[Yanel-dev] Auto Login

[basZero]

Hi Michael,

another requirement that must be considered is this here:
- most web applications perform some business logic at the Login Process.
That business logic must also be performed when somebody gets logged in
automatically.

So I think we need an API extension in Yanel which provides the following
mechanism:
- Per realm you can register (configure) your own class which gets called by
the YanelServlet (that class would implement a new interface). Methods of
that new interface would be:
a) doLoginLogic()
b) ... ?

If the YanelServlet recognizes the cookie and successfully authenticated the
user (logged in), the doLoginLogic() method gets called.
Otherwise, if no cookie is available, the request goes through as today.

What do you think?

Cheers
Balz

On Mon, May 16, 2011 at 5:06 PM, basZero <baszero at gmail.com> wrote:

> Hi Michael,
>
> as just discussed, what I meant by "auto-login" is not just pre-filling the
> username field in the login form.
> By "auto-login", I mean the following:
>
> - the user accesses ANY page within my realm
> - at every request it is verified whether the user is logged in (means:
> getIdentity() != null ?)
> - if there is no identity available, the request is checked for the
> autologin cookie
> - if there is no autologin cookie, proceed as usual (= user remains
> anonymous)
> - if there IS an autologin cookie, the user gets authenticated
> automatically (without seeing any form or the need of pressing a submit
> button) and the user is logged in.
>
> *Implementation:*
> The standard way of how this usually gets implemented is as follows:
> - The cookie contains USERID, TOKEN
> - After every successful authentication, a new TOKEN gets created and
> stored in the COOKIE (for the next time). The realm also stores the new
> token for this user (so that it can be verified the next time).
> - How to do the authentication: the token from the cookie must match the
> last stored token for this user. if it matches, the user gets logged in
> without the need of the password.
>
> A normal side effect of this implementation is:
> - if the user uses a web browser and for instance an iPad, every time he
> switches the device, the token obviously does not match anymore and he has
> to login by the usual login form where he enters username and password (and
> where he can checkbox the autologin feature again).
>
> *Next steps for Yanel:*
> It would be great if this functionality could be plugged into the request
> pipeline of Yanel.
> An alternative is to write a Request Pipeline Filter for TOMCAT so that the
> request goes through that servlet each time.
>
> What do you propose?
>
> Cheers
> Balz
>
>
> On Mon, May 16, 2011 at 4:48 PM, Michael Wechner <
> michael.wechner at wyona.com> wrote:
>
>> Hi Balz
>>
>>
>> On 5/16/11 4:09 PM, basZero wrote:
>>
>>> Hi Michael,
>>>
>>> you once mentioned that Yanel comes out of the box with an auto login
>>> feature?
>>> Can you point me to the source code? I didn't find it.
>>>
>>
>> Have a look at
>>
>>
>> src/webapp/src/java/org/wyona/yanel/servlet/security/impl/DefaultWebAuthenticatorImpl.java
>>
>> and search for
>>
>> remember-my-login-name
>>
>> (also see rememberLoginNameCookie.setMaxAge(86400); // 1 day is 86400
>> seconds)
>>
>> (also see src/webapp/xslt/login-screen.xsl)
>>
>> HTH
>>
>> Michael
>>
>>
>>> I just want to see how it is done.
>>>
>>> Cheers
>>> Balz
>>>
>>
>> --
>> Yanel-development mailing list Yanel-development at wyona.com
>> http://lists.wyona.org/cgi-bin/mailman/listinfo/yanel-development
>>
>
>
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