Cryptohack

A website teaching Cryptography.

Default Boilerplate Script

from Crypto.Cipher import AES
from Crypto.Util.Padding import pad, unpad
import requests
import os
import binascii
from datetime import datetime, timedelta
 
def send_req(msg : str) -> str:
    r = requests.get(f'https://aes.cryptohack.org/ecbcbcwtf/decrypt/{msg}/')
    if r.status_code == 200:
        return r.json()['plaintext']
    else:
        return ""
 
def xor_bytes(one : bytes, two : bytes) -> bytes:
    return bytes(a ^ b for (a, b) in zip(one, two))
 
def and_bytes(a : bytes, b : bytes) -> bytes:
    return bytes([_a & b for _a, _b in zip(a, b)])
 
def bytes_to_bitstring(b : bytes) -> str:
	return ''.join(f"{byte:08b}" for byte in b)
 
def bitstring_to_bytes(s):
    integer_value = int(s, 2)
    byte_length = (len(s) + 7) // 8
    return integer_value.to_bytes(byte_length, byteorder='big')
 
def hexstring_to_bytes(hexstr : str) -> bytes:
    return bytes.fromhex(hexstr)
 
def bytes_to_hexstring(b : bytes) -> str:
    return binascii.hexlify(b).decode('utf-8')
    
def xor_hexstring(one : str, two : str) -> str:
    return bytes_to_hexstring(xor_bytes(hexstring_to_bytes(one), hexstring_to_bytes(two)))