rename main folders
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Dominik
257
APG/src/org/thialfihar/android/apg/util/HkpKeyServer.java
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257
APG/src/org/thialfihar/android/apg/util/HkpKeyServer.java
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/*
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* Copyright (C) 2011 Senecaso
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.thialfihar.android.apg.util;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.UnsupportedEncodingException;
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import java.net.HttpURLConnection;
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import java.net.InetAddress;
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import java.net.MalformedURLException;
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import java.net.URL;
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import java.net.URLEncoder;
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import java.net.UnknownHostException;
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import java.util.ArrayList;
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import java.util.GregorianCalendar;
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import java.util.List;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import org.apache.http.HttpEntity;
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import org.apache.http.HttpResponse;
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import org.apache.http.HttpStatus;
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import org.apache.http.NameValuePair;
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import org.apache.http.client.HttpClient;
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import org.apache.http.client.entity.UrlEncodedFormEntity;
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import org.apache.http.client.methods.HttpGet;
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import org.apache.http.client.methods.HttpPost;
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import org.apache.http.impl.client.DefaultHttpClient;
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import org.apache.http.message.BasicNameValuePair;
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import org.apache.http.util.EntityUtils;
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import org.thialfihar.android.apg.helper.PGPHelper;
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import org.thialfihar.android.apg.helper.PGPMain;
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import android.text.Html;
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public class HkpKeyServer extends KeyServer {
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private static class HttpError extends Exception {
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private static final long serialVersionUID = 1718783705229428893L;
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private int mCode;
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private String mData;
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public HttpError(int code, String data) {
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super("" + code + ": " + data);
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mCode = code;
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mData = data;
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}
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public int getCode() {
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return mCode;
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}
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public String getData() {
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return mData;
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}
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}
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private String mHost;
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private short mPort = 11371;
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// example:
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// pub 2048R/<a href="/pks/lookup?op=get&search=0x887DF4BE9F5C9090">9F5C9090</a> 2009-08-17 <a
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// href="/pks/lookup?op=vindex&search=0x887DF4BE9F5C9090">Jörg Runge
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// <joerg@joergrunge.de></a>
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public static Pattern PUB_KEY_LINE = Pattern
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.compile(
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"pub +([0-9]+)([a-z]+)/.*?0x([0-9a-z]+).*? +([0-9-]+) +(.+)[\n\r]+((?: +.+[\n\r]+)*)",
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Pattern.CASE_INSENSITIVE);
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public static Pattern USER_ID_LINE = Pattern.compile("^ +(.+)$", Pattern.MULTILINE
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| Pattern.CASE_INSENSITIVE);
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public HkpKeyServer(String host) {
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mHost = host;
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}
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public HkpKeyServer(String host, short port) {
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mHost = host;
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mPort = port;
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}
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static private String readAll(InputStream in, String encoding) throws IOException {
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ByteArrayOutputStream raw = new ByteArrayOutputStream();
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byte buffer[] = new byte[1 << 16];
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int n = 0;
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while ((n = in.read(buffer)) != -1) {
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raw.write(buffer, 0, n);
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}
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if (encoding == null) {
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encoding = "utf8";
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}
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return raw.toString(encoding);
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}
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private String query(String request) throws QueryException, HttpError {
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InetAddress ips[];
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try {
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ips = InetAddress.getAllByName(mHost);
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} catch (UnknownHostException e) {
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throw new QueryException(e.toString());
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}
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for (int i = 0; i < ips.length; ++i) {
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try {
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String url = "http://" + ips[i].getHostAddress() + ":" + mPort + request;
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URL realUrl = new URL(url);
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HttpURLConnection conn = (HttpURLConnection) realUrl.openConnection();
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conn.setConnectTimeout(5000);
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conn.setReadTimeout(25000);
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conn.connect();
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int response = conn.getResponseCode();
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if (response >= 200 && response < 300) {
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return readAll(conn.getInputStream(), conn.getContentEncoding());
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} else {
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String data = readAll(conn.getErrorStream(), conn.getContentEncoding());
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throw new HttpError(response, data);
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}
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} catch (MalformedURLException e) {
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// nothing to do, try next IP
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} catch (IOException e) {
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// nothing to do, try next IP
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}
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}
