def generate_public_key_pair(self, p1, p2, data):
"""
The GENERATE PUBLIC-KEY PAIR command either initiates the generation
and storing of a key pair, i.e., a public key and a private key, in the
card, or accesses a key pair previously generated in the card.
:param p1: should be 0x00 (generate new key)
:param p2: '00' (no information provided) or reference of the key to be generated
:param data: One or more CRTs associated to the key generation if P1-P2 different from '0000'
"""
from Crypto.PublicKey import RSA, DSA
from Crypto.Util.randpool import RandomPool
rnd = RandomPool()
cipher = self.ct.algorithm
c_class = locals().get(cipher, None)
if c_class is None:
raise SwError(SW["ERR_CONDITIONNOTSATISFIED"])
if p1 & 0x01 == 0x00: #Generate key
PublicKey = c_class.generate(self.dst.keylength, rnd.get_bytes)
self.dst.key = PublicKey
else:
pass #Read key
#Encode keys
if cipher == "RSA":
#Public key
n = str(PublicKey.__getstate__()['n'])
e = str(PublicKey.__getstate__()['e'])
pk = ((0x81, len(n), n), (0x82, len(e), e))
result = bertlv_pack(pk)
#Private key
d = PublicKey.__getstate__()['d']
elif cipher == "DSA":
#DSAParams
p = str(PublicKey.__getstate__()['p'])
q = str(PublicKey.__getstate__()['q'])
g = str(PublicKey.__getstate__()['g'])
#Public key
y = str(PublicKey.__getstate__()['y'])
pk = ((0x81, len(p), p), (0x82, len(q), q), (0x83, len(g), g),
(0x84, len(y), y))
#Private key
x = str(PublicKey.__getstate__()['x'])
#Add more algorithms here
#elif cipher = "ECDSA":
else:
raise SwError(SW["ERR_CONDITIONNOTSATISFIED"])
result = bertlv_pack([[0x7F49, len(pk), pk]])
#TODO: Internally store key pair
if p1 & 0x02 == 0x02:
#We do not support extended header lists yet
raise SwError["ERR_NOTSUPPORTED"]
else:
return SW["NORMAL"], result
def parse_SE_config(self, config):
r = 0x9000
try:
ControlReferenceTemplate.parse_SE_config(self, config)
except SwError as e:
structure = unpack(config)
for tlv in structure:
tag, length, value = tlv
if tag == 0x7f4c:
self.chat = CHAT(bertlv_pack([[tag, length, value]]))
print(self.chat)
elif tag == 0x67:
self.auxiliary_data = bertlv_pack([[tag, length, value]])
elif tag == 0x80 or tag == 0x84 or tag == 0x83 or tag == 0x91:
# handled by ControlReferenceTemplate.parse_SE_config
pass
else:
raise SwError(SW["ERR_REFNOTUSABLE"])
structure = unpack(config)
pin_ref_str = '%c'% self.PACE_PIN
for tlv in structure:
if [0x83, len(pin_ref_str), pin_ref_str] == tlv:
if self.sam.counter <= 0:
r = 0x63c0
elif self.sam.counter == 1:
r = 0x63c1
elif self.sam.counter == 2:
r = 0x63c2
return r, ""
def generate_public_key_pair(self, p1, p2, data):
"""
The GENERATE PUBLIC-KEY PAIR command either initiates the generation
and storing of a key pair, i.e., a public key and a private key, in the
card, or accesses a key pair previously generated in the card.
