diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7b42bbb6b..7b0fb3252 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,156 +1,153 @@
 # SPDX-License-Identifier: CC0-1.0
 # SPDX-FileCopyrightText: none
 cmake_minimum_required(VERSION 3.16 FATAL_ERROR)
 set(PIM_VERSION "5.22.42")
 
 project(libkleo VERSION ${PIM_VERSION})
 
 set(KF5_MIN_VERSION "5.100.0")
 
 if (WIN32)
   set(KF5_WANT_VERSION "5.70.0")
 else ()
   set(KF5_WANT_VERSION ${KF5_MIN_VERSION})
 endif ()
 
 find_package(ECM ${KF5_WANT_VERSION} CONFIG REQUIRED)
 set(CMAKE_MODULE_PATH ${ECM_MODULE_PATH})
 
 include(KDEInstallDirs)
 include(KDECMakeSettings)
 include(KDECompilerSettings NO_POLICY_SCOPE)
 
 include(GenerateExportHeader)
 include(ECMSetupVersion)
 include(ECMGenerateHeaders)
 include(ECMGeneratePriFile)
 
 include(FeatureSummary)
 include(ECMQtDeclareLoggingCategory)
 include(ECMDeprecationSettings)
 include(ECMAddQch)
 include(KDEClangFormat)
 include(KDEGitCommitHooks)
 
 option(BUILD_QCH "Build API documentation in QCH format (for e.g. Qt Assistant, Qt Creator & KDevelop)" OFF)
 add_feature_info(QCH ${BUILD_QCH} "API documentation in QCH format (for e.g. Qt Assistant, Qt Creator & KDevelop)")
 
 set(LIBKLEO_LIB_VERSION ${PIM_VERSION})
 set(QT_REQUIRED_VERSION "5.15.2")
 if (QT_MAJOR_VERSION STREQUAL "6")
     set(QT_REQUIRED_VERSION "6.4.0")
 endif()
 set(KDEPIMTEXTEDIT_VERSION "5.22.40")
-set(GPGME_REQUIRED_VERSION "1.15.0")
+set(GPGME_REQUIRED_VERSION "1.16.0")
 
 find_package(Qt${QT_MAJOR_VERSION} ${QT_REQUIRED_VERSION} CONFIG REQUIRED Widgets)
 if (QT_MAJOR_VERSION STREQUAL "6")
     find_package(Qt6Core5Compat)
 endif()
 find_package(KF5I18n ${KF5_WANT_VERSION} CONFIG REQUIRED)
 find_package(KF5Config ${KF5_WANT_VERSION} CONFIG REQUIRED)
 find_package(KF5WidgetsAddons ${KF5_WANT_VERSION} CONFIG REQUIRED)
 find_package(KF5ConfigWidgets ${KF5_WANT_VERSION} CONFIG REQUIRED)
 find_package(KF5Completion ${KF5_WANT_VERSION} CONFIG REQUIRED)
 find_package(KF5CoreAddons ${KF5_WANT_VERSION} CONFIG REQUIRED)
 find_package(KF5Codecs ${KF5_WANT_VERSION} CONFIG REQUIRED)
 find_package(KF5ItemModels ${KF5_WANT_VERSION} CONFIG REQUIRED)
 find_package(KF5PimTextEdit ${KDEPIMTEXTEDIT_VERSION} CONFIG)
 
 find_package(Gpgmepp ${GPGME_REQUIRED_VERSION} CONFIG REQUIRED)
 set_package_properties(Gpgmepp PROPERTIES DESCRIPTION "GpgME++ Library" URL "https://www.gnupg.org" TYPE REQUIRED PURPOSE "GpgME++ is required for OpenPGP support")
 if (QT_MAJOR_VERSION STREQUAL "6")
     find_package(QGpgmeQt6 ${GPGME_REQUIRED_VERSION} CONFIG REQUIRED)
 else()
     find_package(QGpgme ${GPGME_REQUIRED_VERSION} CONFIG REQUIRED)
 endif()
 message(STATUS "GpgME++ Version ${Gpgmepp_VERSION}")
-if (Gpgmepp_VERSION VERSION_GREATER_EQUAL "1.16.0")
-    set(GPGMEPP_SUPPORTS_TRUST_SIGNATURES 1)
-endif()
 if (QGpgme_VERSION VERSION_GREATER_EQUAL "1.18.1")
     set(QGPGME_LISTALLKEYSJOB_HAS_OPTIONS 1)
 endif()
 
 find_package(Boost 1.34.0)
 set_package_properties(Boost PROPERTIES DESCRIPTION "Boost C++ Libraries" URL "https://www.boost.org" TYPE REQUIRED PURPOSE "Boost is required for building most KDEPIM applications")
 
 
 set_package_properties(KF5PimTextEdit PROPERTIES DESCRIPTION
                        "A textedit with PIM-specific features."
                        URL "https://commits.kde.org/kpimtextedit"
                        TYPE OPTIONAL PURPOSE "Improved audit log viewer.")
 
 ecm_setup_version(PROJECT VARIABLE_PREFIX LIBKLEO
                         VERSION_HEADER "${CMAKE_CURRENT_BINARY_DIR}/libkleo_version.h"
                         PACKAGE_VERSION_FILE "${CMAKE_CURRENT_BINARY_DIR}/KF5LibkleoConfigVersion.cmake"
                         SOVERSION 5
 )
 
 ########### Targets ###########
 ecm_set_disabled_deprecation_versions(QT 5.15.2  KF 5.100.0)
 
 remove_definitions(-DQT_NO_FOREACH)
 add_definitions(-DQT_NO_EMIT)
 ########### CMake Config Files ###########
 set(CMAKECONFIG_INSTALL_DIR "${KDE_INSTALL_CMAKEPACKAGEDIR}/KF5Libkleo")
 
 configure_package_config_file(
   "${CMAKE_CURRENT_SOURCE_DIR}/KF5LibkleoConfig.cmake.in"
   "${CMAKE_CURRENT_BINARY_DIR}/KF5LibkleoConfig.cmake"
   INSTALL_DESTINATION  ${CMAKECONFIG_INSTALL_DIR}
 )
 
 install(FILES
   "${CMAKE_CURRENT_BINARY_DIR}/KF5LibkleoConfig.cmake"
   "${CMAKE_CURRENT_BINARY_DIR}/KF5LibkleoConfigVersion.cmake"
   DESTINATION "${CMAKECONFIG_INSTALL_DIR}"
   COMPONENT Devel
 )
 
 install(EXPORT KF5LibkleoTargets DESTINATION "${CMAKECONFIG_INSTALL_DIR}" FILE KF5LibkleoTargets.cmake NAMESPACE KF5::)
 
 install(FILES
    ${CMAKE_CURRENT_BINARY_DIR}/libkleo_version.h
   DESTINATION ${KDE_INSTALL_INCLUDEDIR_KF}/Libkleo COMPONENT Devel
 )
 
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/config-libkleo.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/config-libkleo.h)
 include_directories(${CMAKE_CURRENT_BINARY_DIR})
 
 option(USE_UNITY_CMAKE_SUPPORT "Use UNITY cmake support (speedup compile time)" OFF)
 
 set(COMPILE_WITH_UNITY_CMAKE_SUPPORT OFF)
 if (USE_UNITY_CMAKE_SUPPORT)
     set(COMPILE_WITH_UNITY_CMAKE_SUPPORT ON)
 endif()
 
 
 add_subdirectory(src)
 if (BUILD_TESTING)
     add_subdirectory(autotests)
     add_subdirectory(tests)
 endif()
 
 ecm_qt_install_logging_categories(
         EXPORT LIBKLEO
         FILE libkleo.categories
         DESTINATION ${KDE_INSTALL_LOGGINGCATEGORIESDIR}
         )
 
 ki18n_install(po)
 if (BUILD_QCH)
     ecm_install_qch_export(
         TARGETS KF5Libkleo_QCH
         FILE KF5LibkleoQchTargets.cmake
         DESTINATION "${CMAKECONFIG_INSTALL_DIR}"
         COMPONENT Devel
     )
     set(PACKAGE_INCLUDE_QCHTARGETS "include(\"\${CMAKE_CURRENT_LIST_DIR}/KF5LibkleoQchTargets.cmake\")")
 endif()
 feature_summary(WHAT ALL FATAL_ON_MISSING_REQUIRED_PACKAGES)
 
