[BUG] - Configuration under Match statements with invalid or unknown Match criteria words is

Are you using paramiko as a client or server?

Client

What feature(s) aren't working right?

sshconfig

What version(s) of paramiko are you using?

5.0.0

What version(s) of Python are you using?

3.14.5

What operating system and version are you using?

Tested on Ubuntu 24.04 and CachyOS

If you're connecting as a client, which SSH server are you connecting to?

Not relevant (bug is before connection)

If you're using paramiko as part of another tool, which tool/version?

No response

Expected/desired behavior

If paramiko doesn't understand a Match criteria it should not read its configuration (and probably even error or at least warn)

Actual behavior

Paramiko still reads the configuration, even though it can't verify if the Match statement actually matches

How to reproduce

Config

Match localnetwork 9.8.7.6/32
    ProxyJump THISSHOULDNOTMATCH

Test program

import paramiko
print(paramiko.SSHConfig.from_path("/tmp/poc/config").lookup("1.2.3.4")["proxyjump"])

Anything else?

The wrong logic is in the function _does_match in paramiko/config.py

I found this error because I had a localnetwork match in the config, which is a valid keyword in OpenSSH, but not handled by paramiko.