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#!/usr/bin/env ruby
require 'net/http'
require 'uri'
require 'json'
def get_ticket(un, tgt, sv)
uri = URI.parse("http://localhost:4567/ticket")
header = {'Content-Type': 'text/json'}
login = {
"username": un,
"ticket": tgt,
"service": sv
}
http = Net::HTTP.new(uri.host, uri.port)
request = Net::HTTP::Post.new(uri.request_uri, header)
request.body = login.to_json
response = http.request(request)
response.body
end
def ticket_valid?(ticket)
now = Time.now.to_i
timeStart = ticket["timestamp"]
timeEnd = ticket["timestamp"] + ticket["lifespan"]
now >= timeStart && now < timeEnd
end
def update_keytab!
File.open(".keytab", "w") do |f|
f.puts Tickets.map { |s, p| [s, *p.values].join(?:) }
end
end
print "Username: "; un = gets.strip
print "Mailserver: "; ms = gets.strip
unless File.exist?(".keytab")
puts "No keytab, please kinit"
exit 1
end
Tickets = File.readlines(".keytab").map { |l|
a = l.strip.split(?:)
[a[0], {
"lifespan" => a[1].to_i,
"timestamp" => a[2].to_i,
"ticket" => a[3]
}]
}.to_h
unless Tickets.keys.include?(ms) && ticket_valid?(Tickets[ms])
if Tickets.keys.include?("_TGS") && ticket_valid?(Tickets["_TGS"])
packet = get_ticket(un, Tickets["_TGS"]["ticket"], ms).split(?:)
Tickets[ms] = {
"lifespan" => packet[0].to_i,
"timestamp" => packet[1].to_i,
"ticket" => packet[2]
}
update_keytab!
else
puts "No Ticket Granting Ticket, please kinit"
exit 1
end
end
ticket = Tickets[ms]["ticket"]
uri = URI.parse("http://localhost:4568/login")
header = {'Content-Type': 'text/json'}
login = {
"username": un,
"ticket": ticket
}
http = Net::HTTP.new(uri.host, uri.port)
request = Net::HTTP::Post.new(uri.request_uri, header)
request.body = login.to_json
response = http.request(request)
puts response.body
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