Windows product key algorithm (Delphi)

Http://www.swissdelphicenter.ch/en/showcode.php? Id = 2252

Another tool, refer to: http://www.ac2tech.com/tools/keyviewer/keyviewer.php

This is what you see when you double click on"Digitalproductid"Located under"HKEY_LOCAL_MACHINE/software/
Microsoft/Windows NT/CurrentVersion".

I am using XP Pro. For Windows 9xor MS office, it is in a different location.
Raw key is offset by 34 byte, the length of the key is 15 byte. type this key ("7f6a514c8e5a9156ea34771ab7f202") in the edit box of the raw key tab, click decode, and you will see "RRQ4Y-TV33X-D484J-V7843-HHHVK" as the product key.

 

UnitMsprodkey;

{
**************************************** **************************************** ******
* Unit msprodkey v2.2 *
**
* Description: decode and view the product key, product ID and product name used *
* Install: Windows 2000, XP, Server 2003, Office XP, 2003 .*
** Updated * now works for users with non-administrative rights .*
* Code cleanup and changes, commented .*
**
* Usage: Add msprodkey to your application's uses clause .*
**
* Example 1 :*
**
* Procedure tform1.button1click (Sender: tobject );*
* Begin *
* If not is_winvermin2k then // If the Windows version isn' t at least Windows 2000 *
* Edit1.text: = 'windows 2000 or higher required! '// Display this message *
* Else // If the Windows version is at least Windows 2000 *
* Edit1.text: = view_win_key; // view the Windows product key *
* Label1.caption: = pN; // view the Windows product name *
* Label2.caption: = PID; // view the Windows product ID *
* End ;*
**
* Example 2 :*
* Procedure tform1.button2click (Sender: tobject );*
* Begin *
* If not is_oxp_installed then // If Office XP isn' t installed *
* Edit1.text: = 'Office XP required! '// Display this message *
* Else // If Office XP is installed *
* Edit1.text: = view_oxp_key; // view the Office XP product key *
* Label1.caption: = DN; // view the Office XP product name *
* Label2.caption: = PID; // view the Office XP product ID *
* End ;*
**
* Example 3 :*
* Procedure tform1.button3click (Sender: tobject );*
* Begin *
* If not is_o2k3_installed then // If Office 2003 isn' t installed *
* Edit1.text: = 'Office 2003 required! '// Display this message *
* Else // If Office 2003 is installed *
* Edit1.text: = view_o2k3_key; // view the Office 2003 productkey *
* Label1.caption: = DN; // view the Office 2003 product name *
* Label2.caption: = PID; // view the Office 2003 productid *
* End ;*
**
**************************************** **************************************** ******
}

Interface

UsesRegistry, windows, sysutils, classes;

FunctionIs_winvermin2k: Boolean;// Check OS for Win 2000 or higher
FunctionView_win_key:String;// View the Windows product key
FunctionIs_oxp_installed: Boolean;// Check if Office XP is installed
FunctionView_oxp_key:String;// View the Office XP Product Key
FunctionIs_o2k3_installed: Boolean;// Check if Office 2003 is installed
FunctionView_o2k3_key:String;// View the Office 2003 Product Key
FunctionDecodeproductkey (ConstHexsrc:ArrayByte ):String;
// Decodes the product key (s) from the Registry

VaR
Reg: Tregistry;
Binarysize: integer;
Hexbuf:ArrayByte;
Temp: tstringlist;
Keyname, keyname2, subkeyname, Pn, PID, DN:String;

Implementation

FunctionIs_winvermin2k: Boolean;
VaR
OS: tosversioninfo;
Begin
Zeromemory (@ OS, sizeof (OS ));
OS. dwosversioninfosize: = sizeof (OS );
Getversionex (OS );
Result: = (OS. dwmajorversion> = 5)And
(OS. dwplatformid = ver_platform_win32_nt );
Pn: = '';// Holds the Windows product name
PID: = '';// Holds the Windows product ID
End;

FunctionView_win_key:String;
Begin
Reg: = Tregistry. Create;
Try
Reg. rootkey: = HKEY_LOCAL_MACHINE;
IfReg. openkeyreadonly ('/software/Microsoft/Windows NT/currentversion ')Then
Begin
IfReg. getdatatype ('digitalproductid') = rdbinaryThen
Begin
Pn: = (Reg. readstring ('productname '));
PID: = (Reg. readstring ('produd D '));
Binarysize: = reg. getdatasize ('digitalproductid ');
Setlength (hexbuf, binarysize );
IfBinarysize> 0Then
Begin
Reg. readbinarydata ('digitalproductid', hexbuf [0], binarysize );
End;
End;
End;
Finally
Freeandnil (REG );
End;

Result: = '';
Result: = decodeproductkey (hexbuf );
End;

FunctionIs_oxp_installed: Boolean;
VaR
Reg: Tregistry;
Begin
Reg: = Tregistry. Create;
Try
Reg. rootkey: = HKEY_LOCAL_MACHINE;
Result: = reg. keyexists ('Software/Microsoft/office/10.0/registration ');
Finally
Reg. closekey;
Reg. Free;
End;
DN: = '';// Holds the Office XP product display name
PID: = '';// Holds the Office XP product ID
End;

