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hooks: Add dkimpy support

This patch adds support in the default hook for using dkimpy for DKIM
signing.

Unfortunately, dkimpy binaries have the same name as driusan/dkim's, so
we need to use --help to disambiguate. It's not pretty but it should
work, and is quite self contained.

Also, for the integration tests, we still need driusan/dkim because
dkimpy lacks the features needed. Specifically, dkimpy's dkimverify
can't be made to use custom DNS, or override the TXT values in any way,
so we can't verify that the generated signature is reasonable.

Thanks to ne9z@github for suggesting this change and providing an
alternative patch in https://github.com/albertito/chasquid/pull/19.
This commit is contained in:
Alberto Bertogli
2021-07-09 18:14:00 +01:00
parent d78056aff5
commit 270a071c1e
10 changed files with 175 additions and 11 deletions

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test/t-19-dkimpy/content Normal file
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@@ -0,0 +1,9 @@
Subject: Prueba desde el test
To: someone@testserver
Crece desde el test el futuro
Crece desde el test
.
El punto de arriba testea el dot-stuffing, que es importante para DKIM.