57           start_fct = fct;
  58         }
  59     }
  60   else
  61     {
  62       fct = start_fct;
  63       no_more = (nip = startp) == (service_user *) -1;
  64     }
  65
  66   while (! no_more)
  67     {
  68       status = (*fct) (name, key, &errno);
  69
  70       no_more = __nss_next (&nip, "getpublickey", (void **) &fct, status, 0);
  71     }
  72
  73   return status == NSS_STATUS_SUCCESS;
  74 }
  75 libc_hidden_def (getpublickey)
  76
  77
  78 int
  79 getsecretkey (const char *name, char *key, const char *passwd)
  80 {
  81   static service_user *startp;
  82   static secret_function start_fct;
  83   service_user *nip;
  84   secret_function fct;
  85   enum nss_status status = NSS_STATUS_UNAVAIL;
  86   int no_more;
  87
  88   if (startp == NULL)
  89     {
  90       no_more = __nss_publickey_lookup (&nip, "getsecretkey", (void **) &fct);
  91       if (no_more)
  92         startp = (service_user *) -1;
  93       else
  94         {
  95           startp = nip;
  96           start_fct = fct;
  97         }
  98     }
  99   else
 100     {
 101       fct = start_fct;
 102       no_more = (nip = startp) == (service_user *) -1;
 103     }
 104
 105   while (! no_more)
 106     {
 107       status = (*fct) (name, key, passwd, &errno);
 108
 109       no_more = __nss_next (&nip, "getsecretkey", (void **) &fct, status, 0);
 110     }
 111
 112   return status == NSS_STATUS_SUCCESS;
 113 }