//////////////////////////////////////////////////////////////////////////////
//
//  Copyright (c) 1998-2000 Microsoft Corporation.  All Rights Reserved.
//
//     	No portion of this source code may be reproduced
//     	without express written permission of Microsoft Corporation.
//
//     	This source code is proprietary and confidential.
//
//	SYSTEM:		Industry Update
//
//	CLASS:		N/A
//	MODULE:		TRUST.LIB
//	FILE:		TRUST.H
//
/////////////////////////////////////////////////////////////////////
//
//	DESC:	this header file declares functions used to make cabs 
//			signed by certain providers trusted.
//
//	AUTHOR:	Charles Ma, converted from WU CDMLIB
//	DATE:	10/4/2000
//
/////////////////////////////////////////////////////////////////////
//
//	Revision History:
//
//	Date        Author    Description
//	~~~~        ~~~~~~    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//	2002-01-18  KenSh     Added revocation check param to VerifyFileTrust
//
/////////////////////////////////////////////////////////////////////
//

#pragma once


//
// define the number of bytes needed to store a SHA1 hashing value
// of the public key
//
const UINT HASH_VAL_SIZE = 20;		

//
// define structure used to pass in the hash values to the following
// function in order to detect if one of the hash matches the
// public key of the leaf cert of a file.
//
typedef struct _HASH_STRUCT {
	UINT uiCount;
	PBYTE pCerts;
} CERT_HASH_ARRAY, *pCERT_HASH_ARRAY;


/////////////////////////////////////////////////////////////////////////////
// 
// Public Function VerifyFileTrust()
//
// This is a wrapper function for CheckWinTrust that both Whistler 
// and WU classic code should use.
//
// Input:	szFileName - the file with complete path
//			pbSha1HashVae - a pointer to a 20 byte long buffer, containing
//							the signature SHA1 hashing value that should
//							be used to check this file, or NULL for checking
//							known Microsoft cert.
//			fShowBadUI - whether pop up UI in cases 
//						 (1) inproperly signed signature, or
//						 (2) properly signed with a non-MS cert
//          fCheckRevocation - whether the certificat revocation list (CRL) is
//                             checked to see whether any of the certs in the chain
//                             have been revoked. Never prompts the user to initiate
//                             a dial-up connection. Default = FALSE.
//
// Return:	HRESULT - S_OK the file is signed with a valid cert
//					  or error code.
//					  If the file is signed correctly but cert is not
//					  a known Microsoft cert, or it's SHA1 hash does not match
//					  the one passed in, then CERT_UNTRUSTED_ROOT is returned.
//
// Good Cert: Here is the deifnition of a good cert, in addition to the fact
//			  that the signature must be valid and not expired.
//				(1) The signature was signed with a cert that has 
//					"Microsoft Root Authority" as root, or
//				(2) Parameter pbSha1HashVal is not NULL, and the file's SHA1
//					hashing value of signature matches this value, or
//				(3) The signature was signed with one of the following known
//					Microsoft cert's (they are not rooted to MS) and 
//					pbSha1HashVal is NULL.
//					* Microsoft Corporation
//					* Microsoft Corporation MSN
//					* MSNBC Interactive News LLC
//					* Microsoft Corporation MSN (Europe)
//					* Microsoft Corporation (Europe)
//
// Note:	If _WUV3TEST flag is set (for test build), then fShowBadUI is
//			ignored:
//				if reg key SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\wuv3test\WinTrustUI
//				is set to 1, then no UI is shown, and this function always return S_OK;
//				otherwise, UI always show no matter what cert, and return value is same
//				as the live build.
//
/////////////////////////////////////////////////////////////////////////////
HRESULT VerifyFileTrust(
						IN LPCTSTR			szFileName, 
						IN pCERT_HASH_ARRAY	pHashArray,
						BOOL				fShowBadUI,
						BOOL                fCheckRevocation = FALSE
						);


/////////////////////////////////////////////////////////////////////////////
// 
// Public Function ReadWUPolicyShowTrustUI()
//
// Input:	void
//
// Return:	BOOL - FALSE means ShowTrustUI regkey is not present, or is set to 0
//                     TRUE means ShowTrustUI regkey is present and is set to 1
//
//
/////////////////////////////////////////////////////////////////////////////
BOOL ReadWUPolicyShowTrustUI();