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/* Copyright 2015 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "Platform.h"
#include "TPM_Types.h"
#include "trng.h"
UINT16 _cpri__GenerateRandom(INT32 randomSize,
BYTE *buffer)
{
int random_togo = 0;
int buffer_index = 0;
uint32_t random_value;
/*
* Retrieve random numbers in 4 byte quantities and pack as many bytes
* as needed into 'buffer'. If randomSize is not divisible by 4, the
* remaining random bytes get dropped.
*/
while (buffer_index < randomSize) {
if (!random_togo) {
random_value = rand();
random_togo = sizeof(random_value);
}
buffer[buffer_index++] = random_value >>
((random_togo-- - 1) * 8);
}
return randomSize;
}
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