Mega Code Archive
How to retrieve the password of a protected access database
<![CDATA[
Title: How to retrieve the password of a protected access database ?
Question: The password of an access database can easily be retrieved using the function below
Answer:
I know there that there are many utilities out there costing $$ for removing the password of an access database. Here's how to implement it in Delphi.Please note that this method is not meant for a database with user-level security and work group information file. The idea is based on the file format of an access db.
The password is stored from location $42 and encrypted using simple xoring.The following function does decryption.
function GetPassword(filename: string): string;
var
Stream: TFilestream;
buffer: array[0..12] of char;
str: string;
begin
try
stream := TFileStream.Create(filename, fmOpenRead);
except
ShowMessage('Could not open the file.Make sure that the file is not in use.');
exit;
end;
stream.Seek($42, soFromBeginning);
stream.Read(buffer, 13);
stream.Destroy;
str := chr(Ord(buffer[0]) xor $86);
str := str + chr(Ord(buffer[1]) xor $FB);
str := str + chr(Ord(buffer[2]) xor $EC);
str := str + chr(Ord(buffer[3]) xor $37);
str := str + chr(Ord(buffer[4]) xor $5d);
str := str + chr(Ord(buffer[5]) xor $44);
str := str + chr(Ord(buffer[6]) xor $9c);
str := str + chr(Ord(buffer[7]) xor $fa);
str := str + chr(Ord(buffer[8]) xor $c6);
str := str + chr(Ord(buffer[9]) xor $5e);
str := str + chr(Ord(buffer[10]) xor $28);
str := str + chr(Ord(buffer[11]) xor $e6);
str := str + chr(Ord(buffer[12]) xor $13);
Result := str;
end;
]]>