This is the command u2f-server that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
libu2f-server - Yubico Universal 2nd Factor (U2F) Server Tool
SYNOPSIS
libu2f-server [OPTIONS]...
DESCRIPTION
libu2f-server 1.0.1
Perform U2F server-side operations on the command line. Writes challenge to standard
output and read responses from standard input.
-h, --help
Print help and exit
-V, --version
Print version and exit
-o, --origin=STRING
Origin URL to use.
-i, --appid=STRING
Application ID to use.
-c, --challenge=STRING
Challenge (Base64-URL encoded) string to use.
-a, --action=ENUM
Action to take. (possible values="register", "authenticate")
-k, --key-handle=STRING
A file containing a key-handle
-p, --user-key=STRING
A file containing the public user-key
-d, --debug
Print debug information to standard error (default=off)
REPORTING BUGS
Report bugs at <https://github.com/Yubico/libu2f-server>.
Use u2f-server online using onworks.net services
