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 : #include "qgpgmebackend.h"
35 :
36 :
37 : #include "error.h"
38 : #include "engineinfo.h"
39 :
40 : #include "protocol_p.h"
41 :
42 : #include <QFile>
43 : #include <QString>
44 :
45 : const char QGpgME::QGpgMEBackend::OpenPGP[] = "OpenPGP";
46 : const char QGpgME::QGpgMEBackend::SMIME[] = "SMIME";
47 :
48 :
49 6 : QGpgME::QGpgMEBackend::QGpgMEBackend()
50 : : mCryptoConfig(0),
51 : mOpenPGPProtocol(0),
52 6 : mSMIMEProtocol(0)
53 : {
54 6 : GpgME::initializeLibrary();
55 6 : }
56 :
57 0 : QGpgME::QGpgMEBackend::~QGpgMEBackend()
58 : {
59 0 : delete mCryptoConfig; mCryptoConfig = 0;
60 0 : delete mOpenPGPProtocol; mOpenPGPProtocol = 0;
61 0 : delete mSMIMEProtocol; mSMIMEProtocol = 0;
62 0 : }
63 :
64 0 : QString QGpgME::QGpgMEBackend::name() const
65 : {
66 0 : return QStringLiteral("gpgme");
67 : }
68 :
69 0 : QString QGpgME::QGpgMEBackend::displayName() const
70 : {
71 0 : return QStringLiteral("GpgME");
72 : }
73 :
74 0 : QGpgME::CryptoConfig *QGpgME::QGpgMEBackend::config() const
75 : {
76 0 : if (!mCryptoConfig) {
77 0 : if (GpgME::hasFeature(GpgME::GpgConfEngineFeature, 0)) {
78 0 : mCryptoConfig = new QGpgMENewCryptoConfig;
79 : }
80 : }
81 0 : return mCryptoConfig;
82 : }
83 :
84 6 : static bool check(GpgME::Protocol proto, QString *reason)
85 : {
86 6 : if (!GpgME::checkEngine(proto)) {
87 6 : return true;
88 : }
89 0 : if (!reason) {
90 0 : return false;
91 : }
92 : // error, check why:
93 : #if 0
94 : Port away from localised string or delete.
95 : const GpgME::EngineInfo ei = GpgME::engineInfo(proto);
96 : if (ei.isNull()) {
97 : *reason = i18n("GPGME was compiled without support for %1.", proto == GpgME::CMS ? QLatin1String("S/MIME") : QLatin1String("OpenPGP"));
98 : } else if (ei.fileName() && !ei.version()) {
99 : *reason = i18n("Engine %1 is not installed properly.", QFile::decodeName(ei.fileName()));
100 : } else if (ei.fileName() && ei.version() && ei.requiredVersion())
101 : *reason = i18n("Engine %1 version %2 installed, "
102 : "but at least version %3 is required.",
103 : QFile::decodeName(ei.fileName()), QLatin1String(ei.version()), QLatin1String(ei.requiredVersion()));
104 : else {
105 : *reason = i18n("Unknown problem with engine for protocol %1.", proto == GpgME::CMS ? QLatin1String("S/MIME") : QLatin1String("OpenPGP"));
106 : }
107 : #endif
108 0 : return false;
109 : }
110 :
111 6 : bool QGpgME::QGpgMEBackend::checkForOpenPGP(QString *reason) const
112 : {
113 6 : return check(GpgME::OpenPGP, reason);
114 : }
115 :
116 0 : bool QGpgME::QGpgMEBackend::checkForSMIME(QString *reason) const
117 : {
118 0 : return check(GpgME::CMS, reason);
119 : }
120 :
121 0 : bool QGpgME::QGpgMEBackend::checkForProtocol(const char *name, QString *reason) const
122 : {
123 0 : if (qstricmp(name, OpenPGP) == 0) {
124 0 : return check(GpgME::OpenPGP, reason);
125 : }
126 0 : if (qstricmp(name, SMIME) == 0) {
127 0 : return check(GpgME::CMS, reason);
128 : }
129 0 : if (reason) {
130 0 : *reason = QStringLiteral("Unsupported protocol \"%1\"").arg(QLatin1String(name));
131 : }
132 0 : return false;
133 : }
134 :
135 25 : QGpgME::Protocol *QGpgME::QGpgMEBackend::openpgp() const
136 : {
137 25 : if (!mOpenPGPProtocol)
138 6 : if (checkForOpenPGP()) {
139 6 : mOpenPGPProtocol = new ::Protocol(GpgME::OpenPGP);
140 : }
141 25 : return mOpenPGPProtocol;
142 : }
143 :
144 0 : QGpgME::Protocol *QGpgME::QGpgMEBackend::smime() const
145 : {
146 0 : if (!mSMIMEProtocol)
147 0 : if (checkForSMIME()) {
148 0 : mSMIMEProtocol = new ::Protocol(GpgME::CMS);
149 : }
150 0 : return mSMIMEProtocol;
151 : }
152 :
153 0 : QGpgME::Protocol *QGpgME::QGpgMEBackend::protocol(const char *name) const
154 : {
155 0 : if (qstricmp(name, OpenPGP) == 0) {
156 0 : return openpgp();
157 : }
158 0 : if (qstricmp(name, SMIME) == 0) {
159 0 : return smime();
160 : }
161 0 : return 0;
162 : }
163 :
164 0 : bool QGpgME::QGpgMEBackend::supportsProtocol(const char *name) const
165 : {
166 0 : return qstricmp(name, OpenPGP) == 0 || qstricmp(name, SMIME) == 0;
167 : }
168 :
169 0 : const char *QGpgME::QGpgMEBackend::enumerateProtocols(int i) const
170 : {
171 0 : switch (i) {
172 0 : case 0: return OpenPGP;
173 0 : case 1: return SMIME;
174 0 : default: return 0;
175 : }
176 : }
177 :
178 : static QGpgME::QGpgMEBackend *gpgmeBackend;
179 :
180 0 : QGpgME::CryptoConfig *QGpgME::cryptoConfig()
181 : {
182 0 : if (!gpgmeBackend) {
183 0 : gpgmeBackend = new QGpgME::QGpgMEBackend();
184 : }
185 0 : return gpgmeBackend->config();
186 :
187 : }
188 :
189 25 : QGpgME::Protocol *QGpgME::openpgp()
190 : {
191 25 : if (!gpgmeBackend) {
192 6 : gpgmeBackend = new QGpgME::QGpgMEBackend();
193 : }
194 25 : return gpgmeBackend->openpgp();
195 : }
196 :
197 0 : QGpgME::Protocol *QGpgME::smime()
198 : {
199 0 : if (!gpgmeBackend) {
200 0 : gpgmeBackend = new QGpgME::QGpgMEBackend();
201 : }
202 0 : return gpgmeBackend->smime();
203 18 : }
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