Hi,
In order to strengthen the security of the software I am developing, I require being able to uniquely identify the computers of each license holder. I have decide to generate a GUID for each user to do this. However, I am running into some trouble and I was wondering if someone could assist me in the code that is required to generate a GUID string that remains unchanged each time you generate the GUID.
I found the following code on another site:
; #################################################
.486
.model flat, stdcall
option casemap :none ; case sensitive
; #################################################
include \masm32\include\windows.inc
include \masm32\include\user32.inc
include \masm32\include\kernel32.inc
;include \masm32\include\gdi32.inc
include \masm32\include\ole32.inc
includelib \masm32\lib\user32.lib
includelib \masm32\lib\kernel32.lib
;includelib \masm32\lib\gdi32.lib
includelib \masm32\lib\ole32.lib
main PROTO
.data
AppTitle db "GUID String Example",0
.data?
GUIDptr dd ?
GUIDTextBufferW db 78 dup(?)
GUIDTextBufferA db 38 dup(?)
; #################################################
.code
start:
invoke CoInitializeEx,NULL,2
invoke CoCreateGuid,OFFSET GUIDptr
invoke StringFromGUID2,OFFSET GUIDptr,OFFSET GUIDTextBufferW, 78
invoke WideCharToMultiByte,CP_ACP, 0 ,OFFSET GUIDTextBufferW,\
38, OFFSET GUIDTextBufferA, MAX_PATH, NULL, NULL
invoke MessageBox,0,OFFSET GUIDTextBufferA,OFFSET AppTitle,MB_OK
invoke CoUninitialize
invoke ExitProcess,0
; #################################################
end start
It generates the type of GUID string that I am looking for, however the string generate differs each time the code is run which is something I do not want.
For example, I ran the code twice and got:
---------------------------
GUID String Example
---------------------------
{DBAF15AF-007B-0044-4200-410046003100}
---------------------------
OK
---------------------------
---------------------------
GUID String Example
---------------------------
{188F732A-007B-0031-3800-380046003700}
---------------------------
OK
---------------------------
Could anyone assist me with the code necessary to generate a GUID String that is unique for each user and which does not change every time you generate the string? (unless of course the user changed significant hardware in their computer that would warrant the GUID changing).
Thanks.