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ehealth-card.py
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ehealth-card.py
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#!/usr/bin/env python3
# coding: utf-8
#
# Andreas Müller, 2012
# am@0x7.ch
#
# This code may be freely used and distributed under GNU GPL conditions.
"""
Communicate with Swiss eHealth cards as specified by eCH-0064.
"""
import sys
from optparse import OptionParser
import smartcard
from smartcard.System import readers
from smartcard.ATR import ATR
def l2s(l):
return bytes(l).decode("utf-8")
class SmartCardCommunication:
"""
Handles smard card communication with ISO 7816-4.
"""
def __init__(self, reader, verbosity):
self.reader = reader
self.connection = reader.createConnection()
self.verbosity = verbosity
try:
self.connection.connect()
except smartcard.Exceptions.CardConnectionException as e:
print(e.message)
sys.exit(1)
def get_atr(self):
return self.connection.getATR()
def select_file(self, file_id):
SELECT = [0x00, 0xa4, 0x00, 0x00, len(file_id)]
data, sw1, sw2 = self.connection.transmit(SELECT + file_id)
if self.verbosity > 0:
print("SELECT returned sw1 = %x, sw2 = %x" % (sw1, sw2))
if sw1 != 0x90:
sys.stderr.write("SELECT failed - exiting\n")
sys.exit(1)
def read_binary(self, length):
READ_BINARY = [0x00, 0xb0, 0x00, 0x00, 0x00, 0x00, length]
data, sw1, sw2 = self.connection.transmit(READ_BINARY)
if self.verbosity > 0:
print("READ BINARY returned sw1 = %x, sw2 = %x" % (sw1, sw2))
if sw1 != 0x90:
sys.stderr.write("READ BINARY failed - exiting\n")
sys.exit(1)
return data
class HealthCard:
"""
Communicate with Swiss health insurance card (eCH-0064).
"""
# expected answer to reset
ATR = [0x3B, 0x9F, 0x13, 0x81, 0xB1, 0x80, 0x37, 0x1F, 0x03, 0x80, 0x31, 0xF8, 0x69, 0x4D, 0x54, 0x43, 0x4F, 0x53, 0x70, 0x02, 0x01, 0x02, 0x81, 0x07, 0x86]
# master file
MF = [0x3f, 0x00]
# dedicated files
DF = {
'NOT': [0xDF, 0x01], # emergency data
'PKCS15': [0xDF, 0x02] # PKCS#15 data
}
# elementary files
EF = {
# main directory
'DIR': [ 0x2F, 0x00],
'ATR': [ 0x2F, 0x01],
'ICCSN': [ 0x2F, 0x05],
'PIN1': [ 0x00, 0x11],
'PIN2 ': [ 0x00, 0x12],
'PUK': [ 0x00, 0x14],
'ID': [ 0x2F, 0x06],
'AD': [ 0x2F, 0x07],
'VERSION': [ 0x56, 0x00],
'CVC.PDC': [ 0x2F, 0x03],
'CVC.CA_ORG_PDC': [ 0x2F, 0x08],
'PrK.SB ': [ 0x00, 0x15],
'CVC.CA_ROOT_VK': [ 0x2F, 0x04],
'PuK.CA_ROOT_VK': [ 0x00, 0x1C],
'C2CSTATE': [ 0x00, 0x1D],
'GPKeys': [ 0x00, 0x01],
# emergency data directory
'BGTD': [ 0xDF, 0x01, 0x1F, 0x01],
'IMMD': [ 0xDF, 0x01, 0x1F, 0x02],
'TPLD': [ 0xDF, 0x01, 0x1F, 0x03],
'KHUF': [ 0xDF, 0x01, 0x1F, 0x04],
'ZUSE': [ 0xDF, 0x01, 0x1F, 0x05],
'MEDI': [ 0xDF, 0x01, 0x1F, 0x06],
'ALLG': [ 0xDF, 0x01, 0x1F, 0x07],
'ADDR': [ 0xDF, 0x01, 0x1F, 0x08],
'VERF': [ 0xDF, 0x01, 0x1F, 0x09],
'CIAInfo': [ 0xDF, 0x02, 0x50, 0x32],
'OD': [ 0xDF, 0x02, 0x50, 0x31],
'PrKD': [ 0xDF, 0x02, 0x1F, 0x01],
'PuKD': [ 0xDF, 0x02, 0x1F, 0x02],
'CD': [ 0xDF, 0x02, 0x1F, 0x03],
'DCOD': [ 0xDF, 0x02, 0x1F, 0x04],
'AOD': [ 0xDF, 0x02, 0x1F, 0x05],
'CERT': [ 0xDF, 0x02, 0x1F, 0x06],
'PuK.DEC': [ 0xDF, 0x02, 0x1F, 0x07],
'PuK.X509': [ 0xDF, 0x02, 0x1F, 0x08],
'PrK.DEC': [ 0xDF, 0x02, 0x00, 0x16],
'PrK.X509': [ 0xDF, 0x02, 0x00, 0x17]
}
TLV_FORMATS = {
'ID': [
(0x80, 50, 's', "name"),
(0x82, 8, 'd', "date_of_birth"),
(0x83, 13, 's', "insurance_number"),
(0x84, 1, 'b', "sex"),
],
'AD': [
(0x90, 2, 's', "issuing_state_id"),
(0x91, 50, 's', "insurance_name"),
(0x92, 5, 's', "insurance_BAG_number"),
(0x93, 20, 's', "card_number"),
(0x94, 8, 'd', "expiry_date"),
]
}
def __init__(self, reader, verbosity):
self.scc = SmartCardCommunication(reader, verbosity)
self.verbosity = verbosity
atr = self.scc.get_atr()
if not atr == self.ATR:
sys.stderr.write("Unexpected ATR - not a Swiss health insurance card? Exiting.\n")
sys.exit(1)
if self.verbosity > 0:
print("ATR: " + " ".join([hex(x) for x in atr]))
if self.verbosity > 1:
ATR(atr).dump()
def decode_tlv(self, tlv_format, data):
output = {}
offset = 0
if options.verbosity > 1:
print("decoding data:")
print([hex(x) for x in data])
if data[0] != 0x65:
