Project	Description
AuthPkgTester	Tool for testing custom authentication packages.
BluetoothSubauthPkg	Sample MSV1_0 subauthentication package that will deny logon if Bluetooth is enabled.
CredUITester	Tool for testing CredUI-based authentication
NoPasswordAuthPkg	Sample authentication package to allow interactive logon without having to type the password.
ReversePassword	Sample Windows Credential Provider that require the password to by typed backwards. Written in C#.

How to test

It's recommended to test in a disposable Virtual Machine (VM), since credential provider problems might break the windows logon screen. You don't want to risk that on your main computer.

Build steps

• Open solution in Visual Studio and build the projects in release or debug mode.

Installation steps

• Install .NET 8 Desktop Runtime

• Copy the build artifacts to the test environment.

• Run REGISTER_ReversePassword.bat as administrator.

• Log screen, log out or restart the computer.

• Observe that there's now a new "RP" sign-in option that requires the password to be typed backwards:
  

• CredUITester.exe can also be used for testing the credential provider:
  

Password entering can be avoided altogether if NoPasswordAuthPkg is also installed. This can be done by running Install_NoPasswordAuthPkg.ps1 as administrator and restarting afterwards.

Uninstallation steps

• Right click on UNREGISTER_ReversePassword.bat and select "Run as administrator".

Authentication and logon documentation

User session and authentication

• Show authentication dialog: CredUIPromptForWindowsCredentials
• Logoff, shutdown or restart: ExitWindowsEx with EWX_LOGOFF, EWX_POWEROFF or EWX_REBOOT parameter.
• Lock desktop: LockWorkStation (same as Ctrl+Alt+Del and click "Lock")
• Authenticate to impersonate a user: LogonUserW

Credential provider

• Credential providers in Windows
• Credential Provider driven Windows Logon Experience (converted https://go.microsoft.com/fwlink/?LinkId=717287 from XPS to PDF)
• Windows-classic-samples CredentialProvider
• Win7Samples credentialproviders

Security and authentication packages

• LSA Authentication Model
• Creating Custom Security Packages
• MSV1_0 Authentication Package is used for local machine logons (Kerberos is used for network logons).