103 lines
2.4 KiB
C++
103 lines
2.4 KiB
C++
#include "wudetect.h"
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/////////////////////////////////////////////////////////////////////////////
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// CExpressionParser::fDetectRegKeyExists
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// Detect a substring in registry datum.
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//
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// Form: E=RegKeyExists,<root registry key>, <relative registry path>,[<value name>, [<data type>[, data]]]RegSubstr,<SubStr>,<RootKey>,<KeyPath>,<RegValue>,<RegData>
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/////////////////////////////////////////////////////////////////////////////
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const DWORD WU_MAX_COMPARISON_LEN = 3;
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const DWORD WU_MAX_VERSION_LEN = 30;
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bool CExpressionParser::fDetectRegKeyExists(TCHAR * pszBuf)
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{
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bool fSuccess = false;
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HKEY hKeyRoot;
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HKEY hKey;
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DWORD type;
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TCHAR szRegRoot[MAX_PATH];
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TCHAR szTargetKeyName[MAX_PATH];
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TCHAR szTargetKeyValue[MAX_PATH];
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TCHAR szBuf[MAX_PATH];
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DWORD dwStatus;
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DWORD iToken = 0;
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// Get reg root type (HKLM, etc)
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if ( fMapRegRoot(pszBuf, ++iToken, &hKeyRoot) &&
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(GetStringField2(pszBuf, ++iToken, szTargetKeyName, sizeof(szTargetKeyName)/sizeof(TCHAR)) != 0) )
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{
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// see if the reg key is there.
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if ( RegOpenKeyEx( hKeyRoot,
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szTargetKeyName,
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0,
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KEY_QUERY_VALUE,
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&hKey) == ERROR_SUCCESS )
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{
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if ( GetStringField2(pszBuf, ++iToken, szTargetKeyValue, sizeof(szTargetKeyValue)/sizeof(TCHAR)) != 0 )
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{
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TargetRegValue targetValue;
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dwStatus = dwParseValue(iToken, pszBuf, targetValue);
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if ( dwStatus == ERROR_SUCCESS )
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{
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ActualKeyValue keyvalue;
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DWORD size = sizeof(keyvalue);
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if ( RegQueryValueEx(hKey,
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targetValue.szName,
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0,
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&type,
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(BYTE *)&keyvalue,
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&size) == ERROR_SUCCESS )
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{
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switch ( targetValue.type )
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{
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case REG_NONE:
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{
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fSuccess = true;
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break;
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}
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case REG_DWORD:
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{
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if ( (type == REG_DWORD) ||
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((type == REG_BINARY) && (size >= sizeof(DWORD))) )
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{
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// see if we have a match
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if ( targetValue.dw == keyvalue.dw )
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{
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fSuccess = true;
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}
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}
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break;
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}
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case REG_SZ:
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{
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if ( type == REG_SZ )
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{
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if ( lstrcmpi(targetValue.sz, keyvalue.sz) == 0 )
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{
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fSuccess = true;
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}
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}
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break;
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}
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} // switch
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}
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}
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}
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else
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{
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// no REG value so, REGPATH is sufficient to determine
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// installation.
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fSuccess = true;
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}
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RegCloseKey(hKey);
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}
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}
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return fSuccess;
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}
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