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:Main.java

/**
 * Calculation md5 hash of string// www. j a  va 2s.  c  o  m
 * 
 * @param s - string for hash calculation
 * @return md5 hash of input string
 */
public static String MD5Hash(String s) {
    int sHash = s.hashCode();

    String result = md5Cache.get(sHash);

    if (result != null)
        return result;

    try {
        if (MD5 == null)
            MD5 = MessageDigest.getInstance("MD5");

        MessageDigest alg = (MessageDigest) MD5.clone();
        alg.update(s.getBytes());

        StringBuffer hexString = new StringBuffer(32);

        for (byte b : alg.digest())
            hexString.append(intToHexChars(0xFF & b));

        result = hexString.toString();
    } catch (Exception e) {
    }

    if (result == null)
        result = String.valueOf(s.hashCode());
    md5Cache.put(sHash, result);

    return result;
}

From source file:Main.java

public static String computeMD5(byte[] input) {
    try {//from ww  w .  jav a  2s. c  o m
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(input, TYPE_NOT_CONNECTED, input.length);
        byte[] md5bytes = md.digest();
        StringBuffer hexString = new StringBuffer();
        for (int i = TYPE_NOT_CONNECTED; i < md5bytes.length; i += TYPE_WIFI) {
            String hex = Integer.toHexString(md5bytes[i] & MotionEventCompat.ACTION_MASK);
            if (hex.length() == TYPE_WIFI) {
                hexString.append('0');
            }
            hexString.append(hex);
        }
        return hexString.toString();
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e);
    }
}

From source file:MD5.java

public static String create(String content) throws MD5IsNotSupported {
    String result = "";
    try {//  w  ww.  j  a  v  a  2  s .c  om
        byte[] defaultBytes = content.getBytes();
        MessageDigest algorithm = MessageDigest.getInstance("MD5");
        algorithm.reset();
        algorithm.update(defaultBytes);
        byte messageDigest[] = algorithm.digest();

        StringBuffer hexString = new StringBuffer();
        for (int i = 0; i < messageDigest.length; i++) {
            hexString.append(Integer.toHexString(0xFF & messageDigest[i]));
        }
        result = hexString.toString();
    } catch (NoSuchAlgorithmException ex) {
        throw new MD5IsNotSupported(ex);
    }

    assert !result.isEmpty();
    return result;
}

From source file:Main.java

public static void printOutMyHashKey(Context context, String packageName) {
    try {/*from  w ww . j  ava2 s  . c o  m*/
        PackageInfo info = context.getPackageManager().getPackageInfo(packageName,
                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) {
        e.printStackTrace();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
}

From source file:mx.com.pendulum.carga.util.Md5Converter.java

public static String calculaMD5(byte[] data) {
    InputStream is = new ByteArrayInputStream(data);
    try {/*  w w  w. j  a v  a2 s . c o m*/
        byte[] buffer = new byte[1024];
        MessageDigest digest = MessageDigest.getInstance("MD5");
        int numRead = 0;
        while (numRead != -1) {
            numRead = is.read(buffer);
            if (numRead > 0) {
                digest.update(buffer, 0, numRead);
            }
        }
        byte[] md5Bytes = digest.digest();
        return convertHashToString(md5Bytes);
    } catch (Exception e) {
        return null;
    } finally {
        if (is != null) {
            try {
                is.close();
            } catch (Exception e) {
            }
        }
    }

}

From source file:Main.java

public static String getMD5Str(String str) {
    MessageDigest messageDigest = null;
    try {//www  . j a  v a 2s  .  c  o m
        messageDigest = MessageDigest.getInstance("MD5");

        messageDigest.reset();

        messageDigest.update(str.getBytes("UTF-8"));
    } catch (NoSuchAlgorithmException e) {
        System.out.println("NoSuchAlgorithmException caught!");
    } catch (UnsupportedEncodingException e) {
    }

    byte[] byteArray = messageDigest.digest();

    StringBuffer md5StrBuff = new StringBuffer();

    for (int i = 0; i < byteArray.length; i++) {
        if (Integer.toHexString(0xFF & byteArray[i]).length() == 1)
            md5StrBuff.append("0").append(Integer.toHexString(0xFF & byteArray[i]));
        else
            md5StrBuff.append(Integer.toHexString(0xFF & byteArray[i]));
    }
    return md5StrBuff.substring(0, 24).toString().toUpperCase();
}

From source file:controlpac.EncryptHelper.java

public static String Encriptar(String texto) {
    String base64EncryptedString = "";
    try {//w  w w.j  av  a2  s  . c  o m
        MessageDigest md = MessageDigest.getInstance("MD5"); //Crea un hash con la clave elegida
        byte[] digestOfPassword = md.digest(secretKey.getBytes("utf-8"));
        byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
        SecretKey key = new SecretKeySpec(keyBytes, "DESede"); //Crea la clave
        Cipher cipher = Cipher.getInstance("DESede");
        cipher.init(Cipher.ENCRYPT_MODE, key);//Inicializa el cifrado con la clave
        byte[] plainTextBytes = texto.getBytes("utf-8");
        byte[] buf = cipher.doFinal(plainTextBytes);//Cifra el texto
        byte[] base64Bytes = Base64.encodeBase64(buf);//Encodea el texto en base64
        base64EncryptedString = new String(base64Bytes);
    } catch (Exception ex) {
    }
    return base64EncryptedString;
}

From source file:Main.java

public static byte[] computeSHA1(ByteBuffer convertme, int offset, int len) {
    int oldp = convertme.position();
    int oldl = convertme.limit();
    try {//from  ww w .  j av a  2 s . c  om
        MessageDigest md = MessageDigest.getInstance("SHA-1");
        convertme.position(offset);
        convertme.limit(len);
        md.update(convertme);
        return md.digest();
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        convertme.limit(oldl);
        convertme.position(oldp);
    }
    return new byte[20];
}

From source file:Main.java

public static String digest(InputStream in) throws Exception {
    MessageDigest messageDigest = null;
    XMLInputFactory inputFactory = XMLInputFactory.newFactory();
    messageDigest = MessageDigest.getInstance("MD5");
    XMLEventReader eventReader = inputFactory.createXMLEventReader(in);
    while (eventReader.hasNext()) {
        XMLEvent event = eventReader.nextEvent();

        if (event.isStartElement()) {
            messageDigest.update(event.asStartElement().getName().toString().getBytes());
        } else if (event.isEndElement()) {
            messageDigest.update(event.asEndElement().getName().toString().getBytes());
        }//from  w ww  .  jav a2  s .c o m
    }
    StringBuffer result = new StringBuffer();
    byte[] digest = messageDigest.digest();
    for (byte b : digest) {
        result.append(Integer.toString((b & 0xff) + 0x100, 16).substring(1));
    }
    return result.toString();
}

From source file:Main.java

public static String getHashKey(Context context) {
    // Add code to print out the key hash
    try {/*from  w  ww  . j av a  2  s. c  o m*/
        PackageInfo info = context.getPackageManager().getPackageInfo(context.getPackageName(),
                PackageManager.GET_SIGNATURES);
        for (Signature signature : info.signatures) {
            MessageDigest md = MessageDigest.getInstance("SHA");
            md.update(signature.toByteArray());
            return Base64.encodeToString(md.digest(), Base64.DEFAULT);
        }
    } catch (NameNotFoundException e) {

    } catch (NoSuchAlgorithmException e) {

    }
    return null;
}