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:MainClass.java

private static byte[] passwordEncrypt(char[] password, byte[] plaintext) throws Exception {
    int MD5_ITERATIONS = 1000;
    byte[] salt = new byte[8];
    SecureRandom random = new SecureRandom();
    random.nextBytes(salt);// ww  w. jav a 2 s  . co  m

    PBEKeySpec keySpec = new PBEKeySpec(password);
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("PBEWithSHAAndTwofish-CBC");
    SecretKey key = keyFactory.generateSecret(keySpec);
    PBEParameterSpec paramSpec = new PBEParameterSpec(salt, MD5_ITERATIONS);
    Cipher cipher = Cipher.getInstance("PBEWithSHAAndTwofish-CBC");
    cipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);

    byte[] ciphertext = cipher.doFinal(plaintext);

    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    baos.write(salt);
    baos.write(ciphertext);
    return baos.toByteArray();
}

From source file:Main.java

public static byte[] des3EncodeECB(byte[] key, byte[] data) throws Exception {

    Key deskey = null;//from  ww w  .jav a 2 s.  c o m
    DESedeKeySpec spec = new DESedeKeySpec(key);
    SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
    deskey = keyfactory.generateSecret(spec);

    Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding");

    cipher.init(Cipher.ENCRYPT_MODE, deskey);
    byte[] bOut = cipher.doFinal(data);

    return bOut;
}

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

public static byte[] Decrypt(byte[] strBytes) {
    try {/*from   w  w  w .j  a  va  2 s.  co  m*/
        Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, convertSecretKey);
        byte[] result = cipher.doFinal(strBytes);
        return result;
    } catch (Exception e) {
        return null;
    }
}

From source file:EncDec.AES.java

public static String encrypt(String key, String initVector, String value) {
    try {/*  w  w  w .  j  a  v a  2s  .co m*/
        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());
        //System.out.println("encrypted string: "
        //        + Base64.encodeBase64String(encrypted));

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

    return null;
}

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:com.dragoniade.encrypt.EncryptionHelper.java

public static void encrypt(Properties p, String seedKey, String key) {
    String value = p.getProperty(key);
    String seed = p.getProperty(seedKey, seedKey);

    String encrypted;/*from  w ww . j a v  a 2  s . c  om*/
    try {
        Cipher cipher = getEncrypter(seed);
        byte[] result = cipher.doFinal(value.getBytes("UTF-16"));
        encrypted = cipher.getAlgorithm() + "{" + Base64.encode(result) + "}";
    } catch (Exception e) {
        try {
            encrypted = "{" + Base64.encode(value.getBytes("UTF-16")) + "}";
        } catch (Exception e2) {
            encrypted = "{" + Base64.encode(value.getBytes()) + "}";
        }
    }

    p.setProperty(key, encrypted);
}

From source file:com.lwr.software.reporter.utils.EncryptionUtil.java

public static String decrypt(String encrypted) {
    try {//  ww  w .j a va  2 s  .co  m
        IvParameterSpec iv = new IvParameterSpec(
                DashboardConstants.INIT_VECTOR.getBytes(DashboardConstants.ENCODING));
        SecretKeySpec skeySpec = new SecretKeySpec(
                DashboardConstants.INIT_KEY.getBytes(DashboardConstants.ENCODING),
                DashboardConstants.ALGORITHM);
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
        cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
        byte[] original = cipher.doFinal(Base64.decodeBase64(encrypted));
        return new String(original);
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    return null;
}

From source file:Main.java

private static byte[] decrypt(byte[] key, byte[] encrypted) throws Exception {
    SecretKeySpec skeySpec = new SecretKeySpec(key, "AES");
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.DECRYPT_MODE, skeySpec, new IvParameterSpec(new byte[cipher.getBlockSize()]));
    return cipher.doFinal(encrypted);
}

From source file:Main.java

private static byte[] encrypt(byte[] key, byte[] clear) throws Exception {
    SecretKeySpec skeySpec = new SecretKeySpec(key, "AES");
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.ENCRYPT_MODE, skeySpec, new IvParameterSpec(new byte[cipher.getBlockSize()]));
    return cipher.doFinal(clear);
}

From source file:Main.java

public static byte[] ees3DecodeECB(byte[] key, byte[] data) throws Exception {

    Key deskey = null;//w ww  .ja va  2s .  c  o  m
    DESedeKeySpec spec = new DESedeKeySpec(key);
    SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
    deskey = keyfactory.generateSecret(spec);

    Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding");

    cipher.init(Cipher.DECRYPT_MODE, deskey);

    byte[] bOut = cipher.doFinal(data);

    return bOut;

}