Detect tails, support data persistence

Co-authored-by: Thotbot <thotbot@protonmail.com>
Co-authored-by: Selsta <selsta@sent.at>

13 files changed, 277 insertions, 123 deletions

diff --git a/Logger.cpp b/Logger.cpp
index f2e34552..ad356bcb 100644
--- a/Logger.cpp
+++ b/Logger.cpp
@@ -34,6 +34,7 @@
 #include <QDebug>
 
 #include "Logger.h"
+#include "src/qt/TailsOS.h"
 #include "wallet/api/wallet2_api.h"
 
 // default log path by OS (should be writable)
@@ -66,6 +67,9 @@ const QString getLogPath(const QString logPath)
 {
     const QFileInfo fi(logPath);
 
+    if(TailsOS::detect() && TailsOS::usePersistence)
+        return QDir::homePath() + "/Persistent/Monero/logs/" + defaultLogName;
+
     if(!logPath.isEmpty() && !fi.isDir())
         return fi.absoluteFilePath();
     else {
diff --git a/images/tails-grey.png b/images/tails-grey.png
new file mode 100644
index 00000000..b2e18e42
--- /dev/null
+++ b/images/tails-grey.png
diff --git a/main.cpp b/main.cpp
index a41b3c75..939b78f2 100644
--- a/main.cpp
+++ b/main.cpp
@@ -64,7 +64,7 @@
 #include "MainApp.h"
 #include "qt/ipc.h"
 #include "qt/utils.h"
-#include "qt/mime.h"
+#include "src/qt/TailsOS.h"
 #include "src/qt/KeysFiles.h"
 #include "src/qt/MoneroSettings.h"
 #include "qt/prices.h"
@@ -83,6 +83,7 @@ bool isAndroid = false;
 bool isWindows = false;
 bool isMac = false;
 bool isLinux = false;
+bool isTails = false;
 bool isDesktop = false;
 bool isOpenGL = true;
 
@@ -102,6 +103,7 @@ int main(int argc, char *argv[])
     bool isWindows = true;
 #elif defined(Q_OS_LINUX)
     bool isLinux = true;
+    bool isTails = TailsOS::detect();
 #elif defined(Q_OS_MAC)
     bool isMac = true;
 #endif
@@ -123,25 +125,40 @@ int main(int argc, char *argv[])
 //    qDebug() << "High DPI auto scaling - enabled";
 //#endif
 
+    MainApp app(argc, argv);
+
+    app.setApplicationName("monero-core");
+    app.setOrganizationDomain("getmonero.org");
+    app.setOrganizationName("monero-project");
+
+    // Ask to enable Tails OS persistence mode, it affects:
+    // - Log file location
+    // - QML Settings file location (monero-core.conf)
+    // - Default wallets path
+    // Target directory is: ~/Persistent/Monero
+    if (isTails) {
+        if (!TailsOS::detectDataPersistence())
+            TailsOS::showDataPersistenceDisabledWarning();
+        else
+            TailsOS::askPersistence();
+    }
+
     QString moneroAccountsDir;
     #if defined(Q_OS_WIN) || defined(Q_OS_IOS)
         QStringList moneroAccountsRootDir = QStandardPaths::standardLocations(QStandardPaths::DocumentsLocation);
     #else
         QStringList moneroAccountsRootDir = QStandardPaths::standardLocations(QStandardPaths::HomeLocation);
     #endif
-    if (!moneroAccountsRootDir.empty()) {
+
+    if(isTails && TailsOS::usePersistence){
+        moneroAccountsDir = QDir::homePath() + "/Persistent/Monero/wallets";
+    } else if (!moneroAccountsRootDir.empty()) {
         moneroAccountsDir = moneroAccountsRootDir.at(0) + "/Monero/wallets";
     } else {
         qCritical() << "Error: accounts root directory could not be set";
         return 1;
     }
 
-    MainApp app(argc, argv);
-
-    app.setApplicationName("monero-core");
-    app.setOrganizationDomain("getmonero.org");
-    app.setOrganizationName("monero-project");
-
 #if defined(Q_OS_LINUX)
     if (isDesktop) app.setWindowIcon(QIcon(":/images/appicon.ico"));
 #endif
@@ -174,9 +191,8 @@ int main(int argc, char *argv[])
     }
     qWarning().noquote() << "app startd" << "(log: " + logPath + ")";
 
