def process_rule_eps(rule_file_name, cps):
key = '0123456789ABCDEF1111111111111111' #默认解密key
rule_handle = RuleXml(rule_file_name)
handle8020_node = rule_handle.get_first_node(rule_handle.root_element,
'Handle8020')
if not handle8020_node:
return cps
key = rule_handle.get_attribute(handle8020_node, 'key')
for dgi_item in cps.dgi_list:
if dgi_item.name == '8020':
tag8020 = ''
tagA001 = ''
value = dgi_item.get_value('8020')
dgi_len = len(value)
for i in range(0, dgi_len, 34):
tagA001 += value[i:i + 2] + '010000FF0000'
data = algorithm.des3_ecb_decrypt(key, value[i + 2:i + 34])
tag8020 += data
dgi_item.modify_value('8020', tag8020)
dgiA001 = Dgi()
dgiA001.name = 'A001'
dgiA001.add_tag_value('A001', tagA001)
cps.add_dgi(dgiA001)
if dgi_item.name == '9020':
tag9020 = ''
value = dgi_item.get_value('9020')
for i in range(0, len(value), 8):
tag9020 += value[i + 2:i + 8]
dgi_item.modify_value('9020', tag9020)
return cps
def process_mag_data(fh,rule_file_name):
rule_file = RuleXml(rule_file_name)
mag_node = rule_file.get_first_node(rule_file.root_element,'Magstrip')
mag_flag = fh.read_str(fh.current_offset,6)
if mag_flag != '000MAG':
return False
mag_data_len = fh.read_int64(fh.current_offset)
track_flag_list = []
track_flag_list.append(fh.read(fh.current_offset,1))
track_flag_list.append(fh.read(fh.current_offset + 1,1))
track_flag_list.append(fh.read(fh.current_offset + 1,1))
mag_data = fh.read_binary(fh.current_offset,mag_data_len - 5)
mag_data_list = [x for x in mag_data.split('7C') if len(x) > 0]
Log.info('decrypt mag data: ',end='')
Log.info(mag_data_list)
dgi = Dgi()
dgi.name = 'Magstrip'
if mag_node is not None:
mag_key = rule_file.get_attribute(mag_node,'key')
decrypt_mag_list = []
for data in mag_data_list:
data = utils.bcd_to_str(data)
data = algorithm.des3_ecb_decrypt(mag_key,data)
data = utils.bcd_to_str(data)
data_len = int(data[0:4])
data = data[4:data_len + 4].rstrip()
decrypt_mag_list.append(data)
pos = 1
for mag in decrypt_mag_list:
for index in range(pos,4):
pos += 1
option = 'mag' + str(pos)
if track_flag_list[index - 1] == '0':
dgi.add_tag_value(option,'')
continue
dgi.add_tag_value(option,mag)
break
Log.info('decrypt mag data: ',end='')
Log.info(decrypt_mag_list)
return dgi