libshell: Password response

Protocol is now able to compose a password challenge response. The LineEditWidget can be used for entering passwords using an echo mode.
skyjake · Feb 11, 2013 · 17eb7f6 · 17eb7f6
1 parent a90cebe
commit 17eb7f6
Show file tree

Hide file tree

Showing 4 changed files with 40 additions and 2 deletions.
diff --git a/doomsday/libshell/include/de/shell/lineeditwidget.h b/doomsday/libshell/include/de/shell/lineeditwidget.h
@@ -67,6 +67,18 @@ class LIBSHELL_PUBLIC LineEditWidget : public TextWidget
      */
     void setLexicon(Lexicon const &lexicon);
 
+    enum EchoMode
+    {
+        NormalEchoMode,
+        PasswordEchoMode
+    };
+
+    /**
+     * Determines how the entered text is drawn on screen.
+     * @param mode  Echo mode.
+     */
+    void setEchoMode(EchoMode mode);
+
     /**
      * Enables or disables the signal emitted when the edit widget receives an
      * Enter key. By default, a signal is emitted.

diff --git a/doomsday/libshell/include/de/shell/protocol.h b/doomsday/libshell/include/de/shell/protocol.h
@@ -163,6 +163,8 @@ class LIBSHELL_PUBLIC Protocol : public de::Protocol
      */
     static PacketType recognize(Packet const *packet);
 
+    static Block passwordResponse(String const &plainPassword);
+
     /**
      * Constructs a console command packet.
      *

diff --git a/doomsday/libshell/src/lineeditwidget.cpp b/doomsday/libshell/src/lineeditwidget.cpp
@@ -36,6 +36,7 @@ DENG2_PIMPL(LineEditWidget)
     String text;
     int cursor; ///< Index in range [0...text.size()]
     Lexicon lexicon;
+    EchoMode echoMode;
     struct Completion
     {
         int pos;
@@ -58,7 +59,8 @@ DENG2_PIMPL(LineEditWidget)
     Instance(Public &i)
         : Base(i),
           signalOnEnter(true),
-          cursor(0)
+          cursor(0),
+          echoMode(NormalEchoMode)
     {
         // Initial height of the command line (1 row).
         height = new ConstantRule(1);
@@ -344,7 +346,14 @@ void LineEditWidget::draw()
     {
         buf.setRichFormatRange(TextCanvas::Char::Underline, d->completion.range());
     }
-    buf.drawWrappedText(Vector2i(d->prompt.size(), 0), d->text, d->wraps, attr);
+
+    // Echo mode determines what we actually draw.
+    String text = d->text;
+    if(d->echoMode == PasswordEchoMode)
+    {
+        text = String(d->text.size(), '*');
+    }
+    buf.drawWrappedText(Vector2i(d->prompt.size(), 0), text, d->wraps, attr);
 
     targetCanvas().draw(buf, pos.topLeft);
 }
@@ -480,6 +489,11 @@ void LineEditWidget::setLexicon(Lexicon const &lexicon)
     d->lexicon = lexicon;
 }
 
+void LineEditWidget::setEchoMode(EchoMode mode)
+{
+    d->echoMode = mode;
+}
+
 void LineEditWidget::setSignalOnEnter(int enterSignal)
 {
     d->signalOnEnter = enterSignal;

diff --git a/doomsday/libshell/src/protocol.cpp b/doomsday/libshell/src/protocol.cpp
@@ -22,6 +22,7 @@
 #include <de/TextValue>
 #include <de/Reader>
 #include <de/Writer>
+#include <QCryptographicHash>
 #include <QList>
 
 namespace de {
@@ -234,6 +235,15 @@ Protocol::PacketType Protocol::recognize(Packet const *packet)
     return Unknown;
 }
 
+Block Protocol::passwordResponse(String const &plainPassword)
+{
+    Block response;
+    response.append("Shell");
+    response += QCryptographicHash::hash(plainPassword.toUtf8(),
+                                         QCryptographicHash::Sha1);
+    return response;
+}
+
 RecordPacket *Protocol::newCommand(String const &command)
 {
     RecordPacket *cmd = new RecordPacket(PT_COMMAND);