/*
* 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.net.openssl.ciphers;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.util.net.Constants;
import org.apache.tomcat.util.res.StringManager;
/**
* Class in charge with parsing openSSL expressions to define a list of ciphers.
*/
public class OpenSSLCipherConfigurationParser {
private static final Log log = LogFactory.getLog(OpenSSLCipherConfigurationParser.class);
private static final StringManager sm =
StringManager.getManager("org.apache.tomcat.util.net.jsse.res");
private static boolean initialized = false;
private static final String SEPARATOR = ":|,| ";
/**
* If ! is used then the ciphers are permanently deleted from the list. The ciphers deleted can never reappear in the list
* even if they are explicitly stated.
*/
private static final String EXCLUDE = "!";
/**
* If - is used then the ciphers are deleted from the list, but some or all of the ciphers can be added again by later
* options.
*/
private static final String DELETE = "-";
/**
* If + is used then the ciphers are moved to the end of the list. This option doesn't add any new ciphers it just moves
* matching existing ones.
*/
private static final String TO_END = "+";
/**
* Lists of cipher suites can be combined in a single cipher string using the + character.
* This is used as a logical and operation.
* For example SHA1+DES represents all cipher suites containing the SHA1 and the DES algorithms.
*/
private static final String AND = "+";
/**
* All ciphers by their openssl alias name.
*/
private static final Map<String, List<Cipher>> aliases = new LinkedHashMap<>();
/**
* the 'NULL' ciphers that is those offering no encryption. Because these offer no encryption at all and are a security risk
* they are disabled unless explicitly included.
*/
private static final String eNULL = "eNULL";
/**
* The cipher suites offering no authentication. This is currently the anonymous DH algorithms. T These cipher suites are
* vulnerable to a 'man in the middle' attack and so their use is normally discouraged.
*/
private static final String aNULL = "aNULL";
/**
* 'high' encryption cipher suites. This currently means those with key lengths larger than 128 bits, and some cipher suites
* with 128-bit keys.
*/
private static final String HIGH = "HIGH";
/**
* 'medium' encryption cipher suites, currently some of those using 128 bit encryption.
*/
private static final String MEDIUM = "MEDIUM";
/**
* 'low' encryption cipher suites, currently those using 64 or 56 bit encryption algorithms but excluding export cipher
* suites.
*/
private static final String LOW = "LOW";
/**
* Export encryption algorithms. Including 40 and 56 bits algorithms.
*/
private static final String EXPORT = "EXPORT";
/**
* 40 bit export encryption algorithms.
*/
private static final String EXPORT40 = "EXPORT40";
/**
* 56 bit export encryption algorithms.
*/
private static final String EXPORT56 = "EXPORT56";
/**
* Cipher suites using RSA key exchange.
*/
private static final String kRSA = "kRSA";
/**
* Cipher suites using RSA authentication.
*/
private static final String aRSA = "aRSA";
/**
* Cipher suites using RSA for key exchange
* Despite what the docs say, RSA is equivalent to kRSA.
*/
private static final String RSA = "RSA";
/**
* Cipher suites using ephemeral DH key agreement.
*/
private static final String kEDH = "kEDH";
/**
* Cipher suites using ephemeral DH key agreement.
*/
private static final String kDHE = "kDHE";
/**
* Cipher suites using ephemeral DH key agreement. equivalent to kEDH:-ADH
*/
private static final String EDH = "EDH";
/**
* Cipher suites using ephemeral DH key agreement. equivalent to kEDH:-ADH
*/
private static final String DHE = "DHE";
/**
* Cipher suites using DH key agreement and DH certificates signed by CAs with RSA keys.
*/
private static final String kDHr = "kDHr";
/**
* Cipher suites using DH key agreement and DH certificates signed by CAs with DSS keys.
*/
private static final String kDHd = "kDHd";
/**
* Cipher suites using DH key agreement and DH certificates signed by CAs with RSA or DSS keys.
*/
private static final String kDH = "kDH";
/**
* Cipher suites using fixed ECDH key agreement signed by CAs with RSA keys.
*/
private static final String kECDHr = "kECDHr";
/**
* Cipher suites using fixed ECDH key agreement signed by CAs with ECDSA keys.
*/
private static final String kECDHe = "kECDHe";
/**
* Cipher suites using fixed ECDH key agreement signed by CAs with RSA and ECDSA keys or either respectively.
*/
private static final String kECDH = "kECDH";
/**
* Cipher suites using ephemeral ECDH key agreement, including anonymous cipher suites.
*/
private static final String kEECDH = "kEECDH";
/**
* Cipher suites using ephemeral ECDH key agreement, excluding anonymous cipher suites.