 # add clang-format target for all our real source files
 file(GLOB_RECURSE ALL_CLANG_FORMAT_SOURCE_FILES *.cpp *.h *.c)
 kde_clang_format(${ALL_CLANG_FORMAT_SOURCE_FILES})
 kde_configure_git_pre_commit_hook(CHECKS CLANG_FORMAT)
diff --git a/config-libkleo.h.cmake b/config-libkleo.h.cmake
index 976cc3768..b82ded531 100644
--- a/config-libkleo.h.cmake
+++ b/config-libkleo.h.cmake
@@ -1,5 +1,2 @@
-/* Defined if GpgME++ supports trust signatures */
-#cmakedefine GPGMEPP_SUPPORTS_TRUST_SIGNATURES 1
-
 /* Defined if QGpgME::ListAllKeysJob supports setting options */
 #cmakedefine QGPGME_LISTALLKEYSJOB_HAS_OPTIONS 1
diff --git a/src/models/useridlistmodel.cpp b/src/models/useridlistmodel.cpp
index 90157ba9f..79a42e524 100644
--- a/src/models/useridlistmodel.cpp
+++ b/src/models/useridlistmodel.cpp
@@ -1,396 +1,388 @@
 /* -*- mode: c++; c-basic-offset:4 -*-
     models/useridlistmodel.cpp
 
     This file is part of Kleopatra, the KDE keymanager
     SPDX-FileCopyrightText: 2007 Klarälvdalens Datakonsult AB
     SPDX-FileCopyrightText: 2016 Andre Heinecke <aheinecke@gnupg.org>
     SPDX-FileCopyrightText: 2021 g10 Code GmbH
     SPDX-FileContributor: Ingo Klöcker <dev@ingo-kloecker.de>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include <config-libkleo.h>
 
 #include "useridlistmodel.h"
 
 #include "keycache.h"
 
 #include <libkleo/formatting.h>
 
 #include <KLocalizedString>
 
 #include <QDate>
 #include <QIcon>
 #include <QVariant>
 
 #include <gpgme++/key.h>
 
 using namespace GpgME;
 using namespace Kleo;
 
 class UIDModelItem
 {
     // A uid model item can either be a UserID::Signature or a UserID.
     // you can find out which it is if the uid or the signature return
     // null values. (Not null but isNull)
     //
 public:
     explicit UIDModelItem(const UserID::Signature &sig, UIDModelItem *parentItem, bool showRemarks)
         : mParentItem{parentItem}
         , mSig{sig}
     {
         const auto name = Formatting::prettyName(sig);
         const auto email = Formatting::prettyEMail(sig);
         mItemData = {
             Formatting::prettyID(sig.signerKeyID()),
             name,
             email,
             Formatting::creationDateString(sig),
             Formatting::expirationDateString(sig),
             Formatting::validityShort(sig),
             sig.isExportable() ? QStringLiteral("✓") : QString{},
         };
 
         QString lastNotation;
         if (showRemarks && parentItem) {
             for (const auto &notation : sig.notations()) {
                 if (notation.name() && !strcmp(notation.name(), "rem@gnupg.org")) {
                     lastNotation = QString::fromUtf8(notation.value());
                 }
             }
         }
         mItemData.push_back(lastNotation);
 
-#ifdef GPGMEPP_SUPPORTS_TRUST_SIGNATURES
         const auto trustSignatureDomain = Formatting::trustSignatureDomain(sig);
         mItemData.push_back(trustSignatureDomain);
-#endif
         mAccessibleText = {
             Formatting::accessibleHexID(sig.signerKeyID()),
             name.isEmpty() ? i18nc("text for screen readers for an empty name", "no name") : QVariant{},
             email.isEmpty() ? i18nc("text for screen readers for an empty email address", "no email") : QVariant{},
             Formatting::accessibleDate(Formatting::creationDate(sig)),
             Formatting::accessibleExpirationDate(sig),
             {}, // display text is always okay
             sig.isExportable() ? i18nc("yes, is exportable", "yes") : i18nc("no, is not exportable", "no"),
             lastNotation.isEmpty() ? i18nc("accessible text for empty list of tags", "none") : QVariant{},
-#ifdef GPGMEPP_SUPPORTS_TRUST_SIGNATURES
             trustSignatureDomain.isEmpty() ? i18n("not applicable") : QVariant{},
-#endif
         };
         Q_ASSERT(mAccessibleText.size() == mItemData.size());
     }
 
     explicit UIDModelItem(const UserID &uid, UIDModelItem *parentItem)
         : mParentItem{parentItem}
         , mUid{uid}
     {
         mItemData = {Formatting::prettyUserID(uid)};
         // for the empty cells of the user ID rows we announce "User ID"
         mAccessibleText = {
             {}, // use displayed user ID
             i18n("User ID"),
             i18n("User ID"),
             i18n("User ID"),
             i18n("User ID"),
             i18n("User ID"),
             i18n("User ID"),
             i18n("User ID"),
-#ifdef GPGMEPP_SUPPORTS_TRUST_SIGNATURES
             i18n("User ID"),
-#endif
         };
     }
 
     // The root item
     UIDModelItem()
     {
         mItemData = {
             i18n("User ID / Certification Key ID"),
             i18n("Name"),
             i18n("E-Mail"),
             i18n("Valid From"),
             i18n("Valid Until"),
             i18n("Status"),
             i18n("Exportable"),
             i18n("Tags"),
-#ifdef GPGMEPP_SUPPORTS_TRUST_SIGNATURES
             i18n("Trust Signature For"),
-#endif
         };
         // mAccessibleText is explicitly left empty
     }
 
     ~UIDModelItem()
     {
         qDeleteAll(mChildItems);
     }
 
     void appendChild(UIDModelItem *child)
     {
         mChildItems << child;
     }
 
     UIDModelItem *child(int row) const
     {
         return mChildItems.value(row);
     }
 
     const UIDModelItem *constChild(int row) const
     {
         return mChildItems.value(row);
     }
 
     int childCount() const
     {
         return mChildItems.count();
     }
 
     int columnCount() const
     {
         if (childCount()) {
             // We take the value from the first child
             // as we are likely a UID and our children
             // are UID Signatures.
             return constChild(0)->columnCount();
         }
         return mItemData.count();
     }
 
     QVariant data(int column) const
     {
         return mItemData.value(column);
     }
 
     QVariant accessibleText(int column) const
     {
         return mAccessibleText.value(column);
     }
 
     QVariant toolTip(int column) const
     {
         if (!mSig.isNull()) {
             if (column == static_cast<int>(UserIDListModel::Column::Status)) {
                 return i18n("class %1", mSig.certClass());
             } else if (column == static_cast<int>(UserIDListModel::Column::TrustSignatureDomain)) {
                 return Formatting::trustSignature(mSig);
             }
         }
         return mItemData.value(column);
     }
 
     QVariant icon(int column) const
     {
         if (!mSig.isNull() && column == static_cast<int>(UserIDListModel::Column::Status)) {
             return Formatting::validityIcon(mSig);
         }
         return {};
     }
 
     int row() const
     {
         if (mParentItem) {
             return mParentItem->mChildItems.indexOf(const_cast<UIDModelItem *>(this));
         }
         return 0;
     }
 
     UIDModelItem *parentItem() const
     {
         return mParentItem;
     }
 
     UserID::Signature signature() const
     {
         return mSig;
     }
 
     UserID uid() const
     {
         return mUid;
     }
 
 private:
     QList<UIDModelItem *> mChildItems;
     QList<QVariant> mItemData;
     QList<QVariant> mAccessibleText;
     UIDModelItem *mParentItem = nullptr;
     UserID::Signature mSig;
     UserID mUid;
 };
 
 UserIDListModel::UserIDListModel(QObject *p)
     : QAbstractItemModel{p}
 {
 }
 
 UserIDListModel::~UserIDListModel() = default;
 
