Example usage for javax.crypto Cipher getInstance

List of usage examples for javax.crypto Cipher getInstance

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Introduction

In this page you can find the example usage for javax.crypto Cipher getInstance.

Prototype

public static final Cipher getInstance(String transformation)
        throws NoSuchAlgorithmException, NoSuchPaddingException

Source Link

Document

Returns a Cipher object that implements the specified transformation.

Usage

From source file:Main.java

public static byte[] cipher(int mode, byte[] data, byte[] secret) throws NoSuchAlgorithmException,
        NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException {
    SecretKeySpec secretKeySpec = new SecretKeySpec(sha256(secret), "AES");
    Cipher c = Cipher.getInstance("AES");
    c.init(mode, secretKeySpec);/*from   w ww.j a v a  2s  . co m*/
    return c.doFinal(data);
}

From source file:com.juicioenlinea.application.secutiry.Security.java

public static String encriptar(String texto) {

    final String secretKey = "hunter"; //llave para encriptar datos
    String encryptedString = null;

    try {/*  w  w  w . j a v  a2 s. c o m*/

        MessageDigest md = MessageDigest.getInstance("SHA");
        byte[] digestOfPassword = md.digest(secretKey.getBytes("UTF-8"));
        byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);

        SecretKey key = new SecretKeySpec(keyBytes, "DESede");
        Cipher cipher = Cipher.getInstance("DESede");
        cipher.init(Cipher.ENCRYPT_MODE, key);

        byte[] plainTextBytes = texto.getBytes("UTF-8");
        byte[] buf = cipher.doFinal(plainTextBytes);
        byte[] base64Bytes = Base64.encodeBase64(buf);
        encryptedString = new String(base64Bytes);

    } catch (NoSuchAlgorithmException | UnsupportedEncodingException | NoSuchPaddingException
            | InvalidKeyException | IllegalBlockSizeException | BadPaddingException ex) {
        Logger.getLogger(Security.class.getName()).log(Level.SEVERE, null, ex);
    }
    return encryptedString;
}

From source file:com.doculibre.constellio.utils.aes.SimpleProtector.java

public static String encrypt(String valueToEnc) throws Exception {
    Key key = generateKey();/*w  ww .j  a v  a2 s.  c  o  m*/
    Cipher c = Cipher.getInstance(ALGORITHM);
    c.init(Cipher.ENCRYPT_MODE, key);
    byte[] encValue = c.doFinal(valueToEnc.getBytes());
    String encryptedValue = Base64.encodeBase64String(encValue);
    return encryptedValue;
}

From source file:com.avbravo.avbravoutils.crypto.Encriptador.java

public static String decrypt(String key, String encrypted) throws Exception {
    Cipher cipher = Cipher.getInstance(cI);
    SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes(), alg);
    IvParameterSpec ivParameterSpec = new IvParameterSpec(iv.getBytes());
    byte[] enc = decodeBase64(encrypted);
    cipher.init(Cipher.DECRYPT_MODE, skeySpec, ivParameterSpec);
    byte[] decrypted = cipher.doFinal(enc);
    return new String(decrypted);
}

From source file:Main.java

public static byte[] decipherAes256(byte[] encrypedPwdBytes, String password) throws NullPointerException {

    if (password == null || password.length() == 0) {
        throw new NullPointerException("Please give Password");
    }/*from  w w  w.j a  v a  2 s. c  o  m*/

    if (encrypedPwdBytes == null || encrypedPwdBytes.length <= 0) {
        throw new NullPointerException("Please give encrypedPwdBytes");
    }

    try {
        SecretKey key = getKey(password);

        // IMPORTANT TO GET SAME RESULTS ON iOS and ANDROID
        final byte[] iv = new byte[16];
        Arrays.fill(iv, (byte) 0x00);
        IvParameterSpec ivParameterSpec = new IvParameterSpec(iv);

        // cipher is not thread safe
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
        cipher.init(Cipher.DECRYPT_MODE, key, ivParameterSpec);
        byte[] decryptedValueBytes = (cipher.doFinal(encrypedPwdBytes));

        return decryptedValueBytes;

    } catch (InvalidKeyException e) {
        e.printStackTrace();
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (BadPaddingException e) {
        e.printStackTrace();
    } catch (NoSuchPaddingException e) {
        e.printStackTrace();
    } catch (IllegalBlockSizeException e) {
        e.printStackTrace();
    } catch (InvalidAlgorithmParameterException e) {
        e.printStackTrace();
    }
    return null;
}

From source file:com.fpt.crypto.CipherDemo.java

public static String decrypt(String in, String key) throws NoSuchAlgorithmException, NoSuchPaddingException,
        InvalidKeyException, IllegalBlockSizeException, BadPaddingException, DecoderException {
    Cipher cipher = Cipher.getInstance("AES");
    byte[] inputBytes = Hex.decodeHex(in.toCharArray());
    SecretKey secKey = new SecretKeySpec(key.getBytes(), "AES");
    cipher.init(Cipher.DECRYPT_MODE, secKey);
    byte[] outputBytes = cipher.doFinal(inputBytes);
    return new String(outputBytes);

}

From source file:com.java.demo.DesDemo.java

public static byte[] Encrypt(String str) {
    try {//from  w  ww  .j  a v  a 2s .c  o  m
        Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, convertSecretKey);
        byte[] result = cipher.doFinal(str.getBytes());
        return result;

    } catch (Exception e) {
        return null;
    }
}

From source file:de.fhdo.helper.DES.java

public static String encrypt(String Text) {
    try {/*from w  ww. ja v a2  s .  co  m*/
        DESKeySpec keySpec = new DESKeySpec("schluessel_stdrepository15".getBytes("UTF8"));
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
        SecretKey key = keyFactory.generateSecret(keySpec);

        // ENCODE plainTextPassword String
        byte[] cleartext = Text.getBytes("UTF8");
        Cipher cipher = Cipher.getInstance("DES");
        // cipher is not thread safe
        cipher.init(Cipher.ENCRYPT_MODE, key);
        return Base64.encodeBase64URLSafeString(cipher.doFinal(cleartext));

    } catch (Exception e) {
        e.printStackTrace();
    }

    return "";
}

From source file:D_common.E_ncript.java

public static byte[] encrypt(byte[] data, String keyStr) {
    try {//w  w  w.j  a  va  2  s  .com
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        final SecretKeySpec secretKey = new SecretKeySpec(makeAESKey(keyStr), "AES");
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        return cipher.doFinal(data);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

From source file:edu.tufts.vue.util.Encryption.java

public static String encrypt(String input) {
    try {//from  w w  w. j  av  a  2s  .co  m
        if (cipher == null)
            cipher = Cipher.getInstance(algorithm);
        cipher.init(Cipher.ENCRYPT_MODE, getKey());
        byte[] inputBytes = input.getBytes();
        byte[] outputBytes = cipher.doFinal(inputBytes);
        String output = new String(hex.encode(outputBytes));
        return output;
    } catch (Exception ex) {
        ex.printStackTrace();
        return input;
    }
}