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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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/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2016 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * Licensed 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.wildfly.security.password.impl;

import java.nio.charset.Charset;
import java.nio.charset.CharsetEncoder;
import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;

import org.wildfly.common.bytes.ByteStringBuilder;

/**
 * Common utility functions used by Digest authentication mechanisms.
 *
 * @author Darran Lofthouse
 * @author Peter Skopek.
 */
class DigestUtil {

    public static byte[] userRealmPasswordDigest(MessageDigest messageDigest, String username, String realm, char[] password) {
        return userRealmPasswordDigest(messageDigest, username, realm, password, StandardCharsets.UTF_8);
    }

    public static byte[] userRealmPasswordDigest(MessageDigest messageDigest, String username, String realm, char[] password, Charset chosenCharset) {
        CharsetEncoder latin1Encoder = StandardCharsets.ISO_8859_1.newEncoder();
        latin1Encoder.reset();
        boolean bothLatin1 = latin1Encoder.canEncode(username);
        latin1Encoder.reset();
        if (bothLatin1) {
            for (char c: password) {
                bothLatin1 = bothLatin1 && latin1Encoder.canEncode(c);
            }
        }

        ByteStringBuilder urp = new ByteStringBuilder(); // username:realm:password
        urp.append(username.getBytes(chosenCharset));
        urp.append(':');
        if (realm != null) {
            urp.append(realm.getBytes((chosenCharset)));
        } else {
            urp.append("");
        }
        urp.append(':');
        urp.append(new String(password).getBytes((chosenCharset)));

        return messageDigest.digest(urp.toArray());
    }

}