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");
}
}
