106 lines
3.7 KiB
Java
106 lines
3.7 KiB
Java
/*
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* Copyright (C) 2013-2017 microG Project Team
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.microg.nlp;
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import android.content.Context;
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import android.content.SharedPreferences;
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import android.content.pm.PackageInfo;
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import android.content.pm.PackageManager;
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import android.content.pm.Signature;
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import android.preference.PreferenceManager;
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import android.provider.Settings;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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public class Preferences {
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private static final String DEFAULT_LOCATION_BACKENDS = "default_location_backends";
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private static final String DEFAULT_GEOCODER_BACKENDS = "default_geocoder_backends";
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private final Context context;
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public Preferences(Context context) {
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this.context = context;
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}
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private SharedPreferences getSharedPreferences() {
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return PreferenceManager.getDefaultSharedPreferences(context);
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}
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public String getDefaultLocationBackends() {
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String defBackends = Settings.Secure.getString(context.getContentResolver(), DEFAULT_LOCATION_BACKENDS);
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return defBackends == null ? "" : defBackends;
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}
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public String getLocationBackends() {
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return getSharedPreferences().getString(context.getString(R.string.pref_location_backends),
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getDefaultLocationBackends());
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}
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public String getDefaultGeocoderBackends() {
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String defBackends = Settings.Secure.getString(context.getContentResolver(), DEFAULT_GEOCODER_BACKENDS);
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return defBackends == null ? "" : defBackends;
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}
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public String getGeocoderBackends() {
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return getSharedPreferences().getString(context.getString(R.string.pref_geocoder_backends),
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getDefaultGeocoderBackends());
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}
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public static String[] splitBackendString(String backendString) {
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return backendString.split("\\|");
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}
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public static String firstSignatureDigest(Context context, String packageName) {
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PackageManager packageManager = context.getPackageManager();
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final PackageInfo info;
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try {
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info = packageManager.getPackageInfo(packageName, PackageManager.GET_SIGNATURES);
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} catch (PackageManager.NameNotFoundException e) {
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return null;
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}
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if (info != null && info.signatures != null && info.signatures.length > 0) {
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for (Signature sig : info.signatures) {
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String digest = sha1sum(sig.toByteArray());
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if (digest != null) {
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return digest;
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}
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}
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}
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return null;
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}
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private static String sha1sum(byte[] bytes) {
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MessageDigest md;
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try {
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md = MessageDigest.getInstance("SHA1");
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} catch (final NoSuchAlgorithmException e) {
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return null;
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}
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if (md != null) {
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bytes = md.digest(bytes);
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if (bytes != null) {
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StringBuilder sb = new StringBuilder(2 * bytes.length);
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for (byte b : bytes) {
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sb.append(String.format("%02x", b));
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}
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return sb.toString();
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}
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}
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return null;
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}
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}
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