ratpack.session.clientside.internal.DefaultSigner.java Source code

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Here is the source code for ratpack.session.clientside.internal.DefaultSigner.java

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/*
 * Copyright 2014 the original author or authors.
 *
 * 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 ratpack.session.clientside.internal;

import io.netty.buffer.ByteBuf;
import ratpack.session.clientside.Signer;
import ratpack.util.Exceptions;

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;

public class DefaultSigner implements Signer {

    private final SecretKeySpec secretKeySpec;

    public DefaultSigner(SecretKeySpec secretKeySpec) {
        this.secretKeySpec = secretKeySpec;
    }

    @Override
    public byte[] sign(ByteBuf message) {
        return Exceptions.uncheck(() -> {
            Mac mac = Mac.getInstance(secretKeySpec.getAlgorithm());
            mac.init(secretKeySpec);
            mac.update(message.nioBuffer());
            return mac.doFinal();
        });
    }

}