-#ifdef Q_OS_LINUX
+    // Desktop entry
     registerXdgMime(app);
-#endif
 
     IPC *ipc = new IPC(&app);
     QStringList posArgs = parser.positionalArguments();
@@ -317,6 +333,8 @@ int main(int argc, char *argv[])
 
     engine.rootContext()->setContextProperty("walletLogPath", logPath);
 
+    engine.rootContext()->setContextProperty("tailsUsePersistence", TailsOS::usePersistence);
+
 // Exclude daemon manager from IOS
 #ifndef Q_OS_IOS
     const QStringList arguments = (QStringList) QCoreApplication::arguments().at(0);
@@ -330,7 +348,7 @@ int main(int argc, char *argv[])
     engine.rootContext()->setContextProperty("isIOS", isIOS);
     engine.rootContext()->setContextProperty("isAndroid", isAndroid);
     engine.rootContext()->setContextProperty("isOpenGL", isOpenGL);
-    engine.rootContext()->setContextProperty("isLinux", isLinux);
+    engine.rootContext()->setContextProperty("isTails", isTails);
 
     engine.rootContext()->setContextProperty("screenWidth", geo.width());
     engine.rootContext()->setContextProperty("screenHeight", geo.height());
@@ -354,6 +372,7 @@ int main(int argc, char *argv[])
         accountName = "My monero Account";
 
     engine.rootContext()->setContextProperty("defaultAccountName", accountName);
+    engine.rootContext()->setContextProperty("homePath", QDir::homePath());
     engine.rootContext()->setContextProperty("applicationDirectory", QApplication::applicationDirPath());
     engine.rootContext()->setContextProperty("idealThreadCount", QThread::idealThreadCount());
 
diff --git a/main.qml b/main.qml
index 1655456c..25536f79 100644
--- a/main.qml
+++ b/main.qml
@@ -1349,6 +1349,12 @@ ApplicationWindow {
 
     MoneroSettings {
         id: persistentSettings
+        fileName: {
+            if(isTails && tailsUsePersistence)
+                return homePath + "/Persistent/Monero/monero-core.conf";
+            return "";
+        }
+
         property string language
         property string locale
         property string account_name
diff --git a/monero-wallet-gui.pro b/monero-wallet-gui.pro
index d832ee12..97286b05 100644
--- a/monero-wallet-gui.pro
+++ b/monero-wallet-gui.pro
@@ -65,12 +65,12 @@ HEADERS += \
     MainApp.h \
     src/qt/FutureScheduler.h \
     src/qt/ipc.h \
-    src/qt/mime.h \
     src/qt/KeysFiles.h \
     src/qt/utils.h \
     src/qt/prices.h \
     src/qt/macoshelper.h \
     src/qt/MoneroSettings.h
+    src/qt/TailsOS.h
 
 SOURCES += main.cpp \
     filter.cpp \
@@ -101,11 +101,11 @@ SOURCES += main.cpp \
     MainApp.cpp \
     src/qt/FutureScheduler.cpp \
     src/qt/ipc.cpp \
-    src/qt/mime.cpp \
     src/qt/KeysFiles.cpp \
     src/qt/utils.cpp \
     src/qt/prices.cpp \
-    src/qt/MoneroSettings.cpp
+    src/qt/MoneroSettings.cpp \
+    src/qt/TailsOS.cpp
 
 CONFIG(DISABLE_PASS_STRENGTH_METER) {
     HEADERS -= src/zxcvbn-c/zxcvbn.h
diff --git a/pages/settings/SettingsInfo.qml b/pages/settings/SettingsInfo.qml
index 938bd122..80e6a129 100644
--- a/pages/settings/SettingsInfo.qml
+++ b/pages/settings/SettingsInfo.qml
@@ -326,6 +326,41 @@ Rectangle {
                 font.pixelSize: 14
                 text: isOpenGL ? "OpenGL" : "Low graphics mode"
             }
+
+            Rectangle {
+                visible: isTails
+                height: 1
+                Layout.topMargin: 2
+                Layout.bottomMargin: 2
+                Layout.fillWidth: true
+                color: MoneroComponents.Style.dividerColor
+                opacity: MoneroComponents.Style.dividerOpacity
+            }
+
+            Rectangle {
+                visible: isTails
+                height: 1
+                Layout.topMargin: 2
+                Layout.bottomMargin: 2
+                Layout.fillWidth: true
+                color: MoneroComponents.Style.dividerColor
+                opacity: MoneroComponents.Style.dividerOpacity
+            }
+
+            MoneroComponents.TextBlock {
+                visible: isTails
+                Layout.fillWidth: true
+                font.pixelSize: 14
+                text: qsTr("Tails: ") + translationManager.emptyString
+            }
+
+            MoneroComponents.TextBlock {
+                visible: isTails
+                Layout.fillWidth: true
+                color: MoneroComponents.Style.dimmedFontColor
+                font.pixelSize: 14
+                text: tailsUsePersistence ? qsTr("persistent") + translationManager.emptyString : qsTr("persistence disabled") + translationManager.emptyString;
+            }
         }
 
