* Prevent using post modules with the session
It doesn't work reliably because of winpty and how the output is
mangled.
* Set the limit correctly
* Fix Linux PTY downgrade issues
* Remove filtering
The filtering implementation is incomplete and unnecessary.
Filtering is unnecessary because Linux sessions execute a stub on
session start up that uses a combiantion of stty and a fifo to emulate a
PTY-less session. Windows sessions do not need filtering because they
have been explictly marked as being incompatible with the Post API which
is confused by the extra characters.
The filtering implementation is incomplete because it does not account for
echo fragments that are split across lines. It also does not account for
all of the ANSI escape codes.
* Add module docs for enum_ssm
Alter WebSocket::Interface::Channel to accept a mask_write flag to
set the Channel behavior for outgoing data (since the on_data_write
handler can only deal with the buffer provided, not how the wsframe
containing it is written to the "wire"). Set the flag to false for
SSM's WebSocket operations.
Extract Rex::Proto::Http::WebSocket::AmazonSsm from the handler to
permit reuse by other framework elements.
Implement SSM-specific UUID handling.
Create sane SsmFrame constructor to permit convenient operations.
Implement Http::WebSocket::AmazonSsm::Inteface::SsmChannel from
Http::WebSocket::Inferface::Channel with message-type handling and
output processing. Acknowledge incoming messages, process incoming
acknowledgements, increment sequence IDs appropriately, and handle
basic logging.
This new session type removes the 2500 char output restriction and
stateless peer cwd.
Testing:
Execution of handler now provides stateful interactive shells
Next steps:
More testing, preferably by other people with upstream framework.
Peerinfo and presentation updates for the session channel
Misc cleanup
Future work:
Implement new SSM session type with support for multi-console,
port-forwarding/socket routing, and custom SSM documents.
Implement FSM handlers for session suspension and resumption in
Http::WebSocket::AmazonSsm::Interface::SsmChannel
Spencer McIntyre