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virtual-fido's Introduction

Virtual FIDO

Note: Virtual FIDO is currently in beta, so it should not yet be used for security-critical products.

Virtual FIDO is a virtual USB device that implements the FIDO2/U2F protocol (like a YubiKey) to support 2FA and WebAuthN.

Features

  • Support for both Windows and Linux through USB/IP (Mac support coming later)
  • Connect using both U2F and FIDO2 protocols for both normal 2FA and WebAuthN
  • Store credentials in an encrypted format with a passphrase
  • Store credential data anywhere (example provided: a local file)
  • Generic approval mechanism for credential creation and login (example provided: terminal-based)

How it works

Virtual FIDO creates a USB/IP server over local TCP to attach a virtual USB device. This USB device then emulates the USB/CTAP protocols to provide U2F/FIDO services to the host computer. In the demo, credentials created by the virtual device are stored in a local file, and approvals are done using the terminal.

Demo Usage

Go to the YubiKey test page in order to test WebAuthN.

Windows

Run go run main.go start to attach the USB device. Run go run main.go --help to see more commands, such as to list or delete credentials from the file.

Linux

Note that this tool requires elevated permissions.

  1. Run sudo modprobe vhci-hcd to load the necessary drivers.
  2. Run sudo go run main.go start to start up the USB device server. Authenticate when sudo prompts you; this is necessary to attach the device.

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