Line data Source code
1 : /*
2 : qgpgmebackend.cpp
3 :
4 : This file is part of qgpgme, the Qt API binding for gpgme
5 : Copyright (c) 2004,2005 Klarälvdalens Datakonsult AB
6 : Copyright (c) 2016 Intevation GmbH
7 :
8 : QGpgME is free software; you can redistribute it and/or
9 : modify it under the terms of the GNU General Public License as
10 : published by the Free Software Foundation; either version 2 of the
11 : License, or (at your option) any later version.
12 :
13 : QGpgME is distributed in the hope that it will be useful,
14 : but WITHOUT ANY WARRANTY; without even the implied warranty of
15 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 : General Public License for more details.
17 :
18 : You should have received a copy of the GNU General Public License
19 : along with this program; if not, write to the Free Software
20 : Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 :
22 : In addition, as a special exception, the copyright holders give
23 : permission to link the code of this program with any edition of
24 : the Qt library by Trolltech AS, Norway (or with modified versions
25 : of Qt that use the same license as Qt), and distribute linked
26 : combinations including the two. You must obey the GNU General
27 : Public License in all respects for all of the code used other than
28 : Qt. If you modify this file, you may extend this exception to
29 : your version of the file, but you are not obligated to do so. If
30 : you do not wish to do so, delete this exception statement from
31 : your version.
32 : */
33 :
34 : #ifdef HAVE_CONFIG_H
35 : #include "config.h"
36 : #endif
37 :
38 : #include "qgpgmebackend.h"
39 :
40 :
41 : #include "error.h"
42 : #include "engineinfo.h"
43 :
44 : #include "protocol_p.h"
45 :
46 : #include <QFile>
47 : #include <QString>
48 :
49 : const char QGpgME::QGpgMEBackend::OpenPGP[] = "OpenPGP";
50 : const char QGpgME::QGpgMEBackend::SMIME[] = "SMIME";
51 :
52 :
53 6 : QGpgME::QGpgMEBackend::QGpgMEBackend()
54 : : mCryptoConfig(0),
55 : mOpenPGPProtocol(0),
56 6 : mSMIMEProtocol(0)
57 : {
58 6 : GpgME::initializeLibrary();
59 6 : }
60 :
61 0 : QGpgME::QGpgMEBackend::~QGpgMEBackend()
62 : {
63 0 : delete mCryptoConfig; mCryptoConfig = 0;
64 0 : delete mOpenPGPProtocol; mOpenPGPProtocol = 0;
65 0 : delete mSMIMEProtocol; mSMIMEProtocol = 0;
66 0 : }
67 :
68 0 : QString QGpgME::QGpgMEBackend::name() const
69 : {
70 0 : return QStringLiteral("gpgme");
71 : }
72 :
73 0 : QString QGpgME::QGpgMEBackend::displayName() const
74 : {
75 0 : return QStringLiteral("GpgME");
76 : }
77 :
78 0 : QGpgME::CryptoConfig *QGpgME::QGpgMEBackend::config() const
79 : {
80 0 : if (!mCryptoConfig) {
81 0 : if (GpgME::hasFeature(GpgME::GpgConfEngineFeature, 0)) {
82 0 : mCryptoConfig = new QGpgMENewCryptoConfig;
83 : }
84 : }
85 0 : return mCryptoConfig;
86 : }
87 :
88 6 : static bool check(GpgME::Protocol proto, QString *reason)
89 : {
90 6 : if (!GpgME::checkEngine(proto)) {
91 6 : return true;
92 : }
93 0 : if (!reason) {
94 0 : return false;
95 : }
96 : // error, check why:
97 : #if 0
98 : Port away from localised string or delete.