* Same as "kEECDH:-AECDH"
*/
private static final String EECDH = "EECDH";
/**
* Cipher suitesusing ECDH key exchange, including anonymous, ephemeral and fixed ECDH.
*/
private static final String ECDH = "ECDH";
/**
* Cipher suites using ephemeral ECDH key agreement, including anonymous cipher suites.
*/
private static final String kECDHE = "kECDHE";
/**
* Cipher suites using authenticated ephemeral ECDH key agreement
*/
private static final String ECDHE = "ECDHE";
/**
* Cipher suites using authenticated ephemeral ECDH key agreement
*/
private static final String EECDHE = "EECDHE";
/**
* Anonymous Elliptic Curve Diffie Hellman cipher suites.
*/
private static final String AECDH = "AECDH";
/**
* Cipher suites using DSS for key exchange
*/
private static final String DSS = "DSS";
/**
* Cipher suites using DSS authentication, i.e. the certificates carry DSS keys.
*/
private static final String aDSS = "aDSS";
/**
* Cipher suites effectively using DH authentication, i.e. the certificates carry DH keys.
*/
private static final String aDH = "aDH";
/**
* Cipher suites effectively using ECDH authentication, i.e. the certificates carry ECDH keys.
*/
private static final String aECDH = "aECDH";
/**
* Cipher suites effectively using ECDSA authentication, i.e. the certificates carry ECDSA keys.
*/
private static final String aECDSA = "aECDSA";
/**
* Cipher suites effectively using ECDSA authentication, i.e. the certificates carry ECDSA keys.
*/
private static final String ECDSA = "ECDSA";
/**
* Ciphers suites using FORTEZZA key exchange algorithms.
*/
private static final String kFZA = "kFZA";
/**
* Ciphers suites using FORTEZZA authentication algorithms.
*/
private static final String aFZA = "aFZA";
/**
* Ciphers suites using FORTEZZA encryption algorithms.
*/
private static final String eFZA = "eFZA";
/**
* Ciphers suites using all FORTEZZA algorithms.
*/
private static final String FZA = "FZA";
/**
* Cipher suites using DH, including anonymous DH, ephemeral DH and fixed DH.
*/
private static final String DH = "DH";
/**
* Anonymous DH cipher suites.
*/
private static final String ADH = "ADH";
/**
* Cipher suites using 128 bit AES.
*/
private static final String AES128 = "AES128";
/**
* Cipher suites using 256 bit AES.
*/
private static final String AES256 = "AES256";
/**
* Cipher suites using either 128 or 256 bit AES.
*/
private static final String AES = "AES";
/**
* AES in Galois Counter Mode (GCM): these cipher suites are only supported in TLS v1.2.
*/
private static final String AESGCM = "AESGCM";
/**
* AES in Counter with CBC-MAC Mode (CCM).
*/
private static final String AESCCM = "AESCCM";
/**
* AES in Counter with CBC-MAC Mode and 8-byte authentication (CCM8).
*/
private static final String AESCCM8 = "AESCCM8";
/**
* Cipher suites using 128 bit CAMELLIA.
*/
private static final String CAMELLIA128 = "CAMELLIA128";
/**
* Cipher suites using 256 bit CAMELLIA.
*/
private static final String CAMELLIA256 = "CAMELLIA256";
/**
* Cipher suites using either 128 or 256 bit CAMELLIA.
*/
private static final String CAMELLIA = "CAMELLIA";
/**
* Cipher suites using CHACHA20.
*/
private static final String CHACHA20 = "CHACHA20";
/**
* Cipher suites using triple DES.
*/
private static final String TRIPLE_DES = "3DES";
/**
* Cipher suites using DES (not triple DES).
*/
private static final String DES = "DES";
/**
* Cipher suites using RC4.
*/
private static final String RC4 = "RC4";
/**
* Cipher suites using RC2.
*/
private static final String RC2 = "RC2";
/**
* Cipher suites using IDEA.
*/
private static final String IDEA = "IDEA";
/**
* Cipher suites using SEED.
*/
private static final String SEED = "SEED";
/**
* Cipher suites using MD5.
*/
private static final String MD5 = "MD5";
/**
* Cipher suites using SHA1.
*/
private static final String SHA1 = "SHA1";
/**
* Cipher suites using SHA1.
*/
private static final String SHA = "SHA";
/**
* Cipher suites using SHA256.
*/
private static final String SHA256 = "SHA256";
/**
* Cipher suites using SHA384.
*/
private static final String SHA384 = "SHA384";
/**
* Cipher suites using KRB5.
