--- /dev/null
+/*-
+ * ============LICENSE_START==========================================
+ * ONAP Portal
+ * ===================================================================
+ * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
+ * ===================================================================
+ *
+ * Unless otherwise specified, all software contained herein is licensed
+ * under the Apache License, Version 2.0 (the "License");
+ * you may not use this software except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * Unless otherwise specified, all documentation contained herein is licensed
+ * under the Creative Commons License, Attribution 4.0 Intl. (the "License");
+ * you may not use this documentation except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://creativecommons.org/licenses/by/4.0/
+ *
+ * Unless required by applicable law or agreed to in writing, documentation
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * ============LICENSE_END============================================
+ *
+ * ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ */
+package org.onap.portalapp.filter;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReentrantLock;
+import java.util.regex.Pattern;
+
+import org.apache.commons.lang.NotImplementedException;
+import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringEscapeUtils;
+import org.onap.portalsdk.core.logging.logic.EELFLoggerDelegate;
+import org.onap.portalsdk.core.util.SystemProperties;
+import org.owasp.esapi.ESAPI;
+import org.owasp.esapi.codecs.Codec;
+import org.owasp.esapi.codecs.MySQLCodec;
+import org.owasp.esapi.codecs.MySQLCodec.Mode;
+import org.owasp.esapi.codecs.OracleCodec;
+
+public class SecurityXssValidator {
+
+ private EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(SecurityXssValidator.class);
+
+ private static final String MYSQL_DB = "mysql";
+ private static final String ORACLE_DB = "oracle";
+ private static final String MARIA_DB = "mariadb";
+ private static final int FLAGS = Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL;
+ static SecurityXssValidator validator = null;
+ private static Codec instance;
+ private static final Lock lock = new ReentrantLock();
+
+ public static SecurityXssValidator getInstance() {
+
+ if (validator == null) {
+ lock.lock();
+ try {
+ if (validator == null)
+ validator = new SecurityXssValidator();
+ } finally {
+ lock.unlock();
+ }
+ }
+
+ return validator;
+ }
+
+ private SecurityXssValidator() {
+ // Avoid anything between script tags
+ XSS_INPUT_PATTERNS.add(Pattern.compile("<script>(.*?)</script>", FLAGS));
+
+ // avoid iframes
+ XSS_INPUT_PATTERNS.add(Pattern.compile("<iframe(.*?)>(.*?)</iframe>", FLAGS));
+
+ // Avoid anything in a src='...' type of expression
+ XSS_INPUT_PATTERNS.add(Pattern.compile("src[\r\n]*=[\r\n]*\\\'(.*?)\\\'", FLAGS));
+
+ XSS_INPUT_PATTERNS.add(Pattern.compile("src[\r\n]*=[\r\n]*\\\"(.*?)\\\"", FLAGS));
+
+ XSS_INPUT_PATTERNS.add(Pattern.compile("src[\r\n]*=[\r\n]*([^>]+)", FLAGS));
+
+ // Remove any lonesome </script> tag
+ XSS_INPUT_PATTERNS.add(Pattern.compile("</script>", FLAGS));
+
+ XSS_INPUT_PATTERNS.add(Pattern.compile(".*(<script>|</script>).*", FLAGS));
+
+ XSS_INPUT_PATTERNS.add(Pattern.compile(".*(<iframe>|</iframe>).*", FLAGS));
+
+ // Remove any lonesome <script ...> tag
+ XSS_INPUT_PATTERNS.add(Pattern.compile("<script(.*?)>", FLAGS));
+
+ // Avoid eval(...) expressions
+ XSS_INPUT_PATTERNS.add(Pattern.compile("eval\\((.*?)\\)", FLAGS));
+
+ // Avoid expression(...) expressions
+ XSS_INPUT_PATTERNS.add(Pattern.compile("expression\\((.*?)\\)", FLAGS));
+
+ // Avoid javascript:... expressions
+ XSS_INPUT_PATTERNS.add(Pattern.compile(".*(javascript:|vbscript:).*", FLAGS));
+
+ // Avoid onload= expressions
+ XSS_INPUT_PATTERNS.add(Pattern.compile(".*(onload(.*?)=).*", FLAGS));
+ }
+
+ private List<Pattern> XSS_INPUT_PATTERNS = new ArrayList<Pattern>();
+
+ /**
+ * * This method takes a string and strips out any potential script injections.
+ *
+ * @param value
+ * @return String - the new "sanitized" string.
+ */
+ public String stripXSS(String value) {
+
+ try {
+
+ if (StringUtils.isNotBlank(value)) {
+
+ value = StringEscapeUtils.escapeHtml4(value);
+
+ value = ESAPI.encoder().canonicalize(value);
+
+ // Avoid null characters
+ value = value.replaceAll("\0", "");
+
+ for (Pattern xssInputPattern : XSS_INPUT_PATTERNS) {
+ value = xssInputPattern.matcher(value).replaceAll("");
+ }
+ }
+
+ } catch (Exception e) {
+ logger.error(EELFLoggerDelegate.errorLogger, "stripXSS() failed", e);
+ }
+
+ return value;
+ }
+
+ public Boolean denyXSS(String value) {
+ Boolean flag = Boolean.FALSE;
+ try {
+ if (StringUtils.isNotBlank(value)) {
+ value = ESAPI.encoder().canonicalize(value);
+ for (Pattern xssInputPattern : XSS_INPUT_PATTERNS) {
+ if (xssInputPattern.matcher(value).matches()) {
+ flag = Boolean.TRUE;
+ break;
+ }
+
+ }
+ }
+
+ } catch (Exception e) {
+ logger.error(EELFLoggerDelegate.errorLogger, "denyXSS() failed", e);
+ }
+
+ return flag;
+ }
+
+ public Codec getCodec() {
+ try {
+ if (null == instance) {
+ if (StringUtils.containsIgnoreCase(SystemProperties.getProperty(SystemProperties.DB_DRIVER), MYSQL_DB)
+ || StringUtils.containsIgnoreCase(SystemProperties.getProperty(SystemProperties.DB_DRIVER),
+ MARIA_DB)) {
+ instance = new MySQLCodec(Mode.STANDARD);
+
+ } else if (StringUtils.containsIgnoreCase(SystemProperties.getProperty(SystemProperties.DB_DRIVER),
+ ORACLE_DB)) {
+ instance = new OracleCodec();
+ } else {
+ throw new NotImplementedException("Handling for data base \""
+ + SystemProperties.getProperty(SystemProperties.DB_DRIVER) + "\" not yet implemented.");
+ }
+ }
+
+ } catch (Exception ex) {
+ logger.error(EELFLoggerDelegate.errorLogger, "getCodec() failed", ex);
+ }
+ return instance;
+
+ }
+
+ public List<Pattern> getXSS_INPUT_PATTERNS() {
+ return XSS_INPUT_PATTERNS;
+ }
+
+ public void setXSS_INPUT_PATTERNS(List<Pattern> xSS_INPUT_PATTERNS) {
+ XSS_INPUT_PATTERNS = xSS_INPUT_PATTERNS;
+ }
+
+}
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Code Review / portal.git / blobdiff