Make userHasCertificationKey() helper available elsewhere

GnuPG-bug-id: 6102

src/dialogs/certificatedetailswidget.cpp

@@ -212,13 +212,6 @@ void InfoField::onActionChanged()
 
 namespace
 {
-static bool userHasCertificationKey() {
-    const auto secretKeys = KeyCache::instance()->secretKeys();
-    return Kleo::any_of(secretKeys, [](const auto &k) {
-        return (k.protocol() == GpgME::OpenPGP) && canCreateCertifications(k);
-    });
-}
-
 std::vector<GpgME::UserID> selectedUserIDs(const QTreeWidget *treeWidget) {
     if (!treeWidget) {
         return {};

src/utils/keys.cpp

@@ -10,6 +10,9 @@
 
 #include "keys.h"
 
+#include <Libkleo/Algorithm>
+#include <Libkleo/KeyCache>
+
 #include <QByteArray>
 
 // needed for GPGME_VERSION_NUMBER
@@ -77,3 +80,11 @@ bool Kleo::isSecretKeyStoredInKeyRing(const GpgME::Key &key)
 {
     return key.subkey(0).isSecret() && !key.subkey(0).isCardKey();
 }
+
+bool Kleo::userHasCertificationKey()
+{
+    const auto secretKeys = KeyCache::instance()->secretKeys();
+    return Kleo::any_of(secretKeys, [](const auto &k) {
+        return (k.protocol() == GpgME::OpenPGP) && canCreateCertifications(k);
+    });
+}

src/utils/keys.h

@@ -58,4 +58,12 @@ bool canRevokeUserID(const GpgME::UserID &userId);
  */
 bool isSecretKeyStoredInKeyRing(const GpgME::Key &key);
 
+/**
+ * Returns true if any keys suitable for certifying user IDs are available in
+ * the keyring or on a smart card.
+ *
+ * \sa canCreateCertifications
+ */
+bool userHasCertificationKey();
+
 }