libu2f-server - Yubico Universal 2nd Factor (U2F) Server Tool

       libu2f-server 1.0.2

       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)

       -x, --x509cert=STRING
              A file to write the registration attestation certificate to

       libu2f-server - Yubico Universal 2nd Factor (U2F) Server Tool

       Report bugs at <https://github.com/Yubico/libu2f-server>.

libu2f-server 1.0.2                               January 2018                                  LIBU2F-SERVER(1)

libu2f-server [OPTIONS]...