kelalaka153 / cbc-bit-flipping-attack Goto Github PK

In python3, the bitFlip def seems to be broken - this is a working version:

def bitFlip( pos, bit, data):
    raw = b64decode(data)
    list1 = list(raw)
    list1[pos] = list1[pos] ^ bit
    raw = bytes(list1)
    return b64encode(bytes(raw))

I'm wondering if this code only works if the IV is prepended to the ciphertext.

1. I made the iv a global variable and removed it from the encrypt/decrypt data. So now only the ciphertext is passed as data.
2. Removed padding and changed msg to "12345678901234561234567890123456" (the first error I got was the Padding error)
3. Now I'm getting random plaintext no matter how I call the bitFlip method.

Am I missing something?