Example usage for java.security DigestInputStream close

Introduction

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

Prototype

public void close() throws IOException 

Source Link

Document

Closes this input stream and releases any system resources associated with the stream.

Usage

From source file:Main.java

private static String computeHash(InputStream dataStream) throws IOException, NoSuchAlgorithmException {
    MessageDigest messageDigest = null;
    DigestInputStream digestInputStream = null;
    try {//from w w w  . ja va  2s  . c om
        messageDigest = MessageDigest.getInstance("SHA-256");
        digestInputStream = new DigestInputStream(dataStream, messageDigest);
        byte[] byteBuffer = new byte[1024 * 8];
        while (digestInputStream.read(byteBuffer) != -1)
            ;
    } finally {
        try {
            if (digestInputStream != null)
                digestInputStream.close();
            if (dataStream != null)
                dataStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    byte[] hash = messageDigest.digest();
    return String.format("%064x", new java.math.BigInteger(1, hash));
}

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From source file:at.alladin.rmbt.client.v2.task.HttpProxyTask.java

/**
 * //from w  w  w .j a  v  a  2  s  .  c om
 * @param file
 * @return
 * @throws NoSuchAlgorithmException
 * @throws IOException 
 */
public static String generateChecksum(File file) throws NoSuchAlgorithmException, IOException {
    MessageDigest md = MessageDigest.getInstance("MD5");
    DigestInputStream dis = new DigestInputStream(new FileInputStream(file), md);
    int ch;
    while ((ch = dis.read()) != -1) {
        //empty block
    }
    dis.close();
    return generateChecksumFromDigest(md.digest());
}

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From source file:de.uzk.hki.da.pkg.MetsConsistencyChecker.java

/**
 * Calculate hash./*from  w  w  w .  jav  a 2s.c  o m*/
 *
 * @param algorithm the algorithm
 * @param file the file
 * @return the string
 * @throws Exception the exception
 */
private static String calculateHash(MessageDigest algorithm, File file) throws Exception {

    FileInputStream fis = new FileInputStream(file);
    BufferedInputStream bis = new BufferedInputStream(fis);
    DigestInputStream dis = new DigestInputStream(bis, algorithm);

    // read the file and update the hash calculation
    while (dis.read() != -1)
        ;

    // get the hash value as byte array
    byte[] hash = algorithm.digest();

    fis.close();
    bis.close();
    dis.close();

    return byteArray2Hex(hash);

}

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From source file:com.clustercontrol.repository.factory.AgentLibDownloader.java

/**
 * MD5??//from  w  ww .  j a  va  2  s .c  o  m
 * @param filepath
 * @return
 * @throws HinemosUnknown 
 */
private static String getMD5(String filepath) throws HinemosUnknown {
    MessageDigest md = null;
    DigestInputStream inStream = null;
    byte[] digest = null;
    try {
        md = MessageDigest.getInstance("MD5");
        inStream = new DigestInputStream(new BufferedInputStream(new FileInputStream(filepath)), md);
        while (inStream.read() != -1) {
        }
        digest = md.digest();
    } catch (Exception e) {
        m_log.warn("getMD5() : filepath=" + filepath + ", " + e.getClass(), e);
    } finally {
        if (inStream != null) {
            try {
                inStream.close();
            } catch (Exception e) {
                m_log.warn("getMD5() : close " + e.getClass(), e);
            }
        }
        if (digest == null)
            throw new HinemosUnknown("MD5 digest is null");
    }
    return hashByte2MD5(digest);
}

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

/**
 * //from  w  ww.  ja  v a  2 s. co  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);
}

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From source file:hudson.Util.java

/**
 * Computes MD5 digest of the given input stream.
 *
 * @param source//from  w  ww.jav 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");

        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:Main.java

public static String md5(InputStream in) {
    int bufferSize = 256 * 1024;
    DigestInputStream digestInputStream = null;
    try {/*from w w w  . j a v a2  s . c o m*/
        MessageDigest messageDigest = MessageDigest.getInstance("MD5");
        digestInputStream = new DigestInputStream(in, messageDigest);
        byte[] buffer = new byte[bufferSize];
        while (digestInputStream.read(buffer) > 0)
            ;
        messageDigest = digestInputStream.getMessageDigest();
        byte[] resultByteArray = messageDigest.digest();
        char[] hexDigits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
        char[] resultCharArray = new char[resultByteArray.length * 2];
        int index = 0;
        for (byte b : resultByteArray) {
            resultCharArray[index++] = hexDigits[b >>> 4 & 0xf];
            resultCharArray[index++] = hexDigits[b & 0xf];
        }
        return new String(resultCharArray);
    } catch (NoSuchAlgorithmException e) {
        return null;
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            if (digestInputStream != null)
                digestInputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    return null;
}

---

From source file:Main.java

public static String encode(InputStream in) {
    int bufferSize = 256 * 1024;
    DigestInputStream digestInputStream = null;
    try {/*w w  w. ja v  a2  s.  c  o m*/
        MessageDigest messageDigest = MessageDigest.getInstance("MD5");
        digestInputStream = new DigestInputStream(in, messageDigest);
        byte[] buffer = new byte[bufferSize];
        while (digestInputStream.read(buffer) > 0)
            ;
        messageDigest = digestInputStream.getMessageDigest();
        byte[] resultByteArray = messageDigest.digest();
        char[] hexDigits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
        char[] resultCharArray = new char[resultByteArray.length * 2];
        int index = 0;
        for (byte b : resultByteArray) {
            resultCharArray[index++] = hexDigits[b >>> 4 & 0xf];
            resultCharArray[index++] = hexDigits[b & 0xf];
        }
        return new String(resultCharArray);
    } catch (NoSuchAlgorithmException e) {
        return null;
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            if (digestInputStream != null)
                digestInputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    return null;
}

---

From source file:hudson.Util.java

/**
 * Computes MD5 digest of the given input stream.
 *
 * @param source//from w ww .  j  a v a2 s.c o  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:com.aurel.track.dbase.HandleHome.java

public static String computeHash(File file) {
    try {//  w  w  w  .ja  v  a 2s . c o m
        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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