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throw new QueryException("querying server(s) for '" + mHost + "' failed");
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}
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@Override
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public ArrayList<KeyInfo> search(String query) throws QueryException, TooManyResponses,
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InsufficientQuery {
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ArrayList<KeyInfo> results = new ArrayList<KeyInfo>();
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if (query.length() < 3) {
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throw new InsufficientQuery();
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}
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String encodedQuery;
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try {
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encodedQuery = URLEncoder.encode(query, "utf8");
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} catch (UnsupportedEncodingException e) {
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return null;
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}
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String request = "/pks/lookup?op=index&search=" + encodedQuery;
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String data = null;
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try {
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data = query(request);
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} catch (HttpError e) {
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if (e.getCode() == 404) {
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return results;
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} else {
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if (e.getData().toLowerCase().contains("no keys found")) {
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return results;
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} else if (e.getData().toLowerCase().contains("too many")) {
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throw new TooManyResponses();
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} else if (e.getData().toLowerCase().contains("insufficient")) {
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throw new InsufficientQuery();
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}
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}
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throw new QueryException("querying server(s) for '" + mHost + "' failed");
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}
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Matcher matcher = PUB_KEY_LINE.matcher(data);
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while (matcher.find()) {
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KeyInfo info = new KeyInfo();
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info.size = Integer.parseInt(matcher.group(1));
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info.algorithm = matcher.group(2);
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info.keyId = PGPHelper.keyFromHex(matcher.group(3));
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info.fingerPrint = PGPHelper.getSmallFingerPrint(info.keyId);
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String chunks[] = matcher.group(4).split("-");
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info.date = new GregorianCalendar(Integer.parseInt(chunks[0]),
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Integer.parseInt(chunks[1]), Integer.parseInt(chunks[2])).getTime();
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info.userIds = new ArrayList<String>();
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if (matcher.group(5).startsWith("*** KEY")) {
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info.revoked = matcher.group(5);
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} else {
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String tmp = matcher.group(5).replaceAll("<.*?>", "");
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tmp = Html.fromHtml(tmp).toString();
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info.userIds.add(tmp);
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}
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if (matcher.group(6).length() > 0) {
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Matcher matcher2 = USER_ID_LINE.matcher(matcher.group(6));
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while (matcher2.find()) {
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String tmp = matcher2.group(1).replaceAll("<.*?>", "");
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tmp = Html.fromHtml(tmp).toString();
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info.userIds.add(tmp);
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}
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}
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results.add(info);
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}
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return results;
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}
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@Override
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public String get(long keyId) throws QueryException {
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HttpClient client = new DefaultHttpClient();
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try {
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HttpGet get = new HttpGet("http://" + mHost + ":" + mPort
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+ "/pks/lookup?op=get&search=0x" + PGPHelper.keyToHex(keyId));
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HttpResponse response = client.execute(get);
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if (response.getStatusLine().getStatusCode() != HttpStatus.SC_OK) {
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throw new QueryException("not found");
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}
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HttpEntity entity = response.getEntity();
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InputStream is = entity.getContent();
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String data = readAll(is, EntityUtils.getContentCharSet(entity));
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Matcher matcher = PGPMain.PGP_PUBLIC_KEY.matcher(data);
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if (matcher.find()) {
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return matcher.group(1);
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}
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} catch (IOException e) {
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// nothing to do, better luck on the next keyserver
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} finally {
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client.getConnectionManager().shutdown();
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}
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return null;
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}
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@Override
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public void add(String armouredText) throws AddKeyException {
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HttpClient client = new DefaultHttpClient();
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try {
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HttpPost post = new HttpPost("http://" + mHost + ":" + mPort + "/pks/add");
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List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
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nameValuePairs.add(new BasicNameValuePair("keytext", armouredText));
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post.setEntity(new UrlEncodedFormEntity(nameValuePairs));
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HttpResponse response = client.execute(post);
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if (response.getStatusLine().getStatusCode() != HttpStatus.SC_OK) {
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throw new AddKeyException();
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}
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} catch (IOException e) {
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// nothing to do, better luck on the next keyserver
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} finally {
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client.getConnectionManager().shutdown();
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}
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}
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}
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