Example usage for java.security MessageDigest getInstance

List of usage examples for java.security MessageDigest getInstance

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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:edu.mit.media.funf.HashUtil.java

public static MessageDigest getMessageDigest() {
    if (instance == null) {
        try {//from   w w  w .  j  a  v  a 2 s.c  o  m
            instance = MessageDigest.getInstance("SHA-1");
        } catch (NoSuchAlgorithmException e) {
            Log.e(TAG, "HashUtil no SHA alghrithom", e);
            return null;
        }
    }
    return instance;
}

From source file:ca.ualberta.physics.cssdp.util.HashUtils.java

/**
 * From a password, a number of iterations and a salt, returns the
 * corresponding digest//from  w  ww  .j ava2s  .  c o m
 * 
 * @param iterationNb
 *            int The number of iterations of the algorithm
 * @param password
 *            String The password to encrypt
 * @param salt
 *            byte[] The salt
 * @return byte[] The digested password
 * @throws NoSuchAlgorithmException
 *             If the algorithm doesn't exist
 */
public static byte[] getHash(int iterationNb, String password, byte[] salt) {
    try {
        MessageDigest digest = MessageDigest.getInstance("SHA-1");
        digest.reset();
        digest.update(salt);
        byte[] input = digest.digest(password.getBytes("UTF-8"));
        for (int i = 0; i < iterationNb; i++) {
            digest.reset();
            input = digest.digest(input);
        }
        return input;
    } catch (NoSuchAlgorithmException nsa) {
        throw Throwables.propagate(nsa);
    } catch (UnsupportedEncodingException e) {
        throw Throwables.propagate(e);
    }
}

From source file:controlpac.EncryptHelper.java

public static String Desencriptar(String textoEncriptado) {
    String base64EncryptedString = "";
    try {/* ww  w . j av a2s. co m*/
        byte[] message = Base64.decodeBase64(textoEncriptado.getBytes("utf-8"));//Desencodea el texto en base64
        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] digestOfPassword = md.digest(secretKey.getBytes("utf-8")); //Crea un hash con la clave elegida
        byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
        SecretKey key = new SecretKeySpec(keyBytes, "DESede");//Crea la clave 
        Cipher decipher = Cipher.getInstance("DESede");
        decipher.init(Cipher.DECRYPT_MODE, key); //Inicia el descifrado
        byte[] plainText = decipher.doFinal(message);//Descifra el texto
        base64EncryptedString = new String(plainText, "UTF-8");
    } catch (Exception ex) {
    }
    return base64EncryptedString;
}

From source file:$.Digests.java

/**
     * , ?md5sha1.//  ww w . ja  v  a2  s.  c o  m
     */
    private static byte[] digest(byte[] input, String algorithm, byte[] salt, int iterations) {
        try {
            MessageDigest digest = MessageDigest.getInstance(algorithm);

            if (salt != null) {
                digest.update(salt);
            }

            byte[] result = digest.digest(input);

            for (int i = 1; i < iterations; i++) {
                digest.reset();
                result = digest.digest(result);
            }
            return result;
        } catch (GeneralSecurityException e) {
            throw Exceptions.unchecked(e);
        }
    }

From source file:com.github.feribg.audiogetter.helpers.Utils.java

public static String calculateMD5(File file) {
    MessageDigest digest;/*  w  w  w  . j a  va2  s .c  o m*/
    try {
        digest = MessageDigest.getInstance("MD5");
    } catch (NoSuchAlgorithmException e) {
        Log.e(App.TAG, "Exception while getting Digest", e);
        return null;
    }