FunctionView_oxp_key:String;
Begin
Try
Reg: = Tregistry. Create;
Reg. rootkey: = HKEY_LOCAL_MACHINE;
Keyname: = 'Software/Microsoft/office/10.0/registration /';
Reg. openkeyreadonly (keyname );
Temp: = tstringlist. Create;
Reg. getkeynames (temp );// Enumerate and hold the Office XP product (s) key name (s)
Reg. closekey;
Subkeyname: = temp. Strings [0];// Hold the first Office XP product key name
Reg: = Tregistry. Create;
Reg. rootkey: = HKEY_LOCAL_MACHINE;
Keyname2: = 'Software/Microsoft/Windows/CurrentVersion/uninstall /';
Reg. openkeyreadonly (keyname2 + subkeyname );
DN: = (Reg. readstring ('displayname '));
Reg. closekey;
Except
OnE: estringlisterrorDo
Exit
End;
Try
IfReg. openkeyreadonly (keyname + subkeyname)Then
Begin
IfReg. getdatatype ('digitalproductid') = rdbinaryThen
Begin
PID: = (Reg. readstring ('produd D '));
Binarysize: = reg. getdatasize ('digitalproductid ');
Setlength (hexbuf, binarysize );
IfBinarysize> 0Then
Begin
Reg. readbinarydata ('digitalproductid', hexbuf [0], binarysize );
End;
End;
End;
Finally
Freeandnil (REG );
End;

Result: = '';
Result: = decodeproductkey (hexbuf );
End;

FunctionIs_o2k3_installed: Boolean;
VaR
Reg: Tregistry;
Begin
Reg: = Tregistry. Create;
Try
Reg. rootkey: = HKEY_LOCAL_MACHINE;
Result: = reg. keyexists ('Software/Microsoft/office/11.0/registration ');
Finally
Reg. closekey;
Reg. Free;
End;
DN: = '';// Holds the Office 2003 product display name
PID: = '';// Holds the Office 2003 product ID
End;

FunctionView_o2k3_key:String;
Begin
Try
Reg: = Tregistry. Create;
Reg. rootkey: = HKEY_LOCAL_MACHINE;
Keyname: = 'Software/Microsoft/office/11.0/registration /';
Reg. openkeyreadonly (keyname );
Temp: = tstringlist. Create;
Reg. getkeynames (temp );
// Enumerate and hold the Office 2003 product (s) key name (s)
Reg. closekey;
Subkeyname: = temp. Strings [0];// Hold the first Office 2003 product key name
Reg: = Tregistry. Create;
Reg. rootkey: = HKEY_LOCAL_MACHINE;
Keyname2: = 'Software/Microsoft/Windows/CurrentVersion/uninstall /';
Reg. openkeyreadonly (keyname2 + subkeyname );
DN: = (Reg. readstring ('displayname '));
Reg. closekey;
Except
OnE: estringlisterrorDo
Exit
End;
Try
IfReg. openkeyreadonly (keyname + subkeyname)Then
Begin
IfReg. getdatatype ('digitalproductid') = rdbinaryThen
Begin
PID: = (Reg. readstring ('produd D '));
Binarysize: = reg. getdatasize ('digitalproductid ');
Setlength (hexbuf, binarysize );
IfBinarysize> 0Then
Begin
Reg. readbinarydata ('digitalproductid', hexbuf [0], binarysize );
End;
End;
End;
Finally
Freeandnil (REG );
End;

Result: = '';
Result: = decodeproductkey (hexbuf );
End;

FunctionDecodeproductkey (ConstHexsrc:ArrayByte ):String;
Const
Startoffset: integer = $34;{// Offset 34 = array [52]}
Endoffset: integer = $34 + 15;{// Offset 34 + 15 (bytes) = array [64]}
Digits:Array[0 .. 23]OfChar = ('B', 'C', 'D', 'F', 'G', 'h', 'J ',
'K', 'M', 'P', 'Q', 'R', 't', 'V', 'w', 'x', 'y ', '2', '3', '4', '6', '7', '8', '9 ');
Dlen: integer = 29;{// Length of decoded product key}
Slen: integer = 15;
{// Length of encoded product key in bytes (an total of 30 in chars )}
VaR
Hexdigitalpid:ArrayCardinal;
Des:ArrayChar;
I, n: integer;
HN, value: Cardinal;
Begin
Setlength (hexdigitalpid, dlen );
ForI: = startoffsetToEndoffsetDo
Begin
Hexdigitalpid [I-startoffset]: = hexsrc [I];
End;

Setlength (DES, dlen + 1 );

ForI: = dlen-1Downto0Do
Begin
If(I + 1)MoD6) = 0)Then
Begin
Des [I]: = '-';
End
Else
Begin
Hn: = 0;
ForN: = slen-1Downto0Do
Begin
Value: = (HNSHL8)OrHexdigitalpid [N];
Hexdigitalpid [N]: = ValueDiv24;
Hn: = ValueMoD24;
End;
Des [I]: = digits [HN];
End;
End;
Des [dlen]: = CHR (0 );

ForI: = 0ToLength (DES)Do
Begin
Result: = Result + des [I];
End;
End;

End.