Use with openssl library build without md4.

[adiroiban]

As reported here jborean93/smbprotocol#173 (comment) it looks like Ubuntu 22.04 will have openssl without MD4

I guess there are out there other Linux distributions that might already ship without md4, is just that nobody uses them with NTLMv1

I see that md4 is used in pyspnego here

pyspnego/src/spnego/_ntlm_raw/crypto.py

Line 133 in 03eb0c9

session_base_key = md4(nt_hash)

With a simply "proxy" implementation here

pyspnego/src/spnego/_ntlm_raw/crypto.py

Line 342 in 03eb0c9

def md4(m: bytes) -> bytes:

I guess that the only option for legacy, is to vendor/copy/reimplement md4 in pysnego

Like this https://github.com/rpicard/py-md4 ... no licence for the code :(

Or document that ntlmv1 is not supported with old NTLMv1

[jborean93]

This is going to fun, on 1 hand using md4 should be respected by OS settings but on the other hand md4 is absolutely required for NTLM which while evil is a very common use case of this library. Using a custom implementation is probably the best way forward.

[jborean93]

This should be fixed with #38.