Java tutorial
/* * Copyright (C) 2014 Tim Bray <tbray@textuality.com> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package org.thialfihar.android.apg.keyimport; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import org.thialfihar.android.apg.Constants; import org.thialfihar.android.apg.pgp.PgpKeyHelper; import org.thialfihar.android.apg.util.JWalk; import org.thialfihar.android.apg.util.Log; import java.net.HttpURLConnection; import java.net.URL; import java.net.URLEncoder; import java.util.ArrayList; import java.util.GregorianCalendar; import java.util.TimeZone; import java.util.WeakHashMap; public class KeybaseKeyserver extends Keyserver { private String mQuery; @Override public ArrayList<ImportKeysListEntry> search(String query) throws QueryFailedException, QueryNeedsRepairException { ArrayList<ImportKeysListEntry> results = new ArrayList<ImportKeysListEntry>(); if (query.startsWith("0x")) { // cut off "0x" if a user is searching for a key id query = query.substring(2); } mQuery = query; JSONObject fromQuery = getFromKeybase("_/api/1.0/user/autocomplete.json?q=", query); try { JSONArray matches = JWalk.getArray(fromQuery, "completions"); for (int i = 0; i < matches.length(); i++) { JSONObject match = matches.getJSONObject(i); // only list them if they have a key if (JWalk.optObject(match, "components", "key_fingerprint") != null) { String keybaseId = JWalk.getString(match, "components", "username", "val"); String fingerprint = JWalk.getString(match, "components", "key_fingerprint", "val"); fingerprint = fingerprint.replace(" ", "").toUpperCase(); if (keybaseId.equals(query) || fingerprint.startsWith(query.toUpperCase())) { results.add(makeEntry(match)); } else { results.add(makeEntry(match)); } } } } catch (Exception e) { Log.e(Constants.TAG, "keybase result parsing error", e); throw new QueryFailedException("Unexpected structure in keybase search result: " + e.getMessage()); } return results; } private JSONObject getUser(String keybaseId) throws QueryFailedException { try { return getFromKeybase("_/api/1.0/user/lookup.json?username=", keybaseId); } catch (Exception e) { String detail = ""; if (keybaseId != null) { detail = ". Query was for user '" + keybaseId + "'"; } throw new QueryFailedException(e.getMessage() + detail); } } private ImportKeysListEntry makeEntry(JSONObject match) throws QueryFailedException, JSONException { final ImportKeysListEntry entry = new ImportKeysListEntry(); entry.setQuery(mQuery); String keybaseId = JWalk.getString(match, "components", "username", "val"); String fullName = JWalk.getString(match, "components", "full_name", "val"); String fingerprint = JWalk.getString(match, "components", "key_fingerprint", "val"); fingerprint = fingerprint.replace(" ", "").toUpperCase(); // not strictly necessary but doesn't hurt entry.setFingerprintHex(fingerprint); entry.setKeyIdHex("0x" + fingerprint.substring(Math.max(0, fingerprint.length() - 16))); // store extra info, so we can query for the keybase id directly entry.setExtraData(keybaseId); final int algorithmId = JWalk.getInt(match, "components", "key_fingerprint", "algo"); entry.setAlgorithm(PgpKeyHelper.getAlgorithmInfo(algorithmId)); final int bitStrength = JWalk.getInt(match, "components", "key_fingerprint", "nbits"); entry.setBitStrength(bitStrength); ArrayList<String> userIds = new ArrayList<String>(); String name = fullName + " <keybase.io/" + keybaseId + ">"; userIds.add(name); try { userIds.add("github.com/" + JWalk.getString(match, "components", "github", "val")); } catch (JSONException e) { // ignore } try { userIds.add("twitter.com/" + JWalk.getString(match, "components", "twitter", "val")); } catch (JSONException e) { // ignore } try { JSONArray array = JWalk.getArray(match, "components", "websites"); JSONObject website = array.getJSONObject(0); userIds.add(JWalk.getString(website, "val")); } catch (JSONException e) { // ignore } entry.setUserIds(userIds); entry.setPrimaryUserId(name); return entry; } private JSONObject getFromKeybase(String path, String query) throws QueryFailedException { try { String url = "https://keybase.io/" + path + URLEncoder.encode(query, "utf8"); Log.d(Constants.TAG, "keybase query: " + url); URL realUrl = new URL(url); HttpURLConnection conn = (HttpURLConnection) realUrl.openConnection(); conn.setConnectTimeout(5000); // TODO: Reasonable values for keybase conn.setReadTimeout(25000); conn.connect(); int response = conn.getResponseCode(); if (response >= 200 && response < 300) { String text = readAll(conn.getInputStream(), conn.getContentEncoding()); try { JSONObject json = new JSONObject(text); if (JWalk.getInt(json, "status", "code") != 0) { throw new QueryFailedException("Keybase autocomplete search failed"); } return json; } catch (JSONException e) { throw new QueryFailedException("Keybase.io query returned broken JSON"); } } else { String message = readAll(conn.getErrorStream(), conn.getContentEncoding()); throw new QueryFailedException("Keybase.io query error (status=" + response + "): " + message); } } catch (Exception e) { throw new QueryFailedException("Keybase.io query error"); } } @Override public String get(String id) throws QueryFailedException { try { JSONObject user = getUser(id); return JWalk.getString(user, "them", "public_keys", "primary", "bundle"); } catch (Exception e) { throw new QueryFailedException(e.getMessage()); } } @Override public void add(String armoredKey) throws AddKeyException { throw new AddKeyException(); } }