tinydtls-sys 0.2.0+tinydtls-9d6cf54

/*******************************************************************************
 *
 * Copyright (c) 2011-2022 Olaf Bergmann (TZI) and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v. 1.0 which accompanies this distribution.
 *
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *    Olaf Bergmann  - initial API and implementation
 *    Jon Shallow    - platform dependent prng support
 *
 *******************************************************************************/

#include "tinydtls.h"
#include "dtls_prng.h"
#include <string.h>

int
dtls_prng(unsigned char *buf, size_t len) {
  u32_t v = LWIP_RAND();
  size_t k_len = len;

  while (len > sizeof(v)) {
    memcpy(buf, &v, sizeof(v));
    len -= sizeof(v);
    buf += sizeof(v);
    v = LWIP_RAND();
  }

  memcpy(buf, &v, len);
  return k_len;
}

void
dtls_prng_init(unsigned seed) {
  (void) seed;
}