public static final void main(String[] args) throws Exception { // Generate a PBE key SecretKeyFactory skFac = SecretKeyFactory.getInstance("PBE"); SecretKey skey = skFac.generateSecret(new PBEKeySpec("test123".toCharArray())); // Initialize the PBE cipher Cipher cipher = Cipher.getInstance(ALGO); cipher.init(Cipher.ENCRYPT_MODE, skey); // Permit access to the Cipher.spi field (a CipherSpi object) Field spi = Cipher.class.getDeclaredField("spi"); spi.setAccessible(true); Object value = spi.get(cipher); // Permit access to the CipherSpi.engineGetKeySize method Method engineGetKeySize = PKCS12PBECipherCore$PBEWithSHA1AndDESede.class.getDeclaredMethod( "engineGetKeySize", Key.class); engineGetKeySize.setAccessible(true); // Check the key size int keySize = (int) engineGetKeySize.invoke(value, skey); if (keySize == KEYSIZE) { System.out.println(ALGO + ".engineGetKeySize returns " + keySize + " bits, as expected"); System.out.println("OK"); } else { throw new Exception("ERROR: " + ALGO + " key size is incorrect"); } }
/** * Gets the features of a specific <tt>DiscoverInfo</tt> in the form of a read-only * <tt>Feature</tt> <tt>Iterator<tt/> by calling the internal method {@link * DiscoverInfo#getFeatures()}. * * @param discoverInfo the <tt>DiscoverInfo</tt> the features of which are to be retrieved * @return a read-only <tt>Feature</tt> <tt>Iterator</tt> which lists the features of the * specified <tt>discoverInfo</tt> */ @SuppressWarnings("unchecked") private static Iterator<DiscoverInfo.Feature> getDiscoverInfoFeatures(DiscoverInfo discoverInfo) { Method getFeaturesMethod; try { getFeaturesMethod = DiscoverInfo.class.getDeclaredMethod("getFeatures"); } catch (NoSuchMethodException nsmex) { throw new UndeclaredThrowableException(nsmex); } getFeaturesMethod.setAccessible(true); try { return (Iterator<DiscoverInfo.Feature>) getFeaturesMethod.invoke(discoverInfo); } catch (IllegalAccessException iaex) { throw new UndeclaredThrowableException(iaex); } catch (InvocationTargetException itex) { throw new UndeclaredThrowableException(itex); } }