sunrpc/publickey.c

   1 /* Get public or secret key from key server.
   2    Copyright (C) 1996-1999,2002,2007 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, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <errno.h>
  21 #include <rpc/netdb.h>
  22 #include <rpc/auth_des.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) internal_function;
  36
  37
  38 int
  39 getpublickey (const char *name, char *key)
  40 {
  41   static service_user *startp;
  42   static public_function start_fct;
  43   service_user *nip;
  44   union
  45   {
  46     public_function f;
  47     void *ptr;
  48   } fct;
  49   enum nss_status status = NSS_STATUS_UNAVAIL;
  50   int no_more;
  51
  52   if (startp == NULL)
  53     {
  54       no_more = __nss_publickey_lookup (&nip, "getpublickey", &fct.ptr);
  55       if (no_more)
  56         startp = (service_user *) -1;
  57       else
  58         {
  59           startp = nip;
  60           start_fct = fct.f;
  61         }
  62     }
  63   else
  64     {
  65       fct.f = start_fct;
  66       no_more = (nip = startp) == (service_user *) -1;
  67     }
  68
  69   while (! no_more)
  70     {
  71       status = (*fct.f) (name, key, &errno);
  72
  73       no_more = __nss_next2 (&nip, "getpublickey", NULL, &fct.ptr, status, 0);
  74     }
  75
  76   return status == NSS_STATUS_SUCCESS;
  77 }
  78 libc_hidden_nolink (getpublickey, GLIBC_2_0)
  79
  80
  81 int
  82 getsecretkey (const char *name, char *key, const char *passwd)
  83 {
  84   static service_user *startp;
  85   static secret_function start_fct;
  86   service_user *nip;
  87   union
  88   {
  89     secret_function f;
  90     void *ptr;
  91   } fct;
  92   enum nss_status status = NSS_STATUS_UNAVAIL;
  93   int no_more;
  94
  95   if (startp == NULL)
  96     {
  97       no_more = __nss_publickey_lookup (&nip, "getsecretkey", &fct.ptr);
  98       if (no_more)
  99         startp = (service_user *) -1;
 100       else
 101         {
 102           startp = nip;
 103           start_fct = fct.f;
 104         }
 105     }
 106   else
 107     {
 108       fct.f = start_fct;
 109       no_more = (nip = startp) == (service_user *) -1;
 110     }
 111
 112   while (! no_more)
 113     {
 114       status = (*fct.f) (name, key, passwd, &errno);
 115
 116       no_more = __nss_next2 (&nip, "getsecretkey", NULL, &fct.ptr, status, 0);
 117     }
 118
 119   return status == NSS_STATUS_SUCCESS;
 120 }
 121 libc_hidden_nolink (getsecretkey, GLIBC_2_0)