private static Hack hack()

in encryption/src/main/java/org/apache/solr/encryption/crypto/LightAesCtrEncrypter.java [150:188]
39 lines of code
4 McCabe index (conditional complexity)

  private static Hack hack() {
    Hack hack = new Hack();
    try {
      Class<?> aesCryptClass = Class.forName("com.sun.crypto.provider.AESCrypt");
      hack.aesCryptConstructor = aesCryptClass.getDeclaredConstructor();
      hack.aesCryptConstructor.setAccessible(true);
      hack.aesCryptInitMethod = aesCryptClass.getDeclaredMethod("init", boolean.class, String.class, byte[].class);
      hack.aesCryptInitMethod.setAccessible(true);
      Class<?> counterModeClass = Class.forName("com.sun.crypto.provider.CounterMode");
      Class<?> symmetricCipherClass = Class.forName("com.sun.crypto.provider.SymmetricCipher");
      hack.counterModeConstructor = counterModeClass.getDeclaredConstructor(symmetricCipherClass);
      hack.counterModeConstructor.setAccessible(true);
      Class<?> feedbackCipherClass = Class.forName("com.sun.crypto.provider.FeedbackCipher");
      hack.counterIvField = feedbackCipherClass.getDeclaredField("iv");
      hack.counterIvField.setAccessible(true);
      hack.counterModeResetMethod = counterModeClass.getDeclaredMethod("reset");
      hack.counterModeResetMethod.setAccessible(true);
      hack.counterModeCryptMethod = counterModeClass.getDeclaredMethod("implCrypt", byte[].class, int.class, int.class, byte[].class, int.class);
      hack.counterModeCryptMethod.setAccessible(true);
    } catch (SecurityException se) {
      hack.hackFailure = new UnsupportedOperationException(LightAesCtrEncrypter.class.getName() + " is not supported"
        + " because not all required permissions are given to the Encryption JAR file: " + se +
        " [To support it, grant at least the following permissions:" +
        " RuntimePermission(\"accessClassInPackage.com.sun.crypto.provider\") " +
        " and ReflectPermission(\"suppressAccessChecks\")]", se);
    } catch (ReflectiveOperationException | RuntimeException e) {
      hack.hackFailure = new UnsupportedOperationException(LightAesCtrEncrypter.class.getName() + " is not supported"
        + " on this platform because internal Java APIs are not compatible with this Solr version: " + e, e);
    }
    if (hack.hackFailure != null) {
      hack.aesCryptConstructor = null;
      hack.aesCryptInitMethod = null;
      hack.counterModeConstructor = null;
      hack.counterIvField = null;
      hack.counterModeResetMethod = null;
      hack.counterModeCryptMethod = null;
    }
    return hack;
  }