         // Copy info to clipboard
diff --git a/qml.qrc b/qml.qrc
index 3bced000..29f68f1a 100644
--- a/qml.qrc
+++ b/qml.qrc
@@ -251,5 +251,6 @@
         <file>images/copy.svg</file>
         <file>images/edit.svg</file>
         <file>images/arrow-right-in-circle-outline-medium-white.svg</file>
+        <file>images/tails-grey.png</file>
     </qresource>
 </RCC>
diff --git a/src/qt/TailsOS.cpp b/src/qt/TailsOS.cpp
new file mode 100644
index 00000000..df2fa92b
--- /dev/null
+++ b/src/qt/TailsOS.cpp
@@ -0,0 +1,100 @@
+#include <QRegExp>
+#include <QMessageBox>
+#include <QPixmap>
+#include <QTranslator>
+
+#include "TailsOS.h"
+#include "utils.h"
+
+bool TailsOS::usePersistence = false;
+QString TailsOS::tailsPathData = QString("/live/persistence/TailsData_unlocked/");
+
+bool TailsOS::detect()
+{
+    if (!fileExists("/etc/os-release"))
+        return false;
+
+    QByteArray data = fileOpen("/etc/os-release");
+    QRegularExpression re("TAILS_PRODUCT_NAME=\"Tails\"");
+    QRegularExpressionMatch os_match = re.match(data);
+    bool matched = os_match.hasMatch();
+
+#ifdef QT_DEBUG
+    if (matched)
+        qDebug() << "Tails OS detected";
+#endif
+
+    return matched;
+}
+
+bool TailsOS::detectDataPersistence()
+{
+    return QDir(QDir::homePath() + "/Persistent").exists();
+}
+
+bool TailsOS::detectDotPersistence()
+{
+    return QDir(tailsPathData + "dotfiles").exists();
+}
+
+void TailsOS::showDataPersistenceDisabledWarning()
+{
+    QMessageBox msgBox;
+    msgBox.setText(QObject::tr("Warning: persistence disabled"));
+    msgBox.setWindowTitle(QObject::tr("Warning: persistence disabled"));
+    msgBox.setInformativeText(
+        QObject::tr("Monero GUI has detected that Tails persistence is "
+                     "currently disabled. Any configurations you make inside "
+                     "the Monero GUI will not be saved."
+                     "\n\n"
+                     "In addition, make sure to not save your wallet on the "
+                     "filesystem, as it will be lost at shutdown."
+                     "\n\n"
+                     "To enable Tails persistence, setup an encrypted volume "
+                     "and restart Tails. To gain a startup menu item, "
+                     "enable the Tails \"dotfiles\" feature."));
+
+    msgBox.setStandardButtons(QMessageBox::Ok);
+    msgBox.setDefaultButton(QMessageBox::Ok);
+    msgBox.setIconPixmap(QPixmap(":/images/tails-grey.png"));
+    msgBox.exec();
+}
+
+void TailsOS::askPersistence()
+{
+    QMessageBox msgBox;
+    msgBox.setWindowTitle(QObject::tr("Monero GUI"));
+    msgBox.setText(QObject::tr("Use Tails persistence?"));
+    msgBox.setInformativeText(
+        QObject::tr("Persist wallet files and configuration on the encrypted volume?"
+                    "\n\n"
+                    "In addition, you can enable Tails dotfiles persistence "
+                    "to gain a start menu entry.\n"));
+
+    msgBox.setStandardButtons(QMessageBox::Yes | QMessageBox::No);
+    msgBox.setDefaultButton(QMessageBox::Yes);
+    msgBox.setIconPixmap(QPixmap(":/images/tails-grey.png"));
+    TailsOS::usePersistence = (msgBox.exec() == QMessageBox::Yes);
+}
+
+void TailsOS::persistXdgMime(QString filePath, QString data)
+{
+    QFileInfo file(filePath);
+    QString tailsPath = tailsPathData + "dotfiles/.local/share/applications/";
+
+    // write to persistent volume
+#ifdef QT_DEBUG
+    qDebug() << "Writing xdg mime: " << tailsPath + file.fileName();
+#endif
+
+    QDir().mkpath(tailsPath);  // ensure directory exists
+    fileWrite(tailsPath + file.fileName(), data);
+
+    // write to current session
+#ifdef QT_DEBUG
+    qDebug() << "Writing xdg mime: " << file.filePath();
+#endif
+
+    QDir().mkpath(file.path());  // ensure directory exists
+    fileWrite(file.filePath(), data);
+}
diff --git a/src/qt/TailsOS.h b/src/qt/TailsOS.h
new file mode 100644
index 00000000..05d5ebd1
--- /dev/null
+++ b/src/qt/TailsOS.h
@@ -0,0 +1,23 @@
+#ifndef TAILSOS_H
+#define TAILSOS_H
+
+#include <QApplication>
+
+
+class TailsOS
+{
+public:
+    TailsOS();
+    static bool detect();
+    static bool detectDataPersistence();
+    static bool detectDotPersistence();
+
