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Merge pull request 'Check whether data is parsable by 'imagecreatefromstring' in jimIcon.' (#7) from wn/tt-rss:jimIcon-imagecreatefromstring into master 

Reviewed-on: https://git.tt-rss.org/fox/tt-rss/pulls/7
This commit is contained in:
fox 2021-02-22 23:10:43 +03:00
parent 42173386b3 7c966b69d5
commit ac6cea859a
1 changed files with 12 additions and 5 deletions
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17
lib/jimIcon.php
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@ -104,11 +104,11 @@ class jimIcon {
} }
// See if we can parse it (might be PNG format here) // See if we can parse it (might be PNG format here)
$i = @imagecreatefromstring($data); if (self::has_parsable_image_type($data)) {
if ($i = @imagecreatefromstring($data)) {
if ($i) { imagesavealpha($i, true);
imagesavealpha($i, true); return $i;
return $i; }
} }
// Must be a BMP. Parse it ourselves. // Must be a BMP. Parse it ourselves.
@ -267,5 +267,12 @@ class jimIcon {
} }
return $img; return $img;
} }
// Checks whether the data is a type parsable by imagecreatefromstring()
private function has_parsable_image_type($image_data) {
$size = getimagesizefromstring($image_data);
return $size && in_array($size[2],
[IMAGETYPE_JPEG, IMAGETYPE_PNG, IMAGETYPE_GIF, IMAGETYPE_BMP, IMAGETYPE_WBMP, IMAGETYPE_WEBP]);
}
} }
?> ?>