@Override
        protected void engineSetPadding(String padding) throws NoSuchPaddingException {
            String paddingUpper = padding.toUpperCase(Locale.US);
            if (paddingUpper.equals("OAEPPADDING")) {
                this.padding = NativeConstants.RSA_PKCS1_OAEP_PADDING;
                return;
            }

            throw new NoSuchPaddingException("Only OAEP padding is supported");
        }
Returns {@code true} if the cipher has been initialized.
common/src/main/java/org/conscrypt/OpenSSLCipherRSA.java