Example usage for java.security DigestInputStream DigestInputStream

Introduction

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

Prototype

public DigestInputStream(InputStream stream, MessageDigest digest) 

Source Link

Document

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

Usage

From source file:org.jahia.services.modulemanager.persistence.PersistentBundleInfoBuilder.java

private static DigestInputStream toDigestInputStream(InputStream is) {
    try {/* w w  w .  j  a va2s.  c  o  m*/
        return new DigestInputStream(is, MessageDigest.getInstance("MD5"));
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e);
    }
}

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From source file:org.apache.nifi.scripting.ScriptFactory.java

private byte[] getMD5Hash(String aScriptFileName) throws FileNotFoundException, IOException {
    byte[] messageDigest = null;
    try (FileInputStream fis = new FileInputStream(aScriptFileName);
            DigestInputStream dis = new DigestInputStream(new BufferedInputStream(fis),
                    MessageDigest.getInstance("MD5"))) {

        byte[] bytes = new byte[8192];
        while (dis.read(bytes) != -1) {
            // do nothing...just computing the md5 hash
        }/*from  www  . j av  a2 s.  co m*/
        messageDigest = dis.getMessageDigest().digest();
    } catch (NoSuchAlgorithmException swallow) {
        // MD5 is a legitimate format
    }
    return messageDigest;
}

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From source file:org.guvnor.ala.build.maven.util.RepositoryVisitor.java

private void makeTempFile(final File parent, final Path path) throws IOException, NoSuchAlgorithmException {

    final int BUFFER = 2048; //Dangerous stuff here ???
    byte data[] = new byte[BUFFER];

    MessageDigest md = MessageDigest.getInstance("MD5");
    DigestInputStream dis = new DigestInputStream(Files.newInputStream(path), md);
    try (BufferedInputStream origin = new BufferedInputStream(dis, BUFFER)) {
        String resourcePath = path.toString();
        readFile(origin, data, BUFFER);//  ww  w .j  a v a 2s . c o  m
        identityHash.put(resourcePath, getMD5String(dis.getMessageDigest().digest()));
    }

    FileOutputStream output = null;
    dis = new DigestInputStream(Files.newInputStream(path), md);
    try (BufferedInputStream origin = new BufferedInputStream(dis, BUFFER)) {
        String resourcePath = path.toString();
        if (oldIdentityHash != null) {
            //if the key exist in the old map and the hash is different then we need to override the file
            if (oldIdentityHash.containsKey(resourcePath) && oldIdentityHash.get(resourcePath) != null
                    && !oldIdentityHash.get(resourcePath).equals(identityHash.get(resourcePath))) {

                output = writeFile(parent, path, output, origin, data, BUFFER);
                System.out.println("Overriding existing file content : " + resourcePath);
            } else if (!oldIdentityHash.containsKey(resourcePath)) {

                output = writeFile(parent, path, output, origin, data, BUFFER);
            }
        } else {
            output = writeFile(parent, path, output, origin, data, BUFFER);
        }
    } finally {
        if (output != null) {
            output.close();
        }
    }

}

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From source file:iDynoOptimizer.MOEAFramework26.src.org.moeaframework.util.io.FileProtection.java

/**
 * Returns an {@link InputStream} for reading from the specified file and
 * performs validation on the file when the {@code close} method is invoked
 * on the stream.// w ww  .  j a  v a  2s. c  o m
 * 
 * @param file the file to the opened and validated
 * @return an {@code InputStream} for reading from the specified file
 * @throws FileNotFoundException if the specified file does not exist
 */
public static InputStream openInputStream(final File file) throws FileNotFoundException {
    return new DigestInputStream(new FileInputStream(file), createMessageDigest()) {

        @Override
        public void close() throws IOException {
            //finish reading the file contents
            byte[] buffer = new byte[Settings.BUFFER_SIZE];

            while (read(buffer) != -1) {
                //reading the data calculates the checksum, nothing else to
                //do here
            }

            super.close();

            //check digest
            validate(file, getMessageDigest().digest());
        }

    };
}

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From source file:com.netflix.hollow.example.consumer.infrastructure.S3BlobRetriever.java

private File downloadFile(String objectName) throws IOException {
    for (int retryCount = 0; retryCount < 3; retryCount++) {
        try {// www .jav  a  2 s  .com
            File tempFile = new File(System.getProperty("java.io.tmpdir"), objectName.replace('/', '-'));

