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Code Issues Releases Wiki Activity

WIP: Play around with TeeInputStreams

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This commit is contained in:
Paul Schaub 2022-09-23 14:04:44 +02:00
parent 61949240b3
commit a3957d3372
3 changed files with 121 additions and 5 deletions
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33
pgpainless-core/src/main/java/org/pgpainless/decryption_verification/OpenPgpMessageInputStream.java
View file

@ -343,7 +343,8 @@ public class OpenPgpMessageInputStream extends InputStream {
return null;
}
private PGPOnePassSignatureList readOnePassSignatures() throws IOException {
private PGPOnePassSignatureListWrapper readOnePassSignatures() throws IOException {
List<Boolean> encapsulating = new ArrayList<>();
ByteArrayOutputStream buf = new ByteArrayOutputStream();
BCPGOutputStream bcpgOut = new BCPGOutputStream(buf);
int tag;
@ -351,14 +352,16 @@ public class OpenPgpMessageInputStream extends InputStream {
Packet packet = bcpgIn.readPacket();
if (tag == PacketTags.ONE_PASS_SIGNATURE) {
OnePassSignaturePacket sigPacket = (OnePassSignaturePacket) packet;
sigPacket.encode(bcpgOut);
byte[] bytes = sigPacket.getEncoded();
encapsulating.add(bytes[bytes.length - 1] == 1);
bcpgOut.write(bytes);
}
}
bcpgOut.close();
PGPObjectFactory objectFactory = ImplementationFactory.getInstance().getPGPObjectFactory(buf.toByteArray());
PGPOnePassSignatureList signatureList = (PGPOnePassSignatureList) objectFactory.nextObject();
return signatureList;
return new PGPOnePassSignatureListWrapper(signatureList, encapsulating);
}
private PGPSignatureList readSignatures() throws IOException {
@ -490,6 +493,26 @@ public class OpenPgpMessageInputStream extends InputStream {
}
}
/**
* Workaround for BC not exposing, whether an OPS is encapsulating or not.
* TODO: Remove once our PR is merged
*
* @see <a href="https://github.com/bcgit/bc-java/pull/1232">PR against BC</a>
*/
private static class PGPOnePassSignatureListWrapper {
private final PGPOnePassSignatureList list;
private final List<Boolean> encapsulating;
public PGPOnePassSignatureListWrapper(PGPOnePassSignatureList signatures, List<Boolean> encapsulating) {
this.list = signatures;
this.encapsulating = encapsulating;
}
public int size() {
return list.size();
}
}
private static class Signatures {
final ConsumerOptions options;
List<PGPSignature> detachedSignatures = new ArrayList<>();
@ -521,9 +544,9 @@ public class OpenPgpMessageInputStream extends InputStream {
}
}
void addOnePassSignatures(PGPOnePassSignatureList signatures) {
void addOnePassSignatures(PGPOnePassSignatureListWrapper signatures) {
System.out.println("Adding " + signatures.size() + " OPSs");
for (PGPOnePassSignature ops : signatures) {
for (PGPOnePassSignature ops : signatures.list) {
PGPPublicKeyRing certificate = findCertificate(ops.getKeyID());
initialize(ops, certificate);
this.onePassSignatures.add(ops);

35
pgpainless-core/src/main/java/org/pgpainless/decryption_verification/TeeBCPGInputStream.java Normal file
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@ -0,0 +1,35 @@
package org.pgpainless.decryption_verification;
import org.bouncycastle.bcpg.BCPGInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
public class TeeBCPGInputStream extends BCPGInputStream {
private final OutputStream out;
public TeeBCPGInputStream(InputStream in, OutputStream outputStream) {
super(in);
this.out = outputStream;
}
@Override
public int read() throws IOException {
int r = super.read();
if (r != -1) {
out.write(r);
}
return r;
}
@Override
public int read(byte[] buf, int off, int len) throws IOException {
int r = super.read(buf, off, len);
if (r > 0) {
out.write(buf, off, r);
}
return r;
}
}

58
pgpainless-core/src/test/java/org/pgpainless/decryption_verification/TeeBCPGInputStreamTest.java Normal file
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@ -0,0 +1,58 @@
package org.pgpainless.decryption_verification;
import org.bouncycastle.bcpg.ArmoredInputStream;
import org.bouncycastle.bcpg.ArmoredOutputStream;
import org.bouncycastle.bcpg.BCPGInputStream;
import org.bouncycastle.bcpg.Packet;
import org.bouncycastle.openpgp.PGPCompressedData;
import org.bouncycastle.openpgp.PGPException;
import org.junit.jupiter.api.Test;
import org.pgpainless.algorithm.OpenPgpPacket;
import org.pgpainless.util.ArmoredInputStreamFactory;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
public class TeeBCPGInputStreamTest {
private static final String INBAND_SIGNED = "-----BEGIN PGP MESSAGE-----\n" +
"Version: PGPainless\n" +
"\n" +
"owGbwMvMyCUWdXSHvVTUtXbG0yJJDCDgkZqTk6+jEJ5flJOiyNVRysIoxsXAxsqU\n" +
"GDiVjUGRUwCmQUyRRWnOn9Z/PIseF3Yz6cCEL05nZDj1OClo75WVTjNmJPemW6qV\n" +
"6ki//1K1++2s0qTP+0N11O4z/BVLDDdxnmQryS+5VXjBX7/0Hxnm/eqeX6Zum35r\n" +
"M8e7ufwA\n" +
"=RDiy\n" +
"-----END PGP MESSAGE-----";
@Test
public void test() throws IOException, PGPException {
ByteArrayOutputStream out = new ByteArrayOutputStream();
ArmoredOutputStream armorOut = new ArmoredOutputStream(out);
ByteArrayInputStream bytesIn = new ByteArrayInputStream(INBAND_SIGNED.getBytes(StandardCharsets.UTF_8));
ArmoredInputStream armorIn = ArmoredInputStreamFactory.get(bytesIn);
BCPGInputStream bcpgIn = new BCPGInputStream(armorIn);
TeeBCPGInputStream teeIn = new TeeBCPGInputStream(bcpgIn, armorOut);
ByteArrayOutputStream nestedOut = new ByteArrayOutputStream();
ArmoredOutputStream nestedArmorOut = new ArmoredOutputStream(nestedOut);
PGPCompressedData compressedData = new PGPCompressedData(teeIn);
InputStream nestedStream = compressedData.getDataStream();
BCPGInputStream nestedBcpgIn = new BCPGInputStream(nestedStream);
TeeBCPGInputStream nestedTeeIn = new TeeBCPGInputStream(nestedBcpgIn, nestedArmorOut);
int tag;
while ((tag = nestedTeeIn.nextPacketTag()) != -1) {
System.out.println(OpenPgpPacket.requireFromTag(tag));
Packet packet = nestedTeeIn.readPacket();
}
nestedArmorOut.close();
System.out.println(nestedOut);
}
}