Method _call

app/src/main/java/eu/faircode/email/CloudSync.java:631–762

(Context context, String user, String password, JSONObject jrequest)

    }

    private static JSONObject _call(Context context, String user, String password, JSONObject jrequest)
            throws GeneralSecurityException, JSONException, IOException, InvalidCipherTextException {
        byte[] salt = getSalt(user);
        String cloudUser = getCloudUser(salt);

        Pair<byte[], byte[]> key;
        String lookup = Helper.hex(salt) + ":" + password;
        synchronized (keyCache) {
            key = keyCache.get(lookup);
        }
        if (key == null) {
            EntityLog.log(context, EntityLog.Type.Cloud, "Cloud generating key");
            key = getKeyPair(salt, password);
            synchronized (keyCache) {
                keyCache.put(lookup, key);
            }
        } else {
            EntityLog.log(context, EntityLog.Type.Cloud, "Cloud using cached key");
        }

        String cloudPassword = Base64.encodeToString(key.first, Base64.NO_PADDING | Base64.NO_WRAP);

        jrequest.put("version", 1);
        jrequest.put("username", cloudUser);
        jrequest.put("password", cloudPassword);
        jrequest.put("debug", BuildConfig.DEBUG);

        if (jrequest.has("items")) {
            JSONArray jitems = jrequest.getJSONArray("items");
            for (int i = 0; i < jitems.length(); i++) {
                JSONObject jitem = jitems.getJSONObject(i);
                long revision = jitem.optLong("rev", 0);

                String k = jitem.getString("key");
                String v = null;
                if (jitem.has("val") && !jitem.isNull("val")) {
                    v = jitem.getString("val");
                    jitem.put("val", transform(v, key.second, getIv(revision), getAd(k, revision), true));
                }
                v = (v == null ? null : "#" + v.length());

                Log.i("Cloud > " + k + "=" + v + " @" + revision);
            }
        }

        String request = jrequest.toString();
        EntityLog.log(context, EntityLog.Type.Cloud,
                "Cloud request length=" + request.length());

        URL url = new URL(BuildConfig.CLOUD_URI);
        HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
        connection.setRequestMethod("POST");
        connection.setDoInput(true);
        connection.setDoOutput(true);
        connection.setReadTimeout(CLOUD_TIMEOUT);
        connection.setConnectTimeout(CLOUD_TIMEOUT);
        ConnectionHelper.setUserAgent(context, connection);
        connection.setRequestProperty("Accept", "application/json");