From 8a81429f0eb8aa5041d47557d0c5b5359bb959e6 Mon Sep 17 00:00:00 2001
From: Azul <azul@riseup.net>
Date: Wed, 25 May 2016 13:13:30 +0200
Subject: copy over all files from rewritten attempt

I started a nickserver from scratch to implement the things that are independent of our choice of stack (eventmachine or other).

This commit copies them over and tests both things in parallel.
---
 lib/nickserver/adapters.rb             |  4 ++
 lib/nickserver/adapters/couch_db.rb    | 12 +++++
 lib/nickserver/adapters/local.rb       |  8 +++
 lib/nickserver/adapters/remote.rb      |  4 ++
 lib/nickserver/couch_db.rb             |  4 ++
 lib/nickserver/couch_db/response.rb    | 51 ++++++++++++++++++
 lib/nickserver/couch_db/source.rb      | 34 ++++++++++++
 lib/nickserver/hkp.rb                  |  4 ++
 lib/nickserver/hkp/fetch_key.rb        |  2 +-
 lib/nickserver/hkp/fetch_key_info.rb   |  2 +-
 lib/nickserver/hkp/key_info.rb         |  2 +-
 lib/nickserver/hkp/parse_key_info.rb   |  4 +-
 lib/nickserver/hkp/v_index_response.rb | 96 ++++++++++++++++++++++++++++++++++
 lib/nickserver/invalid_source.rb       | 14 +++++
 lib/nickserver/lookup.rb               | 31 +++++++++++
 lib/nickserver/nickname.rb             | 51 ++++++++++++++++++
 lib/nickserver/response.rb             | 15 ++++++
 lib/nickserver/server.rb               |  2 +-
 lib/server.rb                          | 19 +++++++
 19 files changed, 353 insertions(+), 6 deletions(-)
 create mode 100644 lib/nickserver/adapters.rb
 create mode 100644 lib/nickserver/adapters/couch_db.rb
 create mode 100644 lib/nickserver/adapters/local.rb
 create mode 100644 lib/nickserver/adapters/remote.rb
 create mode 100644 lib/nickserver/couch_db.rb
 create mode 100644 lib/nickserver/couch_db/response.rb
 create mode 100644 lib/nickserver/couch_db/source.rb
 create mode 100644 lib/nickserver/hkp.rb
 create mode 100644 lib/nickserver/hkp/v_index_response.rb
 create mode 100644 lib/nickserver/invalid_source.rb
 create mode 100644 lib/nickserver/lookup.rb
 create mode 100644 lib/nickserver/nickname.rb
 create mode 100644 lib/nickserver/response.rb
 create mode 100644 lib/server.rb

(limited to 'lib')

