<p>Rpm supports uncompressed payload as it is (see commit <a class="commit-link" data-hovercard-type="commit" data-hovercard-url="https://github.com/rpm-software-management/rpm/commit/81acadbf1f55d128d733b5d9552276b4679ac682/hovercard" href="https://github.com/rpm-software-management/rpm/commit/81acadbf1f55d128d733b5d9552276b4679ac682"><tt>81acadb</tt></a> and <a class="commit-link" data-hovercard-type="commit" data-hovercard-url="https://github.com/rpm-software-management/rpm/commit/9666e8c297515910674e7a4122016e038251664b/hovercard" href="https://github.com/rpm-software-management/rpm/commit/9666e8c297515910674e7a4122016e038251664b"><tt>9666e8c</tt></a>), but that doesn't help the deltarpm case as this is a build-time thing.</p>
<p>I did consider adding a separate digest for the uncompressed data back when adding RPMTAG_PAYLOADDIGEST (there are various uses for the data), but to sanely do so would require teaching rpmio to calculate digests both pre- and/or post-(de)compression per request.</p>
<p>Somehow permitting the payload bits to differ from what was created at build-time would be a pretty significant change for rpm, but I agree there's a point in it: ultimately it's the authenticity of delivered bits that matter, not the delivery box (of compression). I'll need to think about this.</p>

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