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Fixing JFilterInput adding byte offsets to character offset #15966

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Merged
merged 4 commits into from
May 12, 2017
Merged

Fixing JFilterInput adding byte offsets to character offset #15966

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4aa110e
Fixing JFilterInput adding byte offsets to character offset, plus fix…
ggppdk May 11, 2017
dd82ff2
Fixed getting from wrong sub-string the close quote characters
ggppdk May 11, 2017
2c98533
Fixed wrong variable name
ggppdk May 11, 2017
7679cc2
Restore previours behaviour, fixing misleading variable name and wron…
ggppdk May 11, 2017
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20 changes: 14 additions & 6 deletions libraries/joomla/filter/input.php
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Original file line number Diff line number Diff line change
Expand Up @@ -926,8 +926,10 @@ protected function cleanTags($source)
// Find position of equal and open quotes ignoring
if (preg_match('#\s*=\s*\"#', $fromSpace, $matches, PREG_OFFSET_CAPTURE))
{
// We have found an attribute, convert its byte position to a UTF-8 string length, using non-multibyte substr()
$stringBeforeAttr = substr($fromSpace, 0, $matches[0][1]);
$startAttPosition = StringHelper::strlen($stringBeforeAttr);
$startAtt = $matches[0][0];
$startAttPosition = $matches[0][1];
$closeQuotes = StringHelper::strpos(
StringHelper::substr($fromSpace, ($startAttPosition + StringHelper::strlen($startAtt))), '"'
) + $startAttPosition + StringHelper::strlen($startAtt);
Expand Down Expand Up @@ -1080,9 +1082,12 @@ protected function escapeAttributeValues($source)
*/
while (preg_match('#<[^>]*?=\s*?(\"|\')#s', $remainder, $matches, PREG_OFFSET_CAPTURE))
{
// Get the portion before the attribute value
$quotePosition = $matches[0][1];
$nextBefore = $quotePosition + StringHelper::strlen($matches[0][0]);
// We have found a tag with an attribute, convert its byte position to a UTF-8 string length, using non-multibyte substr()
$stringBeforeTag = substr($remainder, 0, $matches[0][1]);
$tagPosition = StringHelper::strlen($stringBeforeTag);

// Get the character length before the attribute value
$nextBefore = $tagPosition + StringHelper::strlen($matches[0][0]);

/*
* Figure out if we have a single or double quote and look for the matching closing quote
Expand All @@ -1092,9 +1097,12 @@ protected function escapeAttributeValues($source)
$pregMatch = ($quote == '"') ? '#(\"\s*/\s*>|\"\s*>|\"\s+|\"$)#' : "#(\'\s*/\s*>|\'\s*>|\'\s+|\'$)#";

// Get the portion after attribute value
if (preg_match($pregMatch, StringHelper::substr($remainder, $nextBefore), $matches, PREG_OFFSET_CAPTURE))
$attributeValueRemainder = StringHelper::substr($remainder, $nextBefore);
if (preg_match($pregMatch, $attributeValueRemainder, $matches, PREG_OFFSET_CAPTURE))
{
// We have a closing quote
// We have a closing quote, convert its byte position to a UTF-8 string length, using non-multibyte substr()
$stringBeforeQuote = substr($attributeValueRemainder, 0, $matches[0][1]);
$closeQuoteChars = StringHelper::strlen($stringBeforeQuote);
$nextAfter = $nextBefore + $matches[0][1];
}
else
Expand Down