:param p1: should be 0x00 (generate new key)
:param p2: '00' (no information provided) or reference of the key to be generated
:param data: One or more CRTs associated to the key generation if P1-P2 different from '0000'
"""
from Crypto.PublicKey import RSA, DSA
from Crypto.Util.randpool import RandomPool
rnd = RandomPool()
cipher = self.ct.algorithm
c_class = locals().get(cipher, None)
if c_class is None:
raise SwError(SW["ERR_CONDITIONNOTSATISFIED"])
if p1 & 0x01 == 0x00: #Generate key
PublicKey = c_class.generate(self.dst.keylength, rnd.get_bytes)
self.dst.key = PublicKey
else:
pass #Read key
#Encode keys
if cipher == "RSA":
#Public key
n = str(PublicKey.__getstate__()['n'])
e = str(PublicKey.__getstate__()['e'])
pk = ((0x81, len(n), n), (0x82, len(e), e))
result = bertlv_pack(pk)
#Private key
d = PublicKey.__getstate__()['d']
elif cipher == "DSA":
#DSAParams
p = str(PublicKey.__getstate__()['p'])
q = str(PublicKey.__getstate__()['q'])
g = str(PublicKey.__getstate__()['g'])
#Public key
y = str(PublicKey.__getstate__()['y'])
pk = ((0x81, len(p), p), (0x82, len(q), q), (0x83, len(g), g),
(0x84, len(y), y))
#Private key
x = str(PublicKey.__getstate__()['x'])
#Add more algorithms here
#elif cipher = "ECDSA":
else:
raise SwError(SW["ERR_CONDITIONNOTSATISFIED"])
result = bertlv_pack([[0x7F49, len(pk), pk]])
#TODO: Internally store key pair
if p1 & 0x02 == 0x02:
#We do not support extended header lists yet
raise SwError["ERR_NOTSUPPORTED"]
else:
return SW["NORMAL"], result
def parse_SE_config(self, config):
r = 0x9000
try:
ControlReferenceTemplate.parse_SE_config(self, config)
except SwError as e:
structure = unpack(config)
for tlv in structure:
tag, length, value = tlv
if tag == 0x7f4c:
self.chat = CHAT(bertlv_pack([[tag, length, value]]))
print(self.chat)
elif tag == 0x67:
self.auxiliary_data = bertlv_pack([[tag, length, value]])
elif tag == 0x80 or tag == 0x84 or tag == 0x83 or tag == 0x91:
# handled by ControlReferenceTemplate.parse_SE_config
pass
else:
raise SwError(SW["ERR_REFNOTUSABLE"])
return r, ""
def parse_SE_config(self, config):
r = 0x9000
try:
ControlReferenceTemplate.parse_SE_config(self, config)
except SwError as e:
structure = unpack(config)
for tlv in structure:
tag, length, value = tlv
if tag == 0x7f4c:
self.chat = CHAT(bertlv_pack([[tag, length, value]]))
print(self.chat)
elif tag == 0x67:
self.auxiliary_data = bertlv_pack([[tag, length, value]])
elif tag == 0x80 or tag == 0x84 or tag == 0x83 or tag == 0x91:
# handled by ControlReferenceTemplate.parse_SE_config
pass
else:
raise SwError(SW["ERR_REFNOTUSABLE"])
return r, ""
def protect_response(self, sw, result):
"""
This method protects a response APDU using secure messaging mechanisms
:returns: the protected data and the SW bytes
"""
return_data = ""
if result != "":
# Encrypt the data included in the RAPDU
encrypted = self.encipher(0x82, 0x80, result)
encrypted = "\x01" + encrypted
encrypted_tlv = bertlv_pack([(
SM_Class["CRYPTOGRAM_PADDING_INDICATOR_ODD"],
len(encrypted),
encrypted)])
return_data += encrypted_tlv
sw_str = inttostring(sw)
length = len(sw_str)
tag = SM_Class["PLAIN_PROCESSING_STATUS"]
tlv_sw = bertlv_pack([(tag, length, sw_str)])
return_data += tlv_sw
if self.cct.algorithm == None:
raise SwError(SW["CONDITIONSNOTSATISFIED"])
elif self.cct.algorithm == "CC":
tag = SM_Class["CHECKSUM"]
padded = vsCrypto.append_padding(self.cct.blocklength, return_data)
auth = self.compute_cryptographic_checksum(0x8E, 0x80, padded)
length = len(auth)
return_data += bertlv_pack([(tag, length, auth)])
elif self.cct.algorithm == "SIGNATURE":
tag = SM_Class["DIGITAL_SIGNATURE"]
hash = self.hash(0x90, 0x80, return_data)
auth = self.compute_digital_signature(0x9E, 0x9A, hash)
length = len(auth)
return_data += bertlv_pack([(tag, length, auth)])
return sw, return_data
def protect_response(self, sw, result):
"""
This method protects a response APDU using secure messaging mechanisms
:returns: the protected data and the SW bytes
"""
return_data = b""
if result:
# Encrypt the data included in the RAPDU
encrypted = self.encipher(0x82, 0x80, result)
encrypted = b"\x01" + encrypted
encrypted_tlv = bertlv_pack([
