lib/ronin/support/web/websocket.rb
# frozen_string_literal: true
#
# ronin-support-web - A web support library for ronin-rb.
#
# Copyright (c) 2023-2024 Hal Brodigan (postmodern.mod3@gmail.com)
#
# ronin-support-web is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# ronin-support-web is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with ronin-support-web. If not, see <https://www.gnu.org/licenses/>.
#
require_relative 'websocket/client'
require_relative 'websocket/server'
require_relative 'websocket/mixin'
require 'ronin/support/network/tcp'
require 'ronin/support/network/ssl'
module Ronin
module Support
module Web
#
# WebSocket helper methods.
#
module WebSocket
# @!macro [new] ssl_kwargs
# @option ssl [1, 1.1, 1.2, String, Symbol, nil] :version
# The SSL version to use.
#
# @option ssl [Symbol, Boolean] :verify
# Specifies whether to verify the SSL certificate.
# May be one of the following:
#
# * `:none`
# * `:peer`
# * `:fail_if_no_peer_cert`
# * `:client_once`
#
# @option ssl [Crypto::Key::RSA, OpenSSL::PKey::RSA, nil] :key
# The RSA key to use for the SSL context.
#
# @option ssl [String] :key_file
# The path to the SSL `.key` file.
#
# @option ssl [Crypto::Cert, OpenSSL::X509::Certificate, nil] :cert
# The X509 certificate to use for the SSL context.
#
# @option ssl [String] :cert_file
# The path to the SSL `.crt` file.
#
# @option ssl [String] :ca_bundle
# Path to the CA certificate file or directory.
# @!macro [new] client_kwargs
# @option kwargs [String, nil] :bind_host
# The optional host to bind the server socket to.
#
# @option kwargs [Integer, nil] :bind_port
# The optioanl port to bind the server socket to. If not
# specified, it will default to the port of the URL.
#
# @!macro ssl_kwargs
#
# Tests whether the WebSocket is open.
#
# @param [String, URI::WS, URI::WSS] url
# The `ws://` or `wss://` URL to connect to.
#
# @param [Hash{Symbol => Object}] ssl
# Additional keyword arguments for
# `Ronin::Support::Network::SSL.connect`.
#
# @param [Hash{Symbol => Object}] kwargs
# Additional keyword arguments for {Client#initialize}.
#
# @!macro client_kwargs
#
# @return [Boolean, nil]
# Specifies whether the WebSocket is open.
# If the connection was not accepted, `nil` will be returned.
#
# @api public
#
def self.open?(url, ssl: {}, **kwargs)
uri = URI(url)
host = uri.host
port = uri.port
case uri.scheme
when 'ws'
Support::Network::TCP.open?(host,port,**kwargs)
when 'wss'
Support::Network::SSL.open?(host,port,**kwargs,**ssl)
else
raise(ArgumentError,"unsupported WebSocket URI scheme: #{url.inspect}")
end
end
# Connects to a websocket.
#
# @param [String, URI::WS, URI::WSS] url
# The `ws://` or `wss://` URL to connect to.
#
# @param [Hash{Symbol => Object}] ssl
# Additional keyword arguments for
# `Ronin::Support::Network::SSL.connect`.
#
# @param [Hash{Symbol => Object}] kwargs
# Additional keyword arguments for {Client#initialize}.
#
# @!macro client_kwargs
#
# @yield [websocket]
# If a block is given, then it will be passed the WebSocket
# connection. Once the block has returned, the WebSocket connection
# will be closed.
#
# @yieldparam [Client] websocket
# The WebSocket connection.
#
# @return [Client]
# The WebSocket connection.
#
# @example Connecting to a WebSocket server:
# websocket_connect('ws://websocket-echo.com')
# # => #<Ronin::Support::Web::WebSocket::Client: ...>
#
# @example Creating a temporary WebSocket connection:
# websocket_connect('ws://websocket-echo.com') do |websocket|
# # ...
# end
#
# @api public
#
def self.connect(url, ssl: {}, **kwargs)
client = Client.new(url, ssl: ssl, **kwargs)
if block_given?
