Snap integrity dmverity rework #14871
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…format also dmverity.Format will simply return the root hash instead of the old Info struct since the new design doesn't have a need for a separate header.
adding helpers for retrieving and parsing a dm-verity superblock from a dm-verity hash device/file. This will be first consumed by the snap integrity API which will need to detect the salt that was used for the dm-verity data generation. Moreover callers to dmverity.Format will need to have a way to retrieve the parameters used by veritysetup if no parameters are passed (and veritysetup chooses default values).
This was referenced Dec 17, 2024
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This has failing tests as the snap integrity API is still using the old dmverity API. #14872 resolves this.
Jira: https://warthogs.atlassian.net/browse/FR-9884