qt: Support verification of detached signatures directly from files

* lang/qt/src/Makefile.am: Add new files.
* lang/qt/src/job.cpp (VerifyDetachedJob): Move definition of
constructor and destructor and inclusion of the moc file to the
corresponding .cpp file.
* lang/qt/src/verifydetachedjob.cpp: New.
* lang/qt/src/verifydetachedjob.h (VerifyDetachedJob): Add member
functions setSignatureFile, signatureFile, setSignedFile, signedFile.
* lang/qt/src/verifydetachedjob_p.h: New.
* lang/qt/src/qgpgmeverifydetachedjob.cpp (class
QGpgMEVerifyDetachedJobPrivate): New.
(QGpgMEVerifyDetachedJob::QGpgMEVerifyDetachedJob): Instantiate private
job class.
(verify_from_filename): New.

* lang/qt/tests/Makefile.am: Add new test program.
* lang/qt/tests/run-verifydetachedjob.cpp: New.
--

This makes it possible to tell gpg to read the input directly from the
specified files bypassing GpgME's Data IO when verifying a detached
signature.

GnuPG-bug-id: 6550

8 files changed, 345 insertions, 10 deletions

diff --git a/lang/qt/src/Makefile.am b/lang/qt/src/Makefile.am
index 81e07ce6..b696dc66 100644
--- a/lang/qt/src/Makefile.am
+++ b/lang/qt/src/Makefile.am
@@ -69,6 +69,7 @@ qgpgme_sources = \
     signjob.cpp \
     dn.cpp cryptoconfig.cpp wkdlookupresult.cpp \
     util.cpp \
+    verifydetachedjob.cpp \
     verifyopaquejob.cpp \
     wkdrefreshjob.cpp
 
@@ -233,6 +234,7 @@ private_qgpgme_headers = \
     signjob_p.h \
     threadedjobmixin.h \
     util.h \
+    verifydetachedjob_p.h \
     verifyopaquejob_p.h \
     wkdrefreshjob_p.h
 
diff --git a/lang/qt/src/job.cpp b/lang/qt/src/job.cpp
index dbaba195..8150d9a3 100644
--- a/lang/qt/src/job.cpp
+++ b/lang/qt/src/job.cpp
@@ -45,7 +45,6 @@
 #include "listallkeysjob.h"
 #include "decryptjob.h"
 #include "signkeyjob.h"
-#include "verifydetachedjob.h"
 #include "keygenerationjob.h"
 #include "importjob.h"
 #include "importfromkeyserverjob.h"
@@ -161,7 +160,6 @@ make_job_subclass(KeyListJob)
 make_job_subclass(ListAllKeysJob)
 make_job_subclass(DecryptJob)
 make_job_subclass(SignKeyJob)
-make_job_subclass(VerifyDetachedJob)
 make_job_subclass(KeyGenerationJob)
 make_job_subclass(AbstractImportJob)
 make_job_subclass_ext(ImportJob, AbstractImportJob)
@@ -194,7 +192,6 @@ make_job_subclass(SetPrimaryUserIDJob)
 #include "listallkeysjob.moc"
 #include "decryptjob.moc"
 #include "signkeyjob.moc"
-#include "verifydetachedjob.moc"
 #include "keygenerationjob.moc"
 #include "abstractimportjob.moc"
 #include "importjob.moc"
diff --git a/lang/qt/src/qgpgmeverifydetachedjob.cpp b/lang/qt/src/qgpgmeverifydetachedjob.cpp
index 52d4329b..57b3c368 100644
--- a/lang/qt/src/qgpgmeverifydetachedjob.cpp
+++ b/lang/qt/src/qgpgmeverifydetachedjob.cpp
@@ -39,10 +39,14 @@
 #include "qgpgmeverifydetachedjob.h"
 
 #include "dataprovider.h"
+#include "util.h"
+#include "verifydetachedjob_p.h"
 
-#include "context.h"
-#include "verificationresult.h"
-#include "data.h"
+#include <QFile>
+
+#include <context.h>
+#include <data.h>
+#include <verificationresult.h>
 
