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Code Issues Releases Wiki Activity

Rework user-id revocation to use subpackets callback API

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This commit is contained in:
Paul Schaub 2021-11-16 15:35:17 +01:00
parent 24aebfaf63
commit 25c95804ce
Signed by: vanitasvitae
GPG key ID: 62BEE9264BF17311
3 changed files with 51 additions and 26 deletions
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59
pgpainless-core/src/main/java/org/pgpainless/key/modification/secretkeyring/SecretKeyRingEditor.java
View file

@ -315,7 +315,33 @@ public class SecretKeyRingEditor implements SecretKeyRingEditorInterface {
@Override
public SecretKeyRingEditorInterface revokeUserId(String userId,
SecretKeyRingProtector secretKeyRingProtector,
RevocationAttributes revocationAttributes)
@Nullable RevocationAttributes revocationAttributes)
throws PGPException {
if (revocationAttributes != null) {
RevocationAttributes.Reason reason = revocationAttributes.getReason();
if (reason != RevocationAttributes.Reason.NO_REASON
&& reason != RevocationAttributes.Reason.USER_ID_NO_LONGER_VALID) {
throw new IllegalArgumentException("Revocation reason must either be NO_REASON or USER_ID_NO_LONGER_VALID");
}
}
RevocationSignatureSubpackets.Callback callback = new RevocationSignatureSubpackets.Callback() {
@Override
public void modifyHashedSubpackets(RevocationSignatureSubpackets hashedSubpackets) {
if (revocationAttributes != null) {
hashedSubpackets.setRevocationReason(false, revocationAttributes);
}
}
};
return revokeUserId(userId, secretKeyRingProtector, callback);
}
@Override
public SecretKeyRingEditorInterface revokeUserId(
String userId,
SecretKeyRingProtector secretKeyRingProtector,
@Nullable RevocationSignatureSubpackets.Callback subpacketCallback)
throws PGPException {
Iterator<String> userIds = secretKeyRing.getPublicKey().getUserIDs();
boolean found = false;
@ -328,38 +354,23 @@ public class SecretKeyRingEditor implements SecretKeyRingEditorInterface {
if (!found) {
throw new NoSuchElementException("No user-id '" + userId + "' found on the key.");
}
return doRevokeUserId(userId, secretKeyRingProtector, revocationAttributes);
return doRevokeUserId(userId, secretKeyRingProtector, subpacketCallback);
}
private SecretKeyRingEditorInterface doRevokeUserId(String userId,
SecretKeyRingProtector protector,
RevocationAttributes revocationAttributes)
@Nullable RevocationSignatureSubpackets.Callback callback)
throws PGPException {
PGPSecretKey primarySecretKey = secretKeyRing.getSecretKey();
PGPPublicKey primaryPublicKey = primarySecretKey.getPublicKey();
PGPPrivateKey privateKey = UnlockSecretKey.unlockSecretKey(primarySecretKey, protector);
RevocationSignatureBuilder signatureBuilder = new RevocationSignatureBuilder(
SignatureType.CERTIFICATION_REVOCATION,
primarySecretKey,
protector);
PGPSignatureSubpacketGenerator subpacketGenerator = new PGPSignatureSubpacketGenerator();
subpacketGenerator.setSignatureCreationTime(false, new Date());
subpacketGenerator.setRevocable(false, false);
subpacketGenerator.setIssuerFingerprint(false, primarySecretKey);
if (revocationAttributes != null) {
RevocationAttributes.Reason reason = revocationAttributes.getReason();
if (reason != RevocationAttributes.Reason.NO_REASON
&& reason != RevocationAttributes.Reason.USER_ID_NO_LONGER_VALID) {
throw new IllegalArgumentException("Revocation reason must either be NO_REASON or USER_ID_NO_LONGER_VALID");
}
subpacketGenerator.setRevocationReason(
false,
revocationAttributes.getReason().code(),
revocationAttributes.getDescription());
}
signatureBuilder.applyCallback(callback);
PGPSignatureGenerator signatureGenerator = SignatureUtils.getSignatureGeneratorFor(primarySecretKey);
signatureGenerator.setHashedSubpackets(subpacketGenerator.generate());
signatureGenerator.init(SignatureType.CERTIFICATION_REVOCATION.getCode(), privateKey);
PGPSignature revocationSignature = signatureGenerator.generateCertification(userId, primaryPublicKey);
PGPSignature revocationSignature = signatureBuilder.build(userId);
primaryPublicKey = PGPPublicKey.addCertification(primaryPublicKey, userId, revocationSignature);
PGPPublicKeyRing publicKeyRing = KeyRingUtils.publicKeyRingFrom(secretKeyRing);

9
pgpainless-core/src/main/java/org/pgpainless/key/modification/secretkeyring/SecretKeyRingEditorInterface.java
View file

@ -190,7 +190,7 @@ public interface SecretKeyRingEditorInterface {
default SecretKeyRingEditorInterface revokeUserId(String userId,
SecretKeyRingProtector secretKeyRingProtector)
throws PGPException {
return revokeUserId(userId, secretKeyRingProtector, null);
return revokeUserId(userId, secretKeyRingProtector, (RevocationAttributes) null);
}
/**
@ -203,9 +203,14 @@ public interface SecretKeyRingEditorInterface {
*/
SecretKeyRingEditorInterface revokeUserId(String userId,
SecretKeyRingProtector secretKeyRingProtector,
RevocationAttributes revocationAttributes)
@Nullable RevocationAttributes revocationAttributes)
throws PGPException;
SecretKeyRingEditorInterface revokeUserId(String userId,
SecretKeyRingProtector secretKeyRingProtector,
@Nullable RevocationSignatureSubpackets.Callback subpacketCallback)
throws PGPException;
/**
* Set the expiration date for the primary key of the key ring.
* If the key is supposed to never expire, then an expiration date of null is expected.

9
pgpainless-core/src/main/java/org/pgpainless/signature/builder/RevocationSignatureBuilder.java
View file

@ -20,6 +20,7 @@ public class RevocationSignatureBuilder extends AbstractSignatureBuilder<Revocat
public RevocationSignatureBuilder(SignatureType signatureType, PGPSecretKey signingKey, SecretKeyRingProtector protector) throws WrongPassphraseException {
super(signatureType, signingKey, protector);
getHashedSubpackets().setRevocable(true, false);
}
@Override
@ -60,4 +61,12 @@ public class RevocationSignatureBuilder extends AbstractSignatureBuilder<Revocat
return signatureGenerator.generateCertification(publicSigningKey, revokeeSubkey);
}
}
public PGPSignature build(String revokeeUserId) throws PGPException {
PGPSignatureGenerator signatureGenerator = buildAndInitSignatureGenerator();
if (signatureType != SignatureType.CERTIFICATION_REVOCATION) {
throw new IllegalArgumentException("Signature type is != CERTIFICATION_REVOCATION.");
}
return signatureGenerator.generateCertification(revokeeUserId, publicSigningKey);
}
}