def encryptionOracle(data):
extraData = Binary(
'Um9sbGluJyBpbiBteSA1LjAKV2l0aCBteSByYWctdG9wIGRvd24gc28gbXkgaGFpciBjYW4gYmxvdwpUaGUgZ2lybGllcyBvbiBzdGFuZGJ5IHdhdmluZyBqdXN0IHRvIHNheSBoaQpEaWQgeW91IHN0b3A/IE5vLCBJIGp1c3QgZHJvdmUgYnkK',
64)
data = data + extraData
c = Crypto(data)
c.encAES_ECB(randomKey)
return c.data
def createProfileAndProvide(email):
if isinstance(email, Binary):
email = email.toAscii()
profile = profile_for(email)
c = Crypto(Binary(profile, 128))
c.encAES_ECB(randomKey)
cipher = c.data
return cipher
def encryptionOracle(data):
randomKey = Binary.random(8 * 16)
addBefore = Binary.random(random.randrange(5, 11) * 8)
addAfter = Binary.random(random.randrange(5, 11) * 8)
data = addBefore + data + addAfter
IV = Binary.random(8 * 16)
c = Crypto(data)
if random.randrange(2):
c.encAES_ECB(randomKey)
mode = 'ECB'
else:
c.encAES_CBC(randomKey, IV)
mode = 'CBC'
return (mode, c.data)
from Tools import Crypto
from Tools import Binary
data = ''
with open('./ch6.txt') as file:
for line in file:
data += line.rstrip()
binary = Crypto(data, 64)
keys = binary.decXOR()
binary.xor(Binary(keys[0], 128))
print(binary.data.toAscii())
from Tools import Crypto, Binary
b = Binary('ICE ICE BABY', 128)
print(Binary(Crypto.removePadding(b + Binary('04040404', 16))).toAscii())
try:
Crypto.removePadding(b + Binary('05050505', 16))
except:
print('Caught exception')
try:
Crypto.removePadding(b + Binary('01020304', 16))
except:
print('Caught exception')
print('Passed!')
from Tools import Crypto
from Tools import Binary
text = 'Burning \'em, if you ain\'t quick and nimble\nI go crazy when I hear a cymbal'
key = Binary('ICE', 128)
e = Crypto(text, 128)
e.xor(key)
result = e.toHex()
expected = '0b3637272a2b2e63622c2e69692a23693a2a3c6324202d623d63343c2a26226324272765272a282b2f20430a652e2c652a3124333a653e2b2027630c692b20283165286326302e27282f'
if result == expected:
print('Passed!')
else:
print(result)
print(expected)
def decryptProfile(profile):
c = Crypto(profile.toHex(), 16)
c.decAES_ECB(randomKey)
parsedProfile = parseParams(c.toAscii())
print(parsedProfile)
from Tools import Binary, Crypto
data = ''
key = Binary('YELLOW SUBMARINE', 128)
with open('./ch10.txt') as file:
for line in file:
data += line.rstrip()
data = Binary(data, 64)
IV = Binary('0' * 32, 16)
c = Crypto(data)
c.decAES_CBC(key, IV)
print(c.toAscii())
def __main__():
print(Crypto.decECB(encryptionOracle))
from Tools import Crypto
with open('./ch4.txt') as file:
bestResult = (0, '', '')
i = 1
for line in file:
d = Crypto(line.rstrip(), 16)
result = d.decSingleCharXOR()
if result[0] > bestResult[0]:
bestResult = result
i += 1
print(bestResult[2])
from Tools import Crypto
from Tools import Binary
data = ''
key = Binary('YELLOW SUBMARINE', 128)
with open('./ch7.txt') as file:
for line in file:
data += line.rstrip()
binary = Crypto(Binary(data, 64))
binary.decAES_ECB(key)
print(binary.toAscii())
from ch12 import encryptionOracle
from Tools import Binary, Crypto
import random
randomPrefix = Binary().random(random.randrange(0, 30 * 8, 8))
def wrapper(data):
return encryptionOracle(randomPrefix + data)
print(Crypto.decECB(wrapper))