Captcha validation always wrong

[jonathanwede]

I wanted to implement sr_freecap with femanager, but the captcha validation always fails.
Maybe this error doesn't just occur in my project, so here is a solution I found.

TYPO3 setup:

• TYPO3 v12.4
• femanager v8
• sr-freecap v12.4

In femanager/Classes/Domain/ValidatorCaptchaValidator.php is a function called validCaptcha. That function tries to access the captcha value given by the user.
It wants to read from $this->pluginVariables['captcha'], but that value doesn't exist. The value is located at $this->pluginVariables['tx_femanager_registration']['captcha'].

Here is the updated function that works for me:

protected function validCaptcha(): bool
    {
        $isValid = false;
        $wordRepository = GeneralUtility::makeInstance(WordRepository::class);
        $wordObject = $wordRepository->getWord();
        $wordHash = $wordObject->getWordHash();
        if (!empty($wordHash) && !empty($this->pluginVariables['tx_femanager_registration']['captcha'])) {
            if ($wordObject->getHashFunction() == 'md5') {
                if (
                    md5(
                        strtolower(
                            mb_convert_encoding(
                                (string) $this->pluginVariables['tx_femanager_registration']['captcha'],
                                'ISO-8859-1'
                            )
                        )
                    ) == $wordHash
                ) {
                    $wordRepository->cleanUpWord();
                    $isValid = true;
                }
            }
        }
        return $isValid;
    }