CipherSuiteConverter.java — netty Source File

Source Code

/*
 * Copyright 2014 The Netty Project
 *
 * The Netty Project 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:
 *
 *   https://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 io.netty.handler.ssl;

import io.netty.util.internal.UnstableApi;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import static java.util.Collections.singletonMap;

/**
 * Converts a Java cipher suite string to an OpenSSL cipher suite string and vice versa.
 *
 * @see <a href="https://en.wikipedia.org/wiki/Cipher_suite">Wikipedia page about cipher suite</a>
 */
@UnstableApi
public final class CipherSuiteConverter {

    private static final InternalLogger logger = InternalLoggerFactory.getInstance(CipherSuiteConverter.class);

    /**
     * A_B_WITH_C_D, where:
     *
     * A - TLS or SSL (protocol)
     * B - handshake algorithm (key exchange and authentication algorithms to be precise)
     * C - bulk cipher
     * D - HMAC algorithm
     *
     * This regular expression assumes that:
     *
     * 1) A is always TLS or SSL, and
     * 2) D is always a single word.
     */
    private static final Pattern JAVA_CIPHERSUITE_PATTERN =
            Pattern.compile("^(?:TLS|SSL)_((?:(?!_WITH_).)+)_WITH_(.*)_(.*)$");

    /**
     * A-B-C, where:
// ... (457 more lines)