- dnspython 2.0 requires cryptography 2.6 so we now always require that
(no longer a choice between cryptography and pycryptodomex)
- test_dnssec.py is deleted as it was testing the monkey-patch
related: #6538
Since #6014, pyaes is not really needed anymore.
As we currently require either one of pycryptodomex or cryptography,
even if pyaes is available, it will not be used.
We could strip it out completely from crypto.py...
In any case, pyaes is still pulled in by some hw wallet dependencies indirectly;
but the core library no longer depends on it.
Previously we stuck with version 2.6.8 as that had no deps but later
versions introduced several deps. However, now latest version only
has two dependencies (one of which has the same maintainer).
Futher, there are some bugs with 2.6.8 when used with new Qt,
e.g. with dropdowns that I want fixed (which it is in the newer ones).
related https://github.com/ColinDuquesnoy/QDarkStyleSheet/issues/182
note: low R grinding would not have to be duplicated if we trusted the caller
to have done it already (as is the case with the classes in ecc.py), and if
we propagated the choice of "random_k" as part of the nonce_function passed
to libsecp256k1 (which is not currently done)
pycryptodomex 3.7 implemented chacha20_poly1305 and chacha20,
and it is already used (although optionally) to speed up AES,
so we can remove cryptography and make pycryptodomex mandatory for LN