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Consider extensible signature standards support

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#943 0 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
5/5
Estimated time
Over a week
Newbie friendliness
25/100
Issue type
Feature
Clarity
Needs clarification
Activity status
Quiet
Tech stack
json

Research direction

Start with the proposed signatures schema in issue #943 and review the linked discussion from pull request #858. Work out a future-compatible representation for multiple signature standards while preserving the existing JSS approach. Done means the specification has a clear, technically valid design that supports additional signature types.

Written by the indexing model from the issue text.

Description

proposed core enhancement

i am a bit concerned about possible changes in the future.
What if might transition from JSS to something else some day?
the way it is currently structured will block any path for this.

i'd rather go with something like

{
   // ...

    "signatures": {
      "type": "array",
      "minItems": 1,
      "items": {
        "oneOf": [
          {
            "type": "object",
            "description": "description from cyclonedx-jss_X590_2023_10-2.0.schema.json#/$defs/signatureObject",
            "properties": {
              "type": { "const": "JSS_X590" },
              "data": { "$ref": "cyclonedx-jss_X590_2023_10-2.0.schema.json#/$defs/signatureObject" }
            },
            "required": ["type", "data"],
            "unevaluatedProperties": false
          },
          // any later type of signature we might add in the future 
        ]
      }
    }

}

Originally posted by @jkowalleck in https://github.com/CycloneDX/specification/pull/858#discussion_r3334967070


While the recommended approach will not "technically" work, the desire to support multiple signature standards remains. Attempt to devise a way this can be supported in the future.

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