diff --git a/lib/nickserver/adapters.rb b/lib/nickserver/adapters.rb
new file mode 100644
index 0000000..c87cb63
--- /dev/null
+++ b/lib/nickserver/adapters.rb
@@ -0,0 +1,4 @@
+module Nickserver
+  module Adapters
+  end
+end
diff --git a/lib/nickserver/adapters/couch_db.rb b/lib/nickserver/adapters/couch_db.rb
new file mode 100644
index 0000000..e8a23ad
--- /dev/null
+++ b/lib/nickserver/adapters/couch_db.rb
@@ -0,0 +1,12 @@
+require 'nickserver/adapters'
+
+class Nickserver::Adapters::CouchDB
+
+
+  protected
+
+  def query_couch(nick)
+    yield 404, "{}"
+  end
+
+end
diff --git a/lib/nickserver/adapters/local.rb b/lib/nickserver/adapters/local.rb
new file mode 100644
index 0000000..d6210c3
--- /dev/null
+++ b/lib/nickserver/adapters/local.rb
@@ -0,0 +1,8 @@
+require 'nickserver/adapters'
+
+class Nickserver::Adapters::Local
+
+  def query(nick)
+  end
+
+end
diff --git a/lib/nickserver/adapters/remote.rb b/lib/nickserver/adapters/remote.rb
new file mode 100644
index 0000000..e12bd26
--- /dev/null
+++ b/lib/nickserver/adapters/remote.rb
@@ -0,0 +1,4 @@
+require 'nickserver/adapters'
+
+class Nickserver::Adapters::Remote
+end
diff --git a/lib/nickserver/couch_db.rb b/lib/nickserver/couch_db.rb
new file mode 100644
index 0000000..5c63fc1
--- /dev/null
+++ b/lib/nickserver/couch_db.rb
@@ -0,0 +1,4 @@
+module Nickserver
+  module CouchDB
+  end
+end
diff --git a/lib/nickserver/couch_db/response.rb b/lib/nickserver/couch_db/response.rb
new file mode 100644
index 0000000..c6afe03
--- /dev/null
+++ b/lib/nickserver/couch_db/response.rb
@@ -0,0 +1,51 @@
+require 'nickserver/couch_db'
+require 'json'
+
+module Nickserver::CouchDB
+  class Response
+
+    def initialize(nick, couch_response = {})
+      @nick = nick
+      @couch_status = couch_response[:status]
+      @json = JSON.load(couch_response[:body]) if couch_status == 200
+    end
+
+    def status
+      if ok? && empty? then 404
+      else couch_status
+      end
+    end
+
+    def content
+      key_response if ok? && !empty?
+    end
+
+    protected
+
+    def key_response
+      format address: nick.to_s, openpgp: key
+    end
+
+    def format(response)
+      response.to_json
+    end
+
+    def key
+      rows.first["value"]
+    end
+
+    def ok?
+      couch_status == 200
+    end
+
+    def empty?
+      rows.empty?
+    end
+
+    def rows
+      json["rows"]
+    end
+
+    attr_reader :couch_status, :json, :nick
+  end
+end
diff --git a/lib/nickserver/couch_db/source.rb b/lib/nickserver/couch_db/source.rb
new file mode 100644
index 0000000..fffa76e
--- /dev/null
+++ b/lib/nickserver/couch_db/source.rb
@@ -0,0 +1,34 @@
+#
+# This class allows querying couch for public keys.
+#
+require 'nickserver/couch_db/response'
+
+module Nickserver::CouchDB
+  class Source
+
+    VIEW = '/_design/Identity/_view/pgp_key_by_email'
+
+    def initialize(adapter)
+      @adapter = adapter
+    end
+
+    def query(nick)
+      adapter.get VIEW, query: query_for(nick) do |status, body|
+        yield Response.new nick, status: status, body: body
+      end
+    end
+
+    protected
+
+    def query_for(nick)
+      { reduce: "false", key: "\"#{nick}\"" }
+    end
+
+    def adapter
+      @adapter
+      # Nickserver::Adapters::Http.new(config)
+    end
+
+    attr_reader :config
+  end
+end
diff --git a/lib/nickserver/hkp.rb b/lib/nickserver/hkp.rb
new file mode 100644
index 0000000..bb82a20
--- /dev/null
+++ b/lib/nickserver/hkp.rb
@@ -0,0 +1,4 @@
+module Nickserver
+  module Hkp
+  end
+end
diff --git a/lib/nickserver/hkp/fetch_key.rb b/lib/nickserver/hkp/fetch_key.rb
index 44621d3..55eeefa 100644
--- a/lib/nickserver/hkp/fetch_key.rb
+++ b/lib/nickserver/hkp/fetch_key.rb
@@ -5,7 +5,7 @@ require 'em-http'
 # http://tools.ietf.org/html/draft-shaw-openpgp-hkp-00
 #
 
-module Nickserver; module HKP
+module Nickserver; module Hkp
 
   class FetchKey
     include EM::Deferrable
diff --git a/lib/nickserver/hkp/fetch_key_info.rb b/lib/nickserver/hkp/fetch_key_info.rb
index 2448bb1..b7481d0 100644
--- a/lib/nickserver/hkp/fetch_key_info.rb
+++ b/lib/nickserver/hkp/fetch_key_info.rb
@@ -4,7 +4,7 @@ require 'em-http'
 # used to fetch an array of KeyInfo objects that match the given uid.
 #
 
