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Must signed.version be incremented every time a role is re-signed?

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難度
4/5
預估耗時
3-5 天
新手友好度
35/100
Issue 類型
文件
描述清晰度
基本清楚
活躍度
停滯
技術堆疊
python

研究方向

先查看所連結的 TUF 規範中的 timestamp 檔案格式部分,然後比較 examples/repo_example/basic_repo.py 和所參照的 tuf/api/metadata.py 位置中對 signed.version 的處理。在決定措辭之前,先查看現有討論。完成的標準是:文件明確說明重新簽署何時需要遞增版本,並包含所要求的已過期 timestamp 範例。

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描述

documentation repository

Description of issue or feature request:

After reading the TUF specification and studying the basic_repo.py example, one thing remains unclear to me:

When exactly do we need to increment signed.version?

It is clear that we need to increment the signed.version after e.g. adding a new target, as detailed in the basic_repo.py example.

However, what if we only modify signed.expires, after a role has expired, without changing anything else? Do we also need to increment signed.version in that case? That would imply e.g. the version of timestamp is incremented every time it is re-signed.

In general, do we need to increment a role's signed.version every time we re-sign that role, without exception?

Current behavior:

It is not explicitly clear from the documentation when signed.version needs to be incremented.

Expected behavior:

It would be very helpful if the documentation/specification could clarify this point explicitly.

Perhaps the basic_repo.py example could also show a snippet where an expired timestamp is re-signed (without any changes to the root, targets, or snapshot metadata).

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