Commit 51f4416

@@ -34,7 +34,8 @@ class SamlResponse
         Destination: request.acs_url,
         InResponseTo: request.id,
       }
-      xml.tag! "samlp:Response", options do |response|
+      xml.tag!("samlp:Response", options) do
+        xml.tag!('saml:Issuer', configuration.issuer)
       end
       xml.target!
     end
@@ -42,5 +43,11 @@ class SamlResponse
     def build
       SamlResponse.new(to_xml)
     end
+
+    private
+
+    def configuration
+      Rails.configuration.x
+    end
   end
 end

@@ -0,0 +1,1 @@
+Rails.application.config.x.issuer = ENV['ISSUER']

@@ -6,6 +6,7 @@ describe SamlResponse do
     let(:user) { double(:user) }
     let(:request) { double(id: SecureRandom.uuid, acs_url: acs_url) }
     let(:acs_url) { "https://#{FFaker::Internet.domain_name}/acs" }
+    let(:issuer) { FFaker::Movie.title }
 
     <<-XML
 <samlp:Response 
@@ -55,6 +56,7 @@ describe SamlResponse do
     XML
     it 'returns a proper response for the user' do
       travel_to 1.second.from_now
+      allow(Rails.configuration.x).to receive(:issuer).and_return(issuer)
       result = subject.for(user, request).to_xml
       hash = Hash.from_xml(result)
 
@@ -63,6 +65,7 @@ describe SamlResponse do
       expect(hash['Response']['IssueInstant']).to eql(Time.now.utc.iso8601)
       expect(hash['Response']['Destination']).to eql(acs_url)
       expect(hash['Response']['InResponseTo']).to eql(request.id)
+      expect(hash['Response']['Issuer']).to eql(issuer)
     end
   end
 end

@@ -0,0 +1,1 @@
+ISSUER=proof.dev

@@ -56,3 +56,4 @@ end
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
 gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
+gem 'dotenv-rails'

@@ -66,6 +66,10 @@ GEM
       safe_yaml (~> 1.0.0)
     crass (1.0.2)
     diff-lcs (1.3)
+    dotenv (2.2.1)
+    dotenv-rails (2.2.1)
+      dotenv (= 2.2.1)
+      railties (>= 3.2, < 5.2)
     erubi (1.7.0)
     execjs (2.7.0)
     ffaker (2.7.0)
@@ -214,6 +218,7 @@ DEPENDENCIES
   byebug
   capybara (~> 2.13)
   coffee-rails (~> 4.2)
+  dotenv-rails
   ffaker
   jbuilder (~> 2.5)
   listen (>= 3.0.5, < 3.2)