BINDING APPLICATIONS TO DEVICE CAPABILITIES

• US 20120284702A1
• Filed: 05/02/2011
• Published: 11/08/2012
• Est. Priority Date: 05/02/2011
• Status: Abandoned Application

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Ganapathy, Narayanan, Morris, Max G., Sliwowicz, Paul, Davis, Darren R., Roussos, George Evangelos
• Application Number:
  US13/099,260
• Publication Number:
  US 20120284702A1
• Time in Patent Office: Days
• US Class Current: 717/174
• CPC Class Codes: G06F 21/6218 to a system of files or objects, e.g. local or distributed file system or database
• CPC Class Codes: G06F 21/82 Protecting input, output or interconnection devices
• CPC Class Codes: G06F 9/468 Specific access rights for resources, e.g. using capability register

Abstract

Installation data associated with a hardware device is obtained (e.g., at the time the device is installed on a computing device). Identifiers of applications that are allowed to access a capability of the hardware device are identified from the installation data and stored in a device permissions record as being allowed to access the capability of the hardware device. Subsequently, a request to access the capability of the hardware device is received from an application. A check is made as to whether the application is identified in a device permissions record as being allowed to access the capability of the hardware device. The application is allowed to access the capability of the hardware device if the device permissions record indicates the application is allowed to access the capability of the hardware device, and otherwise the request from the application is denied.

Claims

1. A method in a computing device, the method comprising:

receiving, from an application, a request to access a capability of a hardware device installed on the computing device;

checking, by the computing device, whether the application is identified in a device permissions record as being allowed to access the capability of the hardware device; and

allowing the application to access the capability of the hardware device if the device permissions record indicates the application is allowed to access the capability of the hardware device, otherwise denying the request.

2. A method as recited in claim 1, wherein the checking comprises obtaining an identifier of the application and checking whether the identifier of the application is included in the device permissions record as associated with the capability of the hardware device.

3. A method as recited in claim 2, wherein the identifier of the application comprises a hash value generated by applying a cryptographic hash function to metadata of the application, the hash value being digitally signed by an entity trusted by a module of the computing device performing the checking.

4. A method as recited in claim 1, wherein the request comprises a request to access a device interface class that identifies the capability of the hardware device.

5. A method as recited in claim 4, wherein the device permissions record includes a list of one or more application identifiers that are allowed to access the device interface class, and wherein checking whether the application is identified in the device permissions record comprises checking whether an identifier of the application is included in the list of one or more application identifiers.

6. A method as recited in claim 1, wherein the device permissions record includes a list of one or more application identifiers that are allowed to access the capability of the hardware device, the method further comprising adding one or more new application identifiers to the list of one or more application identifiers during installation on the computing device of a new hardware device.

7. A method as recited in claim 1, the request comprising a request to access a hardware device from a particular vendor, the allowing comprising allowing the application to access the capability of the hardware device only if the device permissions record indicates the application is allowed to access the capability of the hardware device from the particular vendor.

8. A method as recited in claim 1, wherein the device permissions record includes multiple capability identifiers that need not be defined to an operating system of the computing device and, for each of the multiple capability identifiers an associated list of one or more application identifiers that are allowed to access the capability identified by the capability identifier, the method further comprising adding, during installation on the computing device of a new hardware device, an additional capability identifier and an additional list of one or more identifiers that is associated with the additional capability identifier.

9. A method as recited in claim 8, wherein each of the multiple capability identifiers comprises a device interface class.

10. A method as recited in claim 8, wherein each of the multiple capability identifiers comprises a hardware instance identifier.

11. A method as recited in claim 8, wherein each of the multiple capability identifiers comprises a model identifier.

12. A method in a computing device, the method comprising:

obtaining installation data associated with a hardware device;

identifying, from the installation data, an identifier of an application that is allowed to access a first capability of the hardware device; and

storing the identifier of the application in a device permissions record as being allowed to access, without further user consent, the first capability of the hardware device.

13. A method as recited in claim 12, further comprising performing the identifying and storing during installation of the hardware device on the computing device.

14. A method as recited in claim 12, further comprising:

obtaining update data associated with the hardware device;

identifying, from the update data, an identifier of an additional application that is allowed to access the first capability of the hardware device; and

storing the identifier of the additional application in the device permissions record as being allowed to access the first capability of the hardware device.

15. A method as recited in claim 12, wherein the device permissions record includes multiple capability identifiers and, for each of the multiple capability identifiers an associated list of one or more application identifiers that are allowed to access the capability identified by the capability identifier, wherein the first capability of the hardware device is identified by one of the multiple capability identifiers, and wherein storing the identifier of the application includes adding the application identifier to the list of one or more application identifiers associated with the capability identifier that identifies the first capability of the hardware device.

16. A method as recited in claim 12, the first capability of the hardware device being associated with a consent type indicating that access to the first capability of the hardware device is allowed only to privileged applications identified in a list of application identifiers, and a second capability of the hardware device being associated with a consent type indicating that access to the second capability of the hardware device is allowed regardless of which application is requesting access to the second capability of the hardware device.

17. A method as recited in claim 12, wherein the device permissions record includes multiple capability identifiers and, for each of the multiple capability identifiers an associated list of one or more application identifiers that are allowed to access the capability identified by the capability identifier, and wherein storing the identifier of the application comprises adding, to the multiple capability identifiers, a new capability identifier that identifies the first capability of the hardware device, and adding a new list of one or more application identifiers associated with the new capability identifier.

18. A method as recited in claim 12, further comprising:

receiving, from the application, a request to access the first capability of the hardware device;

checking, by a trusted component of the computing device, whether the application is identified in the device permissions record as being allowed to access the first capability of the hardware device; and

allowing the application to access the first capability of the hardware device due to the device permissions record indicating that the application is allowed to access the first capability of the hardware device.

19. A method as recited in claim 12, further comprising:

receiving, from an additional application, a request to access the first capability of the hardware device;

checking whether the additional application is identified in the device permissions record as being allowed to access the first capability of the hardware device; and

allowing the additional application to access the first capability of the hardware device if the device permissions record indicates that the application is allowed to access the first capability of the hardware device, otherwise denying the request.

20. A method in a computing device, the method comprising:

obtaining installation data associated with a hardware device, the hardware device being of a particular hardware device type;

identifying, from the installation data, both a device interface class that identifies a particular collection of capabilities of the particular hardware device type and an identifier of each of one or more applications that are allowed to access the particular collection of capabilities;

storing the identifier of each of the one or more applications in a device permissions record as being associated with an identifier of the device interface class;

receiving, from an application, a request to open a handle to the device interface class;

checking, by the computing device, whether an identifier of the application is an identifier stored in the device permissions record as being associated with the identifier of the device interface class; and

returning the handle to the application if the identifier of the application is an identifier stored in the device permission record as being associated with the identifier of the device interface class, otherwise denying the request.