Improve Friendica support (but still not there yet)

Gemfile.lock

@@ -107,7 +107,7 @@ GEM
       ruby-progressbar (~> 1.4)
     globalid (0.3.7)
       activesupport (>= 4.1.0)
-    goldfinger (1.0.5)
+    goldfinger (1.1.0)
       addressable (~> 2.4)
       http (~> 2.0)
       nokogiri (~> 1.6)
@@ -172,7 +172,7 @@ GEM
       mini_portile2 (~> 2.1.0)
     oj (2.17.3)
     orm_adapter (0.5.0)
-    ostatus2 (0.3.2)
+    ostatus2 (1.0.1)
       addressable (~> 2.4)
       http (~> 2.0)
       nokogiri (~> 1.6)

app/services/follow_remote_account_service.rb

@@ -1,4 +1,6 @@
 class FollowRemoteAccountService < BaseService
+  include OStatus2::MagicKey
+
   # Find or create a local account for a remote user.
   # When creating, look up the user's webfinger and fetch all
   # important information from their feed
@@ -57,17 +59,6 @@ class FollowRemoteAccountService < BaseService
     update_remote_profile_service.call(author, account)
   end
 
-  def magic_key_to_pem(magic_key)
-    _, modulus, exponent = magic_key.split('.')
-    modulus, exponent = [modulus, exponent].map { |n| Base64.urlsafe_decode64(n).bytes.inject(0) { |a, e| (a << 8) | e } }
-
-    key   = OpenSSL::PKey::RSA.new
-    key.n = modulus
-    key.e = exponent
-
-    key.to_pem
-  end
-
   def update_remote_profile_service
     @update_remote_profile_service ||= UpdateRemoteProfileService.new
   end