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Adding hexadecimal check for photos

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see https://github.com/friendica/friendica/issues/6917#issuecomment-492798238
This commit is contained in:
Philipp Holzer 2019-05-29 20:28:25 +02:00
parent 59bbb1ac99
commit 3de540d1d1
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2 changed files with 16 additions and 0 deletions
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4
mod/photos.php
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@ -1027,6 +1027,10 @@ function photos_content(App $a)
// Display a single photo album
if ($datatype === 'album') {
// if $datum is not a valid hex, redirect to the default page
if (!Strings::isHex($datum)) {
$a->internalRedirect();
}
$album = hex2bin($datum);
$total = 0;

12
src/Util/Strings.php
View file

@ -31,6 +31,18 @@ class Strings
return $return;
}
/**
* Checks, if the given string is a valid hexadecimal code
*
* @param string $hexCode
*
* @return bool
*/
public static function isHex($hexCode)
{
return @preg_match("/^[a-f0-9]{2,}$/i", $hexCode) && !(strlen($hexCode) & 1);
}
/**
* @brief This is our primary input filter.
*