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Code Issues Releases Wiki Activity

Fix changing of expiration dates for keys and subkeys

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This commit is contained in:
Paul Schaub 2021-01-18 17:09:57 +01:00
parent bf8e29caa4
commit b25a78bc29
Signed by: vanitasvitae
GPG key ID: 62BEE9264BF17311
3 changed files with 148 additions and 44 deletions
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132
pgpainless-core/src/main/java/org/pgpainless/key/modification/secretkeyring/SecretKeyRingEditor.java
View file

@ -62,6 +62,7 @@ import org.pgpainless.key.util.KeyRingUtils;
import org.pgpainless.key.util.RevocationAttributes;
import org.pgpainless.key.util.SignatureUtils;
import org.pgpainless.util.Passphrase;
import org.pgpainless.util.SignatureSubpacketGeneratorUtil;
public class SecretKeyRingEditor implements SecretKeyRingEditorInterface {
@ -287,57 +288,120 @@ public class SecretKeyRingEditor implements SecretKeyRingEditorInterface {
return this;
}
@Override
public SecretKeyRingEditorInterface setExpirationDate(Date expiration,
SecretKeyRingProtector secretKeyRingProtector)
throws PGPException {
return setExpirationDate(new OpenPgpV4Fingerprint(secretKeyRing), expiration, secretKeyRingProtector);
}
@Override
public SecretKeyRingEditorInterface setExpirationDate(OpenPgpV4Fingerprint fingerprint,
Date expiration,
SecretKeyRingProtector secretKeyRingProtector)
throws PGPException {
Iterator<PGPSecretKey> secretKeyIterator = secretKeyRing.getSecretKeys();
if (!secretKeyIterator.hasNext()) {
throw new NoSuchElementException("No secret keys in the ring.");
}
PGPSecretKey secretKey = secretKeyIterator.next();
PGPPublicKey publicKey = secretKey.getPublicKey();
if (!new OpenPgpV4Fingerprint(publicKey).equals(fingerprint)) {
throw new IllegalArgumentException("Currently it is possible to adjust expiration date for primary key only.");
}
List<PGPSecretKey> secretKeyList = new ArrayList<>();
PGPPrivateKey privateKey = unlockSecretKey(secretKey, secretKeyRingProtector);
PGPSecretKey primaryKey = secretKeyRing.getSecretKey();
PGPSignatureGenerator signatureGenerator = SignatureUtils.getSignatureGeneratorFor(primaryKey);
PGPSignatureSubpacketGenerator subpacketGenerator = new PGPSignatureSubpacketGenerator();
long secondsToExpire = 0; // 0 means "no expiration"
if (expiration != null) {
secondsToExpire = (expiration.getTime() - primaryKey.getPublicKey().getCreationTime().getTime()) / 1000;
}
subpacketGenerator.setKeyExpirationTime(false, secondsToExpire);
PGPSignatureSubpacketVector subPackets = subpacketGenerator.generate();
signatureGenerator.setHashedSubpackets(subPackets);
signatureGenerator.init(PGPSignature.POSITIVE_CERTIFICATION, privateKey);
Iterator<String> users = publicKey.getUserIDs();
while (users.hasNext()) {
String user = users.next();
PGPSignature signature = signatureGenerator.generateCertification(user, primaryKey.getPublicKey());
publicKey = PGPPublicKey.addCertification(publicKey, user, signature);
if (!primaryKey.isMasterKey()) {
throw new IllegalArgumentException("Key Ring does not appear to contain a primary secret key.");
}
secretKey = PGPSecretKey.replacePublicKey(secretKey, publicKey);
boolean found = false;
Iterator<PGPSecretKey> iterator = secretKeyRing.iterator();
while (iterator.hasNext()) {
PGPSecretKey secretKey = iterator.next();
// Skip over unaffected subkeys
if (secretKey.getKeyID() != fingerprint.getKeyId()) {
secretKeyList.add(secretKey);