99 : const GpgME::EngineInfo ei = GpgME::engineInfo(proto);
100 : if (ei.isNull()) {
101 : *reason = i18n("GPGME was compiled without support for %1.", proto == GpgME::CMS ? QLatin1String("S/MIME") : QLatin1String("OpenPGP"));
102 : } else if (ei.fileName() && !ei.version()) {
103 : *reason = i18n("Engine %1 is not installed properly.", QFile::decodeName(ei.fileName()));
104 : } else if (ei.fileName() && ei.version() && ei.requiredVersion())
105 : *reason = i18n("Engine %1 version %2 installed, "
106 : "but at least version %3 is required.",
107 : QFile::decodeName(ei.fileName()), QLatin1String(ei.version()), QLatin1String(ei.requiredVersion()));
108 : else {
109 : *reason = i18n("Unknown problem with engine for protocol %1.", proto == GpgME::CMS ? QLatin1String("S/MIME") : QLatin1String("OpenPGP"));
110 : }
111 : #endif
112 0 : return false;
113 : }
114 :
115 6 : bool QGpgME::QGpgMEBackend::checkForOpenPGP(QString *reason) const
116 : {
117 6 : return check(GpgME::OpenPGP, reason);
118 : }
119 :
120 0 : bool QGpgME::QGpgMEBackend::checkForSMIME(QString *reason) const
121 : {
122 0 : return check(GpgME::CMS, reason);
123 : }
124 :
125 0 : bool QGpgME::QGpgMEBackend::checkForProtocol(const char *name, QString *reason) const
126 : {
127 0 : if (qstricmp(name, OpenPGP) == 0) {
128 0 : return check(GpgME::OpenPGP, reason);
129 : }
130 0 : if (qstricmp(name, SMIME) == 0) {
131 0 : return check(GpgME::CMS, reason);
132 : }
133 0 : if (reason) {
134 0 : *reason = QStringLiteral("Unsupported protocol \"%1\"").arg(QLatin1String(name));
135 : }
136 0 : return false;
137 : }
138 :
139 27 : QGpgME::Protocol *QGpgME::QGpgMEBackend::openpgp() const
140 : {
141 27 : if (!mOpenPGPProtocol)
142 6 : if (checkForOpenPGP()) {
143 6 : mOpenPGPProtocol = new ::Protocol(GpgME::OpenPGP);
144 : }
145 27 : return mOpenPGPProtocol;
146 : }
147 :
148 0 : QGpgME::Protocol *QGpgME::QGpgMEBackend::smime() const
149 : {
150 0 : if (!mSMIMEProtocol)
151 0 : if (checkForSMIME()) {
152 0 : mSMIMEProtocol = new ::Protocol(GpgME::CMS);
153 : }
154 0 : return mSMIMEProtocol;
155 : }
156 :
157 0 : QGpgME::Protocol *QGpgME::QGpgMEBackend::protocol(const char *name) const
158 : {
159 0 : if (qstricmp(name, OpenPGP) == 0) {
160 0 : return openpgp();
161 : }
162 0 : if (qstricmp(name, SMIME) == 0) {
163 0 : return smime();
164 : }
165 0 : return 0;
166 : }
167 :
168 0 : bool QGpgME::QGpgMEBackend::supportsProtocol(const char *name) const
169 : {
170 0 : return qstricmp(name, OpenPGP) == 0 || qstricmp(name, SMIME) == 0;
171 : }
172 :
173 0 : const char *QGpgME::QGpgMEBackend::enumerateProtocols(int i) const
174 : {
175 0 : switch (i) {
176 0 : case 0: return OpenPGP;
177 0 : case 1: return SMIME;
178 0 : default: return 0;
179 : }
180 : }
181 :
182 : static QGpgME::QGpgMEBackend *gpgmeBackend;
183 :
184 0 : QGpgME::CryptoConfig *QGpgME::cryptoConfig()
185 : {
186 0 : if (!gpgmeBackend) {
187 0 : gpgmeBackend = new QGpgME::QGpgMEBackend();
188 : }
189 0 : return gpgmeBackend->config();
190 :
191 : }
192 :
193 27 : QGpgME::Protocol *QGpgME::openpgp()
194 : {
195 27 : if (!gpgmeBackend) {
196 6 : gpgmeBackend = new QGpgME::QGpgMEBackend();
197 : }
198 27 : return gpgmeBackend->openpgp();
199 : }
200 :
201 0 : QGpgME::Protocol *QGpgME::smime()
202 : {
203 0 : if (!gpgmeBackend) {
204 0 : gpgmeBackend = new QGpgME::QGpgMEBackend();
205 : }
206 0 : return gpgmeBackend->smime();
207 18 : }
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