[FEATURE] fetch key by fingerprint

- add fingerprint unit tests
- add integration test
- implement by_fingerprint

5 files changed, 51 insertions, 22 deletions

diff --git a/lib/nickserver/hkp/client.rb b/lib/nickserver/hkp/client.rb
index 1fbe7a2..d53daad 100644
--- a/lib/nickserver/hkp/client.rb
+++ b/lib/nickserver/hkp/client.rb
@@ -27,8 +27,8 @@ module Nickserver; module Hkp
     #
     # fetches ascii armored OpenPGP public key from the keyserver
     #
-    def get_key_by_fingerprint(fingerprint, &block)
-      get op: 'get', search: "0x" + fingerprint, &block
+    def get_key_by_fingerprint(fingerprint)
+      get op: 'get', search: "0x" + fingerprint
     end
 
     protected
diff --git a/lib/nickserver/hkp/source.rb b/lib/nickserver/hkp/source.rb
index 0d79856..e104aa8 100644
--- a/lib/nickserver/hkp/source.rb
+++ b/lib/nickserver/hkp/source.rb
@@ -18,7 +18,7 @@ module Nickserver; module Hkp
       status, response = search(nick)
       if status == 200
         best = pick_best_key(response)
-        get_key_by_fingerprint(nick, best.keyid)
+        get_key_by_fingerprint(best.keyid, nick)
       else
         Nickserver::Response.new(status, response)
       end
@@ -30,6 +30,15 @@ module Nickserver; module Hkp
       return parser.status_for(nick), parser.response_for(nick)
     end
 
+    def get_key_by_fingerprint(fingerprint, nick = nil)
+      status, response = client.get_key_by_fingerprint fingerprint
+      if status == 200
+        Response.new nick, response
+      else
+        Nickserver::Response.new status, "HKP Request failed"
+      end
+    end
+
     protected
 
     #
@@ -42,15 +51,6 @@ module Nickserver; module Hkp
       key_info_list.sort {|a,b| a.creationdate <=> b.creationdate}.last
     end
 
-    def get_key_by_fingerprint(nick, fingerprint)
-      status, response = client.get_key_by_fingerprint fingerprint
-      if status == 200
-        Response.new nick, response
-      else
-        Nickserver::Response.new status, "HKP Request failed"
-      end
-    end
-
     def client
       @client ||= Client.new(adapter)
     end
diff --git a/lib/nickserver/request_handler.rb b/lib/nickserver/request_handler.rb
index bc6d519..856ec5d 100644
--- a/lib/nickserver/request_handler.rb
+++ b/lib/nickserver/request_handler.rb
@@ -13,7 +13,7 @@ module Nickserver
       if params && params["address"] && params["address"].any?
         by_email(params, headers)
       elsif params && params["fingerprint"] && params["fingerprint"].any?
-        # do something else
+        by_fingerprint(params)
       else
         send_not_found
       end
@@ -35,7 +35,16 @@ module Nickserver
       end
     end
 
-    #def by_fingerprint(params)
+    def by_fingerprint(params)
+      fingerprint = params["fingerprint"].first
+      if fingerprint.length == 40 && !fingerprint[/\H/]
+        source = Nickserver::Hkp::Source.new(adapter)
+        key_response = source.get_key_by_fingerprint(fingerprint)
+        send_response key_response.status, key_response.content
+      else
+        send_error('Fingerprint invalid: ' + fingerprint)
+      end
+    end
 
     def send_key(email, headers)
       if local_address?(email, headers)
diff --git a/test/integration/nickserver_test.rb b/test/integration/nickserver_test.rb
index 710c3a1..9aac6b4 100644
--- a/test/integration/nickserver_test.rb
+++ b/test/integration/nickserver_test.rb
@@ -26,7 +26,7 @@ class NickserverTest < Minitest::Test
     super
   end
 
-  def test_GET_served_via_SKS
+  def test_GET_key_by_email_address_served_via_SKS
     uid    = 'cloudadmin@leap.se'
     key_id = 'E818C478D3141282F7590D29D041EB11B1647490'
     stub_sks_vindex_reponse(uid, body: file_content(:leap_vindex_result))
@@ -40,15 +40,13 @@ class NickserverTest < Minitest::Test
     end
   end
 
-  def test_POST_served_via_SKS
-    uid    = 'cloudadmin@leap.se'
-    key_id = 'E818C478D3141282F7590D29D041EB11B1647490'
-    stub_sks_vindex_reponse(uid, body: file_content(:leap_vindex_result))
-    stub_sks_get_reponse(key_id, body: file_content(:leap_public_key))
+  def test_GET_key_by_fingerprint_served_via_SKS
+    fingerprint = 'E818C478D3141282F7590D29D041EB11B1647490'
+    stub_sks_get_reponse(fingerprint, body: file_content(:leap_public_key))
 
     start do
-      params = {body: {"address" => uid}}
-      post(params) do |response|
+      params = {query: {"fingerprint" => fingerprint}}
+      get(params) do |response|
         assert_equal file_content(:leap_public_key), JSON.parse(response.to_s)["openpgp"]
       end
     end
diff --git a/test/unit/request_handler_test.rb b/test/unit/request_handler_test.rb
index 11cc59b..420e74b 100644
--- a/test/unit/request_handler_test.rb
+++ b/test/unit/request_handler_test.rb
@@ -27,6 +27,28 @@ class Nickserver::RequestHandlerTest < Minitest::Test
     end
    end
 
+  def test_fingerprint_to_short
+    handle fingerprint: ['44F2F455E28']
+    assert_response status: 500, content: "500 Fingerprint invalid: 44F2F455E28\n"
+  end
+
+  def test_fingerprint_is_not_hex
+    handle fingerprint: ['X36E738D69173C13Z709E44F2F455E2824D18DDX']
+    assert_response status: 500,
+      content: "500 Fingerprint invalid: X36E738D69173C13Z709E44F2F455E2824D18DDX\n"
+  end
+
+  def test_get_key_with_fingerprint_from_hkp
+    handle fingerprint: ['E36E738D69173C13D709E44F2F455E2824D18DDF']
+    source = Minitest::Mock.new
+    source.expect :get_key_by_fingerprint,
+      Nickserver::Response.new(200, "fake fingerprint"),
+      ['E36E738D69173C13D709E44F2F455E2824D18DDF']
+    Nickserver::Hkp::Source.stub :new, source do
+      assert_response status: 200, content: "200 fake fingerprint"
+    end
+  end
+
   protected
 
   def handle(params = {})