def main():
key = b'YELLOW SUBMARINE'
with open('c7.txt') as f:
text = f.read().replace('\n', '')
text = base642bytes(bytes(text, 'utf-8'))
msg = aes_decrypt_ecb(text, key)
assert(aes_decrypt_ecb(aes_encrypt_ecb(msg, key), key) == msg)
print(msg)
def main():
assert (hamming_dist(b'this is a test', b'wokka wokka!!!') == 37)
with open('c6.txt') as file:
text = file.read().replace('\n', '')
text = base642bytes(bytes(text, 'utf-8'))
[key, plainText] = break_repeat_key_xor(text)
assert (key == b'Terminator X: Bring the noise')
print(key)
print('\n\n', plainText)
def main():
unknownString = base642bytes(
b'Um9sbGluJyBpbiBteSA1LjAKV2l0aCBteSByYWctdG9wIGRvd24gc28gbXkgaGFpciBjYW4gYmxvdwpUaGUgZ2lybGllcyBvbiBzdGFuZGJ5IHdhdmluZyBqdXN0IHRvIHNheSBoaQpEaWQgeW91IHN0b3A/IE5vLCBJIGp1c3QgZHJvdmUgYnkK'
)
ecbOracle = HarderECBOracle(unknownString)
assert (len(ecbOracle.randomPrefix) == discover_prefix_length(ecbOracle))
assert (len(
ecbOracle.unknownString) == discover_unknown_string_length(ecbOracle))
discoveredString = harder_byte_ecb_decryption(ecbOracle)
# assert(discoveredString == unknownString)
print(discoveredString)
def main():
unknownString = base642bytes(
b'Um9sbGluJyBpbiBteSA1LjAKV2l0aCBteSByYWctdG9wIGRvd24gc28gbXkgaGFpciBjYW4gYmxvdwpUaGUgZ2lybGllcyBvbiBzdGFuZGJ5IHdhdmluZyBqdXN0IHRvIHNheSBoaQpEaWQgeW91IHN0b3A/IE5vLCBJIGp1c3QgZHJvdmUgYnkK'
)
ecbOracle = ECBOracle(unknownString)
blockLength = discover_block_size(ecbOracle)
assert (blockLength == AES.block_size)
assert (discover_ecb(ecbOracle, blockLength) == 'ECB')
assert (discover_unknown_string_length(ecbOracle) == len(
ecbOracle.unknownString))
discoveredString = byte_ecb_decryption(ecbOracle)
assert (discoveredString == unknownString)
print(discoveredString)
def main():
with open('c10.txt') as f:
text = base642bytes(bytes(f.read().replace('\n', ''), 'utf-8'))
blockSize = 16
key = 'YELLOW SUBMARINE'
iv = b'\x00' * blockSize
print(aes_decrypt_cbc(text, key, iv, True), '\n\n')
# verify
assert (aes_decrypt_cbc(aes_encrypt_cbc(b'Hello World', key, iv, True),
key, iv, True) == b'Hello World')
# show cases of optional unpadding
print(
aes_decrypt_cbc(aes_encrypt_cbc(b'Hello World', key, iv, True), key,
iv, False))