Example usage for java.security DigestOutputStream DigestOutputStream

Introduction

In this page you can find the example usage for java.security DigestOutputStream DigestOutputStream.

Prototype

public DigestOutputStream(OutputStream stream, MessageDigest digest) 

Source Link

Document

Creates a digest output stream, using the specified output stream and message digest.

Usage

From source file:org.apache.taverna.prov.Saver.java

private Path writeIfLocal(List<ExternalReferenceSPI> externalReferences, Path file, String mimeType)
        throws IOException {

    ValueCarryingExternalReference<?> valRef = null;
    for (ExternalReferenceSPI ref : externalReferences) {
        if (ref instanceof ValueCarryingExternalReference) {
            valRef = (ValueCarryingExternalReference<?>) ref;
            break;
        }//www  .ja  v  a 2s . c om
    }

    if (valRef == null) {
        return null;
    }

    String fileExtension;
    try {
        fileExtension = MimeTypes.getDefaultMimeTypes().forName(mimeType).getExtension();
    } catch (MimeTypeException e1) {
        fileExtension = "";
    }
    Path targetFile = file.resolveSibling(file.getFileName() + fileExtension);

    MessageDigest sha = null;
    MessageDigest sha512 = null;
    OutputStream output = Files.newOutputStream(targetFile);
    try {
        try {
            sha = MessageDigest.getInstance("SHA");
            output = new DigestOutputStream(output, sha);

            sha512 = MessageDigest.getInstance("SHA-512");
            output = new DigestOutputStream(output, sha512);
        } catch (NoSuchAlgorithmException e) {
            logger.info("Could not find digest", e);
        }

        IOUtils.copyLarge(valRef.openStream(getContext()), output);
    } finally {
        output.close();
    }

    if (sha != null) {
        getSha1sums().put(targetFile.toRealPath(), hexOfDigest(sha));
    }
    if (sha512 != null) {
        sha512.digest();
        getSha512sums().put(targetFile.toRealPath(), hexOfDigest(sha512));
    }

    return targetFile;
}

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From source file:org.archive.wayback.util.FileDownloader.java

private void download(URL url, File target, boolean gz) throws IOException, NoSuchAlgorithmException {

    OutputStream os;/*from  w  ww.j a  v  a  2  s.  c  o m*/
    MessageDigest digester = null;
    InputStream is;
    if (gz) {
        is = new GZIPInputStream(url.openStream());
    } else {
        is = url.openStream();
    }

    FileOutputStream fos = new FileOutputStream(target);
    BufferedOutputStream bos = new BufferedOutputStream(fos);
    if (digest) {
        digester = MessageDigest.getInstance("MD5");
        os = new DigestOutputStream(bos, digester);
    } else {
        os = bos;
    }
    int BUF_SIZE = 4096;
    byte[] buffer = new byte[BUF_SIZE];
    for (int r = -1; (r = is.read(buffer, 0, BUF_SIZE)) != -1;) {
        os.write(buffer, 0, r);
    }
    is.close();
    os.flush();
    os.close();
    if (digest) {
        this.lastDigest = new String(Hex.encodeHex(digester.digest()));
    }
}

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From source file:org.ardverk.dropwizard.assets.AssetsDirectory.java

/**
 * Loads an {@link Entry} from the underlying filesystem.
 *//* ww  w  . j  a v  a  2  s .  c  om*/
private Entry load(String requestURI) throws IOException {
    Path file = getFilePath(requestURI);

    try {
        MessageDigest md = MessageDigest.getInstance("MD5");
        try (DigestOutputStream dos = new DigestOutputStream(NopOutputStream.NULL, md)) {
            Files.copy(file, dos);
        }

        FileTime lastModified = Files.getLastModifiedTime(file);
        String etag = "\"" + Hex.encodeHexString(md.digest()) + "\"";
        Entry entry = new Entry(file, lastModified, etag);

        if (USE_CACHE) {
            synchronized (cache) {
                cache.put(requestURI, entry);
            }
        }

        return entry;
    } catch (NoSuchAlgorithmException err) {
        throw new IOException("NoSuchAlgorithmException", err);
    }
}

---

From source file:org.dataconservancy.dcs.lineage.http.support.RequestUtil.java

/**
 * Calculates a MD5 digest over the list of entity ids, suitable for use as an
 * ETag.  If the list is empty, {@code null} is returned.
 *
 * @param entityIds the entities//from   w w w. j av a  2  s .  c  om
 * @return the MD5 digest, or {@code null} if {@code entityIds} is empty.
 */
public static String calculateDigest(List<String> entityIds) {
    if (entityIds.isEmpty()) {
        return null;
    }

    NullOutputStream nullOut = new NullOutputStream();
    DigestOutputStream digestOut = null;

    try {
        digestOut = new DigestOutputStream(nullOut, MessageDigest.getInstance("MD5"));
        for (String id : entityIds) {
            IOUtils.write(id, digestOut);
        }
        digestOut.close();
    } catch (IOException e) {
        throw new RuntimeException(e.getMessage(), e);
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e.getMessage(), e);
    }

    return digestToHexString(digestOut.getMessageDigest().digest());
}

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From source file:org.dataconservancy.dcs.util.http.ETagCalculator.java

public static String calculate(String id) {
    if (id.isEmpty()) {
        return null;
    }/* ww  w .  j a  v  a 2s.  co  m*/