 Key UserIDListModel::key() const
 {
     return mKey;
 }
 
 void UserIDListModel::setKey(const Key &key)
 {
     beginResetModel();
     mKey = key;
 
     mRootItem.reset(new UIDModelItem);
     for (int i = 0, ids = key.numUserIDs(); i < ids; ++i) {
         UserID uid = key.userID(i);
         auto uidItem = new UIDModelItem(uid, mRootItem.get());
         mRootItem->appendChild(uidItem);
         std::vector<UserID::Signature> sigs = uid.signatures();
         std::sort(sigs.begin(), sigs.end());
         for (const auto &sig : sigs) {
             auto sigItem = new UIDModelItem(sig, uidItem, mRemarksEnabled);
             uidItem->appendChild(sigItem);
         }
     }
 
     endResetModel();
 }
 
 int UserIDListModel::columnCount(const QModelIndex &parent) const
 {
     if (parent.isValid()) {
         return static_cast<UIDModelItem *>(parent.internalPointer())->columnCount();
     }
 
     if (!mRootItem) {
         return 0;
     }
 
     return mRootItem->columnCount();
 }
 
 int UserIDListModel::rowCount(const QModelIndex &parent) const
 {
     if (parent.column() > 0 || !mRootItem) {
         return 0;
     }
 
     const UIDModelItem *const parentItem = !parent.isValid() ? mRootItem.get() : static_cast<UIDModelItem *>(parent.internalPointer());
     return parentItem->childCount();
 }
 
 QModelIndex UserIDListModel::index(int row, int column, const QModelIndex &parent) const
 {
     if (!hasIndex(row, column, parent)) {
         return {};
     }
 
     const UIDModelItem *const parentItem = !parent.isValid() ? mRootItem.get() : static_cast<UIDModelItem *>(parent.internalPointer());
     UIDModelItem *const childItem = parentItem->child(row);
     if (childItem) {
         return createIndex(row, column, childItem);
     } else {
         return QModelIndex();
     }
 }
 
 QModelIndex UserIDListModel::parent(const QModelIndex &index) const
 {
     if (!index.isValid()) {
         return {};
     }
     auto childItem = static_cast<UIDModelItem *>(index.internalPointer());
     UIDModelItem *parentItem = childItem->parentItem();
 
     if (parentItem == mRootItem.get()) {
         return QModelIndex();
     }
 
     return createIndex(parentItem->row(), 0, parentItem);
 }
 
 QVariant UserIDListModel::headerData(int section, Qt::Orientation o, int role) const
 {
     if (o == Qt::Horizontal && mRootItem) {
         if (role == Qt::DisplayRole || role == Qt::EditRole || role == Qt::ToolTipRole) {
             return mRootItem->data(section);
         } else if (role == Qt::AccessibleTextRole) {
             return mRootItem->accessibleText(section);
         }
     }
     return QVariant();
 }
 
 QVariant UserIDListModel::data(const QModelIndex &index, int role) const
 {
     if (!index.isValid()) {
         return QVariant();
     }
 
     auto item = static_cast<UIDModelItem *>(index.internalPointer());
 
     switch (role) {
     case Qt::DisplayRole:
     case Qt::EditRole:
         return item->data(index.column());
     case Qt::AccessibleTextRole:
         return item->accessibleText(index.column());
     case Qt::ToolTipRole:
         return item->toolTip(index.column());
     case Qt::DecorationRole:
         return item->icon(index.column());
     default:;
     }
 
     return {};
 }
 
 UserID UserIDListModel::userID(const QModelIndex &index) const
 {
     if (!index.isValid()) {
         return UserID();
     }
     UIDModelItem *item = static_cast<UIDModelItem *>(index.internalPointer());
     return item->uid();
 }
 
 QVector<UserID> UserIDListModel::userIDs(const QModelIndexList &indexes) const
 {
     QVector<GpgME::UserID> ret;
     for (const QModelIndex &idx : indexes) {
         if (!idx.isValid()) {
             continue;
         }
         auto item = static_cast<UIDModelItem *>(idx.internalPointer());
         if (!item->uid().isNull()) {
             ret << item->uid();
         }
     }
     return ret;
 }
 
 UserID::Signature UserIDListModel::signature(const QModelIndex &index) const
 {
     if (!index.isValid()) {
         return UserID::Signature();
     }
     UIDModelItem *item = static_cast<UIDModelItem *>(index.internalPointer());
     return item->signature();
 }
 
 QVector<UserID::Signature> UserIDListModel::signatures(const QModelIndexList &indexes) const
 {
     QVector<GpgME::UserID::Signature> ret;
     for (const QModelIndex &idx : indexes) {
         if (!idx.isValid()) {
             continue;
         }
         auto item = static_cast<UIDModelItem *>(idx.internalPointer());
         if (!item->signature().isNull()) {
             ret << item->signature();
         }
     }
     return ret;
 }
 
 void UserIDListModel::enableRemarks(bool value)
 {
     mRemarksEnabled = value;
 }
diff --git a/src/utils/formatting.cpp b/src/utils/formatting.cpp
index 49aece2af..1ceef8c3a 100644
--- a/src/utils/formatting.cpp
+++ b/src/utils/formatting.cpp
@@ -1,1328 +1,1320 @@
 /* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil; -*-
     utils/formatting.cpp
 
     This file is part of Kleopatra, the KDE keymanager
     SPDX-FileCopyrightText: 2007 Klarälvdalens Datakonsult AB
     SPDX-FileCopyrightText: 2021, 2022 g10 Code GmbH
     SPDX-FileContributor: Ingo Klöcker <dev@ingo-kloecker.de>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include <config-libkleo.h>
 
 #include "formatting.h"
 
 #include "compliance.h"
 #include "cryptoconfig.h"
 #include "gnupg.h"
 #include "keyhelpers.h"
 
 #include <libkleo/dn.h>
 #include <libkleo/keycache.h>
 #include <libkleo/keygroup.h>
 
 #include <KEmailAddress>
 #include <KLocalizedString>
 
 #include <QGpgME/CryptoConfig>
 #include <QGpgME/Protocol>
 
 #include <QDateTime>
 #include <QIcon>
 #include <QLocale>
 #include <QRegularExpression>
 #include <QString>
 #include <QTextDocument> // for Qt::escape
 
 #include <gpgme++/importresult.h>
 #include <gpgme++/key.h>
 
 using namespace GpgME;
 using namespace Kleo;
 
 //
 // Name
 //
 
 QString Formatting::prettyName(int proto, const char *id, const char *name_, const char *comment_)
 {
     if (proto == GpgME::OpenPGP) {
         const QString name = QString::fromUtf8(name_);
         if (name.isEmpty()) {
             return QString();
         }
         const QString comment = QString::fromUtf8(comment_);
         if (comment.isEmpty()) {
             return name;
         }
         return QStringLiteral("%1 (%2)").arg(name, comment);
     }
 
     if (proto == GpgME::CMS) {
         const DN subject(id);
         const QString cn = subject[QStringLiteral("CN")].trimmed();
         if (cn.isEmpty()) {
             return subject.prettyDN();
         }
         return cn;
     }
 
     return QString();
 }
 
 QString Formatting::prettyNameAndEMail(int proto, const char *id, const char *name_, const char *email_, const char *comment_)
 {
     return prettyNameAndEMail(proto, QString::fromUtf8(id), QString::fromUtf8(name_), prettyEMail(email_, id), QString::fromUtf8(comment_));
 }
 
 QString Formatting::prettyNameAndEMail(int proto, const QString &id, const QString &name, const QString &email, const QString &comment)
 {
     if (proto == GpgME::OpenPGP) {
         if (name.isEmpty()) {
             if (email.isEmpty()) {
                 return QString();
             } else if (comment.isEmpty()) {
                 return QStringLiteral("<%1>").arg(email);
             } else {
                 return QStringLiteral("(%2) <%1>").arg(email, comment);
             }
         }
         if (email.isEmpty()) {
             if (comment.isEmpty()) {
                 return name;
             } else {
                 return QStringLiteral("%1 (%2)").arg(name, comment);
             }
         }
         if (comment.isEmpty()) {
             return QStringLiteral("%1 <%2>").arg(name, email);
         } else {
             return QStringLiteral("%1 (%3) <%2>").arg(name, email, comment);
         }
     }
 
     if (proto == GpgME::CMS) {
         const DN subject(id);
         const QString cn = subject[QStringLiteral("CN")].trimmed();
         if (cn.isEmpty()) {
             return subject.prettyDN();
         }
         return cn;
     }
     return QString();
 }
 