    InputStream is;
    try {
        is = new FileInputStream(file);
    } catch (FileNotFoundException e) {
        Log.e(App.TAG, "Exception while getting FileInputStream", e);
        return null;
    }

    byte[] buffer = new byte[8192];
    int read;
    try {
        while ((read = is.read(buffer)) > 0) {
            digest.update(buffer, 0, read);
        }
        byte[] md5sum = digest.digest();
        BigInteger bigInt = new BigInteger(1, md5sum);
        String output = bigInt.toString(16);
        // Fill to 32 chars
        output = String.format("%32s", output).replace(' ', '0');
        return output;
    } catch (IOException e) {
        //throw new RuntimeException("Unable to process file for MD5", e);
        Log.e(App.TAG, "Unable to process file for MD5", e); //TODO check if actually avoid FC
        return "00000000000000000000000000000000"; // fictional bad MD5: needed without "throw new RuntimeException"
    } finally {
        try {
            is.close();
        } catch (IOException e) {
            Log.e(App.TAG, "Exception on closing MD5 input stream", e);
        }
    }
}

From source file:inventory.pl.helpers.Encryptor.java

public synchronized String encrypt(String plaintext, boolean useXor) {
    if (useXor)/*from  ww  w  .  j a  v a  2s .com*/
        plaintext = getXoredString(plaintext);
    MessageDigest md = null;
    try {
        md = MessageDigest.getInstance("SHA-256"); //step 2
    } catch (NoSuchAlgorithmException e) {

    }
    try {
        md.update(plaintext.getBytes("UTF-8")); //step 3
    } catch (UnsupportedEncodingException e) {

    }

    byte raw[] = md.digest(); //step 4
    String hash = Base64.encodeBase64String(raw); //step 5
    return hash; //step 6
}

From source file:net.longfalcon.newsj.util.EncodingUtil.java

public static String md5Hash(String input) {
    if (_md5Digest == null) {
        try {/*w ww.  java2 s .c o m*/
            _md5Digest = MessageDigest.getInstance("MD5");
        } catch (NoSuchAlgorithmException e) {
            // this will not fail.
            e.printStackTrace();
            return null;
        }
    }

    byte[] digest = _md5Digest.digest(input.getBytes());

    StringBuilder sb = new StringBuilder();

    for (byte b : digest) {
        sb.append(String.format("%02x", b));
    }

    return sb.toString();
}

From source file:com.roncoo.pay.permission.utils.RonCooSignUtil.java

/**
 * @param timeStamp//from w w w. j  a v  a  2 s  .c  o m
 * @param userName
 * @param userPwd
 * @return
 */
public static String getSign(String token, long timeStamp, String userName) {

    String[] arr = new String[] { token, String.valueOf(timeStamp), userName };
    // token?timestamp?nonce?userPwd???
    Arrays.sort(arr);
    StringBuilder content = new StringBuilder();
    for (int i = 0; i < arr.length; i++) {
        content.append(arr[i]);
    }
    MessageDigest md = null;
    String tmpStr = null;

    try {
        md = MessageDigest.getInstance("SHA-1");
        // ??sha1
        byte[] digest = md.digest(content.toString().getBytes());
        tmpStr = byteToStr(digest);
    } catch (NoSuchAlgorithmException e) {
        LOG.error(e);
    }
    return tmpStr;
}

From source file:com.zotoh.maedr.device.netty.NettpHplr.java

/**
 * @param key//from   w  w  w. ja va 2s.  c o  m
 * @return
 */
public static String calcHybiSecKeyAccept(String key) {
    // add fix GUID according to 
    // http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-10
    String k = key + "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
    String rc = "";
    try {
        MessageDigest md = MessageDigest.getInstance("SHA-1");
        byte[] bits = md.digest(k.getBytes("utf-8"));
        rc = Base64.encodeBase64String(bits);
    } catch (Exception e) {
        //TODO
    }
    return rc;
}

From source file:me.j360.dubbo.modules.util.text.HashUtil.java

private static ThreadLocal<MessageDigest> createThreadLocalMessageDigest(final String digest) {
    return new ThreadLocal<MessageDigest>() {
        @Override/*from   w  w  w.ja va 2  s  . c o m*/
        protected MessageDigest initialValue() {
            try {
                return MessageDigest.getInstance(digest);
            } catch (NoSuchAlgorithmException e) {
                throw new RuntimeException(
                        "unexpected exception creating MessageDigest instance for [" + digest + "]", e);
            }
        }
    };
}