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/*
* 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 com.bugvm.conscrypt;
import java.net.Socket;
import java.security.KeyStore;
import java.security.KeyStore.PrivateKeyEntry;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.Principal;
import java.security.PrivateKey;
import java.security.UnrecoverableEntryException;
import java.security.cert.Certificate;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.List;
import java.util.Locale;
import javax.net.ssl.SSLEngine;
import javax.net.ssl.X509ExtendedKeyManager;
import javax.security.auth.x500.X500Principal;
/**
* KeyManager implementation.
*
* This implementation uses hashed key store information. It works faster than retrieving all of the
* data from the key store. Any key store changes, that happen after key manager was created, have
* no effect. The implementation does not use peer information (host, port) that may be obtained
* from socket or engine.
*
* @see javax.net.ssl.KeyManager
*
*/
public class KeyManagerImpl extends X509ExtendedKeyManager {
// hashed key store information
private final Hashtable hash;
/**
* Creates Key manager
*
* @param keyStore
* @param pwd
*/
public KeyManagerImpl(KeyStore keyStore, char[] pwd) {
this.hash = new Hashtable();
final Enumeration aliases;
try {
aliases = keyStore.aliases();
} catch (KeyStoreException e) {
return;
}
for (; aliases.hasMoreElements();) {
final String alias = aliases.nextElement();
try {
if (keyStore.entryInstanceOf(alias, KeyStore.PrivateKeyEntry.class)) {
final KeyStore.PrivateKeyEntry entry = (KeyStore.PrivateKeyEntry) keyStore
.getEntry(alias, new KeyStore.PasswordProtection(pwd));
hash.put(alias, entry);
}
} catch (KeyStoreException e) {
continue;
} catch (UnrecoverableEntryException e) {
continue;
} catch (NoSuchAlgorithmException e) {
continue;
}
}
}
public String chooseClientAlias(String[] keyTypes, Principal[] issuers, Socket socket) {
final String[] al = chooseAlias(keyTypes, issuers);
return (al == null ? null : al[0]);
}
public String chooseServerAlias(String keyType, Principal[] issuers, Socket socket) {
final String[] al = chooseAlias(new String[] { keyType }, issuers);
return (al == null ? null : al[0]);
}
public X509Certificate[] getCertificateChain(String alias) {
if (alias == null) {
return null;
}
if (hash.containsKey(alias)) {
Certificate[] certs = hash.get(alias).getCertificateChain();
if (certs[0] instanceof X509Certificate) {
X509Certificate[] xcerts = new X509Certificate[certs.length];
for (int i = 0; i < certs.length; i++) {
xcerts[i] = (X509Certificate) certs[i];
}
return xcerts;
}
}
return null;
}
public String[] getClientAliases(String keyType, Principal[] issuers) {
return chooseAlias(new String[] { keyType }, issuers);
}
public String[] getServerAliases(String keyType, Principal[] issuers) {
return chooseAlias(new String[] { keyType }, issuers);
}
public PrivateKey getPrivateKey(String alias) {
if (alias == null) {
return null;
}
if (hash.containsKey(alias)) {
return hash.get(alias).getPrivateKey();
}
return null;
}
@Override
public String chooseEngineClientAlias(String[] keyTypes, Principal[] issuers, SSLEngine engine) {
final String[] al = chooseAlias(keyTypes, issuers);
return (al == null ? null : al[0]);
}
@Override
public String chooseEngineServerAlias(String keyType, Principal[] issuers, SSLEngine engine) {
final String[] al = chooseAlias(new String[] { keyType }, issuers);
return (al == null ? null : al[0]);
}
private String[] chooseAlias(String[] keyTypes, Principal[] issuers) {
if (keyTypes == null || keyTypes.length == 0) {
return null;
}
List issuersList = (issuers == null) ? null : Arrays.asList(issuers);
ArrayList found = new ArrayList();
for (Enumeration aliases = hash.keys(); aliases.hasMoreElements();) {
final String alias = aliases.nextElement();
final KeyStore.PrivateKeyEntry entry = hash.get(alias);
final Certificate[] chain = entry.getCertificateChain();
final Certificate cert = chain[0];
final String certKeyAlg = cert.getPublicKey().getAlgorithm();
final String certSigAlg = (cert instanceof X509Certificate
? ((X509Certificate) cert).getSigAlgName().toUpperCase(Locale.US)
: null);
for (String keyAlgorithm : keyTypes) {
if (keyAlgorithm == null) {
continue;
}
final String sigAlgorithm;
// handle cases like EC_EC and EC_RSA
int index = keyAlgorithm.indexOf('_');
if (index == -1) {
sigAlgorithm = null;
} else {
sigAlgorithm = keyAlgorithm.substring(index + 1);
keyAlgorithm = keyAlgorithm.substring(0, index);
}
// key algorithm does not match
if (!certKeyAlg.equals(keyAlgorithm)) {
continue;
}
/*
* TODO find a more reliable test for signature
* algorithm. Unfortunately value varies with
* provider. For example for "EC" it could be
* "SHA1WithECDSA" or simply "ECDSA".
*/
// sig algorithm does not match
if (sigAlgorithm != null && certSigAlg != null
&& !certSigAlg.contains(sigAlgorithm)) {
continue;
}
// no issuers to match, just add to return list and continue
if (issuers == null || issuers.length == 0) {
found.add(alias);
continue;
}
// check that a certificate in the chain was issued by one of the specified issuers
for (Certificate certFromChain : chain) {
if (!(certFromChain instanceof X509Certificate)) {
// skip non-X509Certificates
continue;
}
X509Certificate xcertFromChain = (X509Certificate) certFromChain;
/*
* Note use of X500Principal from
* getIssuerX500Principal as opposed to Principal
* from getIssuerDN. Principal.equals test does
* not work in the case where
* xcertFromChain.getIssuerDN is a bouncycastle
* org.bouncycastle.jce.X509Principal.
*/
X500Principal issuerFromChain = xcertFromChain.getIssuerX500Principal();
if (issuersList.contains(issuerFromChain)) {
found.add(alias);
}
}
}
}
if (!found.isEmpty()) {
return found.toArray(new String[found.size()]);
}
return null;
}
}
