lib/pin.c

   1 /*
   2  * GnuTLS PIN support for PKCS#11 or TPM
   3  * Copyright (C) 2010-2012 Free Software Foundation, Inc.
   4  *
   5  * Authors: Nikos Mavrogiannopoulos
   6  *
   7  * The GnuTLS is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public License
   9  * as published by the Free Software Foundation; either version 3 of
  10  * the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  19  */
  20
  21 #include <gnutls_int.h>
  22 #include <gnutls/pkcs11.h>
  23 #include <pin.h>
  24
  25 gnutls_pin_callback_t _gnutls_pin_func;
  26 void *_gnutls_pin_data;
  27
  28 /**
  29  * gnutls_pkcs11_set_pin_function:
  30  * @fn: The PIN callback, a gnutls_pin_callback_t() function.
  31  * @userdata: data to be supplied to callback
  32  *
  33  * This function will set a callback function to be used when a PIN is
  34  * required for PKCS 11 operations.  See
  35  * gnutls_pin_callback_t() on how the callback should behave.
  36  *
  37  * Since: 2.12.0
  38  **/
  39 void
  40 gnutls_pkcs11_set_pin_function (gnutls_pin_callback_t fn,
  41                                 void *userdata)
  42 {
  43   _gnutls_pin_func = fn;
  44   _gnutls_pin_data = userdata;
  45 }
  46
  47 /**
  48  * gnutls_pkcs11_get_pin_function:
  49  * @userdata: data to be supplied to callback
  50  *
  51  * This function will return the callback function set using
  52  * gnutls_pkcs11_set_pin_function().
  53  *
  54  * Returns: The function set or NULL otherwise.
  55  *
  56  * Since: 3.1.0
  57  **/
  58 gnutls_pin_callback_t
  59 gnutls_pkcs11_get_pin_function (void **userdata)
  60 {
  61   if (_gnutls_pin_func != NULL)
  62     {
  63       *userdata = _gnutls_pin_data;
  64       return _gnutls_pin_func;
  65     }
  66   return NULL;
  67 }