Mengubah Kata Sandi Pengguna Autentikasi Klien Asli SQL Server (OLE DB)

Berlaku untuk:SQL ServerAzure SQL DatabaseAzure SQL Managed InstanceAzure Synapse Analytics AnalyticsPlatform System (PDW)

Sampel ini menunjukkan cara menggunakan OLE DB untuk mengubah kata sandi akun pengguna di bawah Autentikasi SQL Server.

Penting

Jika memungkinkan, gunakan Autentikasi Windows. Jika Autentikasi Windows tidak tersedia, minta pengguna untuk memasukkan kredensial mereka pada waktu proses. Hindari menyimpan kredensial dalam file. Jika Anda harus mempertahankan kredensial, Anda harus mengenkripsinya dengan API kripto Win32.

Contoh

Sebelum membangun, perbarui . Kode C++ untuk menentukan ID pengguna, kata sandi lama, dan kata sandi baru.

Aplikasi ini tersambung ke instans SQL Server default komputer Anda. Pada beberapa sistem operasi Windows, Anda harus mengubah (localhost) atau (lokal) ke nama instans SQL Server Anda. Untuk menyambungkan ke instans bernama, ubah string koneksi dari L"(local)" ke L"(local)\\name" , di mana nama adalah instans bernama. Secara default, SQL Server Express menginstal ke instans bernama. Pastikan variabel lingkungan INCLUDE Anda menyertakan direktori yang berisi sqlncli.h.

Kompilasi dengan ole32.lib oleaut32.lib.

Untuk membuat sampel ini, Anda memerlukan akun pengguna Autentikasi SQL Server yang kata sandinya Anda kenal. Untuk mengizinkan masuk di bawah Autentikasi SQL Server, buka SQL Server Management Studio, klik kanan pada simpul Server di Object Explorer, dan pilih Properti. Pilih Keamanan dan aktifkan mode SQL Server dan Autentikasi Windows. Untuk menambahkan akun pengguna di bawah Autentikasi SQL Server, klik kanan simpul Keamanan di Object Explorer dan pilih Tambahkan.

Server tempat Anda akan menjalankan sampel ini harus memiliki setidaknya satu login yang diaktifkan untuk Autentikasi SQL Server. Server juga harus diaktifkan untuk mengizinkan masuk Autentikasi SQL Server.

// compile with: ole32.lib oleaut32.lib  
void InitializeAndEstablishConnection();  
  
#define STATUSDUMP(status)  case status : wprintf(L"status"); break;  
  
#define UNICODE  
#define DBINITCONSTANTS  
#define INITGUID  
  
#include <assert.h>  
#include <windows.h>  
#include <stdio.h>  
#include <stddef.h>  
#include <IOSTREAM>  
#include <cguid.h>  
#include <oledb.h>  
#include <oledberr.h>  
  
#include <SQLNCLI.h>  
  
LPMALLOC pMalloc = NULL;  
IDBInitialize * pIDBInitialize = NULL;  
HRESULT hr;  
  
void DumpErrorInfo (IUnknown* pObjectWithError, REFIID IID_InterfaceWithError);  
void DumpErrorInfo (IUnknown* pObjectWithError, REFIID IID_InterfaceWithError, BOOL &has_sql_errors);  
  
int main() {  
   // All the initialization activities in a separate function.  
   InitializeAndEstablishConnection();  
  
   if ( FAILED( pIDBInitialize->Uninitialize() ) )  
      // Uninitialize is not required, but fails if an interface was not released.  
      printf("Problem uninitializing.\n");  
  
   pIDBInitialize->Release();  
   CoUninitialize();  
};  
  
void InitializeAndEstablishConnection() {  
   IDBProperties * pIDBProperties = NULL;  
   const ULONG nInitProps = 4;  
   DBPROP InitProperties[nInitProps];  
   const ULONG nSSInitProps = 1;  
   DBPROP SSInitProperties[nSSInitProps];  
  
   const ULONG nPropSet = 2;  
   DBPROPSET rgInitPropSet[nPropSet];  
  
