def c7():
KEY = 'YELLOW SUBMARINE'
with open('inputs/7.txt') as f:
cipher = f.read()
cipher = crypto.base64_to_bytes(cipher)
key = crypto.str_to_bytes(KEY)
plain = crypto.decrypt_AES_ECB(cipher, key)
print('Plain: {0}'.format(plain.decode('utf-8')))
def c10():
INPUT_KEY = 'YELLOW SUBMARINE'
with open('inputs/10.txt') as f:
cipher = f.read()
cipher = crypto.base64_to_bytes(cipher)
key = crypto.str_to_bytes(INPUT_KEY)
plain = crypto.decrypt_AES_CBC(cipher, key)
print(plain)
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')))
def c10():
# My own test data
message = 'The crow flies from the chicken coop at dawn.'
key = b'YeLlOw SuBmArInE'
blocksize = len(key)
iv = bytes([randrange(0, 256) for i in range(0, blocksize)])
cryptbytes = crypto.encrypt_aes_cbc(crypto.str_to_bytes(message), iv, key)
print('Encrypted: %r' % cryptbytes)
plainbytes = crypto.decrypt_aes_cbc(cryptbytes, iv, key)
print('Decrypted: %r' % plainbytes.decode())
expect(plainbytes.decode(), message)
# Decrypt the example from Cryptopals
key = b'YELLOW SUBMARINE'
blocksize = len(key)
iv = bytes([0] * blocksize)
cryptbytes = crypto.base64_to_bytes(open('inputs/10.txt').read())
decrypted = crypto.decrypt_aes_cbc(cryptbytes, iv, key)
print(decrypted.decode())
def c6():
b64text = open('inputs/6.txt').read()
cipherbytes = crypto.base64_to_bytes(b64text)
keysizes = crypto.brute_keysize(cipherbytes)
keyrange = [[byte] for byte in range(0, 255)]
# Identify key candidates by trying single byte keys, spaced keysize
# bytes apart.
key_candidates = []
for keysize in keysizes:
chunks = crypto.split_every_n_bytes(cipherbytes, keysize)
key = b''
for chunk in chunks:
k, text = crypto.brute_xor(chunk, keyrange)
key += bytes(k)
key_candidates.append(key)
# Now run the key candidates and find the winner.
key, text = crypto.brute_xor(cipherbytes, key_candidates)
print('Decrypted with key: %s' % key.decode())
print('%s' % text)
def c10():
# My own test data
message = 'The crow flies from the chicken coop at dawn.'
key = b'YeLlOw SuBmArInE'
blocksize = len(key)
iv = bytes([randrange(0, 256) for i in range(0, blocksize)])
cryptbytes = crypto.encrypt_aes_cbc(crypto.str_to_bytes(message), iv, key)
print('Encrypted: %r' % cryptbytes)
plainbytes = crypto.decrypt_aes_cbc(cryptbytes, iv, key)
print('Decrypted: %r' % plainbytes.decode())
expect(plainbytes.decode(), message)
# Decrypt the example from Cryptopals
key = b'YELLOW SUBMARINE'
blocksize = len(key)
iv = bytes([0]*blocksize)
cryptbytes = crypto.base64_to_bytes(open('inputs/10.txt').read())
decrypted = crypto.decrypt_aes_cbc(cryptbytes, iv, key)
print(decrypted.decode())
def c6():
b64text = open('inputs/6.txt').read()
cipherbytes = crypto.base64_to_bytes(b64text)
keysizes = crypto.brute_keysize(cipherbytes)
keyrange = [[byte] for byte in range(0, 255)]
# Identify key candidates by trying single byte keys, spaced keysize
# bytes apart.
key_candidates = []
for keysize in keysizes:
chunks = crypto.split_every_n_bytes(cipherbytes, keysize)
key = b''
for chunk in chunks:
k, text = crypto.brute_xor(chunk, keyrange)
key += bytes(k)
key_candidates.append(key)
# Now run the key candidates and find the winner.
key, text = crypto.brute_xor(cipherbytes, key_candidates)
print('Decrypted with key: %s' % key.decode())
print('%s' % text)
def c7():
b64text = open('inputs/7.txt').read()
cryptbytes = crypto.base64_to_bytes(b64text)
text = crypto.decrypt_aes_ecb(cryptbytes, b'YELLOW SUBMARINE').decode()
print('Decrypted:')
print('%s' % text)
def c7():
b64text = open('inputs/7.txt').read()
cryptbytes = crypto.base64_to_bytes(b64text)
text = crypto.decrypt_aes_ecb(cryptbytes, b'YELLOW SUBMARINE').decode()
print('Decrypted:')
print('%s' % text)
