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/*
* 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.sufficientlysecure.keychain.keyimport;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.util.JWalk;
import org.sufficientlysecure.keychain.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 WeakHashMap<String, String> mKeyCache = new WeakHashMap<String, String>();
@Override
public ArrayList<ImportKeysListEntry> search(String query) throws QueryException, TooManyResponses,
InsufficientQuery {
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);
}
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 QueryException("Unexpected structure in keybase search result: " + e.getMessage());
}
return results;
}
private JSONObject getUser(String keybaseId) throws QueryException {
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 QueryException(e.getMessage() + detail);
}
}
private ImportKeysListEntry makeEntry(JSONObject match) throws QueryException, JSONException {
final ImportKeysListEntry entry = new ImportKeysListEntry();
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();
// in anticipation of a full fingerprint, only use the last 16 chars as 64-bit key id
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);
// TODO: Fix; have suggested keybase provide this value to avoid search-time crypto calls
//entry.setBitStrength(4096);
//entry.setAlgorithm("RSA");
entry.setFingerprintHex(fingerprint);
// key data
// currently there's no need to query the user right away, and it should be avoided, so the
// user doesn't experience lag and doesn't download many keys unnecessarily, but should we
// require to do it at soe point:
// (weakly) remember the key, in case the user tries to import it
//mKeyCache.put(keybaseId, JWalk.getString(match, "them", "public_keys", "primary", "bundle"));
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 QueryException {
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 QueryException("Keybase autocomplete search failed");
}
return json;
} catch (JSONException e) {
throw new QueryException("Keybase.io query returned broken JSON");
}
} else {
String message = readAll(conn.getErrorStream(), conn.getContentEncoding());
throw new QueryException("Keybase.io query error (status=" + response +
"): " + message);
}
} catch (Exception e) {
throw new QueryException("Keybase.io query error");
}
}
@Override
public String get(String id) throws QueryException {
String key = mKeyCache.get(id);
if (key == null) {
try {
JSONObject user = getUser(id);
key = JWalk.getString(user, "them", "public_keys", "primary", "bundle");
} catch (Exception e) {
throw new QueryException(e.getMessage());
}
}
return key;
}
@Override
public void add(String armoredKey) throws AddKeyException {
throw new AddKeyException();
}
}
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