Module: Tem::SeClosures

Includes:
MixedMethods
Included in:
Session
Defined in:
lib/tem/seclosures.rb

Defined Under Namespace

Modules: MixedMethods

Class Method Summary collapse

Instance Method Summary collapse

Methods included from MixedMethods

#assemble

Class Method Details

.included(klass) ⇒ Object 



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# File 'lib/tem/seclosures.rb', line 11

def self.included(klass)
  klass.extend MixedMethods
end

Instance Method Details

#execute(secpack, key_id = 0) ⇒ Object 



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# File 'lib/tem/seclosures.rb', line 37

def execute(secpack, key_id = 0)
  # load SECpack
  buffer_id = post_buffer(secpack.tem_formatted_body)
  response = @transport.iso_apdu! :ins => 0x50, :p1 => buffer_id,
                                                   :p2 => key_id
  tem_secpack_error(response) if read_tem_byte(response, 0) != 1
  
  # execute SEC
  sec_exception = nil
  loop do 
    response = @transport.iso_apdu! :ins => 0x52
    sec_status = read_tem_byte(response, 0)
    case sec_status
    when 2 # success
      break
    when 3 # exception
      # there is an exception, try to collect the trace
      b_stat = stat_buffers() rescue nil
      k_stat = stat_keys() rescue nil
      trace = sec_trace()
      sec_exception = Tem::SecExecError.new secpack, trace, b_stat, k_stat
      break
    when 4 # persistent store fault
      solve_psfault
    else
      raise "Unrecognized execution engine status #{sec_status}"
    end
  end

  # unbind SEC
  response = @transport.iso_apdu! :ins => 0x51
  raise sec_exception if sec_exception
  buffer_id = read_tem_byte(response, 0)
  buffer_length = read_tem_short(response, 1)
  data_buffer = read_buffer buffer_id
  release_buffer buffer_id
  
  return data_buffer[0...buffer_length]
end

#sec_trace ⇒ Object 



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# File 'lib/tem/seclosures.rb', line 15

def sec_trace
  #begin      
    trace = @transport.iso_apdu! :ins => 0x54
    if trace.length > 2
      case read_tem_short(trace, 0) # trace version
      when 1
        return {:sp => read_tem_short(trace, 2), :ip => read_tem_short(trace, 4),
                :out => read_tem_short(trace, 6), :pscell =>  read_tem_short(trace, 8)}
      end        
    end
    return nil # unreadable trace
  #rescue
  #  return nil
  #end
end

#solve_psfault ⇒ Object 



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# File 'lib/tem/seclosures.rb', line 31

def solve_psfault
  # TODO: better strategy, lol
  next_cell = rand(16)
  @transport.iso_apdu! :ins => 0x53, :p12 => to_tem_ushort(next_cell)
end