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Extract Window Product Key - With an API !

, 21 Aug 2006
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Get a window's product key!

Introduction

Hi. This article shows a very usuful function!! This function gets a window's product key using the Windows API that can used with any window and can be used with any tool and language, VB, C++, VS6, VS 7, 8, and so on.

The code

BSTR GetProductKey()
/*
 Window Product Key Extract

*/
{
 CString strResult;        //Return a Window Product Key
  
 HKEY hRegistryKey;        //Registry Handler 
 BYTE   *DigitalProductID; //Digital Product Key Value 
 DWORD DataLength;         //Digital Product Key Length 

 BYTE ProductKeyExtract [15]; //Extract Key 

char sCDKey  [256];   //Temp, adding a Window Product Key
 
 long ByteCounter;    //Counter
 long ByteConvert;    //Convert

 int  nCur;      //XOR calculate 

 
 char *KeyChars[] = {
       "B","C","D","F","G","H","J","K","M",
       "P","Q","R","T","V","W","X","Y",
       "2","3","4","6","7","8","9",NULL
      }; 

 // HKLM\\SOFTWARE\\MICROSOFT\\Windows NT\\CurrentVersion 열기  
 if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, NT_CURRENT, 
    REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, 
    &hRegistryKey) == ERROR_SUCCESS)
 {
  
  DataLength = 164; 

  //Allocate Memory
  DigitalProductID = (BYTE *)malloc(DataLength);    

  //Memory Initializationd
  memset(DigitalProductID, 0, DataLength); 

 //Digital Product Key Open

  if(RegQueryValueEx(hRegistryKey, "DigitalProductId", 
   NULL, NULL, DigitalProductID, &DataLength) == ERROR_SUCCESS)
  {   
   //reading a value start position 52, by 66
   for(ByteCounter=52; ByteCounter<=66; ByteCounter++)
   {
    ProductKeyExtract[ByteCounter - 52] = 
             DigitalProductID[ByteCounter];
   }

   //Last Indexer
   ProductKeyExtract[sizeof(ProductKeyExtract)] = NULL;
  }
 } 

 //Start Converting job, Next Step 

 memset(sCDKey, 0, sizeof(sCDKey)); 

 for(ByteCounter=24; ByteCounter>=0; ByteCounter--)
 {
  nCur = 0; 

  for(ByteConvert=14; ByteConvert>=0; ByteConvert--)
  {
   

   nCur = (nCur * 256) ^ ProductKeyExtract[ByteConvert];  //XOR&#44228;&#49328; 
   ProductKeyExtract[ByteConvert] = nCur / 24;
   nCur = nCur % 24;
  }   
  
  strrev(sCDKey);
  strcat(sCDKey, KeyChars[nCur]);
  strrev(sCDKey);

  //Insert "-" 

  if(!(ByteCounter % 5) && (ByteCounter))
  {
   strrev(sCDKey);
   
   strcat(sCDKey, "-"); 
   
   strrev(sCDKey);
  }
 }

 //Insert Product Key into Return value 

 strResult.Format("%s", sCDKey); 

 //Close Registry
 RegCloseKey(hRegistryKey); 

 //Release Memory
 if(DigitalProductID) free(DigitalProductID); 

 return strResult.AllocSysString();
}

If you have any questions, mail them to me!

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

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About the Author

handsomeme
Architect
United States United States
Yeah, I'm programmer in SEOUL, Korea.

Comments and Discussions

 
QuestionCouple serious bugs in this Pinmemberpickaname26-Nov-13 12:20 
AnswerRe: Couple serious bugs in this Pinmemberhandsomeme8-Apr-14 3:01 
GeneralWork version is here [modified] Pinmemberdima_kdl30-Jan-09 8:03 
GeneralRe: Work version is here Pinmembertttony0725-Aug-09 18:36 
AnswerRe: Work version is here Pinmemberdanielsage6-Feb-11 12:07 
GeneralRe: Work version is here Pinmembertttony076-Feb-11 15:46 
GeneralC# & VB.NET Code Pinmembercrouchie19984-Apr-07 6:46 
GeneralNice code PinmemberDouglas R. Keesler6-Jan-07 21:15 
GeneralSmall bug Pinmembermcanti6-Jan-07 4:42 
GeneralRe: Small bug Pinmembersstraw17-Oct-07 13:21 
GeneralWindows Vista PinmemberGabriel Topala16-Sep-06 18:14 
GeneralRe: Windows Vista Pinmemberhandsomeme17-Sep-06 17:59 
GeneralRe: Windows Vista Pinmembertzukuei18-Oct-06 1:49 
GeneralRe: Windows Vista PinmemberGabriel Topala18-Oct-06 2:35 
GeneralRe: Windows Vista Pinmembertzukuei18-Oct-06 18:10 
GeneralRe: Windows Vista PinmemberGabriel Topala18-Oct-06 19:00 
GeneralRe: Windows Vista [modified] Pinmembertzukuei19-Oct-06 17:33 
GeneralRe: Windows Vista Pinmemberawjapp21-Apr-07 8:34 
GeneralSolo Pinmemberhvw22-Aug-06 20:13 
GeneralWow Good C# I like C# and used this! Pinmemberhandsomeme22-Aug-06 15:38 
Generalin c# Pinmembersolo22-Aug-06 7:17 
GeneralRe: in c#, not work! PinmemberBug Me Not7-Nov-09 2:56 

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