After upgrading packages to latest, including OpenSSL 3.0, Python can no longer use ripemd160

[cculianu (Calin Culianu)]

I'm on Big Sur.

Python 3.6, 3.7, 3.8, and 3.9 can't use the hashlib hasher "ripemd160", even though that hasher is listed as "available".

See below:

$ python3
Python 3.10.0 (default, Nov  7 2021, 21:08:03) [Clang 12.0.5 (clang-1205.0.22.11)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import hashlib
>>> hashlib.algorithms_available
{'sha512_224', 'ripemd160', 'md5-sha1', 'sha1', 'shake_128', 'shake_256', 'sha512_256', 'sha256', 'whirlpool', 'blake2b', 'sha3_512', 'sha384', 'sm3', 'blake2s', 'sha3_224', 'sha224', 'mdc2', 'md4', 'md5', 'sha3_256', 'sha3_384', 'sha512'}
>>> hashlib.new('ripemd160')
Traceback (most recent call last):
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/hashlib.py", line 160, in __hash_new
    return _hashlib.new(name, data, **kwargs)
ValueError: [digital envelope routines] initialization error

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/hashlib.py", line 166, in __hash_new
    return __get_builtin_constructor(name)(data)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/hashlib.py", line 123, in __get_builtin_constructor
    raise ValueError('unsupported hash type ' + name)
ValueError: unsupported hash type ripemd160

I suspect this new problem has to do with the new OpenSSL3.0. Can we please revert back to 1.1? It seems 3 has caused a bunch of problems already (see my other ticket related to tor not building).

I had to manually modify my /opt/local/var/ macports stuff to force macports to use openssl1.1, and then I told it to reinstall Python3.9 with the -s options (rebuild from source), and now that works.

The problem is most definitely related to openssl 3.0 !!! Please fix!