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require 'gssapi'
require 'base64'
require 'socket'
host = 'example.org'
service = 'host'
sock = TCPSocket.new(host, 8082)
cli = GSSAPI::Simple.new(host, service)
tok = cli.init_context
stok = Base64.strict_encode64(tok)
sock.write("#{stok}\n") # send initial token
stok = sock.gets.chomp # get back continuation token
ctx = cli.init_context(Base64.strict_decode64(stok.chomp)) # complete security context
puts "Connection #{(ctx ? 'succeeded' : 'failed')}"
begin
print "> "
msg = STDIN.gets.chomp
emsg = cli.wrap_message(msg)
sock.write("#{Base64.strict_encode64(emsg)}\n")
end while msg != 'exit'
sock.close
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