*/
private static final String KRB5 = "KRB5";
/**
* Cipher suites using GOST R 34.10 (either 2001 or 94) for authentication.
*/
private static final String aGOST = "aGOST";
/**
* Cipher suites using GOST R 34.10-2001 for authentication.
*/
private static final String aGOST01 = "aGOST01";
/**
* Cipher suites using GOST R 34.10-94 authentication (note that R 34.10-94 standard has been expired so use GOST R
* 34.10-2001)
*/
private static final String aGOST94 = "aGOST94";
/**
* Cipher suites using using VKO 34.10 key exchange, specified in the RFC 4357.
*/
private static final String kGOST = "kGOST";
/**
* Cipher suites, using HMAC based on GOST R 34.11-94.
*/
private static final String GOST94 = "GOST94";
/**
* Cipher suites using GOST 28147-89 MAC instead of HMAC.
*/
private static final String GOST89MAC = "GOST89MAC";
/**
* Cipher suites using SRP authentication, specified in the RFC 5054.
*/
private static final String aSRP = "aSRP";
/**
* Cipher suites using SRP key exchange, specified in the RFC 5054.
*/
private static final String kSRP = "kSRP";
/**
* Same as kSRP
*/
private static final String SRP = "SRP";
/**
* Cipher suites using pre-shared keys (PSK).
*/
private static final String PSK = "PSK";
/**
* Cipher suites using PSK authentication.
*/
private static final String aPSK = "aPSK";
/**
* Cipher suites using PSK key 'exchange'.
*/
private static final String kPSK = "kPSK";
private static final String kRSAPSK = "kRSAPSK";
private static final String kECDHEPSK = "kECDHEPSK";
private static final String kDHEPSK = "kDHEPSK";
private static final String DEFAULT = "DEFAULT";
private static final String COMPLEMENTOFDEFAULT = "COMPLEMENTOFDEFAULT";
private static final String ALL = "ALL";
private static final String COMPLEMENTOFALL = "COMPLEMENTOFALL";
private static final Map<String,String> jsseToOpenSSL = new HashMap<>();
private static final void init() {
for (Cipher cipher : Cipher.values()) {
String alias = cipher.getOpenSSLAlias();
if (aliases.containsKey(alias)) {
aliases.get(alias).add(cipher);
} else {
List<Cipher> list = new ArrayList<>();
list.add(cipher);
aliases.put(alias, list);
}
aliases.put(cipher.name(), Collections.singletonList(cipher));
for (String openSSlAltName : cipher.getOpenSSLAltNames()) {
if (aliases.containsKey(openSSlAltName)) {
aliases.get(openSSlAltName).add(cipher);
} else {
List<Cipher> list = new ArrayList<>();
list.add(cipher);
aliases.put(openSSlAltName, list);
}
}
jsseToOpenSSL.put(cipher.name(), cipher.getOpenSSLAlias());
Set<String> jsseNames = cipher.getJsseNames();
for (String jsseName : jsseNames) {
jsseToOpenSSL.put(jsseName, cipher.getOpenSSLAlias());
}
}
List<Cipher> allCiphersList = Arrays.asList(Cipher.values());
Collections.reverse(allCiphersList);
LinkedHashSet<Cipher> allCiphers = defaultSort(new LinkedHashSet<>(allCiphersList));
addListAlias(eNULL, filterByEncryption(allCiphers, Collections.singleton(Encryption.eNULL)));
LinkedHashSet<Cipher> all = new LinkedHashSet<>(allCiphers);
remove(all, eNULL);
addListAlias(ALL, all);
addListAlias(HIGH, filterByEncryptionLevel(allCiphers, Collections.singleton(EncryptionLevel.HIGH)));
addListAlias(MEDIUM, filterByEncryptionLevel(allCiphers, Collections.singleton(EncryptionLevel.MEDIUM)));
addListAlias(LOW, filterByEncryptionLevel(allCiphers, Collections.singleton(EncryptionLevel.LOW)));
addListAlias(EXPORT, filterByEncryptionLevel(allCiphers, new HashSet<>(Arrays.asList(EncryptionLevel.EXP40, EncryptionLevel.EXP56))));
aliases.put("EXP", aliases.get(EXPORT));
addListAlias(EXPORT40, filterByEncryptionLevel(allCiphers, Collections.singleton(EncryptionLevel.EXP40)));
addListAlias(EXPORT56, filterByEncryptionLevel(allCiphers, Collections.singleton(EncryptionLevel.EXP56)));