 QString Formatting::prettyUserID(const UserID &uid)
 {
     if (uid.parent().protocol() == GpgME::OpenPGP) {
         return prettyNameAndEMail(uid);
     }
     const QByteArray id = QByteArray(uid.id()).trimmed();
     if (id.startsWith('<')) {
         return prettyEMail(uid.email(), uid.id());
     }
     if (id.startsWith('(')) {
         // ### parse uri/dns:
         return QString::fromUtf8(uid.id());
     } else {
         return DN(uid.id()).prettyDN();
     }
 }
 
 QString Formatting::prettyKeyID(const char *id)
 {
     if (!id) {
         return QString();
     }
     return QLatin1String("0x") + QString::fromLatin1(id).toUpper();
 }
 
 QString Formatting::prettyNameAndEMail(const UserID &uid)
 {
     return prettyNameAndEMail(uid.parent().protocol(), uid.id(), uid.name(), uid.email(), uid.comment());
 }
 
 QString Formatting::prettyNameAndEMail(const Key &key)
 {
     return prettyNameAndEMail(key.userID(0));
 }
 
 QString Formatting::prettyName(const Key &key)
 {
     return prettyName(key.userID(0));
 }
 
 QString Formatting::prettyName(const UserID &uid)
 {
     return prettyName(uid.parent().protocol(), uid.id(), uid.name(), uid.comment());
 }
 
 QString Formatting::prettyName(const UserID::Signature &sig)
 {
     return prettyName(GpgME::OpenPGP, sig.signerUserID(), sig.signerName(), sig.signerComment());
 }
 
 //
 // EMail
 //
 
 QString Formatting::prettyEMail(const Key &key)
 {
     for (unsigned int i = 0, end = key.numUserIDs(); i < end; ++i) {
         const QString email = prettyEMail(key.userID(i));
         if (!email.isEmpty()) {
             return email;
         }
     }
     return QString();
 }
 
 QString Formatting::prettyEMail(const UserID &uid)
 {
     return prettyEMail(uid.email(), uid.id());
 }
 
 QString Formatting::prettyEMail(const UserID::Signature &sig)
 {
     return prettyEMail(sig.signerEmail(), sig.signerUserID());
 }
 
 QString Formatting::prettyEMail(const char *email_, const char *id)
 {
     QString email;
     QString name;
     QString comment;
     if (email_ && KEmailAddress::splitAddress(QString::fromUtf8(email_), name, email, comment) == KEmailAddress::AddressOk) {
         return email;
     } else {
         return DN(id)[QStringLiteral("EMAIL")].trimmed();
     }
 }
 
 //
 // Tooltip
 //
 
 namespace
 {
 
 static QString protect_whitespace(QString s)
 {
     static const QLatin1Char SP(' ');
     static const QLatin1Char NBSP('\xA0');
     return s.replace(SP, NBSP);
 }
 
 template<typename T_arg>
 QString format_row(const QString &field, const T_arg &arg)
 {
     return QStringLiteral("<tr><th>%1:</th><td>%2</td></tr>").arg(protect_whitespace(field), arg);
 }
 QString format_row(const QString &field, const QString &arg)
 {
     return QStringLiteral("<tr><th>%1:</th><td>%2</td></tr>").arg(protect_whitespace(field), arg.toHtmlEscaped());
 }
 QString format_row(const QString &field, const char *arg)
 {
     return format_row(field, QString::fromUtf8(arg));
 }
 
 QString format_keytype(const Key &key)
 {
     const Subkey subkey = key.subkey(0);
     if (key.hasSecret()) {
         return i18n("%1-bit %2 (secret key available)", subkey.length(), QLatin1String(subkey.publicKeyAlgorithmAsString()));
     } else {
         return i18n("%1-bit %2", subkey.length(), QLatin1String(subkey.publicKeyAlgorithmAsString()));
     }
 }
 
 QString format_subkeytype(const Subkey &subkey)
 {
     const auto algo = subkey.publicKeyAlgorithm();
 
     if (algo == Subkey::AlgoECC || algo == Subkey::AlgoECDSA || algo == Subkey::AlgoECDH || algo == Subkey::AlgoEDDSA) {
         return QString::fromStdString(subkey.algoName());
     }
     return i18n("%1-bit %2", subkey.length(), QLatin1String(subkey.publicKeyAlgorithmAsString()));
 }
 
 QString format_keyusage(const Key &key)
 {
     QStringList capabilities;
     if (key.canReallySign()) {
         if (key.isQualified()) {
             capabilities.push_back(i18n("Signing (Qualified)"));
         } else {
             capabilities.push_back(i18n("Signing"));
         }
     }
     if (key.canEncrypt()) {
         capabilities.push_back(i18n("Encryption"));
     }
     if (key.canCertify()) {
         capabilities.push_back(i18n("Certifying User-IDs"));
     }
     if (key.canAuthenticate()) {
         capabilities.push_back(i18n("SSH Authentication"));
     }
     return capabilities.join(QLatin1String(", "));
 }
 
 QString format_subkeyusage(const Subkey &subkey)
 {
     QStringList capabilities;
     if (subkey.canSign()) {
         if (subkey.isQualified()) {
             capabilities.push_back(i18n("Signing (Qualified)"));
         } else {
             capabilities.push_back(i18n("Signing"));
         }
     }
     if (subkey.canEncrypt()) {
         capabilities.push_back(i18n("Encryption"));
     }
     if (subkey.canCertify()) {
         capabilities.push_back(i18n("Certifying User-IDs"));
     }
     if (subkey.canAuthenticate()) {
         capabilities.push_back(i18n("SSH Authentication"));
     }
     return capabilities.join(QLatin1String(", "));
 }
 
 static QString time_t2string(time_t t)
 {
     const QDateTime dt = QDateTime::fromSecsSinceEpoch(quint32(t));
     return QLocale().toString(dt, QLocale::ShortFormat);
 }
 
 static QString make_red(const QString &txt)
 {
     return QLatin1String("<font color=\"red\">") + txt.toHtmlEscaped() + QLatin1String("</font>");
 }
 
 }
 
 QString Formatting::toolTip(const Key &key, int flags)
 {
     if (flags == 0 || (key.protocol() != GpgME::CMS && key.protocol() != GpgME::OpenPGP)) {
         return QString();
     }
 
     const Subkey subkey = key.subkey(0);
 
     QString result;
     if (flags & Validity) {
         if (key.protocol() == GpgME::OpenPGP || (key.keyListMode() & Validate)) {
             if (key.isRevoked()) {
                 result = make_red(i18n("Revoked"));
             } else if (key.isExpired()) {
                 result = make_red(i18n("Expired"));
             } else if (key.isDisabled()) {
                 result = i18n("Disabled");
             } else if (key.keyListMode() & GpgME::Validate) {
                 unsigned int fullyTrusted = 0;
                 for (const auto &uid : key.userIDs()) {
                     if (uid.validity() >= UserID::Validity::Full) {
                         fullyTrusted++;
                     }
                 }
                 if (fullyTrusted == key.numUserIDs()) {
                     result = i18n("All User-IDs are certified.");
                     const auto compliance = complianceStringForKey(key);
                     if (!compliance.isEmpty()) {
                         result += QStringLiteral("<br>") + compliance;
                     }
                 } else {
                     result = i18np("One User-ID is not certified.", "%1 User-IDs are not certified.", key.numUserIDs() - fullyTrusted);
                 }
             } else {
                 result = i18n("The validity cannot be checked at the moment.");
             }
         } else {
             result = i18n("The validity cannot be checked at the moment.");
         }
     }
     if (flags == Validity) {
         return result;
     }
 
