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The jose.4.j library is a robust and easy to use open source implementation of JSON Web Token (JWT) and the JOSE specification suite (JWS, JWE, and JWK). It is written in Java and relies solely on the JCA APIs for cryptography. Please see https://bitbucket.org/b_c/jose4j/wiki/Home for more info, examples, etc..
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/*
 * 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.jwa;

import org.jose4j.jwe.*;
import org.jose4j.jws.*;
import org.jose4j.jwx.HeaderParameterNames;
import org.jose4j.zip.CompressionAlgorithm;
import org.jose4j.zip.DeflateRFC1951CompressionAlgorithm;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.security.Security;
import java.util.Arrays;

/**
 */
public class AlgorithmFactoryFactory
{
    private static final Logger log = LoggerFactory.getLogger(AlgorithmFactoryFactory.class);

    private static final AlgorithmFactoryFactory factoryFactory = new AlgorithmFactoryFactory();

    private AlgorithmFactory jwsAlgorithmFactory;
    private AlgorithmFactory jweKeyMgmtModeAlgorithmFactory;
    private AlgorithmFactory jweContentEncryptionAlgorithmFactory;
    private AlgorithmFactory compressionAlgorithmFactory;

    private AlgorithmFactoryFactory()
    {
        initialize();
    }

    void reinitialize()
    {
        log.debug("Reinitializing jose4j...");
        initialize();
    }

    private void initialize()
    {
        String version = System.getProperty("java.version");
        String vendor = System.getProperty("java.vendor");
        String home = System.getProperty("java.home");
        String providers = Arrays.toString(Security.getProviders());
        log.debug("Initializing jose4j (running with Java {} from {} at {} with {} security providers installed)...", version, vendor, home, providers);
        long startTime = System.currentTimeMillis();
        jwsAlgorithmFactory = new AlgorithmFactory<>(HeaderParameterNames.ALGORITHM, JsonWebSignatureAlgorithm.class);
        jwsAlgorithmFactory.registerAlgorithm(new PlaintextNoneAlgorithm());
        jwsAlgorithmFactory.registerAlgorithm(new HmacUsingShaAlgorithm.HmacSha256());
        jwsAlgorithmFactory.registerAlgorithm(new HmacUsingShaAlgorithm.HmacSha384());
        jwsAlgorithmFactory.registerAlgorithm(new HmacUsingShaAlgorithm.HmacSha512());
        jwsAlgorithmFactory.registerAlgorithm(new EcdsaUsingShaAlgorithm.EcdsaP256UsingSha256());
        jwsAlgorithmFactory.registerAlgorithm(new EcdsaUsingShaAlgorithm.EcdsaP384UsingSha384());
        jwsAlgorithmFactory.registerAlgorithm(new EcdsaUsingShaAlgorithm.EcdsaP521UsingSha512());
        jwsAlgorithmFactory.registerAlgorithm(new RsaUsingShaAlgorithm.RsaSha256());
        jwsAlgorithmFactory.registerAlgorithm(new RsaUsingShaAlgorithm.RsaSha384());
        jwsAlgorithmFactory.registerAlgorithm(new RsaUsingShaAlgorithm.RsaSha512());
        jwsAlgorithmFactory.registerAlgorithm(new RsaUsingShaAlgorithm.RsaPssSha256());
        jwsAlgorithmFactory.registerAlgorithm(new RsaUsingShaAlgorithm.RsaPssSha384());
        jwsAlgorithmFactory.registerAlgorithm(new RsaUsingShaAlgorithm.RsaPssSha512());

        log.debug("JWS signature algorithms: {}", jwsAlgorithmFactory.getSupportedAlgorithms());

