Differential D15491 Diff 37342 src/utils/PhutilHashingIterator.php

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				<?php

				final class PhutilHashingIterator
				extends PhutilProxyIterator
				implements Iterator {

				private $hash;
				private $algorithm;

				public function setAlgorithm($algorithm) {
				$this->algorithm = $algorithm;
				return $this;
				}

				public function getAlgorithm() {
				return $this->algorithm;
				}

				public function getHash() {
				$hash = $this->getHashResource();
				return hash_final($hash, $raw_output = false);
				}

				protected function didReadValue($value) {
				$hash = $this->getHashResource();

				hash_update($hash, $value);

				return $value;
				}

				private function getHashResource() {
				if (!$this->hash) {
				$algorithm = $this->getAlgorithm();
				$this->hash = hash_init($algorithm);
				}
				return $this->hash;
				}

				}