(SM_Class["CRYPTOGRAM_PADDING_INDICATOR_ODD"], len(encrypted),
encrypted)
])
return_data += encrypted_tlv
sw_str = inttostring(sw)
length = len(sw_str)
tag = SM_Class["PLAIN_PROCESSING_STATUS"]
tlv_sw = bertlv_pack([(tag, length, sw_str)])
return_data += tlv_sw
if self.cct.algorithm is None:
raise SwError(SW["CONDITIONSNOTSATISFIED"])
elif self.cct.algorithm == "CC":
tag = SM_Class["CHECKSUM"]
padded = vsCrypto.append_padding(self.cct.blocklength, return_data)
auth = self.compute_cryptographic_checksum(0x8E, 0x80, padded)
length = len(auth)
return_data += bertlv_pack([(tag, length, auth)])
elif self.cct.algorithm == "SIGNATURE":
tag = SM_Class["DIGITAL_SIGNATURE"]
hash = self.hash(0x90, 0x80, return_data)
auth = self.compute_digital_signature(0x9E, 0x9A, hash)
length = len(auth)
return_data += bertlv_pack([(tag, length, auth)])
return sw, return_data
def verify_certificate(self, p1, p2, data):
if (p1, p2) != (0x00, 0xbe):
raise SwError(SW["ERR_INCORRECTPARAMETERS"])
cert = bertlv_pack([[0x7f21, len(data), data]])
if 1 != eac.TA_STEP2_import_certificate(self.eac_ctx, cert):
eac.print_ossl_err()
raise SwError(SW["ERR_NOINFO69"])
print "Imported Certificate"
return ""
def verify_certificate(self, p1, p2, data):
if (p1, p2) != (0x00, 0xbe):
raise SwError(SW["ERR_INCORRECTPARAMETERS"])
cert = bertlv_pack([[0x7f21, len(data), data]])
if 1 != eac.TA_STEP2_import_certificate(self.eac_ctx, cert):
eac.print_ossl_err()
raise SwError(SW["ERR_NOINFO69"])
print("Imported Certificate")
return b""
def parse_SE_config(self, config):
r = 0x9000
try:
ControlReferenceTemplate.parse_SE_config(self, config)
except SwError as e:
structure = unpack(config)
for tlv in structure:
tag, length, value = tlv
if tag == 0x7f4c:
self.chat = CHAT(bertlv_pack([[tag, length, value]]))
elif tag == 0x67:
self.auxiliary_data = bertlv_pack([[tag, length, value]])
# extract reference values for verifying
# DateOfBirth, DateOfExpiry and CommunityID
for ddo in decodeDiscretionaryDataObjects(value):
try:
oidvalue = ddo[0][2]
reference = ddo[1][2]
mapped_algo = ALGO_MAPPING[oidvalue]
if mapped_algo == "DateOfBirth":
self.DateOfBirth = int(reference)
logging.info("Found reference DateOfBirth: " +
str(self.DateOfBirth))
elif mapped_algo == "DateOfExpiry":
self.DateOfExpiry = int(reference)
logging.info("Found reference DateOfExpiry: " +
str(self.DateOfExpiry))
elif mapped_algo == "CommunityID":
self.CommunityID = binascii.hexlify(reference)
logging.info("Found reference CommunityID: " +
str(self.CommunityID))
except:
pass
elif tag == 0x80 or tag == 0x84 or tag == 0x83 or tag == 0x91:
# handled by ControlReferenceTemplate.parse_SE_config
pass
else:
raise SwError(SW["ERR_REFNOTUSABLE"])
return r, b""
def parse_SE_config(self, config):
r = 0x9000
try:
ControlReferenceTemplate.parse_SE_config(self, config)
except SwError as e:
structure = unpack(config)
for tlv in structure:
tag, length, value = tlv
if tag == 0x7f4c:
self.chat = CHAT(bertlv_pack([[tag, length, value]]))
elif tag == 0x67:
self.auxiliary_data = bertlv_pack([[tag, length, value]])
# extract reference values for verifying
# DateOfBirth, DateOfExpiry and CommunityID
for ddo in decodeDiscretionaryDataObjects(value):
try:
oidvalue = ddo[0][2]
reference = ddo[1][2]
mapped_algo = ALGO_MAPPING[oidvalue]
if mapped_algo == "DateOfBirth":
self.DateOfBirth = int(reference)
logging.info("Found reference DateOfBirth: " +
str(self.DateOfBirth))
elif mapped_algo == "DateOfExpiry":
self.DateOfExpiry = int(reference)
logging.info("Found reference DateOfExpiry: " +
str(self.DateOfExpiry))
elif mapped_algo == "CommunityID":
self.CommunityID = binascii.hexlify(reference)
logging.info("Found reference CommunityID: " +
str(self.CommunityID))
except:
pass
elif tag == 0x80 or tag == 0x84 or tag == 0x83 or tag == 0x91:
# handled by ControlReferenceTemplate.parse_SE_config
pass
else:
raise SwError(SW["ERR_REFNOTUSABLE"])
return r, ""
def __pack_general_authenticate(data):
tlv_data = bertlv_pack(data)
return bertlv_pack([[0x7c, len(tlv_data), tlv_data]])
def parse_SM_CAPDU(self, CAPDU, authenticate_header):
"""
This methods parses a data field including Secure Messaging objects.
