334 lines
14 KiB
Java
334 lines
14 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.operations;
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import java.io.BufferedOutputStream;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.text.SimpleDateFormat;
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import java.util.Collections;
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import java.util.Date;
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import java.util.Locale;
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import java.util.concurrent.atomic.AtomicBoolean;
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import android.content.Context;
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import android.database.Cursor;
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import android.net.Uri;
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import android.support.annotation.NonNull;
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import android.support.annotation.Nullable;
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import android.text.TextUtils;
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import org.bouncycastle.bcpg.ArmoredOutputStream;
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import org.sufficientlysecure.keychain.Constants;
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import org.sufficientlysecure.keychain.R;
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import org.sufficientlysecure.keychain.operations.results.ExportResult;
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import org.sufficientlysecure.keychain.operations.results.OperationResult.LogType;
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import org.sufficientlysecure.keychain.operations.results.OperationResult.OperationLog;
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import org.sufficientlysecure.keychain.operations.results.PgpSignEncryptResult;
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import org.sufficientlysecure.keychain.pgp.CanonicalizedPublicKeyRing;
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import org.sufficientlysecure.keychain.pgp.CanonicalizedSecretKeyRing;
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import org.sufficientlysecure.keychain.pgp.PgpSignEncryptData;
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import org.sufficientlysecure.keychain.pgp.PgpSignEncryptInputParcel;
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import org.sufficientlysecure.keychain.pgp.PgpSignEncryptOperation;
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import org.sufficientlysecure.keychain.pgp.Progressable;
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import org.sufficientlysecure.keychain.pgp.UncachedKeyRing;
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import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException;
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import org.sufficientlysecure.keychain.provider.KeyRepository;
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import org.sufficientlysecure.keychain.provider.KeyRepository.NotFoundException;
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import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRings;
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import org.sufficientlysecure.keychain.provider.KeychainDatabase.Tables;
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import org.sufficientlysecure.keychain.provider.TemporaryFileProvider;
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import org.sufficientlysecure.keychain.service.BackupKeyringParcel;
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import org.sufficientlysecure.keychain.service.input.CryptoInputParcel;
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import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils;
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import org.sufficientlysecure.keychain.util.CountingOutputStream;
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import org.sufficientlysecure.keychain.util.InputData;
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import org.sufficientlysecure.keychain.util.Log;
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/**
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* An operation class which implements high level backup
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* operations.
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* This class receives a source and/or destination of keys as input and performs
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* all steps for this backup.
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*
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* see org.sufficientlysecure.keychain.ui.adapter.ImportKeysAdapter#getSelectedEntries()
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* For the backup operation, the input consists of a set of key ids and
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* either the name of a file or an output uri to write to.
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*/
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public class BackupOperation extends BaseOperation<BackupKeyringParcel> {
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private static final String[] PROJECTION = new String[] {
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KeyRings.MASTER_KEY_ID,
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KeyRings.HAS_ANY_SECRET
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};
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private static final int INDEX_MASTER_KEY_ID = 0;
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private static final int INDEX_HAS_ANY_SECRET = 1;
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public BackupOperation(Context context, KeyRepository keyRepository, Progressable
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progressable) {
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super(context, keyRepository, progressable);
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}
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public BackupOperation(Context context, KeyRepository keyRepository,
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Progressable progressable, AtomicBoolean cancelled) {
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super(context, keyRepository, progressable, cancelled);
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}
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@NonNull
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public ExportResult execute(@NonNull BackupKeyringParcel backupInput, @Nullable CryptoInputParcel cryptoInput) {
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return execute(backupInput, cryptoInput, null);
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}
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@NonNull
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public ExportResult execute(@NonNull BackupKeyringParcel backupInput, @Nullable CryptoInputParcel cryptoInput,
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OutputStream outputStream) {
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OperationLog log = new OperationLog();
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if (backupInput.getMasterKeyIds() != null) {
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log.add(LogType.MSG_BACKUP, 0, backupInput.getMasterKeyIds().length);
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} else {
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log.add(LogType.MSG_BACKUP_ALL, 0);
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}
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try {
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Uri plainUri = null;
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OutputStream plainOut;
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if (backupInput.getIsEncrypted()) {
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if (cryptoInput == null) {
