Example usage for java.security MessageDigest digest

Introduction

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

Prototype

public byte[] digest()

Source Link

Document

Completes the hash computation by performing final operations such as padding.

Usage

From source file:Main.java

public static String md5(String s) {
    try {//  ww w  .j av a 2s  .  c o  m
        MessageDigest digester = MessageDigest.getInstance("MD5");
        digester.update(s.getBytes("UTF-8"));
        byte[] a = digester.digest();
        int len = a.length;
        StringBuilder sb = new StringBuilder(len << 1);

        for (int i = 0; i < len; i++) {
            sb.append(Character.forDigit((a[i] & 0xf0) >> 4, 16));
            sb.append(Character.forDigit(a[i] & 0x0f, 16));
        }

        return sb.toString();
    } catch (UnsupportedEncodingException e) {
        return "";
    } catch (NoSuchAlgorithmException e) {
        return "";
    }
}

From source file:Main.java

public static String imageDigest(BufferedImage img) {

    // write image to byte stream
    ByteArrayOutputStream os = new ByteArrayOutputStream();
    try {/*ww w .  j  a  v a2 s  . c  o m*/
        ImageIO.write(img, "png", os);
        os.flush();
    } catch (IOException e) {
        e.printStackTrace();
        return null;
    }
    byte[] data = os.toByteArray();

    // compute md5 hash
    byte[] hash = null;
    try {
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(data);
        hash = md.digest();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
        return null;
    }

    // convert to string
    String hexString = "";
    for (int i = 0; i < hash.length; i++) {
        hexString += Integer.toString((hash[i] & 0xff) + 0x100, 16).substring(1);
    }
    return hexString;
}

From source file:Main.java

public static String hashMD5(String s) {
    try {/*from   www  .  j  a  v  a 2  s.  co  m*/
        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

public static String stringToMD5(String str) {

    try {//from  w  w w .j av a2 s.  c o  m
        byte[] strTemp = str.getBytes();
        MessageDigest mdTemp = MessageDigest.getInstance("MD5");
        mdTemp.update(strTemp);
        return toHexString(mdTemp.digest());
    } catch (Exception e) {
        return null;
    }
}

From source file:Main.java

public static String md5(final String s) {
    final String MD5 = "MD5";
    try {/*  ww  w. j a  va2  s .  c  o m*/
        // Create MD5 Hash
        MessageDigest digest = MessageDigest.getInstance(MD5);
        digest.update(s.getBytes());
        byte messageDigest[] = digest.digest();

        // Create Hex String
        StringBuilder hexString = new StringBuilder();
        for (byte aMessageDigest : messageDigest) {
            String h = Integer.toHexString(0xFF & aMessageDigest);
            while (h.length() < 2)
                h = "0" + h;
            hexString.append(h);
        }
        return hexString.toString();

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

From source file:Main.java

public static String computeMD5(byte[] input) {
    try {//w ww  . j  ava2 s. c  o  m
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(input, 0, input.length);
        byte[] md5bytes = md.digest();

        StringBuffer hexString = new StringBuffer();
        for (int i = 0; i < md5bytes.length; i++) {
            String hex = Integer.toHexString(0xff & md5bytes[i]);
            if (hex.length() == 1)
                hexString.append('0');
            hexString.append(hex);
        }
        return hexString.toString();
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e);
    }
}

From source file:Main.java

public static String toMd5(String input) {
    String output = input;/*from ww  w . j  a  v  a 2s  .  c  om*/
    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

private static String md5(final String s) {
    final String MD5 = "MD5";
    try {/* www .  j  av  a 2  s . c o m*/
        MessageDigest digest = MessageDigest.getInstance(MD5);
        digest.update(s.getBytes());
        byte messageDigest[] = digest.digest();

        StringBuilder hexString = new StringBuilder();
        for (byte aMessageDigest : messageDigest) {
            String h = Integer.toHexString(0xFF & aMessageDigest);
            while (h.length() < 2)
                h = "0" + h;
            hexString.append(h);
        }
        return hexString.toString();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
    return "";
}

From source file:Main.java

public static final String md5(String tps) {
    final String MD5 = "MD5";
    try {/*from  w  w  w  .  ja  v a2 s  .c  o m*/
        // Create MD5 Hash
        MessageDigest digest = MessageDigest.getInstance(MD5);
        digest.update(tps.getBytes());
        byte messageDigest[] = digest.digest();

        // Create Hex String
        StringBuilder hexString = new StringBuilder();
        for (byte aMessageDigest : messageDigest) {
            String h = Integer.toHexString(0xFF & aMessageDigest);
            while (h.length() < 2)
                h = "0" + h;
            hexString.append(h);
        }
        return hexString.toString();

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

From source file:Main.java

public static String md5L(String input) {
    try {/* w  w  w  .  j a va  2 s  . co m*/
        MessageDigest mdInst = MessageDigest.getInstance("MD5");
        mdInst.update(input.getBytes());
        byte[] md = mdInst.digest();
        StringBuilder hexString = new StringBuilder();
        for (byte aMd : md) {
            String shaHex = Integer.toHexString(aMd & 0xFF);
            if (shaHex.length() < 2) {
                hexString.append(0);
            }
            hexString.append(shaHex);
        }
        return hexString.toString();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
    return "";
}