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Streamline validation of patternProperties Regex #653

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merged 3 commits into from
Mar 18, 2021
Merged

Streamline validation of patternProperties Regex #653

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046f6b4
Streamline validation of patternProperties Regex
guilliamxavier Feb 4, 2021
3d4469c
Factorize pattern-to-regex
guilliamxavier Feb 4, 2021
330db08
Use a safer delimiter in jsonPatternToPhpRegex()
guilliamxavier Feb 8, 2021
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12 changes: 12 additions & 0 deletions src/JsonSchema/Constraints/BaseConstraint.php
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Original file line number Diff line number Diff line change
Expand Up @@ -153,4 +153,16 @@ public static function arrayToObjectRecursive($array)

return (object) json_decode($json);
}

/**
* Transform a JSON pattern into a PCRE regex
*
* @param string $pattern
*
* @return string
*/
public static function jsonPatternToPhpRegex($pattern)
{
return '~' . str_replace('~', '\\~', $pattern) . '~u';
}
}
2 changes: 1 addition & 1 deletion src/JsonSchema/Constraints/FormatConstraint.php
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Expand Up @@ -197,7 +197,7 @@ protected function validateDateTime($datetime, $format)

protected function validateRegex($regex)
{
return false !== @preg_match('#' . str_replace('#', '\\#', $regex) . '#u', '');
return false !== @preg_match(self::jsonPatternToPhpRegex($regex), '');
}

protected function validateColor($color)
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13 changes: 3 additions & 10 deletions src/JsonSchema/Constraints/ObjectConstraint.php
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Expand Up @@ -54,24 +54,17 @@ public function check(&$element, $schema = null, JsonPointer $path = null, $prop

public function validatePatternProperties($element, JsonPointer $path = null, $patternProperties)
{
$try = array('/', '#', '+', '~', '%');
$matches = array();
foreach ($patternProperties as $pregex => $schema) {
$delimiter = '/';
// Choose delimiter. Necessary for patterns like ^/ , otherwise you get error
foreach ($try as $delimiter) {
if (strpos($pregex, $delimiter) === false) { // safe to use
break;
}
}
$fullRegex = self::jsonPatternToPhpRegex($pregex);

// Validate the pattern before using it to test for matches
if (@preg_match($delimiter . $pregex . $delimiter . 'u', '') === false) {
if (@preg_match($fullRegex, '') === false) {
$this->addError(ConstraintError::PREGEX_INVALID(), $path, array('pregex' => $pregex));
continue;
}
foreach ($element as $i => $value) {
if (preg_match($delimiter . $pregex . $delimiter . 'u', $i)) {
if (preg_match($fullRegex, $i)) {
$matches[] = $i;
$this->checkUndefined($value, $schema ?: new \stdClass(), $path, $i, in_array($i, $this->appliedDefaults));
}
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2 changes: 1 addition & 1 deletion src/JsonSchema/Constraints/StringConstraint.php
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Expand Up @@ -40,7 +40,7 @@ public function check(&$element, $schema = null, JsonPointer $path = null, $i =
}

// Verify a regex pattern
if (isset($schema->pattern) && !preg_match('#' . str_replace('#', '\\#', $schema->pattern) . '#u', $element)) {
if (isset($schema->pattern) && !preg_match(self::jsonPatternToPhpRegex($schema->pattern), $element)) {
$this->addError(ConstraintError::PATTERN(), $path, array(
'pattern' => $schema->pattern,
));
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