Example usage for java.security MessageDigest update

Introduction

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

Prototype

public void update(byte[] input, int offset, int len) 

Source Link

Document

Updates the digest using the specified array of bytes, starting at the specified offset.

Usage

From source file:com.networknt.utility.HashUtil.java

public static String md5(String input) {

    String md5 = null;/*from  w w  w.  j a va  2 s  .co  m*/

    if (null == input)
        return null;

    try {

        //Create MessageDigest object for MD5
        MessageDigest digest = MessageDigest.getInstance("MD5");

        //Update input string in message digest
        digest.update(input.getBytes(UTF_8), 0, input.length());

        //Converts message digest value in base 16 (hex)
        md5 = new BigInteger(1, digest.digest()).toString(16);

    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e);
    }
    return md5;
}

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From source file:Main.java

/**
 * Returns the lowercase string representation of the file's MD5 sum.
 *//*from   w w  w. j  a  va  2  s  .c  o m*/
public static String getMD5Sum(String file) throws IOException {
    try {
        MessageDigest digest = MessageDigest.getInstance("MD5");
        InputStream is = new FileInputStream(file);
        byte[] buffer = new byte[8192];
        int read = 0;
        while ((read = is.read(buffer)) > 0) {
            digest.update(buffer, 0, read);
        }
        is.close();
        byte[] md5sum = digest.digest();
        BigInteger bigInt = new BigInteger(1, md5sum);
        return bigInt.toString(16);
    } catch (NoSuchAlgorithmException e) {
        return "";
    }
}

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From source file:Main.java

public static byte[] getFileSHA1(String path) throws IOException {

    File file = new File(path);
    FileInputStream in = new FileInputStream(file);
    MessageDigest messagedigest;
    try {// www .  ja  v a  2s  .  c om
        messagedigest = MessageDigest.getInstance("SHA-1");

        byte[] buffer = new byte[1024 * 64];
        int len;

        while ((len = in.read(buffer)) > 0) {
            messagedigest.update(buffer, 0, len);
        }

        return messagedigest.digest();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (OutOfMemoryError e) {
        e.printStackTrace();
        throw e;
    } finally {
        in.close();
    }
    return null;
}

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From source file:Main.java

public static byte[] createMD5(FileInputStream is) throws IOException {
    MessageDigest digester = null;
    try {// w  w  w  .  j  a v a2s  .co m
        digester = MessageDigest.getInstance("MD5");
        byte[] buffer = new byte[16 * 1024]; // 16k
        int length = 0;
        while ((length = is.read(buffer)) > 0) {
            digester.update(buffer, 0, length);
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        is.close();
    }

    if (digester != null) {
        return digester.digest();
    }

    return null;
}

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From source file:Main.java

private static byte[] createChecksum(String filepath) throws IOException, NoSuchAlgorithmException {
    InputStream fileInputStream = new FileInputStream(filepath);

    byte[] buffer = new byte[1024];
    MessageDigest md5HashInstance = MessageDigest.getInstance("MD5");
    int numberOfBytesRead;

    do {//from w w w.  j  a v  a2s  .c  o m
        numberOfBytesRead = fileInputStream.read(buffer);
        if (numberOfBytesRead > 0) {
            md5HashInstance.update(buffer, 0, numberOfBytesRead);
        }
    } while (numberOfBytesRead != -1);

    fileInputStream.close();

    return md5HashInstance.digest();
}

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From source file:com.nunofacha.chestmaster.commands.ChestHashCommand.java

public static String getDigest(InputStream is, MessageDigest md, int byteArraySize) {

    try {/*from  w  ww  .java  2 s.co  m*/
        md.reset();
        byte[] bytes = new byte[byteArraySize];
        int numBytes;
        while ((numBytes = is.read(bytes)) != -1) {
            md.update(bytes, 0, numBytes);
        }
        byte[] digest = md.digest();
        String result = new String(Hex.encodeHex(digest));
        return result;
    } catch (IOException ex) {
        Logger.getLogger(ChestHashCommand.class.getName()).log(Level.SEVERE, null, ex);
    }
    return "Failed to get hash!";
}

---

From source file:Main.java

public static byte[] getSHA1hash(byte[] dataByte) {
    MessageDigest md = null;
    byte[] sha1hash = new byte[20];
    try {//w  ww.j  av  a  2 s .  com
        md = MessageDigest.getInstance("SHA-1");
        md.update(dataByte, 0, dataByte.length);
        sha1hash = md.digest();
        return sha1hash;
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
    }
    return null;
}

---

From source file:com.distimo.sdk.Utils.java

static String md5(String s) {
    if (Utils.DEBUG) {
        Log.i(TAG, "md5()");
    }//from   ww w . j  a  va  2 s  .  c om

    String result = "";

    MessageDigest m = null;
    try {
        m = MessageDigest.getInstance("MD5");
        m.update(s.getBytes(), 0, s.length());
        result = byteArrayToHexString(m.digest());
    } catch (final NoSuchAlgorithmException nsae) {
        if (Utils.DEBUG) {
            nsae.printStackTrace();
        }
    }

    return result;
}

---

From source file:Main.java

public static String getMD5EncryptedString(byte[] _encTarget) {
    String encTarget = "";
    try {/*from w  w  w .j a va2 s  .  com*/
        encTarget = new String(_encTarget, "UTF-8");
    } catch (UnsupportedEncodingException e1) {
        System.out.println("error converting byte[] to string");
    }
    MessageDigest mdEnc = null;
    try {
        mdEnc = MessageDigest.getInstance("MD5");
    } catch (NoSuchAlgorithmException e) {
        System.out.println("Exception while encrypting to md5");
    } // Encryption algorithm
    mdEnc.update(encTarget.getBytes(), 0, encTarget.length());
    String md5 = new BigInteger(1, mdEnc.digest()).toString(16);
    while (md5.length() < 32) {
        md5 = "0" + md5;
    }
    return md5;
}

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From source file:Main.java

public static byte[] calculateMd5(String filePath) throws IOException {
    try {//  w  ww.  j  av  a 2 s . c  o  m
        MessageDigest digest = MessageDigest.getInstance("MD5");
        byte[] buffer = new byte[4 * 1024];
        InputStream is = new FileInputStream(new File(filePath));
        int lent;
        while ((lent = is.read(buffer)) != -1) {
            digest.update(buffer, 0, lent);
        }
        is.close();
        return digest.digest();
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException("MD5 algorithm not found.");
    }
}

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