Hacking the FlexLM keygens. So i’ve found an unpacked version of keygen for AutoCAD 2008, created an evaluation installation of AutoCAD 2008 from Autodesk Revit Architecture 2008 (i have a license for it to run on the network, by the way) and started my explorations. A usual PE executable consists of some sections: header, data, imported functions.

Scope This document relates to the FlexLM / FlexNet Publisher license manager, and discusses OpenLM’s capabilities in supporting this license manager. General FLEXlm software is a prominent license management solution that enables software vendors to impose restrictions on the number of software seats available to their customers. FLEXlm supports different licensing policies such as Floating (aka Concurrent) and Node Locked licenses. This type of software system is also referred to as DRM (Digital Rights Management) Solutions.

FLEXlm was originally a joint development of GLOBEtrotter Software and Highland Software in 1988. GLOBEtrotter was then acquired by in 2000, which renamed the product FlexNet. In 2008 the company was sold to Acresso Software, and it’s name was changed to Flexera. The product was named, but is still widely referred to as FlexLM.

Flexnet License Manager operation The general structure of the Flexnet license manager is shown below: LICENSE SERVER MANAGER lmadmin or lmgrd FlexLM daemons are supplied either by the licensed FLEXenabled application publisher or by Flexera Software. Its job is to communicate with the application, and receive the license request from it.It then passes the request to the vendor daemon.

VENDOR DAEMON Created by the publisher, and is unique to each FlexEnabled application installed on the network. It is the vendor daemon’s job to process the license request and to either grant it or deny it, depending on the number of available licenses, and predefined license usage constraints. LICENSE FILE Created by your software supplier, and holds detailed license information such as the quantity and time extent of the license TRUSTED STORAGE Some publishers provide trusted storage as an encrypted alternative to using license files. DEBUG LOG AND REPORT LOG FlexNet logs written by the license server manager (lmadmin or lmgrd), typically accounting the license check-outs and check-ins, and license denials. OPTION FILES Files created by license administrators to restrict license usage to specific users or user groups.

Why do you need software license management?