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42 lines
967 B
C++
42 lines
967 B
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/rand_util.h"
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#include <nacl/nacl_random.h>
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#include "base/basictypes.h"
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#include "base/logging.h"
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namespace {
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void GetRandomBytes(void* output, size_t num_bytes) {
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char* output_ptr = static_cast<char*>(output);
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while (num_bytes > 0) {
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size_t nread;
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const int error = nacl_secure_random(output_ptr, num_bytes, &nread);
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CHECK_EQ(error, 0);
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CHECK_LE(nread, num_bytes);
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output_ptr += nread;
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num_bytes -= nread;
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}
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}
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} // namespace
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namespace base {
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// NOTE: This function must be cryptographically secure. http://crbug.com/140076
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uint64 RandUint64() {
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uint64 result;
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GetRandomBytes(&result, sizeof(result));
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return result;
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}
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void RandBytes(void* output, size_t output_length) {
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GetRandomBytes(output, output_length);
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}
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} // namespace base
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