     result += QLatin1String("<table border=\"0\">");
     if (key.protocol() == GpgME::CMS) {
         if (flags & SerialNumber) {
             result += format_row(i18n("Serial number"), key.issuerSerial());
         }
         if (flags & Issuer) {
             result += format_row(i18n("Issuer"), key.issuerName());
         }
     }
     if (flags & UserIDs) {
         const std::vector<UserID> uids = key.userIDs();
         if (!uids.empty()) {
             result += format_row(key.protocol() == GpgME::CMS ? i18n("Subject") : i18n("User-ID"), prettyUserID(uids.front()));
         }
         if (uids.size() > 1) {
             for (auto it = uids.begin() + 1, end = uids.end(); it != end; ++it) {
                 if (!it->isRevoked() && !it->isInvalid()) {
                     result += format_row(i18n("a.k.a."), prettyUserID(*it));
                 }
             }
         }
     }
     if (flags & ExpiryDates) {
         result += format_row(i18n("Valid from"), time_t2string(subkey.creationTime()));
 
         if (!subkey.neverExpires()) {
             result += format_row(i18n("Valid until"), time_t2string(subkey.expirationTime()));
         }
     }
     if (flags & CertificateType) {
         result += format_row(i18n("Type"), format_keytype(key));
     }
     if (flags & CertificateUsage) {
         result += format_row(i18n("Usage"), format_keyusage(key));
     }
     if (flags & KeyID) {
         result += format_row(i18n("Key-ID"), QString::fromLatin1(key.shortKeyID()));
     }
     if (flags & Fingerprint) {
         result += format_row(i18n("Fingerprint"), key.primaryFingerprint());
     }
     if (flags & OwnerTrust) {
         if (key.protocol() == GpgME::OpenPGP) {
             result += format_row(i18n("Certification trust"), ownerTrustShort(key));
         } else if (key.isRoot()) {
             result += format_row(i18n("Trusted issuer?"), key.userID(0).validity() == UserID::Ultimate ? i18n("Yes") : i18n("No"));
         }
     }
 
     if (flags & StorageLocation) {
         if (const char *card = subkey.cardSerialNumber()) {
             result += format_row(i18n("Stored"), i18nc("stored...", "on SmartCard with serial no. %1", QString::fromUtf8(card)));
         } else {
             result += format_row(i18n("Stored"), i18nc("stored...", "on this computer"));
         }
     }
     if (flags & Subkeys) {
         for (const auto &sub : key.subkeys()) {
             result += QLatin1String("<hr/>");
             result += format_row(i18n("Subkey"), sub.fingerprint());
             if (sub.isRevoked()) {
                 result += format_row(i18n("Status"), i18n("Revoked"));
             } else if (sub.isExpired()) {
                 result += format_row(i18n("Status"), i18n("Expired"));
             }
             if (flags & ExpiryDates) {
                 result += format_row(i18n("Valid from"), time_t2string(sub.creationTime()));
 
                 if (!sub.neverExpires()) {
                     result += format_row(i18n("Valid until"), time_t2string(sub.expirationTime()));
                 }
             }
 
             if (flags & CertificateType) {
                 result += format_row(i18n("Type"), format_subkeytype(sub));
             }
             if (flags & CertificateUsage) {
                 result += format_row(i18n("Usage"), format_subkeyusage(sub));
             }
             if (flags & StorageLocation) {
                 if (const char *card = sub.cardSerialNumber()) {
                     result += format_row(i18n("Stored"), i18nc("stored...", "on SmartCard with serial no. %1", QString::fromUtf8(card)));
                 } else {
                     result += format_row(i18n("Stored"), i18nc("stored...", "on this computer"));
                 }
             }
         }
     }
     result += QLatin1String("</table>");
 
     return result;
 }
 
 namespace
 {
 template<typename Container>
 QString getValidityStatement(const Container &keys)
 {
     const bool allKeysAreOpenPGP = std::all_of(keys.cbegin(), keys.cend(), [](const Key &key) {
         return key.protocol() == GpgME::OpenPGP;
     });
     const bool allKeysAreValidated = std::all_of(keys.cbegin(), keys.cend(), [](const Key &key) {
         return key.keyListMode() & Validate;
     });
     if (allKeysAreOpenPGP || allKeysAreValidated) {
         const bool someKeysAreBad = std::any_of(keys.cbegin(), keys.cend(), std::mem_fn(&Key::isBad));
         if (someKeysAreBad) {
             return i18n("Some keys are revoked, expired, disabled, or invalid.");
         } else {
             const bool allKeysAreFullyValid = std::all_of(keys.cbegin(), keys.cend(), &Formatting::uidsHaveFullValidity);
             if (allKeysAreFullyValid) {
                 return i18n("All keys are certified.");
             } else {
                 return i18n("Some keys are not certified.");
             }
         }
     }
     return i18n("The validity of the keys cannot be checked at the moment.");
 }
 }
 
 QString Formatting::toolTip(const KeyGroup &group, int flags)
 {
     static const unsigned int maxNumKeysForTooltip = 20;
 
     if (group.isNull()) {
         return QString();
     }
 
     const KeyGroup::Keys &keys = group.keys();
     if (keys.size() == 0) {
         return i18nc("@info:tooltip", "This group does not contain any keys.");
     }
 
     const QString validity = (flags & Validity) ? getValidityStatement(keys) : QString();
     if (flags == Validity) {
         return validity;
     }
 
     // list either up to maxNumKeysForTooltip keys or (maxNumKeysForTooltip-1) keys followed by "and n more keys"
     const unsigned int numKeysForTooltip = keys.size() > maxNumKeysForTooltip ? maxNumKeysForTooltip - 1 : keys.size();
 
     QStringList result;
     result.reserve(3 + 2 + numKeysForTooltip + 2);
     if (!validity.isEmpty()) {
         result.push_back(QStringLiteral("<p>"));
         result.push_back(validity.toHtmlEscaped());
         result.push_back(QStringLiteral("</p>"));
     }
 
     result.push_back(QStringLiteral("<p>"));
     result.push_back(i18n("Keys:"));
     {
         auto it = keys.cbegin();
         for (unsigned int i = 0; i < numKeysForTooltip; ++i, ++it) {
             result.push_back(QLatin1String("<br>") + Formatting::summaryLine(*it).toHtmlEscaped());
         }
     }
     if (keys.size() > numKeysForTooltip) {
         result.push_back(QLatin1String("<br>") + i18ncp("this follows a list of keys", "and 1 more key", "and %1 more keys", keys.size() - numKeysForTooltip));
     }
     result.push_back(QStringLiteral("</p>"));
 
     return result.join(QLatin1Char('\n'));
 }
 
 //
 // Creation and Expiration
 //
 
 namespace
 {
 static QDate time_t2date(time_t t)
 {
     if (!t) {
         return {};
     }
     const QDateTime dt = QDateTime::fromSecsSinceEpoch(quint32(t));
     return dt.date();
 }
 static QString accessible_date_format()
 {
     return i18nc(
         "date format suitable for screen readers; "
         "d: day as a number without a leading zero, "
         "MMMM: localized month name, "
         "yyyy: year as a four digit number",
         "MMMM d, yyyy");
 }
 
 template<typename T>
 QString expiration_date_string(const T &tee, const QString &noExpiration)
 {
     return tee.neverExpires() ? noExpiration : Formatting::dateString(time_t2date(tee.expirationTime()));
 }
 template<typename T>
 QDate creation_date(const T &tee)
 {
     return time_t2date(tee.creationTime());
 }
 template<typename T>
 QDate expiration_date(const T &tee)
 {
     return time_t2date(tee.expirationTime());
 }
 }
 
 QString Formatting::dateString(time_t t)
 {
     return dateString(time_t2date(t));
 }
 
 QString Formatting::dateString(const QDate &date)
 {
     return QLocale().toString(date, QLocale::ShortFormat);
 }
 
 QString Formatting::accessibleDate(time_t t)
 {
     return accessibleDate(time_t2date(t));
 }
 
 QString Formatting::accessibleDate(const QDate &date)
 {
     return QLocale().toString(date, accessible_date_format());
 }
 
