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:com.vico.license.util.rsa.RSAdoDecrypt.java

public static String decrypt(String cryptograph) throws Exception {
    Key privateKey;/* w  w  w.ja  va  2s.c  o  m*/
    String path = Thread.currentThread().getContextClassLoader().getResource("/").toURI().getPath();
    ObjectInputStream ois = null;
    try {
        /** ? */
        ois = new ObjectInputStream(new FileInputStream(path + FileNames.PRIVATEKEY_NAME));
        privateKey = (Key) ois.readObject();
    } catch (Exception e) {
        throw e;
    } finally {
        ois.close();
    }

    /** Cipher?RSA */
    Cipher cipher = Cipher.getInstance(ALGORITHM);
    cipher.init(Cipher.DECRYPT_MODE, privateKey);

    /** ? */
    byte[] b1 = Base64.decodeBase64(cryptograph);
    /** ? */
    byte[] b = cipher.doFinal(b1);
    return new String(b);
}

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 .j  a va 2 s . co  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, ivSpec);
    byte[] cipherText = cipher.doFinal(message);

    log("cipherText", cipherText);

    return cipherText;
}

From source file:com.feedzai.commons.sql.abstraction.util.AESHelper.java

/**
 * Encrypts a string.//from   ww  w.j av  a 2 s  . com
 *
 * @param c The string to encrypt.
 * @return The encrypted string in HEX.
 */
public static String encrypt(String c, String key) {
    try {
        SecretKeySpec skeySpec = new SecretKeySpec(Hex.decodeHex(key.toCharArray()), "AES");
        Cipher cipher = Cipher.getInstance("AES");
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
        byte[] encoded = cipher.doFinal(c.getBytes());
        return new String(Hex.encodeHex(encoded));

    } catch (Exception e) {
        logger.warn("Could not encrypt string", e);
        return null;
    }
}

From source file:com.feedzai.commons.sql.abstraction.util.AESHelper.java

/**
 * Encrypts a byte[].//from   w  w w. ja  v  a  2  s.c  o m
 *
 * @param c   The byte[] to encrypt.
 * @param key The key.
 * @return The encrypted array as a HEX string.
 */
public static String encrypt(byte[] c, String key) {
    try {
        SecretKeySpec skeySpec = new SecretKeySpec(Hex.decodeHex(key.toCharArray()), "AES");
        Cipher cipher = Cipher.getInstance("AES");
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
        byte[] encoded = cipher.doFinal(c);
        return new String(Hex.encodeHex(encoded));

    } catch (Exception e) {
        logger.warn("Could not encrypt byte[]", e);
        return null;
    }
}

From source file:com.wms.studio.security.utils.Digests.java

public static byte[] desEncrypt(String pwd, byte[] key) throws Exception {
    // ?DESKeySpec
    DESKeySpec dks = new DESKeySpec(key);
    // ?DESKeySpec??SecretKey
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
    SecretKey securekey = keyFactory.generateSecret(dks);
    // Cipher??//from   w w w. ja  v  a  2s.co m
    Cipher cipher = Cipher.getInstance(DES);
    // ?Cipher
    cipher.init(Cipher.ENCRYPT_MODE, securekey, random);
    return cipher.doFinal(pwd.getBytes());
}

From source file:com.wms.studio.security.utils.Digests.java

public static byte[] desDecrypt(byte[] pwd, byte[] key) throws Exception {
    // ?DESKeySpec
    DESKeySpec dks = new DESKeySpec(key);
    // ?DESKeySpec??SecretKey
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
    SecretKey securekey = keyFactory.generateSecret(dks);
    // Cipher??/*from   w  w w  . j ava  2s .  co  m*/
    Cipher cipher = Cipher.getInstance(DES);
    // ?Cipher
    cipher.init(Cipher.DECRYPT_MODE, securekey, random);
    return cipher.doFinal(pwd);
}

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

/** 
 * Aes Encryption /*from ww  w.j a v  a2s. co m*/
 * @param content content to be encrypted
 * @param encryptKey encryption key
 * @return 
 * @throws Exception 
 */
public static byte[] aesEncryptToBytes(String content, String encryptKey) throws Exception {
    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    kgen.init(128);
    Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
    cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(encryptKey.getBytes(), "AES"));

    return cipher.doFinal(content.getBytes("utf-8"));
}

From source file:org.oscarehr.common.hl7.v2.oscar_to_oscar.SendingUtils.java

private static byte[] encryptEncryptionKey(SecretKey senderSecretKey, PublicKey receiverOscarKey)
        throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException,
        BadPaddingException {//ww  w  . j a  va 2s. c o  m
    Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
    cipher.init(Cipher.ENCRYPT_MODE, receiverOscarKey);
    return (cipher.doFinal(senderSecretKey.getEncoded()));
}

From source file:Main.java

public static String decryp(String key, String str) throws java.io.UnsupportedEncodingException,
        NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException,
        InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException {
    String aesKey;/*from  www .j a  va  2  s.c  om*/
    aesKey = key.substring(0, 16);
    Cipher c = Cipher.getInstance("AES/CBC/PKCS5Padding");
    c.init(Cipher.DECRYPT_MODE, AESkey(key), new IvParameterSpec(aesKey.getBytes("UTF-8")));

    byte[] byteStr = Base64.decode(str.getBytes(), 0);
    String deStr = new String(c.doFinal(byteStr), "UTF-8");

    return deStr;
}

From source file:Main.java

public static byte[] desEncrypt(byte[] data, String key) throws Exception {
    try {//ww w . j a va2s. co  m
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        byte[] base64Key = Base64.decode(key, Base64.DEFAULT);
        SecretKeySpec keyspec = new SecretKeySpec(base64Key, "AES");
        cipher.init(Cipher.DECRYPT_MODE, keyspec);
        byte[] original = cipher.doFinal(data);
        return original;
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
}