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/*
* Copyright (C) 2012-2014 Dominik Schürmann <dominik@dominikschuermann.de>
* Copyright (C) 2011-2014 Thialfihar <thi@thialfihar.org>
* Copyright (C) 2011 Senecaso
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.sufficientlysecure.keychain.util;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.ui.adapter.ImportKeysListEntry;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
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>();
private static String readAll(InputStream in, String encoding) throws IOException {
ByteArrayOutputStream raw = new ByteArrayOutputStream();
byte buffer[] = new byte[1 << 16];
int n = 0;
while ((n = in.read(buffer)) != -1) {
raw.write(buffer, 0, n);
}
if (encoding == null) {
encoding = "utf8";
}
return raw.toString(encoding);
}
@Override
public ArrayList<ImportKeysListEntry> search(String query) throws QueryException, TooManyResponses,
InsufficientQuery {
ArrayList<ImportKeysListEntry> results = new ArrayList<ImportKeysListEntry>();
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) {
results.add(makeEntry(match));
}
}
} catch (Exception 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 {
String keybaseID = JWalk.getString(match, "components", "username", "val");
String key_fingerprint = JWalk.getString(match, "components", "key_fingerprint", "val");
key_fingerprint = key_fingerprint.replace(" ", "").toUpperCase();
match = getUser(keybaseID);
final ImportKeysListEntry entry = new ImportKeysListEntry();
entry.setBitStrength(4096);
entry.setAlgorithm("RSA");
entry.setKeyIdHex("0x" + key_fingerprint);
final long creationDate = JWalk.getLong(match, "them", "public_keys", "primary", "ctime");
final GregorianCalendar tmpGreg = new GregorianCalendar(TimeZone.getTimeZone("UTC"));
tmpGreg.setTimeInMillis(creationDate * 1000);
entry.setDate(tmpGreg.getTime());
entry.setRevoked(false);
mKeyCache.put(keybaseID, JWalk.getString(match,"them", "public_keys", "primary", "bundle"));
String name = JWalk.getString(match, "them", "profile", "full_name");
ArrayList<String> userIds = new ArrayList<String>();
userIds.add(name);
userIds.add("keybase.io/" + keybaseID); // TODO: Maybe should be keybaseID@keybase.io ?
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 {
// id is like "keybase/username"
String keybaseID = id.substring(id.indexOf('/') + 1);
String key = mKeyCache.get(keybaseID);
if (key == null) {
try {
JSONObject user = getUser(keybaseID);
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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