-module Nickserver; module HKP
+module Nickserver; module Hkp
   class FetchKeyInfo
     include EM::Deferrable
 
diff --git a/lib/nickserver/hkp/key_info.rb b/lib/nickserver/hkp/key_info.rb
index adb75d8..dc0443c 100644
--- a/lib/nickserver/hkp/key_info.rb
+++ b/lib/nickserver/hkp/key_info.rb
@@ -9,7 +9,7 @@ require 'cgi'
 # format definition of machine readable index output is here:
 # http://tools.ietf.org/html/draft-shaw-openpgp-hkp-00#section-5.2
 #
-module Nickserver; module HKP
+module Nickserver; module Hkp
   class KeyInfo
     attr_accessor :uids, :keyid, :algo, :keylen, :creationdate, :expirationdate, :flags
 
diff --git a/lib/nickserver/hkp/parse_key_info.rb b/lib/nickserver/hkp/parse_key_info.rb
index 8934829..d8abe4f 100644
--- a/lib/nickserver/hkp/parse_key_info.rb
+++ b/lib/nickserver/hkp/parse_key_info.rb
@@ -1,11 +1,11 @@
 #
-# Simple parser for HKP KeyInfo responses.
+# Simple parser for Hkp KeyInfo responses.
 #
 # Focus is on simple here. Trying to avoid state and sideeffects.
 # Parsing a response with 12 keys and validating them takes 2ms.
 # So no need for memoization and making things more complex.
 #
-module Nickserver; module HKP
+module Nickserver; module Hkp
   class ParseKeyInfo
 
