<p>The signature padding tag cannot be part of an immutable region because its size/value can/will change. There is also little reason to include padding within plaintext used for digests/signatures</p>
<p>As for ordering: you chose a different value for the padding tag than what is implemented in rpm5. So a different order is expected when sorting. The value used in rpm5 was chosen to always sort after all other defined tags that might appear in signature headers in order to function as "free space" padding.</p>

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