synchronized final void ensureReadParams() {
        if (fetchedParams) {
            return;
        }
        readParams(NativeCrypto.get_RSA_private_params(key.getNativeRef()));
        fetchedParams = true;
    }
Wraps the provided private key for use in the TLS/SSL stack only. Sign/decrypt operations
using the key will be delegated to the {@code Signature}/{@code Cipher} implementation of the
provider which accepts the key.
common/src/main/java/org/conscrypt/OpenSSLRSAPrivateKey.java