GNUsocial/gnu-social
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Fixes for custom theme upload:

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* skip more files (.xcf image sources, .html docs)
* skip files before rejecting them for funky filenames!
* allow period in filenames (eg foo-1.4.ttf) but blacklist some unsafe extensions-within-extensions
This commit is contained in:
Brion Vibber 2010-09-02 12:11:45 -07:00
parent 4cbbfdab84
commit 11f7fce3bb
1 changed files with 22 additions and 12 deletions
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34
lib/themeuploader.php
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@ -128,8 +128,16 @@ class ThemeUploader
continue;
}
// Check the directory structure...
// Is this a safe or skippable file?
$path = pathinfo($name);
if ($this->skippable($path['filename'], $path['extension'])) {
// Documentation and such... booooring
continue;
} else {
$this->validateFile($path['filename'], $path['extension']);
}
// Check the directory structure...
$dirs = explode('/', $path['dirname']);
$baseDir = array_shift($dirs);
if ($commonBaseDir === false) {
@ -144,14 +152,6 @@ class ThemeUploader
$this->validateFileOrFolder($dir);
}
// Is this a safe or skippable file?
if ($this->skippable($path['filename'], $path['extension'])) {
// Documentation and such... booooring
continue;
} else {
$this->validateFile($path['filename'], $path['extension']);
}
$fullPath = $dirs;
$fullPath[] = $path['basename'];
$localFile = implode('/', $fullPath);
@ -180,9 +180,12 @@ class ThemeUploader
}
}
/**
* @fixme Probably most unrecognized files should just be skipped...
*/
protected function skippable($filename, $ext)
{
$skip = array('txt', 'rtf', 'doc', 'docx', 'odt');
$skip = array('txt', 'html', 'rtf', 'doc', 'docx', 'odt', 'xcf');
if (strtolower($filename) == 'readme') {
return true;
}
@ -201,17 +204,24 @@ class ThemeUploader
protected function validateFileOrFolder($name)
{
if (!preg_match('/^[a-z0-9_-]+$/i', $name)) {
if (!preg_match('/^[a-z0-9_\.-]+$/i', $name)) {
$msg = _("Theme contains invalid file or folder name. " .
"Stick with ASCII letters, digits, underscore, and minus sign.");
throw new ClientException($msg);
}
if (preg_match('/\.(php|cgi|asp|aspx|js|vb)\w/i', $name)) {
$msg = _("Theme contains unsafe file extension names; may be unsafe.");
throw new ClientException($msg);
}
return true;
}
protected function validateExtension($ext)
{
$allowed = array('css', 'png', 'gif', 'jpg', 'jpeg');
$allowed = array('css', // CSS may need validation
'png', 'gif', 'jpg', 'jpeg',
'svg', // SVG images/fonts may need validation
'ttf', 'eot', 'woff');
if (!in_array(strtolower($ext), $allowed)) {
$msg = sprintf(_("Theme contains file of type '.%s', " .
"which is not allowed."),