 QString Formatting::expirationDateString(const Key &key, const QString &noExpiration)
 {
     // if key is remote but has a non-zero expiration date (e.g. a key looked up via WKD),
     // then we assume that the date is valid; if the date is zero for a remote key, then
     // we don't know if it's unknown or unlimited
     return isRemoteKey(key) && (key.subkey(0).expirationTime() == 0) //
         ? i18nc("@info the expiration date of the key is unknown", "unknown")
         : expiration_date_string(key.subkey(0), noExpiration);
 }
 
 QString Formatting::expirationDateString(const Subkey &subkey, const QString &noExpiration)
 {
     return expiration_date_string(subkey, noExpiration);
 }
 
 QString Formatting::expirationDateString(const UserID::Signature &sig, const QString &noExpiration)
 {
     return expiration_date_string(sig, noExpiration);
 }
 
 QDate Formatting::expirationDate(const Key &key)
 {
     return expiration_date(key.subkey(0));
 }
 
 QDate Formatting::expirationDate(const Subkey &subkey)
 {
     return expiration_date(subkey);
 }
 
 QDate Formatting::expirationDate(const UserID::Signature &sig)
 {
     return expiration_date(sig);
 }
 
 QString Formatting::accessibleExpirationDate(const Key &key, const QString &noExpiration)
 {
     // if key is remote but has a non-zero expiration date (e.g. a key looked up via WKD),
     // then we assume that the date is valid; if the date is zero for a remote key, then
     // we don't know if it's unknown or unlimited
     return isRemoteKey(key) && (key.subkey(0).expirationTime() == 0) //
         ? i18nc("@info the expiration date of the key is unknown", "unknown")
         : accessibleExpirationDate(key.subkey(0), noExpiration);
 }
 
 QString Formatting::accessibleExpirationDate(const Subkey &subkey, const QString &noExpiration)
 {
     if (subkey.neverExpires()) {
         return noExpiration.isEmpty() ? i18n("unlimited") : noExpiration;
     } else {
         return accessibleDate(expirationDate(subkey));
     }
 }
 
 QString Formatting::accessibleExpirationDate(const UserID::Signature &sig, const QString &noExpiration)
 {
     if (sig.neverExpires()) {
         return noExpiration.isEmpty() ? i18n("unlimited") : noExpiration;
     } else {
         return accessibleDate(expirationDate(sig));
     }
 }
 
 QString Formatting::creationDateString(const Key &key)
 {
     return dateString(creation_date(key.subkey(0)));
 }
 
 QString Formatting::creationDateString(const Subkey &subkey)
 {
     return dateString(creation_date(subkey));
 }
 
 QString Formatting::creationDateString(const UserID::Signature &sig)
 {
     return dateString(creation_date(sig));
 }
 
 QDate Formatting::creationDate(const Key &key)
 {
     return creation_date(key.subkey(0));
 }
 
 QDate Formatting::creationDate(const Subkey &subkey)
 {
     return creation_date(subkey);
 }
 
 QDate Formatting::creationDate(const UserID::Signature &sig)
 {
     return creation_date(sig);
 }
 
 QString Formatting::accessibleCreationDate(const Key &key)
 {
     return accessibleDate(creationDate(key));
 }
 
 QString Formatting::accessibleCreationDate(const Subkey &subkey)
 {
     return accessibleDate(creationDate(subkey));
 }
 
 //
 // Types
 //
 
 QString Formatting::displayName(GpgME::Protocol p)
 {
     if (p == GpgME::CMS) {
         return i18nc("X.509/CMS encryption standard", "S/MIME");
     }
     if (p == GpgME::OpenPGP) {
         return i18n("OpenPGP");
     }
     return i18nc("Unknown encryption protocol", "Unknown");
 }
 
 QString Formatting::type(const Key &key)
 {
     return displayName(key.protocol());
 }
 
 QString Formatting::type(const Subkey &subkey)
 {
     return QString::fromUtf8(subkey.publicKeyAlgorithmAsString());
 }
 
 QString Formatting::type(const KeyGroup &group)
 {
     Q_UNUSED(group)
     return i18nc("a group of keys/certificates", "Group");
 }
 
 //
 // Status / Validity
 //
 
 QString Formatting::ownerTrustShort(const Key &key)
 {
     return ownerTrustShort(key.ownerTrust());
 }
 
 QString Formatting::ownerTrustShort(Key::OwnerTrust trust)
 {
     switch (trust) {
     case Key::Unknown:
         return i18nc("unknown trust level", "unknown");
     case Key::Never:
         return i18n("untrusted");
     case Key::Marginal:
         return i18nc("marginal trust", "marginal");
     case Key::Full:
         return i18nc("full trust", "full");
     case Key::Ultimate:
         return i18nc("ultimate trust", "ultimate");
     case Key::Undefined:
         return i18nc("undefined trust", "undefined");
     default:
         Q_ASSERT(!"unexpected owner trust value");
         break;
     }
     return QString();
 }
 
 QString Formatting::validityShort(const Subkey &subkey)
 {
     if (subkey.isRevoked()) {
         return i18n("revoked");
     }
     if (subkey.isExpired()) {
         return i18n("expired");
     }
     if (subkey.isDisabled()) {
         return i18n("disabled");
     }
     if (subkey.isInvalid()) {
         return i18n("invalid");
     }
     return i18nc("as in good/valid signature", "good");
 }
 
 QString Formatting::validityShort(const UserID &uid)
 {
     if (uid.isRevoked()) {
         return i18n("revoked");
     }
     if (uid.isInvalid()) {
         return i18n("invalid");
     }
     switch (uid.validity()) {
     case UserID::Unknown:
         return i18nc("unknown trust level", "unknown");
     case UserID::Undefined:
         return i18nc("undefined trust", "undefined");
     case UserID::Never:
         return i18n("untrusted");
     case UserID::Marginal:
         return i18nc("marginal trust", "marginal");
     case UserID::Full:
         return i18nc("full trust", "full");
     case UserID::Ultimate:
         return i18nc("ultimate trust", "ultimate");
     }
     return QString();
 }
 
 QString Formatting::validityShort(const UserID::Signature &sig)
 {
     switch (sig.status()) {
     case UserID::Signature::NoError:
         if (!sig.isInvalid()) {
             /* See RFC 4880 Section 5.2.1 */
             switch (sig.certClass()) {
             case 0x10: /* Generic */
             case 0x11: /* Persona */
             case 0x12: /* Casual */
             case 0x13: /* Positive */
                 return i18n("valid");
             case 0x30:
                 return i18n("revoked");
             default:
                 return i18n("class %1", sig.certClass());
             }
         }
         Q_FALLTHROUGH();
         // fall through:
     case UserID::Signature::GeneralError:
         return i18n("invalid");
     case UserID::Signature::SigExpired:
         return i18n("expired");
     case UserID::Signature::KeyExpired:
         return i18n("certificate expired");
     case UserID::Signature::BadSignature:
         return i18nc("fake/invalid signature", "bad");
     case UserID::Signature::NoPublicKey: {
         /* GnuPG returns the same error for no public key as for expired
          * or revoked certificates. */
         const auto key = KeyCache::instance()->findByKeyIDOrFingerprint(sig.signerKeyID());
         if (key.isNull()) {
             return i18n("no public key");
         } else if (key.isExpired()) {
             return i18n("key expired");
         } else if (key.isRevoked()) {
             return i18n("key revoked");
         } else if (key.isDisabled()) {
             return i18n("key disabled");
         }
         /* can't happen */
         return QStringLiteral("unknown");
     }
     }
     return QString();
 }
 