aliases.put("NULL", aliases.get(eNULL));
aliases.put(COMPLEMENTOFALL, aliases.get(eNULL));
addListAlias(aNULL, filterByAuthentication(allCiphers, Collections.singleton(Authentication.aNULL)));
addListAlias(kRSA, filterByKeyExchange(allCiphers, Collections.singleton(KeyExchange.RSA)));
addListAlias(aRSA, filterByAuthentication(allCiphers, Collections.singleton(Authentication.RSA)));
// Despite what the docs say, RSA is equivalent to kRSA
aliases.put(RSA, aliases.get(kRSA));
addListAlias(kEDH, filterByKeyExchange(allCiphers, Collections.singleton(KeyExchange.EDH)));
addListAlias(kDHE, filterByKeyExchange(allCiphers, Collections.singleton(KeyExchange.EDH)));
Set<Cipher> edh = filterByKeyExchange(allCiphers, Collections.singleton(KeyExchange.EDH));
edh.removeAll(filterByAuthentication(allCiphers, Collections.singleton(Authentication.aNULL)));
addListAlias(EDH, edh);
addListAlias(DHE, edh);
addListAlias(kDHr, filterByKeyExchange(allCiphers, Collections.singleton(KeyExchange.DHr)));
addListAlias(kDHd, filterByKeyExchange(allCiphers, Collections.singleton(KeyExchange.DHd)));
addListAlias(kDH, filterByKeyExchange(allCiphers, new HashSet<>(Arrays.asList(KeyExchange.DHr, KeyExchange.DHd))));
addListAlias(kECDHr, filterByKeyExchange(allCiphers, Collections.singleton(KeyExchange.ECDHr)));
addListAlias(kECDHe, filterByKeyExchange(allCiphers, Collections.singleton(KeyExchange.ECDHe)));
addListAlias(kECDH, filterByKeyExchange(allCiphers, new HashSet<>(Arrays.asList(KeyExchange.ECDHe, KeyExchange.ECDHr))));
addListAlias(ECDH, filterByKeyExchange(allCiphers, new HashSet<>(Arrays.asList(KeyExchange.ECDHe, KeyExchange.ECDHr, KeyExchange.EECDH))));
addListAlias(kECDHE, filterByKeyExchange(allCiphers, Collections.singleton(KeyExchange.EECDH)));
Set<Cipher> ecdhe = filterByKeyExchange(allCiphers, Collections.singleton(KeyExchange.EECDH));
remove(ecdhe, aNULL);
addListAlias(ECDHE, ecdhe);
addListAlias(kEECDH, filterByKeyExchange(allCiphers, Collections.singleton(KeyExchange.EECDH)));
aliases.put(EECDHE, aliases.get(kEECDH));
Set<Cipher> eecdh = filterByKeyExchange(allCiphers, Collections.singleton(KeyExchange.EECDH));
eecdh.removeAll(filterByAuthentication(allCiphers, Collections.singleton(Authentication.aNULL)));
addListAlias(EECDH, eecdh);
addListAlias(aDSS, filterByAuthentication(allCiphers, Collections.singleton(Authentication.DSS)));
aliases.put(DSS, aliases.get(aDSS));
addListAlias(aDH, filterByAuthentication(allCiphers, Collections.singleton(Authentication.DH)));
Set<Cipher> aecdh = filterByKeyExchange(allCiphers, Collections.singleton(KeyExchange.EECDH));
addListAlias(AECDH, filterByAuthentication(aecdh, Collections.singleton(Authentication.aNULL)));
addListAlias(aECDH, filterByAuthentication(allCiphers, Collections.singleton(Authentication.ECDH)));
addListAlias(ECDSA, filterByAuthentication(allCiphers, Collections.singleton(Authentication.ECDSA)));
aliases.put(aECDSA, aliases.get(ECDSA));
addListAlias(kFZA, filterByKeyExchange(allCiphers, Collections.singleton(KeyExchange.FZA)));
addListAlias(aFZA, filterByAuthentication(allCiphers, Collections.singleton(Authentication.FZA)));
addListAlias(eFZA, filterByEncryption(allCiphers, Collections.singleton(Encryption.FZA)));
addListAlias(FZA, filter(allCiphers, null, Collections.singleton(KeyExchange.FZA), Collections.singleton(Authentication.FZA), Collections.singleton(Encryption.FZA), null, null));
addListAlias(Constants.SSL_PROTO_TLSv1_2, filterByProtocol(allCiphers, Collections.singleton(Protocol.TLSv1_2)));
addListAlias(Constants.SSL_PROTO_TLSv1_0, filterByProtocol(allCiphers, Collections.singleton(Protocol.TLSv1)));
