From c8c8cc517dae089c1241890133837339a716f225 Mon Sep 17 00:00:00 2001
From: Mounir IDRASSI <mounir.idrassi@idrix.fr>
Date: Wed, 10 Dec 2014 19:24:39 +0100
Subject: Linux/MacOSX: Implement generating more than one keyfile, specifying
 the size of the generated keyfiles and letting VeraCrypt choose random size
 values.

---
 src/Main/Forms/KeyfileGeneratorDialog.cpp | 105 +++++++++++++++++++++++++++---
 1 file changed, 95 insertions(+), 10 deletions(-)

(limited to 'src/Main/Forms/KeyfileGeneratorDialog.cpp')

diff --git a/src/Main/Forms/KeyfileGeneratorDialog.cpp b/src/Main/Forms/KeyfileGeneratorDialog.cpp
index ce88ab09..5a24a255 100644
--- a/src/Main/Forms/KeyfileGeneratorDialog.cpp
+++ b/src/Main/Forms/KeyfileGeneratorDialog.cpp
@@ -48,20 +48,97 @@ namespace VeraCrypt
 	{
 		try
 		{
-			FilePathList files = Gui->SelectFiles (Gui->GetActiveWindow(), wxEmptyString, true);
-
-			if (files.empty())
+			int keyfilesCount = NumberOfKeyfiles->GetValue();
+			int keyfilesSize = KeyfilesSize->GetValue();		
+			bool useRandomSize = RandomSizeCheckBox->IsChecked();
+			wxString keyfileBaseName = KeyfilesBaseName->GetValue();
+			keyfileBaseName.Trim(true);
+			keyfileBaseName.Trim(false);
+			
+			if (keyfileBaseName.IsEmpty())
+			{
+				Gui->ShowWarning("KEYFILE_EMPTY_BASE_NAME");
 				return;
-
-			SecureBuffer keyfileBuffer (VolumePassword::MaxSize);
-			RandomNumberGenerator::GetData (keyfileBuffer);
-
+			}
+			
+			wxFileName baseFileName = wxFileName::FileName (keyfileBaseName);
+			if (!baseFileName.IsOk())
+			{
+				Gui->ShowWarning("KEYFILE_INVALID_BASE_NAME");
+				return;
+			}
+			
+			DirectoryPath keyfilesDir = Gui->SelectDirectory (Gui->GetActiveWindow(), LangString["SELECT_KEYFILE_GENERATION_DIRECTORY"], false);
+			if (keyfilesDir.IsEmpty())
+				return;
+				
+			wxFileName dirFileName = wxFileName::DirName( wstring(keyfilesDir).c_str() );
+			if (!dirFileName.IsDirWritable ())
 			{
-				File keyfile;
-				keyfile.Open (*files.front(), File::CreateWrite);
-				keyfile.Write (keyfileBuffer);
+				Gui->ShowWarning(L"You don't have write permission on the selected directory");
+				return;
 			}
+				
+			wxBusyCursor busy;
+			for (int i = 0; i < keyfilesCount; i++)
+			{
+				int bufferLen;
+				if (useRandomSize)
+				{
+					SecureBuffer sizeBuffer (sizeof(int));
+					RandomNumberGenerator::GetData (sizeBuffer, true);
+					
+					memcpy(&bufferLen, sizeBuffer.Ptr(), sizeof(int));
+
+					/* since keyfilesSize < 1024 * 1024, we mask with 0x000FFFFF */
+					bufferLen = (long) (((unsigned long) bufferLen) & 0x000FFFFF);
+
+					bufferLen %= ((1024*1024 - 64) + 1);
+					bufferLen += 64;								
+				}
+				else
+					bufferLen = keyfilesSize;
+
+				SecureBuffer keyfileBuffer (bufferLen);
+				RandomNumberGenerator::GetData (keyfileBuffer, true);
+								
+				wstringstream convertStream;
+				convertStream << i;
+				wxString suffix = L"_";				
+				suffix += convertStream.str().c_str();				
+				
+				wxFileName keyfileName;
+				if (i == 0)
+				{
+					keyfileName.Assign(dirFileName.GetPath(), keyfileBaseName);
+				}
+				else
+				{
+					if (baseFileName.HasExt())
+					{
+						keyfileName.Assign(dirFileName.GetPath(), baseFileName.GetName() + suffix + L"." + baseFileName.GetExt());
+					}
+					else
+					{
+						keyfileName.Assign(dirFileName.GetPath(), keyfileBaseName + suffix);
+					}
+				}
+				
+				if (keyfileName.Exists())
+				{
+					wxString msg = wxString::Format(LangString["KEYFILE_ALREADY_EXISTS"], keyfileName.GetFullPath());
+					if (!Gui->AskYesNo (msg, false, true))
+						return;				
+				}
+
+				{
+					FilePath keyfilePath((const wchar_t*) keyfileName.GetFullPath());
+					File keyfile;
+					keyfile.Open (keyfilePath, File::CreateWrite);
+					keyfile.Write (keyfileBuffer);
+				}
 
+			}
 			Gui->ShowInfo ("KEYFILE_CREATED");
 		}
 		catch (exception &e)
@@ -96,6 +173,14 @@ namespace VeraCrypt
 			RandomPoolStaticText->SetLabel (L"");
 	}
 
+	void KeyfileGeneratorDialog::OnRandomSizeCheckBoxClicked (wxCommandEvent& event)
+	{
+		if (!event.IsChecked())
+			KeyfilesSize->Enable();
+		else
+			KeyfilesSize->Disable();
+	}
+
 	void KeyfileGeneratorDialog::ShowBytes (wxStaticText *textCtrl, const ConstBufferPtr &buffer, bool appendDots)
 	{
 		wxString str;
-- 
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