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Merge branch 'fix298'

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This commit is contained in:
Paul Schaub 2022-07-16 12:37:20 +02:00
commit 6fc1d25db8
3 changed files with 232 additions and 1 deletions
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51
pgpainless-core/src/main/java/org/pgpainless/key/modification/secretkeyring/SecretKeyRingEditor.java
View file

@ -205,12 +205,61 @@ public class SecretKeyRingEditor implements SecretKeyRingEditorInterface {
@Override
public SecretKeyRingEditorInterface removeUserId(
CharSequence userId,
SecretKeyRingProtector protector) throws PGPException {
SecretKeyRingProtector protector)
throws PGPException {
return removeUserId(
SelectUserId.exactMatch(userId.toString()),
protector);
}
@Override
public SecretKeyRingEditorInterface replaceUserId(@Nonnull CharSequence oldUserId,
@Nonnull CharSequence newUserId,
@Nonnull SecretKeyRingProtector protector)
throws PGPException {
String oldUID = oldUserId.toString().trim();
String newUID = newUserId.toString().trim();
if (oldUID.isEmpty()) {
throw new IllegalArgumentException("Old user-id cannot be empty.");
}
if (newUID.isEmpty()) {
throw new IllegalArgumentException("New user-id cannot be empty.");
}
KeyRingInfo info = PGPainless.inspectKeyRing(secretKeyRing);
if (!info.isUserIdValid(oldUID)) {
throw new NoSuchElementException("Key does not carry user-id '" + oldUID + "', or it is not valid.");
}
PGPSignature oldCertification = info.getLatestUserIdCertification(oldUID);
if (oldCertification == null) {
throw new AssertionError("Certification for old user-id MUST NOT be null.");
}
// Bind new user-id
addUserId(newUserId, new SelfSignatureSubpackets.Callback() {
@Override
public void modifyHashedSubpackets(SelfSignatureSubpackets hashedSubpackets) {
SignatureSubpacketsHelper.applyFrom(oldCertification.getHashedSubPackets(), (SignatureSubpackets) hashedSubpackets);
// Primary user-id
if (oldUID.equals(info.getPrimaryUserId())) {
// Implicit primary user-id
if (!oldCertification.getHashedSubPackets().isPrimaryUserID()) {
hashedSubpackets.setPrimaryUserId();
}
}
}
@Override
public void modifyUnhashedSubpackets(SelfSignatureSubpackets unhashedSubpackets) {
SignatureSubpacketsHelper.applyFrom(oldCertification.getUnhashedSubPackets(), (SignatureSubpackets) unhashedSubpackets);
}
}, protector);
return revokeUserId(oldUID, protector);
}
// TODO: Move to utility class?
private String sanitizeUserId(@Nonnull CharSequence userId) {
// TODO: Further research how to sanitize user IDs.

20
pgpainless-core/src/main/java/org/pgpainless/key/modification/secretkeyring/SecretKeyRingEditorInterface.java
View file

@ -104,6 +104,26 @@ public interface SecretKeyRingEditorInterface {
SecretKeyRingProtector protector)
throws PGPException;
/**
* Replace a user-id on the key with a new one.
* The old user-id gets soft revoked and the new user-id gets bound with the same signature subpackets as the
* old one, with one exception:
* If the old user-id was implicitly primary (did not carry a {@link org.bouncycastle.bcpg.sig.PrimaryUserID} packet,
* but effectively was primary, then the new user-id will be explicitly marked as primary.
*
* @param oldUserId old user-id
* @param newUserId new user-id
* @param protector protector to unlock the secret key
* @return the builder
* @throws PGPException in case we cannot generate a revocation and certification signature
* @throws java.util.NoSuchElementException if the old user-id was not found on the key; or if the oldUserId
* was already invalid
*/
SecretKeyRingEditorInterface replaceUserId(CharSequence oldUserId,
CharSequence newUserId,
SecretKeyRingProtector protector)
throws PGPException;
/**
* Add a subkey to the key ring.
* The subkey will be generated from the provided {@link KeySpec}.

