- update to 1.15.1
* Added callback-based host validation in SSHClient, allowing callers to decide
programmatically whether to trust server host keys and certificates rather
than having to provide a list of trusted values in advance.
* Changed SSH client code to only load the default known hosts file if if exists.
Previously an error was returned if a known_hosts value wasn't specified
and the default known_hosts file didn't exist. For host validate to work in
this case, verification callbacks must be implemented or other forms
of validation such as X.509 trusted CAs or GSS-based key exchange must be used.
* Fixed known hosts validation to completely disable certificate checks when
known_hosts is set to None.
* Switched curve25519 key exchange to use the PyCA implementation
* Added get_fingerprint() method to return a fingerprint of an SSHKey.
* Added the ability to pass keyword arguments provided in the scp() command
through to asyncssh.connect() calls it makes, allowing things like custom
credentials to be specified.
* Added support for a reuse_port argument in create_server().
* Added support for "soft" EOF when line editing in enabled
* Added support for the Windows 10 OpenSSH ssh-agent.
* Reworked scoped link-local IPv6 address normalization to work better on Linux systems.
* Fixed a problem preserving directory structure in recursive scp().
* Fixed SFTP chmod tests to avoid attempting to set the sticky bit on a plain file
* Updated note in SSHClientChannel's send_signal() documentation to reflect
that OpenSSH 7.9 and later should now support processing of signal messages.