 #include <cassert>
 
@@ -50,9 +54,36 @@
 using namespace QGpgME;
 using namespace GpgME;
 
+namespace
+{
+
+class QGpgMEVerifyDetachedJobPrivate : public VerifyDetachedJobPrivate
+{
+    QGpgMEVerifyDetachedJob *q = nullptr;
+
+public:
+    QGpgMEVerifyDetachedJobPrivate(QGpgMEVerifyDetachedJob *qq)
+        : q{qq}
+    {
+    }
+
+    ~QGpgMEVerifyDetachedJobPrivate() override = default;
+
+private:
+    GpgME::Error startIt() override;
+
+    void startNow() override
+    {
+        q->run();
+    }
+};
+
+}
+
 QGpgMEVerifyDetachedJob::QGpgMEVerifyDetachedJob(Context *context)
     : mixin_type(context)
 {
+    setJobPrivate(this, std::unique_ptr<QGpgMEVerifyDetachedJobPrivate>{new QGpgMEVerifyDetachedJobPrivate{this}});
     lateInitialization();
 }
 
@@ -98,6 +129,31 @@ static QGpgMEVerifyDetachedJob::result_type verify_detached_qba(Context *ctx, co
 
 }
 
+static QGpgMEVerifyDetachedJob::result_type verify_from_filename(Context *ctx,
+                                                                 const QString &signatureFilePath,
+                                                                 const QString &signedFilePath)
+{
+    Data signatureData;
+#ifdef Q_OS_WIN
+    signatureData.setFileName(signatureFilePath().toUtf8().constData());
+#else
+    signatureData.setFileName(QFile::encodeName(signatureFilePath).constData());
+#endif
+
+    Data signedData;
+#ifdef Q_OS_WIN
+    signedData.setFileName(signedFilePath().toUtf8().constData());
+#else
+    signedData.setFileName(QFile::encodeName(signedFilePath).constData());
+#endif
+
+    const auto verificationResult = ctx->verifyDetachedSignature(signatureData, signedData);
+
+    Error ae;
+    const QString log = _detail::audit_log_as_html(ctx, ae);
+    return std::make_tuple(verificationResult, log, ae);
+}
+
 Error QGpgMEVerifyDetachedJob::start(const QByteArray &signature, const QByteArray &signedData)
 {
     run(std::bind(&verify_detached_qba, std::placeholders::_1, signature, signedData));
@@ -117,10 +173,22 @@ GpgME::VerificationResult QGpgME::QGpgMEVerifyDetachedJob::exec(const QByteArray
     return mResult;
 }
 
-//PENDING(marc) implement showErrorDialog()
-
 void QGpgME::QGpgMEVerifyDetachedJob::resultHook(const result_type &tuple)
 {
     mResult = std::get<0>(tuple);
 }
+
+GpgME::Error QGpgMEVerifyDetachedJobPrivate::startIt()
+{
+    if (m_signatureFilePath.isEmpty() || m_signedFilePath.isEmpty()) {
+        return Error::fromCode(GPG_ERR_INV_VALUE);
+    }
+
+    q->run([=](Context *ctx) {
+        return verify_from_filename(ctx, m_signatureFilePath, m_signedFilePath);
+    });
+
+    return {};
+}
+
 #include "qgpgmeverifydetachedjob.moc"
diff --git a/lang/qt/src/verifydetachedjob.cpp b/lang/qt/src/verifydetachedjob.cpp
new file mode 100644
index 00000000..11e630c1
--- /dev/null
+++ b/lang/qt/src/verifydetachedjob.cpp
@@ -0,0 +1,74 @@
+/*
+    verifydetachedjob.cpp
+
+    This file is part of qgpgme, the Qt API binding for gpgme
+    Copyright (c) 2024 g10 Code GmbH
+    Software engineering by Ingo Klöcker <[email protected]>
+
+    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.
+*/
+
+#ifdef HAVE_CONFIG_H
+ #include "config.h"
+#endif
+
+#include "verifydetachedjob.h"
+#include "verifydetachedjob_p.h"
+
+using namespace QGpgME;
+
+VerifyDetachedJob::VerifyDetachedJob(QObject *parent)
+    : Job{parent}
+{
+}
+
+VerifyDetachedJob::~VerifyDetachedJob() = default;
+
+void VerifyDetachedJob::setSignatureFile(const QString &path)
+{
+    auto d = jobPrivate<VerifyDetachedJobPrivate>(this);
+    d->m_signatureFilePath = path;
+}
+
+QString VerifyDetachedJob::signatureFile() const
+{
+    auto d = jobPrivate<VerifyDetachedJobPrivate>(this);
+    return d->m_signatureFilePath;
+}
+
+void VerifyDetachedJob::setSignedFile(const QString &path)
+{
+    auto d = jobPrivate<VerifyDetachedJobPrivate>(this);
+    d->m_signedFilePath = path;
+}
+
+QString VerifyDetachedJob::signedFile() const
+{
+    auto d = jobPrivate<VerifyDetachedJobPrivate>(this);
+    return d->m_signedFilePath;
+}
+
+#include "verifydetachedjob.moc"
diff --git a/lang/qt/src/verifydetachedjob.h b/lang/qt/src/verifydetachedjob.h
index 12fdfbb0..c8c516bf 100644
--- a/lang/qt/src/verifydetachedjob.h
+++ b/lang/qt/src/verifydetachedjob.h
@@ -36,7 +36,6 @@
 #define __KLEO_VERIFYDETACHEDJOB_H__
 