yield client
client.close
else
client
end
end
#
# Connects to the WebSocket and sends the data.
#
# @param [String] data
# The data to send to the WebSocet.
#
# @param [String, URI::WS, URI::WSS] url
# The `ws://` or `wss://` URL to connect to.
#
# @param [:text, :binary, :ping, :pong, :close] type
# The data frame type.
#
# @param [Hash{Symbol => Object}] ssl
# Additional keyword arguments for
# `Ronin::Support::Network::SSL.connect`.
#
# @param [Hash{Symbol => Object}] kwargs
# Additional keyword arguments for {Client#initialize}.
#
# @!macro client_kwargs
#
# @yield [websocket]
# If a block is given, then it will be passed the WebSocket
# connection. Once the block has returned, the WebSocket connection
# will be closed.
#
# @yieldparam [Client] websocket
# The WebSocket connection.
#
# @return [Client]
# The WebSocket connection.
#
# @api public
#
def self.connect_and_send(data,url, type: :text, ssl: {}, **kwargs)
client = connect(url, ssl: ssl, **kwargs)
client.send(data, type: type)
yield client if block_given?
return client
end
#
# Connects to the WebSocket, sends the data, and closes the connection.
#
# @param [String] data
# The data to send to the WebSocet.
#
# @param [String, URI::WS, URI::WSS] url
# The `ws://` or `wss://` URL to connect to.
#
# @param [:text, :binary, :ping, :pong, :close] type
# The data frame type.
#
# @param [Hash{Symbol => Object}] ssl
# Additional keyword arguments for
# `Ronin::Support::Network::SSL.connect`.
#
# @param [Hash{Symbol => Object}] kwargs
# Additional keyword arguments for {Client#initialize}.
#
# @!macro client_kwargs
#
# @return [true]
#
# @api public
#
def self.send(data,url, type: :text, ssl: {}, **kwargs)
connect(url, ssl: ssl, **kwargs) do |client|
client.send(data, type: type)
end
return true
end
# @!macro [new] server_kwargs
# @option kwargs [String, nil] :bind_host
# The optional host to bind the server socket to.
#
# @option kwargs [Integer, nil] :bind_port
# The optioanl port to bind the server socket to. If not
# specified, it will default to the port of the URL.
#
# @option kwargs [Integer] :backlog (5)
# The maximum backlog of pending connections.
#
# @!macro ssl_kwargs
#
# Starts a WebSocket server.
#
# @param [String, URI::WS, URI::WSS] url
# The `ws://` or `wss://` URL to connect to.
#
# @param [Hash{Symbol => Object}] ssl
# Additional keyword arguments for
# `Ronin::Support::Network::SSL.server`.
#
# @param [Hash{Symbol => Object}] kwargs
# Additional keyword arguments for {Server#initialize}.
#
# @!macro server_kwargs
#
# @yield [server]
# If a block is given, then it will be passed the WebSocket server.
# Once the block has returned, the WebSocket server will be closed.
#
# @yieldparam [Server] server
# The WebSocket server.
#
# @return [Server]
# The WebSocket server.
#
# @api public
#
def self.server(url, ssl: {}, **kwargs)
server = Server.new(url, ssl: ssl, **kwargs)
if block_given?
yield server
server.close
else
server
end
end
#
# Creates a new WebSocket server listening on a given host and port,
# accepting clients in a loop.
#
# @param [String, URI::WS, URI::WSS] url
# The `ws://` or `wss://` URL to connect to.
#
# @param [Hash{Symbol => Object}] ssl
# Additional keyword arguments for
# `Ronin::Support::Network::SSL.server`.
#
# @param [Hash{Symbol => Object}] kwargs
# Additional keyword arguments for {Server#initialize}.
#
# @!macro server_kwargs
#
# @yield [client]
# The given block will be passed the newly connected WebSocket
# client. After the block has finished, the WebSocket client will be
# closed.
#
# @yieldparam [Server::Client] client
# A newly connected WebSocket client.
#
# @return [nil]
#
# @api public
#
def self.server_loop(url, ssl: {}, **kwargs)
server(url, ssl: ssl, **kwargs) do |server|
loop do
client = server.accept
yield client if block_given?
client.close
end
end
end
#
# Opens a WebSocket server, accepts a single connection, yields it to
# the given block, then closes both the connection and the server.
#
# @param [String, URI::WS, URI::WSS] url
# The `ws://` or `wss://` URL to connect to.
#
# @param [Hash{Symbol => Object}] ssl
# Additional keyword arguments for
# `Ronin::Support::Network::SSL.server`.
#
# @param [Hash{Symbol => Object}] kwargs
# Additional keyword arguments for {Server#initialize}.
#
# @!macro server_kwargs
#
# @yield [client]
# The given block will be passed the newly connected WebSocket
# client. After the block has finished, the WebSocket client will be
# closed.
#
# @yieldparam [Server::Client] client
# A newly connected WebSocket client.
#
# @return [nil]
#
# @api public
#
def self.accept(url, ssl: {}, **kwargs)
server(url, ssl: ssl, **kwargs) do |server|
client = server.accept
yield client if block_given?
client.close
end
end
end
end
end
end