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:ar.gob.ambiente.servicios.gestionpersonas.entidades.util.CriptPass.java

/**
 * Mtodo para encriptar las contraseas//from w w w  .j ava 2  s .c  o m
 * @param texto
 * @return 
 */
public static String encriptar(String texto) {

    String secretKey = "zorbazorbas"; //llave para encriptar datos
    String base64EncryptedString = "";

    try {

        MessageDigest md = MessageDigest.getInstance("MD5");
        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);
        base64EncryptedString = new String(base64Bytes);

    } catch (NoSuchAlgorithmException | UnsupportedEncodingException | NoSuchPaddingException
            | InvalidKeyException | IllegalBlockSizeException | BadPaddingException ex) {
        System.out.println(ex.getMessage());
    }
    return base64EncryptedString;
}

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From source file:com.example.license.DESUtil.java

/**
 * ?/*from  w  ww  .  java2 s.  c  o  m*/
 * 
 * @param data
 *            ?
 * @param key
 *            
 * @return ??
 */
public static String decrypt(String data, String key) throws Exception {
    Key deskey = keyGenerator(key);
    Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
    // ?Cipher?
    cipher.init(Cipher.DECRYPT_MODE, deskey);
    // ?
    return new String(cipher.doFinal(Base64.decodeBase64(data)));
}

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From source file:de.uzk.hki.da.utils.PasswordUtils.java

public static String decryptPassword(String password) {

    byte key[] = "394z57f4".getBytes();
    byte decryptedPassword[];

    try {//  w w  w .  j  a  va2s  .co  m
        SecretKey secretKey = SecretKeyFactory.getInstance("DES").generateSecret(new DESKeySpec(key));
        Cipher decrypt = Cipher.getInstance("DES/CBC/PKCS5Padding");
        decrypt.init(Cipher.DECRYPT_MODE, secretKey,
                new IvParameterSpec(new byte[] { 0x01, 0x02, 0x04, 0x10, 0x01, 0x02, 0x04, 0x10 }));
        decryptedPassword = decrypt.doFinal(Base64.decodeBase64(password.getBytes()));

    } catch (GeneralSecurityException e) {
        throw new RuntimeException("Couldn't decrypt password " + password + e);
    }

    return new String(decryptedPassword);
}

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From source file:eml.studio.shared.util.Aes.java

/** 
 * Aes Decryption//from  ww  w. j a v  a 2  s.  com
 * 
 * @param encryptBytes byte[] to be decrypted
 * @param decryptKey decryption key 
 * @return 
 * @throws Exception 
 */
public static String aesDecryptByBytes(byte[] encryptBytes, String decryptKey) throws Exception {
    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    kgen.init(128);

    Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
    cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(decryptKey.getBytes(), "AES"));
    byte[] decryptBytes = cipher.doFinal(encryptBytes);
    return new String(decryptBytes);
}

---

From source file:com.hybris.mobile.lib.commerce.helper.SecurityHelper.java

/**
 * Decrypt secure String associated to the key
 *
 * @param value The value to decrypt/* w w w  . j  a v  a 2s  .  c  o  m*/
 * @return decrypted string
 */
public static String decrypt(String value) {
    String decryptedText = "";
    try {
        if (StringUtils.isNotBlank(value)) {
            Cipher cipher = Cipher.getInstance(CIPHER);
            cipher.init(Cipher.DECRYPT_MODE, mSecretKeySpec, mIvParameterSpec);
            decryptedText = new String(cipher.doFinal(Base64.decode(value, Base64.NO_CLOSE)), ENCODING);
            return decryptedText;
        }
    } catch (NoSuchAlgorithmException e) {
        Log.e(TAG, "Algorithm not found.");
    } catch (NoSuchPaddingException | IllegalBlockSizeException | BadPaddingException e) {
        Log.e(TAG, "Exception during decrypt");
    } catch (InvalidKeyException e) {
        Log.e(TAG, "No valid key provided.");
    } catch (InvalidAlgorithmParameterException e) {
        Log.e(TAG, "Algorithm parameter specification is invalid");
    } catch (UnsupportedEncodingException e) {
        Log.e(TAG, "Character to convert is unavailable");
    }

    return decryptedText;
}

---

From source file:com.vmware.fdmsecprotomgmt.PasswdEncrypter.java

/**
 * Encrypt the value with key provided/*from  ww w  . j  a v  a  2  s  .  co m*/
 */
private static String encrypt(String key, String value) {
    String encryptedString = null;
    try {
        IvParameterSpec iv = new IvParameterSpec(INIT_VECTOR.getBytes("UTF-8"));
        SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes("UTF-8"), "AES");

