108 lines
3.7 KiB
Java
108 lines
3.7 KiB
Java
/*
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* Copyright (C) 2017 Schürmann & Breitmoser GbR
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.sufficientlysecure.keychain.network;
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import java.net.URISyntaxException;
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import java.nio.charset.Charset;
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import android.annotation.SuppressLint;
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import androidx.annotation.NonNull;
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import androidx.annotation.Nullable;
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import com.google.auto.value.AutoValue;
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import org.bouncycastle.util.encoders.DecoderException;
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import org.bouncycastle.util.encoders.Hex;
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import org.sufficientlysecure.keychain.Constants;
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import timber.log.Timber;
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@AutoValue
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abstract class SktUri {
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private static final String QRCODE_URI_FORMAT = Constants.SKT_SCHEME + ":%s/%d/%s";
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private static final String QRCODE_URI_FORMAT_SSID = Constants.SKT_SCHEME + ":%s/%d/%s/SSID:%s";
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public abstract String getHost();
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public abstract int getPort();
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@SuppressWarnings("mutable")
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public abstract byte[] getPresharedKey();
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@Nullable
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public abstract String getWifiSsid();
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@NonNull
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public static SktUri parse(String input) throws URISyntaxException {
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if (!input.startsWith(Constants.SKT_SCHEME + ":")) {
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throw new URISyntaxException(input, "invalid scheme");
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}
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String[] pieces = input.substring(input.indexOf(":") +1).split("/");
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if (pieces.length < 3) {
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throw new URISyntaxException(input, "invalid syntax");
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}
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String address = pieces[0];
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int port;
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try {
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port = Integer.parseInt(pieces[1]);
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} catch (NumberFormatException e) {
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throw new URISyntaxException(input, "error parsing port");
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}
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byte[] psk;
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try {
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psk = Hex.decode(pieces[2]);
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} catch (DecoderException e) {
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throw new URISyntaxException(input, "error parsing hex psk");
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}
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String wifiSsid = null;
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for (int i = 3; i < pieces.length; i++) {
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String[] optarg = pieces[i].split(":", 2);
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if (optarg.length == 2 && "SSID".equals(optarg[0])) {
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try {
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wifiSsid = new String(Hex.decode(optarg[1]));
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} catch (DecoderException e) {
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Timber.d("error parsing ssid in skt uri, ignoring: " + input);
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}
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}
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}
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return new AutoValue_SktUri(address, port, psk, wifiSsid);
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}
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@SuppressLint("DefaultLocale")
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String toUriString() {
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String sktHex = Hex.toHexString(getPresharedKey());
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String wifiSsid = getWifiSsid();
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String result;
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if (wifiSsid != null) {
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String encodedWifiSsid = Hex.toHexString(getWifiSsid().getBytes(Charset.defaultCharset()));
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result = String.format(QRCODE_URI_FORMAT_SSID, getHost(), getPort(), sktHex, encodedWifiSsid);
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} else {
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result = String.format(QRCODE_URI_FORMAT, getHost(), getPort(), sktHex);
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}
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return result.toUpperCase();
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}
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static SktUri create(String host, int port, byte[] presharedKey, @Nullable String wifiSsid) {
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return new AutoValue_SktUri(host, port, presharedKey, wifiSsid);
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}
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}
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