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/*
* Copyright (C) 2015 Dominik Schürmann <dominik@dominikschuermann.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.sufficientlysecure.keychain.operations;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import android.content.Context;
import android.net.Uri;
import android.support.annotation.NonNull;
import org.apache.james.mime4j.MimeException;
import org.apache.james.mime4j.codec.DecodeMonitor;
import org.apache.james.mime4j.dom.FieldParser;
import org.apache.james.mime4j.dom.field.ContentDispositionField;
import org.apache.james.mime4j.field.DefaultFieldParser;
import org.apache.james.mime4j.parser.AbstractContentHandler;
import org.apache.james.mime4j.parser.MimeStreamParser;
import org.apache.james.mime4j.stream.BodyDescriptor;
import org.apache.james.mime4j.stream.Field;
import org.apache.james.mime4j.stream.MimeConfig;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.operations.results.DecryptVerifyResult;
import org.sufficientlysecure.keychain.operations.results.InputDataResult;
import org.sufficientlysecure.keychain.operations.results.OperationResult.LogType;
import org.sufficientlysecure.keychain.operations.results.OperationResult.OperationLog;
import org.sufficientlysecure.keychain.pgp.PgpDecryptVerifyInputParcel;
import org.sufficientlysecure.keychain.pgp.PgpDecryptVerifyOperation;
import org.sufficientlysecure.keychain.pgp.Progressable;
import org.sufficientlysecure.keychain.provider.ProviderHelper;
import org.sufficientlysecure.keychain.provider.TemporaryStorageProvider;
import org.sufficientlysecure.keychain.service.InputDataParcel;
import org.sufficientlysecure.keychain.service.input.CryptoInputParcel;
import org.sufficientlysecure.keychain.util.Log;
/** This operation deals with input data, trying to determine its type as it goes. */
public class InputDataOperation extends BaseOperation<InputDataParcel> {
final private byte[] buf = new byte[256];
public InputDataOperation(Context context, ProviderHelper providerHelper, Progressable progressable) {
super(context, providerHelper, progressable);
}
@NonNull
@Override
public InputDataResult execute(InputDataParcel input,
CryptoInputParcel cryptoInput) {
final OperationLog log = new OperationLog();
log.add(LogType.MSG_MIME_PARSING, 0);
Uri currentUri;
PgpDecryptVerifyInputParcel decryptInput = input.getDecryptInput();
if (decryptInput != null) {
PgpDecryptVerifyOperation op =
new PgpDecryptVerifyOperation(mContext, mProviderHelper, mProgressable);
decryptInput.setInputUri(input.getInputUri());
currentUri = TemporaryStorageProvider.createFile(mContext);
decryptInput.setOutputUri(currentUri);
DecryptVerifyResult result = op.execute(decryptInput, cryptoInput);
if (result.isPending()) {
return new InputDataResult(log, result);
}
} else {
currentUri = input.getInputUri();
}
// If we aren't supposed to attempt mime decode, we are done here
if (!input.getMimeDecode()) {
ArrayList<Uri> uris = new ArrayList<>();
uris.add(currentUri);
return new InputDataResult(InputDataResult.RESULT_OK, log, uris);
}
try {
InputStream in = mContext.getContentResolver().openInputStream(currentUri);
MimeStreamParser parser = new MimeStreamParser((MimeConfig) null);
final ArrayList<Uri> outputUris = new ArrayList<>();
parser.setContentDecoding(true);
parser.setRecurse();
parser.setContentHandler(new AbstractContentHandler() {
String mFilename;
@Override
public void startHeader() throws MimeException {
mFilename = null;
}
@Override
public void field(Field field) throws MimeException {
field = DefaultFieldParser.getParser().parse(field, DecodeMonitor.SILENT);
if (field instanceof ContentDispositionField) {
mFilename = ((ContentDispositionField) field).getFilename();
}
}
@Override
public void body(BodyDescriptor bd, InputStream is) throws MimeException, IOException {
// log.add(LogType.MSG_MIME_PART, 0, bd.getMimeType());
Uri uri = TemporaryStorageProvider.createFile(mContext, mFilename, bd.getMimeType());
OutputStream out = mContext.getContentResolver().openOutputStream(uri, "w");
if (out == null) {
Log.e(Constants.TAG, "error!");
return;
}
int len;
while ( (len = is.read(buf)) > 0) {
out.write(buf, 0, len);
}
out.close();
outputUris.add(uri);
}
});
parser.parse(in);
log.add(LogType.MSG_MIME_PARSING_SUCCESS, 1);
return new InputDataResult(InputDataResult.RESULT_OK, log, outputUris);
} catch (FileNotFoundException e) {
e.printStackTrace();
return new InputDataResult(InputDataResult.RESULT_ERROR, log, null);
} catch (MimeException e) {
e.printStackTrace();
return new InputDataResult(InputDataResult.RESULT_ERROR, log, null);
} catch (IOException e) {
e.printStackTrace();
return new InputDataResult(InputDataResult.RESULT_ERROR, log, null);
}
}
}
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