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/*-
* ============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.util;
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.OracleCodec;
import org.owasp.esapi.codecs.MySQLCodec.Mode;
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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