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:data.repository.pragma.utils.MD5Utils.java

public static String getMD5(String file_url) {

    URL url;/*  w  w w  .  j  a  va 2  s  .  c  om*/
    try {
        url = new URL(file_url);
        InputStream is = url.openStream();
        MessageDigest md = MessageDigest.getInstance("MD5");
        String digest = getDigest(is, md, 2048);
        return digest;
    } catch (MalformedURLException e) {
        // TODO Auto-generated catch block
        return null;
    } catch (IOException e) {
        // TODO Auto-generated catch block
        return null;
    } catch (NoSuchAlgorithmException e) {
        // TODO Auto-generated catch block
        return null;
    }
}

From source file:brainleg.app.util.EncryptionUtil.java

private static byte[] generateDigest(String algorithm, byte[] data) {
    if (data == null) {
        return null;
    }//from   w ww  . ja v a 2  s .  c  o  m

    try {
        MessageDigest messageDigest = MessageDigest.getInstance(algorithm);
        byte[] digest = messageDigest.digest(data);
        return digest;
    } catch (NoSuchAlgorithmException e) {
        throw new IllegalArgumentException(e);
    }
}

From source file:Main.java

/**
 * Digests the given message with the given algorithm
 *
 * @param originalMessage the original message
 * @param algorithm the algorithm// w w w. ja  v a  2 s.  c  om
 * @return the byte [ ]
 * @throws NoSuchAlgorithmException if the given algorithm does not exist in JCA
 */
public static byte[] digestMessage(byte[] originalMessage, String algorithm) throws NoSuchAlgorithmException {
    MessageDigest messageDigest;
    messageDigest = MessageDigest.getInstance(algorithm);

    messageDigest.update(originalMessage, 0, originalMessage.length);
    return messageDigest.digest();
}

From source file:StringUtils.java

/**
 * Encode a string using algorithm specified in web.xml and return the
 * resulting encrypted password. If exception, the plain credentials
 * string is returned/*www .ja  va2  s  . co m*/
 *
 * @param password Password or other credentials to use in authenticating
 *        this username
 * @param algorithm Algorithm used to do the digest
 *
 * @return encypted password based on the algorithm.
 */
public static String encodePassword(String password, String algorithm) {
    byte[] unencodedPassword = password.getBytes();

    MessageDigest md = null;

    try {
        // first create an instance, given the provider
        md = MessageDigest.getInstance(algorithm);
    } catch (Exception e) {
        System.out.println(e);

        return password;
    }

    md.reset();

    // call the update method one or more times
    // (useful when you don't know the size of your data, eg. stream)
    md.update(unencodedPassword);

    // now calculate the hash
    byte[] encodedPassword = md.digest();

    StringBuffer buf = new StringBuffer();

    for (int i = 0; i < encodedPassword.length; i++) {
        if ((encodedPassword[i] & 0xff) < 0x10) {
            buf.append("0");
        }

        buf.append(Long.toString(encodedPassword[i] & 0xff, 16));
    }

    return buf.toString();
}

From source file:com.netflix.exhibitor.core.s3.S3Utils.java

public static byte[] md5(byte[] buffer, int length) {
    try {//  www  . j a  v  a 2  s  .c o m
        MessageDigest mdigest = MessageDigest.getInstance("MD5");
        mdigest.update(buffer, 0, length);
        return mdigest.digest();
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

From source file:Main.java

/**
 * Compute the sha-256 digest of data./*from  w  w  w. j  av  a  2s .  co m*/
 * @param data The input byte buffer. This does not change the position.
 * @return The digest.
 */
public static byte[] digestSha256(ByteBuffer data) {
    MessageDigest sha256;
    try {
        sha256 = MessageDigest.getInstance("SHA-256");
    } catch (NoSuchAlgorithmException exception) {
        // Don't expect this to happen.
        throw new Error("MessageDigest: SHA-256 is not supported: " + exception.getMessage());
    }
    int savePosition = data.position();
    sha256.update(data);
    data.position(savePosition);
    return sha256.digest();
}

From source file:Main.java

public static void printKeyHash(Activity pActivity) {
    // Add code to print out the key hash
    try {/* ww w  .j av a  2  s  .com*/
        PackageInfo info = pActivity.getPackageManager().getPackageInfo(pActivity.getPackageName(),
                PackageManager.GET_SIGNATURES);
        for (Signature signature : info.signatures) {
            MessageDigest md = MessageDigest.getInstance("SHA");
            md.update(signature.toByteArray());
            Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
        }
    } catch (PackageManager.NameNotFoundException e) {
        Log.d("KeyHash:", e.toString());
    } catch (NoSuchAlgorithmException e) {
        Log.d("KeyHash:", e.toString());
    }
}

From source file:com.aast.encrypt.EncryptManager.java

private static byte[] getKeyFromString(String keyStr)
        throws UnsupportedEncodingException, NoSuchAlgorithmException {
    byte[] key = keyStr.getBytes("UTF-8");
    MessageDigest sha = MessageDigest.getInstance("SHA-1");
    key = sha.digest(key);/*from  w ww.java  2  s. c  o  m*/
    key = Arrays.copyOf(key, 16); // use only first 128 bit
    return key;
}

From source file:Main.java

private static String getMD5(byte[] source) {
    try {//ww w  .  j  a  v a2 s.  c  o  m
        MessageDigest md5 = MessageDigest.getInstance("MD5");
        StringBuffer result = new StringBuffer();
        for (byte b : md5.digest(source)) {
            result.append(Integer.toHexString((b & 0xf0) >>> 4));
            result.append(Integer.toHexString(b & 0x0f));
        }
        return result.toString();
    } catch (Exception e) {
        throw new RuntimeException(e.getMessage(), e);
    }
}

From source file:Main.java

public static String getMD5(String str) {
    if (str != null) {
        try {/*w w  w  . java  2  s . co m*/
            final BigInteger bigInt;
            if (sMD5Digest == null) {
                sMD5Digest = MessageDigest.getInstance("MD5");
            }
            synchronized (sMD5Digest) {
                sMD5Digest.reset();
                bigInt = new BigInteger(1, sMD5Digest.digest(str.getBytes("UTF-8")));
            }
            String hash = bigInt.toString(16);
            while (hash.length() < 32) {
                hash = "0" + hash;
            }
            return hash;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    return null;
}