162
pgpainless-core/src/test/java/org/pgpainless/key/modification/FixUserIdDoesNotBreakEncryptionCapabilityTest.java Normal file
View file

@ -0,0 +1,162 @@
// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package org.pgpainless.key.modification;
import org.bouncycastle.openpgp.PGPException;
import org.bouncycastle.openpgp.PGPPublicKeyRing;
import org.bouncycastle.openpgp.PGPSecretKeyRing;
import org.bouncycastle.util.io.Streams;
import org.junit.jupiter.api.Test;
import org.pgpainless.PGPainless;
import org.pgpainless.decryption_verification.ConsumerOptions;
import org.pgpainless.decryption_verification.DecryptionStream;
import org.pgpainless.decryption_verification.OpenPgpMetadata;
import org.pgpainless.encryption_signing.EncryptionOptions;
import org.pgpainless.encryption_signing.EncryptionResult;
import org.pgpainless.encryption_signing.EncryptionStream;
import org.pgpainless.encryption_signing.ProducerOptions;
import org.pgpainless.key.info.KeyRingInfo;
import org.pgpainless.key.protection.SecretKeyRingProtector;
import org.pgpainless.signature.subpackets.SelfSignatureSubpackets;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.NoSuchElementException;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;
/**
* Test for #298.
*/
public class FixUserIdDoesNotBreakEncryptionCapabilityTest {
private static final String SECRET_KEY = "-----BEGIN PGP PRIVATE KEY BLOCK-----\n" +
"\n" +
"lFgEYsyc4hYJKwYBBAHaRw8BAQdAjm3bQ61H2E6/xzjjHjl6G+mNl72r7fwdux9f\n" +
"CXQrCpoAAQDwY5Vblm+7Dq8NfP5gqThyv+23aMBYLr3UgJAZyAgu/RDBtCQoQilv\n" +
"YiAoSilvaG5zb24gPGJqQGV2YWx1YXRpb24udGVzdD6IkAQTFggAOBYhBI70BlHo\n" +
"XvYV3ufIc8MDl+w8xmx4BQJizJziAhsjBQsJCAcCBhUKCQgLAgQWAgMBAh4BAheA\n" +
"AAoJEMMDl+w8xmx4ZAMBAIZsBqoClMlwymvNWIENCAZMQSy9NpBABk3jDyEjbhgs\n" +
"AP9sGI7URQNUDXiV+sIzvastNX/nOZ7fkwp6Xrx+74WxC5xdBGLMnOISCisGAQQB\n" +
"l1UBBQEBB0CGU2EGdS4mvy0apuPukStWSqEDH16AFSGEeTt2GyN1IQMBCAcAAP9J\n" +
"nrIGndqzxxIUHVsoImYIu9SFl9Z1tCSia6mADTtbsA88iHgEGBYIACAWIQSO9AZR\n" +
"6F72Fd7nyHPDA5fsPMZseAUCYsyc4gIbDAAKCRDDA5fsPMZseACnAQDIR7QwBTIs\n" +
"Hfu4XIpZTyipOy6ZOEKlY3akyb9TtOq1wAD8Da+0Insssuf0J5WPqShJ/wMX3+xk\n" +
"gqeRV2HyogQ7aAE=\n" +
"=6zZo\n" +
"-----END PGP PRIVATE KEY BLOCK-----\n";
private static final String CERTIFICATE = "-----BEGIN PGP PUBLIC KEY BLOCK-----\n" +
"\n" +
"mDMEYsyc4hYJKwYBBAHaRw8BAQdAjm3bQ61H2E6/xzjjHjl6G+mNl72r7fwdux9f\n" +
"CXQrCpq0JChCKW9iIChKKW9obnNvbiA8YmpAZXZhbHVhdGlvbi50ZXN0PoiQBBMW\n" +
"CAA4FiEEjvQGUehe9hXe58hzwwOX7DzGbHgFAmLMnOICGyMFCwkIBwIGFQoJCAsC\n" +
"BBYCAwECHgECF4AACgkQwwOX7DzGbHhkAwEAhmwGqgKUyXDKa81YgQ0IBkxBLL02\n" +
"kEAGTeMPISNuGCwA/2wYjtRFA1QNeJX6wjO9qy01f+c5nt+TCnpevH7vhbELuDgE\n" +
"Ysyc4hIKKwYBBAGXVQEFAQEHQIZTYQZ1Lia/LRqm4+6RK1ZKoQMfXoAVIYR5O3Yb\n" +
"I3UhAwEIB4h4BBgWCAAgFiEEjvQGUehe9hXe58hzwwOX7DzGbHgFAmLMnOICGwwA\n" +
"CgkQwwOX7DzGbHgApwEAyEe0MAUyLB37uFyKWU8oqTsumThCpWN2pMm/U7TqtcAA\n" +
"/A2vtCJ7LLLn9CeVj6koSf8DF9/sZIKnkVdh8qIEO2gB\n" +
"=3sNT\n" +
"-----END PGP PUBLIC KEY BLOCK-----";
private static final String userIdBefore = "(B)ob (J)ohnson <bj@evaluation.test>";
private static final String userIdAfter = "\"(B)ob (J)ohnson\" <bj@evaluation.test>";
@Test
public void manualReplaceUserIdWithFixedVersionDoesNotHinderEncryptionCapability() throws IOException, PGPException {
PGPSecretKeyRing secretKeys = PGPainless.readKeyRing().secretKeyRing(SECRET_KEY);