addListAlias(Constants.SSL_PROTO_SSLv3, filterByProtocol(allCiphers, Collections.singleton(Protocol.SSLv3)));
aliases.put(Constants.SSL_PROTO_TLSv1, aliases.get(Constants.SSL_PROTO_TLSv1_0));
addListAlias(Constants.SSL_PROTO_SSLv2, filterByProtocol(allCiphers, Collections.singleton(Protocol.SSLv2)));
addListAlias(DH, filterByKeyExchange(allCiphers, new HashSet<>(Arrays.asList(KeyExchange.DHr, KeyExchange.DHd, KeyExchange.EDH))));
Set<Cipher> adh = filterByKeyExchange(allCiphers, Collections.singleton(KeyExchange.EDH));
adh.retainAll(filterByAuthentication(allCiphers, Collections.singleton(Authentication.aNULL)));
addListAlias(ADH, adh);
addListAlias(AES128, filterByEncryption(allCiphers, new HashSet<>(Arrays.asList(Encryption.AES128, Encryption.AES128CCM, Encryption.AES128CCM8, Encryption.AES128GCM))));
addListAlias(AES256, filterByEncryption(allCiphers, new HashSet<>(Arrays.asList(Encryption.AES256, Encryption.AES256CCM, Encryption.AES256CCM8, Encryption.AES256GCM))));
addListAlias(AES, filterByEncryption(allCiphers, new HashSet<>(Arrays.asList(Encryption.AES128, Encryption.AES128CCM, Encryption.AES128CCM8, Encryption.AES128GCM, Encryption.AES256, Encryption.AES256CCM, Encryption.AES256CCM8, Encryption.AES256GCM))));
addListAlias(AESGCM, filterByEncryption(allCiphers, new HashSet<>(Arrays.asList(Encryption.AES128GCM, Encryption.AES256GCM))));
addListAlias(AESCCM, filterByEncryption(allCiphers, new HashSet<>(Arrays.asList(Encryption.AES128CCM, Encryption.AES128CCM8, Encryption.AES256CCM, Encryption.AES256CCM8))));
addListAlias(AESCCM8, filterByEncryption(allCiphers, new HashSet<>(Arrays.asList(Encryption.AES128CCM8, Encryption.AES256CCM8))));
addListAlias(CAMELLIA, filterByEncryption(allCiphers, new HashSet<>(Arrays.asList(Encryption.CAMELLIA128, Encryption.CAMELLIA256))));
addListAlias(CAMELLIA128, filterByEncryption(allCiphers, Collections.singleton(Encryption.CAMELLIA128)));
addListAlias(CAMELLIA256, filterByEncryption(allCiphers, Collections.singleton(Encryption.CAMELLIA256)));
addListAlias(CHACHA20, filterByEncryption(allCiphers, Collections.singleton(Encryption.CHACHA20POLY1305)));
addListAlias(TRIPLE_DES, filterByEncryption(allCiphers, Collections.singleton(Encryption.TRIPLE_DES)));
addListAlias(DES, filterByEncryption(allCiphers, Collections.singleton(Encryption.DES)));
addListAlias(RC4, filterByEncryption(allCiphers, Collections.singleton(Encryption.RC4)));
addListAlias(RC2, filterByEncryption(allCiphers, Collections.singleton(Encryption.RC2)));
addListAlias(IDEA, filterByEncryption(allCiphers, Collections.singleton(Encryption.IDEA)));
addListAlias(SEED, filterByEncryption(allCiphers, Collections.singleton(Encryption.SEED)));
addListAlias(MD5, filterByMessageDigest(allCiphers, Collections.singleton(MessageDigest.MD5)));
addListAlias(SHA1, filterByMessageDigest(allCiphers, Collections.singleton(MessageDigest.SHA1)));
aliases.put(SHA, aliases.get(SHA1));
addListAlias(SHA256, filterByMessageDigest(allCiphers, Collections.singleton(MessageDigest.SHA256)));
addListAlias(SHA384, filterByMessageDigest(allCiphers, Collections.singleton(MessageDigest.SHA384)));
addListAlias(aGOST, filterByAuthentication(allCiphers, new HashSet<>(Arrays.asList(Authentication.GOST01, Authentication.GOST94))));
addListAlias(aGOST01, filterByAuthentication(allCiphers, Collections.singleton(Authentication.GOST01)));
addListAlias(aGOST94, filterByAuthentication(allCiphers, Collections.singleton(Authentication.GOST94)));
addListAlias(kGOST, filterByKeyExchange(allCiphers, Collections.singleton(KeyExchange.GOST)));
addListAlias(GOST94, filterByMessageDigest(allCiphers, Collections.singleton(MessageDigest.GOST94)));
addListAlias(GOST89MAC, filterByMessageDigest(allCiphers, Collections.singleton(MessageDigest.GOST89MAC)));
