Gokhan,

Are you ask how to reuse a ST or are you asking how to prevent someone
reusing a ST?

I will answer the second. ST lifetime is short (10 seconds by default, I
think). Once a ST has been submitted to CAS for validation (step 4
below) or ticket lifetime has passed, CAS will mark the ST as expired
and it can no longer be used.

Ray

On 2017-01-05 04:14, Gokhan Mansuroglu wrote:
> Hi,
>
> I have an additional requirement for Cas protocol. I will simplify the
> protocol just to explain my case;
>
> 1. Client tries to access /https://app.example.com/
> ||2. Browser redirected to
> /https://cas.example.com/cas/login?service=https://app.example.com/
> 3. User authenticates with username and password and redirected to
> /https://app.examle.com?*ticket=ST-xxx*/
> 4. The app send a validation request and gets the authentication
> information.
>
> Lets say you want to be able to use the service ticket multiple times.
> Then whoever has the link */https://app.examle.com?ticket=ST-xxx/* can
> successfully log in the application which results in very risky situation.
>
> What is your solution to this problem ?
>
> Thank you very much.
>
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-- 
Ray Bon
Programmer Analyst
Development Services, University Systems
2507218831 | CLE C023 | [email protected]

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