continue;
}
// We found the target subkey
found = true;
secretKey = setExpirationDate(primaryKey, secretKey, expiration, secretKeyRingProtector);
secretKeyList.add(secretKey);
}
if (!found) {
throw new IllegalArgumentException("Key Ring does not contain secret key with fingerprint " + fingerprint);
}
secretKeyRing = new PGPSecretKeyRing(secretKeyList);
return this;
}
private PGPSecretKey setExpirationDate(PGPSecretKey primaryKey,
PGPSecretKey subjectKey,
Date expiration,
SecretKeyRingProtector secretKeyRingProtector)
throws PGPException {
if (expiration != null && expiration.before(subjectKey.getPublicKey().getCreationTime())) {
throw new IllegalArgumentException("Expiration date cannot be before creation date.");
}
PGPPrivateKey privateKey = KeyRingUtils.unlockSecretKey(primaryKey, secretKeyRingProtector);
PGPPublicKey subjectPubKey = subjectKey.getPublicKey();
PGPSignature oldSignature = getPreviousSignature(primaryKey, subjectPubKey);
PGPSignatureSubpacketVector oldSubpackets = oldSignature.getHashedSubPackets();
PGPSignatureSubpacketGenerator subpacketGenerator = new PGPSignatureSubpacketGenerator(oldSubpackets);
SignatureSubpacketGeneratorUtil.setSignatureCreationTimeInSubpacketGenerator(new Date(), subpacketGenerator);
SignatureSubpacketGeneratorUtil.setExpirationDateInSubpacketGenerator(expiration, subjectPubKey.getCreationTime(), subpacketGenerator);
PGPSignatureGenerator signatureGenerator = SignatureUtils.getSignatureGeneratorFor(primaryKey);
signatureGenerator.setHashedSubpackets(subpacketGenerator.generate());
if (primaryKey.getKeyID() == subjectKey.getKeyID()) {
signatureGenerator.init(PGPSignature.POSITIVE_CERTIFICATION, privateKey);
for (Iterator<String> it = subjectKey.getUserIDs(); it.hasNext(); ) {
String userId = it.next();
PGPSignature signature = signatureGenerator.generateCertification(userId, subjectPubKey);
subjectPubKey = PGPPublicKey.addCertification(subjectPubKey, userId, signature);
}
} else {
signatureGenerator.init(PGPSignature.SUBKEY_BINDING, privateKey);
PGPSignature signature = signatureGenerator.generateCertification(primaryKey.getPublicKey(), subjectPubKey);
subjectPubKey = PGPPublicKey.addCertification(subjectPubKey, signature);
}
subjectKey = PGPSecretKey.replacePublicKey(subjectKey, subjectPubKey);
return subjectKey;
}
private PGPSignature getPreviousSignature(PGPSecretKey primaryKey, PGPPublicKey subjectPubKey) {
PGPSignature oldSignature = null;
if (primaryKey.getKeyID() == subjectPubKey.getKeyID()) {
Iterator<PGPSignature> keySignatures = subjectPubKey.getSignaturesForKeyID(primaryKey.getKeyID());
while (keySignatures.hasNext()) {
PGPSignature next = keySignatures.next();
if (next.getSignatureType() == PGPSignature.POSITIVE_CERTIFICATION) {
oldSignature = next;
}
}
if (oldSignature == null) {
throw new IllegalStateException("Key " + new OpenPgpV4Fingerprint(subjectPubKey) + " does not have a previous positive signature.");
}
} else {
Iterator bindingSignatures = subjectPubKey.getSignaturesOfType(SignatureType.SUBKEY_BINDING.getCode());
while (bindingSignatures.hasNext()) {
oldSignature = (PGPSignature) bindingSignatures.next();
}
}
if (oldSignature == null) {
throw new IllegalStateException("Key " + new OpenPgpV4Fingerprint(subjectPubKey) + " does not have a previous subkey binding signature.");
}
return oldSignature;
}
@Override
public PGPSignature createRevocationCertificate(OpenPgpV4Fingerprint fingerprint,
SecretKeyRingProtector secretKeyRingProtector,

