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/*******************************************************************************
 * Cloud Foundry
 * Copyright (c) [2009-2016] Pivotal Software, Inc. All Rights Reserved.
 * 
 * This product is licensed to you under the Apache License, Version 2.0 (the "License").
 * You may not use this product except in compliance with the License.
 * 
 * This product includes a number of subcomponents with
 * separate copyright notices and license terms. Your use of these
 * subcomponents is subject to the terms and conditions of the
 * subcomponent's license, as noted in the LICENSE file.
 *******************************************************************************/
package org.cloudfoundry.identity.uaa.oauth;

import org.cloudfoundry.identity.uaa.oauth.jwt.IdentifiedSigner;
import org.cloudfoundry.identity.uaa.oauth.jwt.Signer;
import org.springframework.security.jwt.crypto.sign.MacSigner;
import org.springframework.security.jwt.crypto.sign.RsaSigner;

public class CommonSigner implements Signer {

    private final Signer delegate;

    public CommonSigner(String keyId, String signingKey) {
        org.springframework.security.jwt.crypto.sign.Signer signer;
        if(KeyInfo.isAssymetricKey(signingKey)) {
            signer = new RsaSigner(signingKey);
        } else {
            signer = new MacSigner(signingKey);
        }
        delegate = new IdentifiedSigner(keyId, signer);
    }

    @Override
    public String keyId() {
        return delegate.keyId();
    }

    @Override
    public byte[] sign(byte[] bytes) {
        return delegate.sign(bytes);
    }

    @Override
    public String algorithm() {
        return delegate.algorithm();
    }
}