   // Initialize the COM library.  
   CoInitialize(NULL);  
   CoGetMalloc(1, &pMalloc);  
  
   CLSID clsid;  
   CLSIDFromProgID(L"SQLNCLI11", &clsid);  
  
   // Obtain access to the SQLOLEDB provider.  
   hr = CoCreateInstance( clsid, NULL, CLSCTX_INPROC_SERVER, IID_IDBInitialize, (void **) &pIDBInitialize);  
   if (FAILED(hr))  
      printf("Failed in CoCreateInstance().\n");  
  
   // Initialize the property values needed to establish the connection.  
   for (int i = 0; i < nInitProps; i++)  
      VariantInit(&InitProperties[i].vValue);  
  
   // Specify database name.  
   InitProperties[0].dwPropertyID = DBPROP_INIT_CATALOG;  
   InitProperties[0].vValue.vt = VT_BSTR;  
   // Change the following line to use any database on your server  
   InitProperties[0].vValue.bstrVal = SysAllocString(L"master");  
   InitProperties[0].dwOptions = DBPROPOPTIONS_REQUIRED;  
   InitProperties[0].colid = DB_NULLID;  
  
   InitProperties[1].dwPropertyID = DBPROP_AUTH_USERID;  
   InitProperties[1].vValue.vt = VT_BSTR;  
   // Modify the following line to add the user ID of a SQL Server Authentication account on your server  
   InitProperties[1].vValue.bstrVal = SysAllocString(L"");  
   InitProperties[1].dwOptions = DBPROPOPTIONS_REQUIRED;  
   InitProperties[1].colid = DB_NULLID;  
  
   InitProperties[2].dwPropertyID = DBPROP_AUTH_PASSWORD;  
   InitProperties[2].vValue.vt = VT_BSTR;  
   // Modify the following line to add the new SQL Server Authentication password  
   InitProperties[2].vValue.bstrVal = SysAllocString(L"");  
   InitProperties[2].dwOptions = DBPROPOPTIONS_REQUIRED;  
   InitProperties[2].colid = DB_NULLID;  
  
   InitProperties[3].dwPropertyID = DBPROP_INIT_DATASOURCE;  
   InitProperties[3].vValue.vt = VT_BSTR;  
   InitProperties[3].vValue.bstrVal = SysAllocString(L"(local)");  
   InitProperties[3].dwOptions = DBPROPOPTIONS_REQUIRED;  
   InitProperties[3].colid = DB_NULLID;  
  
   SSInitProperties[0].dwPropertyID = SSPROP_AUTH_OLD_PASSWORD;  
   SSInitProperties[0].vValue.vt = VT_BSTR;  
   // Modify the following line to specify the existing SQL Server Authentication password  
   SSInitProperties[0].vValue.bstrVal = SysAllocString(L"");  
   SSInitProperties[0].dwOptions = DBPROPOPTIONS_REQUIRED;  
   SSInitProperties[0].colid = DB_NULLID;  
  
   rgInitPropSet[0].guidPropertySet = DBPROPSET_DBINIT;  
   rgInitPropSet[0].cProperties = nInitProps;  
   rgInitPropSet[0].rgProperties = InitProperties;  
  
   rgInitPropSet[1].guidPropertySet = DBPROPSET_SQLSERVERDBINIT;  
   rgInitPropSet[1].cProperties = nSSInitProps;  
   rgInitPropSet[1].rgProperties = SSInitProperties;  
  
   // Set initialization properties.  
   hr = pIDBInitialize->QueryInterface( IID_IDBProperties, (void **)&pIDBProperties);  
  
   if (FAILED(hr))  
      printf("Failed to obtain IDBProperties interface.\n");  
  
   hr = pIDBProperties->SetProperties( nPropSet, rgInitPropSet);  
  
   if (FAILED(hr))  
      printf("Failed to set initialization properties.\n");  
  
   pIDBProperties->Release();  
  
