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gsm_utils.py
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gsm_utils.py
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# ------------------------------------------------------------------------------------------
# DIFFERENCES BETWEEN GSM AND EMV
# Class Byte = A0 for GSM
# ------------------------------------------------------------------------------------------
# logging
import logging
import log_util
# pyscard
from smartcard.System import readers
from smartcard.util import toHexString
from smartcard.ATR import ATR
from smartcard.Exceptions import NoCardException
from smartcard.Exceptions import CardConnectionException
import apdu
import chip_interrogator as chip
def select_and_requery(connection=None, cla=None, ins=None, p1=None, p2=None, lc=None, data=None, le=None):
initial_reply_data, initial_sw1, initial_sw2 = chip.select(connection=connection, cla=cla, ins=ins, p1=p1, p2=p2, lc=lc, data=data, le=le)
# SW1 = 0x61 => retrieve data using GET RESPONSE command
if (initial_sw1 == 0x9F):
return chip.select(connection=connection, cla=0xA0, ins=0xC0, p1=0x00, p2=0x00, le=initial_sw2)
# SW1 = 0x6c => retrieve data by repeating initial command
elif (initial_sw1 == 0x6C):
return chip.select(connection=connection, cla=cla, ins=ins, p1=p1, p2=p2, lc=lc, data=data, le=initial_sw2)
# initial response indicates other error
else:
return (initial_reply_data, initial_sw1, initial_sw2)
def report_on_chv_status(chv):
if isinstance(chv, list):
chv = chv[0]
report = []
num_false_presentations_remaining = (chv & 15)
report.append('num_false_presentations_remaining = %i' % num_false_presentations_remaining)
secret_code_init_status = 'secret code initialised ' if (chv & 128 == 128) else 'secret code not initialised'
report.append('secret_code_init_status = %s' % secret_code_init_status)
rfu = chv & (16 + 32 + 64)
report.append('rfu %i' % rfu)
return report
def report_on_mf_df_select(ret_data):
report = []
try:
rfu_1 = ret_data[0:2]
report.append('rfu_1 %s' % str(rfu_1))
non_alloc_mem = ret_data[2:4]
report.append('non_alloc_mem %s' % str(non_alloc_mem))
file_id = ret_data[4:6]
report.append('file_id %s' % '.'.join(['%02X' % x for x in file_id]))
type_of_file = ret_data[6:7]
report.append('type_of_file %s' % str(type_of_file))
rfu_2 = ret_data[7:12]
report.append('rfu_2 %s' % str(rfu_2))
data_len = ret_data[12:13]
report.append('data_len %s' % str(data_len))
gsm_specific = ret_data[13:]
report.append('gsm_specific [len = %i] = %s ' % (len(gsm_specific), str(gsm_specific)))
file_characteristics = ret_data[13:14]
report.append('file_characteristics %s' % str(file_characteristics))
chv1_enabled = (file_characteristics[0] & 128) == 128
report.append('- CHV1 Enabled ? %s' % chv1_enabled)
num_child_DFs = ret_data[14:15]
report.append('num_child_DFs %s' % str(num_child_DFs))
num_child_EFs = ret_data[15:16]
report.append('num_child_EFs %s' % str(num_child_EFs))
num_child_CHVs = ret_data[16:17]
report.append('num_child_CHVs %s' % str(num_child_CHVs))
rfu_3 = ret_data[17:18]
report.append('rfu_3 %s' % str(rfu_3))
chv1_status = ret_data[18:19]
report.append('chv1_status %s' % str(chv1_status))
for line in report_on_chv_status(chv1_status): report.append(line)
unblock_chv1_status = ret_data[19:20]
report.append('unblock_chv1_status %s' % str(unblock_chv1_status))
for line in report_on_chv_status(unblock_chv1_status): report.append(line)
chv2_status = ret_data[20:21]
report.append('chv2_status %s' % str(chv2_status))
for line in report_on_chv_status(chv2_status): report.append(line)
unblock_shv2_status = ret_data[21:22]
report.append('unblock_shv2_status %s' % str(unblock_shv2_status))
for line in report_on_chv_status(unblock_shv2_status): report.append(line)
rfu_4 = ret_data[22:23]
report.append('rfu_4 %s' % str(rfu_4))
res_for_admin_manage = ret_data[23:]
report.append('res_for_admin_manage %s' % str(res_for_admin_manage))
return report
except IndexError:
return report
def interrogate(connection):
atr_data = connection.getATR()
atr_str = '.'.join(['%00X' % x for x in atr_data])
logging.info('ATR: %s [%i bytes]' % (atr_str, len(atr_data)))
# MF = 3F00
# DF GSM = 7F20 (7F21)
# DF ICCID = 2FE2
# DF IMSI = 6F07
# DF Telecom = 7F10
# EF Phase = 6FAE
mf_data=[0x3F, 0x00]
df_gsm_data = [0x7F, 0x20]
imsi_data = [0x6F, 0x07]
icc_data=[0x2F, 0xE2]
ret_data, sw1, sw2 = select_and_requery(connection=connection, cla=0xA0, ins=0xA4, p1=0x00, p2=0x00, data=mf_data, le=0x00)
report = apdu.report_on_reply(sw1, sw2, ret_data)
logging.info('----------------------------------------------')
logging.info('MF')
for line in report: print(line)
for line in report_on_mf_df_select(ret_data):
logging.info(line)
ret_data, sw1, sw2 = select_and_requery(connection=connection, cla=0xA0, ins=0xA4, p1=0x00, p2=0x00, data=icc_data, le=0x00)
report = apdu.report_on_reply(sw1, sw2, ret_data)
logging.info('----------------------------------------------')
logging.info('ICC')
for line in report: print(line)
for line in report_on_mf_df_select(ret_data): logging.info(line)
'''
logging.info('')
ret_data, sw1, sw2 = select_and_requery(connection=connection, cla=0xA0, ins=0xA4, p1=0x00, p2=0x00, data=icc_data, le=0x00)
report = chip.report_on_reply(sw1, sw2, ret_data)
for line in report: print(line)
# 10.1 Contents of the EFs at the MF level
logging.info('')
ret_data, sw1, sw2 = select_and_requery(connection=connection, cla=0xA0, ins=0xA4, p1=0x00, p2=0x00, data=df_gsm_data, le=0x00)
report = chip.report_on_reply(sw1, sw2, ret_data)
for line in report: print(line)
logging.info('')
ret_data, sw1, sw2 = select_and_requery(connection=connection, cla=0xA0, ins=0xA4, p1=0x00, p2=0x00, data=imsi_data, le=0x00)
report = chip.report_on_reply(sw1, sw2, ret_data)
for line in report: print(line)
'''
def locate_chips_and_interrogate():
reader_list = chip.get_readers()
if (len(reader_list) == 0):
logging.info('no smart card reader found.')
return
readers_with_cards = []
logging.info('[%i] readers present.' % len(reader_list))
for i in range(len(reader_list)):
reader = reader_list[i]
got_card_str = 'no card'
if chip.card_is_present_in_reader(reader):
got_card_str = 'card is present'
readers_with_cards.append(reader)
logging.info('reader %i - %s : card present%s' % (i + 1, reader.name, got_card_str))
if readers_with_cards:
for reader in readers_with_cards:
logging.info('using card found in %s' % reader.name)
connxn = chip.get_connected_connection_for_reader(reader)
interrogate(connxn)
connxn.disconnect()
else:
logging.info('no card found in any reader')
def main():
log_util.init_logging(file_name='logs/chip')
try:
locate_chips_and_interrogate()
except CardConnectionException:
logging.info('card connection error')
if __name__ == '__main__':
main()