addListAlias(PSK, filter(allCiphers, null, new HashSet<>(Arrays.asList(KeyExchange.PSK, KeyExchange.RSAPSK, KeyExchange.DHEPSK, KeyExchange.ECDHEPSK)), Collections.singleton(Authentication.PSK), null, null, null));
addListAlias(aPSK, filterByAuthentication(allCiphers, Collections.singleton(Authentication.PSK)));
addListAlias(kPSK, filterByKeyExchange(allCiphers, Collections.singleton(KeyExchange.PSK)));
addListAlias(kRSAPSK, filterByKeyExchange(allCiphers, Collections.singleton(KeyExchange.RSAPSK)));
addListAlias(kECDHEPSK, filterByKeyExchange(allCiphers, Collections.singleton(KeyExchange.ECDHEPSK)));
addListAlias(kDHEPSK, filterByKeyExchange(allCiphers, Collections.singleton(KeyExchange.DHEPSK)));
addListAlias(KRB5, filter(allCiphers, null, Collections.singleton(KeyExchange.KRB5), Collections.singleton(Authentication.KRB5), null, null, null));
addListAlias(aSRP, filterByAuthentication(allCiphers, Collections.singleton(Authentication.SRP)));
addListAlias(kSRP, filterByKeyExchange(allCiphers, Collections.singleton(KeyExchange.SRP)));
addListAlias(SRP, filterByKeyExchange(allCiphers, Collections.singleton(KeyExchange.SRP)));
initialized = true;
// Despite what the OpenSSL docs say, DEFAULT also excludes SSLv2
addListAlias(DEFAULT, parse("ALL:!EXPORT:!eNULL:!aNULL:!SSLv2:!DES:!RC2:!RC4:!DSS:!SEED:!IDEA:!CAMELLIA:!AESCCM:!3DES"));
// COMPLEMENTOFDEFAULT is also not exactly as defined by the docs
LinkedHashSet<Cipher> complementOfDefault = filterByKeyExchange(all, new HashSet<>(Arrays.asList(KeyExchange.EDH,KeyExchange.EECDH)));
complementOfDefault = filterByAuthentication(complementOfDefault, Collections.singleton(Authentication.aNULL));
complementOfDefault.removeAll(aliases.get(eNULL));
complementOfDefault.addAll(aliases.get(Constants.SSL_PROTO_SSLv2));
complementOfDefault.addAll(aliases.get(EXPORT));
complementOfDefault.addAll(aliases.get(DES));
complementOfDefault.addAll(aliases.get(TRIPLE_DES));
complementOfDefault.addAll(aliases.get(RC2));
complementOfDefault.addAll(aliases.get(RC4));
complementOfDefault.addAll(aliases.get(aDSS));
complementOfDefault.addAll(aliases.get(SEED));
complementOfDefault.addAll(aliases.get(IDEA));
complementOfDefault.addAll(aliases.get(CAMELLIA));
complementOfDefault.addAll(aliases.get(AESCCM));
defaultSort(complementOfDefault);
addListAlias(COMPLEMENTOFDEFAULT, complementOfDefault);
}
static void addListAlias(String alias, Set<Cipher> ciphers) {
aliases.put(alias, new ArrayList<>(ciphers));
}
static void moveToEnd(final LinkedHashSet<Cipher> ciphers, final String alias) {
moveToEnd(ciphers, aliases.get(alias));
}
static void moveToEnd(final LinkedHashSet<Cipher> ciphers, final Collection<Cipher> toBeMovedCiphers) {
List<Cipher> movedCiphers = new ArrayList<>(toBeMovedCiphers);
movedCiphers.retainAll(ciphers);
ciphers.removeAll(movedCiphers);
ciphers.addAll(movedCiphers);
}
static void moveToStart(final LinkedHashSet<Cipher> ciphers, final Collection<Cipher> toBeMovedCiphers) {
List<Cipher> movedCiphers = new ArrayList<>(toBeMovedCiphers);
List<Cipher> originalCiphers = new ArrayList<>(ciphers);
movedCiphers.retainAll(ciphers);
ciphers.clear();
ciphers.addAll(movedCiphers);
ciphers.addAll(originalCiphers);
}
static void add(final LinkedHashSet<Cipher> ciphers, final String alias) {
ciphers.addAll(aliases.get(alias));
}
static void remove(final Set<Cipher> ciphers, final String alias) {
ciphers.removeAll(aliases.get(alias));
}
static LinkedHashSet<Cipher> strengthSort(final LinkedHashSet<Cipher> ciphers) {
/*
* This routine sorts the ciphers with descending strength. The sorting
* must keep the pre-sorted sequence, so we apply the normal sorting
* routine as '+' movement to the end of the list.
