crypto/weakcrypto/source/cryptoswitch/cryptoswitch.cpp
changeset 0 2c201484c85f
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/crypto/weakcrypto/source/cryptoswitch/cryptoswitch.cpp	Wed Jul 08 11:25:26 2009 +0100
@@ -0,0 +1,83 @@
+/*
+* Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the License "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: 
+*
+*/
+
+
+#include <emulator.h>
+
+
+extern "C" {
+
+#include "cryptography_stubs.h"
+
+FARPROC vector[MAX_ORDINAL+1];
+
+void fill_vector(HINSTANCE aDll)
+	{
+	int i;
+	for (i=1;i<=MAX_ORDINAL;i++)
+		{
+		vector[i] = GetProcAddress(aDll, (LPCSTR)i);
+		}
+	vector[0] = (FARPROC)1;		// initialised
+	}
+
+void init_vector()
+	{
+	__LOCK_HOST;		// prevent deadlock with EKA2 scheduler
+
+	HINSTANCE instance;
+	
+	// Try for strong cryptography
+	//
+	instance = LoadLibraryA("strong_cryptography.dll"); 
+	if (instance != NULL)
+		{
+		fill_vector(instance);
+		return;
+		}
+		
+	// Try for weak cryptography
+	//
+	instance = LoadLibraryA("weak_cryptography.dll"); 
+	if (instance != NULL)
+		{
+		fill_vector(instance);
+		return;
+		}
+	
+	// die
+	//
+	OutputDebugStringA("Unable to load cryptography implementation");
+	_asm int 3;
+	}
+	
+__declspec(naked) void common_dispatch()
+	{
+	_asm cmp	dword ptr vector,0		// initialised?
+	_asm jne  	call_though_vector
+	_asm push	eax
+	_asm push	ecx
+	_asm push	edx
+	_asm call	init_vector
+	_asm pop	edx
+	_asm pop 	ecx
+	_asm pop 	eax
+call_though_vector:
+	_asm jmp	[vector+eax*4]
+	}
+
+}