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Wrote a little something to read Host & Drive Revocation Lists from a Media Key Block. Question is: should I waste time to validate records against the public key in the spec? :3
Terminal output showing the content of a media key block, read record by record. On this screenshot, we can see the MKB version type and Host Revocation List.
Other screenshot that shows part of the Host Revocation List, the Drive Revocation List, the Media Key Verification record, and the structure of the rest of the file.