Libraries

Yubico provides the libraries for YubiKey OTP development and parsing. To be useful, these packages need to be combined with a database and server component.

Yubico Libraries

Basic YubiKey OTP parsing libraries for C and Java, created by Yubico.

C Library: “yubico-c” project
Java Library: “yubico-j” project

Windows ActiveX/COM component*:

Windows installer
Documentation (pdf)

Third-Party Libraries

Basic YubiKey OTP parsing libraries, not written by Yubico.

PHP Library: “yubico-php-lib”
PHP Library: “yubiclass” Project
Perl Library: CPAN “Auth-Yubikey Decrypter” module
  
Python: “yubikey-python” Project


PAM module

The PAM module enables the use of the YubiKey for authentication in any environment that relies on the Pluggable Authentication Module (PAM) system. Useful for GNU/Linux desktop login, Solaris login, Windows login via pGina, MyProxy, SSH, and so on.

PAM: “pam-yubico”

Windows Server API*

Server support functionality for challenge-response, YubiKey OTP and OATH-HOTP validation.

User guide (pdf)
Binary installer (Digitally signed)

* Not Open Source

Windows Client COM API*

The Client API for YubiKey 2.2 and later versions, featuring support for device serial numbers and challenge-response.

User guide (pdf)
Binary installer for 32-bit / x86 (Digitally signed)
Binary installer for 64-bit / x64 (Digitally signed)