Source code of Windows XP (NT5)
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//+-------------------------------------------------------------------------
//
// Microsoft Windows
//
// Copyright (C) Microsoft Corporation, 1997 - 1999
//
// File: sp3crmsg.h
//
//--------------------------------------------------------------------------
//+-------------------------------------------------------------------------
// File: sp3crmsg.h
//
// Contents: Data structure for enabling NT 4.0 SP3 and IE 3.02 compatible
// PKCS #7 EnvelopeData messages.
//
// The SP3 version of crypt32.dll failed to byte reverse the
// encrypted symmetric key. It also added zero salt instead
// of no salt.
//--------------------------------------------------------------------------
#ifndef __SP3CRMSG_H__
#define __SP3CRMSG_H__
#include <wincrypt.h>
#ifdef __cplusplus
extern "C" {
#endif
//+-------------------------------------------------------------------------
// To enable SP3 compatible encryption, the pvEncryptionAuxInfo field in either
// CMSG_ENVELOPED_ENCODE_INFO for CryptMsgOpenToEncode() or
// CRYPT_ENCRYPT_MESSAGE_PARA for CryptSignAndEncryptMessage() or
// CryptSignAndEncryptMessage() should point to the following
// CMSG_SP3_COMPATIBLE_AUX_INFO data structure.
//--------------------------------------------------------------------------
// The following is defined in newer versions of wincrypt.h, starting with
// IE 4.01 and NT 5.0 Beta 2
#ifndef CMSG_SP3_COMPATIBLE_ENCRYPT_FLAG
//+-------------------------------------------------------------------------
// CMSG_SP3_COMPATIBLE_AUX_INFO
//
// AuxInfo for enabling SP3 compatible encryption.
//
// The CMSG_SP3_COMPATIBLE_ENCRYPT_FLAG is set in dwFlags to enable SP3
// compatible encryption. When set, uses zero salt instead of no salt,
// the encryption algorithm parameters are NULL instead of containing the
// encoded RC2 parameters or encoded IV octet string and the encrypted
// symmetric key is encoded little endian instead of big endian.
//--------------------------------------------------------------------------
typedef struct _CMSG_SP3_COMPATIBLE_AUX_INFO {
DWORD cbSize;
DWORD dwFlags;
} CMSG_SP3_COMPATIBLE_AUX_INFO, *PCMSG_SP3_COMPATIBLE_AUX_INFO;
#define CMSG_SP3_COMPATIBLE_ENCRYPT_FLAG 0x80000000
#endif // CMSG_SP3_COMPATIBLE_ENCRYPT_FLAG
#ifdef __cplusplus
} // Balance extern "C" above
#endif
#endif // __SP3CRMSG_H__