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Add in-toto format as hash of shard hashes #265

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Commits on Aug 1, 2024

  1. Add in-toto format as hash of shard hashes

    This converts model serialization manifests that record every model file
    shard hash into an in-toto payload that can then be passed to Sigstore's
    `sign_intoto` for signing to generate a Sigstore `Bundle` (if using
    Sigstore).
    
    To identify the models, we compute a hash of all hashes of the file
    shards and use that as the subject. The individual file hashes are used
    as the payload and we would have the verifier check them as part of the
    verification process.
    
    Signed-off-by: Mihai Maruseac <mihaimaruseac@google.com>
    mihaimaruseac committed Aug 1, 2024
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