Support Basic and Digest auth

import javax.net.ssl.SSLContext;

import javax.net.ssl.X509TrustManager;

import at.bitfire.dav4android.BasicDigestAuthenticator;

import at.bitfire.dav4android.HttpUtils;

import de.duenndns.ssl.MemorizingTrustManager;

import lombok.RequiredArgsConstructor;

public class HttpClient extends OkHttpClient {

    protected static final String HEADER_AUTHORIZATION = "Authorization";

    final static UserAgentInterceptor userAgentInterceptor = new UserAgentInterceptor();

        if (preemptive)

            networkInterceptors().add(new PreemptiveAuthenticationInterceptor(username, password));

        else

            setAuthenticator(new DavAuthenticator(null, username, password));

            setAuthenticator(new BasicDigestAuthenticator(null, username, password));

    }

    /**

        username = client.username;

        password = client.password;

        setAuthenticator(new DavAuthenticator(host, username, password));

        setAuthenticator(new BasicDigestAuthenticator(host, username, password));

    }

        }

    }

    @RequiredArgsConstructor

    public static class DavAuthenticator implements Authenticator {

        final String host, username, password;

        @Override

        public Request authenticate(Proxy proxy, Response response) throws IOException {

            Request request = response.request();

            if (host != null && !request.httpUrl().host().equalsIgnoreCase(host)) {

                Constants.log.warn("Not authenticating against " +  host + " for security reasons!");

                return null;

            }

            // check whether this is the first authentication try with our credentials

            Response priorResponse = response.priorResponse();

            boolean triedBefore = priorResponse != null ? priorResponse.request().header(HEADER_AUTHORIZATION) != null : false;

            if (triedBefore)

                // credentials didn't work last time, and they won't work now → stop here

                return null;

            //List<HttpUtils.AuthScheme> schemes = HttpUtils.parseWwwAuthenticate(response.headers("WWW-Authenticate"));

            // TODO Digest auth

            return request.newBuilder()

                    .header(HEADER_AUTHORIZATION, Credentials.basic(username, password))

                    .build();

        }

        @Override

        public Request authenticateProxy(Proxy proxy, Response response) throws IOException {

            return null;

        }

    }

}

Subproject commit b1ca2ff7383381a407baffd05a6b3532e4cd1690

Subproject commit 9f722654e355e6e82b8b6e39a515b250feb111a9