コード例 #1
0
  @PostConstruct
  public void init() {
    try {
      keySpec = new DESedeKeySpec(passphrase.getBytes("UTF8"));
      keyFactory = SecretKeyFactory.getInstance("DESede");
      secretKey = keyFactory.generateSecret(keySpec);

      encipher = Cipher.getInstance("DESede/ECB/PKCS5Padding");
      encipher.init(Cipher.ENCRYPT_MODE, secretKey);
      decipher = Cipher.getInstance("DESede/ECB/PKCS5Padding");
      decipher.init(Cipher.DECRYPT_MODE, secretKey);
    } catch (Exception e) {
      logger.fatal("Unable to initialize EncryptedType - " + e);
    }
  }
コード例 #2
0
@Converter
public class EncryptionProvider implements AttributeConverter<String, String> {
  private static final String passphrase = "lv84g@Kt3d*B9kls0f;?235f";
  protected LoggerProxy logger = LoggerProxy.getLogger(getClass());
  private SecretKeyFactory keyFactory;
  private DESedeKeySpec keySpec;
  private SecretKey secretKey;

  private Cipher encipher;
  private Cipher decipher;

  /** */
  public EncryptionProvider() {
    //
    // Default constructor.
    //
    super();
  }

  /**
   * @param rawValue
   * @param encryptedValue
   * @return
   */
  public boolean compareValues(String rawValue, String encryptedValue) {
    boolean same = false;
    String decrypted;

    if (rawValue == null && encryptedValue == null) {
      same = true;
    } else if ((rawValue != null && encryptedValue == null)
        || (rawValue == null && encryptedValue != null)) {
      same = false;
    } else if (rawValue != null && encryptedValue != null) {
      decrypted = decrypt(encryptedValue);
      same = rawValue.equals(decrypted);
    }

    return same;
  }

  @PostConstruct
  public void init() {
    try {
      keySpec = new DESedeKeySpec(passphrase.getBytes("UTF8"));
      keyFactory = SecretKeyFactory.getInstance("DESede");
      secretKey = keyFactory.generateSecret(keySpec);

      encipher = Cipher.getInstance("DESede/ECB/PKCS5Padding");
      encipher.init(Cipher.ENCRYPT_MODE, secretKey);
      decipher = Cipher.getInstance("DESede/ECB/PKCS5Padding");
      decipher.init(Cipher.DECRYPT_MODE, secretKey);
    } catch (Exception e) {
      logger.fatal("Unable to initialize EncryptedType - " + e);
    }
  }

  /**
   * Translate a byte array to a hex string. Note that 'odd length' values are not supported.
   *
   * @param bytes Source byte array.
   * @return Hexadecimal string representation of byte array.
   */
  protected String bytesToHexString(byte[] bytes) {
    final char hexTbl[];
    char hexBuf[];

    hexTbl = "0123456789ABCDEF".toCharArray();

    //
    // Translate two nibbles at a time until all nibbles have been
    // translated or there is only one nibble left.
    //
    hexBuf = new char[bytes.length * 2];
    for (int i = 0; i < bytes.length; i++) {
      hexBuf[i * 2] = hexTbl[(bytes[i] & 0xf0) >> 4];
      hexBuf[(i * 2) + 1] = hexTbl[(bytes[i] & 0x0f)];
    }

    return new String(hexBuf);
  }

  /**
   * Translate a hex string to a byte array.
   *
   * @param hexStr Source hex string.
   * @return Byte array. If the source hex string is not valid, then null is returned.
   */
  protected byte[] hexStringToBytes(String hexStr) {
    byte[] retval;
    int val;

    //
    //  hex string must contain 'chunks' of byte values
    //
    if (hexStr.length() % 2 != 0) {
      return null;
    }

    //
    //  convert string
    //
    retval = new byte[hexStr.length() / 2];
    try {
      for (int i = 0; i < retval.length; i++) {
        val = Integer.parseInt(hexStr.substring((i * 2), ((i * 2) + 2)), 16);
        retval[i] = 0;
        retval[i] |= val;
      }
    } catch (NumberFormatException e) {
      return null;
    }

    return retval;
  }

  /**
   * decrypt
   *
   * <p>Perform decryption.
   *
   * @param encryptedStr Data to be decrypted.
   * @return Decrypted data.
   */
  public String decrypt(String encryptedStr) {
    byte[] encryptedBytes;
    byte[] decryptedBytes = null;
    String value;

    try {
      encryptedBytes = hexStringToBytes(encryptedStr);
      decryptedBytes = decipher.doFinal(encryptedBytes);
      value = new String(decryptedBytes);
    } catch (Exception e) {
      //
      // Throw exception.
      //
      e.printStackTrace();
      throw CypherException.create(
          logger,
          "Decryption failed",
          e,
          "decrypt",
          EncryptionProvider.class,
          CypherException.PASSWORD_DECRYPT);
    }

    return value;
  }

  /**
   * encrypt
   *
   * <p>Perform encryption.
   *
   * @param clearStr Data to be encrypted.
   * @return Encrypted data.
   */
  public String encrypt(String clearStr) {
    byte[] encryptedBytes = null;
    String value;

    try {
      encryptedBytes = encipher.doFinal(clearStr.getBytes("UTF8"));
      value = bytesToHexString(encryptedBytes);
    } catch (Exception e) {
      //
      // Throw exception.
      //
      throw CypherException.create(
          logger,
          "Encryption failed",
          e,
          "encrypt",
          EncryptionProvider.class,
          CypherException.PASSWORD_ENCRYPT);
    }

    return value;
  }

  @Override
  public String convertToDatabaseColumn(String attribute) {
    init();
    return encrypt(attribute);
  }

  @Override
  public String convertToEntityAttribute(String dbData) {
    init();
    return decrypt(dbData);
  }
}