Class: ISO7816::Card::TCPCard

Inherits:
Card
  • Object
show all
Defined in:
lib/7816/card.rb

Overview

This implementation of card relies on socket communication, it expects an atr to be send on TCP connect

Constant Summary collapse

SLEEP_TIME = 
0.1

Instance Attribute Summary collapse

Attributes inherited from Card

#atr

Instance Method Summary collapse

Methods inherited from Card

#reconnect

Constructor Details

#initialize(addr = "127.0.0.1", port = 1024) ⇒ TCPCard

Returns a new instance of TCPCard.



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# File 'lib/7816/card.rb', line 175

def initialize addr="127.0.0.1", port=1024
  @addr = addr
  @port = port
end

Instance Attribute Details

#addr ⇒ Object

Returns the value of attribute addr.



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# File 'lib/7816/card.rb', line 174

def addr
  @addr
end

#port ⇒ Object

Returns the value of attribute port.



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# File 'lib/7816/card.rb', line 174

def port
  @port
end

Instance Method Details

#connect ⇒ Object 



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# File 'lib/7816/card.rb', line 180

def connect
  require 'socket'
  @socket = TCPSocket.new(@addr, @port)
  @connected = true
  
  sleep SLEEP_TIME 
  @atr = @socket.recv 1024,0 
  if block_given?
    yield self
    disconnect
  end
  @atr
end

#connected? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/7816/card.rb', line 201

def connected?
  return false unless @connected
  # we're still connected, check if peer is still available
  true
end

#disconnect ⇒ Object 



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# File 'lib/7816/card.rb', line 194

def disconnect
  @socket.close if @socket && @connected
  @connected = false
  @expect_sw=nil
  true
end

#in_range(byte, from, to) ⇒ Object 



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# File 'lib/7816/card.rb', line 226

def in_range byte, from, to
  byte >= from && byte <= to  
end

#receive(le = nil) ⇒ Object 



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# File 'lib/7816/card.rb', line 230

def receive le=nil
  raise "not connected" unless @connected
  
  if @expect_sw 
    le=2
    @expect_sw=nil
  end

  if le && Socket.const_defined?("MSG_WAITALL")
    # if we know the num bytes to receive, set MSG_WAIT_ALL
    flags = Socket::MSG_WAITALL
  elsif le
    data = ""
    data << @socket.recv(le, flags) while data.length < le
	return data
  else
    # set le to 1024 (default) and wait a little bit
    le = 1024
    sleep SLEEP_TIME
    flags = 0
  end

  #puts "Waiting to receive: #{le}"
  @socket.recv(le, flags)
end

#send(bytes, flags = 0) ⇒ Object 



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# File 'lib/7816/card.rb', line 207

def send bytes, flags=0
  raise "not connected" unless @connected
  bytes1 = bytes[0,5]
  bytes2 = bytes[5,bytes.length]
  @socket.send bytes1, flags
  # TCP2 echos back the ins byte, flags
  # according to ISO 7816-3 10.3.3
  proc_byte = @socket.recv 1, Socket::MSG_PEEK 
  # recv 90 60, INS, ...
  if proc_byte == "\x60" # null byte
    #
  elsif in_range(proc_byte, "\x61", "\x6f") || in_range(proc_byte, "\x90", "\x9f")
    @expect_sw=true
  else # INS being echoed back
    @socket.recv 1, 0
    @socket.send bytes2,flags
  end
end

#t0? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/7816/card.rb', line 256

def t0?
  true
end