YubiKey C Client Library: libykclient
YubiKey C Client Library (libykclient) is a C library used to validate an Yubikey OTP against Yubico’s servers. See the Yubico website for more information about Yubico and the YubiKey.
After downloading and unpacking the package tarball, you build it as follows.
./configure make check sudo make install
Building from version controlled sources
Warning! This is only for developers and if you don’t understand what you are doing, you should download the release files instead.
You may check out the sources using Git with the following command:
git clone git://github.com/Yubico/yubico-c-client.git
This will create a directory 'yubico-c-client'. Enter the directory:
Recent versions of autoconf, automake and libtool must be installed. Help2man is used to generate the manpages. Libcurl development files (headers and *.so) must also be installed.
Generate the build system using:
Then refer to the user sections above regarding building.
There is one command line tool, ykclient, to validate a particular OTP. It needs a client id, which you can generate here.
jas@mocca:~/src/yubico-c-client$ ./ykclient Usage: ./ykclient <client_id> <yubikey_otp> CLIENT_ID: your client id integer YUBIKEY_OTP: One-time password generated by yubikey jas@mocca:~/src/yubico-c-client$ ./ykclient --debug 16 ccccccbchvthlivuitriujjifivbvtrjkjfirllluurj Input: client id: 16 token: ccccccbchvthlivuitriujjifivbvtrjkjfirllluurj Verification output (2): Yubikey OTP was replayed (REPLAYED_OTP) jas@mocca:~/src/yubico-c-client$
The project is licensed under a BSD license. See the file COPYING for exact wording. For any copyright year range specified as YYYY-ZZZZ in this package note that the range specifies every single year in that closed interval.