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, 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   union
  46   {
  47     public_function f;
  48     void *ptr;
  49   } fct;
  50   enum nss_status status = NSS_STATUS_UNAVAIL;
  51   int no_more;
  52
  53   if (startp == NULL)
  54     {
  55       no_more = __nss_publickey_lookup (&nip, "getpublickey", &fct.ptr);
  56       if (no_more)
  57         startp = (service_user *) -1;
  58       else
  59         {
  60           startp = nip;
  61           start_fct = fct.f;
  62         }
  63     }
  64   else
  65     {
  66       fct.f = start_fct;
  67       no_more = (nip = startp) == (service_user *) -1;
  68     }
  69
  70   while (! no_more)
  71     {
  72       status = (*fct.f) (name, key, &errno);
  73
  74       no_more = __nss_next2 (&nip, "getpublickey", NULL, &fct.ptr, status, 0);
  75     }
  76
  77   return status == NSS_STATUS_SUCCESS;
  78 }
  79 libc_hidden_def (getpublickey)
  80
  81
  82 int
  83 getsecretkey (const char *name, char *key, const char *passwd)
  84 {
  85   static service_user *startp;
  86   static secret_function start_fct;
  87   service_user *nip;
  88   union
  89   {
  90     secret_function f;
  91     void *ptr;
  92   } fct;
  93   enum nss_status status = NSS_STATUS_UNAVAIL;
  94   int no_more;
  95
  96   if (startp == NULL)
  97     {
  98       no_more = __nss_publickey_lookup (&nip, "getsecretkey", &fct.ptr);
  99       if (no_more)
 100         startp = (service_user *) -1;
 101       else
 102         {
 103           startp = nip;
 104           start_fct = fct.f;
 105         }
 106     }
 107   else
 108     {
 109       fct.f = start_fct;
 110       no_more = (nip = startp) == (service_user *) -1;
 111     }
 112
 113   while (! no_more)
 114     {
 115       status = (*fct.f) (name, key, passwd, &errno);
 116
 117       no_more = __nss_next2 (&nip, "getsecretkey", NULL, &fct.ptr, status, 0);
 118     }
 119
 120   return status == NSS_STATUS_SUCCESS;
 121 }