sunrpc/publickey.c

   1 /* Get public or secret key from key server.
   2    Copyright (C) 1996-2017 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 #include <shlib-compat.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 int
  35 getpublickey (const char *name, char *key)
  36 {
  37   static service_user *startp;
  38   static public_function start_fct;
  39   service_user *nip;
  40   union
  41   {
  42     public_function f;
  43     void *ptr;
  44   } fct;
  45   enum nss_status status = NSS_STATUS_UNAVAIL;
  46   int no_more;
  47
  48   if (startp == NULL)
  49     {
  50       no_more = __nss_publickey_lookup2 (&nip, "getpublickey", NULL, &fct.ptr);
  51       if (no_more)
  52         startp = (service_user *) -1;
  53       else
  54         {
  55           startp = nip;
  56           start_fct = fct.f;
  57         }
  58     }
  59   else
  60     {
  61       fct.f = start_fct;
  62       no_more = (nip = startp) == (service_user *) -1;
  63     }
  64
  65   while (! no_more)
  66     {
  67       status = (*fct.f) (name, key, &errno);
  68
  69       no_more = __nss_next2 (&nip, "getpublickey", NULL, &fct.ptr, status, 0);
  70     }
  71
  72   return status == NSS_STATUS_SUCCESS;
  73 }
  74 libc_hidden_nolink_sunrpc (getpublickey, GLIBC_2_0)
  75
  76
  77 int
  78 getsecretkey (const char *name, char *key, const char *passwd)
  79 {
  80   static service_user *startp;
  81   static secret_function start_fct;
  82   service_user *nip;
  83   union
  84   {
  85     secret_function f;
  86     void *ptr;
  87   } fct;
  88   enum nss_status status = NSS_STATUS_UNAVAIL;
  89   int no_more;
  90
  91   if (startp == NULL)
  92     {
  93       no_more = __nss_publickey_lookup2 (&nip, "getsecretkey", NULL, &fct.ptr);
  94       if (no_more)
  95         startp = (service_user *) -1;
  96       else
  97         {
  98           startp = nip;
  99           start_fct = fct.f;
 100         }
 101     }
 102   else
 103     {
 104       fct.f = start_fct;
 105       no_more = (nip = startp) == (service_user *) -1;
 106     }
 107
 108   while (! no_more)
 109     {
 110       status = (*fct.f) (name, key, passwd, &errno);
 111
 112       no_more = __nss_next2 (&nip, "getsecretkey", NULL, &fct.ptr, status, 0);
 113     }
 114
 115   return status == NSS_STATUS_SUCCESS;
 116 }
 117 libc_hidden_nolink_sunrpc (getsecretkey, GLIBC_2_0)