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/*
* This file is part of the SSH Library
*
* Copyright (c) 2017 Sartura d.o.o.
*
* Author: Juraj Vijtiuk <juraj.vijtiuk@sartura.hr>
*
* 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 "mbedcrypto-compat.h"
mbedtls_ctr_drbg_context ssh_mbedtls_ctr_drbg;
int
ssh_mbedtls_random(void *where, int len, int strong)
{
int rc = 0;
if (strong) {
mbedtls_ctr_drbg_set_prediction_resistance(&ssh_mbedtls_ctr_drbg,
MBEDTLS_CTR_DRBG_PR_ON);
rc = mbedtls_ctr_drbg_random(&ssh_mbedtls_ctr_drbg, where, len);
mbedtls_ctr_drbg_set_prediction_resistance(&ssh_mbedtls_ctr_drbg,
MBEDTLS_CTR_DRBG_PR_OFF);
} else {
rc = mbedtls_ctr_drbg_random(&ssh_mbedtls_ctr_drbg, where, len);
}
return !rc;
}
int
ssh_get_random(void *where, int len, int strong)
{
return ssh_mbedtls_random(where, len, strong);
}