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:Main.java

public static void main(String[] args) throws Exception {
    URL u = new URL("http://www.google.com");
    InputStream in = u.openStream();
    MessageDigest sha = MessageDigest.getInstance("SHA");
    byte[] data = new byte[1024];
    int bytesRead = -1;
    while ((bytesRead = in.read(data)) >= 0) {
        sha.update(data, 0, bytesRead);
    }/*from w  w w .  ja  va2  s .  c o m*/
    byte[] result = sha.digest();
    System.out.println(Arrays.toString(result));
    System.out.println(new BigInteger(result));
}

From source file:Main.java

public static void main(String args[]) throws Exception {
    InputStream fis = new FileInputStream("a.exe");

    byte[] buffer = new byte[1024];
    MessageDigest complete = MessageDigest.getInstance("MD5");
    int numRead;//from  w w  w. j a  va2s.  c o  m
    do {
        numRead = fis.read(buffer);
        if (numRead > 0) {
            complete.update(buffer, 0, numRead);
        }
    } while (numRead != -1);
    fis.close();

    byte[] b = complete.digest();
    String result = "";
    for (int i = 0; i < b.length; i++) {
        result += Integer.toString((b[i] & 0xff) + 0x100, 16).substring(1);
    }
    System.out.println(result);

}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    if (args.length != 1) {
        System.out.println("Usage: Masher filename");
        return;//w  w  w.ja  v a  2  s  .c o  m
    }
    MessageDigest md = MessageDigest.getInstance("MD5");
    FileInputStream in = new FileInputStream(args[0]);
    byte[] buffer = new byte[8192];
    int length;
    while ((length = in.read(buffer)) != -1)
        md.update(buffer, 0, length);
    byte[] raw = md.digest();
    BASE64Encoder encoder = new BASE64Encoder();
    String base64 = encoder.encode(raw);
    System.out.println(base64);
}

From source file:Main.java

public static String convertToMD5(String toEnc) {
    try {//from  w ww  . ja  v  a 2 s.  c  o  m
        MessageDigest mdEnc = MessageDigest.getInstance("MD5");
        mdEnc.update(toEnc.getBytes(), 0, toEnc.length());
        return new BigInteger(1, mdEnc.digest()).toString(16);
    } catch (Exception e) {
        return null;
    }
}

From source file:Main.java

public static byte[] computeSHA256(byte[] convertme, int offset, int len) {
    try {/*from  w ww .  j av a 2 s.  co  m*/
        MessageDigest md = MessageDigest.getInstance("SHA-256");
        md.update(convertme, offset, len);
        return md.digest();
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

From source file:Main.java

public static String toMd5(String input) {
    String output = input;/*from   w w w  . j  a v  a2 s. co m*/
    try {
        MessageDigest md5 = MessageDigest.getInstance("MD5");
        md5.update(input.getBytes(), 0, input.length());
        output = new BigInteger(1, md5.digest()).toString(16);

    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
    return output;
}

From source file:Main.java

public static String hashMD5(String s) {
    try {/*  w  w w  .  j  a v  a2s  . c  om*/
        MessageDigest m = MessageDigest.getInstance("MD5");
        m.update(s.getBytes(), 0, s.length());
        String result = new BigInteger(1, m.digest()).toString();
        while (result.length() < 32) {
            result = "0" + result;
        }
        return result;
    } catch (NoSuchAlgorithmException e) {
        return null;
    }
}

From source file:Main.java

private static String hashAlgorithm(String hash, String text)
        throws NoSuchAlgorithmException, UnsupportedEncodingException {
    MessageDigest md = MessageDigest.getInstance(hash);
    md.update(text.getBytes("iso-8859-1"), 0, text.length());

    return convertToHex(md.digest());
}

From source file:Main.java

public static String makeSHA1HashBase64(byte[] bytes) {
    try {//from www . j  a  v a  2s .  co m
        MessageDigest md = MessageDigest.getInstance("SHA-1");
        md.update(bytes, 0, bytes.length);
        byte[] sha1hash = md.digest();
        return Base64.encodeToString(sha1hash, Base64.URL_SAFE | Base64.NO_PADDING | Base64.NO_WRAP);
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e);
    }
}

From source file:Main.java

/**
 * Computes the SHA1 Hash of given UTF-8 data.
 *
 * @param message/*from   w ww. j  a v a  2s .c  o m*/
 * @return
 * @throws UnsupportedEncodingException
 * @throws NoSuchAlgorithmException
 */
public static String SHA1(String message) throws UnsupportedEncodingException, NoSuchAlgorithmException {
    byte[] data = message.getBytes("UTF-8");
    MessageDigest md = MessageDigest.getInstance("SHA1");
    md.update(data, 0, data.length);
    byte[] digest = md.digest();
    return bytesToHex(digest);
}