+    static void showDataPersistenceDisabledWarning();
+    static void askPersistence();
+    static void persistXdgMime(QString filePath, QString data);
+
+    static bool usePersistence;
+    static QString tailsPathData;
+};
+
+#endif // TAILSOS_H
diff --git a/src/qt/mime.cpp b/src/qt/mime.cpp
deleted file mode 100644
index 6daf4de6..00000000
--- a/src/qt/mime.cpp
+++ /dev/null
@@ -1,70 +0,0 @@
-// Copyright (c) 2014-2019, The Monero Project
-//
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without modification, are
-// permitted provided that the following conditions are met:
-//
-// 1. Redistributions of source code must retain the above copyright notice, this list of
-//    conditions and the following disclaimer.
-//
-// 2. Redistributions in binary form must reproduce the above copyright notice, this list
-//    of conditions and the following disclaimer in the documentation and/or other
-//    materials provided with the distribution.
-//
-// 3. Neither the name of the copyright holder nor the names of its contributors may be
-//    used to endorse or promote products derived from this software without specific
-//    prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
-// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
-// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
-// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#include <QtCore>
-#include <QApplication>
-#include <QFile>
-#include <QTextStream>
-
-#include "mime.h"
-#include "utils.h"
-
-void registerXdgMime(QApplication &app){
-    // MacOS handled via Info.plist
-    // Windows handled in the installer by rbrunner7
-
-    QString xdg = QString(
-            "[Desktop Entry]\n"
-            "Name=Monero GUI\n"
-            "GenericName=Monero-GUI\n"
-            "X-GNOME-FullName=Monero-GUI\n"
-            "Comment=Monero GUI\n"
-            "Keywords=Monero;\n"
-            "Exec=%1 %u\n"
-            "Terminal=false\n"
-            "Type=Application\n"
-            "Icon=monero\n"
-            "Categories=Network;GNOME;Qt;\n"
-            "MimeType=x-scheme-handler/monero;x-scheme-handler/moneroseed\n"
-            "StartupNotify=true\n"
-            "X-GNOME-Bugzilla-Bugzilla=GNOME\n"
-            "X-GNOME-UsesNotifications=true\n"
-    ).arg(app.applicationFilePath());
-
-    QString appPath = QStandardPaths::writableLocation(QStandardPaths::ApplicationsLocation);
-    QString filePath = QString("%1/monero-gui.desktop").arg(appPath);
-
-    qDebug() << QString("Writing %1").arg(filePath);
-    QFile file(filePath);
-    if(file.open(QIODevice::WriteOnly)){
-        QTextStream out(&file); out << xdg << endl;
-        file.close();
-    }
-    else
-        file.close();
-}
diff --git a/src/qt/mime.h b/src/qt/mime.h
deleted file mode 100644
index b79d43a3..00000000
--- a/src/qt/mime.h
+++ /dev/null
@@ -1,36 +0,0 @@
-// Copyright (c) 2014-2019, The Monero Project
-//
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without modification, are
-// permitted provided that the following conditions are met:
-//
-// 1. Redistributions of source code must retain the above copyright notice, this list of
-//    conditions and the following disclaimer.
-//
-// 2. Redistributions in binary form must reproduce the above copyright notice, this list
-//    of conditions and the following disclaimer in the documentation and/or other
-//    materials provided with the distribution.
-//
-// 3. Neither the name of the copyright holder nor the names of its contributors may be
-//    used to endorse or promote products derived from this software without specific
-//    prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
-// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
-// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
-// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#ifndef MIME_H
-#define MIME_H
-
-#include <QApplication>
-
-void registerXdgMime(QApplication &app);
-
-#endif // MIME_H
diff --git a/src/qt/utils.cpp b/src/qt/utils.cpp
index 2407a50e..4418a050 100644
--- a/src/qt/utils.cpp
+++ b/src/qt/utils.cpp
@@ -27,15 +27,35 @@
 // THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include <QtCore>
+#include <QApplication>
 
