org.jose4j.jwk.VerificationJwkSelector 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 Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging 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: 35.0.0.Beta1

Show newest version

/*
 * Copyright 2012-2017 Brian Campbell
 *
 * 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.jose4j.jwk;

import org.jose4j.jws.EcdsaUsingShaAlgorithm;
import org.jose4j.jws.JsonWebSignature;
import org.jose4j.jws.JsonWebSignatureAlgorithm;
import org.jose4j.lang.JoseException;

import java.util.Collection;
import java.util.List;

/**
 *
 */
public class VerificationJwkSelector
{
    public JsonWebKey select(JsonWebSignature jws, Collection keys) throws JoseException
    {
        List jsonWebKeys = selectList(jws, keys);
        return jsonWebKeys.isEmpty() ? null : jsonWebKeys.get(0);
    }

    public List selectList(JsonWebSignature jws, Collection keys) throws JoseException
    {
        SimpleJwkFilter filter = SelectorSupport.filterForInboundSigned(jws);
        List filtered = filter.filter(keys);

        if (hasMoreThanOne(filtered))
        {
            filter.setAlg(jws.getAlgorithmHeaderValue(), SimpleJwkFilter.OMITTED_OKAY);
            filtered = filter.filter(filtered);
        }

        if (hasMoreThanOne(filtered) && EllipticCurveJsonWebKey.KEY_TYPE.equals(jws.getKeyType()))
        {
            JsonWebSignatureAlgorithm algorithm = jws.getAlgorithmNoConstraintCheck();
            EcdsaUsingShaAlgorithm ecdsaAlgorithm = (EcdsaUsingShaAlgorithm) algorithm;
            filter.setCrv(ecdsaAlgorithm.getCurveName(), SimpleJwkFilter.OMITTED_OKAY);
            filtered = filter.filter(filtered);
        }

        return filtered;

        // todo -> if >1, try even harder... maybe. But are there actually realistic cases where this will happen?
    }

    public JsonWebKey selectWithVerifySignatureDisambiguate(JsonWebSignature jws, Collection keys) throws JoseException
    {
        List jsonWebKeys = selectList(jws, keys);
        if (jsonWebKeys.isEmpty())
        {
            return null;
        }
        else if (jsonWebKeys.size() == 1)
        {
            return jsonWebKeys.get(0);
        }
        else
        {
            for (JsonWebKey jwk : jsonWebKeys)
            {
                jws.setKey(jwk.getKey());
                if (jws.verifySignature())
                {
                    return jwk;
                }
            }
        }
        return null;
    }

    private boolean hasMoreThanOne(List filtered)
    {
        return filtered.size() > 1;
    }
}