[Wien] How to know the user id & password for graphical interface of wien2k

[Gavin Abo]

The id seems recoverable from the w2web.users file.  However, the 
password seems not easily recoverable (as it should be!) as the perl 
documentation says "There is no decrypt function" [1].  Therefore, 
deleting w2web.users [2] (or .w2web) is the way to do it.

First, you might want to backup the .w2web folder.  For example:

username at computername:~/Desktop$ cp -r ~/.w2web ~/.w2web_old

Or at least, you will probably want to get and write down what the port 
and host that are in the w2web.conf file before removing the .w2web folder:

username at computername:~/Desktop$ cat 
~/.w2web/computername/conf/w2web.conf | grep -E 'port|host'
port=7890
host=localhost

Next, remember to kill all currently running versions of w2web. For example:

username at computername:~/Desktop$ ps -e | grep w2web
  4089 ?        00:00:00 w2web
username at computername:~/Desktop$ kill 4089

For example, my username is user1 and password is 1234.  The username is 
clearly seen in w2web.users and 9XDKy48uHtMo6 is the hash for my 1234 
password:

username at computername:~/Desktop$ cat ~/.w2web/computername/conf/w2web.users
user1:9XDKy48uHtMo6

Just the w2web.users file was removed. For example with:

username at computername:~/Desktop$ rm ~/.w2web/computername/conf/w2web.users

Next, I was able set a new id and password, but I used the same ones 
again.  I also used the port and host that I had before in the 
w2web.conf file:

username at computername:~/Desktop$ w2web
#######################################################################
# w2web starter                                                       #
# Copyright (C) 2001 luitz.at                                         #
#######################################################################
w2web installer on host computername

#######################################################################
# w2web installer                                                     #
# Copyright (C) 2001 luitz.at                                         #
#######################################################################

Checking for Installation in /home/username/.w2web/computername


Installing w2web files ...
Please answer these questions for proper installaltion.
Just press enter for the default value of (in brackets).

Please enter the username: [admin] user1
Please enter the password: [password] 1234
user1:1234
Remember these. You will need them when you log in.

Select the port to run on: [7890]
Running on port 7890

Please enter this system's hostname: [computername] localhost
Using localhost

Is this your master node?: [y] y
Installing... Attempting to start now...

Trying to start /home/username/WIEN2k/SRC_w2web/bin/w2web
w2web server started, now point your web browser to
http://localhost:7890

done.
username at computername:~/Desktop$ cat ~/.w2web/computername/conf/w2web.users
user1:ttja7f2i1Z72.

The ttja7f2i1Z72 is the hash for my 1234 password.  The password hash is 
randomly generate each time, which is why it is different.

[1] http://perldoc.perl.org/functions/crypt.html
[2] http://susi.theochem.tuwien.ac.at/reg_user/textbooks/usersguide.pdf 
(section "11.3.5 The password file conf/w2web.users" on page 224 of the 
WIEN2k 16.1 usersguide)

On 4/1/2017 1:09 AM, shamik chakrabarti wrote:
> Dear Xavier,
>
>                if without deleting the .w2web file, if I run 
> ./userconfig_lapw, whether that will give me new id & password for 
> graphical interface?...As the installation of wien2k itself is a tough 
> job, I do not want to take risk of deleting any files, as long as we 
> have other ways to do it.
>
> with regards,
>
> On Sat, Apr 1, 2017 at 12:11 AM, Xavier Rocquefelte 
> <xavier.rocquefelte at univ-rennes1.fr 
> <mailto:xavier.rocquefelte at univ-rennes1.fr>> wrote:
>
>     Dear Shamik
>
>     The userid and password are generated when you start for the first
>     time the w2web interface by typing in the unix terminal:
>
>     w2web
>
>     If it has been already generated, you have then created a
>     directory named .w2web which contains configuration files.
>
>     One easy solution is to remove this directory: rm -f .w2web
>
>     Then type: w2web and answer the questions which will lead to
>     recreate the directory with the userid and password you will choose.
>
>     Best Regards
>
>     Xavier
>
>
>     Le 31/03/2017 à 18:29, shamik chakrabarti a écrit :
>>     Dear Wien2k users,
>>
>>                               I am now try to work in a system, in
>>     which while giving the port number to the address bar of a
>>     browser & it is then asking for user id & password to open
>>     graphical interface of wien2k. Unfortunately I do not know the id
>>     & the password for the interface to open. Is there any file or
>>     directory in which I can get the log in information for graphical
>>     interface.
>>
>>     Looking forward to your response in this regard.
>>
>>     with regards,
>>
>>     -- 
>>     Dr. Shamik Chakrabarti
>>     Research Associate
>>     Electroceramics Lab
>>     Dept. of Metallurgical & Materials Engineering
>>     IIT Kharagpur
>>     Kharagpur 721302
>>     INDIA
>
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