class CryptoPan():
def __init__(self, key):
if len(key) != 32:
raise CryptoPanError("Key must be a 32 byte long string")
self.aes = AES(key[0:16])
self.pad = self.aes.encrypt(key[16:32])
f4 = self.pad[0:4]
# Python 2 requires explicit conversion to ints
if isinstance(f4, str):
f4 = [ord(x) for x in f4]
f4bp = self.toint(f4)
self.masks = [(mask, f4bp & (~mask))
for mask in (0xFFFFFFFF >> (32 - p) << (32 - p)
for p in range(0, 32))]
def toint(self, array):
return array[0] << 24 | array[1] << 16 | array[2] << 8 | array[3]
def toarray(self, n):
for i in range(3, -1, -1):
yield (n >> (i * 8)) & 0xFF
def anonymize(self, ip):
result = 0
address = [int(x) for x in ip.split(".")]
if len(address) != 4:
raise CryptoPanError("Invalid IPv4 Address")
address = self.toint(address)
def calc(a):
""" calculate the first bit for Crypto-PAN"""
a_array = self.toarray(a)
# Python 2 requires converting ints to chars one at a time
if isinstance(self.pad, str):
inp = "".join((chr(x) for x in a_array))
else:
inp = bytes(a_array)
inp += self.pad[4:]
rin_output = self.aes.encrypt(inp)
out = rin_output[0]
# Python 2 requires explicit conversion to int
if isinstance(out, str):
out = ord(out)
return out >> 7
addresses = ((address & mask[0]) | mask[1] for mask in self.masks)
result = reduce(lambda x, y: x << 1 | y, (calc(a) for a in addresses),
0)
return ".".join(["%s" % x for x in self.toarray(result ^ address)])
class CryptoPan():
def __init__(self,key):
if len(key)!=32:
raise CryptoPanError("Key must be a 32 byte long string")
self.aes=AES(key[0:16])
self.pad=self.aes.encrypt(key[16:32])
f4=self.pad[0:4]
# Python 2 requires explicit conversion to ints
if isinstance(f4, str):
f4=[ord(x) for x in f4]
f4bp=self.toint(f4)
self.masks=[(mask,f4bp & (~ mask)) for mask in (0xFFFFFFFF >> (32-p) << (32-p) for p in range(0,32))]
def toint(self,array):
return array[0]<<24|array[1]<<16|array[2]<<8|array[3]
def toarray(self,n):
for i in range(3,-1,-1):
yield (n>>(i*8))& 0xFF
def anonymize(self,ip):
result=0
address=[int(x) for x in ip.split(".")]
if len(address)!=4:
raise CryptoPanError("Invalid IPv4 Address")
address=self.toint(address)
def calc(a):
""" calculate the first bit for Crypto-PAN"""
a_array = self.toarray(a)
# Python 2 requires converting ints to chars one at a time
if isinstance(self.pad, str):
inp="".join((chr(x) for x in a_array))
else:
inp=bytes(a_array)
inp+=self.pad[4:]
rin_output=self.aes.encrypt(inp)
out=rin_output[0]
# Python 2 requires explicit conversion to int
if isinstance(out, str):
out=ord(out)
return out>>7
addresses=((address & mask[0]) | mask[1] for mask in self.masks)
result=reduce(lambda x,y: x<<1 | y, (calc(a) for a in addresses),0)
return ".".join(["%s"%x for x in self.toarray(result ^ address)])
def __init__(self, key):
if len(key) != 32:
raise CryptoPanError("Key must be a 32 byte long string")
self.aes = AES(key[0:16])
self.pad = self.aes.encrypt(key[16:32])
pad_int = sum(ord(c) << (i * 8) for i, c in enumerate(self.pad[::-1]))
self.masks = [(mask, pad_int & (~ mask))
for mask in ((2 ** 128 - 1) >> (128 - p) << (128 - p) for p in range(0, 128))]
class CryptoPan():
def __init__(self, key):
if len(key) != 32:
raise CryptoPanError("Key must be a 32 byte long string")
self.aes = AES(key[0:16])
self.pad = self.aes.encrypt(key[16:32])
pad_int = sum(ord(c) << (i * 8) for i, c in enumerate(self.pad[::-1]))
self.masks = [(mask, pad_int & (~ mask))
for mask in ((2 ** 128 - 1) >> (128 - p) << (128 - p) for p in range(0, 128))]
def pack(self, val, num_bytes):
return "".join([chr(val >> i * 8 & 0xff) for i in xrange(num_bytes - 1, -1, -1)])
def anonymize(self, ip_in):
ip = IPAddress(ip_in)
if ip.version == 4:
address_bytes = 4
address = ip.value << (128 - 32)
else:
address_bytes = 16
address = ip.value
def calc(a):
""" calculate the first bit for Crypto-PAN"""
# a is a number, convert to a string
rin_input = self.pack(a, 16)
rin_output = self.aes.encrypt(rin_input)
out = rin_output[0]
return ord(out) >> 7
addresses = ((address & mask[0]) | mask[1] for mask in self.masks[0:address_bytes * 8])
result = reduce(
lambda x, y: x << 1 | y,
(calc(a) for a in addresses),
0)
return IPAddress(result ^ ip.value)
def __init__(self, key):
if len(key)!=32:
raise CryptoPanError("Key must be a 32 byte long string")
self.aes=AES(key[0:16])
self.pad=self.aes.encrypt(key[16:32])
f4=self.pad[0:4]
# Python 2 requires explicit conversion to ints
if isinstance(f4, str):
f4=[ord(x) for x in f4]
f4bp=self.toint(f4)
self.masks=[(mask, f4bp & (~ mask)) for mask in (0xFFFFFFFF >> (32 - p) << (32 - p) for p in range(0, 32))]
def __init__(self,key):
if len(key)!=32:
raise CryptoPanError("Key must be a 32 byte long string")
self.aes=AES(key[0:16])
self.pad=self.aes.encrypt(key[16:32])
f4=self.pad[0:4]
# Python 2 requires explicit conversion to ints
if isinstance(f4, str):
f4=[ord(x) for x in f4]
f4bp=self.toint(f4)
self.masks=[(mask,f4bp & (~ mask)) for mask in (0xFFFFFFFF >> (32-p) << (32-p) for p in range(0,32))]
def encrypt(self, text):
key = self.key
cryptor = AES_new(key, MODE_EAX, key)
return b64encode(cryptor.encrypt(text.encode()))