   // establish connection to the data source.  
   DWORD now = GetTickCount();  
  
   if ( FAILED(pIDBInitialize->Initialize()) ) {  
      printf("Problem in initializing.\n");  
      DumpErrorInfo(pIDBInitialize, IID_IDBInitialize);  
   }  
  
   DWORD tookms = GetTickCount() - now;  
   printf("Connection took %d ms.\n", tookms);  
}  
  
// DumpErrorInfo queries SQLOLEDB error interfaces, retrieving available status  
// or error information. This version is called when SQL Server errors are not expected.  
void DumpErrorInfo (IUnknown* pObjectWithError, REFIID IID_InterfaceWithError) {  
   BOOL has_sql_errors;  
   DumpErrorInfo (pObjectWithError, IID_InterfaceWithError, has_sql_errors);  
}  
  
// DumpErrorInfo queries SQLOLEDB error interfaces, retrieving available status   
// or error information. This version is called when an SQL Server error could occur.  
void DumpErrorInfo (IUnknown* pObjectWithError, REFIID IID_InterfaceWithError, BOOL &has_sql_errors ) {  
   // Interfaces used in the example.  
   IErrorInfo * pIErrorInfoAll = NULL;  
   IErrorInfo * pIErrorInfoRecord = NULL;  
   IErrorRecords * pIErrorRecords = NULL;  
   ISupportErrorInfo * pISupportErrorInfo = NULL;  
   ISQLErrorInfo * pISQLErrorInfo = NULL;  
   ISQLServerErrorInfo * pISQLServerErrorInfo = NULL;  
  
   // Number of error records.  
   ULONG nRecs;  
   ULONG nRec;  
  
   // Basic error information from GetBasicErrorInfo.  
   ERRORINFO errorinfo;  
  
   // IErrorInfo values.  
   BSTR bstrDescription;  
   BSTR bstrSource;  
  
   // ISQLErrorInfo parameters.  
   BSTR bstrSQLSTATE;  
   LONG lNativeError;  
  
   // ISQLServerErrorInfo parameter pointers.  
   SSERRORINFO * pSSErrorInfo = NULL;  
   OLECHAR * pSSErrorStrings = NULL;  
  
   // Hard-code an English (United States) locale for the example.  
   DWORD MYLOCALEID = 0x0409;  
  
   has_sql_errors = 0;  
  
   // Only ask for error information if the interface supports it.  
   if (FAILED(pObjectWithError->QueryInterface(IID_ISupportErrorInfo, (void**) &pISupportErrorInfo)))     
      wprintf(L"SupportErrorErrorInfo interface not supported\n");  
   else if (FAILED(pISupportErrorInfo->InterfaceSupportsErrorInfo(IID_InterfaceWithError)))     
      wprintf(L"InterfaceWithError interface not supported\n");  
  
   // Do not test the return of GetErrorInfo. It can succeed and return  
   // a NULL pointer in pIErrorInfoAll. Simply test the pointer.  
   GetErrorInfo(0, &pIErrorInfoAll);  
  
   // Test to see if it's a valid OLE DB IErrorInfo interface exposing a list of records.  
   if (pIErrorInfoAll != NULL)  {  
      if (SUCCEEDED(pIErrorInfoAll->QueryInterface(IID_IErrorRecords, (void**) &pIErrorRecords))) {  
         pIErrorRecords->GetRecordCount(&nRecs);  
  
         // Within each record, retrieve information from each of the defined interfaces.  
         for (nRec = 0; nRec < nRecs; nRec++) {  
            ULONG errorno = nRecs - nRec - 1;  
            // From IErrorRecords, get the HRESULT and a reference to the ISQLErrorInfo interface.  
            pIErrorRecords->GetBasicErrorInfo(errorno, &errorinfo);  
            pIErrorRecords->GetCustomErrorObject(errorno,IID_ISQLErrorInfo, (IUnknown**) &pISQLErrorInfo);  
  
