Merge "Insert Android Keystore JCA Provider at the correct position."

     */

    public static void install() {

        Provider[] providers = Security.getProviders();

        int bcProviderPosition = -1;

        for (int position = 0; position < providers.length; position++) {

            Provider provider = providers[position];

        int bcProviderIndex = -1;

        for (int i = 0; i < providers.length; i++) {

            Provider provider = providers[i];

            if ("BC".equals(provider.getName())) {

                bcProviderPosition = position;

                bcProviderIndex = i;

                break;

            }

        }

        Security.addProvider(new AndroidKeyStoreProvider());

        Provider workaroundProvider = new AndroidKeyStoreBCWorkaroundProvider();

        if (bcProviderPosition != -1) {

        if (bcProviderIndex != -1) {

            // Bouncy Castle provider found -- install the workaround provider above it.

            Security.insertProviderAt(workaroundProvider, bcProviderPosition);

            // insertProviderAt uses 1-based positions.

            Security.insertProviderAt(workaroundProvider, bcProviderIndex + 1);

        } else {

            // Bouncy Castle provider not found -- install the workaround provider at lowest

            // priority.