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444 lines
11 KiB
444 lines
11 KiB
15 years ago
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/***************************************************************************
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* Copyright (C) 2006 by Petri Damsten *
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* damu@iki.fi *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
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***************************************************************************/
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#include "kgpgme.h"
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#ifdef HAVE_LIBGPGME
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#include <kapplication.h>
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#include <kmessagebox.h>
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#include <kpassdlg.h>
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#include <kiconloader.h>
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#include <klistview.h>
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#include <kdebug.h>
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#include <qcheckbox.h>
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#include <qlayout.h>
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#include <qlabel.h>
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#include <klocale.h>
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#include <locale.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <unistd.h>
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// KGpgSelKey class based on class in KGpg with the same name
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class KGpgSelKey : public KDialogBase
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{
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private:
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KListView* keysListpr;
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public:
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KGpgSelKey(QWidget *parent, const char *name, QString preselected,
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const KGpgMe& gpg):
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KDialogBase( parent, name, true,i18n("Private Key List"),Ok | Cancel) {
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QString keyname;
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QVBoxLayout* vbox;
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QWidget* page = new QWidget(this);
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QLabel* labeltxt;
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KIconLoader* loader = KGlobal::iconLoader();
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QPixmap keyPair = loader->loadIcon("kgpg_key2", KIcon::Small, 20);
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setMinimumSize(350,100);
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keysListpr = new KListView(page);
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keysListpr->setRootIsDecorated(true);
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keysListpr->addColumn(i18n("Name"));
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keysListpr->addColumn(i18n("Email"));
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keysListpr->addColumn(i18n("ID"));
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keysListpr->setShowSortIndicator(true);
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keysListpr->setFullWidth(true);
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keysListpr->setAllColumnsShowFocus(true);
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labeltxt = new QLabel(i18n("Choose a secret key:"),page);
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vbox = new QVBoxLayout(page);
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KGpgKeyList list = gpg.keys(true);
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for(KGpgKeyList::iterator it = list.begin(); it != list.end(); ++it) {
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QString name = gpg.checkForUtf8((*it).name);
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KListViewItem *item = new
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KListViewItem(keysListpr, name, (*it).email, (*it).id);
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item->setPixmap(0,keyPair);
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if(preselected == (*it).id) {
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keysListpr->setSelected(item, true);
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keysListpr->setCurrentItem(item);
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}
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}
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if(!keysListpr->selectedItem()) {
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keysListpr->setSelected(keysListpr->firstChild(), true);
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keysListpr->setCurrentItem(keysListpr->firstChild());
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}
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vbox->addWidget(labeltxt);
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vbox->addWidget(keysListpr);
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setMainWidget(page);
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};
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QString key() {
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QListViewItem* item = keysListpr->selectedItem();
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if(item)
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return item->text(2);
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return "";
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}
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};
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KGpgMe::KGpgMe() : m_ctx(0), m_useGnuPGAgent(true)
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{
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init(GPGME_PROTOCOL_OpenPGP);
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if(gpgme_new(&m_ctx)) {
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m_ctx = 0;
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}
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else {
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gpgme_set_armor(m_ctx, 1);
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setPassphraseCb();
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}
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}
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KGpgMe::~KGpgMe()
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{
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if(m_ctx)
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gpgme_release(m_ctx);
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clearCache();
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}
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void KGpgMe::clearCache()
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{
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if(m_cache.size() > 0)
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{
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m_cache.fill('\0');
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m_cache.truncate(0);
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}
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}
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void KGpgMe::init(gpgme_protocol_t proto)
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{
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gpgme_error_t err;
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gpgme_check_version(NULL);
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setlocale(LC_ALL, "");
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gpgme_set_locale(NULL, LC_CTYPE, setlocale(LC_CTYPE, NULL));
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gpgme_set_locale(NULL, LC_MESSAGES, setlocale(LC_MESSAGES, NULL));
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err = gpgme_engine_check_version(proto);
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if(err) {
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KMessageBox::error(kapp->activeWindow(), QString("%1: %2")
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.arg(gpgme_strsource(err)).arg(gpgme_strerror(err)));
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}
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}
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QString KGpgMe::checkForUtf8(QString txt)
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{
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// code borrowed from KGpg which borrowed it from gpa
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const char *s;
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// Make sure the encoding is UTF-8.
