You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
81 lines
2.3 KiB
81 lines
2.3 KiB
/*****************************************************************************\
|
|
* MODULE: encrypt.cxx
|
|
*
|
|
* The module contains routines for encryption and decryption of data
|
|
*
|
|
* Copyright (C) 1996-1998 Microsoft Corporation
|
|
*
|
|
* History:
|
|
* 05/19/00 WeihaiC Created
|
|
*
|
|
\*****************************************************************************/
|
|
|
|
#include "precomp.h"
|
|
|
|
//
|
|
// The caller needs to call LocalFree to free the output data
|
|
//
|
|
|
|
BOOL
|
|
EncryptData (
|
|
PBYTE pDataInput,
|
|
DWORD cbDataInput,
|
|
PBYTE *ppDataOutput,
|
|
PDWORD pcbDataOutput)
|
|
{
|
|
BOOL bRet = FALSE;
|
|
DATA_BLOB DataIn;
|
|
DATA_BLOB DataOut;
|
|
|
|
DataIn.pbData = pDataInput;
|
|
DataIn.cbData = cbDataInput;
|
|
ZeroMemory (&DataOut, sizeof (DATA_BLOB));
|
|
|
|
if(CryptProtectData(&DataIn,
|
|
L"Encrypt", // A description sting.
|
|
NULL, // Optional entropy not used.
|
|
NULL, // Reserved.
|
|
NULL, // Do not pass a PromptStruct.
|
|
CRYPTPROTECT_UI_FORBIDDEN, // Never show UI
|
|
&DataOut)) {
|
|
|
|
bRet = TRUE;
|
|
*ppDataOutput = DataOut.pbData;
|
|
*pcbDataOutput = DataOut.cbData;
|
|
}
|
|
return bRet;
|
|
}
|
|
|
|
BOOL
|
|
DecryptData (
|
|
PBYTE pDataInput,
|
|
DWORD cbDataInput,
|
|
PBYTE *ppDataOutput,
|
|
PDWORD pcbDataOutput)
|
|
{
|
|
BOOL bRet = FALSE;
|
|
DATA_BLOB DataIn;
|
|
DATA_BLOB DataOut;
|
|
LPWSTR pDataDesp;
|
|
|
|
DataIn.pbData = pDataInput;
|
|
DataIn.cbData = cbDataInput;
|
|
ZeroMemory (&DataOut, sizeof (DATA_BLOB));
|
|
|
|
if(CryptUnprotectData(&DataIn,
|
|
&pDataDesp, // A description sting.
|
|
NULL, // Optional entropy not used.
|
|
NULL, // Reserved.
|
|
NULL, // Do not pass a PromptStruct.
|
|
CRYPTPROTECT_UI_FORBIDDEN, // Never show UI
|
|
&DataOut)) {
|
|
|
|
bRet = TRUE;
|
|
*ppDataOutput = DataOut.pbData;
|
|
*pcbDataOutput = DataOut.cbData;
|
|
LocalFree (pDataDesp);
|
|
}
|
|
return bRet;
|
|
}
|
|
|
|
|