Merge branch 'corencryption' into history, remove file encryption, store key instead of hash

(I forgot to commit the merge before starting work...)

Conflicts:
	qtox.pro

bootstrap.sh

@@ -10,7 +10,7 @@ INSTALL_DIR=libs
 # just for convenience
 BASE_DIR=${SCRIPT_DIR}/${INSTALL_DIR}
 
-SODIUM_VER=0.7.0
+SODIUM_VER=1.0.0
 
 # directory names of cloned repositories
 SODIUM_DIR=libsodium-$SODIUM_VER

qtox.pro

@@ -71,11 +71,11 @@ win32 {
 	    LIBS += -Wl,-Bdynamic -ltbb -lv4l1 -lv4l2 -lgnutls -lrtmp -lgnutls -lavformat -lavcodec -lavutil -lavfilter -lswscale -lusb-1.0
 
         } else {
-            LIBS += -L$$PWD/libs/lib/ -ltoxcore -ltoxencryptsave -ltoxav -lvpx -lopenal -lopencv_core -lopencv_highgui -lopencv_imgproc
+            LIBS += -L$$PWD/libs/lib/ -ltoxcore -ltoxav -ltoxencryptsave -lvpx -lopenal -lopencv_core -lopencv_highgui -lopencv_imgproc
         }
 
         contains(JENKINS, YES) {
-            LIBS = ./libs/lib/libtoxav.a ./libs/lib/libtoxencryptsave.a ./libs/lib/libvpx.a ./libs/lib/libopus.a ./libs/lib/libtoxcore.a ./libs/lib/libsodium.a -lopencv_core -lopencv_highgui -lopenal
+            LIBS = ./libs/lib/libsodium.a ./libs/lib/libtoxcore.a ./libs/lib/libtoxav.a ./libs/lib/libtoxencryptsave.a ./libs/lib/libvpx.a ./libs/lib/libopus.a -lopencv_core -lopencv_highgui -lopenal
         }
     }
 }

src/core.cpp

@@ -21,6 +21,7 @@
 #include "widget/widget.h"
 
 #include <tox/tox.h>
+#include <tox/toxencryptsave.h>
 
 #include <ctime>
 #include <functional>
@@ -113,6 +114,8 @@ Core::~Core()
         alcCloseDevice(alOutDev);
     if (alInDev)
         alcCaptureCloseDevice(alInDev);
+
+    clearPassword();
 }
 
 Core* Core::getInstance()
@@ -1100,14 +1103,27 @@ bool Core::loadConfiguration(QString path)
         }
         else if (error == 1) // Encrypted data save
         {
-            qWarning() << "Core: Can not open encrypted tox save";
-            if (QMessageBox::Ok != QMessageBox::warning(nullptr, tr("Encrypted profile"),
-                tr("Your tox profile seems to be encrypted, qTox can't open it\nDo you want to erase this profile ?"),
-                QMessageBox::Ok | QMessageBox::Cancel))
+            if (!pwsaltedkey)
             {
-                qWarning() << "Core: Couldn't open encrypted save, giving up";
-                configurationFile.close();
-                return false;
+                qWarning() << "Core: Can not open encrypted tox save";
+                if (QMessageBox::Ok != QMessageBox::warning(nullptr, tr("Encrypted profile"),
+                    tr("Your tox profile seems to be encrypted, qTox can't open it\nDo you want to erase this profile ?"),
+                    QMessageBox::Ok | QMessageBox::Cancel))
+                {
+                    qWarning() << "Core: Couldn't open encrypted save, giving up";
+                    configurationFile.close();
+                    return false;
+                }
+            }
+            else
+            { /*
+                while (error != 0)
+                {
+                    error = tox_encrypted_load(tox, reinterpret_cast<uint8_t *>(data.data()), data.size(), pwsaltedkey, TOX_HASH_LENGTH);
+                    emit blockingGetPassword();
+                    if (!pwsaltedkey)
+                        // we need a way to start core without any profile
+                } */
             }
         }
     }
@@ -1137,22 +1153,18 @@ void Core::saveConfiguration()
     }
     
