CLI: Add Import XML command (keepassxreboot#3572)

The CLI now contains an "import" command that creates a new database from the specified XML export. The new database is in kdbx 4 format, and does not currently accept a keyfile in database creation.

This change is required to create new databases from XML backups.

Fixes keepassxreboot#2458

src/browser/BrowserService.cpp

@@ -616,8 +616,7 @@ QList<Entry*> BrowserService::searchEntries(const QString& url, const StringPair
     // Check if database is connected with KeePassXC-Browser
     auto databaseConnected = [&](const QSharedPointer<Database>& db) {
         for (const StringPair& keyPair : keyList) {
-            QString key =
-                db->metadata()->customData()->value(QLatin1String(ASSOCIATE_KEY_PREFIX) + keyPair.first);
+            QString key = db->metadata()->customData()->value(QLatin1String(ASSOCIATE_KEY_PREFIX) + keyPair.first);
             if (!key.isEmpty() && keyPair.second == key) {
                 return true;
             }

src/cli/CMakeLists.txt

@@ -29,6 +29,7 @@ set(cli_SOURCES
         Export.cpp
         Generate.cpp
         Help.cpp
+        Import.cpp
         List.cpp
         Locate.cpp
         Merge.cpp

src/cli/Command.cpp

@@ -36,6 +36,7 @@
 #include "Export.h"
 #include "Generate.h"
 #include "Help.h"
+#include "Import.h"
 #include "List.h"
 #include "Locate.h"
 #include "Merge.h"
@@ -180,6 +181,7 @@ namespace Commands
             s_commands.insert(QStringLiteral("quit"), QSharedPointer<Command>(new Exit("quit")));
         } else {
             s_commands.insert(QStringLiteral("export"), QSharedPointer<Command>(new Export()));
+            s_commands.insert(QStringLiteral("import"), QSharedPointer<Command>(new Import()));
         }
     }
 

src/cli/Create.cpp

@@ -71,7 +71,7 @@ int Create::execute(const QStringList& arguments)
 
     auto key = QSharedPointer<CompositeKey>::create();
 
-    auto password = getPasswordFromStdin();
+    auto password = Utils::getPasswordFromStdin();
     if (!password.isNull()) {
         key->addKey(password);
     }
@@ -107,28 +107,6 @@ int Create::execute(const QStringList& arguments)
     return EXIT_SUCCESS;
 }
 
-/**
- * Read optional password from stdin.
- *
- * @return Pointer to the PasswordKey or null if passwordkey is skipped
- *         by user
- */
-QSharedPointer<PasswordKey> Create::getPasswordFromStdin()
-{
-    QSharedPointer<PasswordKey> passwordKey;
-    QTextStream out(Utils::STDOUT, QIODevice::WriteOnly);
-
-    out << QObject::tr("Insert password to encrypt database (Press enter to leave blank): ");
-    out.flush();
-    QString password = Utils::getPassword();
-
-    if (!password.isEmpty()) {
-        passwordKey = QSharedPointer<PasswordKey>(new PasswordKey(password));
-    }
-
-    return passwordKey;
-}
-
 /**
  * Load a key file from disk. When the path specified does not exist a
  * new file will be generated. No folders will be generated so the parent

src/cli/Create.h

@@ -21,7 +21,6 @@
 #include "Command.h"
 
 #include "keys/FileKey.h"
-#include "keys/PasswordKey.h"
 
 class Create : public Command
 {
@@ -30,7 +29,6 @@ class Create : public Command
     int execute(const QStringList& arguments) override;
 
 private:
-    QSharedPointer<PasswordKey> getPasswordFromStdin();
     bool loadFileKey(const QString& path, QSharedPointer<FileKey>& fileKey);
 };
 

src/cli/Import.cpp

@@ -0,0 +1,100 @@
+/*
+ *  Copyright (C) 2019 KeePassXC Team <[email protected]>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 2 or (at your option)
+ *  version 3 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <cstdlib>
+#include <stdio.h>
+
+#include <QFileInfo>
+#include <QString>
+#include <QTextStream>
+
+#include "Import.h"
+
+#include "cli/TextStream.h"
+#include "cli/Utils.h"
+#include "core/Database.h"
+#include "keys/CompositeKey.h"
+#include "keys/Key.h"
+
+/**
+ * Create a database file from an XML export of another database.
+ * A password can be specified to encrypt the database.
+ * If none is specified the function will fail.
+ *
+ * If the database is being saved in a non existant directory, the
+ * function will fail.
+ *
+ * @return EXIT_SUCCESS on success, or EXIT_FAILURE on failure
+ */
+Import::Import()
+{
+    name = QString("import");
+    description = QObject::tr("Import the contents of an XML database.");
+    positionalArguments.append({QString("xml"), QObject::tr("Path of the XML database export."), QString("")});
+    positionalArguments.append({QString("database"), QObject::tr("Path of the new database."), QString("")});
+}
+
+int Import::execute(const QStringList& arguments)
+{
+    QSharedPointer<QCommandLineParser> parser = getCommandLineParser(arguments);
+    if (parser.isNull()) {
+        return EXIT_FAILURE;
+    }
+
+    TextStream outputTextStream(parser->isSet(Command::QuietOption) ? Utils::DEVNULL : Utils::STDOUT,
+                                QIODevice::WriteOnly);
+    TextStream errorTextStream(Utils::STDERR, QIODevice::WriteOnly);
+
+    const QStringList args = parser->positionalArguments();
+    const QString xmlExportPath = args.at(0);
+    const QString dbPath = args.at(1);
+
+    if (QFileInfo::exists(dbPath)) {
+        errorTextStream << QObject::tr("File %1 already exists.").arg(dbPath) << endl;
+        return EXIT_FAILURE;
+    }
+
+    auto key = QSharedPointer<CompositeKey>::create();
+
+    auto password = Utils::getPasswordFromStdin();
+    if (!password.isNull()) {
+        key->addKey(password);
+    }
+
+    if (key->isEmpty()) {
+        errorTextStream << QObject::tr("No key is set. Aborting database creation.") << endl;
+        return EXIT_FAILURE;
+    }
+
+    QString errorMessage;
+    Database db;
+    db.setKdf(KeePass2::uuidToKdf(KeePass2::KDF_ARGON2));
+    db.setKey(key);
+
+    if (!db.import(xmlExportPath, &errorMessage)) {
+        errorTextStream << QObject::tr("Unable to import XML database export %1").arg(errorMessage) << endl;
+        return EXIT_FAILURE;
+    }
+
+    if (!db.save(dbPath, &errorMessage, true, false)) {
+        errorTextStream << QObject::tr("Failed to save the database: %1.").arg(errorMessage) << endl;
+        return EXIT_FAILURE;
+    }
+
+    outputTextStream << QObject::tr("Successfully imported database.") << endl;
+    return EXIT_SUCCESS;
+}

