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package org.thialfihar.android.apg;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.util.GregorianCalendar;
import java.util.List;
import java.util.Vector;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import android.text.Html;
public class HkpKeyServer extends KeyServer {
private String mHost;
private short mPort = 11371;
// example:
// pub 2048R/<a href="/pks/lookup?op=get&search=0x887DF4BE9F5C9090">9F5C9090</a> 2009-08-17 <a href="/pks/lookup?op=vindex&search=0x887DF4BE9F5C9090">Jörg Runge <joerg@joergrunge.de></a>
public static Pattern PUB_KEY_LINE =
Pattern.compile("pub +([0-9]+)([a-z]+)/.*?0x([0-9a-z]+).*? +([0-9-]+) +(.+)[\n\r]+((?: +.+[\n\r]+)*)",
Pattern.CASE_INSENSITIVE);
public static Pattern USER_ID_LINE =
Pattern.compile("^ +(.+)$", Pattern.MULTILINE | Pattern.CASE_INSENSITIVE);
public HkpKeyServer(String host) {
mHost = host;
}
public HkpKeyServer(String host, short port) {
mHost = host;
mPort = port;
}
@Override
List<KeyInfo> search(String query)
throws MalformedURLException, IOException {
Vector<KeyInfo> results = new Vector<KeyInfo>();
String url = "http://" + mHost + ":" + mPort + "/pks/lookup?op=index&search=" +
URLEncoder.encode(query, "utf8");
URL realUrl = new URL(url);
URLConnection conn = realUrl.openConnection();
InputStream is = conn.getInputStream();
ByteArrayOutputStream raw = new ByteArrayOutputStream();
byte buffer[] = new byte[1 << 16];
int n = 0;
while ((n = is.read(buffer)) != -1) {
raw.write(buffer, 0, n);
}
String encoding = conn.getContentEncoding();
if (encoding == null) {
encoding = "utf8";
}
String data = raw.toString(encoding);
Matcher matcher = PUB_KEY_LINE.matcher(data);
while (matcher.find()) {
KeyInfo info = new KeyInfo();
info.size = Integer.parseInt(matcher.group(1));
info.algorithm = matcher.group(2);
info.keyId = Apg.keyFromHex(matcher.group(3));
info.fingerPrint = Apg.getFingerPrint(info.keyId);
String chunks[] = matcher.group(4).split("-");
info.date = new GregorianCalendar(Integer.parseInt(chunks[0]),
Integer.parseInt(chunks[1]),
Integer.parseInt(chunks[2])).getTime();
info.userIds = new Vector<String>();
if (matcher.group(5).startsWith("*** KEY")) {
info.revoked = matcher.group(5);
} else {
String tmp = matcher.group(5).replaceAll("<.*?>", "");
tmp = Html.fromHtml(tmp).toString();
info.userIds.add(tmp);
}
if (matcher.group(6).length() > 0) {
Matcher matcher2 = USER_ID_LINE.matcher(matcher.group(6));
while (matcher2.find()) {
String tmp = matcher2.group(1).replaceAll("<.*?>", "");
tmp = Html.fromHtml(tmp).toString();
info.userIds.add(tmp);
}
}
results.add(info);
}
return results;
}
@Override
String get(long keyId)
throws MalformedURLException, IOException {
String url = "http://" + mHost + ":" + mPort +
"/pks/lookup?op=get&search=0x" + Apg.keyToHex(keyId);
URL realUrl = new URL(url);
URLConnection conn = realUrl.openConnection();
InputStream is = conn.getInputStream();
ByteArrayOutputStream raw = new ByteArrayOutputStream();
byte buffer[] = new byte[1 << 16];
int n = 0;
while ((n = is.read(buffer)) != -1) {
raw.write(buffer, 0, n);
}
String data = raw.toString();
Matcher matcher = Apg.PGP_PUBLIC_KEY.matcher(data);
if (matcher.find()) {
return matcher.group(1);
}
return null;
}
}
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