Example usage for javax.crypto Cipher 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:JavaTron.JTP.java

/**
 * Decrypts an encrypted string/*from  w w w.  j  av a2s . c o  m*/
 * @param property
 * @return A plaintext string
 */
public static String decrypt(String property) {
    String p = new String();
    try {
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("PBEWithMD5AndDES");
        SecretKey key = keyFactory.generateSecret(new PBEKeySpec(PASSWORD));
        Cipher pbeCipher = Cipher.getInstance("PBEWithMD5AndDES");
        pbeCipher.init(Cipher.DECRYPT_MODE, key, new PBEParameterSpec(SALT, 20));
        p = new String(pbeCipher.doFinal(base64Decode(property)));
    } catch (Exception e) {
        e.printStackTrace();
    }
    return p;
}

From source file:JavaTron.JTP.java

/**
 * Encrypts a string/*from  ww w. j  av  a2  s.  c o m*/
 * @param property
 * @return An encrypted string
 */
public static String encrypt(String property) {
    String p = new String();
    try {
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("PBEWithMD5AndDES");
        SecretKey key = keyFactory.generateSecret(new PBEKeySpec(PASSWORD));
        Cipher pbeCipher = Cipher.getInstance("PBEWithMD5AndDES");
        pbeCipher.init(Cipher.ENCRYPT_MODE, key, new PBEParameterSpec(SALT, 20));
        p = base64Encode(pbeCipher.doFinal(property.getBytes()));
    } catch (Exception e) {
        e.printStackTrace();
    }
    return p;
}

From source file:Main.java

private static CharSequence decryptText(String ciphertextString, Cipher cipher) {
    byte[] ciphertext = hexStringToBytes(ciphertextString);
    byte[] plaintext = {};

    //can't decrypt an empty string...exceptions gallore
    if (ciphertextString.length() == 0)
        return (CharSequence) ciphertextString;

    try {// w  w w.  j a va 2 s  .  com
        plaintext = cipher.doFinal(ciphertext);
    } catch (Exception e) {
        Log.d(LOG_TAG, "decryptText", e);
    }

    //TODO: dont' convert to string as interim...insecure
    return (CharSequence) (new String(plaintext));
}

From source file:clases.Seguridad.java

public static String desencriptar(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:de.extra.client.plugins.outputplugin.crypto.ExtraCryptoUtil.java

/** Decrypts the specified encrypted string, using the specified secret key. */
private static String decrypt(String sName, String secretKey) {
    if (secretKey == null) {
        secretKey = SYM_KEY_STR;//from  w  w  w.  j  a  v a2s . c o m
    }

    if (sName == null || sName.equals("")) {
        return "";
    }

    String sText = "";
    try {
        SecretKeySpec skeySpec = decodeKey(secretKey);
        Cipher decryptCipher = Cipher.getInstance(TRANSFORMATION);
        decryptCipher.init(Cipher.DECRYPT_MODE, skeySpec);

        byte[] encpArr = new Base64().decode(sName.trim());

        byte[] plainText = decryptCipher.doFinal(encpArr);

        sText = new String(plainText, CHARSET);
    } catch (Exception e) {
        e.printStackTrace(System.err);
    }

    return sText;
}

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:gsn.http.ac.Protector.java

public static String encrypt(String value) throws Exception {
    logger.debug("Encrypt key");
    Key key = generateKey();/*from ww w.j a v a  2s  . com*/
    String salt = getSalt();
    Cipher c = Cipher.getInstance(ALGORITHM);
    c.init(Cipher.ENCRYPT_MODE, key);

    String valueToEnc = null;
    String eValue = value;
    for (int i = 0; i < ITERATIONS; i++) {
        valueToEnc = salt + eValue;
        byte[] encValue = c.doFinal(valueToEnc.getBytes());
        eValue = new sun.misc.BASE64Encoder().encode(encValue);
        //eValue = Base64.encodeBase64String(encValue);
    }
    return eValue;
}

From source file:Main.java

public static byte[] getDecCode(byte[] byteD, String seed) {
    byte[] byteFina = null;
    Cipher cipher = null;

    try {/*from   www. j  a v a 2 s.  c o  m*/
        SecretKeySpec skeySpec = new SecretKeySpec(getRawKey(seed.getBytes()), "AES");
        cipher = Cipher.getInstance("AES/CFB/NoPadding");
        cipher.init(Cipher.DECRYPT_MODE, skeySpec, new IvParameterSpec(new byte[cipher.getBlockSize()]));
        byteFina = cipher.doFinal(byteD);
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        cipher = null;
    }

    return byteFina;
}

From source file:com.cherong.mock.common.base.util.EncryptionUtil.java

/**
 * des//from  ww  w  .j av  a 2s.c om
 * 
 * @param content
 * @param key
 * @return
 * @throws Exception
 */
public static String decryptByDES(byte[] content, String key) {
    try {
        DESKeySpec desKS = new DESKeySpec(key.getBytes());
        SecretKeyFactory skf = SecretKeyFactory.getInstance("DES");
        SecretKey sk = skf.generateSecret(desKS);
        Cipher cip = Cipher.getInstance(DES_CIPHER_ALGORITHM);
        cip.init(Cipher.DECRYPT_MODE, sk);
        byte[] result = cip.doFinal(content);
        return new String(result);
    } catch (Exception e) {
        LOGGER.error("{}", e);
        return null;
    }
}

From source file:com.liferay.util.Encryptor.java

public static String encrypt(Key key, String plainText) throws EncryptorException {

    try {/*from w  w  w  .  jav a  2  s.c om*/
        Security.addProvider(getProvider());

        Cipher cipher = Cipher.getInstance(key.getAlgorithm());
        cipher.init(Cipher.ENCRYPT_MODE, key);

        byte[] decryptedBytes = plainText.getBytes(ENCODING);
        byte[] encryptedBytes = cipher.doFinal(decryptedBytes);

        String encryptedString = Base64.encode(encryptedBytes);

        return encryptedString;
    } catch (Exception e) {
        throw new EncryptorException(e);
    }
}