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<?php
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<?php
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/*
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/*
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* UUID & MAC Utils
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* UUID & MAC Utils
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* Copyright 2017 - 2024 Daniel Marschall, ViaThinkSoft
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* Copyright 2017 - 2024 Daniel Marschall, ViaThinkSoft
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* Version 2024-04-04
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* Version 2024-04-16
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*
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* You may obtain a copy of the License at
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*
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*
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</script>
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</script>
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<h3 id="gen_uuidv35">Generate name-based (version 3 / 5 / <font color="green">New: 8</font>) UUID</h3>
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<h3 id="gen_uuidv35">Generate name-based (version 3 / 5 / <font color="green">New: 8</font>) UUID</h3>
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<p><i>An UUIDv3 is made out of a MD5 hash and an UUIDv5 is made out of a SHA1 hash.
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<p><i>An UUIDv3 is made out of a MD5 hash and an UUIDv5 is made out of a SHA1 hash.
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The revision of RFC4122 also contains an example for a custom UUIDv8 that
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RFC 9562 also contains an example for a custom UUIDv8 implementation that
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uses modern hash algorithms.</i></p>
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uses modern hash algorithms.</i></p>
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<script>
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<script>
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function show_uuidv35_info() {
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function show_uuidv35_info() {
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        document.getElementById("uuidv35_info_button").style.display = "none";
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        document.getElementById("uuidv35_info_button").style.display = "none";
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- 12 bit Hash Mid
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- 12 bit Hash Mid
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-  2 bit Variant (fix 0b10)
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-  2 bit Variant (fix 0b10)
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- 62 bit Hash Low
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- 62 bit Hash Low
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<u>As shown in <a href="https://datatracker.ietf.org/doc/draft-ietf-uuidrev-rfc4122bis/">draft-ietf-uuidrev-rfc4122bis-12</a> Appendix C.2:</u>
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<u>As shown in <a href="https://www.ietf.org/rfc/rfc9562.txt">RFC 9562</a> Appendix B.2:</u>
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UUIDv8(<i>HashAlgo</i>, <i>NameSpaceUuid</i>, <i>Data</i>) := <abbr title="Adds UUID variant 0b10 and version 8">ConvertRawBytesToUuid_v8</abbr>(<i>HashAlgo</i>( Binary[<i>NameSpaceUuid</i>] || <i>Data</i> )).
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UUIDv8(<i>HashAlgo</i>, <i>NameSpaceUuid</i>, <i>Data</i>) := <abbr title="Adds UUID variant 0b10 and version 8">ConvertRawBytesToUuid_v8</abbr>(<i>HashAlgo</i>( Binary[<i>NameSpaceUuid</i>] || <i>Data</i> )).
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</pre></p>
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</pre></p>
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<style>
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<style>
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<form method="GET" action="interprete_uuid.php">
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<form method="GET" action="interprete_uuid.php">
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        <label>Hash algorithm:</label><select name="version" id="nb_version" onchange="javascript:nb_version_choose();">
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        <label>Hash algorithm:</label><select name="version" id="nb_version" onchange="javascript:nb_version_choose();">
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                <?php
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                <?php
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                echo "\t\t<option disabled>--- UUIDv3 (defined in RFC 4122) ---</option>\n";
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                echo "\t\t<option disabled>--- UUIDv3 (defined in RFC 4122/9562) ---</option>\n";
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                echo "\t\t<option value=\"3\">MD5</option>\n";
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                echo "\t\t<option value=\"3\">MD5</option>\n";
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                echo "\t\t<option disabled>--- UUIDv5 (defined in RFC 4122) ---</option>\n";
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                echo "\t\t<option disabled>--- UUIDv5 (defined in RFC 4122/9562) ---</option>\n";
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                echo "\t\t<option value=\"5\" selected>SHA1</option>\n";
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                echo "\t\t<option value=\"5\" selected>SHA1</option>\n";
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                echo "\t\t<option disabled>--- UUIDv8 (shown in Internet Draft 12, Appendix C.2) ---</option>\n";
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                echo "\t\t<option disabled>--- UUIDv8 (shown in RFC 9562, Appendix B.2) ---</option>\n";
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                $tmp = [];
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                $tmp = [];
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                $algos = hash_algos();
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                $algos = hash_algos();
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                $algos[] = 'shake128';
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                $algos[] = 'shake128';
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                $algos[] = 'shake256';
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                $algos[] = 'shake256';
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                foreach ($algos as $algo) {
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                foreach ($algos as $algo) {