def createAES(key, IV, implList=None):
"""Create a new AES object.
@type key: str
@param key: A 16, 24, or 32 byte string.
@type IV: str
@param IV: A 16 byte string
@rtype: L{tlslite.utils.AES}
@return: An AES object.
"""
if implList == None:
implList = ["openssl", "tlscrypto", "pycrypto", "python"]
for impl in implList:
if impl == "openssl" and cryptomath.m2cryptoLoaded:
return openssl_aes.new(key, 2, IV)
elif impl == "tlscrypto" and cryptomath.tlscryptoLoaded:
return tlscrypto_aes.new(key, 2, IV)
elif impl == "pycrypto" and cryptomath.pycryptoLoaded:
return pycrypto_aes.new(key, 2, IV)
elif impl == "python":
return python_aes.new(key, 2, IV)
raise NotImplementedError()
def createAES(key, IV, implList=None):
"""Create a new AES object.
@type key: str
@param key: A 16, 24, or 32 byte string.
@type IV: str
@param IV: A 16 byte string
@rtype: L{tlslite.utils.AES}
@return: An AES object.
"""
if implList is None:
implList = ["openssl", "pycrypto", "python"]
for impl in implList:
if impl == "openssl" and cryptomath.m2cryptoLoaded:
return openssl_aes.new(key, 2, IV)
elif impl == "pycrypto" and cryptomath.pycryptoLoaded:
return pycrypto_aes.new(key, 2, IV)
elif impl == "python":
return python_aes.new(key, 2, IV)
raise NotImplementedError()
def __init__(self, key, implementation, rawAesEncrypt, tagLength):
super(OPENSSL_AESCCM, self).__init__(key, implementation,
rawAesEncrypt, tagLength)
self._ctr = openssl_aes.new(key, 6, bytearray(b'\x00' * 16))
self._cbc = openssl_aes.new(key, 2, bytearray(b'\x00' * 16))