 QIcon Formatting::validityIcon(const UserID::Signature &sig)
 {
     switch (sig.status()) {
     case UserID::Signature::NoError:
         if (!sig.isInvalid()) {
             /* See RFC 4880 Section 5.2.1 */
             switch (sig.certClass()) {
             case 0x10: /* Generic */
             case 0x11: /* Persona */
             case 0x12: /* Casual */
             case 0x13: /* Positive */
                 return QIcon::fromTheme(QStringLiteral("emblem-success"));
             case 0x30:
                 return QIcon::fromTheme(QStringLiteral("emblem-error"));
             default:
                 return QIcon();
             }
         }
         Q_FALLTHROUGH();
         // fall through:
     case UserID::Signature::BadSignature:
     case UserID::Signature::GeneralError:
         return QIcon::fromTheme(QStringLiteral("emblem-error"));
     case UserID::Signature::SigExpired:
     case UserID::Signature::KeyExpired:
         return QIcon::fromTheme(QStringLiteral("emblem-information"));
     case UserID::Signature::NoPublicKey:
         return QIcon::fromTheme(QStringLiteral("emblem-question"));
     }
     return QIcon();
 }
 
 QString Formatting::formatKeyLink(const Key &key)
 {
     if (key.isNull()) {
         return QString();
     }
     return QStringLiteral("<a href=\"key:%1\">%2</a>").arg(QLatin1String(key.primaryFingerprint()), Formatting::prettyName(key));
 }
 
 QString Formatting::formatForComboBox(const GpgME::Key &key)
 {
     const QString name = prettyName(key);
     QString mail = prettyEMail(key);
     if (!mail.isEmpty()) {
         mail = QLatin1Char('<') + mail + QLatin1Char('>');
     }
     return i18nc("name, email, key id", "%1 %2 (%3)", name, mail, QLatin1String(key.shortKeyID())).simplified();
 }
 
 namespace
 {
 
 static QString keyToString(const Key &key)
 {
     Q_ASSERT(!key.isNull());
 
     const QString email = Formatting::prettyEMail(key);
     const QString name = Formatting::prettyName(key);
 
     if (name.isEmpty()) {
         return email;
     } else if (email.isEmpty()) {
         return name;
     } else {
         return QStringLiteral("%1 <%2>").arg(name, email);
     }
 }
 
 }
 
 const char *Formatting::summaryToString(const Signature::Summary summary)
 {
     if (summary & Signature::Red) {
         return "RED";
     }
     if (summary & Signature::Green) {
         return "GREEN";
     }
     return "YELLOW";
 }
 
 QString Formatting::signatureToString(const Signature &sig, const Key &key)
 {
     if (sig.isNull()) {
         return QString();
     }
 
     const bool red = (sig.summary() & Signature::Red);
     const bool valid = (sig.summary() & Signature::Valid);
 
     if (red) {
         if (key.isNull()) {
             if (const char *fpr = sig.fingerprint()) {
                 return i18n("Bad signature by unknown certificate %1: %2", QString::fromLatin1(fpr), QString::fromLocal8Bit(sig.status().asString()));
             } else {
                 return i18n("Bad signature by an unknown certificate: %1", QString::fromLocal8Bit(sig.status().asString()));
             }
         } else {
             return i18n("Bad signature by %1: %2", keyToString(key), QString::fromLocal8Bit(sig.status().asString()));
         }
 
     } else if (valid) {
         if (key.isNull()) {
             if (const char *fpr = sig.fingerprint()) {
                 return i18n("Good signature by unknown certificate %1.", QString::fromLatin1(fpr));
             } else {
                 return i18n("Good signature by an unknown certificate.");
             }
         } else {
             return i18n("Good signature by %1.", keyToString(key));
         }
 
     } else if (key.isNull()) {
         if (const char *fpr = sig.fingerprint()) {
             return i18n("Invalid signature by unknown certificate %1: %2", QString::fromLatin1(fpr), QString::fromLocal8Bit(sig.status().asString()));
         } else {
             return i18n("Invalid signature by an unknown certificate: %1", QString::fromLocal8Bit(sig.status().asString()));
         }
     } else {
         return i18n("Invalid signature by %1: %2", keyToString(key), QString::fromLocal8Bit(sig.status().asString()));
     }
 }
 
 //
 // ImportResult
 //
 
 QString Formatting::importMetaData(const Import &import, const QStringList &ids)
 {
     const QString result = importMetaData(import);
     if (result.isEmpty()) {
         return QString();
     } else {
         return result + QLatin1Char('\n') + i18n("This certificate was imported from the following sources:") + QLatin1Char('\n') + ids.join(QLatin1Char('\n'));
     }
 }
 
 QString Formatting::importMetaData(const Import &import)
 {
     if (import.isNull()) {
         return QString();
     }
 
     if (import.error().isCanceled()) {
         return i18n("The import of this certificate was canceled.");
     }
     if (import.error()) {
         return i18n("An error occurred importing this certificate: %1", QString::fromLocal8Bit(import.error().asString()));
     }
 
     const unsigned int status = import.status();
     if (status & Import::NewKey) {
         return (status & Import::ContainedSecretKey) ? i18n("This certificate was new to your keystore. The secret key is available.")
                                                      : i18n("This certificate is new to your keystore.");
     }
 
     QStringList results;
     if (status & Import::NewUserIDs) {
         results.push_back(i18n("New user-ids were added to this certificate by the import."));
     }
     if (status & Import::NewSignatures) {
         results.push_back(i18n("New signatures were added to this certificate by the import."));
     }
     if (status & Import::NewSubkeys) {
         results.push_back(i18n("New subkeys were added to this certificate by the import."));
     }
 
     return results.empty() ? i18n("The import contained no new data for this certificate. It is unchanged.") : results.join(QLatin1Char('\n'));
 }
 
 //
 // Overview in CertificateDetailsDialog
 //
 
 QString Formatting::formatOverview(const Key &key)
 {
     return toolTip(key, AllOptions);
 }
 
 QString Formatting::usageString(const Subkey &sub)
 {
     QStringList usageStrings;
     if (sub.canCertify()) {
         usageStrings << i18n("Certify");
     }
     if (sub.canSign()) {
         usageStrings << i18n("Sign");
     }
     if (sub.canEncrypt()) {
         usageStrings << i18n("Encrypt");
     }
     if (sub.canAuthenticate()) {
         usageStrings << i18n("Authenticate");
     }
     return usageStrings.join(QLatin1String(", "));
 }
 
 QString Formatting::summaryLine(const Key &key)
 {
     return keyToString(key) + QLatin1Char(' ')
         + i18nc("(validity, protocol, creation date)",
                 "(%1, %2, created: %3)",
                 Formatting::complianceStringShort(key),
                 displayName(key.protocol()),
                 Formatting::creationDateString(key));
 }
 
 QString Formatting::summaryLine(const KeyGroup &group)
 {
     switch (group.source()) {
     case KeyGroup::ApplicationConfig:
     case KeyGroup::GnuPGConfig:
         return i18ncp("name of group of keys (n key(s), validity)",
                       "%2 (1 key, %3)",
                       "%2 (%1 keys, %3)",
                       group.keys().size(),
                       group.name(),
                       Formatting::complianceStringShort(group));
     case KeyGroup::Tags:
         return i18ncp("name of group of keys (n key(s), validity, tag)",
                       "%2 (1 key, %3, tag)",
                       "%2 (%1 keys, %3, tag)",
                       group.keys().size(),
                       group.name(),
                       Formatting::complianceStringShort(group));
     default:
         return i18ncp("name of group of keys (n key(s), validity, group ...)",
                       "%2 (1 key, %3, unknown origin)",
                       "%2 (%1 keys, %3, unknown origin)",
                       group.keys().size(),
                       group.name(),
                       Formatting::complianceStringShort(group));
     }
 }
 
 namespace
 {
 QIcon iconForValidity(UserID::Validity validity)
 {
     switch (validity) {
     case UserID::Ultimate:
     case UserID::Full:
     case UserID::Marginal:
         return QIcon::fromTheme(QStringLiteral("emblem-success"));
     case UserID::Never:
         return QIcon::fromTheme(QStringLiteral("emblem-error"));
     case UserID::Undefined:
     case UserID::Unknown:
     default:
         return QIcon::fromTheme(QStringLiteral("emblem-information"));
     }
 }
 }
 
 // Icon for certificate selection indication
 QIcon Formatting::iconForUid(const UserID &uid)
 {
     return iconForValidity(uid.validity());
 }
 
