Commit 6df84274 authored by Ingo Klöcker's avatar Ingo Klöcker
Browse files

Disable "Revoke User ID" action for last "valid" user ID

gpg does not allow revoking the last "valid" user ID where "valid" means
that the user ID is neither revoked (the user ID, not the key!) nor
expired (again: the user ID, not the key!).

GnuPG-bug-id: 4087
parent c5e2514e
......@@ -630,6 +630,35 @@ void CertificateDetailsWidget::Private::publishCertificate()
namespace
{
bool isSelfSignature(const GpgME::UserID::Signature &signature)
{
return !qstrcmp(signature.parent().parent().keyID(), signature.signerKeyID());
}
bool isRevokedOrExpired(const GpgME::UserID &userId)
{
const auto sigs = userId.signatures();
std::vector<GpgME::UserID::Signature> selfSigs;
std::copy_if(std::begin(sigs), std::end(sigs), std::back_inserter(selfSigs), &isSelfSignature);
std::sort(std::begin(selfSigs), std::end(selfSigs));
// check the most recent signature
const auto sig = !selfSigs.empty() ? selfSigs.back() : GpgME::UserID::Signature{};
return !sig.isNull() && (sig.isRevokation() || sig.isExpired());
}
bool isLastValidUserID(const GpgME::UserID &userId)
{
if (isRevokedOrExpired(userId)) {
return false;
}
const auto userIds = userId.parent().userIDs();
const int numberOfValidUserIds = std::count_if(std::begin(userIds), std::end(userIds),
[](const auto &u) {
return !isRevokedOrExpired(u);
});
return numberOfValidUserIds == 1;
}
bool canCreateCertifications(const GpgME::Key &key)
{
// Note: Key::hasSecret() is also true for offline keys (i.e. keys with a secret key stub that are not stored on a card),
......@@ -643,7 +672,8 @@ bool canRevokeUserID(const GpgME::UserID &userId)
const auto key = userId.parent();
return (!userId.isNull() //
&& key.protocol() == GpgME::OpenPGP
&& canCreateCertifications(key));
&& canCreateCertifications(key)
&& !isLastValidUserID(userId));
}
}
......
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