/
Website.java
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/
Website.java
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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 com.textuality.keybase.lib.prover;
import com.textuality.keybase.lib.JWalk;
import com.textuality.keybase.lib.KeybaseException;
import com.textuality.keybase.lib.Proof;
import org.json.JSONException;
import org.json.JSONObject;
import java.net.MalformedURLException;
import java.net.URL;
public class Website extends Prover {
public Website(Proof proof) {
super(proof);
}
@Override
public boolean fetchProofData() {
try {
JSONObject sigJSON = readSig(mProof.getSigId());
// find the .well-known URL
String wellKnownUrl = JWalk.getString(sigJSON, "api_url");
// fetch the proof
Fetch fetch = new Fetch(wellKnownUrl);
String problem = fetch.problem();
if (problem != null) {
mLog.add(problem);
return false;
}
String actualUrl = fetch.getActualUrl();
// Paranoid Interlude:
// A bad guy who can’t post to the site might still be able to squeeze in a redirect
// to somewhere else, so let’s ensure that the data is really coming from the site
//
String nametag = mProof.getNametag();
URL url = new URL(actualUrl);
String scheme = url.getProtocol();
String host = url.getHost();
if (!(scheme.equals("http") || scheme.equals("https")) &&
host.equals(nametag)) {
mLog.add("Proof either doesn’t come from " + nametag + " or isn’t at an HTTP URL");
return false;
}
// verify that message appears in gist
if (!fetch.getBody().contains(mPgpMessage)) {
mLog.add("Website claiming post doesn’t contain signed PGP message");
return false;
}
return true;
} catch (KeybaseException e) {
mLog.add("Keybase API problem: " + e.getLocalizedMessage());
} catch (JSONException e) {
mLog.add("Broken JSON message: " + e.getLocalizedMessage());
} catch (MalformedURLException e) {
mLog.add("Malformed proof URL");
}
return false;
}
@Override
public String getPresenceLabel() throws KeybaseException {
return mProof.getNametag();
}
}