本文整理汇总了Python中virtualsmartcard.CryptoUtils.crypto_checksum方法的典型用法代码示例。如果您正苦于以下问题：Python CryptoUtils.crypto_checksum方法的具体用法？Python CryptoUtils.crypto_checksum怎么用？Python CryptoUtils.crypto_checksum使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类virtualsmartcard.CryptoUtils的用法示例。
在下文中一共展示了CryptoUtils.crypto_checksum方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: external_authenticate
# 需要导入模块: from virtualsmartcard import CryptoUtils [as 别名]
# 或者: from virtualsmartcard.CryptoUtils import crypto_checksum [as 别名]
def external_authenticate(self, p1, p2, resp_data):
"""Performs the basic access control protocol as defined in
the ICAO MRTD standard"""
rnd_icc = self.last_challenge
# Receive Mutual Authenticate APDU from terminal
# Decrypt data and check MAC
Eifd = resp_data[:-8]
padded_Eifd = vsCrypto.append_padding(self.current_SE.cct.blocklength,
Eifd)
Mifd = vsCrypto.crypto_checksum("CC", self.KMac, padded_Eifd)
# Check the MAC
if not Mifd == resp_data[-8:]:
raise SwError(SW["ERR_SECMESSOBJECTSINCORRECT"])
# Decrypt the data
plain = vsCrypto.decrypt("DES3-CBC", self.KEnc, resp_data[:-8])
if plain[8:16] != rnd_icc:
raise SwError(SW["WARN_NOINFO63"])
# Extract keying material from IFD, generate ICC keying material
Kifd = plain[16:]
rnd_ifd = plain[:8]
Kicc = urandom(16)
# Generate Answer
data = plain[8:16] + plain[:8] + Kicc
Eicc = vsCrypto.encrypt("DES3-CBC", self.KEnc, data)
padded_Eicc = vsCrypto.append_padding(self.current_SE.cct.blocklength,
Eicc)
Micc = vsCrypto.crypto_checksum("CC", self.KMac, padded_Eicc)
# Derive the final keys and set the current SE
KSseed = vsCrypto.operation_on_string(Kicc, Kifd, lambda a, b: a ^ b)
self.current_SE.ct.key = self.derive_key(KSseed, 1)
self.current_SE.cct.key = self.derive_key(KSseed, 2)
self.current_SE.ssc = stringtoint(rnd_icc[-4:] + rnd_ifd[-4:])
return SW["NORMAL"], Eicc + Micc示例2: verify_cryptographic_checksum
# 需要导入模块: from virtualsmartcard import CryptoUtils [as 别名]
# 或者: from virtualsmartcard.CryptoUtils import crypto_checksum [as 别名]
def verify_cryptographic_checksum(self, p1, p2, data):
"""
Verify the cryptographic checksum contained in the data field.
Data field must contain a cryptographic checksum (tag 0x8E) and a plain
value (tag 0x80)
"""
plain = ""
cct = ""
algo = self.cct.algorithm
key = self.cct.key
iv = self.cct.iv
if algo == None or key == None:
raise SwError(SW["ERR_CONDITIONNOTSATISFIED"])
structure = unpack(data)
for tag, length, value in structure:
if tag == 0x80:
plain = value
elif tag == 0x8E:
cct = value
if plain == "" or cct == "":
raise SwError(SW["ERR_SECMESSOBJECTSMISSING"])
else:
my_cct = vsCrypto.crypto_checksum(algo, key, plain, iv)
if my_cct == cct:
return ""
else:
raise SwError["ERR_SECMESSOBJECTSINCORRECT"]示例3: compute_cryptographic_checksum
# 需要导入模块: from virtualsmartcard import CryptoUtils [as 别名]
# 或者: from virtualsmartcard.CryptoUtils import crypto_checksum [as 别名]
def compute_cryptographic_checksum(self, p1, p2, data):
"""
Compute a cryptographic checksum (e.g. MAC) for the given data.
Algorithm and key are specified in the current SE
"""
if p1 != 0x8E or p2 != 0x80:
raise SwError(SW["ERR_INCORRECTP1P2"])
if self.cct.key is None:
raise SwError(SW["ERR_CONDITIONNOTSATISFIED"])
checksum = vsCrypto.crypto_checksum(self.cct.algorithm, self.cct.key, data, self.cct.iv)
return checksum示例4: compute_cryptographic_checksum
# 需要导入模块: from virtualsmartcard import CryptoUtils [as 别名]
# 或者: from virtualsmartcard.CryptoUtils import crypto_checksum [as 别名]
def compute_cryptographic_checksum(self, p1, p2, data):
"""
Compute a cryptographic checksum (e.g. MAC) for the given data.
The ePass uses a Send Sequence Counter for MAC calculation
"""
if p1 != 0x8E or p2 != 0x80:
raise SwError(SW["ERR_INCORRECTP1P2"])
self.ssc += 1
checksum = vsCrypto.crypto_checksum(self.cct.algorithm, self.cct.key,
data, self.cct.iv, self.ssc)
return checksum