     QString profile = Settings::getInstance().getCurrentProfile();
-    //qDebug() << "saveConf read profile: " << profile;
+
     if (profile == "")
     { // no profile active; this should only happen on startup, if at all
         profile = sanitize(getUsername());
+
         if (profile == "") // happens on creation of a new Tox ID
             profile = getIDString();
-        //qDebug() << "saveConf: read sanitized user as " << profile;
+
         Settings::getInstance().setCurrentProfile(profile);
     }
     
-    QString path = dir + QDir::separator() + profile + TOX_EXT;
-    QFileInfo info(path);
-//    if (!info.exists()) // fall back to old school 'data'
-//    {   //path = dir + QDir::separator() + CONFIG_FILE_NAME;
-//        qDebug() << "Core:" << path << " does not exist";
-//    }
+    QString path = directory.filePath(profile + TOX_EXT);
     
     saveConfiguration(path);
 }
@@ -1174,10 +1186,32 @@ void Core::saveConfiguration(const QString& path)
     }
 
     qDebug() << "Core: writing tox_save to " << path;
-    uint32_t fileSize = tox_size(tox);
+
+    uint32_t fileSize;
+    if (Settings::getInstance().getEncryptTox())
+        fileSize = tox_encrypted_size(tox);
+    else
+        fileSize = tox_size(tox);
+
     if (fileSize > 0 && fileSize <= INT32_MAX) {
         uint8_t *data = new uint8_t[fileSize];
-        tox_save(tox, data);
+
+        if (Settings::getInstance().getEncryptTox())
+        {
+            if (!pwsaltedkey)
+                emit blockingGetPassword();
+            //if (!pwsaltedkey)
+                // revert to unsaved...? or maybe we shouldn't even try to get a pw from here ^
+            int ret = tox_encrypted_save(tox, data, pwsaltedkey, TOX_HASH_LENGTH);
+            if (ret == -1)
+            {
+                qCritical() << "Core::saveConfiguration: encryption of save file failed!!!";
+                return;
+            }
+        }
+        else
+            tox_save(tox, data);
+
         configurationFile.write(reinterpret_cast<char *>(data), fileSize);
         configurationFile.commit();
         delete[] data;
@@ -1193,8 +1227,9 @@ void Core::switchConfiguration(const QString& profile)
     }
     else
         qDebug() << "Core: switching from" << Settings::getInstance().getCurrentProfile() << "to" << profile;
-    saveConfiguration();
     
+    saveConfiguration();
+    clearPassword();
     toxTimer->stop();
     
     if (tox) {
@@ -1488,3 +1523,54 @@ QList<CString> Core::splitMessage(const QString &message)
 
     return splittedMsgs;
 }
+
+void Core::setPassword(QString& password)
+{
+    if (password.isEmpty())
+    {
+        clearPassword();
+        return;
+    }
+    if (!pwsaltedkey)
+        pwsaltedkey = new uint8_t[tox_pass_key_length()];
+
+    CString str(password);
+    tox_derive_key_from_pass(str.data(), str.size(), pwsaltedkey);
+    password.clear();
+}
+
+void Core::clearPassword()
+{
+    if (pwsaltedkey)
+    {
+        delete[] pwsaltedkey;
+        pwsaltedkey = nullptr;
+    }
+}
+
+QByteArray Core::encryptData(const QByteArray& data)
+{
+    if (!pwsaltedkey)
+        return QByteArray();
+    uint8_t encrypted[data.size() + tox_pass_encryption_extra_length()];
+    if (tox_pass_key_encrypt(reinterpret_cast<const uint8_t*>(data.data()), data.size(), pwsaltedkey, encrypted) == -1)
+    {
+        qWarning() << "Core::encryptData: encryption failed";
+        return QByteArray();
+    }
+    return QByteArray(reinterpret_cast<char*>(encrypted), data.size() + tox_pass_encryption_extra_length());
+}
+
+QByteArray Core::decryptData(const QByteArray& data)
+{
+    if (!pwsaltedkey)
+        return QByteArray();
+    int sz = data.size() - tox_pass_encryption_extra_length();
+    uint8_t decrypted[sz];
+    if (tox_pass_key_decrypt(reinterpret_cast<const uint8_t*>(data.data()), data.size(), pwsaltedkey, decrypted) != sz)
+    {
+        qWarning() << "Core::decryptData: decryption failed";
+        return QByteArray();
+    }
+    return QByteArray(reinterpret_cast<char*>(decrypted), sz);
+}

src/core.h

@@ -104,10 +104,16 @@ public slots:
 
     void micMuteToggle(int callId);
 
