Class: EMV::APDU::CPS::EXTERNAL_AUTHENTICATE

Inherits:
C_MAC_APDU show all
Defined in:
lib/emv/cps_apdu.rb

Instance Attribute Summary

Attributes inherited from C_MAC_APDU

#c_mac

Attributes inherited from CPS_APDU

#secure_context

Instance Method Summary collapse

Constructor Details

#initialize(card, secure_context) ⇒ EXTERNAL_AUTHENTICATE

Returns a new instance of EXTERNAL_AUTHENTICATE.



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# File 'lib/emv/cps_apdu.rb', line 191

def initialize card, secure_context
  super
  self.security_level= secure_context.level if secure_context.level
end

Instance Method Details

#cryptogram ⇒ Object

Sets the host cryptogram according to CPS 3.2.6.6



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# File 'lib/emv/cps_apdu.rb', line 219

def cryptogram 
  @cryptogram ||= secure_context.calculate_host_cryptogram
  @cryptogram
end

#cryptogram=(bytes) ⇒ Object

Explicitly set a cryptogram, e.g. if an incorrect cryptogram is to be set for testing.



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# File 'lib/emv/cps_apdu.rb', line 226

def cryptogram= bytes 
  @cryptogram= bytes
end

#security_level=(level) ⇒ Object

CPS 3.2.6

:enc_and_mac
:mac
:no_sec
or a sec level byte...



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# File 'lib/emv/cps_apdu.rb', line 202

def security_level= level
  case level
    when :enc_and_mac 
      self.p1= 0x03
    when :mac
      self.p1= 0x01
    when :no_sec
      self.p1= 0x00
    else
      self.p1=level  
  end
  @secure_context.level= level
end

#send(handle_more_data = true, card = nil) ⇒ Object 



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# File 'lib/emv/cps_apdu.rb', line 231

def send handle_more_data=true, card=nil
  @data=  self.cryptogram
  @data+= c_mac # calculate the c_mac...
  super
end