1 files changed, 9 insertions, 3 deletions
diff --git a/app/controllers/concerns/signature_verification.rb b/app/controllers/concerns/signature_verification.rb
index 4d77fa432..e5d5e2ca6 100644
--- a/app/controllers/concerns/signature_verification.rb
+++ b/app/controllers/concerns/signature_verification.rb
@@ -22,6 +22,12 @@ module SignatureVerification
       return
     end
 
+    if request.headers['Date'].present? && !matches_time_window?
+      @signature_verification_failure_reason = 'Signed request date outside acceptable time window'
+      @signed_request_account = nil
+      return
+    end
+
     raw_signature    = request.headers['Signature']
     signature_params = {}
 
@@ -76,7 +82,7 @@ module SignatureVerification
   def build_signed_string(signed_headers)
     signed_headers = 'date' if signed_headers.blank?
 
-    signed_headers.split(' ').map do |signed_header|
+    signed_headers.downcase.split(' ').map do |signed_header|
       if signed_header == Request::REQUEST_TARGET
         "#{Request::REQUEST_TARGET}: #{request.method.downcase} #{request.path}"
       elsif signed_header == 'digest'
@@ -89,12 +95,12 @@ module SignatureVerification
 
   def matches_time_window?
     begin
-      time_sent = DateTime.httpdate(request.headers['Date'])
+      time_sent = Time.httpdate(request.headers['Date'])
     rescue ArgumentError
       return false
     end
 
-    (Time.now.utc - time_sent).abs <= 30
+    (Time.now.utc - time_sent).abs <= 12.hours
   end
 
   def body_digest