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prevent possible endless recursion on decodeMailHeader

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This commit is contained in:
Klaus Leithoff 2016-04-15 08:50:02 +00:00
parent ea4932b1d7
commit 9f6104f53a
1 changed files with 6 additions and 16 deletions
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22
api/src/Mail/Html.php
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@ -25,18 +25,18 @@ class Html
*
* @param string $_string -> part of an mailheader
* @param string $displayCharset the charset parameter specifies the character set to represent the result by (if iconv_mime_decode is to be used)
* @param integer $reclevel param to control recursive calls (to prevent endless recursion)
* @return string
*/
static function decodeMailHeader($_string, $displayCharset='utf-8')
static function decodeMailHeader($_string, $displayCharset='utf-8', $reclevel=0)
{
/*
$maxreclevel=25;
if ($reclevel > $maxreclevel) {
error_log( __METHOD__.__LINE__." Recursion Level Exeeded ($reclevel) while decoding $_string ");
return $_string;
}
$reclevel++;
*/
//error_log(__FILE__.','.__METHOD__.':'."called with $_string and CHARSET $displayCharset");
if(function_exists('imap_mime_header_decode'))
{
@ -73,20 +73,10 @@ class Html
$openTags = substr_count($element->text,'?=');
if(preg_match('/\?=.+=\?/', $element->text) && $openTags>0 && $openTags==substr_count($element->text,'=?') && $element->text != $_string)
{
$element->text = self::decodeMailHeader($element->text, $element->charset);
$element->text = self::decodeMailHeader($element->text, $element->charset, $reclevel);
$element->charset = $displayCharset;
}
$translatedString = Api\Translation::convert($element->text,$element->charset);
/* //try to be smart about concatenating
error_log(__METHOD__.__LINE__.$translatedString);
error_log(__METHOD__.__LINE__.$newString);
if ($translatedString && $newString && strpos($translatedString,$newString)===0)
{
$newString = $translatedString;
}
else
*/
$newString .= $translatedString;
$newString .= Api\Translation::convert($element->text,$element->charset);
}
else
{
@ -94,7 +84,7 @@ error_log(__METHOD__.__LINE__.$newString);
$convertAtEnd = true;
}
}
if ($convertAtEnd) $newString = self::decodeMailHeader($newString,$displayCharset);
if ($convertAtEnd) $newString = self::decodeMailHeader($newString,$displayCharset,$reclevel);
return preg_replace('/([\000-\012\015\016\020-\037\075])/','',$newString);
}
elseif(function_exists(mb_decode_mimeheader))