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// Copyright (c) 2012 The Chromium 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 "base/rand_util.h"
#include <nacl/nacl_random.h>
#include <stddef.h>
#include <stdint.h>
#include "base/logging.h"
namespace {
void GetRandomBytes(void* output, size_t num_bytes) {
char* output_ptr = static_cast<char*>(output);
while (num_bytes > 0) {
size_t nread;
const int error = nacl_secure_random(output_ptr, num_bytes, &nread);
CHECK_EQ(error, 0);
CHECK_LE(nread, num_bytes);
output_ptr += nread;
num_bytes -= nread;
}
}
} // namespace
namespace base {
// NOTE: This function must be cryptographically secure. http://crbug.com/140076
uint64_t RandUint64() {
uint64_t result;
GetRandomBytes(&result, sizeof(result));
return result;
}
void RandBytes(void* output, size_t output_length) {
GetRandomBytes(output, output_length);
}
} // namespace base
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