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// Test structure suggested by Werner Koch
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if(txt.isEmpty())
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return QString::null;
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for(s = txt.ascii(); *s && !(*s & 0x80); s++)
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;
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if (*s && !strchr (txt.ascii(), 0xc3) && (txt.find("\\x")==-1))
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return txt;
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// The string is not in UTF-8
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//if (strchr (txt.ascii(), 0xc3)) return (txt+" +++");
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if (txt.find("\\x")==-1)
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return QString::fromUtf8(txt.ascii());
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// if (!strchr (txt.ascii(), 0xc3) || (txt.find("\\x")!=-1)) {
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for(int idx = 0 ; (idx = txt.find( "\\x", idx )) >= 0 ; ++idx) {
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char str[2] = "x";
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str[0] = (char)QString(txt.mid(idx + 2, 2)).toShort(0, 16);
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txt.replace(idx, 4, str);
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}
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if (!strchr (txt.ascii(), 0xc3))
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return QString::fromUtf8(txt.ascii());
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else
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return QString::fromUtf8(QString::fromUtf8(txt.ascii()).ascii());
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// perform Utf8 twice, or some keys display badly
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return txt;
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}
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QString KGpgMe::selectKey(QString previous)
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{
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KGpgSelKey dlg(kapp->activeWindow(), "", previous, *this);
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if(dlg.exec())
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return dlg.key();
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return "";
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}
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// Rest of the code is mainly based in gpgme examples
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KGpgKeyList KGpgMe::keys(bool privateKeys /* = false */) const
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{
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KGpgKeyList keys;
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gpgme_error_t err = 0, err2 = 0;
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gpgme_key_t key = 0;
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gpgme_keylist_result_t result = 0;
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if(m_ctx) {
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err = gpgme_op_keylist_start(m_ctx, NULL, privateKeys);
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if(!err) {
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while(!(err = gpgme_op_keylist_next(m_ctx, &key))) {
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KGpgKey gpgkey;
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if(!key->subkeys)
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continue;
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gpgkey.id = key->subkeys->keyid;
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if(key->uids) {
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gpgkey.name = key->uids->name;
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gpgkey.email = key->uids->email;
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}
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keys.append(gpgkey);
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gpgme_key_unref(key);
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}
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if (gpg_err_code (err) == GPG_ERR_EOF)
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err = 0;
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err2 = gpgme_op_keylist_end(m_ctx);
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if(!err)
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err = err2;
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}
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}
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if(err) {
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KMessageBox::error(kapp->activeWindow(), QString("%1: %2")
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.arg(gpgme_strsource(err)).arg(gpgme_strerror(err)));
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}
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else {
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result = gpgme_op_keylist_result(m_ctx);
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if (result->truncated) {
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KMessageBox::error(kapp->activeWindow(),
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i18n("Key listing unexpectedly truncated."));
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}
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}
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return keys;
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}
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bool KGpgMe::encrypt(const QByteArray& inBuffer, Q_ULONG length,
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QByteArray* outBuffer, QString keyid /* = QString::null */)
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{
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gpgme_error_t err = 0;
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gpgme_data_t in = 0, out = 0;
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gpgme_key_t keys[2] = { NULL, NULL };
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gpgme_key_t* key = NULL;
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gpgme_encrypt_result_t result = 0;
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outBuffer->resize(0);
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if(m_ctx) {
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err = gpgme_data_new_from_mem(&in, inBuffer.data(), length, 1);
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if(!err) {
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err = gpgme_data_new(&out);
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if(!err) {
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if(keyid.isNull()) {
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key = NULL;
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}
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else {
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err = gpgme_get_key(m_ctx, keyid.ascii(), &keys[0], 0);
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key = keys;
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}
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if(!err) {
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err = gpgme_op_encrypt(m_ctx, key, GPGME_ENCRYPT_ALWAYS_TRUST,
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in, out);
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if(!err) {
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result = gpgme_op_encrypt_result(m_ctx);
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if (result->invalid_recipients) {
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KMessageBox::error(kapp->activeWindow(), QString("%1: %2")
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.arg(i18n("That public key is not meant for encryption"))
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.arg(result->invalid_recipients->fpr));
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}
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else {
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err = readToBuffer(out, outBuffer);
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}
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}
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}
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}
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}
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}
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if(err != GPG_ERR_NO_ERROR && err != GPG_ERR_CANCELED) {
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KMessageBox::error(kapp->activeWindow(), QString("%1: %2")
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.arg(gpgme_strsource(err)).arg(gpgme_strerror(err)));
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}
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if(err != GPG_ERR_NO_ERROR)
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clearCache();
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if(keys[0])
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gpgme_key_unref(keys[0]);
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if(in)
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gpgme_data_release(in);
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if(out)
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gpgme_data_release(out);