            // Display the HRESULT, then use the ISQLErrorInfo.  
            wprintf(L"HRESULT:\t%#X\n", errorinfo.hrError);  
  
            if (pISQLErrorInfo != NULL) {  
               pISQLErrorInfo->GetSQLInfo(&bstrSQLSTATE, &lNativeError);  
               // Display SQLSTATE and native error values.  
               wprintf(L"SQLSTATE:\t%s\nNative Error:\t%ld\n", bstrSQLSTATE, lNativeError);  
  
               // SysFree BSTR references.  
               SysFreeString(bstrSQLSTATE);  
  
               // Get the ISQLServerErrorInfo interface from  
               // ISQLErrorInfo before releasing the reference.  
               pISQLErrorInfo->QueryInterface(IID_ISQLServerErrorInfo, (void**) &pISQLServerErrorInfo);  
  
               pISQLErrorInfo->Release();  
            }  
  
            // Test to ensure the reference is valid, then get error information from ISQLServerErrorInfo.  
            if (pISQLServerErrorInfo != NULL) {  
               pISQLServerErrorInfo->GetErrorInfo(&pSSErrorInfo, &pSSErrorStrings);  
  
               // ISQLServerErrorInfo::GetErrorInfo succeeds even when it  
               // has nothing to return. Test the pointers before using.  
               if (pSSErrorInfo) {  
                  // Display the state and severity from the returned  
                  // information. The error message comes from  
                  // IErrorInfo::GetDescription.  
                  wprintf(L"Error state:\t%d\nSeverity:\t%d\n", pSSErrorInfo->bState, pSSErrorInfo->bClass);  
                  wprintf(L"Procedure:\t%s\nLine:\t%d\n", pSSErrorInfo->pwszProcedure, pSSErrorInfo->wLineNumber);  
  
                  has_sql_errors++;  
  
                  // IMalloc::Free needed to release references on returned values.  
                  pMalloc->Free(pSSErrorStrings);  
                  pMalloc->Free(pSSErrorInfo);  
               }  
  
               pISQLServerErrorInfo->Release();  
            }  
  
            if (SUCCEEDED(pIErrorRecords->GetErrorInfo(errno, MYLOCALEID, &pIErrorInfoRecord))) {  
               // Get the source and description (error message) from the record's IErrorInfo.  
               pIErrorInfoRecord->GetSource(&bstrSource);  
               pIErrorInfoRecord->GetDescription(&bstrDescription);  
  
               if (bstrSource != NULL) {  
                  wprintf(L"Source:\t\t%s\n", bstrSource);  
                  SysFreeString(bstrSource);  
               }  
  
               if (bstrDescription != NULL) {  
                  wprintf(L"Error message:\t%s\n", bstrDescription);  
                  SysFreeString(bstrDescription);  
               }  
  
               pIErrorInfoRecord->Release();  
            }  
         }  
  
         pIErrorRecords->Release();  
      }  
      else {  
         // IErrorInfo is valid; get the source and  
         // description to see what it is.  
         pIErrorInfoAll->GetSource(&bstrSource);  
         pIErrorInfoAll->GetDescription(&bstrDescription);  
  
         if (bstrSource != NULL) {  
            wprintf(L"Source:\t\t%s\n", bstrSource);  
            SysFreeString(bstrSource);  
         }  
  
         if (bstrDescription != NULL) {  
            wprintf(L"Error message:\t%s\n", bstrDescription);  
            SysFreeString(bstrDescription);  
         }  
      }  
  
      pIErrorInfoAll->Release();  
   }  
   else  
      wprintf(L"GetErrorInfo failed.\n");  
  
   if (pISupportErrorInfo != NULL)  
      pISupportErrorInfo->Release();  
}