Example usage for java.security DigestInputStream read

Introduction

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

Prototype

public int read(byte b[]) throws IOException 

Source Link

Document

Reads up to b.length bytes of data from this input stream into an array of bytes.

Usage

From source file:org.springframework.integration.aws.core.AWSCommonUtils.java

/**
 * Generates the MD5 hash of the file provided
 * @param file/* w w  w.j  a v a2  s  .co m*/
 */
public static byte[] getContentsMD5AsBytes(File file) {

    DigestInputStream din = null;
    final byte[] digestToReturn;

    try {
        BufferedInputStream bin = new BufferedInputStream(new FileInputStream(file), 32768);
        din = new DigestInputStream(bin, MessageDigest.getInstance("MD5"));
        //Just to update the digest
        byte[] dummy = new byte[4096];
        for (int i = 1; i > 0; i = din.read(dummy))
            ;
        digestToReturn = din.getMessageDigest().digest();
    } catch (NoSuchAlgorithmException e) {
        throw new IllegalStateException("Caught Exception while generating a MessageDigest instance", e);
    } catch (FileNotFoundException e) {
        throw new IllegalStateException("File " + file.getName() + " not found", e);
    } catch (IOException e) {
        throw new IllegalStateException("Caught exception while reading from file", e);
    } finally {
        IOUtils.closeQuietly(din);
    }
    return digestToReturn;
}

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From source file:io.amient.yarn1.YarnClient.java

/**
 * Distribute all dependencies in a single jar both from Client to Master as well as Master to Container(s)
 *//*from ww  w .  j av  a 2s  .c  o  m*/
public static void distributeResources(Configuration yarnConf, Properties appConf, String appName)
        throws IOException {
    final FileSystem distFs = FileSystem.get(yarnConf);
    final FileSystem localFs = FileSystem.getLocal(yarnConf);
    try {

        //distribute configuration
        final Path dstConfig = new Path(distFs.getHomeDirectory(), appName + ".configuration");
        final FSDataOutputStream fs = distFs.create(dstConfig);
        appConf.store(fs, "Yarn1 Application Config for " + appName);
        fs.close();
        log.info("Updated resource " + dstConfig);

        //distribute main jar
        final String localPath = YarnClient.class.getProtectionDomain().getCodeSource().getLocation().getFile()
                .replace(".jar/", ".jar");
        final Path src;
        final String jarName = appName + ".jar";
        if (localPath.endsWith(".jar")) {
            log.info("Distributing local jar : " + localPath);
            src = new Path(localPath);
        } else {
            try {
                String localArchive = localPath + appName + ".jar";
                localFs.delete(new Path(localArchive), false);
                log.info("Unpacking compile scope dependencies: " + localPath);
                executeShell("mvn -f " + localPath + "/../.. generate-resources");
                log.info("Preparing application main jar " + localArchive);
                executeShell("jar cMf " + localArchive + " -C " + localPath + " ./");
                src = new Path(localArchive);

            } catch (InterruptedException e) {
                throw new IOException(e);
            }
        }

        byte[] digest;
        final MessageDigest md = MessageDigest.getInstance("MD5");
        try (InputStream is = new FileInputStream(src.toString())) {
            DigestInputStream dis = new DigestInputStream(is, md);
            byte[] buffer = new byte[8192];
            int numOfBytesRead;
            while ((numOfBytesRead = dis.read(buffer)) > 0) {
                md.update(buffer, 0, numOfBytesRead);
            }
            digest = md.digest();
        }
        log.info("Local check sum: " + Hex.encodeHexString(digest));

        final Path dst = new Path(distFs.getHomeDirectory(), jarName);
        Path remoteChecksumFile = new Path(distFs.getHomeDirectory(), jarName + ".md5");
        boolean checksumMatches = false;
        if (distFs.isFile(remoteChecksumFile)) {
            try (InputStream r = distFs.open(remoteChecksumFile)) {
                ByteArrayOutputStream buffer = new ByteArrayOutputStream();
                int nRead;
                byte[] data = new byte[1024];
                while ((nRead = r.read(data, 0, data.length)) != -1) {
                    buffer.write(data, 0, nRead);
                }
                buffer.flush();
                byte[] remoteDigest = buffer.toByteArray();
                log.info("Remote check sum: " + Hex.encodeHexString(remoteDigest));
                checksumMatches = Arrays.equals(digest, remoteDigest);

            }
        }
        if (!checksumMatches) {
            log.info("Updating resource " + dst + " ...");
            distFs.copyFromLocalFile(false, true, src, dst);
            try (FSDataOutputStream remoteChecksumStream = distFs.create(remoteChecksumFile)) {
                log.info("Updating checksum " + remoteChecksumFile + " ...");
                remoteChecksumStream.write(digest);
            }
            FileStatus scFileStatus = distFs.getFileStatus(dst);
            log.info("Updated resource " + dst + " " + scFileStatus.getLen());
        }
    } catch (NoSuchAlgorithmException e) {
        throw new IOException(e);
    }
}

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From source file:Manifest.java

/**
 * This convenience method is used by both create() and verify(). It reads
 * the contents of a named file and computes a message digest for it, using
 * the specified MessageDigest object.//www .j av  a2  s  . c  o m
 */
public static byte[] getFileDigest(String filename, MessageDigest md) throws IOException {
    // Make sure there is nothing left behind in the MessageDigest
    md.reset();

    // Create a stream to read from the file and compute the digest
    DigestInputStream in = new DigestInputStream(new FileInputStream(filename), md);

    // Read to the end of the file, discarding everything we read.
    // The DigestInputStream automatically passes all the bytes read to
    // the update() method of the MessageDigest
    while (in.read(buffer) != -1)
        /* do nothing */;

