201 lines
6.9 KiB
Java
201 lines
6.9 KiB
Java
/*
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* Copyright (C) 2017 Vincent Breitmoser <v.breitmoser@mugenguild.com>
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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.ui.keyview.loader;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.Comparator;
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import java.util.Date;
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import java.util.List;
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import android.content.ContentResolver;
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import android.content.Context;
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import android.database.Cursor;
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import android.support.annotation.NonNull;
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import android.support.v4.content.AsyncTaskLoader;
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import android.util.Log;
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import org.sufficientlysecure.keychain.Constants;
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import org.sufficientlysecure.keychain.pgp.CanonicalizedSecretKey.SecretKeyType;
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import org.sufficientlysecure.keychain.pgp.PgpSecurityConstants;
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import org.sufficientlysecure.keychain.pgp.SecurityProblem.KeySecurityProblem;
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import org.sufficientlysecure.keychain.provider.KeychainContract.Keys;
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import org.sufficientlysecure.keychain.ui.keyview.loader.SubkeyStatusLoader.KeySubkeyStatus;
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public class SubkeyStatusLoader extends AsyncTaskLoader<KeySubkeyStatus> {
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public static final String[] PROJECTION = new String[] {
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Keys.KEY_ID,
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Keys.CREATION,
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Keys.CAN_CERTIFY,
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Keys.CAN_SIGN,
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Keys.CAN_ENCRYPT,
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Keys.HAS_SECRET,
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Keys.EXPIRY,
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Keys.IS_REVOKED,
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Keys.ALGORITHM,
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Keys.KEY_SIZE,
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Keys.KEY_CURVE_OID
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};
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private static final int INDEX_KEY_ID = 0;
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private static final int INDEX_CREATION = 1;
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private static final int INDEX_CAN_CERTIFY = 2;
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private static final int INDEX_CAN_SIGN = 3;
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private static final int INDEX_CAN_ENCRYPT = 4;
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private static final int INDEX_HAS_SECRET = 5;
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private static final int INDEX_EXPIRY = 6;
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private static final int INDEX_IS_REVOKED = 7;
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private static final int INDEX_ALGORITHM = 8;
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private static final int INDEX_KEY_SIZE = 9;
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private static final int INDEX_KEY_CURVE_OID = 10;
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private final ContentResolver contentResolver;
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private final long masterKeyId;
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private final Comparator<SubKeyItem> comparator;
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private KeySubkeyStatus cachedResult;
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public SubkeyStatusLoader(Context context, ContentResolver contentResolver, long masterKeyId,
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Comparator<SubKeyItem> comparator) {
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super(context);
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this.contentResolver = contentResolver;
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this.masterKeyId = masterKeyId;
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this.comparator = comparator;
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}
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@Override
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public KeySubkeyStatus loadInBackground() {
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Cursor cursor = contentResolver.query(Keys.buildKeysUri(masterKeyId), PROJECTION, null, null, null);
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if (cursor == null) {
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Log.e(Constants.TAG, "Error loading key items!");
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return null;
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}
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try {
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SubKeyItem keyCertify = null;
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ArrayList<SubKeyItem> keysSign = new ArrayList<>();
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ArrayList<SubKeyItem> keysEncrypt = new ArrayList<>();
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while (cursor.moveToNext()) {
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SubKeyItem ski = new SubKeyItem(masterKeyId, cursor);
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if (ski.mKeyId == masterKeyId) {
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keyCertify = ski;
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}
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if (ski.mCanSign) {
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keysSign.add(ski);
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}
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if (ski.mCanEncrypt) {
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keysEncrypt.add(ski);
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}
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}
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if (keyCertify == null) {
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throw new IllegalStateException("Certification key must be set at this point, it's a bug otherwise!");
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}
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Collections.sort(keysSign, comparator);
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Collections.sort(keysEncrypt, comparator);
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return new KeySubkeyStatus(keyCertify, keysSign, keysEncrypt);
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} finally {
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cursor.close();
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}
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}
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@Override
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public void deliverResult(KeySubkeyStatus keySubkeyStatus) {
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cachedResult = keySubkeyStatus;
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if (isStarted()) {
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super.deliverResult(keySubkeyStatus);
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}
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}
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@Override
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protected void onStartLoading() {
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if (cachedResult != null) {
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deliverResult(cachedResult);
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}
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if (takeContentChanged() || cachedResult == null) {
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forceLoad();
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}
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}
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public static class KeySubkeyStatus {
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@NonNull
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public final SubKeyItem keyCertify;
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public final List<SubKeyItem> keysSign;
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public final List<SubKeyItem> keysEncrypt;
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KeySubkeyStatus(@NonNull SubKeyItem keyCertify, List<SubKeyItem> keysSign, List<SubKeyItem> keysEncrypt) {
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this.keyCertify = keyCertify;
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this.keysSign = keysSign;
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this.keysEncrypt = keysEncrypt;
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}
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}
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public static class SubKeyItem {
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final int mPosition;
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final long mKeyId;
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final Date mCreation;
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public final SecretKeyType mSecretKeyType;
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public final boolean mIsRevoked, mIsExpired;
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public final Date mExpiry;
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final boolean mCanCertify, mCanSign, mCanEncrypt;
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public final KeySecurityProblem mSecurityProblem;
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SubKeyItem(long masterKeyId, Cursor cursor) {
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mPosition = cursor.getPosition();
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mKeyId = cursor.getLong(INDEX_KEY_ID);
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mCreation = new Date(cursor.getLong(INDEX_CREATION) * 1000);
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mSecretKeyType = SecretKeyType.fromNum(cursor.getInt(INDEX_HAS_SECRET));
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mIsRevoked = cursor.getInt(INDEX_IS_REVOKED) > 0;
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mExpiry = cursor.isNull(INDEX_EXPIRY) ? null : new Date(cursor.getLong(INDEX_EXPIRY) * 1000);
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mIsExpired = mExpiry != null && mExpiry.before(new Date());
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mCanCertify = cursor.getInt(INDEX_CAN_CERTIFY) > 0;
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mCanSign = cursor.getInt(INDEX_CAN_SIGN) > 0;
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mCanEncrypt = cursor.getInt(INDEX_CAN_ENCRYPT) > 0;
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int algorithm = cursor.getInt(INDEX_ALGORITHM);
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Integer bitStrength = cursor.isNull(INDEX_KEY_SIZE) ? null : cursor.getInt(INDEX_KEY_SIZE);
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String curveOid = cursor.getString(INDEX_KEY_CURVE_OID);
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mSecurityProblem = PgpSecurityConstants.getKeySecurityProblem(
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masterKeyId, mKeyId, algorithm, bitStrength, curveOid);
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}
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public boolean newerThan(SubKeyItem other) {
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return mCreation.after(other.mCreation);
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}
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public boolean isValid() {
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return !mIsRevoked && !mIsExpired;
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}
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}
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}
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