def test_bitlist_to_string(self):
string = 'foo'
bitlist = [
0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1,
1, 1
]
self.assertEqual(utils_misc.string_to_bitlist(string), bitlist)
def create_Kn(self):
"""
Create the 16 subkeys,from K[0] to K[15], from the given key
"""
key = self.get_sub_list(self.PC1, utils_misc.string_to_bitlist(self.getKey()))
self.L = key[:28]
self.R = key[28:]
for i in range(16):
# Perform circular left shifts
for j in range(self.left_rotations[i]):
self.L.append(self.L[0])
del self.L[0]
self.R.append(self.R[0])
del self.R[0]
# Create one of the 16 subkeys through pc2 permutation
self.Kn[i] = self.get_sub_list(self.PC2, self.L + self.R)
def create_Kn(self):
"""
Create the 16 subkeys,from K[0] to K[15], from the given key
"""
key = self.get_sub_list(
self.PC1, utils_misc.string_to_bitlist(self.getKey()))
self.L = key[:28]
self.R = key[28:]
for i in range(16):
# Perform circular left shifts
for j in range(self.left_rotations[i]):
self.L.append(self.L[0])
del self.L[0]
self.R.append(self.R[0])
del self.R[0]
# Create one of the 16 subkeys through pc2 permutation
self.Kn[i] = self.get_sub_list(self.PC2, self.L + self.R)
def crypt(self, data, crypt_type=0):
"""
Crypt the data in blocks, running it through des_crypt()
@param data: Data to be encrypted/decrypted.
@param crypt_type: crypt type. 0 means encrypt, and 1 means decrypt.
"""
# Split the data into list, crypting each one seperately
i = 0
result = []
while i < len(data):
# Test code for caching encryption results
block = utils_misc.string_to_bitlist(data[i : i + 8])
pro_block = self.des_crypt(block, crypt_type)
# Add the resulting block to our list
result.append(utils_misc.bitlist_to_string(pro_block))
i += 8
# Return the full encrypted/decrypted string
return "".join(result)
def crypt(self, data, crypt_type=0):
"""
Crypt the data in blocks, running it through des_crypt()
:param data: Data to be encrypted/decrypted.
:param crypt_type: crypt type. 0 means encrypt, and 1 means decrypt.
"""
# Split the data into list, crypting each one separately
i = 0
result = []
while i < len(data):
# Test code for caching encryption results
block = utils_misc.string_to_bitlist(data[i:i + 8])
pro_block = self.des_crypt(block, crypt_type)
# Add the resulting block to our list
result.append(utils_misc.bitlist_to_string(pro_block))
i += 8
# Return the full encrypted/decrypted string
return ''.join(result)
def test_bitlist_to_string(self):
string = 'foo'
bitlist = [0, 1, 1, 0, 0, 1, 1, 0, 0, 1,
1, 0, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1]
self.assertEqual(utils_misc.string_to_bitlist(string), bitlist)