Example usage for java.security MessageDigest reset

Introduction

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

Prototype

public void reset() 

Source Link

Document

Resets the digest for further use.

Usage

From source file:com.cprassoc.solr.auth.security.Sha256AuthenticationProvider.java

public static String sha256(String password, String saltKey) {
    MessageDigest digest;
    try {/*from  w w w . j a va2s. c om*/
        digest = MessageDigest.getInstance("SHA-256");
    } catch (NoSuchAlgorithmException e) {
        log.error(e.getMessage(), e);
        return null;//should not happen
    }
    if (saltKey != null) {
        digest.reset();
        digest.update(Base64.decodeBase64(saltKey));
    }

    byte[] btPass = digest.digest(password.getBytes(StandardCharsets.UTF_8));
    digest.reset();
    btPass = digest.digest(btPass);
    return Base64.encodeBase64String(btPass);
}

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From source file:com.cws.esolutions.security.utils.PasswordUtils.java

/**
 * Provides one-way (irreversible) encryption of a provided string.
 *
 * @param plainText - The plain text data to encrypt
 * @param salt - The salt value to utilize for the request
 * @param instance - The security instance to utilize
 * @param iterations - The number of times the value should be re-encrypted
 * @param encoding - The text encoding//from   w  w w  .j  ava  2s . com
 * @return The encrypted string
 * @throws SecurityException {@link java.lang.SecurityException} if an exception occurs during processing
 */
public static final String encryptText(final String plainText, final String salt, final String instance,
        final int iterations, final String encoding) throws SecurityException {
    final String methodName = PasswordUtils.CNAME
            + "#encryptText(final String plainText, final String salt, final String algorithm, final String instance, final int iterations, final String encoding) throws SecurityException";

    if (DEBUG) {
        DEBUGGER.debug(methodName);
        DEBUGGER.debug("Value: {}", plainText);
        DEBUGGER.debug("Value: {}", salt);
        DEBUGGER.debug("Value: {}", instance);
        DEBUGGER.debug("Value: {}", iterations);
        DEBUGGER.debug("Value: {}", encoding);
    }

    String response = null;

    try {
        MessageDigest md = MessageDigest.getInstance(instance);
        md.reset();
        md.update(salt.getBytes(encoding));
        byte[] input = md.digest(plainText.getBytes(encoding));

        for (int x = 0; x < iterations; x++) {
            md.reset();
            input = md.digest(input);
        }

        response = Base64.getEncoder().encodeToString(input);
    } catch (NoSuchAlgorithmException nsx) {
        throw new SecurityException(nsx.getMessage(), nsx);
    } catch (UnsupportedEncodingException uex) {
        throw new SecurityException(uex.getMessage(), uex);
    }

    return response;
}

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From source file:com.demandware.vulnapp.util.Helpers.java

/**
 * SHA-1 with optional salt /*ww  w . j a  va 2s  . com*/
 * 
 * @param input String to hash
 * @param salt bytes to use as salt for sha
 * @return hex encoded hash
 */
public static String sha(String input, byte[] salt) {
    String ret = "";
    try {
        MessageDigest digest = MessageDigest.getInstance("SHA-1");
        digest.reset();
        if (salt != null) {
            digest.update(salt);
        }
        ret = Hex.encodeHexString(digest.digest(input.getBytes("UTF-8")));
    } catch (Throwable t) {
        //yeah this is bad... but there's no way to get either of the exceptions
        throw new RuntimeException(t);
    }
    return ret;
}

---

From source file:Manifest.java

/**
 * This convenience method is used by both create() and verify(). It reads
 * the contents of a named file and computes a message digest for it, using
 * the specified MessageDigest object./*  w w  w  .  j ava2s. c  om*/
 */
public static byte[] getFileDigest(String filename, MessageDigest md) throws IOException {
    // Make sure there is nothing left behind in the MessageDigest
    md.reset();

    // Create a stream to read from the file and compute the digest
    DigestInputStream in = new DigestInputStream(new FileInputStream(filename), md);

    // Read to the end of the file, discarding everything we read.
    // The DigestInputStream automatically passes all the bytes read to
    // the update() method of the MessageDigest
    while (in.read(buffer) != -1)
        /* do nothing */;

    // Finally, compute and return the digest value.
    return md.digest();
}

---

From source file:com.googlecode.osde.internal.utils.OpenSocialUtil.java

public static ApplicationInformation createApplicationInformation(String url)
        throws CoreException, ParserException, IOException {
    try {// w  w  w  .  j ava2s.c om
        Parser<Module> parser = ParserFactory.gadgetSpecParser();
        Module module = parser.parse(new URL(url).openStream());

        MessageDigest digest = MessageDigest.getInstance("MD5");
        byte[] hash = digest.digest(url.getBytes("UTF-8"));
        String appId = Gadgets.toHexString(hash);
        String consumerKey = "osde:" + url;
        digest.reset();
        hash = digest.digest(consumerKey.getBytes("UTF-8"));
        String consumerSecret = Gadgets.toHexString(hash);
        ApplicationInformation info = new ApplicationInformation();
        info.setAppId(appId);
        info.setModule(module);
        info.setPath(url);
        info.setConsumerKey(consumerKey);
        info.setConsumerSecret(consumerSecret);
        return info;
    } catch (NoSuchAlgorithmException e) {
        throw new IllegalStateException(e);
    } catch (UnsupportedEncodingException e) {
        throw new IllegalStateException(e);
    } catch (MalformedURLException e) {
        throw new IllegalStateException(e);
    }
}

