1 /* Copyright (c) 2017, Google Inc.
2 *
3 * Permission to use, copy, modify, and/or distribute this software for any
4 * purpose with or without fee is hereby granted, provided that the above
5 * copyright notice and this permission notice appear in all copies.
6 *
7 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
8 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
10 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
12 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
13 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
14
15 #include <openssl/rand.h>
16
17 #if defined(OPENSSL_FUCHSIA) && !defined(BORINGSSL_UNSAFE_DETERMINISTIC_MODE)
18
19 #include <limits.h>
20 #include <stdlib.h>
21
22 #include <magenta/syscalls.h>
23
24 #include "../fipsmodule/rand/internal.h"
25
CRYPTO_sysrand(uint8_t * out,size_t requested)26 void CRYPTO_sysrand(uint8_t *out, size_t requested) {
27 while (requested > 0) {
28 size_t output_bytes_this_pass = MX_CPRNG_DRAW_MAX_LEN;
29 if (requested < output_bytes_this_pass) {
30 output_bytes_this_pass = requested;
31 }
32 size_t bytes_drawn;
33 mx_status_t status =
34 mx_cprng_draw(out, output_bytes_this_pass, &bytes_drawn);
35 if (status != MX_OK) {
36 abort();
37 }
38 requested -= bytes_drawn;
39 out += bytes_drawn;
40 }
41 }
42
43 #endif /* OPENSSL_FUCHSIA && !BORINGSSL_UNSAFE_DETERMINISTIC_MODE */
44