Commit graph

3 commits

Author SHA1 Message Date
William Carroll
fad38387af feat(wpcarro/cryptopals): Support repeating key cipher
I think this is a form of symmetric encryption where the passphrase (e.g. "ICE")
is repeated (e.g. "ICEICEICEICEI...") until it matches the length of the
cleartext string; after that, the two byte-strings are XOR'd against one another
and then encoded as hexadecimal creating the ciphertext.

Change-Id: Ib148f06d6c42a41377d1df1f0738d77da935a9f6
Reviewed-on: https://cl.tvl.fyi/c/depot/+/4789
Tested-by: BuildkiteCI
Reviewed-by: wpcarro <wpcarro@gmail.com>
Autosubmit: wpcarro <wpcarro@gmail.com>
2022-01-08 05:51:16 +00:00
William Carroll
7aaddb3d31 fix(wpcarro/cryptopals): Update cleartext scoring algorithm
Create a frequency table of alphabetic characters by reading each character in
"Alice in Wonderland"; use this frequency table to score cleartext when decoding
ciphers.

Change-Id: Id322af64d792c15231a1a02794f396c46196c207
Reviewed-on: https://cl.tvl.fyi/c/depot/+/4788
Tested-by: BuildkiteCI
Reviewed-by: wpcarro <wpcarro@gmail.com>
Autosubmit: wpcarro <wpcarro@gmail.com>
2022-01-08 05:51:15 +00:00
William Carroll
4cf86f2e53 feat(wpcarro/scratch): Upload my solutions to cryptopals
More beginner problems/solutions for CTF-style challenges.

Change-Id: Ide229e99e3ccc1ede5a5ca1c2ad039498e49ea4c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/4740
Reviewed-by: wpcarro <wpcarro@gmail.com>
Autosubmit: wpcarro <wpcarro@gmail.com>
Tested-by: BuildkiteCI
2021-12-29 19:34:02 +00:00