Re: Tweak UI - Password encryption and autologon
From: Ramesh, MS-MVP (ramesh_at_XOX.mvps.org)
Date: 08/31/05
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Date: Wed, 31 Aug 2005 12:07:13 +0530
It's stored in a protected area. So does the Userpasswords2 method.
Protecting the Automatic Logon Password:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/secauthn/security/protecting_the_automatic_logon_password.asp
-- Ramesh, Microsoft MVP Windows XP Shell/User http://windowsxp.mvps.org "Larry Williams" <LarryWilliams@discussions.microsoft.com> wrote in message news:9F2725D9-1559-43D2-8E0A-25A3247227A8@microsoft.com... > > Not with my version of Tweak 2.10.0.0. I even did a search from my > password > in the registry. > > Could it be you've set the registry password some other way? > > "Doug Knox MS-MVP" wrote: > >> TweakUI does store the password in the Registry, un-encrypted. >> >> HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon >> >> DefaultPassword >> >> -- >> Doug Knox, MS-MVP Windows Media Center\Windows Powered Smart >> Display\Security >> Win 95/98/Me/XP Tweaks and Fixes >> http://www.dougknox.com >> -------------------------------- >> Per user Group Policy Restrictions for XP Home and XP Pro >> http://www.dougknox.com/xp/utils/xp_securityconsole.htm >> -------------------------------- >> Please reply only to the newsgroup so all may benefit. >> Unsolicited e-mail is not answered. >> >> "Larry Williams" <LarryWilliams@discussions.microsoft.com> wrote in >> message news:2B5A2991-888F-4243-B69E-9F86B7132290@microsoft.com... >> > Okay. Thanks. >> > >> > I was hoping the Tweak stored your password in the registry but I >> > wasn't >> > able to find it. >> > >> > I read chapter 15 of the MS XP Registry Guide and plan on seting this >> > up >> > just before the restart and including an entry for the "AutoLogonCount" >> > of 1 >> > so the information is automatically removed after the restart. >> > >> > "Doug Knox MS-MVP" wrote: >> > >> >> You can't. The autologon feature expects to see a plaintext password. >> >> You're only option would be to write a custom GINA DLL for >> >> authentication that would know how to decrypt the stored password. >> >> >> >> -- >> >> Doug Knox, MS-MVP Windows Media Center\Windows Powered Smart >> >> Display\Security >> >> Win 95/98/Me/XP Tweaks and Fixes >> >> http://www.dougknox.com >> >> -------------------------------- >> >> Per user Group Policy Restrictions for XP Home and XP Pro >> >> http://www.dougknox.com/xp/utils/xp_securityconsole.htm >> >> -------------------------------- >> >> Please reply only to the newsgroup so all may benefit. >> >> Unsolicited e-mail is not answered. >> >> >> >> "Larry Williams" <LarryWilliams@discussions.microsoft.com> wrote in >> >> message news:84365F2D-EEF9-409F-85D4-B2813F7F4C6B@microsoft.com... >> >> > I'm writing a program that will accept a userid and password to do >> >> > an >> >> > autologon after a restart using the following registry entries: >> >> > >> >> > HKEY_LOCAL_MACHINE\Software\Microsoft\Windows >> >> > NT\CurrentVersion\Winlogon >> >> > >> >> > DefaultUserName "your_username" >> >> > DefaultPassword "your_password" >> >> > AutoAdminLogon "1" >> >> > >> >> > However, if for some reason my program doesn't run properly and >> >> > remove the >> >> > userid/password when it's finished then I want to ensure that the >> >> > password >> >> > can't just be read from the registry. Therefore I need to know how >> >> > to do the >> >> > same thing that Tweak UI does and store an encrypted version of the >> >> > password. >> >> > >> >> > Any ideas? >> >> >>
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