text: /*
   * This file is part of the SSH Library
   *
   * Copyright (c) 2018 by Anderson Toshiyuki Sasaki
   *
   * The SSH Library is free software; you can redistribute it and/or modify
   * it under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or (at your
   * option) any later version.
   *
   * The SSH Library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public License
   * along with the SSH Library; see the file COPYING.  If not, write to
   * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
   * MA 02111-1307, USA.
   */
  
  #include "config.h"
  #include "libssh/crypto.h"
  #include "libssh/threads.h"
  #include <libssh/callbacks.h>
  
  #if (GCRYPT_VERSION_NUMBER >= 0x010600)
  /* libgcrypt >= 1.6 does not support custom callbacks */
  GCRY_THREAD_OPTION_PTHREAD_IMPL;
  
  int crypto_thread_init(struct ssh_threads_callbacks_struct *user_callbacks)
  {
      (void) user_callbacks;
  
      return SSH_OK;
  }
  
  #else
  /* Libgcrypt < 1.6 specific way of handling thread callbacks */
  
  static struct gcry_thread_cbs gcrypt_threads_callbacks;
  
  int crypto_thread_init(struct ssh_threads_callbacks_struct *user_callbacks)
  {
      int cmp;
  
      if (user_callbacks == NULL) {
          return SSH_OK;
      }
  
      cmp = strcmp(user_callbacks->type, "threads_noop");
      if (cmp == 0) {
          gcrypt_threads_callbacks.option= GCRY_THREAD_OPTION_VERSION << 8 ||
          GCRY_THREAD_OPTION_DEFAULT;
      } else {
          gcrypt_threads_callbacks.option= GCRY_THREAD_OPTION_VERSION << 8 ||
          GCRY_THREAD_OPTION_USER;
      }
  
      gcrypt_threads_callbacks.mutex_init = user_callbacks->mutex_init;
      gcrypt_threads_callbacks.mutex_destroy = user_callbacks->mutex_destroy;
      gcrypt_threads_callbacks.mutex_lock = user_callbacks->mutex_lock;
      gcrypt_threads_callbacks.mutex_unlock = user_callbacks->mutex_unlock;
      gcry_control(GCRYCTL_SET_THREAD_CBS, &gcrypt_threads_callbacks);
  
      return SSH_OK;
  }
  
  #endif /* GCRYPT_VERSION_NUMBER */
  
  void crypto_thread_finalize(void)
  {
      return;
  }
  