okhttp3.internal.tls.OkHostnameVerifier Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of com.liferay.document.library.opener.onedrive.web
Show all versions of com.liferay.document.library.opener.onedrive.web
Liferay Document Library Opener OneDrive Web
/*
* 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 okhttp3.internal.tls;
import java.security.cert.Certificate;
import java.security.cert.CertificateParsingException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Locale;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLException;
import javax.net.ssl.SSLSession;
import static okhttp3.internal.Util.verifyAsIpAddress;
/**
* A HostnameVerifier consistent with RFC 2818.
*/
public final class OkHostnameVerifier implements HostnameVerifier {
public static final OkHostnameVerifier INSTANCE = new OkHostnameVerifier();
private static final int ALT_DNS_NAME = 2;
private static final int ALT_IPA_NAME = 7;
private OkHostnameVerifier() {
}
@Override
public boolean verify(String host, SSLSession session) {
try {
Certificate[] certificates = session.getPeerCertificates();
return verify(host, (X509Certificate) certificates[0]);
} catch (SSLException e) {
return false;
}
}
public boolean verify(String host, X509Certificate certificate) {
return verifyAsIpAddress(host)
? verifyIpAddress(host, certificate)
: verifyHostname(host, certificate);
}
/** Returns true if {@code certificate} matches {@code ipAddress}. */
private boolean verifyIpAddress(String ipAddress, X509Certificate certificate) {
List altNames = getSubjectAltNames(certificate, ALT_IPA_NAME);
for (int i = 0, size = altNames.size(); i < size; i++) {
if (ipAddress.equalsIgnoreCase(altNames.get(i))) {
return true;
}
}
return false;
}
/** Returns true if {@code certificate} matches {@code hostname}. */
private boolean verifyHostname(String hostname, X509Certificate certificate) {
hostname = hostname.toLowerCase(Locale.US);
List altNames = getSubjectAltNames(certificate, ALT_DNS_NAME);
for (String altName : altNames) {
if (verifyHostname(hostname, altName)) {
return true;
}
}
return false;
}
public static List allSubjectAltNames(X509Certificate certificate) {
List altIpaNames = getSubjectAltNames(certificate, ALT_IPA_NAME);
List altDnsNames = getSubjectAltNames(certificate, ALT_DNS_NAME);
List result = new ArrayList<>(altIpaNames.size() + altDnsNames.size());
result.addAll(altIpaNames);
result.addAll(altDnsNames);
return result;
}
private static List getSubjectAltNames(X509Certificate certificate, int type) {
List result = new ArrayList<>();
try {
Collection subjectAltNames = certificate.getSubjectAlternativeNames();
if (subjectAltNames == null) {
return Collections.emptyList();
}
for (Object subjectAltName : subjectAltNames) {
List entry = (List) subjectAltName;
if (entry == null || entry.size() < 2) {
continue;
}
Integer altNameType = (Integer) entry.get(0);
if (altNameType == null) {
continue;
}
if (altNameType == type) {
String altName = (String) entry.get(1);
if (altName != null) {
result.add(altName);
}
}
}
return result;
} catch (CertificateParsingException e) {
return Collections.emptyList();
}
}
/**
* Returns {@code true} iff {@code hostname} matches the domain name {@code pattern}.
*
* @param hostname lower-case host name.
* @param pattern domain name pattern from certificate. May be a wildcard pattern such as {@code
* *.android.com}.
*/
public boolean verifyHostname(String hostname, String pattern) {
// Basic sanity checks
// Check length == 0 instead of .isEmpty() to support Java 5.
if ((hostname == null) || (hostname.length() == 0) || (hostname.startsWith("."))
|| (hostname.endsWith(".."))) {
// Invalid domain name
return false;
}
if ((pattern == null) || (pattern.length() == 0) || (pattern.startsWith("."))
|| (pattern.endsWith(".."))) {
// Invalid pattern/domain name
return false;
}
// Normalize hostname and pattern by turning them into absolute domain names if they are not
// yet absolute. This is needed because server certificates do not normally contain absolute
// names or patterns, but they should be treated as absolute. At the same time, any hostname
// presented to this method should also be treated as absolute for the purposes of matching
// to the server certificate.
// www.android.com matches www.android.com
// www.android.com matches www.android.com.
// www.android.com. matches www.android.com.
// www.android.com. matches www.android.com
if (!hostname.endsWith(".")) {
hostname += '.';
}
if (!pattern.endsWith(".")) {
pattern += '.';
}
// hostname and pattern are now absolute domain names.
pattern = pattern.toLowerCase(Locale.US);
// hostname and pattern are now in lower case -- domain names are case-insensitive.
if (!pattern.contains("*")) {
// Not a wildcard pattern -- hostname and pattern must match exactly.
return hostname.equals(pattern);
}
// Wildcard pattern
// WILDCARD PATTERN RULES:
// 1. Asterisk (*) is only permitted in the left-most domain name label and must be the
// only character in that label (i.e., must match the whole left-most label).
// For example, *.example.com is permitted, while *a.example.com, a*.example.com,
// a*b.example.com, a.*.example.com are not permitted.
// 2. Asterisk (*) cannot match across domain name labels.
// For example, *.example.com matches test.example.com but does not match
// sub.test.example.com.
// 3. Wildcard patterns for single-label domain names are not permitted.
if ((!pattern.startsWith("*.")) || (pattern.indexOf('*', 1) != -1)) {
// Asterisk (*) is only permitted in the left-most domain name label and must be the only
// character in that label
return false;
}
// Optimization: check whether hostname is too short to match the pattern. hostName must be at
// least as long as the pattern because asterisk must match the whole left-most label and
// hostname starts with a non-empty label. Thus, asterisk has to match one or more characters.
if (hostname.length() < pattern.length()) {
// hostname too short to match the pattern.
return false;
}
if ("*.".equals(pattern)) {
// Wildcard pattern for single-label domain name -- not permitted.
return false;
}
// hostname must end with the region of pattern following the asterisk.
String suffix = pattern.substring(1);
if (!hostname.endsWith(suffix)) {
// hostname does not end with the suffix
return false;
}
// Check that asterisk did not match across domain name labels.
int suffixStartIndexInHostname = hostname.length() - suffix.length();
if ((suffixStartIndexInHostname > 0)
&& (hostname.lastIndexOf('.', suffixStartIndexInHostname - 1) != -1)) {
// Asterisk is matching across domain name labels -- not permitted.
return false;
}
// hostname matches pattern
return true;
}
}