            S3Object s3Object = s3.getObject(bucketName, objectName);

            MessageDigest md = MessageDigest.getInstance("MD5");
            try (InputStream is = new DigestInputStream(s3Object.getObjectContent(), md);
                    OutputStream os = new FileOutputStream(tempFile)) {
                IOUtils.copy(is, os);
            }

            String expectedMD5 = s3Object.getObjectMetadata().getETag();
            String actualMD5 = Base16Lower.encodeAsString(md.digest());

            if (!actualMD5.equals(expectedMD5))
                throw new IOException("MD5 sum did not match expected!");

            return tempFile;
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    throw new IOException("Unable to successfully retrieve stream from S3 after 3 retries");
}

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From source file:org.eclipse.jgit.lfs.server.fs.LfsServerTest.java

protected LongObjectId putContent(Path f) throws FileNotFoundException, IOException {
    try (CloseableHttpClient client = HttpClientBuilder.create().build()) {
        LongObjectId id1, id2;/*w w w.  jav a  2  s  .c  om*/
        String hexId1, hexId2;
        try (DigestInputStream in = new DigestInputStream(new BufferedInputStream(Files.newInputStream(f)),
                Constants.newMessageDigest())) {
            InputStreamEntity entity = new InputStreamEntity(in, Files.size(f),
                    ContentType.APPLICATION_OCTET_STREAM);
            id1 = LongObjectIdTestUtils.hash(f);
            hexId1 = id1.name();
            HttpPut request = new HttpPut(server.getURI() + "/lfs/objects/" + hexId1);
            request.setEntity(entity);
            HttpResponse response = client.execute(request);
            checkResponseStatus(response);
            id2 = LongObjectId.fromRaw(in.getMessageDigest().digest());
            hexId2 = id2.name();
            assertEquals(hexId1, hexId2);
        }
        return id1;
    }
}

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From source file:org.opencastproject.remotetest.util.Utils.java

public static final String md5(File f) throws IOException {
    byte[] bytes = new byte[1024];
    InputStream is = null;/*w ww.  j a va 2 s  .co  m*/
    try {
        MessageDigest md = MessageDigest.getInstance("MD5");
        is = new DigestInputStream(new FileInputStream(f), md);
        while ((is.read(bytes)) >= 0) {
        }
        return hex(md.digest());
    } catch (NoSuchAlgorithmException e) {
        throw new IOException("No MD5 algorithm available");
    } finally {
        is.close();
    }
}

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From source file:info.magnolia.module.files.MD5CheckingFileExtractorOperation.java

protected DigestInputStream wrap(InputStream stream) {
    final MessageDigest md5 = getMessageDigest();
    return new DigestInputStream(stream, md5);
}

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From source file:org.openintents.safe.CryptoHelper.java

/**
 * @param message/*from   w ww  . j  a v  a  2  s  .co  m*/
 * @return MD5 digest of message in a byte array
 * @throws NoSuchAlgorithmException
 * @throws IOException
 */
public static byte[] md5String(String message) {

    byte[] input = message.getBytes();

    MessageDigest hash;
    ByteArrayInputStream bIn = null;
    DigestInputStream dIn = null;

    try {
        hash = MessageDigest.getInstance("MD5");

        bIn = new ByteArrayInputStream(input);
        dIn = new DigestInputStream(bIn, hash);

        for (int i = 0; i < input.length; i++) {
            dIn.read();
        }

    } catch (NoSuchAlgorithmException e) {
        Log.e(TAG, "md5String(): " + e.toString());
    } catch (IOException e) {
        Log.e(TAG, "md5String(): " + e.toString());
    }

    return dIn.getMessageDigest().digest();
}

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From source file:org.zanata.rest.client.FileResourceClientTest.java

private Pair<String, Long> calculateFileHashAndSize(InputStream in) {
    try (CountingInputStream countingStream = new CountingInputStream(in)) {
        MessageDigest md = MessageDigest.getInstance("MD5");
        try (InputStream digestInputStream = new DigestInputStream(countingStream, md)) {
            byte[] buffer = new byte[256];
            while (digestInputStream.read(buffer) > 0) {
                // continue
            }/*w  w  w  .  j ava 2 s . com*/
        }
        String hash = new String(Hex.encodeHex(md.digest()));
        return new ImmutablePair<>(hash, countingStream.getByteCount());
    } catch (NoSuchAlgorithmException | IOException e) {
        throw new RuntimeException(e);
    }
}

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