Backport security fix #3885 for package hashes to 1.1 #4420
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Backport the security fix of #3885 on Poetry 1.1.
This commit has already been merged in
master
but it didn't make it to the 1.1 minor.This fix is one of the two changes to make Poetry check the hashes of the downloaded files after
poetry.lock
.Unfortunately this PR isn't sufficient to correct the bug, as this other PR needs to be backported to
poetry-core
1.0.Still, it is necessary.