io.shiftleft.semanticcpg.utils.SecureXmlParsing.scala Maven / Gradle / Ivy

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package io.joern.semanticcpg.utils

import javax.xml.parsers.SAXParserFactory
import scala.util.Try
import scala.xml.{Elem, XML}

object SecureXmlParsing {
  def parseXml(content: String): Option[Elem] = {
    Try {
      val spf = SAXParserFactory.newInstance()

      spf.setValidating(false)
      spf.setNamespaceAware(false)
      spf.setXIncludeAware(false)
      spf.setFeature("http://xml.org/sax/features/validation", false)
      spf.setFeature("http://apache.org/xml/features/disallow-doctype-decl", false)
      spf.setFeature("http://apache.org/xml/features/nonvalidating/load-dtd-grammar", false)
      spf.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false)
      spf.setFeature("http://xml.org/sax/features/external-parameter-entities", false)
      spf.setFeature("http://xml.org/sax/features/external-general-entities", false)

      XML.withSAXParser(spf.newSAXParser()).loadString(content)
    }.toOption
  }
}