SM_header indicates whether or not the header of the message shall be
authenticated. It returns an unprotected command APDU
:param CAPDU: The protected CAPDU to be parsed
:param authenticate_header: Whether or not the header should be
included in authentication mechanisms
:returns: Unprotected command APDU
"""
structure = unpack(CAPDU.data)
return_data = [
"",
]
cla = None
ins = None
p1 = None
p2 = None
le = None
if authenticate_header:
to_authenticate = inttostring(CAPDU.cla) + inttostring(CAPDU.ins)+\
inttostring(CAPDU.p1) + inttostring(CAPDU.p2)
to_authenticate = vsCrypto.append_padding(self.cct.blocklength,
to_authenticate)
else:
to_authenticate = ""
for tlv in structure:
tag, length, value = tlv
if tag % 2 == 1: #Include object in checksum calculation
to_authenticate += bertlv_pack([[tag, length, value]])
#SM data objects for encapsulating plain values
if tag in (SM_Class["PLAIN_VALUE_NO_TLV"],
SM_Class["PLAIN_VALUE_NO_TLV_ODD"]):
return_data.append(value) #FIXME: Need TLV coding?
#Encapsulated SM objects. Parse them
#FIXME: Need to pack value into a dummy CAPDU
elif tag in (SM_Class["PLAIN_VALUE_TLV_INCULDING_SM"],
SM_Class["PLAIN_VALUE_TLV_INCULDING_SM_ODD"]):
return_data.append(
self.parse_SM_CAPDU(value, authenticate_header))
#Encapsulated plaintext BER-TLV objects
elif tag in (SM_Class["PLAIN_VALUE_TLV_NO_SM"],
SM_Class["PLAIN_VALUE_TLV_NO_SM_ODD"]):
return_data.append(value)
elif tag in (SM_Class["Ne"], SM_Class["Ne_ODD"]):
le = value
elif tag == SM_Class["PLAIN_COMMAND_HEADER"]:
if len(value) != 8:
raise SwError(SW["ERR_SECMESSOBJECTSINCORRECT"])
else:
cla = value[:2]
ins = value[2:4]
p1 = value[4:6]
p2 = value[6:8]
#SM data objects for confidentiality
if tag in (SM_Class["CRYPTOGRAM_PLAIN_TLV_INCLUDING_SM"],
SM_Class["CRYPTOGRAM_PLAIN_TLV_INCLUDING_SM_ODD"]):
#The cryptogram includes SM objects.
#We decrypt them and parse the objects.
plain = self.decipher(tag, 0x80, value)
#TODO: Need Le = length
return_data.append(
self.parse_SM_CAPDU(plain, authenticate_header))
elif tag in (SM_Class["CRYPTOGRAM_PLAIN_TLV_NO_SM"],
SM_Class["CRYPTOGRAM_PLAIN_TLV_NO_SM_ODD"]):
#The cryptogram includes BER-TLV encoded plaintext.
#We decrypt them and return the objects.
