Definition of Key Purpose for Omnivision OX05B Camera Drivers

The camera device driver interprets the key purpose in camera configuration. NVIDIA DriveOS™ provides default drivers for OX05B camera sensors and defines the following options for the keyPurpose configuration field:

1. keyPurpose: “IMG_HMAC” - HMAC-SHA256 key is used for the HMAC verify operation on frame data.

2. keyPurpose: “IMG_SHA” - SHA256 is used to compute the hash digest of frame data parts for image authentication.

For additional information about how these keys are used, refer to the specification for OX05B sensors from Omnivision, the camera vendor.