    // Finally, compute and return the digest value.
    return md.digest();
}

---

From source file:fr.gouv.culture.vitam.digest.DigestCompute.java

/**
 * // w  ww.  j a v a2s .c  o  m
 * @param fis
 * @param algorithm
 * @return the Hashcode according to the algorithm
 * @throws Exception
 */
public final static String getHashCode(FileInputStream fis, String algorithm) throws Exception {
    MessageDigest md = MessageDigest.getInstance(algorithm);
    DigestInputStream dis = null;
    try {
        dis = new DigestInputStream(fis, md);
        byte[] buffer = new byte[8192];
        while (dis.read(buffer) != -1)
            ;
    } finally {
        if (dis != null) {
            dis.close();
        }
    }
    byte[] bDigest = md.digest();
    return Base64.encode(bDigest, false);
}

---

From source file:hudson.Util.java

/**
 * Computes MD5 digest of the given input stream.
 *
 * @param source/*from   ww  w .j a  v  a2  s  .co m*/
 *      The stream will be closed by this method at the end of this method.
 * @return
 *      32-char wide string
 */
public static String getDigestOf(InputStream source) throws IOException {
    try {
        MessageDigest md5 = MessageDigest.getInstance("MD5");

        DigestInputStream in = new DigestInputStream(source, md5);
        try {
            while (in.read(garbage) > 0)
                ; // simply discard the input
        } finally {
            in.close();
        }
        return toHexString(md5.digest());
    } catch (NoSuchAlgorithmException e) {
        throw new IOException2("MD5 not installed", e); // impossible
    }
}

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From source file:me.lachlanap.summis.downloader.VerifierCallable.java

@Override
public Void call() throws Exception {
    Path file = binaryRoot.resolve(info.getName());
    MessageDigest md5 = MessageDigest.getInstance("MD5");
    MessageDigest sha1 = MessageDigest.getInstance("SHA-1");
    byte[] buffer = new byte[1024];
    try (final InputStream is = Files.newInputStream(file)) {
        DigestInputStream dis = new DigestInputStream(new DigestInputStream(is, md5), sha1);
        while (dis.read(buffer) != -1) {
            ;//from   w  w  w  .j  a v a 2 s  . com
        }
    }
    String md5Digest = new String(Hex.encodeHex(md5.digest()));
    String sha1Digest = new String(Hex.encodeHex(sha1.digest()));
    if (!md5Digest.equals(info.getMD5Digest()) || !sha1Digest.equals(info.getSHA1Digest()))
        throw new RuntimeException(info.getName() + " failed verification");
    downloadListener.completedAVerify();
    return null;
}

---

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

/**
 * Completely reads an InputStream and returns its MD5.
 * TODO : should we close it?//  ww  w .java2 s . c om
 */
protected String calculateMD5(InputStream stream) throws IOException {
    final DigestInputStream md5Stream = wrap(stream);
    byte[] buffer = new byte[1024];
    while (md5Stream.read(buffer) != -1) {
    }

    return retrieveMD5(md5Stream);
}

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From source file:hudson.Util.java

/**
 * Computes MD5 digest of the given input stream.
 *
 * @param source//w w w  . j a v  a  2  s  . co  m
 *      The stream will be closed by this method at the end of this method.
 * @return
 *      32-char wide string
 */
public static String getDigestOf(InputStream source) throws IOException {
    try {
        MessageDigest md5 = MessageDigest.getInstance("MD5");

        byte[] buffer = new byte[1024];
        DigestInputStream in = new DigestInputStream(source, md5);
        try {
            while (in.read(buffer) > 0)
                ; // simply discard the input
        } finally {
            in.close();
        }
        return toHexString(md5.digest());
    } catch (NoSuchAlgorithmException e) {
        throw new IOException2("MD5 not installed", e); // impossible
    }
}

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From source file:org.wso2.carbon.connector.amazons3.auth.AmazonS3ContentMD5Builder.java

/**
 * Consume the string type delete configuration and returns its Base-64 encoded MD5 checksum as a string.
 *
 * @param deleteConfig gets delete configuration as a string.
 * @return String type base-64 encoded MD5 checksum.
 * @throws IOException                    if an I/O error occurs when reading bytes of data from input stream.
 * @throws NoSuchAlgorithmException if no implementation for the specified algorithm.
 */// ww  w.  j av a2  s . c o m
private String getContentMD5Header(final String deleteConfig) throws IOException, NoSuchAlgorithmException {

    String contentHeader = null;
    // convert String into InputStream
    final InputStream inputStream = new ByteArrayInputStream(deleteConfig.getBytes(Charset.defaultCharset()));
    final DigestInputStream digestInputStream = new DigestInputStream(inputStream,
            MessageDigest.getInstance(AmazonS3Constants.MD5));

    final byte[] buffer = new byte[AmazonS3Constants.BUFFER_SIZE];
    while (digestInputStream.read(buffer) > 0) {
        contentHeader = new String(Base64.encodeBase64(digestInputStream.getMessageDigest().digest()),
                Charset.defaultCharset());
    }
    return contentHeader;
}

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From source file:com.aurel.track.dbase.HandleHome.java

public static String computeHash(File file) {
    try {//from www.  j av a  2 s  .  com
        MessageDigest md = MessageDigest.getInstance("MD5");

        InputStream is = new FileInputStream(file);
        byte[] buffer = new byte[4096]; // To hold file contents

        DigestInputStream dis = new DigestInputStream(is, md);
        while (dis.read(buffer) != -1) {

        }

        byte[] digest = md.digest();

        dis.close();

        String hash = DatatypeConverter.printHexBinary(digest);

        return hash;

    } catch (Exception e) {

    }
    return null;
}

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