1 files changed, 28 insertions, 0 deletions
diff --git a/2.1/mail.rb b/2.1/mail.rb
new file mode 100755
index 0000000..7a71ffd
--- /dev/null
+++ b/2.1/mail.rb
@@ -0,0 +1,28 @@
+#!/usr/bin/env ruby
+
+require 'openssl'
+require 'securerandom'
+require 'sinatra'
+
+set :port, 4568
+
+Service = "Mail"
+ServicePassword = "{FvM<kgG}VpHxKJO;6Zo"
+
+def decrypt(ticket)
+  ticket = [ticket].pack("H*").unpack("C*").pack("c*")
+  cipher = OpenSSL::Cipher::AES.new(256, :CBC).decrypt
+  cipher.key = Digest::SHA2.digest(ServicePassword)
+  p = cipher.update(ticket) + cipher.final
+  p.split(?:)
+end
+
+post '/login' do
+  request.body.rewind
+  data = JSON.parse(request.body.read)
+  next "Invalid request\n" unless data.keys.sort == %w(ticket username)
+  un, sn = decrypt(data["ticket"])
+  next "Invalid ticket\n" unless sn == Service
+  next "Invalid ticket\n" unless un == data["username"]
+  "Login okay! You have no mail.\n"
+end