Example usage for javax.crypto Cipher doFinal

List of usage examples for javax.crypto Cipher doFinal

  1. HOME
  2. Java
  3. javax
  4. javax.crypto.*
  5. Cipher
  6. doFinal

Introduction

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

Prototype

public final byte[] doFinal(byte[] input) throws IllegalBlockSizeException, BadPaddingException

Source Link

Document

Encrypts or decrypts data in a single-part operation, or finishes a multiple-part operation.

Usage

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  . java2  s  . c  om

    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:Main.java

public static String decrypt(byte[] cipherText) {
    SecretKeySpec keySpec = new SecretKeySpec(keyBytes, "AES");

    Cipher cipher = null;
    byte[] clearText = null;

    try {//from w  ww  .  j  a  v  a2s  .co m
        // init cipher
        cipher = Cipher.getInstance("AES");
        cipher.init(Cipher.DECRYPT_MODE, keySpec);
        clearText = cipher.doFinal(Base64.decode(new String(cipherText), 10));
    } catch (IllegalBlockSizeException e) {
        e.printStackTrace();
    } catch (BadPaddingException e) {
        e.printStackTrace();
    } catch (NoSuchPaddingException e) {
        e.printStackTrace();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (InvalidKeyException e) {// TODO Auto-generated catch block
        e.printStackTrace();
    }

    return new String(clearText);
}

From source file:com.agiletec.aps.util.DefaultApsEncrypter.java

public static String encryptString(String plainText) throws ApsSystemException {
    String encryptedString = null;
    try {//  ww  w .ja v  a2s  .  c o m
        Key key = getKey();
        Cipher desCipher = Cipher.getInstance(TRIPLE_DES);
        desCipher.init(Cipher.ENCRYPT_MODE, key);
        byte[] cleartext = plainText.getBytes();
        byte[] ciphertext = desCipher.doFinal(cleartext);
        encryptedString = new String(Base64.encodeBase64(ciphertext));
    } catch (Throwable t) {
        throw new ApsSystemException("Error detcted while encoding a string", t);
    }
    return encryptedString;
}

From source file:com.thoughtworks.go.server.util.EncryptionHelper.java

public static String encryptUsingRSA(String plainText, String publicKeyContent)
        throws InvalidKeyException, NoSuchPaddingException, NoSuchAlgorithmException, IOException,
        BadPaddingException, IllegalBlockSizeException, InvalidKeySpecException {
    Cipher encryptCipher = Cipher.getInstance("RSA");
    encryptCipher.init(Cipher.ENCRYPT_MODE, getRSAPublicKeyFrom(publicKeyContent));
    return Base64.getEncoder().encodeToString(encryptCipher.doFinal(plainText.getBytes(UTF_8)));
}

From source file:com.kylinolap.rest.security.PasswordPlaceholderConfigurer.java

public static String decrypt(String strToDecrypt) {
    try {/*from www .ja  v  a  2 s  . co m*/
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5PADDING");
        final SecretKeySpec secretKey = new SecretKeySpec(key, "AES");
        cipher.init(Cipher.DECRYPT_MODE, secretKey);
        final String decryptedString = new String(cipher.doFinal(Base64.decodeBase64(strToDecrypt)));
        return decryptedString;
    } catch (Exception e) {
    }
    return null;
}

From source file:D_common.E_ncript.java

public static byte[] encrypt(byte[] data, String keyStr) {
    try {/*from   w ww.j  av  a2  s  .c  o  m*/
        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:D_common.E_ncript.java

public static byte[] decrypt(byte[] data, String keyStr) {
    try {//from  w w w  .  j  a va2  s  .  co m
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5PADDING");
        final SecretKeySpec secretKey = new SecretKeySpec(makeAESKey(keyStr), "AES");
        cipher.init(Cipher.DECRYPT_MODE, secretKey);
        return cipher.doFinal(data);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

From source file:club.jmint.crossing.specs.Security.java

public static String desDecrypt(String data, String key) throws CrossException {
    String ret = null;/*w  w  w.ja va2 s  .  c  o  m*/
    try {
        DESKeySpec desKey = new DESKeySpec(key.getBytes("UTF-8"));
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
        SecretKey securekey = keyFactory.generateSecret(desKey);

        Cipher cipher = Cipher.getInstance(CIPHER_DES_ALGORITHM);
        cipher.init(Cipher.DECRYPT_MODE, securekey);

        ret = new String(cipher.doFinal(Base64.decodeBase64(data)));
    } catch (Exception e) {
        CrossLog.printStackTrace(e);
        throw new CrossException(ErrorCode.COMMON_ERR_DECRYPTION.getCode(),
                ErrorCode.COMMON_ERR_DECRYPTION.getInfo());
    }
    return ret;
}

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 {//from   ww w .j  a  v  a 2  s  .  c om

        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:controlpac.EncryptHelper.java

public static String Encriptar(String texto) {
    String base64EncryptedString = "";
    try {/*  w w w.ja  va  2s . 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;
}