os/security/crypto/weakcryptospi/source/cryptoswitch/cryptoswitch.cpp
author sl
Tue, 10 Jun 2014 14:32:02 +0200
changeset 1 260cb5ec6c19
permissions -rw-r--r--
Update contrib.
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/*
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* Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of the License "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: 
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*
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*/
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#include <emulator.h>
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extern "C" {
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#include "cryptography_stubs.h"
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FARPROC vector[MAX_ORDINAL+1];
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void fill_vector(HINSTANCE aDll)
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	{
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	int i;
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	for (i=1;i<=MAX_ORDINAL;i++)
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		{
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		vector[i] = GetProcAddress(aDll, (LPCSTR)i);
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		}
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	vector[0] = (FARPROC)1;		// initialised
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	}
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void init_vector()
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	{
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	__LOCK_HOST;		// prevent deadlock with EKA2 scheduler
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	HINSTANCE instance;
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	// Try for strong cryptography
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	//
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	instance = LoadLibraryA("strong_cryptography.dll"); 
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	if (instance != NULL)
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		{
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		fill_vector(instance);
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		return;
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		}
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	// Try for weak cryptography
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	//
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	instance = LoadLibraryA("weak_cryptography.dll"); 
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	if (instance != NULL)
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		{
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		fill_vector(instance);
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		return;
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		}
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	// die
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	//
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	OutputDebugStringA("Unable to load cryptography implementation");
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	_asm int 3;
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	}
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__declspec(naked) void common_dispatch()
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	{
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	_asm cmp	dword ptr vector,0		// initialised?
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	_asm jne  	call_though_vector
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	_asm push	eax
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	_asm push	ecx
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	_asm push	edx
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	_asm call	init_vector
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	_asm pop	edx
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	_asm pop 	ecx
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	_asm pop 	eax
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call_though_vector:
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	_asm jmp	[vector+eax*4]
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	}
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}