I've asked this on the asp ng, but couldn't get any advice, wondering if
anyone here can help...
GOAL: place a .NET cookie, in a user's cookie folder, containing the
machinename of the current machine the user is on. Then various .NET apps
will be able to compare a value in our db, and see if the user is allowed to
work on that machine.
So far, in the computers' startup routine (when the computer is logged
into), each computer writes the text to the appropriately named cookie file,
in that user's cookie folder. We've gotten this far.
The problem - .NET can't read it. I believe it has to do with hidden
characters. ie, take a look at a .NET
cookie. After the second 'e' in ClientInfoCooki e, there is a hidden
character. You'll notice it by spacing over, it spaces twice at that point.
Also, after 'localhost/' there's a hidden character, and before the first
'*' there's a hidden character. But the Echo command that the network
engineer is running, strips out hidden characters. Could this be why we
can't read the cookie?
Anyone have any experience doing what I'm trying to do? An easier way
perpaps. Maybe I can use a javascript cookie, and have the machine name &
currentuser placed in there. Can .NET read a JS cookie perhaps...
TY Jason Shohet 12 4604
If you are trying to prevent users from using specific workstations, why not
use the built-in Windows policy mechanism? That's what it's designed for.
Colin
"Jason Shohet" <__******@yahoo .com> wrote in message
news:eX******** ******@tk2msftn gp13.phx.gbl... I've asked this on the asp ng, but couldn't get any advice, wondering if anyone here can help...
GOAL: place a .NET cookie, in a user's cookie folder, containing the machinename of the current machine the user is on. Then various .NET apps will be able to compare a value in our db, and see if the user is allowed
to work on that machine.
So far, in the computers' startup routine (when the computer is logged into), each computer writes the text to the appropriately named cookie
file, in that user's cookie folder. We've gotten this far. The problem - .NET can't read it. I believe it has to do with hidden characters. ie, take a look at a .NET cookie. After the second 'e' in ClientInfoCooki e, there is a hidden character. You'll notice it by spacing over, it spaces twice at that
point. Also, after 'localhost/' there's a hidden character, and before the first '*' there's a hidden character. But the Echo command that the network engineer is running, strips out hidden characters. Could this be why we can't read the cookie?
Anyone have any experience doing what I'm trying to do? An easier way perpaps. Maybe I can use a javascript cookie, and have the machine name & currentuser placed in there. Can .NET read a JS cookie perhaps...
TY Jason Shohet
Jason,
The correct way to get cookie and set cookie is use InternetSetCook ie
function and InternetSetCook ie function. If there is no expiry set for
cookie , cookie will become process level and if there is cookie will
stay in users cookie folder.
You need to use interop to call those Wininet functions.
[DllImport("wini net.dll", CharSet=CharSet .Auto, SetLastError=tr ue)]
public static extern bool InternetGetCook ie(
string lpszUrlName,
string lpszCookieName,
StringBuilder lpszCookieData,
[MarshalAs(Unman agedType.U4)]
ref int lpdwSize
);
[DllImport("wini net.dll", CharSet=CharSet .Auto, SetLastError=tr ue)]
public static extern bool InternetSetCook ie(
string lpszUrlName,
string lpszCookieName,
string lpszCookieData
);
Sample code to set a cookie ( persistant)
InternetSetCook ie(url,"Nirmal" ,"aaa;expire s = Sat, 01-Jan-2000
00:00:00 ");
I am not sure if this is what you want to acheive, Post if you need
more help.
Cheers
Nirmal
"Jason Shohet" <__******@yahoo .com> wrote in message news:<eX******* *******@tk2msft ngp13.phx.gbl>. .. I've asked this on the asp ng, but couldn't get any advice, wondering if anyone here can help...
GOAL: place a .NET cookie, in a user's cookie folder, containing the machinename of the current machine the user is on. Then various .NET apps will be able to compare a value in our db, and see if the user is allowed to work on that machine.
So far, in the computers' startup routine (when the computer is logged into), each computer writes the text to the appropriately named cookie file, in that user's cookie folder. We've gotten this far. The problem - .NET can't read it. I believe it has to do with hidden characters. ie, take a look at a .NET cookie. After the second 'e' in ClientInfoCooki e, there is a hidden character. You'll notice it by spacing over, it spaces twice at that point. Also, after 'localhost/' there's a hidden character, and before the first '*' there's a hidden character. But the Echo command that the network engineer is running, strips out hidden characters. Could this be why we can't read the cookie?
