Example usage for java.security MessageDigest getInstance

Introduction

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

Prototype

public static MessageDigest getInstance(String algorithm) throws NoSuchAlgorithmException

Source Link

Document

Returns a MessageDigest object that implements the specified digest algorithm.

Usage

From source file:Main.java

private static String sha1Hash(String toHash) {
    String hash = null;//  w w w.  j a  v a2  s. co m
    try {
        MessageDigest digest = MessageDigest.getInstance("SHA-1");
        byte[] bytes = toHash.getBytes("UTF-8");
        digest.update(bytes, 0, bytes.length);
        bytes = digest.digest();

        // This is ~55x faster than looping and String.formating()
        hash = bytesToHex(bytes);
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }
    return hash;
}

From source file:Main.java

public static byte[] SHA1(String text) throws NoSuchAlgorithmException, UnsupportedEncodingException {
    MessageDigest md;/*from ww w  . j a  v  a  2  s.  c om*/
    md = MessageDigest.getInstance("SHA-1");
    byte[] sha1hash = new byte[40];
    md.update(text.getBytes(), 0, text.length());
    // "iso-8859-1"
    sha1hash = md.digest();
    return (sha1hash);
}

From source file:Main.java

/**
 * //from w  w  w  . ja  v  a 2s.  c o m
 * @param word
 *            the string to be hashed
 * @return SHA1-hash of the word
 */
public static String hash(String word) {
    byte[] data = word.getBytes();
    MessageDigest md = null;
    try {
        md = MessageDigest.getInstance("SHA-1");
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
    byte[] b = md.digest(data);
    String result = "";
    for (int i = 0; i < b.length; i++) {
        result += Integer.toString((b[i] & 0xff) + 0x100, 16).substring(1);
    }
    return result;
}

From source file:Main.java

public static String getPwdHash(String password, String salt) {
    try {/*from   ww  w.  ja  va  2  s . c o m*/
        String temp = password + salt;
        MessageDigest md = MessageDigest.getInstance("SHA-256");

        md.update(temp.getBytes("UTF-8")); // Change this to "UTF-16" if needed
        byte[] digest = md.digest();
        return String.format("%0" + (digest.length * 2) + 'x', new BigInteger(1, digest));
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e);
    } catch (UnsupportedEncodingException e) {
        throw new RuntimeException(e);
    }
}

From source file:Main.java

/**
 * A hashing method that changes a string (like a URL) into a hash suitable
 * for using as a disk filename.//from   ww w .jav a2 s.co m
 */
public static String hashKeyForUrl(String key) {
    String cacheKey;
    try {
        final MessageDigest mDigest = MessageDigest.getInstance("MD5");
        mDigest.update(key.getBytes());
        cacheKey = bytesToHexString(mDigest.digest());
    } catch (NoSuchAlgorithmException e) {
        cacheKey = String.valueOf(key.hashCode());
    }
    return cacheKey;
}

From source file:Main.java

/**
 * Compute the MD5 hash of the byte array provided. Does not accumulate
 * input./*ww  w . j a va2  s.  co m*/
 * @param in the byte array to hash
 * @return the MD5 hash of the byte array
 */
public static byte[] computeMd5Hash(byte[] in) {
    try {
        MessageDigest md5 = MessageDigest.getInstance("MD5");
        return md5.digest(in);
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e);
    }
}

From source file:Main.java

private static String getCertificateSHA1(X509Certificate certificate)
        throws NoSuchAlgorithmException, CertificateEncodingException {
    MessageDigest messageDigest = MessageDigest.getInstance("SHA-1");
    byte[] der = certificate.getEncoded();
    messageDigest.update(der);/*w w  w .  j  a  v a 2  s . co  m*/
    byte[] digest = messageDigest.digest();
    return hexify(digest);
}

From source file:Main.java

private static String encode(String str, String method) {
    MessageDigest md = null;/*w  w  w .ja va2s  .  co  m*/
    String dstr = null;
    try {
        md = MessageDigest.getInstance(method);
        md.update(str.getBytes());
        dstr = new BigInteger(1, md.digest()).toString(16);
        int dstrCount = 32 - dstr.length();
        for (int i = 0; i < dstrCount; i++) {
            dstr = "0" + dstr;
        }
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
    return dstr;
}

From source file:Main.java

private static byte[] hashTemplate(byte[] data, String algorithm) {
    if (data == null || data.length <= 0)
        return null;
    try {/*from   w  w w.  j  av a 2  s .  c o  m*/
        MessageDigest md = MessageDigest.getInstance(algorithm);
        md.update(data);
        return md.digest();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
        return null;
    }
}

From source file:Main.java

public static String md5Calc(File f) {
    int i;//from ww  w. j  av  a2 s  .c  om

    byte[] buffer = new byte[1024];
    int read = 0;
    String md5hash;
    try {
        MessageDigest digest = MessageDigest.getInstance("MD5");
        InputStream is = new FileInputStream(f);
        while ((read = is.read(buffer)) > 0) {
            digest.update(buffer, 0, read);
        }
        byte[] md5sum = digest.digest();
        BigInteger bigInt = new BigInteger(1, md5sum);
        md5hash = bigInt.toString(16);
        is.close();
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }

    if (md5hash.length() != 33) {
        String tmp = "";
        for (i = 1; i < (33 - md5hash.length()); i++) {
            tmp = tmp.concat("0");
        }
        md5hash = tmp.concat(md5hash);
    }

    return md5hash;
}