sop-java/external-sop/src/main/java/sop/external/operation/InlineDetachExternal.java

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// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package sop.external.operation;
import sop.ReadyWithResult;
import sop.Signatures;
import sop.exception.SOPGPException;
import sop.external.ExternalSOP;
import sop.operation.InlineDetach;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
public class InlineDetachExternal implements InlineDetach {
private final ExternalSOP.TempDirProvider tempDirProvider;
private final List<String> commandList = new ArrayList<>();
private final List<String> envList;
public InlineDetachExternal(String binary, Properties environment, ExternalSOP.TempDirProvider tempDirProvider) {
this.tempDirProvider = tempDirProvider;
commandList.add(binary);
commandList.add("inline-detach");
envList = ExternalSOP.propertiesToEnv(environment);
}
@Override
public InlineDetach noArmor() {
commandList.add("--no-armor");
return this;
}
@Override
public ReadyWithResult<Signatures> message(InputStream messageInputStream) throws IOException, SOPGPException.BadData {
File tempDir = tempDirProvider.provideTempDirectory();
File signaturesOut = new File(tempDir, "signatures");
signaturesOut.delete();
commandList.add("--signatures-out=" + signaturesOut.getAbsolutePath());
String[] command = commandList.toArray(new String[0]);
String[] env = envList.toArray(new String[0]);
try {
Process process = Runtime.getRuntime().exec(command, env);
OutputStream processOut = process.getOutputStream();
InputStream processIn = process.getInputStream();
return new ReadyWithResult<Signatures>() {
@Override
public Signatures writeTo(OutputStream outputStream) throws IOException {
byte[] buf = new byte[4096];
int r;
while ((r = messageInputStream.read(buf)) > 0) {
processOut.write(buf, 0, r);
}
messageInputStream.close();
processOut.close();
while ((r = processIn.read(buf)) > 0) {
outputStream.write(buf, 0 , r);
}
processIn.close();
outputStream.close();
ExternalSOP.finish(process);
FileInputStream signaturesOutIn = new FileInputStream(signaturesOut);
ByteArrayOutputStream signaturesBuffer = new ByteArrayOutputStream();
while ((r = signaturesOutIn.read(buf)) > 0) {
signaturesBuffer.write(buf, 0, r);
}
signaturesOutIn.close();
signaturesOut.delete();
final byte[] sigBytes = signaturesBuffer.toByteArray();
return new Signatures() {
@Override
public void writeTo(OutputStream signatureOutputStream) throws IOException {
signatureOutputStream.write(sigBytes);
}
};
}
};
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}