add a default certificate for the fast server

script/generate_initial_config.rb

@@ -26,3 +26,22 @@ unless File.exists?(Postal.signing_key_path)
   File.open(Postal.signing_key_path, 'w') { |f| f.write(key) }
   puts "Created new signing key for DKIM & HTTP requests"
 end
+
+unless File.exists?(Postal.fast_server_default_private_key_path)
+  key = OpenSSL::PKey::RSA.new(2048).to_s
+  File.open(Postal.fast_server_default_private_key_path, 'w') { |f| f.write(key) }
+  puts "Created new private key for default fast server TLS connections"
+end
+
+unless File.exist?(Postal.fast_server_default_certificate_path)
+  cert = OpenSSL::X509::Certificate.new
+  cert.subject = cert.issuer = OpenSSL::X509::Name.parse("/C=GB/O=Default/OU=Default/CN=default")
+  cert.not_before = Time.now
+  cert.not_after = Time.now + (365 * 24 * 60 * 60) * 10
+  cert.public_key = Postal.fast_server_default_private_key.public_key
+  cert.serial = 0x0
+  cert.version = 2
+  cert.sign Postal.fast_server_default_private_key, OpenSSL::Digest::SHA256.new
+  File.open(Postal.fast_server_default_certificate_path, 'w') { |f| f.write(cert.to_pem) }
+  puts "Created new self signed certificate for default fast server TLS connections"
+end