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Check whether data is parsable by 'imagecreatefromstring' in jimIcon.

This commit is contained in:
wn_ 2021-02-22 18:03:36 +00:00
parent 42173386b3
commit 7c966b69d5
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]);
}
} }
?> ?>