【SQL Server CE2.0】创建加密的数据库(源代码)
2016-03-06 09:04
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HRESULT hr = NOERROR; DBPROPSET dbpropset[2]; DBPROP dbprop[1]; // Property array to initialize the provider. DBPROP sscedbprop[2]; // Property array for SSCE security properties INT i = 0; IDBDataSourceAdmin *pIDBDataSourceAdmin = NULL; IUnknown *pIUnknownSession = NULL; IDBInitialize *pIDBInitialize = NULL; // Create an instance of the OLE DB provider. hr = CoCreateInstance(CLSID_SQLSERVERCE_2_0, 0, CLSCTX_INPROC_SERVER, IID_IDBInitialize, (void**)&pIDBInitialize); if(FAILED(hr)) { RETAILMSG(1,(TEXT("1==CoCreateInstance: %d /r/n"),GetLastError())); goto CleanExit; } // Initialize property structures. VariantInit(&dbprop[0].vValue); for (i = 0; i < sizeof(sscedbprop) / sizeof(sscedbprop[0]); i++) { VariantInit(&sscedbprop[i].vValue); } // Leo:To create a new database, you must specify the DBPROP_INIT_DATASOURCE property to // specify a name for the database. dbprop[0].dwPropertyID = DBPROP_INIT_DATASOURCE; dbprop[0].dwOptions = DBPROPOPTIONS_REQUIRED; dbprop[0].vValue.vt = VT_BSTR; dbprop[0].vValue.bstrVal = SysAllocString(L"Encrypted.sdf"); if(NULL == dbprop[0].vValue.bstrVal) { hr = E_OUTOFMEMORY; goto CleanExit; } // Specify the property for encryption. sscedbprop[0].dwPropertyID = DBPROP_SSCE_ENCRYPTDATABASE; sscedbprop[0].dwOptions = DBPROPOPTIONS_REQUIRED; sscedbprop[0].vValue.vt = VT_BOOL; sscedbprop[0].vValue.boolVal = VARIANT_TRUE; // Specify the password. sscedbprop[1].dwPropertyID = DBPROP_SSCE_DBPASSWORD; sscedbprop[1].dwOptions = DBPROPOPTIONS_REQUIRED; sscedbprop[1].vValue.vt = VT_BSTR; sscedbprop[1].vValue.bstrVal = SysAllocString(L"123456"); //密码 if(NULL == sscedbprop[1].vValue.bstrVal) { hr = E_OUTOFMEMORY; goto CleanExit; } // Initialize the property sets. dbpropset[0].guidPropertySet = DBPROPSET_DBINIT; dbpropset[0].rgProperties = dbprop; dbpropset[0].cProperties = sizeof(dbprop)/sizeof(dbprop[0]); dbpropset[1].guidPropertySet = DBPROPSET_SSCE_DBINIT ; dbpropset[1].rgProperties = sscedbprop; dbpropset[1].cProperties = sizeof(sscedbprop)/sizeof(sscedbprop[0]); hr = pIDBInitialize->QueryInterface(IID_IDBDataSourceAdmin,(void **)&pIDBDataSourceAdmin); if(FAILED(hr)) { RETAILMSG(1,(TEXT("1==pIDBInitialize->QueryInterface: %d /r/n"),hr)); goto CleanExit; } // Create and initialize the database. hr = pIDBDataSourceAdmin->CreateDataSource(sizeof(dbpropset)/sizeof(dbpropset[0]), dbpropset, NULL, IID_IUnknown, &pIUnknownSession); if(FAILED(hr)) { RETAILMSG(1,(TEXT("1==pIDBDataSourceAdmin->CreateDataSource: %d /r/n"),hr)); goto CleanExit; } // At this point, the new encrypted database is created. leanExit: VariantClear(&dbprop[0].vValue); SysFreeString(dbprop[0].vValue.bstrVal); for(i = 0;i < sizeof(sscedbprop) / sizeof(sscedbprop[0]);i++) { VariantClear(&sscedbprop[i].vValue); } // Do cleanup tasks here. if(NULL != pIDBDataSourceAdmin) { pIDBDataSourceAdmin->Release(); pIDBDataSourceAdmin = NULL; } if(NULL != pIDBInitialize) { pIDBInitialize->Release(); pIDBInitialize = NULL; } if(NULL != pIUnknownSession) { pIUnknownSession->Release(); pIUnknownSession = NULL; } return;
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