/* 
   Copyright (c) 2014 Anton Titov.
 
   Copyright (c) 2014 pCloud Ltd.  All rights reserved.
 
   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met: Redistributions of source code must retain the above
   copyright notice, this list of conditions and the following
   disclaimer.  Redistributions in binary form must reproduce the
   above copyright notice, this list of conditions and the following
   disclaimer in the documentation and/or other materials provided
   with the distribution.  Neither the name of pCloud Ltd nor the
   names of its contributors may be used to endorse or promote
   products derived from this software without specific prior written
   permission.
 
   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL pCloud
   Ltd BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
   OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
   USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
   DAMAGE.
*/

#include "pssl.h"
#include "psynclib.h"
#include "pmemlock.h"
#include <string.h>
#include <stddef.h>

static pthread_mutex_t rsa_decr_mutex = PTHREAD_MUTEX_INITIALIZER;

static void psync_ssl_free_psync_encrypted_data_t(psync_encrypted_data_t e){
  psync_ssl_memclean(e->data, e->datalen);
  psync_locked_free(e);
}

void psync_ssl_rsa_free_binary(psync_binary_rsa_key_t bin){
  psync_ssl_free_psync_encrypted_data_t(bin);
}

void psync_ssl_free_symmetric_key(psync_symmetric_key_t key){
  psync_ssl_memclean(key->key, key->keylen);
  psync_locked_free(key);
}

psync_encrypted_symmetric_key_t psync_ssl_alloc_encrypted_symmetric_key(size_t len){
  psync_encrypted_symmetric_key_t ret;
  ret=psync_malloc(offsetof(psync_encrypted_data_struct_t, data)+len);
  ret->datalen=len;
  return ret;
}

psync_encrypted_symmetric_key_t psync_ssl_copy_encrypted_symmetric_key(psync_encrypted_symmetric_key_t src){
  psync_encrypted_symmetric_key_t ret;
  ret=psync_malloc(offsetof(psync_encrypted_data_struct_t, data)+src->datalen);
  ret->datalen=src->datalen;
  memcpy(ret->data, src->data, src->datalen);
  return ret;
}
/**************************************************************************************************************************************************************************************/
psync_symmetric_key_t psync_ssl_rsa_decrypt_symm_key_lock(psync_rsa_privatekey_t* rsa, const psync_encrypted_symmetric_key_t* enckey) {
  psync_symmetric_key_t sym_key;

  debug(D_NOTICE, "Get RSA decrypt key lock.");
  pthread_mutex_lock(&rsa_decr_mutex);

  sym_key = psync_ssl_rsa_decrypt_symmetric_key(*rsa, *enckey);

  pthread_mutex_unlock(&rsa_decr_mutex);
  debug(D_NOTICE, "RSA decrypt key Lock released.");

  return sym_key;
}
/**************************************************************************************************************************************************************************************/