org.wildfly.security.mechanism.oauth2.OAuth2Client Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of wildfly-client-all

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).

There is a newer version: 34.0.0.Final

Show newest version

/*
 * 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.mechanism.oauth2;

import org.wildfly.common.bytes.ByteStringBuilder;
import org.wildfly.common.iteration.ByteIterator;
import org.wildfly.security.auth.callback.CredentialCallback;
import org.wildfly.security.credential.BearerTokenCredential;
import org.wildfly.security.mechanism._private.ElytronMessages;
import org.wildfly.security.mechanism._private.MechanismUtil;
import org.wildfly.security.mechanism.AuthenticationMechanismException;
import org.wildfly.security.sasl.util.StringPrep;

import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.UnsupportedCallbackException;

import static org.wildfly.common.Assert.assertTrue;

/**
 * @author Pedro Igor
 */
public class OAuth2Client {

    private static final String KV_DELIMITER = "%x01";

    private final CallbackHandler callbackHandler;
    private final String authorizationId;
    private ElytronMessages log;

    public OAuth2Client(String authorizationId, CallbackHandler callbackHandler, ElytronMessages log) {
        this.authorizationId = authorizationId;
        this.callbackHandler = callbackHandler;
        this.log = log;
    }

    public OAuth2InitialClientMessage getInitialResponse() throws AuthenticationMechanismException {
        final CredentialCallback credentialCallback = new CredentialCallback(BearerTokenCredential.class);

        try {
            MechanismUtil.handleCallbacks(log, this.callbackHandler, credentialCallback);
        } catch (UnsupportedCallbackException e) {
            throw log.mechCallbackHandlerUnsupportedCallback(e);
        }

        assertTrue(credentialCallback.isCredentialTypeSupported(BearerTokenCredential.class));

        final String token = credentialCallback.applyToCredential(BearerTokenCredential.class, BearerTokenCredential::getToken);

        if (token == null) {
            throw log.mechNoTokenGiven();
        }

        final ByteStringBuilder encoded = new ByteStringBuilder();

        encoded.append("n").append(",");

        if (this.authorizationId != null) {
            encoded.append('a').append('=');
            StringPrep.encode(this.authorizationId, encoded, StringPrep.PROFILE_SASL_STORED | StringPrep.MAP_SCRAM_LOGIN_CHARS);
        }

        encoded.append(",").append(KV_DELIMITER).append("auth").append("=").append("Bearer").append(" ").append(token).append(KV_DELIMITER);

        return new OAuth2InitialClientMessage(null, null, encoded.toArray());
    }

    public byte[] handleServerResponse(byte[] serverMessage) {
        // got a successful response
        if (serverMessage.length == 0) {
            return null;
        }

        // otherwise, server responded with a error message
        try {
            String errorMessage = ByteIterator.ofBytes(serverMessage).asUtf8String().base64Decode().asUtf8String().drainToString();
            log.debugf("Got error message from server [%s].", errorMessage);
        } catch (Exception e) {
            log.errorf(e, "Server returned an unexpected message that is probably an error but could not be parsed.");
        }

        // send a last message to abort the authentication
        return new ByteStringBuilder().append(KV_DELIMITER).toArray();
    }
}