HTTP signatures (#4146)

* Add Request class with HTTP signature generator

Spec: https://tools.ietf.org/html/draft-cavage-http-signatures-06

* Add HTTP signature verification concern

* Add test for SignatureVerification concern

* Add basic test for Request class

* Make PuSH subscribe/unsubscribe requests use new Request class

Accidentally fix lease_seconds not being set and sent properly, and
change the new minimum subscription duration to 1 day

* Make all PuSH workers use new Request class

* Make Salmon sender use new Request class

* Make FetchLinkService use new Request class

* Make FetchAtomService use the new Request class

* Make Remotable use the new Request class

* Make ResolveRemoteAccountService use the new Request class

* Add more tests

* Allow +-30 seconds window for signed request to remain valid

* Disable time window validation for signed requests, restore 7 days
as PuSH subscription duration (which was previous default due to a bug)

1 files changed, 1 insertions, 1 deletions

diff --git a/spec/workers/pubsubhubbub/confirmation_worker_spec.rb b/spec/workers/pubsubhubbub/confirmation_worker_spec.rb
index 1199d5801..8f66b4520 100644
--- a/spec/workers/pubsubhubbub/confirmation_worker_spec.rb
+++ b/spec/workers/pubsubhubbub/confirmation_worker_spec.rb
@@ -83,6 +83,6 @@ describe Pubsubhubbub::ConfirmationWorker do
   end
 
   def http_headers
-    { 'Connection' => 'close', 'Host' => 'example.com', 'User-Agent' => 'Mastodon/PubSubHubbub' }
+    { 'Connection' => 'close', 'Host' => 'example.com', 'User-Agent' => 'http.rb/2.2.2 (Mastodon/1.4.7; +https://cb6e6126.ngrok.io/)' }
   end
 end