    NullOutputStream nullOut = new NullOutputStream();
    DigestOutputStream digestOut = null;

    try {
        digestOut = new DigestOutputStream(nullOut, MessageDigest.getInstance("MD5"));
        IOUtils.write(id, digestOut);
        digestOut.close();
    } catch (IOException e) {
        throw new RuntimeException(e.getMessage(), e);
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e.getMessage(), e);
    }

    return digestToHexString(digestOut.getMessageDigest().digest());
}

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From source file:org.exist.mongodb.xquery.gridfs.Store.java

void writeCompressed(GridFSInputFile gfsFile, StopWatch stopWatch, Item content, int dataType)
        throws NoSuchAlgorithmException, IOException, XPathException {
    // Store data compressed, add statistics
    try (OutputStream stream = gfsFile.getOutputStream()) {
        MessageDigest md = MessageDigest.getInstance("MD5");
        CountingOutputStream cosGZ = new CountingOutputStream(stream);
        GZIPOutputStream gos = new GZIPOutputStream(cosGZ);
        DigestOutputStream dos = new DigestOutputStream(gos, md);
        CountingOutputStream cosRaw = new CountingOutputStream(dos);

        stopWatch.start();/* w ww .j a  v  a2s.c  om*/
        ContentSerializer.serialize(content, context, cosRaw);
        cosRaw.flush();
        cosRaw.close();
        stopWatch.stop();

        long nrBytesRaw = cosRaw.getByteCount();
        long nrBytesGZ = cosGZ.getByteCount();
        String checksum = Hex.encodeHexString(dos.getMessageDigest().digest());

        BasicDBObject info = new BasicDBObject();
        info.put(Constants.EXIST_COMPRESSION, GZIP);
        info.put(Constants.EXIST_ORIGINAL_SIZE, nrBytesRaw);
        info.put(Constants.EXIST_ORIGINAL_MD5, checksum);
        info.put(Constants.EXIST_DATATYPE, dataType);
        info.put(Constants.EXIST_DATATYPE_TEXT, Type.getTypeName(dataType));

        gfsFile.setMetaData(info);

        LOG.info("original_md5:" + checksum);
        LOG.info("compression ratio:" + ((100l * nrBytesGZ) / nrBytesRaw));

    }
}

---

From source file:org.fejoa.library.crypto.KDFParameters.java

public HashValue hash(MessageDigest messageDigest) {
    OutputStream outputStream = new DigestOutputStream(new OutputStream() {
        @Override//from w ww.  j  ava2  s .c  om
        public void write(int i) throws IOException {

        }
    }, messageDigest);

    try {
        outputStream.write(kdfSettings.hash(messageDigest).getBytes());
        outputStream.write(kdfSalt);
        outputStream.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return new HashValue(messageDigest.digest());
}

---

From source file:org.fejoa.library.crypto.UserKeyParameters.java

public HashValue hash(MessageDigest messageDigest) {
    OutputStream outputStream = new DigestOutputStream(new OutputStream() {
        @Override/* w  w  w.ja  va  2  s  . c om*/
        public void write(int i) throws IOException {

        }
    }, messageDigest);

    try {
        outputStream.write(kdfParameters.hash(messageDigest).getBytes());
        outputStream.write(userKeySalt);
        outputStream.write(hashAlgo.getBytes());
        outputStream.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return new HashValue(messageDigest.digest());
}

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From source file:org.geogit.storage.AbstractObjectDatabase.java

/**
 * @see org.geogit.storage.ObjectDatabase#put(org.geogit.storage.ObjectWriter)
 *///w ww  .jav  a2 s.  c o m
@Override
public final <T> ObjectId put(final ObjectWriter<T> writer) throws Exception {
    MessageDigest sha1;
    sha1 = MessageDigest.getInstance("SHA1");

    ByteArrayOutputStream rawOut = new ByteArrayOutputStream();

    DigestOutputStream keyGenOut = new DigestOutputStream(rawOut, sha1);
    // GZIPOutputStream cOut = new GZIPOutputStream(keyGenOut);
    LZFOutputStream cOut = new LZFOutputStream(keyGenOut);

    try {
        writer.write(cOut);
    } finally {
        // cOut.finish();
        cOut.flush();
        cOut.close();
        keyGenOut.flush();
        keyGenOut.close();
        rawOut.flush();
        rawOut.close();
    }

    final byte[] rawData = rawOut.toByteArray();
    final byte[] rawKey = keyGenOut.getMessageDigest().digest();
    final ObjectId id = new ObjectId(rawKey);
    putInternal(id, rawData, false);
    return id;
}

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From source file:org.hibernate.search.elasticsearch.aws.impl.AWSPayloadHashingRequestInterceptor.java

private String computeContentHash(HttpRequest request) throws IOException {
    HttpEntity entity = getEntity(request);
    if (entity == null) {
        return DigestUtils.sha256Hex("");
    }/*w w  w  .j a v  a2 s  .  c  o m*/
    if (!entity.isRepeatable()) {
        throw new IllegalStateException("Cannot sign AWS requests with non-repeatable entities");
    }

    final MessageDigest digest = getSha256Digest();
    DigestOutputStream digestStream = new DigestOutputStream(DISCARDING_STREAM, digest);
    entity.writeTo(digestStream);
    return Hex.encodeHexString(digest.digest());
}

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