plain = self.decipher(tag, 0x80, value)
return_data.append(plain)
elif tag in (SM_Class["CRYPTOGRAM_PADDING_INDICATOR"],
SM_Class["CRYPTOGRAM_PADDING_INDICATOR_ODD"]):
#The first byte of the data field indicates the padding to use:
"""
Value Meaning
'00' No further indication
'01' Padding as specified in 6.2.3.1
'02' No padding
'1X' One to four secret keys for enciphering information,
not keys ('X' is a bitmap with any value from '0' to 'F')
'11' indicates the first key (e.g., an "even" control word
in a pay TV system)
'12' indicates the second key (e.g., an "odd" control word
in a pay TV system)
'13' indicates the first key followed by the second key
(e.g., a pair of control words in a pay TV system)
'2X' Secret key for enciphering keys, not information
('X' is a reference with any value from '0' to 'F')
(e.g., in a pay TV system, either an operational key
for enciphering control words, or a management key for
enciphering operational keys)
'3X' Private key of an asymmetric key pair ('X' is a
reference with any value from '0' to 'F')
'4X' Password ('X' is a reference with any value from '0' to
'F')
'80' to '8E' Proprietary
"""
padding_indicator = stringtoint(value[0])
plain = self.decipher(tag, 0x80, value[1:])
plain = vsCrypto.strip_padding(self.ct.blocklength, plain,
padding_indicator)
return_data.append(plain)
#SM data objects for authentication
if tag == SM_Class["CHECKSUM"]:
auth = vsCrypto.append_padding(self.cct.blocklength,
to_authenticate)
checksum = self.compute_cryptographic_checksum(
0x8E, 0x80, auth)
if checksum != value:
raise SwError(SW["ERR_SECMESSOBJECTSINCORRECT"])
elif tag == SM_Class["DIGITAL_SIGNATURE"]:
auth = to_authenticate #FIXME: Need padding?
signature = self.compute_digital_signature(0x9E, 0x9A, auth)
if signature != value:
raise SwError(SW["ERR_SECMESSOBJECTSINCORRECT"])
elif tag in (SM_Class["HASH_CODE"], SM_Class["HASH_CODE_ODD"]):
hash = self.hash(p1, p2, to_authenticate)
if hash != value:
raise SwError(SW["ERR_SECMESSOBJECTSINCORRECT"])
#Form unprotected CAPDU
if cla == None:
cla = CAPDU.cla
if ins == None:
ins = CAPDU.ins
if p1 == None:
p1 = CAPDU.p1
if p2 == None:
p2 = CAPDU.p2
# FIXME
#if expected != "":
#raise SwError(SW["ERR_SECMESSOBJECTSMISSING"])
if isinstance(le, str):
# FIXME C_APDU only handles le with strings of length 1. Better patch utils.py to support extended length apdus
le_int = stringtoint(le)
if le_int == 0 and len(le) > 1:
le_int = MAX_EXTENDED_LE
le = le_int
c = C_APDU(cla=cla,
ins=ins,
p1=p1,
p2=p2,
le=le,
data="".join(return_data))
return c
def __pack_general_authenticate(data):
tlv_data = bertlv_pack(data)
return bertlv_pack([[0x7c, len(tlv_data), tlv_data]])
def parse_SM_CAPDU(self, CAPDU, authenticate_header):
"""
This methods parses a data field including Secure Messaging objects.
SM_header indicates whether or not the header of the message shall be
authenticated. It returns an unprotected command APDU
:param CAPDU: The protected CAPDU to be parsed
:param authenticate_header: Whether or not the header should be
included in authentication mechanisms
:returns: Unprotected command APDU
"""
structure = unpack(CAPDU.data)
return_data = ["",]
cla = None
ins = None
p1 = None
p2 = None
le = None
if authenticate_header:
to_authenticate = inttostring(CAPDU.cla) + inttostring(CAPDU.ins)+\
inttostring(CAPDU.p1) + inttostring(CAPDU.p2)
to_authenticate = vsCrypto.append_padding(self.cct.blocklength, to_authenticate)
else:
to_authenticate = ""
for tlv in structure:
tag, length, value = tlv
if tag % 2 == 1: #Include object in checksum calculation
to_authenticate += bertlv_pack([[tag, length, value]])
#SM data objects for encapsulating plain values
if tag in (SM_Class["PLAIN_VALUE_NO_TLV"],
SM_Class["PLAIN_VALUE_NO_TLV_ODD"]):
return_data.append(value) #FIXME: Need TLV coding?