6
pgpainless-core/src/main/java/org/pgpainless/key/modification/secretkeyring/SecretKeyRingEditorInterface.java
View file

@ -15,9 +15,9 @@
*/
package org.pgpainless.key.modification.secretkeyring;
import java.util.Date;
import java.security.InvalidAlgorithmParameterException;
import java.security.NoSuchAlgorithmException;
import java.util.Date;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
@ -198,6 +198,10 @@ public interface SecretKeyRingEditorInterface {
RevocationAttributes revocationAttributes)
throws PGPException;
SecretKeyRingEditorInterface setExpirationDate(Date expiration,
SecretKeyRingProtector secretKeyRingProtector)
throws PGPException;
/**
* Set key expiration time.
*

52
pgpainless-core/src/test/java/org/pgpainless/key/modification/ChangeExpirationTest.java
View file

@ -1,5 +1,5 @@
/*
* Copyright 2020 Paul Schaub.
* Copyright 2021 Paul Schaub.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -33,28 +33,64 @@ import java.util.Date;
public class ChangeExpirationTest {
@Test
public void setExpirationDateAndThenUnsetIt() throws PGPException, IOException, InterruptedException {
PGPSecretKeyRing secretKeys = TestKeys.getEmilSecretKeyRing();
private final OpenPgpV4Fingerprint subKeyFingerprint = new OpenPgpV4Fingerprint("F73FDE6439ABE210B1AF4EDD273EF7A0C749807B");
@Test
public void setExpirationDateAndThenUnsetIt_OnPrimaryKey() throws PGPException, IOException, InterruptedException {
PGPSecretKeyRing secretKeys = TestKeys.getEmilSecretKeyRing();
KeyRingInfo sInfo = PGPainless.inspectKeyRing(secretKeys);
OpenPgpV4Fingerprint fingerprint = sInfo.getFingerprint();
assertNull(sInfo.getExpirationDate());
assertNull(sInfo.getExpirationDate(subKeyFingerprint));
Date date = new Date(1606493432000L);
secretKeys = PGPainless.modifyKeyRing(secretKeys).setExpirationDate(fingerprint, date, new UnprotectedKeysProtector()).done();
secretKeys = PGPainless.modifyKeyRing(secretKeys)
.setExpirationDate(date, new UnprotectedKeysProtector()).done();
sInfo = PGPainless.inspectKeyRing(secretKeys);
assertNotNull(sInfo.getExpirationDate());
assertEquals(date.getTime(), sInfo.getExpirationDate().getTime());
// subkey unchanged
assertNull(sInfo.getExpirationDate(subKeyFingerprint));
// We need to wait for one second as OpenPGP signatures have coarse-grained (up to a second)
// accuracy. Creating two signatures within a short amount of time will make the second one
// "invisible"
Thread.sleep(1000);
Thread.sleep(1100);
secretKeys = PGPainless.modifyKeyRing(secretKeys)
.setExpirationDate(null, new UnprotectedKeysProtector()).done();
secretKeys = PGPainless.modifyKeyRing(secretKeys).setExpirationDate(fingerprint, null, new UnprotectedKeysProtector()).done();
sInfo = PGPainless.inspectKeyRing(secretKeys);
assertNull(sInfo.getExpirationDate());
assertNull(sInfo.getExpirationDate(subKeyFingerprint));
}
@Test
public void setExpirationDateAndThenUnsetIt_OnSubkey() throws PGPException, IOException, InterruptedException {
PGPSecretKeyRing secretKeys = TestKeys.getEmilSecretKeyRing();
KeyRingInfo sInfo = PGPainless.inspectKeyRing(secretKeys);
assertNull(sInfo.getExpirationDate(subKeyFingerprint));
assertNull(sInfo.getExpirationDate());
Date date = new Date(1606493432000L);
secretKeys = PGPainless.modifyKeyRing(secretKeys)
.setExpirationDate(subKeyFingerprint, date, new UnprotectedKeysProtector()).done();
sInfo = PGPainless.inspectKeyRing(secretKeys);
assertNotNull(sInfo.getExpirationDate(subKeyFingerprint));
assertEquals(date.getTime(), sInfo.getExpirationDate(subKeyFingerprint).getTime());
assertNull(sInfo.getExpirationDate());
// We need to wait for one second as OpenPGP signatures have coarse-grained (up to a second)
// accuracy. Creating two signatures within a short amount of time will make the second one
// "invisible"
Thread.sleep(1100);
secretKeys = PGPainless.modifyKeyRing(secretKeys)
.setExpirationDate(subKeyFingerprint, null, new UnprotectedKeysProtector()).done();
sInfo = PGPainless.inspectKeyRing(secretKeys);
assertNull(sInfo.getExpirationDate(subKeyFingerprint));
assertNull(sInfo.getExpirationDate());
}
}