remove SSL support

We implemented barely-advertised support for SSL for two reasons:

1) to detect corruption on LANs beyond what TCP offers
2) to support other servers based on unicorn (never happened)

Since this feature is largely not useful for unicorn itself,
there's no reason to penalize unicorn 5.x users with bloat.

In our defense, SSL support appeared in version 4.2.0 :)

5 files changed, 0 insertions, 162 deletions

diff --git a/lib/unicorn/configurator.rb b/lib/unicorn/configurator.rb
index 5962418..d14e608 100644
--- a/lib/unicorn/configurator.rb
+++ b/lib/unicorn/configurator.rb
@@ -1,6 +1,5 @@
 # -*- encoding: binary -*-
 require 'logger'
-require 'unicorn/ssl_configurator'
 
 # Implements a simple DSL for configuring a \Unicorn server.
 #
@@ -13,7 +12,6 @@ require 'unicorn/ssl_configurator'
 # See the link:/TUNING.html document for more information on tuning unicorn.
 class Unicorn::Configurator
   include Unicorn
-  include Unicorn::SSLConfigurator
 
   # :stopdoc:
   attr_accessor :set, :config_file, :after_reload
diff --git a/lib/unicorn/http_server.rb b/lib/unicorn/http_server.rb
index 69bf362..a523fce 100644
--- a/lib/unicorn/http_server.rb
+++ b/lib/unicorn/http_server.rb
@@ -1,5 +1,4 @@
 # -*- encoding: binary -*-
-require "unicorn/ssl_server"
 
 # This is the process manager of Unicorn. This manages worker
 # processes which in turn handle the I/O and application process.
@@ -21,7 +20,6 @@ class Unicorn::HttpServer
   attr_reader :pid, :logger
   include Unicorn::SocketHelper
   include Unicorn::HttpResponse
-  include Unicorn::SSLServer
 
