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/*
* This file is part of the SSH Library
*
* Copyright (c) 2009 by Aris Adamantiadis
*
* 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 <openssl/rand.h>
/**
* @addtogroup libssh_misc
*
* @{
*/
/**
* @brief Get random bytes
*
* Make sure to always check the return code of this function!
*
* @param[in] where The buffer to fill with random bytes
*
* @param[in] len The size of the buffer to fill.
*
* @param[in] strong Use a strong or private RNG source.
*
* @return 1 on success, 0 on error.
*/
int
ssh_get_random(void *where, int len, int strong)
{
#ifdef HAVE_OPENSSL_RAND_PRIV_BYTES
if (strong) {
/* Returns -1 when not supported, 0 on error, 1 on success */
return !!RAND_priv_bytes(where, len);
}
#else
(void)strong;
#endif /* HAVE_RAND_PRIV_BYTES */
/* Returns -1 when not supported, 0 on error, 1 on success */
return !!RAND_bytes(where, len);
}
/**
* @}
*/