     # for this regexp to work, the source text must end in a trailing "\n",
diff --git a/lib/nickserver/hkp/v_index_response.rb b/lib/nickserver/hkp/v_index_response.rb
new file mode 100644
index 0000000..865d476
--- /dev/null
+++ b/lib/nickserver/hkp/v_index_response.rb
@@ -0,0 +1,96 @@
+require 'nickserver/hkp'
+require 'nickserver/hkp/key_info'
+
+#
+# Simple parser for Hkp KeyInfo responses.
+#
+# Focus is on simple here. Trying to avoid state and sideeffects.
+# Parsing a response with 12 keys and validating them takes 2ms.
+# So no need for memoization and making things more complex.
+module Nickserver::Hkp
+  class VIndexResponse
+
+    # for this regexp to work, the source text must end in a trailing "\n",
+    # which the output of sks does.
+    MATCH_PUB_KEY = /(^pub:.+?\n(^uid:.+?\n)+)/m
+
+    #  hkp_response -- raw output from a vindex hkp query (machine readable)
+    def initialize(nick, hkp_response)
+      @nick = nick.to_s
+      @vindex_result = hkp_response[:body]
+    end
+
+    def status
+      if keys.empty?
+        error_status
+      else
+        200
+      end
+    end
+
+    def keys
+      key_infos.reject { |key| error_for_key(key) }
+    end
+
+    def msg
+      if errors.any?
+        error_messages.join "\n"
+      else
+        "Could not fetch keyinfo."
+      end
+    end
+
+    protected
+
+    attr_reader :vindex_result, :nick
+
+    def error_status
+      if errors.any?
+        500
+      else
+        404
+      end
+    end
+
+    def errors
+      key_infos.map{|key| error_for_key(key) }.compact
+    end
+
+    def error_messages
+      key_infos.map do |key|
+        err = error_for_key(key)
+        error_message(key, err)
+      end.compact
+    end
+
+    def key_infos
+      all_key_infos.select do |key_info|
+        key_info.uids.include?(nick)
+      end
+    end
+
+    def all_key_infos
+      @all_key_infos ||= vindex_result.scan(MATCH_PUB_KEY).map do |match|
+        KeyInfo.new(match[0])
+      end
+    end
+
+    def error_message(key, err)
+      "Ignoring key #{key.keyid} for #{nick}: #{err}" if err
+    end
+
+    def error_for_key(key)
+      if key.keylen < 2048
+        "key length is too short."
+      elsif key.expired?
+        "key expired."
+      elsif key.revoked?
+        "key revoked."
+      elsif key.disabled?
+        "key disabled."
+      elsif key.expirationdate && key.expirationdate < Time.now
+        "key expired"
+      end
+    end
+  end
+end
diff --git a/lib/nickserver/invalid_source.rb b/lib/nickserver/invalid_source.rb
new file mode 100644
index 0000000..dac245a
--- /dev/null
+++ b/lib/nickserver/invalid_source.rb
@@ -0,0 +1,14 @@
+#
+# This is a dummy source for invalid queries.
+# It simply always returns 500 and "Not a valid address"
+#
+
+module Nickserver
+  class InvalidSource
+
+    def query(nick)
+      yield 500, "Not a valid address"
+    end
+
+  end
+end
diff --git a/lib/nickserver/lookup.rb b/lib/nickserver/lookup.rb
new file mode 100644
index 0000000..105e77e
--- /dev/null
+++ b/lib/nickserver/lookup.rb
@@ -0,0 +1,31 @@
+require 'nickserver/invalid_source'
+
+module Nickserver
+  class Lookup
+
+    attr_reader :nick
+
+    def initialize(nick)
+      @nick = nick
+    end
+
+    def respond_with(responder)
+      query do |status, content|
+        responder.send_response status: status, content: content
+      end
+    end
+
+    protected
+
+    def query(&block)
+      source.query nick, &block
+    end
+
+    def source
+      if nick.invalid?  then Nickserver::InvalidSource
+      elsif nick.local? then Nickserver::Config.local_source
+      else Nickserver::Config.remote_source
+      end
+    end
+  end
+end
diff --git a/lib/nickserver/nickname.rb b/lib/nickserver/nickname.rb
new file mode 100644
index 0000000..938d4a4
--- /dev/null
+++ b/lib/nickserver/nickname.rb
@@ -0,0 +1,51 @@
+module Nickserver
+  class Nickname
+
+    EmailAddress = begin
+                     qtext = '[^\\x0d\\x22\\x5c\\x80-\\xff]'
+                     dtext = '[^\\x0d\\x5b-\\x5d\\x80-\\xff]'
+                     atom = '[^\\x00-\\x20\\x22\\x28\\x29\\x2c\\x2e\\x3a-\\x3c\\x3e\\x40\\x5b-\\x5d\\x7f-\\xff]+'
+                     quoted_pair = '\\x5c[\\x00-\\x7f]'
+                     domain_literal = "\\x5b(?:#{dtext}|#{quoted_pair})*\\x5d"
+                     quoted_string = "\\x22(?:#{qtext}|#{quoted_pair})*\\x22"
+                     domain_ref = atom
+                     sub_domain = "(?:#{domain_ref}|#{domain_literal})"
+                     word = "(?:#{atom}|#{quoted_string})"
+                     domain = "#{sub_domain}(?:\\x2e#{sub_domain})*"
+                     local_part = "#{word}(?:\\x2e#{word})*"
+                     addr_spec = "#{local_part}\\x40#{domain}"
+                     /\A#{addr_spec}\z/n
+                   end
+
+    LOCAL_DOMAIN = 'test.me'
+
+    def initialize(address)
+      @address = address.to_s
+    end
+
+    def valid?
+      address =~ EmailAddress
+    end
+
+    def invalid?
+      !valid?
+    end
+
+    def local?
+      address.end_with? LOCAL_DOMAIN
+    end
+
+    def remote?
+      !local?
+    end
+
+    def to_s
+      address
+    end
+
+    protected
+
+    attr_reader :address
+
+  end
+end
diff --git a/lib/nickserver/response.rb b/lib/nickserver/response.rb
new file mode 100644
index 0000000..c55d359
--- /dev/null
+++ b/lib/nickserver/response.rb
@@ -0,0 +1,15 @@
+module Nickserver
+  class Response
+
+    attr_reader :status, :message
+
+    def initialize(status, message)
+      @status = status
+      @message = message
+    end
+
+    def content
+      "#{status} #{message}"
+    end
+  end
+end
diff --git a/lib/nickserver/server.rb b/lib/nickserver/server.rb
index 32afdae..8329406 100644
--- a/lib/nickserver/server.rb
+++ b/lib/nickserver/server.rb
@@ -90,7 +90,7 @@ module Nickserver
       fetcher = if local_address?(uid)
         Nickserver::Couch::FetchKey.new
       else
-        Nickserver::HKP::FetchKey.new
+        Nickserver::Hkp::FetchKey.new
       end
       fetcher.get(uid).callback {|key|
         yield key
diff --git a/lib/server.rb b/lib/server.rb
new file mode 100644
index 0000000..4e7cf51
--- /dev/null
+++ b/lib/server.rb
@@ -0,0 +1,19 @@
+class Server
+
+  def process_http_request
+    lookup.respond_with(Responder)
+  end
+
+  def lookup
+    LookupFactory.lookup_for(nick)
+  end
+
+  def nick
+    Nickname.new(request.address)
+  end
+
+  def request
+    Request.new(params)
+  end
+
+end
-- 
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