Evaluator.php

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<?php
namespace TYPO3\CMS\Saltedpasswords\Evaluation;

class Evaluator {

    protected $mode = NULL;

    public function returnFieldJS() {
        return 'return value;';
    }

    public function evaluateFieldValue($value, $is_in, &$set) {
        $isEnabled = $this->mode ? \TYPO3\CMS\Saltedpasswords\Utility\SaltedPasswordsUtility::isUsageEnabled($this->mode) : \TYPO3\CMS\Saltedpasswords\Utility\SaltedPasswordsUtility::isUsageEnabled();
        if ($isEnabled) {
            $isMD5 = preg_match('/[0-9abcdef]{32,32}/', $value);
            $isDeprecatedSaltedHash = \TYPO3\CMS\Core\Utility\GeneralUtility::inList('C$,M$', substr($value, 0, 2));
            $objInstanceSaltedPW = \TYPO3\CMS\Saltedpasswords\Salt\SaltFactory::getSaltingInstance(NULL, $this->mode);
            if ($isMD5) {
                $set = TRUE;
                $value = 'M' . $objInstanceSaltedPW->getHashedPassword($value);
            } else {
                // Determine method used for the (possibly) salted hashed password
                $tempValue = $isDeprecatedSaltedHash ? substr($value, 1) : $value;
                $tempObjInstanceSaltedPW = \TYPO3\CMS\Saltedpasswords\Salt\SaltFactory::getSaltingInstance($tempValue);
                if (!is_object($tempObjInstanceSaltedPW)) {
                    $set = TRUE;
                    $value = $objInstanceSaltedPW->getHashedPassword($value);
                }
            }
        }
        return $value;
    }

}