1  /* Get public or secret key from key server.
       2     Copyright (C) 1996-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <errno.h>
      20  #include <rpc/netdb.h>
      21  #include <rpc/auth_des.h>
      22  #include <shlib-compat.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  int
      34  getpublickey (const char *name, char *key)
      35  {
      36    nss_action_list nip;
      37    union
      38    {
      39      public_function f;
      40      void *ptr;
      41    } fct;
      42    enum nss_status status = NSS_STATUS_UNAVAIL;
      43    int no_more;
      44  
      45    no_more = __nss_publickey_lookup2 (&nip, "getpublickey", NULL, &fct.ptr);
      46  
      47    while (! no_more)
      48      {
      49        status = (*fct.f) (name, key, &errno);
      50  
      51        no_more = __nss_next2 (&nip, "getpublickey", NULL, &fct.ptr, status, 0);
      52      }
      53  
      54    return status == NSS_STATUS_SUCCESS;
      55  }
      56  libc_hidden_nolink_sunrpc (getpublickey, GLIBC_2_0)
      57  
      58  
      59  int
      60  getsecretkey (const char *name, char *key, const char *passwd)
      61  {
      62    nss_action_list nip;
      63    union
      64    {
      65      secret_function f;
      66      void *ptr;
      67    } fct;
      68    enum nss_status status = NSS_STATUS_UNAVAIL;
      69    int no_more;
      70  
      71    no_more = __nss_publickey_lookup2 (&nip, "getsecretkey", NULL, &fct.ptr);
      72  
      73    while (! no_more)
      74      {
      75        status = (*fct.f) (name, key, passwd, &errno);
      76  
      77        no_more = __nss_next2 (&nip, "getsecretkey", NULL, &fct.ptr, status, 0);
      78      }
      79  
      80    return status == NSS_STATUS_SUCCESS;
      81  }
      82  libc_hidden_nolink_sunrpc (getsecretkey, GLIBC_2_0)