def encipher(self, p1, p2, data):
"""
Encipher data using key, algorithm, IV and Padding specified
by the current Security environment.
:returns: raw data (no TLV coding).
"""
algo = self.ct.algorithm
key = self.ct.key
if key == None or algo == None:
raise SwError(SW["ERR_CONDITIONNOTSATISFIED"])
else:
padded = vsCrypto.append_padding(vsCrypto.get_cipher_blocklen(algo), data)
crypted = vsCrypto.encrypt(algo, key, padded, self.ct.iv)
return crypted
def encipher(self, p1, p2, data):
"""
Encipher data using key, algorithm, IV and Padding specified
by the current Security environment.
:returns: raw data (no TLV coding).
"""
algo = self.ct.algorithm
key = self.ct.key
if key == None or algo == None:
raise SwError(SW["ERR_CONDITIONNOTSATISFIED"])
else:
padded = vsCrypto.append_padding(vsCrypto.get_cipher_blocklen(algo), data)
crypted = vsCrypto.encrypt(algo, key, padded, self.ct.iv)
return crypted
def external_authenticate(self, p1, p2, data):
"""
Authenticate the terminal to the card. Check whether Terminal correctly
encrypted the given challenge or not
"""
if self.last_challenge is None:
raise SwError(SW["ERR_CONDITIONNOTSATISFIED"])
key = self._get_referenced_key(p1, p2)
if p1 == 0x00: #No information given
cipher = get_referenced_cipher(self.cipher)
else:
cipher = get_referenced_cipher(p1)
blocklen = vsCrypto.get_cipher_blocklen(cipher)
reference = vsCrypto.append_padding(blocklen, self.last_challenge)
reference = vsCrypto.encrypt(cipher, key, reference)
if (reference == data):
#Invalidate last challenge
self.last_challenge = None
return SW["NORMAL"], ""
else:
raise SwError(SW["WARN_NOINFO63"])
def external_authenticate(self, p1, p2, data):
"""
Authenticate the terminal to the card. Check whether Terminal correctly
encrypted the given challenge or not
"""
if self.last_challenge is None:
raise SwError(SW["ERR_CONDITIONNOTSATISFIED"])
key = self._get_referenced_key(p1, p2)
if p1 == 0x00: #No information given
cipher = get_referenced_cipher(self.cipher)
else:
cipher = get_referenced_cipher(p1)
blocklen = vsCrypto.get_cipher_blocklen(cipher)
reference = vsCrypto.append_padding(blocklen, self.last_challenge)
reference = vsCrypto.encrypt(cipher, key, reference)
if(reference == data):
#Invalidate last challenge
self.last_challenge = None
return SW["NORMAL"], ""
else:
raise SwError(SW["WARN_NOINFO63"])