#Encapsulated SM objects. Parse them
#FIXME: Need to pack value into a dummy CAPDU
elif tag in (SM_Class["PLAIN_VALUE_TLV_INCULDING_SM"],
SM_Class["PLAIN_VALUE_TLV_INCULDING_SM_ODD"]):
return_data.append(self.parse_SM_CAPDU(value, authenticate_header))
#Encapsulated plaintext BER-TLV objects
elif tag in (SM_Class["PLAIN_VALUE_TLV_NO_SM"],
SM_Class["PLAIN_VALUE_TLV_NO_SM_ODD"]):
return_data.append(value)
elif tag in (SM_Class["Ne"], SM_Class["Ne_ODD"]):
le = value
elif tag == SM_Class["PLAIN_COMMAND_HEADER"]:
if len(value) != 8:
raise SwError(SW["ERR_SECMESSOBJECTSINCORRECT"])
else:
cla = value[:2]
ins = value[2:4]
p1 = value[4:6]
p2 = value[6:8]
#SM data objects for confidentiality
if tag in (SM_Class["CRYPTOGRAM_PLAIN_TLV_INCLUDING_SM"],
SM_Class["CRYPTOGRAM_PLAIN_TLV_INCLUDING_SM_ODD"]):
#The cryptogram includes SM objects.
#We decrypt them and parse the objects.
plain = self.decipher(tag, 0x80, value)
#TODO: Need Le = length
return_data.append(self.parse_SM_CAPDU(plain, authenticate_header))
elif tag in (SM_Class["CRYPTOGRAM_PLAIN_TLV_NO_SM"],
SM_Class["CRYPTOGRAM_PLAIN_TLV_NO_SM_ODD"]):
#The cryptogram includes BER-TLV encoded plaintext.
#We decrypt them and return the objects.
plain = self.decipher(tag, 0x80, value)
return_data.append(plain)
elif tag in (SM_Class["CRYPTOGRAM_PADDING_INDICATOR"],
SM_Class["CRYPTOGRAM_PADDING_INDICATOR_ODD"]):
#The first byte of the data field indicates the padding to use:
"""
Value Meaning
'00' No further indication
'01' Padding as specified in 6.2.3.1
'02' No padding
'1X' One to four secret keys for enciphering information,
not keys ('X' is a bitmap with any value from '0' to 'F')
'11' indicates the first key (e.g., an "even" control word
in a pay TV system)
'12' indicates the second key (e.g., an "odd" control word
in a pay TV system)
'13' indicates the first key followed by the second key
(e.g., a pair of control words in a pay TV system)
'2X' Secret key for enciphering keys, not information
('X' is a reference with any value from '0' to 'F')
(e.g., in a pay TV system, either an operational key
for enciphering control words, or a management key for
enciphering operational keys)
'3X' Private key of an asymmetric key pair ('X' is a
reference with any value from '0' to 'F')
'4X' Password ('X' is a reference with any value from '0' to
'F')
'80' to '8E' Proprietary
"""
padding_indicator = stringtoint(value[0])
plain = self.decipher(tag, 0x80, value[1:])
plain = vsCrypto.strip_padding(self.ct.blocklength, plain,
padding_indicator)
return_data.append(plain)
#SM data objects for authentication
if tag == SM_Class["CHECKSUM"]:
auth = vsCrypto.append_padding(self.cct.blocklength, to_authenticate)
checksum = self.compute_cryptographic_checksum(0x8E,
0x80,
auth)
if checksum != value:
raise SwError(SW["ERR_SECMESSOBJECTSINCORRECT"])
elif tag == SM_Class["DIGITAL_SIGNATURE"]:
auth = to_authenticate #FIXME: Need padding?
signature = self.compute_digital_signature(0x9E, 0x9A, auth)
if signature != value:
raise SwError(SW["ERR_SECMESSOBJECTSINCORRECT"])
elif tag in (SM_Class["HASH_CODE"], SM_Class["HASH_CODE_ODD"]):
hash = self.hash(p1, p2, to_authenticate)
if hash != value:
raise SwError(SW["ERR_SECMESSOBJECTSINCORRECT"])
#Form unprotected CAPDU
if cla == None:
cla = CAPDU.cla
if ins == None:
ins = CAPDU.ins
if p1 == None:
p1 = CAPDU.p1
if p2 == None:
p2 = CAPDU.p2
if le == None:
le = CAPDU.le
# FIXME
#if expected != "":
#raise SwError(SW["ERR_SECMESSOBJECTSMISSING"])
if isinstance(le, str):
# FIXME C_APDU only handles le with strings of length 1. Better patch utils.py to support extended length apdus
le_int = stringtoint(le)
if le_int == 0 and len(le) > 1:
le_int = MAX_EXTENDED_LE
le = le_int
c = C_APDU(cla=cla, ins=ins, p1=p1, p2=p2, le=le, data="".join(return_data))
return c