Example usage for javax.crypto.spec IvParameterSpec IvParameterSpec

List of usage examples for javax.crypto.spec IvParameterSpec IvParameterSpec

  1. HOME
  2. Java
  3. javax
  4. javax.crypto.spec.*
  5. IvParameterSpec
  6. IvParameterSpec

Introduction

In this page you can find the example usage for javax.crypto.spec IvParameterSpec IvParameterSpec.

Prototype

public IvParameterSpec(byte[] iv)

Source Link

Document

Creates an IvParameterSpec object using the bytes in iv as the IV.

Usage

From source file:org.bigmouth.nvwa.utils.degist.DesUtils.java

public static String encrypt(String content, String key, byte[] iv) {
    try {/*www . j  av a2 s  .c  o  m*/
        if (StringUtils.length(key) != 8) {
            throw new IllegalArgumentException("Key must be 8 byte");
        }
        SecretKeySpec secretkey = new SecretKeySpec(key.getBytes(), "DES");
        IvParameterSpec zeroIv = new IvParameterSpec(iv);
        Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, secretkey, zeroIv);
        byte[] encryptedData = cipher.doFinal(content.getBytes());
        return Base64.encodeBase64String(encryptedData);
    } catch (Exception e) {
        LOGGER.error("encrypt:", e);
        return null;
    }
}

From source file:org.cifssynchronizer.core.Security.java

public static String decrypt(String key1, String key2, String encrypted) {
    String str = null;/*from  ww w. j a  va 2  s . c  om*/
    try {
        IvParameterSpec iv = new IvParameterSpec(key2.getBytes("UTF-8"));
        SecretKeySpec skeySpec = new SecretKeySpec(key1.getBytes("UTF-8"), "AES");
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
        cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
        byte[] original = cipher.doFinal(Base64.decodeBase64(encrypted));

        str = new String(original);
    } catch (Exception ignored) {
    }

    return str;
}

From source file:edu.wright.cs.sp16.ceg3120.util.PasswordEncryptionUtility.java

/**
 * Encrypts a given string using AES./*  w w  w .ja v  a 2s.c om*/
 * 
 * @param value
 *            // String to encrypt.
 * @return // Returns encrypted string.
 */
public static String encrypt(String value) {
    try {
        IvParameterSpec iv = new IvParameterSpec(initVector.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("UTF-8"));
        System.out.println("encrypted string: " + Base64.encodeBase64String(encrypted));

        return Base64.encodeBase64String(encrypted);
    } catch (RuntimeException e) {
        throw e;
    } catch (Exception ex) {
        ex.printStackTrace();
    }

    return null;
}

From source file:Main.java

/**
 * Decrypts a encrypted and encoded message given a key.
 * @param cipherBytes// w  ww. j a  v  a2 s. co  m
 * @param key
 * @return
 * @throws NoSuchAlgorithmException
 * @throws NoSuchAlgorithmException
 * @throws InvalidAlgorithmParameterException
 * @throws IllegalBlockSizeException
 * @throws BadPaddingException
 * @throws InvalidAlgorithmParameterException
 * @throws NoSuchPaddingException
 * @throws InvalidKeyException
 */
public static byte[] decryptMessage(byte[] cipherBytes, SecretKey key) throws NoSuchAlgorithmException,
        NoSuchAlgorithmException, InvalidAlgorithmParameterException, IllegalBlockSizeException,
        BadPaddingException, InvalidAlgorithmParameterException, NoSuchPaddingException, InvalidKeyException {
    Cipher cipher = Cipher.getInstance("AES");
    //ipher cipher = Cipher.getInstance("AES/CBC/PKCS7PADDING");
    byte[] init = new byte[128 / 8];
    SecureRandom secureRandom = new SecureRandom();
    //secureRandom.nextBytes(init);
    for (int i = 0; i < 16; i++)
        init[i] = 0;
    cipher.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(init));
    byte[] textBytes = cipher.doFinal(cipherBytes);
    return textBytes;
}

From source file:Main.java

public static String encryptData(String password, String plaintextData) throws Exception {
    // Thank you Mr. Nelenkov
    String maybeThisHelps = "http://nelenkov.blogspot.com/2012/04/using-password-based-encryption-on.html";
    Log.v(TAG, maybeThisHelps);// w w w .  j av a 2  s  .  c  o m
    int iterationCount = 100; //because Polaroid
    int keyLength = 256;
    int saltLength = keyLength;

