chromium/third_party/blink/renderer/platform/wtf/uuid.h

/*
 * Copyright (C) 2010 Google Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
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 * in the documentation and/or other materials provided with the
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 * this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_UUID_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_UUID_H_

#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/blink/renderer/platform/wtf/wtf_export.h"

namespace WTF {

// Creates a UUID that consists of 32 hexadecimal digits and returns its
// canonical form.  The canonical form is displayed in 5 groups separated by
// hyphens, in the form 8-4-4-4-12 for a total of 36 characters.
// The hexadecimal values "a" through "f" are output as lower case characters.
//
// Note: for security reason, we should always generate version 4 UUID that use
// a scheme relying only on random numbers.  This algorithm sets the version
// number as well as two reserved bits. All other bits are set using a random or
// pseudorandom data source. Version 4 UUIDs have the form
// xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx with hexadecimal digits for x and one of
// 8, 9, A, or B for y.
WTF_EXPORT String CreateCanonicalUUIDString();

// Check that the UUID is a valid UUID. A valid UUID is a string made out of 5
// groups of lower case hexadecimal characters separated by hyphens, in the form
// 8-4-4-4-12.
WTF_EXPORT bool IsValidUUID(const String& uuid);

}  // namespace WTF

#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_UUID_H_