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throw new IllegalStateException("Encrypted backup must supply cryptoInput parameter");
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}
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plainUri = TemporaryFileProvider.createFile(mContext);
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plainOut = mContext.getContentResolver().openOutputStream(plainUri);
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} else {
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if (backupInput.getOutputUri() == null || outputStream != null) {
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throw new IllegalArgumentException("Unencrypted export to output stream is not supported!");
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} else {
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plainOut = mContext.getContentResolver().openOutputStream(backupInput.getOutputUri());
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}
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}
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CountingOutputStream outStream = new CountingOutputStream(new BufferedOutputStream(plainOut));
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boolean backupSuccess = exportKeysToStream(
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log, backupInput.getMasterKeyIds(), backupInput.getExportSecret(), outStream);
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if (!backupSuccess) {
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// if there was an error, it will be in the log so we just have to return
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return new ExportResult(ExportResult.RESULT_ERROR, log);
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}
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if (!backupInput.getIsEncrypted()) {
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// log.add(LogType.MSG_EXPORT_NO_ENCRYPT, 1);
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log.add(LogType.MSG_BACKUP_SUCCESS, 1);
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return new ExportResult(ExportResult.RESULT_OK, log);
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}
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long exportedDataSize = outStream.getCount();
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PgpSignEncryptResult encryptResult =
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encryptBackupData(backupInput, cryptoInput, outputStream, plainUri, exportedDataSize);
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if (!encryptResult.success()) {
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log.addByMerge(encryptResult, 1);
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// log.add(LogType.MSG_EXPORT_ERROR_ENCRYPT, 1);
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return new ExportResult(ExportResult.RESULT_ERROR, log);
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}
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log.add(encryptResult, 1);
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log.add(LogType.MSG_BACKUP_SUCCESS, 1);
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return new ExportResult(ExportResult.RESULT_OK, log);
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} catch (FileNotFoundException e) {
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log.add(LogType.MSG_BACKUP_ERROR_URI_OPEN, 1);
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return new ExportResult(ExportResult.RESULT_ERROR, log);
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}
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}
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@NonNull
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private PgpSignEncryptResult encryptBackupData(@NonNull BackupKeyringParcel backupInput,
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@NonNull CryptoInputParcel cryptoInput, @Nullable OutputStream outputStream, Uri plainUri, long exportedDataSize)
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throws FileNotFoundException {
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PgpSignEncryptOperation signEncryptOperation = new PgpSignEncryptOperation(mContext, mKeyRepository, mProgressable, mCancelled);
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PgpSignEncryptData.Builder builder = PgpSignEncryptData.builder();
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builder.setSymmetricPassphrase(cryptoInput.getPassphrase());
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builder.setEnableAsciiArmorOutput(backupInput.getEnableAsciiArmorOutput());
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builder.setAddBackupHeader(true);
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PgpSignEncryptData pgpSignEncryptData = builder.build();
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InputStream inStream = mContext.getContentResolver().openInputStream(plainUri);
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String filename;
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long[] masterKeyIds = backupInput.getMasterKeyIds();
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if (masterKeyIds != null && masterKeyIds.length == 1) {
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filename = Constants.FILE_BACKUP_PREFIX + KeyFormattingUtils.convertKeyIdToHex(
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masterKeyIds[0]);
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} else {
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filename = Constants.FILE_BACKUP_PREFIX + new SimpleDateFormat("yyyy-MM-dd", Locale
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.getDefault()).format(new Date());
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}
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filename += backupInput.getExportSecret() ? Constants.FILE_EXTENSION_BACKUP_SECRET : Constants.FILE_EXTENSION_BACKUP_PUBLIC;
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InputData inputData = new InputData(inStream, exportedDataSize, filename);
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OutputStream outStream;
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if (backupInput.getOutputUri() == null) {
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if (outputStream == null) {
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throw new IllegalArgumentException("If output uri is not set, outputStream must not be null!");
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}
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outStream = outputStream;
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} else {
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if (outputStream != null) {
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throw new IllegalArgumentException("If output uri is set, outputStream must null!");
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}
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outStream = mContext.getContentResolver().openOutputStream(backupInput.getOutputUri());
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}
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return signEncryptOperation.execute(
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pgpSignEncryptData, CryptoInputParcel.createCryptoInputParcel(), inputData, outStream);
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}
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boolean exportKeysToStream(OperationLog log, long[] masterKeyIds, boolean exportSecret, OutputStream outStream) {
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// noinspection unused TODO use these in a log entry
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int okSecret = 0, okPublic = 0;
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int progress = 0;
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Cursor cursor = queryForKeys(masterKeyIds);
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if (cursor == null || !cursor.moveToFirst()) {
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log.add(LogType.MSG_BACKUP_ERROR_DB, 1);