   # backwards compatibility with 1.x
   Worker = Unicorn::Worker
@@ -618,7 +616,6 @@ class Unicorn::HttpServer
     self.timeout /= 2.0 # halve it for select()
     @config = nil
     build_app! unless preload_app
-    ssl_enable!
     @after_fork = @listener_opts = @orig_app = nil
     readers = LISTENERS.dup
     readers << worker
diff --git a/lib/unicorn/ssl_client.rb b/lib/unicorn/ssl_client.rb
deleted file mode 100644
index a8c79e3..0000000
--- a/lib/unicorn/ssl_client.rb
+++ /dev/null
@@ -1,11 +0,0 @@
-# -*- encoding: binary -*-
-# :stopdoc:
-class Unicorn::SSLClient < Kgio::SSL
-  alias write kgio_write
-  alias close kgio_close
-
-  # this is no-op for now, to be fixed in kgio-monkey if people care
-  # about SSL support...
-  def shutdown(how = nil)
-  end
-end
diff --git a/lib/unicorn/ssl_configurator.rb b/lib/unicorn/ssl_configurator.rb
deleted file mode 100644
index 34f09ec..0000000
--- a/lib/unicorn/ssl_configurator.rb
+++ /dev/null
@@ -1,104 +0,0 @@
-# -*- encoding: binary -*-
-# :stopdoc:
-# This module is included in Unicorn::Configurator
-# :startdoc:
-#
-module Unicorn::SSLConfigurator
-  def ssl(&block)
-    ssl_require!
-    before = @set[:listeners].dup
-    opts = @set[:ssl_opts] = {}
-    yield
-    (@set[:listeners] - before).each do |address|
-      (@set[:listener_opts][address] ||= {})[:ssl_opts] = opts
-    end
-    ensure
-      @set.delete(:ssl_opts)
-  end
-
-  def ssl_certificate(file)
-    ssl_set(:ssl_certificate, file)
-  end
-
-  def ssl_certificate_key(file)
-    ssl_set(:ssl_certificate_key, file)
-  end
-
-  def ssl_client_certificate(file)
-    ssl_set(:ssl_client_certificate, file)
-  end
-
-  def ssl_dhparam(file)
-    ssl_set(:ssl_dhparam, file)
-  end
-
-  def ssl_ciphers(openssl_cipherlist_spec)
-    ssl_set(:ssl_ciphers, openssl_cipherlist_spec)
-  end
-
-  def ssl_crl(file)
-    ssl_set(:ssl_crl, file)
-  end
-
-  def ssl_prefer_server_ciphers(bool)
-    ssl_set(:ssl_prefer_server_ciphers, check_bool(bool))
-  end
-
-  def ssl_protocols(list)
-    ssl_set(:ssl_protocols, list)
-  end
-
-  def ssl_verify_client(on_off_optional)
-    ssl_set(:ssl_verify_client, on_off_optional)
-  end
-
-  def ssl_session_timeout(seconds)
-    ssl_set(:ssl_session_timeout, seconds)
-  end
-
-  def ssl_verify_depth(depth)
-    ssl_set(:ssl_verify_depth, depth)
-  end
-
-  # Allows specifying an engine for OpenSSL to use.  We have not been
-  # able to successfully test this feature due to a lack of hardware,
-  # Reports of success or patches to unicorn-public@bogomips.org is
-  # greatly appreciated.
-  def ssl_engine(engine)
-    ssl_warn_global(:ssl_engine)
-    ssl_require!
-    OpenSSL::Engine.load
-    OpenSSL::Engine.by_id(engine)
-    @set[:ssl_engine] = engine
-  end
-
-  def ssl_compression(bool)
-    # OpenSSL uses the SSL_OP_NO_COMPRESSION flag, Flipper follows suit
-    # with :ssl_no_compression, but we negate it to avoid exposing double
-    # negatives to the user.
-    ssl_set(:ssl_no_compression, check_bool(:ssl_compression, ! bool))
-  end
-
-private
-
-  def ssl_warn_global(func) # :nodoc:
-    Hash === @set[:ssl_opts] or return
-    warn("`#{func}' affects all SSL contexts in this process, " \
-         "not just this block")
-  end
-
-  def ssl_set(key, value) # :nodoc:
-    cur = @set[:ssl_opts]
-    Hash === cur or
-             raise ArgumentError, "#{key} must be called inside an `ssl' block"
-    cur[key] = value
-  end
-
-  def ssl_require! # :nodoc:
-    require "flipper"
-    require "unicorn/ssl_client"
-    rescue LoadError
-      warn "install 'kgio-monkey' for SSL support"
-      raise
-  end
-end
diff --git a/lib/unicorn/ssl_server.rb b/lib/unicorn/ssl_server.rb
deleted file mode 100644
index c00c3ae..0000000
--- a/lib/unicorn/ssl_server.rb
+++ /dev/null
@@ -1,42 +0,0 @@
-# -*- encoding: binary -*-
-# :stopdoc:
-# this module is meant to be included in Unicorn::HttpServer
-# It is an implementation detail and NOT meant for users.
-module Unicorn::SSLServer
-  attr_accessor :ssl_engine
-
-  def ssl_enable!
-    sni_hostnames = rack_sni_hostnames(@app)
-    seen = {} # we map a single SSLContext to multiple listeners
-    listener_ctx = {}
-    @listener_opts.each do |address, address_opts|
-      ssl_opts = address_opts[:ssl_opts] or next
-      listener_ctx[address] = seen[ssl_opts.object_id] ||= begin
-        unless sni_hostnames.empty?
-          ssl_opts = ssl_opts.dup
-          ssl_opts[:sni_hostnames] = sni_hostnames
-        end
-        ctx = Flipper.ssl_context(ssl_opts)
-        # FIXME: make configurable
-        ctx.session_cache_mode = OpenSSL::SSL::SSLContext::SESSION_CACHE_OFF
-        ctx
-      end
-    end
-    Unicorn::HttpServer::LISTENERS.each do |listener|
-      ctx = listener_ctx[sock_name(listener)] or next
-      listener.extend(Kgio::SSLServer)
-      listener.ssl_ctx = ctx
-      listener.kgio_ssl_class = Unicorn::SSLClient
-    end
-  end
-
-  # ugh, this depends on Rack internals...
-  def rack_sni_hostnames(rack_app) # :nodoc:
-    hostnames = {}
-    if Rack::URLMap === rack_app
-      mapping = rack_app.instance_variable_get(:@mapping)
-      mapping.each { |hostname,_,_,_| hostnames[hostname] = true }
-    end
-    hostnames.keys
-  end
-end