Task 3

import hashlib
start = 0x10000000 # Start with a four byte hex literal.
end = 0xffffffff

# OTP from PCAP
#b7519dbe34acf21e29e687c20b42b8805b4db9935bf7f73b352d1caccb02a566

# SHA3-256 Hashed OTP
hash1 = '8b34947f13ce9014bfeccb41861c4350ff7d3f1f7bb92f112a82b7a0c81af96d'

# Loop through all possible 4-byte hex combinations, hash with sha3-256, and compare first 8 characters.
for i in range(start, end +1):
 var = hashlib.sha3_256((format(i, 'x')).encode('utf-8'))
 var_hexdigest = var.hexdigest()
 if var_hexdigest[:8] == hash1[:8]:
 #if var_hexdigest == hash1:
  print('bytes:', format(i, 'x'), '  hash:', var_hexdigest)