def parse(self, key_package):
"""Read key information from the provided <KeyPackage> tree."""
from pskc.xml import find, findtext, findtime, getint, getbool
if key_package is None:
return
key = find(key_package, "pskc:Key")
if key is not None:
self.id = key.get("Id")
self.algorithm = key.get("Algorithm")
data = find(key_package, "pskc:Key/pskc:Data")
if data is not None:
self._secret.parse(find(data, "pskc:Secret"))
self._counter.parse(find(data, "pskc:Counter"))
self._time_offset.parse(find(data, "pskc:Time"))
self._time_interval.parse(find(data, "pskc:TimeInterval"))
self._time_drift.parse(find(data, "pskc:TimeDrift"))
self.issuer = findtext(key_package, "pskc:Key/pskc:Issuer")
self.key_profile = findtext(key_package, "pskc:Key/pskc:KeyProfileId")
self.key_reference = findtext(key_package, "pskc:Key/pskc:KeyReference")
self.friendly_name = findtext(key_package, "pskc:Key/pskc:FriendlyName")
# TODO: support multi-language values of <FriendlyName>
self.key_userid = findtext(key_package, "pskc:Key/pskc:UserId")
self.manufacturer = findtext(key_package, "pskc:DeviceInfo/pskc:Manufacturer")
self.serial = findtext(key_package, "pskc:DeviceInfo/pskc:SerialNo")
self.model = findtext(key_package, "pskc:DeviceInfo/pskc:Model")
self.issue_no = findtext(key_package, "pskc:DeviceInfo/pskc:IssueNo")
self.device_binding = findtext(key_package, "pskc:DeviceInfo/pskc:DeviceBinding")
self.start_date = findtime(key_package, "pskc:DeviceInfo/pskc:StartDate")
self.expiry_date = findtime(key_package, "pskc:DeviceInfo/pskc:ExpiryDate")
self.device_userid = findtext(key_package, "pskc:DeviceInfo/pskc:UserId")
self.crypto_module = findtext(key_package, "pskc:CryptoModuleInfo/pskc:Id")
self.algorithm_suite = findtext(key_package, "pskc:Key/pskc:AlgorithmParameters/pskc:Suite")
challenge_format = find(key_package, "pskc:Key/pskc:AlgorithmParameters/pskc:ChallengeFormat")
if challenge_format is not None:
self.challenge_encoding = challenge_format.get("Encoding")
self.challenge_min_length = getint(challenge_format, "Min")
self.challenge_max_length = getint(challenge_format, "Max")
self.challenge_check = getbool(challenge_format, "CheckDigits")
response_format = find(key_package, "pskc:Key/pskc:AlgorithmParameters/pskc:ResponseFormat")
if response_format is not None:
self.response_encoding = response_format.get("Encoding")
self.response_length = getint(response_format, "Length")
self.response_check = getbool(response_format, "CheckDigits")
self.policy.parse(find(key_package, "pskc:Key/pskc:Policy"))
def parse(self, policy):
"""Read key policy information from the provided <Policy> tree."""
from pskc.xml import (
find, findall, findtext, findint, findtime, getint)
if policy is None:
return
self.start_date = findtime(policy, 'pskc:StartDate')
self.expiry_date = findtime(policy, 'pskc:ExpiryDate')
self.number_of_transactions = findint(
policy, 'pskc:NumberOfTransactions')
for key_usage in findall(policy, 'pskc:KeyUsage'):
self.key_usage.append(findtext(key_usage, '.'))
pin_policy = find(policy, 'pskc:PINPolicy')
if pin_policy is not None:
self.pin_key_id = pin_policy.get('PINKeyId')
self.pin_usage = pin_policy.get('PINUsageMode')
self.pin_max_failed_attemtps = getint(
pin_policy, 'MaxFailedAttempts')
self.pin_min_length = getint(pin_policy, 'MinLength')
self.pin_max_length = getint(pin_policy, 'MaxLength')
self.pin_encoding = pin_policy.get('PINEncoding')
