170 lines
2.8 KiB
C++
170 lines
2.8 KiB
C++
//+----------------------------------------------------------------------------
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//
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// File: pwutil.cpp
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//
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// Module: Common Source
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//
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// Synopsis: Simple encryption funcs - borrowed from RAS
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//
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// Copyright (c) 1994-1999 Microsoft Corporation
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//
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// Author: nickball Created 08/03/99
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//
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//+----------------------------------------------------------------------------
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#define PASSWORDMAGIC 0xA5
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VOID
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ReverseSzA(
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CHAR* psz )
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/* Reverses order of characters in 'psz'.
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*/
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{
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CHAR* pszBegin;
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CHAR* pszEnd;
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for (pszBegin = psz, pszEnd = psz + lstrlenA( psz ) - 1;
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pszBegin < pszEnd;
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++pszBegin, --pszEnd)
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{
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CHAR ch = *pszBegin;
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*pszBegin = *pszEnd;
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*pszEnd = ch;
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}
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}
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VOID
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ReverseSzW(
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WCHAR* psz )
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/* Reverses order of characters in 'psz'.
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*/
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{
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WCHAR* pszBegin;
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WCHAR* pszEnd;
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for (pszBegin = psz, pszEnd = psz + lstrlenW( psz ) - 1;
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pszBegin < pszEnd;
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++pszBegin, --pszEnd)
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{
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WCHAR ch = *pszBegin;
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*pszBegin = *pszEnd;
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*pszEnd = ch;
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}
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}
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VOID
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CmDecodePasswordA(
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IN OUT CHAR* pszPassword )
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/* Un-obfuscate 'pszPassword' in place.
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**
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** Returns Nothing
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*/
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{
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CmEncodePasswordA( pszPassword );
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}
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VOID
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CmDecodePasswordW(
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IN OUT WCHAR* pszPassword )
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/* Un-obfuscate 'pszPassword' in place.
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**
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** Returns the address of 'pszPassword'.
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*/
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{
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CmEncodePasswordW( pszPassword );
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}
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VOID
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CmEncodePasswordA(
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IN OUT CHAR* pszPassword )
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/* Obfuscate 'pszPassword' in place to foil memory scans for passwords.
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**
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** Returns Nothing
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*/
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{
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if (pszPassword)
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{
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CHAR* psz;
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ReverseSzA( pszPassword );
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for (psz = pszPassword; *psz != '\0'; ++psz)
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{
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if (*psz != PASSWORDMAGIC)
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*psz ^= PASSWORDMAGIC;
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}
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}
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}
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VOID
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CmEncodePasswordW(
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IN OUT WCHAR* pszPassword )
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/* Obfuscate 'pszPassword' in place to foil memory scans for passwords.
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**
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** Returns Nothing
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*/
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{
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if (pszPassword)
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{
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WCHAR* psz;
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ReverseSzW( pszPassword );
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for (psz = pszPassword; *psz != L'\0'; ++psz)
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{
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if (*psz != PASSWORDMAGIC)
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*psz ^= PASSWORDMAGIC;
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}
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}
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}
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VOID
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CmWipePasswordA(
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IN OUT CHAR* pszPassword )
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/* Zero out the memory occupied by a password.
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**
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** Returns Nothing
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*/
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{
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if (pszPassword)
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{
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CHAR* psz = pszPassword;
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while (*psz != '\0')
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*psz++ = '\0';
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}
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}
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VOID
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CmWipePasswordW(
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IN OUT WCHAR* pszPassword )
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/* Zero out the memory occupied by a password.
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**
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** Returns Nothing
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*/
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{
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if (pszPassword)
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{
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WCHAR* psz = pszPassword;
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while (*psz != L'\0')
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*psz++ = L'\0';
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}
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}
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