From 457c2bf135be68b3c49ff20d3f23a6f8507aeda5 Mon Sep 17 00:00:00 2001
From: elijah <elijah@riseup.net>
Date: Mon, 24 Dec 2012 02:02:24 -0800
Subject: initial commit

---
 lib/nickserver/hkp/fetch_key.rb | 51 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 lib/nickserver/hkp/fetch_key.rb

(limited to 'lib/nickserver/hkp/fetch_key.rb')

diff --git a/lib/nickserver/hkp/fetch_key.rb b/lib/nickserver/hkp/fetch_key.rb
new file mode 100644
index 0000000..c72ee11
--- /dev/null
+++ b/lib/nickserver/hkp/fetch_key.rb
@@ -0,0 +1,51 @@
+require 'em-http'
+
+module Nickserver; module HKP
+
+  class FetchKey
+    include EM::Deferrable
+
+    def get(uid)
+      FetchKeyInfo.new.search(uid).callback {|key_info_list|
+        best = pick_best_key(key_info_list)
+        get_key_by_fingerprint(best.keyid) {|key|
+          self.succeed key
+        }
+      }.errback {|msg|
+        self.fail msg
+      }
+      self
+    end
+
+    #
+    # fetches ascii armored OpenPGP public key from the keyserver
+    #
+    def get_key_by_fingerprint(key_id)
+      params = {:op => 'get', :search => "0x" + key_id, :exact => 'on', :options => 'mr'}
+      http = EventMachine::HttpRequest.new(Config.sks_url).get(:query => params)
+      http.callback {
+        if http.response_header.status != 200
+          self.fail http.response_header.status #"Request failed with #{http.response_header.status}: #{http.response}"
+        else
+          yield http.response
+        end
+      }
+      http.errback {
+        self.fail http.error
+      }
+    end
+
+    protected
+
+    #
+    # for now, just pick the newest key.
+    #
+    # in the future, we should perhaps pick the newest key
+    # that is signed by the oldest key.
+    #
+    def pick_best_key(key_info_list)
+      key_info_list.sort {|a,b| a.creationdate <=> b.creationdate}.last
+    end
+  end
+
+end; end
\ No newline at end of file
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