simplesamlphp /
xml-common
| 1 | <?php |
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| 2 | |||
| 3 | declare(strict_types=1); |
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| 4 | |||
| 5 | namespace SimpleSAML\XML\Utils; |
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| 6 | |||
| 7 | use function bin2hex; |
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| 8 | use function random_bytes; |
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| 9 | |||
| 10 | /** |
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| 11 | * @package simplesamlphp/xml-common |
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| 12 | */ |
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| 13 | class Random |
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| 14 | { |
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| 15 | /** |
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| 16 | * The fixed length of random identifiers. |
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| 17 | * |
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| 18 | * (43 - 1) / 2 = 21 → random_bytes(21) → 168 bits |
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| 19 | */ |
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| 20 | public const int ID_LENGTH = 43; |
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| 21 | |||
| 22 | |||
| 23 | /** |
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| 24 | * This function will generate a unique ID that is valid for use |
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| 25 | * in an xs:ID attribute |
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| 26 | */ |
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| 27 | public function generateID(): string |
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| 28 | { |
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| 29 | return '_' . bin2hex(random_bytes((self::ID_LENGTH - 1) / 2)); |
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| 30 | } |
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| 31 | } |
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| 32 |