/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file 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.
*/
package org.apache.tomcat.util.http;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.util.BitSet;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.util.buf.ByteChunk;
import org.apache.tomcat.util.buf.MessageBytes;
import org.apache.tomcat.util.http.parser.Cookie;
import org.apache.tomcat.util.res.StringManager;
public class Rfc6265CookieProcessor implements CookieProcessor {
private static final Log log = LogFactory.getLog(Rfc6265CookieProcessor.class);
private static final StringManager sm =
StringManager.getManager(Rfc6265CookieProcessor.class.getPackage().getName());
private static final BitSet domainValid = new BitSet(128);
static {
for (char c = '0'; c < '9'; c++) {
domainValid.set(c);
}
for (char c = 'a'; c < 'z'; c++) {
domainValid.set(c);
}
for (char c = 'A'; c < 'Z'; c++) {
domainValid.set(c);
}
domainValid.set('.');
domainValid.set('-');
}
@Override
public Charset getCharset() {
return StandardCharsets.UTF_8;
}
@Override
public void parseCookieHeader(MimeHeaders headers,
ServerCookies serverCookies) {
if (headers == null) {
// nothing to process
return;
}
// process each "cookie" header
int pos = headers.findHeader("Cookie", 0);
while (pos >= 0) {
MessageBytes cookieValue = headers.getValue(pos);
if (cookieValue != null && !cookieValue.isNull() ) {
if (cookieValue.getType() != MessageBytes.T_BYTES ) {
Exception e = new Exception();
log.warn("Cookies: Parsing cookie as String. Expected bytes.", e);
cookieValue.toBytes();
}
if (log.isDebugEnabled()) {
log.debug("Cookies: Parsing b[]: " + cookieValue.toString());
}
ByteChunk bc = cookieValue.getByteChunk();
Cookie.parseCookie(bc.getBytes(), bc.getOffset(), bc.getLength(),
serverCookies);
}
// search from the next position
pos = headers.findHeader("Cookie", ++pos);
}
}
@Override
public String generateHeader(javax.servlet.http.Cookie cookie) {
StringBuilder header = new StringBuilder();
// TODO: Name validation takes place in Cookie and can not be configured
// per Context. Moving it to here would allow per Context config
// but delay validation until the header is generated. However,
// the spec requires an IllegalArgumentException on Cookie
// generation.
header.append(cookie.getName());
header.append('=');
String value = cookie.getValue();
if (value != null && value.length() > 0) {
validateCookieValue(value);
header.append(value);
}
// RFC 6265 prefers Max-Age to Expires so use Max-Age
int maxAge = cookie.getMaxAge();
if (maxAge > -1) {
// Negative Max-Age is equivalent to no Max-Age
header.append(";Max-Age=");
header.append(maxAge);
}
String domain = cookie.getDomain();
if (domain != null && domain.length() > 0) {
validateDomain(domain);
header.append(";domain=");
header.append(domain);
}
String path = cookie.getPath();
if (path != null && path.length() > 0) {
validatePath(path);
header.append(";path=");
header.append(path);
}
if (cookie.getSecure()) {
header.append(";Secure");
}
if (cookie.isHttpOnly()) {
header.append(";HttpOnly");
}
return header.toString();
}
private void validateCookieValue(String value) {
int start = 0;
int end = value.length();
if (end > 1 && value.charAt(0) == '"' && value.charAt(end - 1) == '"') {
start = 1;
end--;
}
char[] chars = value.toCharArray();
for (int i = start; i < end; i++) {
char c = chars[i];
if (c < 0x21 || c == 0x22 || c == 0x2c || c == 0x3b || c == 0x5c || c == 0x7f) {
throw new IllegalArgumentException(sm.getString(
"rfc6265CookieProcessor.invalidCharInValue", Integer.toString(c)));
}
}
}
private void validateDomain(String domain) {
int i = 0;
int prev = -1;
int cur = -1;
char[] chars = domain.toCharArray();
while (i < chars.length) {
prev = cur;
cur = chars[i];
if (!domainValid.get(cur)) {
throw new IllegalArgumentException(sm.getString(
"rfc6265CookieProcessor.invalidDomain", domain));
}
// labels must start with a letter or number
if ((prev == '.' || prev == -1) && (cur == '.' || cur == '-')) {
throw new IllegalArgumentException(sm.getString(
"rfc6265CookieProcessor.invalidDomain", domain));
}
// labels must end with a letter or number
if (prev == '-' && cur == '.') {
throw new IllegalArgumentException(sm.getString(
"rfc6265CookieProcessor.invalidDomain", domain));
}
i++;
}
// domain must end with a label
if (cur == '.' || cur == '-') {
throw new IllegalArgumentException(sm.getString(
"rfc6265CookieProcessor.invalidDomain", domain));
}
}
private void validatePath(String path) {
char[] chars = path.toCharArray();
for (int i = 0; i < chars.length; i++) {
char ch = chars[i];
if (ch < 0x20 || ch > 0x7E || ch == ';') {
throw new IllegalArgumentException(sm.getString(
"rfc6265CookieProcessor.invalidPath", path));
}
}
}
}