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return (err == GPG_ERR_NO_ERROR);
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}
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bool KGpgMe::decrypt(const QByteArray& inBuffer, QByteArray* outBuffer)
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{
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gpgme_error_t err = 0;
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gpgme_data_t in = 0, out = 0;
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gpgme_decrypt_result_t result = 0;
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outBuffer->resize(0);
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if(m_ctx) {
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err = gpgme_data_new_from_mem(&in, inBuffer.data(), inBuffer.size(), 1);
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if(!err) {
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err = gpgme_data_new(&out);
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if(!err) {
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err = gpgme_op_decrypt(m_ctx, in, out);
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if(!err) {
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result = gpgme_op_decrypt_result(m_ctx);
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if(result->unsupported_algorithm) {
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KMessageBox::error(kapp->activeWindow(), QString("%1: %2")
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.arg(i18n("Unsupported algorithm"))
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.arg(result->unsupported_algorithm));
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}
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else {
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err = readToBuffer(out, outBuffer);
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}
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}
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}
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}
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}
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if(err != GPG_ERR_NO_ERROR && err != GPG_ERR_CANCELED) {
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KMessageBox::error(kapp->activeWindow(), QString("%1: %2")
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.arg(gpgme_strsource(err)).arg(gpgme_strerror(err)));
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}
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if(err != GPG_ERR_NO_ERROR)
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clearCache();
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if(in)
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gpgme_data_release(in);
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if(out)
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gpgme_data_release(out);
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return (err == GPG_ERR_NO_ERROR);
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}
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#define BUF_SIZE (32 * 1024)
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gpgme_error_t KGpgMe::readToBuffer(gpgme_data_t in, QByteArray* outBuffer) const
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{
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int ret;
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gpgme_error_t err = GPG_ERR_NO_ERROR;
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ret = gpgme_data_seek(in, 0, SEEK_SET);
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if(ret) {
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err = gpgme_err_code_from_errno(errno);
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}
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else {
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char* buf = new char[BUF_SIZE + 2];
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if(buf) {
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while((ret = gpgme_data_read(in, buf, BUF_SIZE)) > 0) {
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uint size = outBuffer->size();
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if(outBuffer->resize(size + ret))
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memcpy(outBuffer->data() + size, buf, ret);
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}
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if(ret < 0)
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err = gpgme_err_code_from_errno(errno);
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delete[] buf;
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}
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}
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return err;
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}
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bool KGpgMe::isGnuPGAgentAvailable()
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{
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QString agent_info = getenv("GPG_AGENT_INFO");
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if (agent_info.find(':') > 0)
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return true;
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return false;
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}
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void KGpgMe::setPassphraseCb()
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{
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bool agent = false;
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QString agent_info;
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agent_info = getenv("GPG_AGENT_INFO");
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if(m_useGnuPGAgent)
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{
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if (agent_info.find(':'))
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agent = true;
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if(agent_info.startsWith("disable:"))
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setenv("GPG_AGENT_INFO", agent_info.mid(8), 1);
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}
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else
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{
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if(!agent_info.startsWith("disable:"))
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setenv("GPG_AGENT_INFO", "disable:" + agent_info, 1);
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}
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if (agent)
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gpgme_set_passphrase_cb(m_ctx, 0, 0);
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else
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gpgme_set_passphrase_cb(m_ctx, passphraseCb, this);
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}
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gpgme_error_t KGpgMe::passphraseCb(void* hook, const char* uid_hint,
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const char* passphrase_info,
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int last_was_bad, int fd)
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{
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KGpgMe* gpg = static_cast<KGpgMe*>(hook);
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return gpg->passphrase(uid_hint, passphrase_info, last_was_bad, fd);
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}
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gpgme_error_t KGpgMe::passphrase(const char* uid_hint,
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const char* /*passphrase_info*/,
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int last_was_bad, int fd)
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{
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gpgme_error_t res = GPG_ERR_CANCELED;
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QString s;
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QString gpg_hint = checkForUtf8(uid_hint);
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int result;
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if(last_was_bad){
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s += "<b>" + i18n("Wrong password.") + "</b><br><br>\n\n";
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clearCache();
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}
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if(!m_text.isEmpty())
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s += m_text + "<br>";
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if(!gpg_hint.isEmpty())
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s += gpg_hint;
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if(m_cache.isEmpty()){
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QCString password;
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if(m_saving)
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result = KPasswordDialog::getNewPassword(password, s);
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else
|
||
|
result = KPasswordDialog::getPassword(password, s);
|
||
|
|
||
|
if(result == KPasswordDialog::Accepted)
|
||
|
m_cache = password;
|
||
|
}
|
||
|
else
|
||
|
result = KPasswordDialog::Accepted;
|
||
|
|
||
|
if(result == KPasswordDialog::Accepted) {
|
||
|
write(fd, m_cache.data(), m_cache.length());
|
||
|
res = 0;
|
||
|
}
|
||
|
write(fd, "\n", 1);
|
||
|
return res;
|
||
|
}
|
||
|
#endif // HAVE_LIBGPGME
|