    SecureRandom random = new SecureRandom();
    byte[] salt = new byte[saltLength];
    random.nextBytes(salt);
    KeySpec keySpec = new PBEKeySpec(password.toCharArray(), salt, iterationCount, keyLength);
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
    byte[] keyBytes = keyFactory.generateSecret(keySpec).getEncoded();
    SecretKey key = new SecretKeySpec(keyBytes, "AES");

    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    byte[] iv = new byte[cipher.getBlockSize()];
    random.nextBytes(iv);

    IvParameterSpec ivParams = new IvParameterSpec(iv);
    cipher.init(Cipher.ENCRYPT_MODE, key, ivParams);
    byte[] ciphertext = cipher.doFinal(plaintextData.getBytes("UTF-8"));

    String ivToString = new String(Base64.encode(iv, 0));
    String saltToString = new String(Base64.encode(salt, 0));
    String ciphertextToString = new String(Base64.encode(ciphertext, 0));

    Log.d(TAG, ivToString + "]" + saltToString + "]" + ciphertextToString);
    return (ivToString + "]" + saltToString + "]" + ciphertextToString).replace("\n", "");
}

From source file:Logi.GSeries.Libraries.Encryption.java

public static String encrypt(String decryptedString, String password) {
    try {/*from   ww w . jav a 2 s . c  om*/
        // build the initialization vector (randomly).
        SecureRandom random = new SecureRandom();
        byte initialVector[] = new byte[16];
        //generate random 16 byte IV AES is always 16bytes
        random.nextBytes(initialVector);
        IvParameterSpec ivspec = new IvParameterSpec(initialVector);
        SecretKeySpec skeySpec = new SecretKeySpec(password.getBytes("UTF-8"), "AES");
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, ivspec);
        byte[] encrypted = cipher.doFinal(decryptedString.getBytes());
        byte[] encryptedWithIV = new byte[encrypted.length + initialVector.length];
        System.arraycopy(encrypted, 0, encryptedWithIV, 0, encrypted.length);
        System.arraycopy(initialVector, 0, encryptedWithIV, encrypted.length, initialVector.length);
        return Base64.encodeBase64String(encryptedWithIV);
    } catch (Exception ex) {
        Logger.getLogger(Encryption.class.getName()).log(Level.SEVERE, null, ex);
        return "Error";
    }
}

From source file:encrypt.algorithms.AESCBC.java

public String encrypt(String key1, String key2, String value) {
    try {// ww w  .  j av a  2 s  .co  m
        IvParameterSpec iv = new IvParameterSpec(key2.getBytes("UTF-8"));

        SecretKeySpec skeySpec = new SecretKeySpec(key1.getBytes("UTF-8"), "AES");
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
        byte[] encrypted = cipher.doFinal(value.getBytes());
        // System.out.println("encrypted string:"
        //       + Base64.encodeBase64String(encrypted));
        return Base64.encodeBase64String(encrypted);
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    return null;
}

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:cr.ac.uia.SistemaGC.utils.AES.java

public static String encrypt(Long cedula, String usuario, String contrasena) {
    //<editor-fold defaultstate="collapsed" desc="Mtodo para cifrar contraseas">
    /*// w ww  . ja  v a 2 s.  c  o  m
    * Inspirado en:
    * http://stackoverflow.com/questions/15554296/simple-java-aes-encrypt-decrypt-example
     */
    try {
        IvParameterSpec iv = new IvParameterSpec(fitString(usuario, 16).getBytes("UTF-8"));
        SecretKeySpec skeySpec = new SecretKeySpec(fitString(cedula.toString(), 16).getBytes("UTF-8"), "AES");
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
        byte[] encrypted = cipher.doFinal(contrasena.getBytes());
        return Base64.encodeBase64String(encrypted);
    } catch (UnsupportedEncodingException | NoSuchAlgorithmException | NoSuchPaddingException
            | InvalidKeyException | InvalidAlgorithmParameterException | IllegalBlockSizeException
            | BadPaddingException e) {
        e.printStackTrace();
        System.err.println(e.getClass().getName() + ": " + e.getMessage());
        System.exit(0);
    }
    return null;
    //</editor-fold>
}

From source file:Main.java

private static IvParameterSpec IvGenerator(byte[] b) {
    IvParameterSpec IV = new IvParameterSpec(b);
    return IV;
}