#IrisCTF2024 # https://en.wikipedia.org/wiki/Salsa20#ChaCha20_adoption from Crypto.Util.number import long_to_bytes, bytes_to_long import secrets def ROTL(a, b): return (((a) << (b)) | ((a % 2**32) >> (32 - (b)))) % 2**32 def qr(x, a, b, c…

#pbctf_2021 #rbtree #!/usr/bin/env python3 import random from flag import flag def keygen(ln): # Generate a linearly independent key arr = [ 1 << i for i in range(ln) ] for i in range(ln): for j in range(i): if random.getrandbits(1): arr[j…

#pbctf_2021 #rbtree #!/usr/bin/env python3 import random from flag import flag def keygen(ln): # Generate a linearly independent key arr = [ 1 << i for i in range(ln) ] for i in range(ln): for j in range(i): if random.getrandbits(1): arr[j…