text: /* Copyright (c) 2017, Google Inc.
   *
   * Permission to use, copy, modify, and/or distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice and this permission notice appear in all copies.
   *
   * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
   * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
   * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
   * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
  
  #include <openssl/rand.h>
  
  #if defined(OPENSSL_FUCHSIA) && !defined(BORINGSSL_UNSAFE_DETERMINISTIC_MODE)
  
  #include <limits.h>
  #include <stdlib.h>
  
  #include <zircon/syscalls.h>
  
  #include "../fipsmodule/rand/internal.h"
  
  void CRYPTO_sysrand(uint8_t *out, size_t requested) {
    while (requested > 0) {
      size_t output_bytes_this_pass = ZX_CPRNG_DRAW_MAX_LEN;
      if (requested < output_bytes_this_pass) {
        output_bytes_this_pass = requested;
      }
      size_t bytes_drawn;
      zx_status_t status =
          zx_cprng_draw(out, output_bytes_this_pass, &bytes_drawn);
      if (status != ZX_OK) {
        abort();
      }
      requested -= bytes_drawn;
      out += bytes_drawn;
    }
  }
  
  #endif  // OPENSSL_FUCHSIA && !BORINGSSL_UNSAFE_DETERMINISTIC_MODE
  