Class: CcipherBox::BinStruct

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/ccipher_box/bin_struct.rb

Instance Method Summary collapse

Instance Method Details

#find_struct(buf, &block) ⇒ Object 



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# File 'lib/ccipher_box/bin_struct.rb', line 25

def find_struct(buf, &block)

  cpos = buf.pos

  begin

    #len = find_asn1_length(buf.string)
    len = Ccrypto::ASN1.engine.asn1_length(buf.bytes)
    #logger.debug "Found meta length : #{len}" if not logger.nil?
    raise InsufficientData if len == 0

    buf.rewind
    meta = buf.read(len)

    if block
      block.call(meta, buf.read(cpos-len))
    else
      meta
    end

    #rescue OpenSSL::ASN1::ASN1Error => ex
  rescue Ccrypto::ASN1EngineException => ex
    logger.error ex
    buf.seek(cpos)
    raise InsufficientData
  end
  
end

#struct(key, ver = "1.0") ⇒ Object 



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# File 'lib/ccipher_box/bin_struct.rb', line 9

def struct(key, ver = "1.0")
  st = structure(ver)[key] 
  st.clone if not st.nil?
end

#struct_fields_from_bin(bin, *args) ⇒ Object 



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# File 'lib/ccipher_box/bin_struct.rb', line 21

def struct_fields_from_bin(bin, *args)
  Binenc::EngineFactory.instance(:bin_struct).value_from_bin_struct(bin, *args)
end

#struct_from_bin(bin) ⇒ Object 



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# File 'lib/ccipher_box/bin_struct.rb', line 14

def struct_from_bin(bin)
  type, ver = struct_fields_from_bin(bin, 0, 1)
  c = CBTag.value_constant(type) 
  st = struct(c, translate_version(ver))
  st.from_bin(bin) if not st.nil?
end