u2f-server(1)

u2f-server1

Yubico universal 2nd factor (u2f) server tool

Usage

libu2f-server [OPTION] ...

Overview

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

Releases

6 releases since Debian 9 (Stretch); the text changed 2 times.

  1. 9
  2. 10–13
  3. Arch

--x509cert since Debian 10 (Buster); -x since Debian 10 (Buster).

Reporting bugs

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

From libu2f-server 1.1.0-7 in Arch Linux 2026-11-01. Parsed by carta from the page's man source.