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return false; // new ExportResult(ExportResult.RESULT_ERROR, log);
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}
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try {
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int numKeys = cursor.getCount();
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updateProgress(mContext.getResources().getQuantityString(R.plurals.progress_exporting_key, numKeys),
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0, numKeys);
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// For each public masterKey id
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while (!cursor.isAfterLast()) {
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long masterKeyId = cursor.getLong(INDEX_MASTER_KEY_ID);
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log.add(LogType.MSG_BACKUP_PUBLIC, 1, KeyFormattingUtils.beautifyKeyId(masterKeyId));
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if (writePublicKeyToStream(masterKeyId, log, outStream)) {
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okPublic += 1;
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boolean hasSecret = cursor.getInt(INDEX_HAS_ANY_SECRET) > 0;
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if (exportSecret && hasSecret) {
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log.add(LogType.MSG_BACKUP_SECRET, 2, KeyFormattingUtils.beautifyKeyId(masterKeyId));
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if (writeSecretKeyToStream(masterKeyId, log, outStream)) {
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okSecret += 1;
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}
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}
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}
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updateProgress(progress++, numKeys);
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cursor.moveToNext();
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}
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updateProgress(R.string.progress_done, numKeys, numKeys);
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} catch (IOException e) {
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log.add(LogType.MSG_BACKUP_ERROR_IO, 1);
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return false; // new ExportResult(ExportResult.RESULT_ERROR, log);
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} finally {
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// Make sure the stream is closed
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if (outStream != null) try {
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outStream.close();
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} catch (Exception e) {
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Log.e(Constants.TAG, "error closing stream", e);
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}
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cursor.close();
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}
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return true;
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}
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private boolean writePublicKeyToStream(long masterKeyId, OperationLog log, OutputStream outStream) throws IOException {
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ArmoredOutputStream arOutStream = null;
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try {
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arOutStream = new ArmoredOutputStream(outStream);
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byte[] data = mKeyRepository.loadPublicKeyRingData(masterKeyId);
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UncachedKeyRing uncachedKeyRing = UncachedKeyRing.decodeFromData(data);
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CanonicalizedPublicKeyRing ring = (CanonicalizedPublicKeyRing) uncachedKeyRing.canonicalize(log, 2, true);
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ring.encode(arOutStream);
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} catch (PgpGeneralException | NotFoundException e) {
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log.add(LogType.MSG_UPLOAD_ERROR_IO, 2);
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} finally {
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if (arOutStream != null) {
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arOutStream.close();
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}
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}
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return true;
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}
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private boolean writeSecretKeyToStream(long masterKeyId, OperationLog log, OutputStream outStream)
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throws IOException {
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ArmoredOutputStream arOutStream = null;
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try {
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arOutStream = new ArmoredOutputStream(outStream);
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byte[] data = mKeyRepository.loadSecretKeyRingData(masterKeyId);
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UncachedKeyRing uncachedKeyRing = UncachedKeyRing.decodeFromData(data);
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CanonicalizedSecretKeyRing ring = (CanonicalizedSecretKeyRing) uncachedKeyRing.canonicalize(log, 2, true);
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ring.encode(arOutStream);
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} catch (PgpGeneralException | NotFoundException e) {
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log.add(LogType.MSG_UPLOAD_ERROR_IO, 2);
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} finally {
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if (arOutStream != null) {
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arOutStream.close();
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}
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}
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return true;
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}
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private Cursor queryForKeys(long[] masterKeyIds) {
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String selection = null, selectionArgs[] = null;
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if (masterKeyIds != null) {
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// convert long[] to String[]
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selectionArgs = new String[masterKeyIds.length];
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for (int i = 0; i < masterKeyIds.length; i++) {
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selectionArgs[i] = Long.toString(masterKeyIds[i]);
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}
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// generates ?,?,? as placeholders for selectionArgs
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String placeholders = TextUtils.join(",",
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Collections.nCopies(masterKeyIds.length, "?"));
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// put together selection string
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selection = Tables.KEYS + "." + KeyRings.MASTER_KEY_ID
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+ " IN (" + placeholders + ")";
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}
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return mKeyRepository.getContentResolver().query(
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KeyRings.buildUnifiedKeyRingsUri(), PROJECTION, selection, selectionArgs,
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Tables.KEYS + "." + KeyRings.MASTER_KEY_ID
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);
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}
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} |