Qt: Add KeyForMailboxJob

* lang/qt/src/job.cpp: Include moc and make subclass.
* lang/qt/src/keyformailboxjob.h,
lang/qt/src/qgpgmekeyformailboxjob.cpp,
lang/qt/src/qgpgmekeyformailboxjob.h: New.
* lang/qt/tests/run-keyformailboxjob.cpp: New manual test.
* lang/qt/tests/Makefile.am: Add run-keyformailboxjob.
* lang/qt/src/Makefile.am: Update accordingly.
* lang/qt/src/protocol.h, lang/qt/src/protocol_p.h: Add
keyformailboxjob.

--
The KeyForMailboxjob can be used to determine the best key to
use to encrypt something to a given mail address.

1 files changed, 136 insertions, 0 deletions

diff --git a/lang/qt/src/qgpgmekeyformailboxjob.cpp b/lang/qt/src/qgpgmekeyformailboxjob.cpp
new file mode 100644
index 00000000..0702a365
--- /dev/null
+++ b/lang/qt/src/qgpgmekeyformailboxjob.cpp
@@ -0,0 +1,136 @@
+/*
+    qgpgmekeyformailboxjob.cpp
+
+    This file is part of qgpgme, the Qt API binding for gpgme
+    Copyright (c) 2016 Intevation GmbH
+
+    QGpgME is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; either version 2 of the
+    License, or (at your option) any later version.
+
+    QGpgME is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+    In addition, as a special exception, the copyright holders give
+    permission to link the code of this program with any edition of
+    the Qt library by Trolltech AS, Norway (or with modified versions
+    of Qt that use the same license as Qt), and distribute linked
+    combinations including the two.  You must obey the GNU General
+    Public License in all respects for all of the code used other than
+    Qt.  If you modify this file, you may extend this exception to
+    your version of the file, but you are not obligated to do so.  If
+    you do not wish to do so, delete this exception statement from
+    your version.
+*/
+
+#include "qgpgmekeyformailboxjob.h"
+#include "qgpgmekeylistjob.h"
+
+#include <tuple>
+
+using namespace GpgME;
+using namespace QGpgME;
+
+QGpgMEKeyForMailboxJob::QGpgMEKeyForMailboxJob(Context *context)
+    : mixin_type(context)
+{
+    lateInitialization();
+}
+
+QGpgMEKeyForMailboxJob::~QGpgMEKeyForMailboxJob() {}
+
+static bool keyIsOk(const Key k)
+{
+    return !k.isExpired() && !k.isRevoked() && !k.isInvalid() && !k.isDisabled();
+}
+
+static bool uidIsOk(const UserID uid)
+{
+    return keyIsOk(uid.parent()) && !uid.isRevoked() && !uid.isInvalid();
+}
+
+static bool subkeyIsOk(const Subkey s)
+{
+    return !s.isRevoked() && !s.isInvalid() && !s.isDisabled();
+}
+
+static QGpgMEKeyForMailboxJob::result_type do_work(Context *ctx, const QString &mailbox, bool canEncrypt)
+{
+    /* Do a Keylisting. */
+    ctx->setKeyListMode(GpgME::Extern | GpgME::Local | GpgME::Signatures | GpgME::Validate);
+    std::vector<Key> keys;
+    QGpgMEKeyListJob *keylist = new QGpgMEKeyListJob(ctx);
+
+    KeyListResult result = keylist->exec(QStringList() << mailbox, false, keys);
+
+    if (result.error()) {
+        return std::make_tuple(result, Key(), UserID(), QString(), Error());
+    }
+
+    // This should ideally be decided by GnuPG and this Job changed
+    // to just call the according API in GpgME
+    // See: https://bugs.gnupg.org/gnupg/issue2359
+    Key keyC;
+    UserID uidC;
+    Q_FOREACH (const Key k, keys) {
+        if (canEncrypt && !k.canEncrypt()) {
+            continue;
+        }
+        /* First get the uid that matches the mailbox */
+        Q_FOREACH (const UserID u, k.userIDs()) {
+            if (QString::fromUtf8(u.email()).toLower() == mailbox.toLower()) {
+                if (uidC.isNull()) {
+                    keyC = k;
+                    uidC = u;
+                } else if ((!uidIsOk(uidC) && uidIsOk(u)) || uidC.validity() < u.validity()) {
+                    /* Validity of the new key is better. */
+                    uidC = u;
+                    keyC = k;
+                } else if (uidC.validity() == u.validity() && uidIsOk(u)) {
+                    /* Both are the same check which one is newer. */
+                    time_t oldTime = 0;
+                    Q_FOREACH (const Subkey s, keyC.subkeys()) {
+                        if ((canEncrypt && s.canEncrypt()) && subkeyIsOk(s)) {
+                            oldTime = s.creationTime();
+                        }
+                    }
+                    time_t newTime = 0;
+                    Q_FOREACH (const Subkey s, k.subkeys()) {
+                        if ((canEncrypt && s.canEncrypt()) && subkeyIsOk(s)) {
+                            newTime = s.creationTime();
+                        }
+                    }
+                    if (newTime > oldTime) {
+                        uidC = u;
+                        keyC = k;
+                    }
+                }
+            }
+        }
+    }
+    return std::make_tuple(result, keyC, uidC, QString(), Error());
+}
+
+Error QGpgMEKeyForMailboxJob::start(const QString &mailbox, bool canEncrypt)
+{
+    run(std::bind(&do_work, std::placeholders::_1, mailbox, canEncrypt));
+    return Error();
+}
+
+KeyListResult QGpgMEKeyForMailboxJob::exec(const QString &mailbox, bool canEncrypt, Key &key, UserID &uid)
+{
+    const result_type r = do_work(context(), mailbox, canEncrypt);
+    resultHook(r);
+    key = std::get<1>(r);
+    uid = std::get<2>(r);
+    return std::get<0>(r);
+}
+
+#include "qgpgmekeyformailboxjob.moc"