*/
Set<Integer> keySizes = new HashSet<>();
for (Cipher cipher : ciphers) {
keySizes.add(Integer.valueOf(cipher.getStrength_bits()));
}
List<Integer> strength_bits = new ArrayList<>(keySizes);
Collections.sort(strength_bits);
Collections.reverse(strength_bits);
final LinkedHashSet<Cipher> result = new LinkedHashSet<>(ciphers);
for (int strength : strength_bits) {
moveToEnd(result, filterByStrengthBits(ciphers, strength));
}
return result;
}
/*
* See
* https://github.com/openssl/openssl/blob/7c96dbcdab959fef74c4caae63cdebaa354ab252/ssl/ssl_ciph.c#L1371
*/
static LinkedHashSet<Cipher> defaultSort(final LinkedHashSet<Cipher> ciphers) {
final LinkedHashSet<Cipher> result = new LinkedHashSet<>(ciphers.size());
final LinkedHashSet<Cipher> ecdh = new LinkedHashSet<>(ciphers.size());
/* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */
ecdh.addAll(filterByKeyExchange(ciphers, Collections.singleton(KeyExchange.EECDH)));
/* AES is our preferred symmetric cipher */
Set<Encryption> aes = new HashSet<>(Arrays.asList(Encryption.AES128, Encryption.AES128CCM,
Encryption.AES128CCM8, Encryption.AES128GCM, Encryption.AES256,
Encryption.AES256CCM, Encryption.AES256CCM8, Encryption.AES256GCM));
/* Now arrange all ciphers by preference: */
result.addAll(filterByEncryption(ecdh, aes));
result.addAll(filterByEncryption(ciphers, aes));
/* Add everything else */
result.addAll(ecdh);
result.addAll(ciphers);
/* Low priority for MD5 */
moveToEnd(result, filterByMessageDigest(result, Collections.singleton(MessageDigest.MD5)));
/* Move anonymous ciphers to the end. Usually, these will remain disabled.
* (For applications that allow them, they aren't too bad, but we prefer
* authenticated ciphers.) */
moveToEnd(result, filterByAuthentication(result, Collections.singleton(Authentication.aNULL)));
/* Move ciphers without forward secrecy to the end */
moveToEnd(result, filterByAuthentication(result, Collections.singleton(Authentication.ECDH)));
moveToEnd(result, filterByKeyExchange(result, Collections.singleton(KeyExchange.RSA)));
moveToEnd(result, filterByKeyExchange(result, Collections.singleton(KeyExchange.PSK)));
/* RC4 is sort-of broken -- move the the end */
moveToEnd(result, filterByEncryption(result, Collections.singleton(Encryption.RC4)));
return strengthSort(result);
}
static Set<Cipher> filterByStrengthBits(Set<Cipher> ciphers, int strength_bits) {
Set<Cipher> result = new LinkedHashSet<>(ciphers.size());
for (Cipher cipher : ciphers) {
if (cipher.getStrength_bits() == strength_bits) {
result.add(cipher);
}
}
return result;
}
static Set<Cipher> filterByProtocol(Set<Cipher> ciphers, Set<Protocol> protocol) {
return filter(ciphers, protocol, null, null, null, null, null);
}
static LinkedHashSet<Cipher> filterByKeyExchange(Set<Cipher> ciphers, Set<KeyExchange> kx) {
return filter(ciphers, null, kx, null, null, null, null);
}
static LinkedHashSet<Cipher> filterByAuthentication(Set<Cipher> ciphers, Set<Authentication> au) {
return filter(ciphers, null, null, au, null, null, null);
}
static Set<Cipher> filterByEncryption(Set<Cipher> ciphers, Set<Encryption> enc) {
return filter(ciphers, null, null, null, enc, null, null);
}
static Set<Cipher> filterByEncryptionLevel(Set<Cipher> ciphers, Set<EncryptionLevel> level) {
return filter(ciphers, null, null, null, null, level, null);
}
static Set<Cipher> filterByMessageDigest(Set<Cipher> ciphers, Set<MessageDigest> mac) {
return filter(ciphers, null, null, null, null, null, mac);
}
static LinkedHashSet<Cipher> filter(Set<Cipher> ciphers, Set<Protocol> protocol, Set<KeyExchange> kx,
Set<Authentication> au, Set<Encryption> enc, Set<EncryptionLevel> level, Set<MessageDigest> mac) {
LinkedHashSet<Cipher> result = new LinkedHashSet<>(ciphers.size());
for (Cipher cipher : ciphers) {
if (protocol != null && protocol.contains(cipher.getProtocol())) {
result.add(cipher);
}
