def testXorBuffers(self):
self.assertEqual(
"746865206b696420646f6e277420706c6179",
hex_encode(xor_fixed_length_buffers(
hex_decode("1c0111001f010100061a024b53535009181c")[0],
hex_decode("686974207468652062756c6c277320657965")[0]
))[0]
)
def testDetectSingleByteXorCipher(self):
with open("4.txt", "rb") as file_handle:
results = {}
for ciphertext_encoded in file_handle:
ciphertext = hex_decode(ciphertext_encoded.rstrip())[0]
key_guess = find_single_byte_cipher_key(ciphertext)
plaintext = xor_fixed_length_buffers(ciphertext, key_guess*len(ciphertext))
score = english_score(plaintext)
results[plaintext] = { "score" : score, "key" : key_guess }
sorted_list = sorted(results, key=lambda(k): results[k]["score"], reverse=True)
self.assertEqual("Now that the party is jumping\n", sorted_list[0])
def hexstring_to_b64(hex_string):
binary_string = hex_decode(hex_string)[0]
return b64encode(binary_string)
def testSingleByteXorDecryption(self):
ciphertext = hex_decode("1b37373331363f78151b7f2b783431333d78397828372d363c78373e783a393b3736")[0]
guess = find_single_byte_cipher_key(ciphertext)
plaintext = xor_fixed_length_buffers(ciphertext, guess*len(ciphertext))
self.assertEqual("Cooking MC's like a pound of bacon", plaintext)