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diff --git a/common/ValidateNewValveCDKeyClient.h b/common/ValidateNewValveCDKeyClient.h
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+++ b/common/ValidateNewValveCDKeyClient.h
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+
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//
+//=============================================================================//
+/*******************************************************************************
+**
+** Contents:
+**
+**		This file provides the public interface to the Steam service.  This
+**		interface is described in the SDK documentation.
+**
+******************************************************************************/
+
+
+#ifndef INCLUDED_VALIDATENEWVALVECDKEYCLIENT_H
+#define INCLUDED_VALIDATENEWVALVECDKEYCLIENT_H
+
+
+#if defined(_MSC_VER) && (_MSC_VER > 1000)
+#pragma once
+#endif
+
+
+#ifndef INCLUDED_STEAM_COMMON_STEAMCOMMON_H
+	#include "steamcommon.h"
+#endif
+
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+
+	// Note: this function expects the CDkey to contain dashes to split it into groups of 5 characters.
+	//
+	// e.g.		5WV2E-CDL82-89AQ4-ZZKH8-L27IB		(note: this example is not a valid key)
+	//
+	ESteamError	SteamWeakVerifyNewValveCDKey
+					(
+						const char *	pszCDKeyFormattedForCDLabel,
+						uint *			pReceiveGameCode,
+						uint *			pReceiveSalesTerritoryCode,
+						uint *			pReceiveUniqueSerialNumber
+					);
+
+	// This returns data ready to send to the validation server.  
+	// If you want to store a CDKey in the registry, consider passing the 
+	// output of this function through one of the functions below, 
+	// to make life harder for registry-harvesting trojans.
+	//
+	// This also does a WeakVerify.
+	ESteamError	SteamGetEncryptedNewValveCDKey
+					(
+						const char *	pszCDKeyFormattedForCDLabel,
+						unsigned int	ClientLocalIPAddr,
+						const void *	pEncryptionKeyReceivedFromAppServer, 
+						unsigned int	uEncryptionKeyLength, 
+						void *			pOutputBuffer, 
+						unsigned int	uSizeOfOutputBuffer, 
+						unsigned int *	pReceiveSizeOfEncryptedNewValveCDKey
+					);
+
+
+	// This pair of functions encrypt and decrypt data using a key based on unique 
+	// properties of this machine.  The resulting encrypted data can only be (easily) 
+	// decrypted on the same machine.  Note: it is NOT impossible to decrypt the data
+	// elsewhere, just inconvenient.
+	ESteamError	SteamEncryptDataForThisMachine
+					(
+						const char *	pDataToEncrypt, 
+						unsigned int	uSizeOfDataToEncrypt, 
+						void *			pOutputBuffer, 
+						unsigned int	uSizeOfOutputBuffer, 
+						unsigned int *	pReceiveSizeOfEncryptedData
+					);
+
+	ESteamError	SteamDecryptDataForThisMachine
+					(
+						const char *	pDataToDecrypt, 
+						unsigned int	uSizeOfDataToDecrypt, 
+						void *			pOutputBuffer, 
+						unsigned int	uSizeOfOutputBuffer, 
+						unsigned int *	pReceiveSizeOfDecryptedData
+					);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* #ifndef INCLUDED_STEAM_COMMON_STEAMCOMMON_H */