---

From source file:de.alpharogroup.file.checksum.ChecksumExtensions.java

/**
 * Gets the checksum from the given byte array with an instance of.
 *
 * @param bytes/*from   w w  w.j av a 2s .  c  om*/
 *            the byte array.
 * @param algorithm
 *            the algorithm to get the checksum. This could be for instance "MD4", "MD5",
 *            "SHA-1", "SHA-256", "SHA-384" or "SHA-512".
 * @return The checksum from the file as a String object.
 * @throws NoSuchAlgorithmException
 *             Is thrown if the algorithm is not supported or does not exists.
 *             {@link java.security.MessageDigest} object.
 */
public static String getChecksum(final byte[] bytes, final String algorithm) throws NoSuchAlgorithmException {
    final MessageDigest messageDigest = MessageDigest.getInstance(algorithm);
    messageDigest.reset();
    messageDigest.update(bytes);
    final byte digest[] = messageDigest.digest();
    final StringBuilder hexView = new StringBuilder();
    for (final byte element : digest) {
        final String intAsHex = Integer.toHexString(0xFF & element);
        if (intAsHex.length() == 1) {
            hexView.append('0');
        }
        hexView.append(intAsHex);
    }
    return hexView.toString();
}

---

From source file:com.googlecode.osde.internal.utils.OpenSocialUtil.java

public static ApplicationInformation createApplicationInformation(IFile file)
        throws CoreException, ParserException {
    try {/*from   w  ww .j a  v  a 2  s  .  co  m*/
        Parser<Module> parser = ParserFactory.gadgetSpecParser();
        Module module = parser.parse(file.getContents());

        String path = file.getFullPath().toPortableString();
        MessageDigest digest = MessageDigest.getInstance("MD5");
        byte[] hash = digest.digest(path.getBytes("UTF-8"));
        String appId = Gadgets.toHexString(hash);
        String consumerKey = "osde:" + path;
        digest.reset();
        hash = digest.digest(consumerKey.getBytes("UTF-8"));
        String consumerSecret = Gadgets.toHexString(hash);
        ApplicationInformation info = new ApplicationInformation();
        info.setAppId(appId);
        info.setModule(module);
        info.setPath(file.getFullPath().toPortableString());
        info.setConsumerKey(consumerKey);
        info.setConsumerSecret(consumerSecret);
        return info;
    } catch (NoSuchAlgorithmException e) {
        throw new IllegalStateException(e);
    } catch (UnsupportedEncodingException e) {
        throw new IllegalStateException(e);
    }
}

---

From source file:eu.cassandra.sim.utilities.Utils.java

public static String hashcode(String message) {
    String hash = null;//from   w  ww. j a v a  2s .  c o  m
    try {
        MessageDigest cript = MessageDigest.getInstance("SHA-1");
        cript.reset();
        cript.update(message.getBytes("utf8"));
        hash = new BigInteger(1, cript.digest()).toString(16);
    } catch (NoSuchAlgorithmException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (UnsupportedEncodingException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return hash;
}

---

From source file:com.lightbox.android.bitmap.BitmapUtils.java

private static String getFileMD5(File file) {
    try {/* w  ww  .  ja va 2 s . c o m*/
        MessageDigest md5 = MessageDigest.getInstance("MD5");
        md5.reset();

        FileInputStream fileInputStream = null;
        try {
            fileInputStream = new FileInputStream(file);
            byte[] buffer = new byte[8192];
            int count;
            while ((count = fileInputStream.read(buffer)) != -1) {
                md5.update(buffer, 0, count);
            }

            return md5ToString(md5.digest()).toString();
        } finally {
            IOUtils.closeQuietly(fileInputStream);
        }
    } catch (NoSuchAlgorithmException e) {
        Log.w(TAG, e);
    } catch (FileNotFoundException e) {
        Log.w(TAG, e);
    } catch (IOException e) {
        Log.w(TAG, e);
    }

    return "";
}

---

From source file:net.seleucus.wsp.crypto.FwknopSymmetricCrypto.java

protected static byte[][] deriveKeyAndIV(byte[] salt, byte[] master_key)
        throws NoSuchAlgorithmException, IOException {

    byte[] key = new byte[KEY_LEN];
    byte[] IV = new byte[IV_LEN];

    MessageDigest md5 = MessageDigest.getInstance("MD5");

    ByteArrayOutputStream data = new ByteArrayOutputStream();
    ByteArrayOutputStream toHash = new ByteArrayOutputStream();
    byte[] d = null;

    while (data.size() < IV_LEN + KEY_LEN) {
        md5.reset();
        toHash.reset();//  ww  w  .  ja va  2  s  .c o  m
        if (d != null)
            toHash.write(d);
        toHash.write(master_key);
        toHash.write(salt);
        d = md5.digest(toHash.toByteArray());
        data.write(d);
    }

    byte[] output = data.toByteArray();

    System.arraycopy(output, 0, key, 0, KEY_LEN);
    System.arraycopy(output, KEY_LEN, IV, 0, IV_LEN);

    return new byte[][] { key, IV };
}

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