if (kx != null && kx.contains(cipher.getKx())) {
result.add(cipher);
}
if (au != null && au.contains(cipher.getAu())) {
result.add(cipher);
}
if (enc != null && enc.contains(cipher.getEnc())) {
result.add(cipher);
}
if (level != null && level.contains(cipher.getLevel())) {
result.add(cipher);
}
if (mac != null && mac.contains(cipher.getMac())) {
result.add(cipher);
}
}
return result;
}
public static LinkedHashSet<Cipher> parse(String expression) {
if (!initialized) {
init();
}
String[] elements = expression.split(SEPARATOR);
LinkedHashSet<Cipher> ciphers = new LinkedHashSet<>();
Set<Cipher> removedCiphers = new HashSet<>();
for (String element : elements) {
if (element.startsWith(DELETE)) {
String alias = element.substring(1);
if (aliases.containsKey(alias)) {
remove(ciphers, alias);
}
} else if (element.startsWith(EXCLUDE)) {
String alias = element.substring(1);
if (aliases.containsKey(alias)) {
removedCiphers.addAll(aliases.get(alias));
} else {
log.warn(sm.getString("jsse.openssl.unknownElement", alias));
}
} else if (element.startsWith(TO_END)) {
String alias = element.substring(1);
if (aliases.containsKey(alias)) {
moveToEnd(ciphers, alias);
}
} else if ("@STRENGTH".equals(element)) {
strengthSort(ciphers);
break;
} else if (aliases.containsKey(element)) {
add(ciphers, element);
} else if (element.contains(AND)) {
String[] intersections = element.split("\\" + AND);
if(intersections.length > 0 && aliases.containsKey(intersections[0])) {
List<Cipher> result = new ArrayList<>(aliases.get(intersections[0]));
for(int i = 1; i < intersections.length; i++) {
if(aliases.containsKey(intersections[i])) {
result.retainAll(aliases.get(intersections[i]));
}
}
ciphers.addAll(result);
}
}
}
ciphers.removeAll(removedCiphers);
return ciphers;
}
public static List<String> convertForJSSE(Collection<Cipher> ciphers) {
List<String> result = new ArrayList<>(ciphers.size());
for (Cipher cipher : ciphers) {
result.addAll(cipher.getJsseNames());
}
if (log.isDebugEnabled()) {
log.debug(sm.getString("jsse.openssl.effectiveCiphers", displayResult(ciphers, true, ",")));
}
return result;
}
/**
* Parse the specified expression according to the OpenSSL syntax and
* returns a list of standard JSSE cipher names.
*
* @param expression the openssl expression to define a list of cipher.
* @return the corresponding list of ciphers.
*/
public static List<String> parseExpression(String expression) {
return convertForJSSE(parse(expression));
}
/**
* Converts a JSSE cipher name to an OpenSSL cipher name.
*
* @param jsseCipherName The JSSE name for a cipher
*
* @return The OpenSSL name for the specified JSSE cipher
*/
public static String jsseToOpenSSL(String jsseCipherName) {
if (!initialized) {
init();
}
return jsseToOpenSSL.get(jsseCipherName);
}
/**
* Converts an OpenSSL cipher name to a JSSE cipher name.
*
* @param opensslCipherName The OpenSSL name for a cipher
*
* @return The JSSE name for the specified OpenSSL cipher. If none is known,
* the IANA standard name will be returned instead
*/
public static String openSSLToJsse(String opensslCipherName) {
if (!initialized) {
init();
}
List<Cipher> ciphers = aliases.get(opensslCipherName);
if (ciphers == null || ciphers.size() != 1) {
// Not an OpenSSL cipher name
return null;
}
Cipher cipher = ciphers.get(0);
// Each Cipher always has at least one JSSE name
return cipher.getJsseNames().iterator().next();
}
static String displayResult(Collection<Cipher> ciphers, boolean useJSSEFormat, String separator) {
if (ciphers.isEmpty()) {
return "";
}
StringBuilder builder = new StringBuilder(ciphers.size() * 16);
for (Cipher cipher : ciphers) {
if (useJSSEFormat) {
for (String name : cipher.getJsseNames()) {
builder.append(name);
builder.append(separator);
}
} else {
builder.append(cipher.getOpenSSLAlias());
}
builder.append(separator);
}
return builder.toString().substring(0, builder.length() - 1);
}
}