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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * Copyright 2018 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 java.util.Locale;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Converts OpenSSL signature Algorithm names to
 * 
 *     Java signature Algorithm names.
 */
final class SignatureAlgorithmConverter {

    private SignatureAlgorithmConverter() { }

    // OpenSSL has 3 different formats it uses at the moment we will match against all of these.
    // For example:
    //              ecdsa-with-SHA384
    //              hmacWithSHA384
    //              dsa_with_SHA224
    //
    // For more details see https://github.com/openssl/openssl/blob/OpenSSL_1_0_2p/crypto/objects/obj_dat.h
    //
    // BoringSSL uses a different format:
    // https://github.com/google/boringssl/blob/8525ff3/ssl/ssl_privkey.cc#L436
    //
    private static final Pattern PATTERN = Pattern.compile(
            // group 1 - 2
            "(?:(^[a-zA-Z].+)With(.+)Encryption$)|" +
            // group 3 - 4
            "(?:(^[a-zA-Z].+)(?:_with_|-with-|_pkcs1_|_pss_rsae_)(.+$))|" +
            // group 5 - 6
            "(?:(^[a-zA-Z].+)_(.+$))");

    /**
     * Converts an OpenSSL algorithm name to a Java algorithm name and return it,
     * or return {@code null} if the conversation failed because the format is not known.
     */
    static String toJavaName(String opensslName) {
        if (opensslName == null) {
            return null;
        }
        Matcher matcher = PATTERN.matcher(opensslName);
        if (matcher.matches()) {
            String group1 = matcher.group(1);
            if (group1 != null) {
                return group1.toUpperCase(Locale.ROOT) + "with" + matcher.group(2).toUpperCase(Locale.ROOT);
            }
            if (matcher.group(3) != null) {
                return matcher.group(4).toUpperCase(Locale.ROOT) + "with" + matcher.group(3).toUpperCase(Locale.ROOT);
            }

            if (matcher.group(5) != null) {
                return matcher.group(6).toUpperCase(Locale.ROOT) + "with" + matcher.group(5).toUpperCase(Locale.ROOT);
            }
        }
        return null;
    }
}