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#!/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
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