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:Main.java

static byte[] decryptRsaB64(String s64, Key privRsaKey) {
    try {/*from w  ww .  j  a v  a2  s  .  c  o  m*/
        byte[] sBytes = decodeB64(s64);
        if (sBytes != null) {
            Cipher cipher = Cipher.getInstance("RSA/None/PKCS1Padding", "SC");
            cipher.init(Cipher.DECRYPT_MODE, privRsaKey);
            return cipher.doFinal(sBytes);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

From source file:Main.java

/** 
 * decrypt //from  w  w  w.  j a  v  a 2  s.c  o m
 * @param data prepare to be decrypted 
 * @param key byteArray[] key
 * @return byte[] original data 
 * */
public static byte[] decrypt(byte[] data, byte[] key) throws Exception {

    Key k = byteArrayKeyToSecurityKey(key);

    Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
    //init, decrypt mode
    cipher.init(Cipher.DECRYPT_MODE, k);
    //exec 
    return cipher.doFinal(data);
}

From source file:com.wso2telco.cryptosystem.AESencrp.java

/**
 * Encrypt./*ww  w .j  a v a 2s .  c  o m*/
 *
 * @param Data the data
 * @return the string
 * @throws Exception the exception
 */
public static String encrypt(String Data) throws Exception {
    Key key = generateKey();
    Cipher c = Cipher.getInstance(ALGO);
    c.init(Cipher.ENCRYPT_MODE, key);
    byte[] encVal = c.doFinal(Data.getBytes());
    //String encryptedValue = new BASE64Encoder().encode(encVal);
    String encryptedValue = new String(Base64.encodeBase64(encVal));
    return encryptedValue;
}

From source file:Main.java

private static byte[] cryptBy3Des(byte input[], byte key[], int cryptModel, byte iv[]) throws Exception {
    try {/*from   www .  j  a va 2 s  .c  o  m*/
        Key k = KeyGenerator(key);
        IvParameterSpec IVSpec = iv != null ? IvGenerator(iv) : IvGenerator(defaultIV);
        Cipher c = Cipher.getInstance(desAlgorithm);
        c.init(cryptModel, k, ((java.security.spec.AlgorithmParameterSpec) (IVSpec)));
        return c.doFinal(input);
    } catch (Exception e) {
        throw e;
    }
}

From source file:Main.java

public static byte[] getRSAEncryptedData(byte[] dataWithHash) {
    BigInteger modulus = new BigInteger(
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
            16);//from   www . j a  v  a  2  s. c om
    BigInteger pubExp = new BigInteger("010001", 16);

    KeyFactory keyFactory = null;
    try {
        keyFactory = KeyFactory.getInstance("RSA");
        RSAPublicKeySpec pubKeySpec = new RSAPublicKeySpec(modulus, pubExp);
        RSAPublicKey key = (RSAPublicKey) keyFactory.generatePublic(pubKeySpec);

        Cipher cipher = Cipher.getInstance("RSA/ECB/NoPadding");
        cipher.init(Cipher.ENCRYPT_MODE, key);
        byte[] cipherData = cipher.doFinal(dataWithHash);
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
    } catch (IllegalBlockSizeException e) {
        e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
    } catch (InvalidKeyException e) {
        e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
    } catch (BadPaddingException e) {
        e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
    } catch (InvalidKeySpecException e) {
        e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
    } catch (NoSuchPaddingException e) {
        e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
    }
    return null;
}

From source file:com.tydic.dbp.utils.ThreeDesUtils.java

public static String decryptMode(String srcStr) {
    try {/*  ww  w . ja v  a2 s .  c  om*/
        // ?
        SecretKey deskey = new SecretKeySpec(keyBytes, Algorithm);
        // 
        Cipher c1 = Cipher.getInstance(Algorithm);
        c1.init(Cipher.DECRYPT_MODE, deskey);
        return new String(c1.doFinal(Hex.decodeHex(srcStr.toCharArray())));
    } catch (java.security.NoSuchAlgorithmException e1) {
        e1.printStackTrace();
    } catch (javax.crypto.NoSuchPaddingException e2) {
        e2.printStackTrace();
    } catch (java.lang.Exception e3) {
        e3.printStackTrace();
    }
    return null;
}

From source file:Main.java

private static byte[] getEncCode(String key, byte[] byteS) {
    byte[] byteFina = null;
    Cipher cipher;
    try {/*  w  w w  .j  a v  a2  s . c  o  m*/
        cipher = Cipher.getInstance("DES");
        cipher.init(Cipher.ENCRYPT_MODE, newDesInstance(key));
        byteFina = cipher.doFinal(byteS);
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        cipher = null;
    }
    return byteFina;
}

From source file:com.basp.trabajo_al_minuto.model.business.BusinessSecurity.java

/**
 * Se encarga de desencriptar la contrasea ingresada por el usuario *
 *//*  w ww.  j  a va  2s  . c  o  m*/
public static String decrypt(String encryptValue) throws BusinessException {
    String secretKey = "e-business";
    String base64EncryptedString = "";

    try {
        byte[] message = Base64.decodeBase64(encryptValue.getBytes("utf-8"));
        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 decipher = Cipher.getInstance("DESede");
        decipher.init(Cipher.DECRYPT_MODE, key);
        byte[] plainText = decipher.doFinal(message);
        base64EncryptedString = new String(plainText, "UTF-8");
    } catch (Exception ex) {
        throw new BusinessException(ex);
    }
    return base64EncryptedString;
}

From source file:Main.java

private static byte[] getEncCode(Context mContext, byte[] byteS) {
    byte[] byteFina = null;
    Cipher cipher;
    try {/*w ww  . j  a  va  2s  . c  o  m*/
        cipher = Cipher.getInstance("DES");
        cipher.init(Cipher.ENCRYPT_MODE, getKey(mContext));
        byteFina = cipher.doFinal(byteS);
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        cipher = null;
    }
    return byteFina;
}

From source file:Main.java

public static String encode(String key, String cleartext) throws Exception {
    SecretKeySpec secretKeySpec = createKey(key);
    IvParameterSpec ivSpec = new IvParameterSpec(HEX.getBytes());
    Cipher c = Cipher.getInstance("AES/CBC/PKCS5Padding");
    c.init(Cipher.ENCRYPT_MODE, secretKeySpec, ivSpec);
    String result = parseByte2HexStr(c.doFinal(cleartext.getBytes("UTF-8")));

    return result;
}