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Code Issues Releases Wiki Activity

Fix detection of unarmored data in detached signature verification

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This commit is contained in:
Paul Schaub 2022-02-11 13:58:50 +01:00
parent 9b5cc2da5a
commit 458b4f1f78
3 changed files with 112 additions and 13 deletions
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15
pgpainless-core/src/main/java/org/pgpainless/decryption_verification/DecryptionStreamFactory.java
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@ -46,6 +46,7 @@ import org.pgpainless.algorithm.CompressionAlgorithm;
import org.pgpainless.algorithm.EncryptionPurpose;
import org.pgpainless.algorithm.StreamEncoding;
import org.pgpainless.algorithm.SymmetricKeyAlgorithm;
import org.pgpainless.exception.FinalIOException;
import org.pgpainless.exception.MessageNotIntegrityProtectedException;
import org.pgpainless.exception.MissingDecryptionMethodException;
import org.pgpainless.exception.MissingLiteralDataException;
@ -154,7 +155,7 @@ public final class DecryptionStreamFactory {
objectFactory = ImplementationFactory.getInstance().getPGPObjectFactory(decoderStream);
// Parse OpenPGP message
inputStream = processPGPPackets(objectFactory, 1);
} catch (EOFException e) {
} catch (EOFException | FinalIOException e) {
throw e;
} catch (MissingLiteralDataException e) {
// Not an OpenPGP message.
@ -174,7 +175,7 @@ public final class DecryptionStreamFactory {
objectFactory = ImplementationFactory.getInstance().getPGPObjectFactory(decoderStream);
inputStream = wrapInVerifySignatureStream(bufferedIn, objectFactory);
} else {
throw e;
throw new FinalIOException(e);
}
}
@ -195,6 +196,7 @@ public final class DecryptionStreamFactory {
throw new PGPException("Maximum depth of nested packages exceeded.");
}
Object nextPgpObject;
try {
while ((nextPgpObject = objectFactory.nextObject()) != null) {
if (nextPgpObject instanceof PGPEncryptedDataList) {
return processPGPEncryptedDataList((PGPEncryptedDataList) nextPgpObject, depth);
@ -209,6 +211,15 @@ public final class DecryptionStreamFactory {
return processPGPLiteralData(objectFactory, (PGPLiteralData) nextPgpObject, depth);
}
}
} catch (FinalIOException e) {
throw e;
} catch (IOException e) {
if (depth == 1 && e.getMessage().contains("unknown object in stream:")) {
throw new MissingLiteralDataException("No Literal Data Packet found.");
} else {
throw new FinalIOException(e);
}
}
throw new MissingLiteralDataException("No Literal Data Packet found");
}

17
pgpainless-core/src/main/java/org/pgpainless/exception/FinalIOException.java Normal file
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@ -0,0 +1,17 @@
// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package org.pgpainless.exception;
import java.io.IOException;
/**
* Wrapper for {@link IOException} indicating that we need to throw this exception up.
*/
public class FinalIOException extends IOException {
public FinalIOException(IOException e) {
super(e);
}
}

71
pgpainless-core/src/test/java/org/pgpainless/decryption_verification/VerifyDetachedSignatureTest.java Normal file
View file

@ -0,0 +1,71 @@
// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package org.pgpainless.decryption_verification;
import static org.junit.jupiter.api.Assertions.assertTrue;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import org.bouncycastle.openpgp.PGPException;
import org.bouncycastle.util.io.Streams;
import org.junit.jupiter.api.Test;
import org.pgpainless.PGPainless;
import org.pgpainless.decryption_verification.cleartext_signatures.InMemoryMultiPassStrategy;
public class VerifyDetachedSignatureTest {
@Test
public void verify() throws PGPException, IOException {
String signedContent = "Content-Type: multipart/mixed; boundary=\"OSR6TONWKJD9dgyc2XH5AQPNnAs7pdg1t\"\n" +
"\n" +
"--OSR6TONWKJD9dgyc2XH5AQPNnAs7pdg1t\n" +
"Content-Type: text/plain; charset=utf-8\n" +
"Content-Transfer-Encoding: quoted-printable\n" +
"Content-Language: en-US\n" +
"\n" +
"NOT encrypted + signed(detached)\n" +
"\n" +
"\n" +
"\n" +
"--OSR6TONWKJD9dgyc2XH5AQPNnAs7pdg1t--\n";
String signature = "-----BEGIN PGP SIGNATURE-----\n" +
"\n" +
"iHUEARYIAB0WIQTBZCjWAcs5N4nPYdTDIInNavjWzgUCYgKPzAAKCRDDIInNavjW\n" +
"zmdoAP0TdFt1OWqosHhXxt2hNYqZQMc6bgQRpJNL029nRyzkPAD/SoYJ4T+aYEhw\n" +
"11qrbXloqkr0G3QaA6/zk31RPMI/bgI=\n" +
"=o5Ze\n" +
"-----END PGP SIGNATURE-----\n";
String pubkey = "-----BEGIN PGP PUBLIC KEY BLOCK-----\n" +
"Version: PGPainless\n" +
"\n" +
"mDMEYIucWBYJKwYBBAHaRw8BAQdAew+8mzMWyf3+Pfy49qa60uKV6e5os7de4TdZ\n" +
"ceAWUq+0F2RlbmJvbmQ3QGZsb3djcnlwdC50ZXN0iHgEExYKACAFAmCLnFgCGwMF\n" +
"FgIDAQAECwkIBwUVCgkICwIeAQIZAQAKCRDDIInNavjWzm3JAQCgFgCEyD58iEa/\n" +
"Rw/DYNoQNoZC1lhw1bxBiOcIbtkdBgEAsDFZu3TBavOMKI7KW+vfMBHtRVbkMNpv\n" +
"unaAldoabgO4OARgi5xYEgorBgEEAZdVAQUBAQdAB1/Mrq5JGYim4KqGTSK4OESQ\n" +
"UwPgK56q0yrkiU9WgyYDAQgHiHUEGBYKAB0FAmCLnFgCGwwFFgIDAQAECwkIBwUV\n" +
"CgkICwIeAQAKCRDDIInNavjWzjMgAQCU+R1fItqdY6lt9jXUqipmXuqVaEFPwNA8\n" +
"YJ1rIwDwVQEAyUc8162KWzA2iQB5akwLwNr/pLDDtOWwhLUkrBb3mAc=\n" +
"=pXF6\n" +
"-----END PGP PUBLIC KEY BLOCK-----\n";
DecryptionStream verifier = PGPainless.decryptAndOrVerify()
.onInputStream(new ByteArrayInputStream(signedContent.getBytes(StandardCharsets.UTF_8)))
.withOptions(
new ConsumerOptions()
.addVerificationOfDetachedSignatures(new ByteArrayInputStream(signature.getBytes(StandardCharsets.UTF_8)))
.addVerificationCerts(PGPainless.readKeyRing().keyRingCollection(pubkey, true).getPgpPublicKeyRingCollection())
.setMultiPassStrategy(new InMemoryMultiPassStrategy())
);
Streams.drain(verifier);
verifier.close();
OpenPgpMetadata metadata = verifier.getResult();
assertTrue(metadata.isVerified());
}
}