SecretKeyRingProtector protector = SecretKeyRingProtector.unprotectedKeys();
PGPSecretKeyRing modified = PGPainless.modifyKeyRing(secretKeys)
.addUserId(userIdAfter, new SelfSignatureSubpackets.Callback() {
@Override
public void modifyHashedSubpackets(SelfSignatureSubpackets hashedSubpackets) {
hashedSubpackets.setPrimaryUserId();
}
}, protector)
.removeUserId(userIdBefore, protector)
.done();
KeyRingInfo before = PGPainless.inspectKeyRing(secretKeys);
KeyRingInfo after = PGPainless.inspectKeyRing(modified);
assertTrue(before.isUsableForEncryption());
assertTrue(before.isUsableForSigning());
assertTrue(before.isUserIdValid(userIdBefore));
assertFalse(before.isUserIdValid(userIdAfter));
assertTrue(after.isUsableForEncryption());
assertTrue(after.isUsableForSigning());
assertFalse(after.isUserIdValid(userIdBefore));
assertTrue(after.isUserIdValid(userIdAfter));
}
@Test
public void testReplaceUserId_missingOldUserIdThrows() throws IOException {
PGPSecretKeyRing secretKeys = PGPainless.readKeyRing().secretKeyRing(SECRET_KEY);
assertThrows(NoSuchElementException.class, () -> PGPainless.modifyKeyRing(secretKeys)
.replaceUserId("missing", userIdAfter, SecretKeyRingProtector.unprotectedKeys()));
}
@Test
public void testReplaceUserId_emptyOldUserIdThrows() throws IOException {
PGPSecretKeyRing secretKeys = PGPainless.readKeyRing().secretKeyRing(SECRET_KEY);
assertThrows(IllegalArgumentException.class, () -> PGPainless.modifyKeyRing(secretKeys)
.replaceUserId(" ", userIdAfter, SecretKeyRingProtector.unprotectedKeys()));
}
@Test
public void testReplaceUserId_emptyNewUserIdThrows() throws IOException {
PGPSecretKeyRing secretKeys = PGPainless.readKeyRing().secretKeyRing(SECRET_KEY);
assertThrows(IllegalArgumentException.class, () -> PGPainless.modifyKeyRing(secretKeys)
.replaceUserId(userIdBefore, " ", SecretKeyRingProtector.unprotectedKeys()));
}
@Test
public void testReplaceImplicitUserIdDoesNotBreakStuff() throws IOException, PGPException {
PGPSecretKeyRing secretKeys = PGPainless.readKeyRing().secretKeyRing(SECRET_KEY);
PGPSecretKeyRing edited = PGPainless.modifyKeyRing(secretKeys)
.replaceUserId(userIdBefore, userIdAfter, SecretKeyRingProtector.unprotectedKeys())
.done();
KeyRingInfo info = PGPainless.inspectKeyRing(edited);
assertTrue(info.isUserIdValid(userIdAfter));
assertEquals(userIdAfter, info.getPrimaryUserId());
assertTrue(info.getLatestUserIdCertification(userIdAfter).getHashedSubPackets().isPrimaryUserID());
PGPPublicKeyRing cert = PGPainless.extractCertificate(edited);
ByteArrayOutputStream out = new ByteArrayOutputStream();
EncryptionStream encryptionStream = PGPainless.encryptAndOrSign()
.onOutputStream(out)
.withOptions(ProducerOptions.encrypt(new EncryptionOptions()
.addRecipient(cert)));
encryptionStream.write("Hello".getBytes(StandardCharsets.UTF_8));
encryptionStream.close();
EncryptionResult result = encryptionStream.getResult();
assertTrue(result.isEncryptedFor(cert));
ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
ByteArrayOutputStream plain = new ByteArrayOutputStream();
DecryptionStream decryptionStream = PGPainless.decryptAndOrVerify()
.onInputStream(in)
.withOptions(new ConsumerOptions()
.addDecryptionKey(edited));
Streams.pipeAll(decryptionStream, plain);
decryptionStream.close();
OpenPgpMetadata metadata = decryptionStream.getResult();
assertTrue(metadata.isEncrypted());
}
}