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<?php |
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/** |
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* Trait implementation of repetitive/recursive hashing for digestion algorithms. |
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*/ |
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namespace CryptoManana\Core\Traits\MessageDigestion; |
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use CryptoManana\Core\Abstractions\MessageDigestion\AbstractHashAlgorithm as AnyDerivedHashAlgorithm; |
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use CryptoManana\Core\Interfaces\MessageDigestion\RepetitiveHashingInterface as RepetitiveHashingSpecification; |
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/** |
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* Trait RepetitiveHashingTrait - Reusable implementation of `RepetitiveHashingInterface`. |
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* |
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* @see \CryptoManana\Core\Interfaces\MessageDigestion\RepetitiveHashingInterface The abstract specification. |
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* |
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* @package CryptoManana\Core\Traits\MessageDigestion |
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* |
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* @mixin RepetitiveHashingSpecification |
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* @mixin AnyDerivedHashAlgorithm |
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*/ |
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trait RepetitiveHashingTrait |
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{ |
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/** |
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* Calculates a hash value for the given data. |
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* |
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* @param string $data The input string. |
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* |
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* @return string The digest. |
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* @throws \Exception Validation errors. |
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*/ |
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abstract public function hashData($data); |
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/** |
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* Calculates a hash value for the given data via repetitive/recursive digestion. |
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* |
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* @param string $data The input string. |
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* @param int $iterations The number of internal iterations to perform. |
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* |
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* @return string The digest. |
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* @throws \Exception Validation errors. |
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*/ |
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public function repetitiveHashData($data, $iterations = 2) |
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{ |
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$iterations = filter_var( |
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$iterations, |
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FILTER_VALIDATE_INT, |
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[ |
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"options" => [ |
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"min_range" => 2, |
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"max_range" => PHP_INT_MAX, |
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], |
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] |
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); |
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if ($iterations === false) { |
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throw new \InvalidArgumentException('The repeated hashing times must be a valid integer bigger than 1.'); |
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} |
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$oldDigestFormat = $this->digestFormat; |
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$this->digestFormat = self::DIGEST_OUTPUT_RAW; |
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for ($i = 1; $i < $iterations; $i++) { |
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$data = $this->hashData($data); |
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} |
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$this->digestFormat = $oldDigestFormat; |
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return $this->hashData($data); |
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} |
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} |
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TonyKaravasilev /
CryptoManana
