src/charon-tkm/src/tkm/tkm_nonceg.c

   1 /*
   2  * Copyrigth (C) 2012 Reto Buerki
   3  * Copyright (C) 2012 Adrian-Ken Rueegsegger
   4  * Hochschule fuer Technik Rapperswil
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2 of the License, or (at your
   9  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  13  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * for more details.
  15  */
  16
  17 #include <tkm/client.h>
  18 #include <tkm/constants.h>
  19
  20 #include "tkm.h"
  21 #include "tkm_nonceg.h"
  22
  23 typedef struct private_tkm_nonceg_t private_tkm_nonceg_t;
  24
  25 /**
  26  * Private data of a tkm_nonceg_t object.
  27  */
  28 struct private_tkm_nonceg_t {
  29
  30         /**
  31          * Public tkm_nonceg_t interface.
  32          */
  33         tkm_nonceg_t public;
  34
  35         /**
  36          * Context id.
  37          */
  38         nc_id_type context_id;
  39
  40 };
  41
  42 METHOD(nonce_gen_t, get_nonce, bool,
  43         private_tkm_nonceg_t *this, size_t size, u_int8_t *buffer)
  44 {
  45         nonce_type nonce;
  46         if (ike_nc_create(this->context_id, size, &nonce) != TKM_OK)
  47         {
  48                 return FALSE;
  49         }
  50
  51         memcpy(buffer, &nonce.data, size);
  52         return TRUE;
  53 }
  54
  55 METHOD(nonce_gen_t, allocate_nonce, bool,
  56         private_tkm_nonceg_t *this, size_t size, chunk_t *chunk)
  57 {
  58         *chunk = chunk_alloc(size);
  59         return get_nonce(this, chunk->len, chunk->ptr);
  60 }
  61
  62 METHOD(nonce_gen_t, destroy, void,
  63         private_tkm_nonceg_t *this)
  64 {
  65         free(this);
  66 }
  67
  68 METHOD(tkm_nonceg_t, get_id, nc_id_type,
  69         private_tkm_nonceg_t *this)
  70 {
  71         return this->context_id;
  72 }
  73
  74 /*
  75  * Described in header.
  76  */
  77 tkm_nonceg_t *tkm_nonceg_create()
  78 {
  79         private_tkm_nonceg_t *this;
  80
  81         INIT(this,
  82                 .public = {
  83                         .nonce_gen = {
  84                                 .get_nonce = _get_nonce,
  85                                 .allocate_nonce = _allocate_nonce,
  86                                 .destroy = _destroy,
  87                         },
  88                         .get_id = _get_id,
  89                 },
  90                 .context_id = tkm->idmgr->acquire_id(tkm->idmgr, TKM_CTX_NONCE),
  91         );
  92
  93         if (!this->context_id)
  94         {
  95                 free(this);
  96                 return NULL;
  97         }
  98
  99         return &this->public;
 100 }