Пример #1
0
  /**
   * Encrypts or decrypts the given input.
   *
   * @param in input
   * @param s encryption type
   * @param k secret key
   * @param a encryption algorithm
   * @param ec encrypt or decrypt
   * @return encrypted or decrypted input
   * @throws QueryException query exception
   */
  Str encryption(final byte[] in, final byte[] s, final byte[] k, final byte[] a, final boolean ec)
      throws QueryException {

    final boolean symmetric = eq(lc(s), SYM) || s.length == 0;
    final byte[] aa = a.length == 0 ? DES : a;
    final byte[] tivl = ALGE.get(lc(aa));
    if (!symmetric) throw CX_ENCTYP.get(info, ec);
    if (tivl == null) throw CX_INVALGO.get(info, s);
    // initialization vector length
    final int ivl = toInt(tivl);

    try {
      return Str.get(ec ? encrypt(in, k, aa, ivl) : decrypt(in, k, aa, ivl));
    } catch (final NoSuchPaddingException e) {
      throw CX_NOPAD.get(info, e);
    } catch (final BadPaddingException e) {
      throw CX_BADPAD.get(info, e);
    } catch (final InvalidKeyException e) {
      throw CX_KEYINV.get(info, e);
    } catch (final IllegalBlockSizeException e) {
      throw CX_ILLBLO.get(info, e);
    } catch (final GeneralSecurityException e) {
      throw CX_INVALGO.get(info, e);
    }
  }
Пример #2
0
  /**
   * Creates a message authentication code (MAC) for the given input.
   *
   * @param msg input
   * @param k secret key
   * @param a encryption algorithm
   * @param enc encoding
   * @return MAC
   * @throws QueryException query exception
   */
  Item hmac(final byte[] msg, final byte[] k, final byte[] a, final byte[] enc)
      throws QueryException {

    // create hash value from input message
    final Key key = new SecretKeySpec(k, string(a));

    final byte[] aa = a.length == 0 ? DEFA : a;
    if (!ALGHMAC.contains(lc(aa))) throw CX_INVHASH.get(info, aa);

    final boolean b64 = eq(lc(enc), BASE64) || enc.length == 0;
    if (!b64 && !eq(lc(enc), HEX)) throw CX_ENC.get(info, enc);

    try {
      final Mac mac = Mac.getInstance(string(ALGHMAC.get(lc(aa))));
      mac.init(key);
      final byte[] hash = mac.doFinal(msg);
      // convert to specified encoding, base64 as a standard, else use hex
      return Str.get(b64 ? org.basex.util.Base64.encode(hash) : hex(hash, true));
    } catch (final NoSuchAlgorithmException e) {
      throw CX_INVHASH.get(info, e);
    } catch (final InvalidKeyException e) {
      throw CX_KEYINV.get(info, e);
    }
  }