+#include "src/qt/TailsOS.h"
 #include "utils.h"
 
 bool fileExists(QString path) {
     QFileInfo check_file(path);
-    if (check_file.exists() && check_file.isFile())
+    return check_file.exists() && check_file.isFile();
+}
+
+QByteArray fileOpen(QString path) {
+    QFile file(path);
+    if(!file.open(QFile::ReadOnly | QFile::Text))
+        return QByteArray();
+
+    QByteArray data = file.readAll();
+    file.close();
+    return data;
+}
+
+bool fileWrite(QString path, QString data) {
+    QFile file(path);
+    if(file.open(QIODevice::WriteOnly)){
+        QTextStream out(&file); out << data << endl;
+        file.close();
         return true;
-    else
-        return false;
+    }
+
+    return false;
 }
 
 QString getAccountName(){
@@ -47,6 +67,53 @@ QString getAccountName(){
     return accountName;
 }
 
+QString xdgMime(QApplication &app){
+    return QString(
+        "[Desktop Entry]\n"
+        "Name=Monero GUI\n"
+        "GenericName=Monero-GUI\n"
+        "X-GNOME-FullName=Monero-GUI\n"
+        "Comment=Monero GUI\n"
+        "Keywords=Monero;\n"
+        "Exec=%1 %u\n"
+        "Terminal=false\n"
+        "Type=Application\n"
+        "Icon=monero\n"
+        "Categories=Network;GNOME;Qt;\n"
+        "MimeType=x-scheme-handler/monero;x-scheme-handler/moneroseed\n"
+        "StartupNotify=true\n"
+        "X-GNOME-Bugzilla-Bugzilla=GNOME\n"
+        "X-GNOME-UsesNotifications=true\n"
+    ).arg(app.applicationFilePath());
+}
+
+void registerXdgMime(QApplication &app){
+#ifdef Q_OS_LINUX
+    // Register desktop entry
+    // - MacOS handled via Info.plist
+    // - Windows handled in the installer by rbrunner7
+    // - Linux written to `QStandardPaths::ApplicationsLocation`
+    // - Tails written to persistent dotfiles
+    QString mime = xdgMime(app);
+    QString appPath = QStandardPaths::writableLocation(QStandardPaths::ApplicationsLocation);
+    QString filePath = QString("%1/monero-gui.desktop").arg(appPath);
+
+    if (TailsOS::detect() && TailsOS::detectDotPersistence() && TailsOS::usePersistence) {
+        TailsOS::persistXdgMime(filePath, mime);
+        return;
+    }
+
+    QFileInfo file(filePath);
+    QDir().mkpath(file.path()); // ensure directory exists
+
+#ifdef QT_DEBUG
+    qDebug() << "Writing xdg mime: " << filePath;
+#endif
+
+    fileWrite(filePath, mime);
+#endif
+}
+
 QString randomUserAgent(){
     QStringList urand;
     urand << "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:40.0) Gecko/20100101 Firefox/40.1"
diff --git a/src/qt/utils.h b/src/qt/utils.h
index c18ffdc1..f48dff97 100644
--- a/src/qt/utils.h
+++ b/src/qt/utils.h
@@ -31,9 +31,14 @@
 
 #include <QtCore>
 #include <QRegExp>
+#include <QApplication>
 
 bool fileExists(QString path);
+QByteArray fileOpen(QString path);
+bool fileWrite(QString path, QString data);
 QString getAccountName();
+QString xdgMime(QApplication &app);
+void registerXdgMime(QApplication &app);
 const static QRegExp reURI = QRegExp("^\\w+:\\/\\/([\\w+\\-?\\-_\\-=\\-&]+)");
 QString randomUserAgent();