Software license enforcement mechanism for an emulated computing environment

• US 7,313,512 B1
• Filed: 10/18/2002
• Issued: 12/25/2007
• Est. Priority Date: 10/18/2002
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Traut, Eric P., Vega, René A.
• Primary Examiner(s): Knight, Anthony
• Assistant Examiner(s): STEVENS, THOMAS H
• Application Number:
  US10/274,298
• Time in Patent Office: 1,894 Days
• Field of Search: 726/27, 726/35, 726/31, 726/26, 703/22, 703/23, 705/59, 718/1, 717/168, 717/138
• US Class Current: 703/23
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• CPC Class Codes: G06F 9/45533 Hypervisors; Virtual machine monitors
• CPC Class Codes: G06Q 10/0631 Resource planning, allocation, distributing or scheduling for enterprises or organisations

Abstract

In an emulated computing environment, a method is provided for licensing software of one or more guest computer systems. A license key server is provided in the host computer system for monitoring the initiation of unlicensed software, including operating system software, in the guest computer system. A determination is made by the license key server as to whether additional a license is available for each unlicensed software application. If a license is available, a license is granted and the count of available licenses is decremented. If a license is not available, a license is not granted and the unlicensed software application in the guest computer system is disabled.

Claims

1. A method for licensing software in an emulated computing environment, the emulated computing environment comprising one or more emulated computer systems being supported by a host computer system, the method comprising:

providing a limited number of software licenses to be consumed by unlicensed software in the emulated computer systems;

identifying the presence of an unlicensed software program in an emulated computer system by an emulated peripheral device that communicates with a key server of the host computer;

determining at the key server in the host computer system whether an unconsumed software license exists for the unlicensed software in the emulated computer system;

granting a license to the unlicensed software program in the emulated computer system if it is determined that an unconsumed software license does exist; and

disabling the operation of the unlicensed software program in the emulated computer system if it is determined that an unconsumed software license does not exist.

2. The method for licensing software in an emulated computing environment of claim 1, wherein the unlicensed software in the emulated computer system is the operating system software of the emulated computer system.

3. The method for licensing software in an emulated computing environment of claim 2, wherein the step of identifying the presence of an unlicensed software program in an emulated computer system comprises the step of identifying the presence of an unlicensed operating system in the emulated computer system without compromising the self-transparency of the unlicensed operating system in the emulated computer system.

4. The method for licensing software in an emulated computing environment of claim 3, wherein the step of identifying the presence of an unlicensed software program in an emulated computer system comprises the step of monitoring the action of the operating system software of the emulated computer system to determine if the guest operating system identifies during an initiation sequence the emulated peripheral device in the emulated computer system, wherein the emulated peripheral device is without a physical analog and requires that the guest operating system communicate with the emulated peripheral device through a device driver in the guest operating system.

5. The method for licensing software in an emulated computing environment of claim 3, wherein the step of identifying the presence of an unlicensed software program in an emulated computer system comprises the step of monitoring the action of the operating system software of the emulated computer system to determine if the emulated computer system executes a certain instruction, wherein the emulated computer system will execute the certain instruction and wherein the host computer system will cause an exception to occur in the event of the attempted execution of the certain instruction.

6. The method for licensing software in an emulated computing environment of claim 2, further comprising the step of maintaining in the host computer system a count of the remaining available licenses for unlicensed software in the emulated computer systems.

7. The method for licensing software in an emulated computing environment of claim 6, wherein the step of granting a license to the unlicensed software program in the emulated computer system comprises the step of decrementing the count of available licenses for unlicensed software in the emulated computer systems.

8. The method for licensing software in an emulated computing environment of claim 6, wherein the step of disabling the operation of the unlicensed software program in the emulated computer system if it is determined that an unconsumed software license does exist comprises the step of disabling the operation of the unlicensed software program in the emulated computer system if the count of available licenses for unlicensed software in the emulated computer system is zero.

9. The method for licensing software in an emulated computing environment of claim 6, further comprising the steps of,

monitoring the operational status of the emulated computer systems;

and

incrementing the count of available licenses for unlicensed software in the emulated computer systems if it is determined that a previously licensed software program has terminated.

10. The method for licensing software in an emulated computing environment of claim 9, wherein the step of monitoring the operational status of the emulated computer systems comprises the step of receiving periodic communications from each previously licensed software program to confirm that each previously licensed software program remains operational.

11. A method for licensing software in an emulated computing environment that includes at least one emulated computer system, the at least one emulated computer system having software associated therewith, the method comprising:

identifying an emulated computer system, the emulated computer system comprising an emulated peripheral device that initiates a request for a license;

if an unconsumed license exists for the software associated with the emulated computer system, granting the license to the software; and

if the unconsumed license does not exist for the software associated with the emulated computer system, disabling the operation of the software.

12. The method for licensing software in an emulated computing environment of claim 11, wherein the step of identifying an emulated computer system comprises the step of recognizing that the emulated computer system has performed an operation that is characteristic of an emulated computer system.

13. The method for licensing software in an emulated computing environment of claim 12, wherein the step of identifying an emulated computer system comprises the step of recognizing that the operating system of the emulated computer system has identified a peripheral device that is not present in non-emulated computer systems.

14. The method for licensing software in an emulated computing environment of claim 12, wherein the step of identifying an emulated computer system comprises the step of recognizing that the emulated computer system has executed a specified instruction in a specified manner.

15. The method for licensing software in an emulated computing environment of claim 11, wherein the software associated with the emulated computer system is the operating system software for the emulated computer system.

16. The method for licensing software in an emulated computing environment of claim 11, wherein the step of identifying an emulated computer system comprises the step of recognizing that an emulated computer system exists without compromising the self-transparency of the emulated computer system.

17. A method for licensing software in an emulated computing environment, the emulated computing environment comprising at least one virtual machine being supported by a host computer system, wherein each virtual machine includes operating system software, the method comprising:

providing a limited number of software licenses to be consumed by operating system software associated with the virtual machines;

identifying a virtual machine having unlicensed operating system software, the virtual machine comprising an emulated peripheral device that initiates a request for a license;

determining in the host computer system whether an unconsumed software license exists for the operating system software of the virtual machine;

granting a license to the operating system software of the virtual machine if it is determined that an unconsumed software license does exist; and

disabling the operation of the operating system software of the virtual machine if it is determined that an unconsumed software license does not exist.

18. The method for licensing software in an emulated computing environment of claim 17, wherein the step of identifying a virtual machine having unlicensed operating system software comprises the step of identifying a virtual machine without compromising the self-transparency of the virtual machine.

19. The method for licensing software in an emulated computing environment of claim 17, wherein the step of determining in the host computer system whether an unconsumed software license exists for the operating system software of the virtual machine comprises the step of maintaining a count of unconsumed software licenses.

20. The method for licensing software in an emulated computing environment of claim 19, wherein the step of determining in the host computer system whether an unconsumed software license exists for the operating system software of the virtual machine comprises the step of decrementing the count of unconsumed software licenses when a software license is granted to the operating system software of a virtual machine and incrementing the count of unconsumed software licenses when it is determined that a previously licensed operating system software of a virtual machine has ceased operation.