sys.stderr.write("Error: expected 0x65 as first byte of TLV data, but got %x\n" % data[0])
return output
offset += 2
for entry in tlv_format:
if data[offset] != entry[0]:
sys.stderr.write("Error: expected %x as TLV tag for '%s', but got %x\n" % (entry[0], entry[3], data[offset]))
return output
offset += 1
length = data[offset]
if length > entry[1]:
sys.stderr.write("Error: TLV length %d too large (max %d) for '%s'\n" % (length, entry[1], entry[3]))
return output
offset += 1
if entry[2] == 's':
output[entry[3]] = l2s(data[offset:offset+length])
elif entry[2] == 'd':
date = l2s(data[offset:offset+length])
output[entry[3]] = (int(date[0:4]), int(date[4:6]), int(date[6:8]))
else:
output[entry[3]] = data[offset:offset+length]
offset += length
return output
def decode_id(self, data):
"""
Decode ID (identification data) TLV.
@param data: binary data
"""
output = self.decode_tlv(self.TLV_FORMATS['ID'], data)
output['family_name'] = output['name'].split(',')[0].strip()
output['given_name'] = output['name'].split(',')[1].strip()
SEX = {0: 'unknown', 1: 'male', 2: 'female', 9: 'not applicable'}
output['sex'] = SEX[output['sex'][0]]
return output
def decode_ad(self, data):
"""
Decode AD (administrative data) TLV.
@param data: binary data
"""
return self.decode_tlv(self.TLV_FORMATS['AD'], data)
def decode_version(self, data):
"""
Decode VERSION EF.
@param data: binary data
"""
output = {}
output['acronym'] = l2s(data[0:3])
output['version'] = data[3] & ~0x80
output['PDC'] = (data[3] & 0x80) == 0x80
return output
def print_id(self):
self.scc.select_file(self.EF['ID'])
data = self.decode_id(self.scc.read_binary(84))
print("Name: " + data['given_name'] + " " + data['family_name'])
print("Date of birth (y-m-d): %d-%d-%d" % data['date_of_birth'])
print("Insurance number: " + data['insurance_number'])
print("Sex: " + data['sex'])
def print_ad(self):
self.scc.select_file(self.EF['AD'])
data = self.decode_ad(self.scc.read_binary(95))
print("Issuing state ID: " + data['issuing_state_id'])
print("Insurance name: " + data['insurance_name'])
print("Insurance BAG number: " + data['insurance_BAG_number'])
print("Card number: " + data['card_number'])
print("Expiry data (y-m-d): %d-%d-%d" % data['expiry_date'])
def print_version(self):
self.scc.select_file(self.EF['VERSION'])
data = self.decode_version(self.scc.read_binary(4))
print("%s Version %d (PDC: %s)" % (data['acronym'], data['version'], data['PDC']))
def get_cvc_pdc(self, output):
# TODO make get file command generic .. (-> save lengths in EF dict)
self.scc.select_file(self.EF['CVC.PDC'])
data = self.scc.read_binary(217)
with open(output, 'wb') as f:
f.write(bytes(data))
if __name__ == "__main__":
parser = OptionParser(usage="%prog <cmd>", version="%prog 0.1")
parser.add_option("-r", "--reader", type="int", dest="reader", help="use reader number N", metavar="N")
parser.add_option("-l", "--list-readers", dest="list_readers", action="store_true", help="list available readers")
parser.add_option("-i", "--print-id", dest="print_id", action="store_true", help="read, decode and print EF.ID")
parser.add_option("-a", "--print-ad", dest="print_ad", action="store_true", help="read, decode and print EF.AD")
parser.add_option("-V", "--print-version", dest="print_version", action="store_true", help="read, decode and print EF.VERSION")
parser.add_option("", "--get-cvc-pdc", dest="get_cvc_pdc", help="read and store EF.CVC.PDC", metavar="FILE")
parser.add_option("-v", "--verbose", action="count", dest="verbosity", default=0, help="verbose output [default: %default]")
(options, args) = parser.parse_args()
smartcard_readers = readers()
if options.list_readers:
for i, reader in enumerate(smartcard_readers):
print("%d: %s" % (i, reader))
sys.exit(0)
if options.reader:
if options.reader >= len(smartcard_readers):
sys.stderr.write("reader not available: %s\n" % options.reader)
sys.exit(1)
reader = smartcard_readers[options.reader]
else:
reader = smartcard_readers[0]
hc = HealthCard(reader, options.verbosity)
if options.print_id:
hc.print_id()
if options.print_ad:
hc.print_ad()
if options.print_version:
hc.print_version()
if options.get_cvc_pdc:
hc.get_cvc_pdc(options.get_cvc_pdc)