Index out of range error in cryptanalib.evaluate_vigenere_key_length

[kaushiksk]

The code

import cryptanalib as ca
ca.evaluate_vigenere_key_length("ucoizsbtkxhtadcg", 10)

Traceback

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "cryptanalib/classical.py", line 226, in evaluate_vigenere_key_length
    ioc_list.append(ind_of_coinc(ciphertext, length))
  File "cryptanalib/classical.py", line 188, in ind_of_coinc
    freq[offset][to_number(text[i*distance+offset])] += 1
IndexError: list index out of range

Get the same error for max_length = 5, 20 as well

[unicornsasfuel]

I'll have to dig into this. This was contributed code I'm not super familiar with. Thank you for the report!

[kaushiksk]

Let me know if you need any help!

[unicornsasfuel]

I would welcome help, pull requests are accepted as long as they respect the contributing rules.