def c2():
EXAMPLE_INPUT = ( \
'1c0111001f010100061a024b53535009181c',
'686974207468652062756c6c277320657965'
)
EXAMPLE_OUTPUT = '746865206b696420646f6e277420706c6179'
plain, key = map(crypto.hex_to_bytes, EXAMPLE_INPUT)
result = crypto.fixed_xor(plain, key)
result = crypto.bytes_to_hex(result)
print(result)
expect(result, EXAMPLE_OUTPUT)
def c5():
PLAINTEXT = "Burning 'em, if you ain't quick and nimble\n" + \
"I go crazy when I hear a cymbal"
KEY = 'ICE'
EXAMPLE_OUTPUT = '0b3637272a2b2e63622c2e69692a23693a2a3c6324202d623d63343c2a26226324272765272' + \
'a282b2f20430a652e2c652a3124333a653e2b2027630c692b20283165286326302e27282f'
plain, key = map(crypto.str_to_bytes, (PLAINTEXT, KEY))
cipher = crypto.fixed_xor(plain, key)
result = crypto.bytes_to_hex(cipher)
print(result)
expect(result, EXAMPLE_OUTPUT)
def c6():
HAMMING_INPUTS = ('this is a test','wokka wokka!!!')
distance = textutils.hamming_distance(*map(crypto.str_to_bytes, HAMMING_INPUTS))
expect(distance, 37)
with open('inputs/6.txt') as f:
cipher = f.read()
cipher = crypto.base64_to_bytes(cipher)
keysize = crypto.brute_xor_keysize(cipher)
print('Guessing the key size is {0}'.format(keysize))
key = crypto.brute_xor_key(cipher, keysize)
print('Key: {0}'.format(key))
plain = crypto.fixed_xor(cipher, crypto.str_to_bytes(key))
print ('Plain: {0}'.format(plain.decode('utf-8')))
