yubico-abap is a ABAP class for verifying Yubico One-Time-Passwords. It is provided as a SAPlink file for easy deployment. Check out the usage instructions for a how-to guide.

Special thanks go to

• Yubico AB for creating such a cool product.
• Leo Laporte and Steve Gibson for their introduction to YubiKey in episode 143 of Security Now: YubiKey.
• Martin Hajnik who allowed me to use his HMAC implementation.
• Michele Berardi who allowed me to use his implementation of the SUSR0001 User Exit.
• Dan McWeeney and Ed Herrmann for their SAPlink Project which allows the SAP Community to exchange code.