LDicomDS::VerifySignature

#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName 
L_VOID ExamineSignature(LDicomDS& DataSet, pDICOMELEMENT pSignatureItem) 
{ 
   L_TCHAR szMsg[1024] = TEXT(""); 
   // Verify the Digital Signature; if pSignatureItem is NULL, the function 
   // will verify all the Digital Signatures that exist in the Data Set 
   L_UINT16 uRet = DataSet.VerifySignature(pSignatureItem); 
   switch (uRet) 
   { 
      case DICOM_SUCCESS: 
      if (pSignatureItem) 
      { 
         ::MessageBox(NULL, 
         TEXT("The Digital Signature was verified."), 
         TEXT("Sample"), 
         MB_OK); 
      } 
      else 
      { 
         ::MessageBox(NULL, 
         TEXT("All Digital Signatures were verified (if there are any)."), 
         TEXT("Sample"), 
         MB_OK); 
         return; 
      } 
      break; 
      case DICOM_ERROR_INVALID_SIGNATURE: 
      if (pSignatureItem) 
      { 
         ::MessageBox(NULL, 
         TEXT("The Digital Signature is invalid."), 
         TEXT("Sample"), 
         MB_OK); 
      } 
      else 
      { 
         ::MessageBox(NULL, 
         TEXT("At least one Digital Signature is invalid."), 
         TEXT("Sample"), 
         MB_OK); 
      } 
      return; 
default: 
      wsprintf(szMsg, TEXT("An error occurred [Error: %hu]."), uRet); 
      ::MessageBox(NULL, szMsg, TEXT("Sample"), MB_OK); 
      return; 
   } 
   // The Digital Signature UID 
   L_TCHAR* pszSignatureUID; 
   pszSignatureUID = DataSet.GetSignatureUID(pSignatureItem); 
   if (pszSignatureUID) 
   { 
      wsprintf(szMsg, TEXT("Digital Signature UID: %s\n"), pszSignatureUID); 
   } 
   // The Digital Signature DateTime 
   pVALUEDATETIME pSignatureDateTime; 
   pSignatureDateTime = DataSet.GetSignatureDateTime(pSignatureItem); 
   if (pSignatureDateTime) 
   { 
      wsprintf(szMsg, TEXT("%sDigital Signature DateTime: %02hu%02hu%04hu %02hu:%02hu:%02hu.%06lu %c%04li\n"), 
      szMsg, 
      pSignatureDateTime->nMonth, 
      pSignatureDateTime->nDay, 
      pSignatureDateTime->nYear, 
      pSignatureDateTime->nHours, 
      pSignatureDateTime->nMinutes, 
      pSignatureDateTime->nSeconds, 
      pSignatureDateTime->nFractions, 
      (pSignatureDateTime->nOffset >= 0) ? '+' : '-', 
      pSignatureDateTime->nOffset); 
   } 
   // The MAC Calculation Transfer Syntax UID 
   L_TCHAR* pszMacTransferSyntax; 
   pszMacTransferSyntax = DataSet.GetMacTransferSyntax(pSignatureItem); 
   if (pszMacTransferSyntax) 
   { 
      wsprintf(szMsg, TEXT("%sMAC Calculation Transfer Syntax UID: %s\n"), 
      szMsg, 
      pszMacTransferSyntax); 
   } 
   // The MAC Algorithm 
   L_TCHAR* pszMacAlgorithm; 
   pszMacAlgorithm = DataSet.GetMacAlgorithm(pSignatureItem); 
   if (pszMacAlgorithm) 
   { 
      wsprintf(szMsg,TEXT( "%sMAC Algorithm: %s\n"), 
      szMsg, 
      pszMacAlgorithm); 
   } 
   // The Data Elements Signed 
   if (DataSet.GetSignedElementsCount(pSignatureItem) > 0) 
   { 
      lstrcat(szMsg, TEXT("Data Elements Signed: ")); 
      // We will display only one 
      pDICOMELEMENT pSignedElement; 
      pSignedElement = DataSet.GetSignedElement(pSignatureItem, 0); 
      if (pSignedElement) 
      { 
         wsprintf(szMsg, TEXT("%s(%04X,%04X),..."), 
         szMsg, 
         GETGROUP(pSignedElement->nTag), 
         GETELEMENT(pSignedElement->nTag)); 
      } 
      lstrcat(szMsg, TEXT("\n")); 
   } 
   lstrcat(szMsg, TEXT("\nDo you want to save the Certificate of Signer?")); 
   // Display the information we have about the Digital Signature 
   if (::MessageBox(NULL, szMsg, TEXT("Sample"), MB_YESNO) == IDYES) 
   { 
      // Save the Certificate of Signer 
      DataSet.SaveCertificate(pSignatureItem, MAKE_IMAGE_PATH(TEXT("CertOfSigner.cer"))); 
   } 
}