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package org.sufficientlysecure.keychain.pgp.linked.resources;
import android.content.Context;
import org.sufficientlysecure.keychain.operations.results.OperationResult.OperationLog;
import org.sufficientlysecure.keychain.pgp.linked.LinkedResource;
import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils;
import java.net.URI;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import de.measite.minidns.Client;
import de.measite.minidns.DNSMessage;
import de.measite.minidns.Question;
import de.measite.minidns.Record;
import de.measite.minidns.Record.TYPE;
import de.measite.minidns.record.TXT;
public class DnsResource extends LinkedResource {
static Pattern magicPattern =
Pattern.compile("pgpid\\+cookie=([a-zA-Z0-9]+)(?:#|;)([a-zA-Z0-9]+)");
DnsResource(Set<String> flags, HashMap<String, String> params, URI uri) {
super(flags, params, uri);
}
public static String generateText (Context context, byte[] fingerprint, String nonce) {
return "pgpid+cookie="
+ KeyFormattingUtils.convertFingerprintToHex(fingerprint) + ";" + nonce + "";
}
public static DnsResource createNew (String domain) {
HashSet<String> flags = new HashSet<String>();
HashMap<String,String> params = new HashMap<String,String>();
URI uri = URI.create("dns:" + domain);
return create(flags, params, uri);
}
public static DnsResource create(Set<String> flags, HashMap<String,String> params, URI uri) {
if ( ! ("dns".equals(uri.getScheme())
&& (flags == null || flags.isEmpty())
&& (params == null || params.isEmpty()))) {
return null;
}
return new DnsResource(flags, params, uri);
}
@Override
protected String fetchResource (OperationLog log, int indent) {
Client c = new Client();
DNSMessage msg = c.query(new Question("mugenguild.com", TYPE.TXT));
Record aw = msg.getAnswers()[0];
TXT txt = (TXT) aw.getPayload();
return txt.getText().toLowerCase();
}
@Override
protected Matcher matchResource(OperationLog log, int indent, String res) {
return magicPattern.matcher(res);
}
}
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