 QString Formatting::validity(const UserID &uid)
 {
     switch (uid.validity()) {
     case UserID::Ultimate:
         return i18n("The certificate is marked as your own.");
     case UserID::Full:
         return i18n("The certificate belongs to this recipient.");
     case UserID::Marginal:
         return i18n("The trust model indicates marginally that the certificate belongs to this recipient.");
     case UserID::Never:
         return i18n("This certificate should not be used.");
     case UserID::Undefined:
     case UserID::Unknown:
     default:
         return i18n("There is no indication that this certificate belongs to this recipient.");
     }
 }
 
 QString Formatting::validity(const KeyGroup &group)
 {
     if (group.isNull()) {
         return QString();
     }
 
     const KeyGroup::Keys &keys = group.keys();
     if (keys.size() == 0) {
         return i18n("This group does not contain any keys.");
     }
 
     return getValidityStatement(keys);
 }
 
 namespace
 {
 UserID::Validity minimalValidityOfNotRevokedUserIDs(const Key &key)
 {
     std::vector<UserID> userIDs = key.userIDs();
     const auto endOfNotRevokedUserIDs = std::remove_if(userIDs.begin(), userIDs.end(), std::mem_fn(&UserID::isRevoked));
     const int minValidity = std::accumulate(userIDs.begin(), endOfNotRevokedUserIDs, UserID::Ultimate + 1, [](int validity, const UserID &userID) {
         return std::min(validity, static_cast<int>(userID.validity()));
     });
     return minValidity <= UserID::Ultimate ? static_cast<UserID::Validity>(minValidity) : UserID::Unknown;
 }
 
 template<typename Container>
 UserID::Validity minimalValidity(const Container &keys)
 {
     const int minValidity = std::accumulate(keys.cbegin(), keys.cend(), UserID::Ultimate + 1, [](int validity, const Key &key) {
         return std::min<int>(validity, minimalValidityOfNotRevokedUserIDs(key));
     });
     return minValidity <= UserID::Ultimate ? static_cast<UserID::Validity>(minValidity) : UserID::Unknown;
 }
 }
 
 QIcon Formatting::validityIcon(const KeyGroup &group)
 {
     return iconForValidity(minimalValidity(group.keys()));
 }
 
 bool Formatting::uidsHaveFullValidity(const Key &key)
 {
     return minimalValidityOfNotRevokedUserIDs(key) >= UserID::Full;
 }
 
 QString Formatting::complianceMode()
 {
     const auto complianceValue = getCryptoConfigStringValue("gpg", "compliance");
     return complianceValue == QLatin1String("gnupg") ? QString() : complianceValue;
 }
 
 bool Formatting::isKeyDeVs(const GpgME::Key &key)
 {
     for (const auto &sub : key.subkeys()) {
         if (sub.isExpired() || sub.isRevoked()) {
             // Ignore old subkeys
             continue;
         }
         if (!sub.isDeVs()) {
             return false;
         }
     }
     return true;
 }
 
 QString Formatting::complianceStringForKey(const GpgME::Key &key)
 {
     // There will likely be more in the future for other institutions
     // for now we only have DE-VS
     if (DeVSCompliance::isCompliant()) {
         return isRemoteKey(key) //
             ? i18nc("@info the compliance of the key with certain requirements is unknown", "unknown")
             : DeVSCompliance::name(uidsHaveFullValidity(key) && isKeyDeVs(key));
     }
     return QString();
 }
 
 QString Formatting::complianceStringShort(const GpgME::Key &key)
 {
     const bool keyValidityChecked = (key.keyListMode() & GpgME::Validate);
     if (keyValidityChecked && Formatting::uidsHaveFullValidity(key)) {
         if (DeVSCompliance::isCompliant() && Formatting::isKeyDeVs(key)) {
             return QStringLiteral("★ ") + DeVSCompliance::name(true);
         }
         return i18nc("As in all user IDs are valid.", "certified");
     }
     if (key.isExpired()) {
         return i18n("expired");
     }
     if (key.isRevoked()) {
         return i18n("revoked");
     }
     if (key.isDisabled()) {
         return i18n("disabled");
     }
     if (key.isInvalid()) {
         return i18n("invalid");
     }
     if (keyValidityChecked) {
         return i18nc("As in not all user IDs are valid.", "not certified");
     }
 
     return i18nc("The validity of the user IDs has not been/could not be checked", "not checked");
 }
 
 QString Formatting::complianceStringShort(const KeyGroup &group)
 {
     const KeyGroup::Keys &keys = group.keys();
 
     const bool allKeysFullyValid = std::all_of(keys.cbegin(), keys.cend(), &Formatting::uidsHaveFullValidity);
     if (allKeysFullyValid) {
         return i18nc("As in all keys are valid.", "all certified");
     }
 
     return i18nc("As in not all keys are valid.", "not all certified");
 }
 
 QString Formatting::prettyID(const char *id)
 {
     if (!id) {
         return QString();
     }
     QString ret = QString::fromLatin1(id).toUpper().replace(QRegularExpression(QStringLiteral("(....)")), QStringLiteral("\\1 ")).trimmed();
     // For the standard 10 group fingerprint let us use a double space in the
     // middle to increase readability
     if (ret.size() == 49) {
         ret.insert(24, QLatin1Char(' '));
     }
     return ret;
 }
 
 QString Formatting::accessibleHexID(const char *id)
 {
     static const QRegularExpression groupOfFourRegExp{QStringLiteral("(?:(.)(.)(.)(.))")};
 
     QString ret;
     ret = QString::fromLatin1(id);
     if (!ret.isEmpty() && (ret.size() % 4 == 0)) {
         ret = ret.replace(groupOfFourRegExp, QStringLiteral("\\1 \\2 \\3 \\4, ")).chopped(2);
     }
     return ret;
 }
 
 QString Formatting::origin(int o)
 {
     switch (o) {
     case Key::OriginKS:
         return i18n("Keyserver");
     case Key::OriginDane:
         return QStringLiteral("DANE");
     case Key::OriginWKD:
         return QStringLiteral("WKD");
     case Key::OriginURL:
         return QStringLiteral("URL");
     case Key::OriginFile:
         return i18n("File import");
     case Key::OriginSelf:
         return i18n("Generated");
     case Key::OriginOther:
     case Key::OriginUnknown:
     default:
         return i18n("Unknown");
     }
 }
 
 QString Formatting::deVsString(bool compliant)
 {
     return DeVSCompliance::name(compliant);
 }
 
 namespace
 {
 QString formatTrustScope(const char *trustScope)
 {
     static const QRegularExpression escapedNonAlphaNum{QStringLiteral(R"(\\([^0-9A-Za-z]))")};
 
     const auto scopeRegExp = QString::fromUtf8(trustScope);
     if (scopeRegExp.startsWith(u"<[^>]+[@.]") && scopeRegExp.endsWith(u">$")) {
         // looks like a trust scope regular expression created by gpg
         auto domain = scopeRegExp.mid(10, scopeRegExp.size() - 10 - 2);
         domain.replace(escapedNonAlphaNum, QStringLiteral(R"(\1)"));
         return domain;
     }
     return scopeRegExp;
 }
 }
 
 QString Formatting::trustSignatureDomain(const GpgME::UserID::Signature &sig)
 {
-#ifdef GPGMEPP_SUPPORTS_TRUST_SIGNATURES
     return formatTrustScope(sig.trustScope());
-#else
-    return {};
-#endif
 }
 
 QString Formatting::trustSignature(const GpgME::UserID::Signature &sig)
 {
-#ifdef GPGMEPP_SUPPORTS_TRUST_SIGNATURES
     switch (sig.trustValue()) {
     case TrustSignatureTrust::Partial:
         return i18nc("Certifies this key as partially trusted introducer for 'domain name'.",
                      "Certifies this key as partially trusted introducer for '%1'.",
                      trustSignatureDomain(sig));
     case TrustSignatureTrust::Complete:
         return i18nc("Certifies this key as fully trusted introducer for 'domain name'.",
                      "Certifies this key as fully trusted introducer for '%1'.",
                      trustSignatureDomain(sig));
     default:
         return {};
     }
-#else
-    return {};
-#endif
 }