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# frozen_string_literal: true
# Copyright, 2017, by Samuel G. D. Williams. <http://www.codeotaku.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
require_relative 'socket'
require 'openssl'
module Async
module IO
SSLError = OpenSSL::SSL::SSLError
# Asynchronous TCP socket wrapper.
class SSLSocket < Generic
wraps OpenSSL::SSL::SSLSocket, :alpn_protocol, :cert, :cipher, :client_ca, :context, :export_keying_material, :finished_message, :peer_finished_message, :getsockopt, :hostname, :hostname=, :npn_protocol, :peer_cert, :peer_cert_chain, :pending, :post_connection_check, :setsockopt, :session, :session=, :session_reused?, :ssl_version, :state, :sync_close, :sync_close=, :sysclose, :verify_result, :tmp_key
wrap_blocking_method :accept, :accept_nonblock
wrap_blocking_method :connect, :connect_nonblock
def self.connect(socket, context, hostname = nil, &block)
client = self.new(socket, context)
# Used for SNI:
if hostname
client.hostname = hostname
end
begin
client.connect
rescue
# If the connection fails (e.g. certificates are invalid), the caller never sees the socket, so we close it and raise the exception up the chain.
client.close
raise
end
return client unless block_given?
begin
yield client
ensure
client.close
end
end
include Peer
def initialize(socket, context)
if socket.is_a?(self.class.wrapped_klass)
super
else
io = self.class.wrapped_klass.new(socket.to_io, context)
super(io, socket.reactor)
# We detach the socket from the reactor, otherwise it's possible to add the file descriptor to the selector twice, which is bad.
socket.reactor = nil
# This ensures that when the internal IO is closed, it also closes the internal socket:
io.sync_close = true
@timeout = socket.timeout
end
end
def local_address
@io.to_io.local_address
end
def remote_address
@io.to_io.remote_address
end
def close_write
self.shutdown(Socket::SHUT_WR)
end
def close_read
self.shutdown(Socket::SHUT_RD)
end
def shutdown(how)
@io.flush
@io.to_io.shutdown(how)
end
end
# We reimplement this from scratch because the native implementation doesn't expose the underlying server/context that we need to implement non-blocking accept.
class SSLServer
extend Forwardable
def initialize(server, context)
@server = server
@context = context
end
def fileno
@server.fileno
end
def dup
self.class.new(@server.dup, @context)
end
def_delegators :@server, :local_address, :setsockopt, :getsockopt, :close, :close_on_exec=, :reactor=, :timeout, :timeout=
attr :server
attr :context
def listen(*args)
@server.listen(*args)
end
def accept(task: Task.current, **options)
peer, address = @server.accept(**options)
wrapper = SSLSocket.new(peer, @context)
return wrapper, address unless block_given?
task.async do
task.annotate "accepting secure connection #{address.inspect}"
begin
# You want to do this in a nested async task or you might suffer from head-of-line blocking.
wrapper.accept
yield wrapper, address
ensure
wrapper.close
end
end
end
include Server
end
end
end
|