Anyone have any experience doing what I'm trying to do? An easier way perpaps. Maybe I can use a javascript cookie, and have the machine name & currentuser placed in there. Can .NET read a JS cookie perhaps...
TY Jason Shohet
So you're talking about the startup routine when Windows loads up, it can
call Wininet functions? I've never seem what you're showing me below, but
I'm going to check if our guys can do it!!! Are you saying that
InternetSetCook ie ( ) can be called during the startup routine -- its not
DOS commands (like Echo etc) from a .Bat file is it? TY very much!!!
The network engineers refuse to turn on Netbios, and I believe thats
required to go after Active Directory (we're a total AD shop, everyone's got
windows 2000 etc).
hi. I'm digesting this now. What is the 'URL' parameter? What goes in
there.
Also, if I logon to the machine as shohetj, is that what goes into the
CookieName parameter?
my thinking is it goes like this:
InternetSetCook ie(url, "shohetj", "w2k-shohetj; expires = Sat, 01-Jan-2000
00:00:00");
Where shohetj is the cookiename, w2k-shohetj is my computer's machinename,
and url -- i have no idea! :)
TY for the help
Are you trying to prevent users from using any application on specific
machines, or just some specific browser-based applications from specific
machines? Maybe if you express your goal in terms of the actual goal,
instead of a solution you'll get a better solution. It seems to me that what
you should be doing is securing the individual workstations using the
existing mechanisms rather than trying to roll your own security solution.
Colin
"Jason Shohet" <__******@yahoo .com> wrote in message
news:e4******** ******@TK2MSFTN GP09.phx.gbl... The network engineers refuse to turn on Netbios, and I believe thats required to go after Active Directory (we're a total AD shop, everyone's
got windows 2000 etc).
url is the url to which you need to set cookie. Cookies are generally
assigned against a domian and optionally path.
For eg, if you want to assign cookies which needs to be sent for http://www.test.com
url = "http://www.test.com"
"Jason Shohet" <__******@yahoo .com> wrote in message news:<#o******* *******@TK2MSFT NGP11.phx.gbl>. .. hi. I'm digesting this now. What is the 'URL' parameter? What goes in there. Also, if I logon to the machine as shohetj, is that what goes into the CookieName parameter?
my thinking is it goes like this:
InternetSetCook ie(url, "shohetj", "w2k-shohetj; expires = Sat, 01-Jan-2000 00:00:00");
Where shohetj is the cookiename, w2k-shohetj is my computer's machinename, and url -- i have no idea! :) TY for the help
Though i am explaining you the way to set cookies, it will be much
better if you post your actual problem here as suggested already in
this thread...
Colin, NK,
Thank you for helping me muddle thru this. YES, I am trying to prevent
users from accessing 1 particular applicationm -- a Timekeeping ASP.NET
application, on any machine -- besides their own.
ie: Joe has permission to access his Timesheet from his workstation only.
Mary from her workstation only.
Tactic 1: we keep the workstation assigned to each user in our database.
So I know Joe can log onto Machine abc. Mary on def, lets say. A cookie
containing the machinename, is written everytime someone logs on to a
machine. Lets say Joe logs onto Mary's machine. A cookie will go into
Joe's cookie directory on Mary's machine and write def. When he attempts
to access the asp.net timesheet app, the app reads from the cookie. It sees
def. The app looks in the db and sees abc assigned to Joe, and he is
refused entry into the system!
NOTE: we're not worried about someone modifying the cookie file because the
users are on the intranet, they don't have access to their hard drives etc.
Tactic 2: validate directly against ActiveDirectory (we're a w2k shop)!
Unfort, Netbios is not enabled on our network due to fears of extra network
traffic by the head network engineer. FWIK, Netbios is req'd for this to
work.
Thanks for the help again! Jason Shohet
"Colin Young" <x@nospam.com > wrote in message
news:uV******** ******@tk2msftn gp13.phx.gbl... Are you trying to prevent users from using any application on specific machines, or just some specific browser-based applications from specific machines? Maybe if you express your goal in terms of the actual goal, instead of a solution you'll get a better solution. It seems to me that
what you should be doing is securing the individual workstations using the existing mechanisms rather than trying to roll your own security solution.
Colin
"Jason Shohet" <__******@yahoo .com> wrote in message news:e4******** ******@TK2MSFTN GP09.phx.gbl... The network engineers refuse to turn on Netbios, and I believe thats required to go after Active Directory (we're a total AD shop, everyone's got windows 2000 etc).
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