        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);

        byte[] encrypted = cipher.doFinal(value.getBytes());
        encryptedString = Base64.encodeBase64String(encrypted);
    } catch (Exception ex) {
        System.out.println("Caught exception while encrypting string : " + value);
        ex.printStackTrace();
    }

    return encryptedString;
}

---

From source file:com.credomatic.gprod.db2query2csv.Security.java

/**
 * Descifra una cadena de caracteres apartir de la llave de cifrado y retorna le valor original.
 * @param key llave generada durante el cifrado de la cadena original
 * @param value cadena cifrda//from   w  ww  .j  a va  2s  . c  o  m
 * @return cadena descifrada
 */
public static String decrypt(String key, String value) {
    try {
        Key k = new SecretKeySpec(new Base64().decode(key), "AES");
        Cipher c = Cipher.getInstance("AES");
        c.init(Cipher.DECRYPT_MODE, k);
        byte[] decodedValue = new Base64().decode(value);
        byte[] decValue = c.doFinal(decodedValue);
        String decryptedValue = new String(decValue);
        return decryptedValue;
    } catch (NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException | IllegalBlockSizeException
            | BadPaddingException ex) {
        Logger.getLogger(Security.class.getName()).log(Level.SEVERE, null, ex);
    }
    return null;
}

---

From source file:com.hybris.mobile.lib.commerce.helper.SecurityHelper.java

/**
 * Encrypt String associated with a key//from w w  w.  j a  v a2s  . co  m
 *
 * @param value The value to encrypt
 * @return encrypted string
 */
public static String encrypt(String value) {
    if (StringUtils.isBlank(value)) {
        throw new IllegalArgumentException();
    }

    String encryptedText = "";

    try {
        Cipher cipher = Cipher.getInstance(CIPHER);
        cipher.init(Cipher.ENCRYPT_MODE, mSecretKeySpec, mIvParameterSpec);
        encryptedText = Base64.encodeToString(cipher.doFinal(value.getBytes()), Base64.NO_CLOSE);
    } catch (NoSuchAlgorithmException e) {
        Log.e(TAG, "Algorithm not found.");
    } catch (NoSuchPaddingException | BadPaddingException | IllegalBlockSizeException e) {
        Log.e(TAG, "Exception during encrypt");
    } catch (InvalidKeyException e) {
        Log.e(TAG, "No valid key provided.");
    } catch (InvalidAlgorithmParameterException e) {
        Log.e(TAG, "Algorithm parameter specification is invalid");
    }

    return encryptedText;
}

---

From source file:Main.java

/**
 * More flexible AES encrypt that doesn't encode
 * @param key AES key typically 128, 192 or 256 bit
 * @param iv Initiation Vector//from  w w  w  .  ja  v a2  s  .  c  o  m
 * @param message in bytes (assumed it's already been decoded)
 * @return Encrypted cipher text (not encoded)
 * @throws GeneralSecurityException if something goes wrong during encryption
 */
public static byte[] encrypt(final SecretKeySpec key, final byte[] iv, final byte[] message)
        throws GeneralSecurityException {
    final Cipher cipher = Cipher.getInstance(AES_MODE);
    //IvParameterSpec ivSpec = new IvParameterSpec(iv);
    cipher.init(Cipher.ENCRYPT_MODE, key);
    byte[] cipherText = cipher.doFinal(message);

    log("cipherText", cipherText);

    return cipherText;
}

---

From source file:clases.Seguridad.java

public static String encriptar(String cleartext) throws Exception {
    Cipher cipher = Cipher.getInstance(CI);
    SecretKeySpec skeySpec = new SecretKeySpec(KEY.getBytes(), ALG);
    IvParameterSpec ivParameterSpec = new IvParameterSpec(IV.getBytes());
    cipher.init(Cipher.ENCRYPT_MODE, skeySpec, ivParameterSpec);
    byte[] encrypted = cipher.doFinal(cleartext.getBytes());
    return new String(encodeBase64(encrypted));
}

---

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