 #include "job.h"
-#include "qgpgme_export.h"
 
 #include <memory>
 
@@ -62,6 +61,12 @@ namespace QGpgME
    VerifyDetachedJob instance will have scheduled it's own
    destruction with a call to QObject::deleteLater().
 
+   Alternatively, the job can be started with startIt() after setting
+   the input files. If the job is started this way then the backend reads the
+   input directly from the specified input files. This direct IO mode is
+   currently only supported for OpenPGP. Note that startIt() does not schedule
+   the job's destruction if starting the job failed.
+
    After result() is emitted, the VerifyDetachedJob will schedule
    it's own destruction by calling QObject::deleteLater().
 */
@@ -71,7 +76,23 @@ class QGPGME_EXPORT VerifyDetachedJob : public Job
 protected:
     explicit VerifyDetachedJob(QObject *parent);
 public:
-    ~VerifyDetachedJob();
+    ~VerifyDetachedJob() override;
+
+    /**
+     * Sets the path of the file containing the signature to verify.
+     *
+     * Used if the job is started with startIt().
+     */
+    void setSignatureFile(const QString &path);
+    QString signatureFile() const;
+
+    /**
+     * Sets the path of the file containing the signed data to verify.
+     *
+     * Used if the job is started with startIt().
+     */
+    void setSignedFile(const QString &path);
+    QString signedFile() const;
 
     /**
        Starts the verification operation. \a signature contains the
diff --git a/lang/qt/src/verifydetachedjob_p.h b/lang/qt/src/verifydetachedjob_p.h
new file mode 100644
index 00000000..1fedc8fb
--- /dev/null
+++ b/lang/qt/src/verifydetachedjob_p.h
@@ -0,0 +1,50 @@
+/*
+    verifydetachedjob_p.h
+
+    This file is part of qgpgme, the Qt API binding for gpgme
+    Copyright (c) 2024 g10 Code GmbH
+    Software engineering by Ingo Klöcker <[email protected]>
+
+    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.
+*/
+
+#ifndef __QGPGME_VERIFYDETACHEDJOB_P_H__
+#define __QGPGME_VERIFYDETACHEDJOB_P_H__
+
+#include "job_p.h"
+
+namespace QGpgME
+{
+
+struct VerifyDetachedJobPrivate : public JobPrivate
+{
+    QString m_signatureFilePath;
+    QString m_signedFilePath;
+};
+
+}
+
+#endif // __QGPGME_VERIFYDETACHEDJOB_P_H__
diff --git a/lang/qt/tests/Makefile.am b/lang/qt/tests/Makefile.am
index e3dec517..3e579303 100644
--- a/lang/qt/tests/Makefile.am
+++ b/lang/qt/tests/Makefile.am
@@ -100,6 +100,7 @@ run_receivekeysjob_SOURCES = run-receivekeysjob.cpp
 run_refreshkeysjob_SOURCES = run-refreshkeysjob.cpp
 run_signarchivejob_SOURCES = run-signarchivejob.cpp
 run_signjob_SOURCES = run-signjob.cpp
+run_verifydetachedjob_SOURCES = run-verifydetachedjob.cpp
 run_verifyopaquejob_SOURCES = run-verifyopaquejob.cpp
 run_wkdrefreshjob_SOURCES = run-wkdrefreshjob.cpp
 
