Looks like with RDP v6 protocol, user's credentials are stored in %userprofile% 
on local PC and not in .rdp file. Plus, password is encrypted using hash from 
user's Windows login password. This practically makes it impossible to generate 
.rdp file with username/password included. 

I found http://www.remkoweijnen.nl/blog/2007/10/17/launch-rdp-from-commandline/ 
utility, which works as a wrapper for mstsc.exe and can pass username/password 
and auto-connect to a RDP session. This is probably closest it gets to 

On Nov 22, 2011, at 16:37 , Aaron Coburn wrote:

> On Nov 22, 2011, at 2:58 PM, Alexander Kurt Keller wrote:
>> I believe years ago (RDP version 4?) the password could be defined in clear 
>> text within the RDP file but that is long unsupported. Here is a write-up 
>> and a lively comments discussion on the  MSTSC embedded password encryption 
>> function:
>> http://www.remkoweijnen.nl/blog/2007/10/18/how-rdp-passwords-are-encrypted/
>> it looks like they use the machine or user SID to salt the hash?
> I tried implementing this particular solution a while ago but was never able 
> to get it to work. The basic idea described in the website is that the target 
> machine needs to encrypt the password and that encrypted string goes into the 
> RDP file as:
> password 51:b:{encrypted password}
> For instance, if a suitable encryption program is installed on the VCL 
> Windows machine, the management node could, in theory, request a hashed copy 
> of the password before generating the RDP file for the user.
> I certainly don't want to dissuade anyone from trying to get this to work as 
> described in the link above, but given that there is no reference to 
> 'password 51' fields in the current Terminal Services documentation, I am not 
> entirely sure that the field is still supported: 
> http://technet.microsoft.com/en-us/library/ff393708%28WS.10%29.aspx
> http://support.microsoft.com/?kbid=885187
> The closest I have come to an auto-login solution is to use protocol handlers 
> in the form of a link. Something like this:
> <a href="rdp://username:password@hostname:port/domain?params">...</a>
> For this to work on a user's computer, the protocol handler must be 
> registered at the OS level, which introduces an additional level of 
> complexity. On Mac OS X, this is done automatically when a user installs an 
> RDP client such as CoRD. On linux, a user will need to execute something like 
> this to enable the handler:
> gconftool-2 -s /desktop/gnome/url-handlers/rdp/command '/usr/bin/rdesktop %s' 
> --type String
> gconftool-2 -s /desktop/gnome/url-handlers/rdp/enabled --type Boolean true
> I am not entirely sure about how to get this to work on Windows, though. 
> First of all, mstsc.exe doesn't seem to accept a username or password 
> argument from the command line. Nevertheless, if you want the protocol 
> handler to work on Windows, you'll need to modify the registry in 
> HKEY_CLASSES_ROOT\\rdp -- the documentation here will give you a start: 
> http://msdn.microsoft.com/en-us/library/aa767914.aspx
> Please let me know if you make any progress on this!
> Best regards,
> Aaron
> --
> Aaron Coburn
> Systems Administrator and Programmer
> Academic Technology Services, Amherst College
> (413) 542-5451 acob...@amherst.edu
>> -----Original Message-----
>> From: Josh Thompson [mailto:josh_thomp...@ncsu.edu] 
>> Sent: Tuesday, November 22, 2011 11:12 AM
>> To: vcl-user@incubator.apache.org
>> Subject: Re: rdp file auto login
>> It's been several years since I tried to get this to work.  However, unless 
>> things have changed (which I'm guessing they haven't), you can't make it 
>> auto- login.  The password is provided in a clear text form in the rdp file. 
>> Unfortunately, the windows and mac RDC apps won't use the clear text 
>> version.  
>> You can save a password in an encrypted form in an rdp file; however, RDC 
>> uses cryptographic stuff specific to the computer that actually saves the 
>> file, meaning there's no way to generate the encrypted form of the password 
>> unless you are actually on the end user's machine.
>> If anyone wants to try to investigate this again, I think everyone in the 
>> community would love to see it work.  Or, everyone can switch to linux/unix 
>> platforms that can use rdesktop that will happily accept the password at the 
>> command line.  :)  I have a nice wrapper script for rdesktop that will take 
>> the rdp file and do the auto-login into the remote windows node.
>> Josh
>> On Tue November 22 2011 1:29:09 PM Gene Lui wrote:
>>> Dmitri,
>>> If you download the rdp file from the connection reservation and open 
>>> it with a editor, you see that the rdp file has both a user name and 
>>> password within the setting file.  For example, the last rdp file had 
>>> the following key entries:
>>> username:s:gkl25
>>> clear password:s:LDgKQM
>>> I would have thought that this would be passed to the remote desktop 
>>> when opening this file with mstcs.  But it is not and I don't know if 
>>> this is how it normally works or is it suppose to be able to passed it 
>>> to the Win7 remote desktop and I'm doing something wrong.
>>> - Gene
>>> On Tue, 2011-11-22 at 13:17 -0500, Dmitri Chebotarov wrote:
>>>> Gene
>>>> I'm relatively new with VCL and I may be wrong. I could not find any 
>>>> options in preferences for RDP file to include password. Having 
>>>> password in RDP file would make it easier and if it's possible it would be 
>>>> great.
>>>> I would like to have this option as well and will be looking into 
>>>> the code which generates a RDP file for new reservations.
>>>> Thanks
>>>> On Nov 22, 2011, at 12:58 , Gene Lui wrote:
>>>>> Thanks Dmitri,
>>>>> Wanted to confirm if its possible by using the rdp file, users can 
>>>>> auto login with the mstsc (would be preferred over entering 
>>>>> password manually).  Thanks for such a quick reply and answer to my 
>>>>> question.
>>>>> Take care,
>>>>> Gene
>>>>> Drexel University
>>>>> On Tue, 2011-11-22 at 12:47 -0500, Dmitri Chebotarov wrote:
>>>>>> Gene,
>>>>>> Username/password would be on your reservation page.
>>>>>> Username is Admin, password is generated for each reservation and 
>>>>>> you need to type it manually when open RDP.
>>>>>> Thanks.
>>>>>> On Nov 22, 2011, at 12:32 , Gene Lui wrote:
>>>>>>> Hi there,
>>>>>>> I wonder if any of you bright individuals can help me out here 
>>>>>>> with this wonderful project you got here.
>>>>>>> When I use the RDP file supplied on the vcl connection page 
>>>>>>> (Windows
>>>>>>> 7 client) , I assume it will automatically supply the 
>>>>>>> credentials to log into the remote desktop image (Windows 7 
>>>>>>> image). The problem is that it does not automatically logs in 
>>>>>>> and it prompts for my password.
>>>>>>> Do I have this wrong and a password is needed to be manually entered?
>>>>>>> If not, how do I enable the auto login?  I have tried changing 
>>>>>>> group policy settings on the remote desktop host but nothing 
>>>>>>> works.  I appreciate any help anyone can give.
>>>>>>> Thanks,
>>>>>>> Gene
>>>>>>> Drexel University
>> -
>> -------------------------------
>> Josh Thompson
>> Systems Programmer
>> Virtual Computing Lab (VCL)
>> North Carolina State University
>> josh_thomp...@ncsu.edu
>> 919-515-5323
>> my GPG/PGP key can be found at www.keyserver.net

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