        jweKeyMgmtModeAlgorithmFactory = new AlgorithmFactory<>(HeaderParameterNames.ALGORITHM, KeyManagementAlgorithm.class);
        jweKeyMgmtModeAlgorithmFactory.registerAlgorithm(new RsaKeyManagementAlgorithm.Rsa1_5());
        jweKeyMgmtModeAlgorithmFactory.registerAlgorithm(new RsaKeyManagementAlgorithm.RsaOaep());
        jweKeyMgmtModeAlgorithmFactory.registerAlgorithm(new RsaKeyManagementAlgorithm.RsaOaep256());
        jweKeyMgmtModeAlgorithmFactory.registerAlgorithm(new DirectKeyManagementAlgorithm());
        jweKeyMgmtModeAlgorithmFactory.registerAlgorithm(new AesKeyWrapManagementAlgorithm.Aes128());
        jweKeyMgmtModeAlgorithmFactory.registerAlgorithm(new AesKeyWrapManagementAlgorithm.Aes192());
        jweKeyMgmtModeAlgorithmFactory.registerAlgorithm(new AesKeyWrapManagementAlgorithm.Aes256());
        jweKeyMgmtModeAlgorithmFactory.registerAlgorithm(new EcdhKeyAgreementAlgorithm());
        jweKeyMgmtModeAlgorithmFactory.registerAlgorithm(new EcdhKeyAgreementWithAesKeyWrapAlgorithm.EcdhKeyAgreementWithAes128KeyWrapAlgorithm());
        jweKeyMgmtModeAlgorithmFactory.registerAlgorithm(new EcdhKeyAgreementWithAesKeyWrapAlgorithm.EcdhKeyAgreementWithAes192KeyWrapAlgorithm());
        jweKeyMgmtModeAlgorithmFactory.registerAlgorithm(new EcdhKeyAgreementWithAesKeyWrapAlgorithm.EcdhKeyAgreementWithAes256KeyWrapAlgorithm());
        jweKeyMgmtModeAlgorithmFactory.registerAlgorithm(new Pbes2HmacShaWithAesKeyWrapAlgorithm.HmacSha256Aes128());
        jweKeyMgmtModeAlgorithmFactory.registerAlgorithm(new Pbes2HmacShaWithAesKeyWrapAlgorithm.HmacSha384Aes192());
        jweKeyMgmtModeAlgorithmFactory.registerAlgorithm(new Pbes2HmacShaWithAesKeyWrapAlgorithm.HmacSha512Aes256());
        jweKeyMgmtModeAlgorithmFactory.registerAlgorithm(new AesGcmKeyEncryptionAlgorithm.Aes128Gcm());
        jweKeyMgmtModeAlgorithmFactory.registerAlgorithm(new AesGcmKeyEncryptionAlgorithm.Aes192Gcm());
        jweKeyMgmtModeAlgorithmFactory.registerAlgorithm(new AesGcmKeyEncryptionAlgorithm.Aes256Gcm());

        log.debug("JWE key management algorithms: {}", jweKeyMgmtModeAlgorithmFactory.getSupportedAlgorithms());

        jweContentEncryptionAlgorithmFactory = new AlgorithmFactory<>(HeaderParameterNames.ENCRYPTION_METHOD, ContentEncryptionAlgorithm.class);
        jweContentEncryptionAlgorithmFactory.registerAlgorithm(new AesCbcHmacSha2ContentEncryptionAlgorithm.Aes128CbcHmacSha256());
        jweContentEncryptionAlgorithmFactory.registerAlgorithm(new AesCbcHmacSha2ContentEncryptionAlgorithm.Aes192CbcHmacSha384());
        jweContentEncryptionAlgorithmFactory.registerAlgorithm(new AesCbcHmacSha2ContentEncryptionAlgorithm.Aes256CbcHmacSha512());
        jweContentEncryptionAlgorithmFactory.registerAlgorithm(new AesGcmContentEncryptionAlgorithm.Aes128Gcm());
        jweContentEncryptionAlgorithmFactory.registerAlgorithm(new AesGcmContentEncryptionAlgorithm.Aes192Gcm());
        jweContentEncryptionAlgorithmFactory.registerAlgorithm(new AesGcmContentEncryptionAlgorithm.Aes256Gcm());

        log.debug("JWE content encryption algorithms: {}", jweContentEncryptionAlgorithmFactory.getSupportedAlgorithms());

        compressionAlgorithmFactory = new AlgorithmFactory<>(HeaderParameterNames.ZIP, CompressionAlgorithm.class);
        compressionAlgorithmFactory.registerAlgorithm(new DeflateRFC1951CompressionAlgorithm());

        log.debug("JWE compression algorithms: {}", compressionAlgorithmFactory.getSupportedAlgorithms());
        log.debug("Initialized jose4j in {}ms", (System.currentTimeMillis() - startTime));
    }

    public static AlgorithmFactoryFactory getInstance()
    {
        return factoryFactory;
    }

    public AlgorithmFactory getJwsAlgorithmFactory()
    {
        return jwsAlgorithmFactory;
    }

    public AlgorithmFactory getJweKeyManagementAlgorithmFactory()
    {
        return jweKeyMgmtModeAlgorithmFactory;
    }

    public AlgorithmFactory getJweContentEncryptionAlgorithmFactory()
    {
        return jweContentEncryptionAlgorithmFactory;
    }

    public AlgorithmFactory getCompressionAlgorithmFactory()
    {
        return compressionAlgorithmFactory;
    }
}