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/* Copyright (c) 2014, 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_WINDOWS)
#include <limits.h>
#include <stdlib.h>
#pragma warning(push, 3)
#include <windows.h>
/* #define needed to link in RtlGenRandom(), a.k.a. SystemFunction036. See the
* "Community Additions" comment on MSDN here:
* http://msdn.microsoft.com/en-us/library/windows/desktop/aa387694.aspx */
#define SystemFunction036 NTAPI SystemFunction036
#include <ntsecapi.h>
#undef SystemFunction036
#pragma warning(pop)
#include "internal.h"
void RAND_cleanup(void) {
}
void CRYPTO_sysrand(uint8_t *out, size_t requested) {
while (requested > 0) {
ULONG output_bytes_this_pass = ULONG_MAX;
if (requested < output_bytes_this_pass) {
output_bytes_this_pass = requested;
}
if (RtlGenRandom(out, output_bytes_this_pass) == FALSE) {
abort();
}
requested -= output_bytes_this_pass;
out += output_bytes_this_pass;
}
return;
}
#endif /* OPENSSL_WINDOWS */
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