random.py

#!/usr/bin/env python3

import os
import sys
# import bz2
from datetime import datetime
# from hashlib import blake2b

BYTE_COUNT = 1000
BASE_TIME = 60 # in seconds

def main():
  start_time = datetime.now()
  t = str(start_time.microsecond)[-1]
  run_time = BASE_TIME + (10 * int(t))

  # generate a number from 0 to 65535 (2 bytes)
  seed = 0
  count = 0
  while True:
    if count == 10000:
      now = datetime.now()
      if (now - start_time).seconds > run_time:
        break
      count = 0
    count += 1
    seed = (seed + 1) % 65535

  a = (seed & (0xFF << 8)) >> 8 # first byte
  m = seed & 0xFF # second byte

  # generate bytes
  results = bytes([a])
  for i in range(BYTE_COUNT - 1):
    p = results[i]
    results += bytes([m])
    m = ((p + 2) * (m + 2)) % 255
    # h = blake2b(digest_size=1)
    # h.update(bytes([m]))
    # m = int.from_bytes(h.digest(), 'big')

  # b2 = bz2.BZ2Compressor()
  # b2.compress(results)
  # results = b2.flush()
  with os.fdopen(sys.stdout.fileno(), 'wb') as f:
    f.write(results)

if __name__ == "__main__":
  main()