From bd53025fa776091cd82d0fca57a28a5404fb4f37 Mon Sep 17 00:00:00 2001 From: Thomas Lenz Date: Wed, 30 Mar 2016 08:36:03 +0200 Subject: fix problem with XML parser and additional features options --- .../java/at/gv/egovernment/moa/util/DOMUtils.java | 97 ++++++++++++++++++++-- 1 file changed, 89 insertions(+), 8 deletions(-) (limited to 'id/server/moa-id-commons/src/main/java/at/gv/egovernment') diff --git a/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/util/DOMUtils.java b/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/util/DOMUtils.java index 0a07fc4a7..95cd63643 100644 --- a/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/util/DOMUtils.java +++ b/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/util/DOMUtils.java @@ -33,6 +33,7 @@ import java.util.HashSet; import java.util.Iterator; import java.util.List; import java.util.Map; +import java.util.Map.Entry; import java.util.Set; import java.util.Vector; @@ -115,7 +116,7 @@ public class DOMUtils { private static final String EXTERNAL_PARAMETER_ENTITIES_FEATURE = "http://xml.org/sax/features/external-parameter-entities"; - private static final String DISALLOW_DOCTYPE_FEATURE = + public static final String DISALLOW_DOCTYPE_FEATURE = "http://apache.org/xml/features/disallow-doctype-decl"; @@ -205,7 +206,8 @@ public class DOMUtils { String externalSchemaLocations, String externalNoNamespaceSchemaLocation, EntityResolver entityResolver, - ErrorHandler errorHandler) + ErrorHandler errorHandler, + Map parserFeatures) throws SAXException, IOException, ParserConfigurationException { DOMParser parser; @@ -247,8 +249,25 @@ public class DOMUtils { parser.setFeature(EXTERNAL_GENERAL_ENTITIES_FEATURE, false); parser.setFeature(EXTERNAL_PARAMETER_ENTITIES_FEATURE, false); + //set external added parser features + if (parserFeatures != null) { + for (Entry el : parserFeatures.entrySet()) { + String key = el.getKey(); + if (MiscUtil.isNotEmpty(key)) { + Object value = el.getValue(); + if (value != null && value instanceof Boolean) + parser.setFeature(key, (boolean)value); + + else + Logger.warn("This XML parser only allows features with 'boolean' values"); + + } else + Logger.warn("Can not set 'null' feature to XML parser"); + } + } + //fix XXE problem - parser.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true); + //parser.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true); if (validating) { @@ -346,6 +365,7 @@ public class DOMUtils { * @param externalNoNamespaceSchemaLocation The schema location of the * schema for elements without a namespace, the same way it is accepted by the * xsi:noNamespaceSchemaLocation attribute. + * @param parserFeatures * @return The parsed XML document as a DOM tree. * @throws SAXException An error occurred parsing the document. * @throws IOException An error occurred reading the document. @@ -356,7 +376,7 @@ public class DOMUtils { InputStream inputStream, boolean validating, String externalSchemaLocations, - String externalNoNamespaceSchemaLocation) + String externalNoNamespaceSchemaLocation, Map parserFeatures) throws SAXException, IOException, ParserConfigurationException { @@ -367,9 +387,50 @@ public class DOMUtils { externalSchemaLocations, externalNoNamespaceSchemaLocation, new MOAEntityResolver(), - new MOAErrorHandler()); + new MOAErrorHandler(), + parserFeatures); } + /** + * Parse an XML document from a String. + * + * It uses a MOAEntityResolver as the EntityResolver + * and a MOAErrorHandler as the ErrorHandler. + * + * @param xmlString The String containing the XML document. + * @param encoding The encoding of the XML document. + * @param validating If true, parse validating. + * @param externalSchemaLocations A String containing namespace + * URI to schema location pairs, the same way it is accepted by the xsi: + * schemaLocation attribute. + * @param externalNoNamespaceSchemaLocation The schema location of the + * schema for elements without a namespace, the same way it is accepted by the + * xsi:noNamespaceSchemaLocation attribute. + * @return The parsed XML document as a DOM tree. + * @throws SAXException An error occurred parsing the document. + * @throws IOException An error occurred reading the document. + * @throws ParserConfigurationException An error occurred configuring the XML + * parser. + */ + public static Document parseDocument( + String xmlString, + String encoding, + boolean validating, + String externalSchemaLocations, + String externalNoNamespaceSchemaLocation, + Map parserFeatures) + throws SAXException, IOException, ParserConfigurationException { + + InputStream in = new ByteArrayInputStream(xmlString.getBytes(encoding)); + return parseDocument( + in, + validating, + externalSchemaLocations, + externalNoNamespaceSchemaLocation, + parserFeatures); + } + + /** * Parse an XML document from a String. * @@ -404,7 +465,8 @@ public class DOMUtils { in, validating, externalSchemaLocations, - externalNoNamespaceSchemaLocation); + externalNoNamespaceSchemaLocation, + null); } /** @@ -453,7 +515,26 @@ public class DOMUtils { public static Element parseXmlValidating(InputStream inputStream) throws ParserConfigurationException, SAXException, IOException { return DOMUtils - .parseDocument(inputStream, true, Constants.ALL_SCHEMA_LOCATIONS, null) + .parseDocument(inputStream, true, Constants.ALL_SCHEMA_LOCATIONS, null, null) + .getDocumentElement(); + } + + /** + * A convenience method to parse an XML document validating. + * + * @param inputStream The InputStream containing the XML + * document. + * @param parserFeatures Set additional features to XML parser + * @return The root element of the parsed XML document. + * @throws SAXException An error occurred parsing the document. + * @throws IOException An error occurred reading the document. + * @throws ParserConfigurationException An error occurred configuring the XML + * parser. + */ + public static Element parseXmlValidating(InputStream inputStream, Map parserFeatures) + throws ParserConfigurationException, SAXException, IOException { + return DOMUtils + .parseDocument(inputStream, true, Constants.ALL_SCHEMA_LOCATIONS, null, parserFeatures) .getDocumentElement(); } @@ -471,7 +552,7 @@ public class DOMUtils { public static Element parseXmlNonValidating(InputStream inputStream) throws ParserConfigurationException, SAXException, IOException { return DOMUtils - .parseDocument(inputStream, false, Constants.ALL_SCHEMA_LOCATIONS, null) + .parseDocument(inputStream, false, Constants.ALL_SCHEMA_LOCATIONS, null, null) .getDocumentElement(); } -- cgit v1.2.3