no.digipost.api.representations.Dokumentpakke.java Source code

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Here is the source code for no.digipost.api.representations.Dokumentpakke.java

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/**
 * Copyright (C) Posten Norge AS
 *
 * 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 no.digipost.api.representations;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.DigestOutputStream;
import java.security.MessageDigest;

import javax.activation.DataSource;

import org.apache.commons.io.IOUtils;
import org.bouncycastle.jcajce.provider.digest.SHA256;

public class Dokumentpakke implements DataSource {

    private final InputStream asicStream;
    private byte[] asicBytes;
    public static final String CONTENT_TYPE_KRYPTERT_DOKUMENTPAKKE = "application/cms";

    public Dokumentpakke(final InputStream asicStream) {
        this.asicStream = asicStream;
        asicBytes = null;
    }

    public Dokumentpakke(final byte[] asicBytes) {
        this.asicBytes = asicBytes;
        asicStream = new ByteArrayInputStream(asicBytes);
    }

    public byte[] getSHA256() throws IOException {
        MessageDigest digest = getDigest();
        if (asicBytes != null) {
            return digest.digest(asicBytes);
        }
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        DigestOutputStream digestStream = null;
        try {
            digestStream = new DigestOutputStream(baos, digest);
            IOUtils.copy(asicStream, digestStream);
        } finally {
            IOUtils.closeQuietly(digestStream);
        }
        asicBytes = baos.toByteArray();
        return digest.digest();
    }

    protected MessageDigest getDigest() {
        return new SHA256.Digest();
    }

    @Override
    public String getContentType() {
        return Dokumentpakke.CONTENT_TYPE_KRYPTERT_DOKUMENTPAKKE;
    }

    @Override
    public InputStream getInputStream() throws IOException {
        if (asicBytes != null) {
            return new ByteArrayInputStream(asicBytes);
        }
        return asicStream;
    }

    @Override
    public String getName() {
        return "asic.cms";
    }

    @Override
    public OutputStream getOutputStream() throws IOException {
        throw new UnsupportedOperationException("Not supported by handler");
    }
}