src/cli/Import.h

@@ -0,0 +1,30 @@
+/*
+ *  Copyright (C) 2019 KeePassXC Team <[email protected]>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 2 or (at your option)
+ *  version 3 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef KEEPASSXC_IMPORT_H
+#define KEEPASSXC_IMPORT_H
+
+#include "Command.h"
+
+class Import : public Command
+{
+public:
+    Import();
+    int execute(const QStringList& arguments) override;
+};
+
+#endif // KEEPASSXC_IMPORT_H

src/cli/Utils.cpp

@@ -127,7 +127,7 @@ namespace Utils
         }
 
         if (isPasswordProtected) {
-            out << QObject::tr("Insert password to unlock %1: ").arg(databaseFilename) << flush;
+            out << QObject::tr("Enter password to unlock %1: ").arg(databaseFilename) << flush;
             QString line = Utils::getPassword(outputDescriptor);
             auto passwordKey = QSharedPointer<PasswordKey>::create();
             passwordKey->setPassword(line);
@@ -217,6 +217,28 @@ namespace Utils
         return line;
     }
 
+    /**
+     * Read optional password from stdin.
+     *
+     * @return Pointer to the PasswordKey or null if passwordkey is skipped
+     *         by user
+     */
+    QSharedPointer<PasswordKey> getPasswordFromStdin()
+    {
+        QSharedPointer<PasswordKey> passwordKey;
+        QTextStream out(Utils::STDOUT, QIODevice::WriteOnly);
+
+        out << QObject::tr("Enter password to encrypt database (optional): ");
+        out.flush();
+        QString password = Utils::getPassword();
+
+        if (!password.isEmpty()) {
+            passwordKey = QSharedPointer<PasswordKey>(new PasswordKey(password));
+        }
+
+        return passwordKey;
+    }
+
     /**
      * A valid and running event loop is needed to use the global QClipboard,
      * so we need to use this from the CLI.

src/cli/Utils.h

@@ -40,6 +40,7 @@ namespace Utils
 
     void setStdinEcho(bool enable);
     QString getPassword(FILE* outputDescriptor = STDOUT);
+    QSharedPointer<PasswordKey> getPasswordFromStdin();
     int clipText(const QString& text);
     QSharedPointer<Database> unlockDatabase(const QString& databaseFilename,
                                             const bool isPasswordProtected = true,

src/cli/keepassxc-cli.1

@@ -51,6 +51,9 @@ Generates a random password.
 .IP "help [command]"
 Displays a list of available commands, or detailed information about the specified command.
 
+.IP "import [options] <xml> <database>"
+Imports the contents of an XML database to the target database.
+
 .IP "locate [options] <database> <term>"
 Locates all the entries that match a specific search term in a database.
 

src/core/Database.cpp

@@ -22,6 +22,7 @@
 #include "core/Group.h"
 #include "core/Merger.h"
 #include "core/Metadata.h"
+#include "format/KdbxXmlReader.h"
 #include "format/KeePass2Reader.h"
 #include "format/KeePass2Writer.h"
 #include "keys/FileKey.h"
@@ -332,6 +333,24 @@ bool Database::extract(QByteArray& xmlOutput, QString* error)
     return true;
 }
 
+bool Database::import(const QString& xmlExportPath, QString* error)
+{
+    KdbxXmlReader reader(KeePass2::FILE_VERSION_4);
+    QFile file(xmlExportPath);
+    file.open(QIODevice::ReadOnly);
+
+    reader.readDatabase(&file, this);
+
+    if (reader.hasError()) {
+        if (error) {
+            *error = reader.errorString();
+        }
+        return false;
+    }
+
+    return true;
+}
+
 /**
  * Remove the old backup and replace it with a new one
  * backups are named <filename>.old.<extension>

src/core/Database.h

@@ -73,6 +73,7 @@ class Database : public QObject
     bool save(QString* error = nullptr, bool atomic = true, bool backup = false);
     bool save(const QString& filePath, QString* error = nullptr, bool atomic = true, bool backup = false);
     bool extract(QByteArray&, QString* error = nullptr);
+    bool import(const QString& xmlExportPath, QString* error = nullptr);
 
     bool isInitialized() const;
     void setInitialized(bool initialized);