@@ -121,6 +122,7 @@ noinst_PROGRAMS = \
 	run-importjob run-exportjob run-receivekeysjob run-refreshkeysjob \
 	run-signarchivejob \
 	run-signjob \
+	run-verifydetachedjob \
 	run-verifyopaquejob \
 	run-wkdrefreshjob
 
diff --git a/lang/qt/tests/run-verifydetachedjob.cpp b/lang/qt/tests/run-verifydetachedjob.cpp
new file mode 100644
index 00000000..6ee21109
--- /dev/null
+++ b/lang/qt/tests/run-verifydetachedjob.cpp
@@ -0,0 +1,121 @@
+/*
+    run-verifydetachedjob.cpp
+
+    This file is part of QGpgME's test suite.
+    Copyright (c) 2024 by g10 Code GmbH
+    Software engineering by Ingo Klöcker <[email protected]>
+
+    QGpgME is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License,
+    version 2, as published by the Free Software Foundation.
+
+    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.
+*/
+
+#ifdef HAVE_CONFIG_H
+ #include "config.h"
+#endif
+
+#include <protocol.h>
+#include <verifydetachedjob.h>
+
+#include <QCommandLineParser>
+#include <QCoreApplication>
+#include <QDebug>
+#include <QFile>
+
+#include <context.h>
+#include <verificationresult.h>
+
+#include <iostream>
+
+using namespace GpgME;
+
+std::ostream &operator<<(std::ostream &os, const QString &s)
+{
+    return os << s.toLocal8Bit().constData();
+}
+
+struct CommandLineOptions {
+    QString signatureFile;
+    QString signedFile;
+};
+
+CommandLineOptions parseCommandLine(const QStringList &arguments)
+{
+    CommandLineOptions options;
+
+    QCommandLineParser parser;
+    parser.setApplicationDescription("Test program for VerifyDetachedJob");
+    parser.addHelpOption();
+    parser.addPositionalArgument("signature", "Detached SIGNATURE to verify", "SIGNATURE");
+    parser.addPositionalArgument("signed file", "FILE containing the signed data", "FILE");
+
+    parser.process(arguments);
+
+    const auto args = parser.positionalArguments();
+    if (args.size() != 2) {
+        parser.showHelp(1);
+    }
+
+    options.signatureFile = args[0];
+    options.signedFile = args[1];
+
+    return options;
+}
+
+int main(int argc, char **argv)
+{
+    GpgME::initializeLibrary();
+
+    QCoreApplication app{argc, argv};
+    app.setApplicationName("run-verifydetachedjob");
+
+    const auto options = parseCommandLine(app.arguments());
+
+    auto job = QGpgME::openpgp()->verifyDetachedJob();
+    if (!job) {
+        std::cerr << "Error: Could not create job" << std::endl;
+        return 1;
+    }
+    QObject::connect(job,
+                     &QGpgME::VerifyDetachedJob::result,
+                     &app,
+                     [](const GpgME::VerificationResult &verificationResult,
+                        const QString &auditLog,
+                        const GpgME::Error &) {
+        std::cerr << "Diagnostics: " << auditLog << std::endl;
+        std::cerr << "Verification Result: " << verificationResult << std::endl;
+        qApp->quit();
+    });
+
+    std::shared_ptr<QFile> input;
+    GpgME::Error err;
+    job->setSignatureFile(options.signatureFile);
+    job->setSignedFile(options.signedFile);
+    err = job->startIt();
+    if (err) {
+        std::cerr << "Error: Starting the job failed: " << err.asString() << std::endl;
+        return 1;
+    }
+
+    return app.exec();
+}