Bug #23287 » 0015263_v2.patch
| t3lib/class.t3lib_div.php (Arbeitskopie) | ||
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}
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/**
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* Checks if a given URL matches the host that currently handles this HTTP request.
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* Scheme, hostname and (optional) port of the given URL are compared.
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*
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* @param string $url: URL to compare with the TYPO3 request host
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* @return boolean Whether the URL matches the TYPO3 request host
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*/
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function isOnCurrentHost($url) {
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return (strpos(strtolower($url) . '/', strtolower(t3lib_div::getIndpEnv('TYPO3_REQUEST_HOST')) . '/') === 0);
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}
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/**
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* Check for item in list
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* Check if an item exists in a comma-separated list of items.
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* Usage: 163
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| ... | ... | |
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}
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/**
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* Checks if a given string is a valid frame URL to be loaded in the
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* backend.
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*
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* @param string $url potential URL to check
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*
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* @return string either $url if $url is considered to be harmless, or an
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* empty string otherwise
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*/
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function sanitizeLocalUrl($url = '') {
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$sanitizedUrl = '';
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$decodedUrl = rawurldecode($url);
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$decodedParts = @parse_url($decodedUrl);
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$whitelistPattern = '/^(\p{Nd}|\p{L}|[_\/\.&=\?\+-~])+$/u';
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// Only http and https are allowed as scheme, and at least a path must be given:
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if (isset($decodedParts['scheme']) && !t3lib_div::inList('http,https', $decodedParts['scheme']) || !isset($decodedParts['path'])) {
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$url = '';
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// Check all URL parts for invalid characters:
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} else {
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foreach ($decodedParts as $part) {
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if (!preg_match($whitelistPattern, $part)) {
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$url = '';
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break;
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}
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}
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}
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if (!empty($url)) {
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$testAbsoluteUrl = t3lib_div::resolveBackPath($decodedUrl);
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$testRelativeUrl = t3lib_div::resolveBackPath(
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t3lib_div::dirname(t3lib_div::getIndpEnv('SCRIPT_NAME')) . '/' . $decodedUrl
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);
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// Pass if URL is on the current host:
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if (isset($decodedParts['scheme']) && isset($decodedParts['host'])) {
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if (t3lib_div::isOnCurrentHost($decodedUrl) && strpos($decodedUrl, t3lib_div::getIndpEnv('TYPO3_SITE_URL')) === 0) {
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$sanitizedUrl = $url;
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}
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// Pass if URL is an absolute file path:
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} elseif (t3lib_div::isAbsPath($decodedUrl) && t3lib_div::isAllowedAbsPath($decodedUrl)) {
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$sanitizedUrl = $url;
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// Pass if URL is absolute and below TYPO3 base directory:
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} elseif (strpos($testAbsoluteUrl, t3lib_div::getIndpEnv('TYPO3_SITE_PATH')) === 0 && substr($decodedUrl, 0, 1) === '/') {
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$sanitizedUrl = $url;
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// Pass if URL is relative and below TYPO3 base directory:
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} elseif (strpos($testRelativeUrl, t3lib_div::getIndpEnv('TYPO3_SITE_PATH')) === 0 && substr($decodedUrl, 0, 1) !== '/') {
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$sanitizedUrl = $url;
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}
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}
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if (!empty($url) && empty($sanitizedUrl)) {
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t3lib_div::sysLog('The URL "' . $url . '" is not considered to be local and was denied.', 'Core', 1);
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}
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return $sanitizedUrl;
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}
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/**
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* Moves $source file to $destination if uploaded, otherwise try to make a copy
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* Usage: 4
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*
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