+    void setPassword(QString& password);
+    void clearPassword();
+    QByteArray encryptData(const QByteArray& data);
+    QByteArray decryptData(const QByteArray& data);
+
 signals:
     void connected();
     void disconnected();
     void blockingClearContacts();
+    void blockingGetPassword();
 
     void friendRequestReceived(const QString& userId, const QString& message);
     void friendMessageReceived(int friendId, const QString& message, bool isAction);
@@ -244,6 +250,7 @@ private:
     int dhtServerId;
     static QList<ToxFile> fileSendQueue, fileRecvQueue;
     static ToxCall calls[];
+    uint8_t* pwsaltedkey = nullptr; // use the pw's hash as the "pw"
 
     static const int videobufsize;
     static uint8_t* videobuf;

src/misc/settings.cpp

@@ -472,6 +472,16 @@ void Settings::setEncryptLogs(bool newValue)
     encryptLogs = newValue;
 }
 
+bool Settings::getEncryptTox() const
+{
+    return encryptTox;
+}
+
+void Settings::setEncryptTox(bool newValue)
+{
+    encryptTox = newValue;
+}
+
 int Settings::getAutoAwayTime() const
 {
     return autoAwayTime;

src/misc/settings.h

@@ -79,6 +79,9 @@ public:
     bool getEncryptLogs() const;
     void setEncryptLogs(bool newValue);
 
+    bool getEncryptTox() const;
+    void setEncryptTox(bool newValue);
+
     int getAutoAwayTime() const;
     void setAutoAwayTime(int newValue);
 
@@ -193,6 +196,7 @@ private:
 
     bool enableLogging;
     bool encryptLogs;
+    bool encryptTox;
 
     int autoAwayTime;
 

src/widget/widget.cpp

@@ -164,6 +164,7 @@ Widget::Widget(QWidget *parent)
     connect(core, &Core::emptyGroupCreated, this, &Widget::onEmptyGroupCreated);
     connect(core, &Core::avInvite, this, &Widget::playRingtone);
     connect(core, &Core::blockingClearContacts, this, &Widget::clearContactsList, Qt::BlockingQueuedConnection);
+    connect(core, &Core::blockingGetPassword, this, &Widget::getPassword, Qt::BlockingQueuedConnection);
 
     connect(core, SIGNAL(messageSentResult(int,QString,int)), this, SLOT(onMessageSendResult(int,QString,int)));
     connect(core, SIGNAL(groupSentResult(int,QString,int)), this, SLOT(onGroupSendResult(int,QString,int)));
@@ -309,7 +310,7 @@ QString Widget::getUsername()
 void Widget::onAvatarClicked()
 {
     QString filename = QFileDialog::getOpenFileName(this, tr("Choose a profile picture"), QDir::homePath());
-    if (filename == "")
+    if (filename.isEmpty())
         return;
     QFile file(filename);
     file.open(QIODevice::ReadOnly);
@@ -909,3 +910,12 @@ void Widget::onGroupSendResult(int groupId, const QString& message, int result)
     if (result == -1)
         g->chatForm->addSystemInfoMessage("Message failed to send", "red", QDateTime::currentDateTime());
 }
+
+void Widget::getPassword()
+{
+    //QString password = QInputDialog();
+    //if (password.isEmpty())
+    //    core->clearPassword();
+    //else
+    //    core->setPassword(password);
+}

src/widget/widget.h

@@ -91,7 +91,7 @@ private slots:
     void setStatusMessage(const QString &statusMessage);
     void addFriend(int friendId, const QString& userId);
     void addFriendFailed(const QString& userId);
-    void onFriendStatusChanged(int friendId, Status status); 
+    void onFriendStatusChanged(int friendId, Status status);
     void onFriendStatusMessageChanged(int friendId, const QString& message);
     void onFriendUsernameChanged(int friendId, const QString& username);
     void onChatroomWidgetClicked(GenericChatroomWidget *);
@@ -112,6 +112,7 @@ private slots:
     void playRingtone();
     void onIconClick();
     void onUserAway();
+    void getPassword();
 
 private:
     void hideMainForms();