1 /*
2     decryptverifyjob.h
3 
4     This file is part of qgpgme, the Qt API binding for gpgme
5     Copyright (c) 2004, 2007 Klarälvdalens Datakonsult AB
6     Copyright (c) 2016 by Bundesamt für Sicherheit in der Informationstechnik
7     Software engineering by Intevation GmbH
8 
9     QGpgME is free software; you can redistribute it and/or
10     modify it under the terms of the GNU General Public License as
11     published by the Free Software Foundation; either version 2 of the
12     License, or (at your option) any later version.
13 
14     QGpgME is distributed in the hope that it will be useful,
15     but WITHOUT ANY WARRANTY; without even the implied warranty of
16     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17     General Public License for more details.
18 
19     You should have received a copy of the GNU General Public License
20     along with this program; if not, write to the Free Software
21     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
22 
23     In addition, as a special exception, the copyright holders give
24     permission to link the code of this program with any edition of
25     the Qt library by Trolltech AS, Norway (or with modified versions
26     of Qt that use the same license as Qt), and distribute linked
27     combinations including the two.  You must obey the GNU General
28     Public License in all respects for all of the code used other than
29     Qt.  If you modify this file, you may extend this exception to
30     your version of the file, but you are not obligated to do so.  If
31     you do not wish to do so, delete this exception statement from
32     your version.
33 */
34 
35 #ifndef __KLEO_DECRYPTVERIFYJOB_H__
36 #define __KLEO_DECRYPTVERIFYJOB_H__
37 
38 #include "job.h"
39 
40 #include <memory>
41 
42 class QByteArray;
43 class QIODevice;
44 
45 namespace GpgME
46 {
47 class Error;
48 class DecryptionResult;
49 class VerificationResult;
50 }
51 
52 namespace QGpgME
53 {
54 
55 /**
56    @short An abstract base class for asynchronous combined decrypters and verifiers
57 
58    To use a DecryptVerifyJob, first obtain an instance from the
59    CryptoBackend implementation, connect the progress() and result()
60    signals to suitable slots and then start the operation with a
61    call to start(). This call might fail, in which case the
62    DecryptVerifyJob instance will have scheduled it's own destruction with
63    a call to QObject::deleteLater().
64 
65    After result() is emitted, the DecryptVerifyJob will schedule it's own
66    destruction by calling QObject::deleteLater().
67 */
68 class QGPGME_EXPORT DecryptVerifyJob : public Job
69 {
70     Q_OBJECT
71 protected:
72     explicit DecryptVerifyJob(QObject *parent);
73 public:
74     ~DecryptVerifyJob();
75 
76     /**
77        Starts the combined decryption and verification operation.
78        \a cipherText is the data to decrypt and later verify.
79     */
80     virtual GpgME::Error start(const QByteArray &cipherText) = 0;
81 
82     /*!
83       \overload
84 
85       If \a plainText is non-null, the plaintext is written
86       there. Otherwise, it will be delivered in the third argument
87       of result().
88 
89       \throws GpgME::Exception if starting fails
90     */
91     virtual void start(const std::shared_ptr<QIODevice> &cipherText, const std::shared_ptr<QIODevice> &plainText = std::shared_ptr<QIODevice>()) = 0;
92 
93     /** Synchronous equivalent of start() */
94     virtual std::pair<GpgME::DecryptionResult, GpgME::VerificationResult>
95     exec(const QByteArray &cipherText, QByteArray &plainText) = 0;
96 
97 Q_SIGNALS:
98     void result(const GpgME::DecryptionResult &decryptionresult,
99                 const GpgME::VerificationResult &verificationresult,
100                 const QByteArray &plainText, const QString &auditLogAsHtml = QString(),
101                 const GpgME::Error &auditLogError = GpgME::Error());
102 };
103 
104 }
105 
106 #endif // __KLEO_DECRYPTVERIFYJOB_H__
107