sha2_constants.py

#!/usr/bin/env python3
# date: 2019-01-02
# license: GPLv3 https://www.gnu.org/licenses/gpl-3.0.txt
# author: nanpuyue <nanpuyue@gmail.com> https://blog.nanpuyue.com

def sha2_iv(n: int) -> int:
  square_root = pow(n, 1/2)
  decimal = square_root - int(square_root)
  return int(decimal * 0x100000000)

def sha2_it(n: int) -> int:
  cube_root = pow(n, 1/3)
  decimal = cube_root - int(cube_root)
  return int(decimal * 0x100000000)

def is_prime_number(n: int, pn_list: list) -> bool:
  for pn in pn_list:
    if n % pn == 0:
      return False
  return True

def for_prime_number_do(count: int, f):
  i = 0
  n = 2
  prime_number_list = []
  while i < count:
    if is_prime_number(n, prime_number_list):
      prime_number_list.append(n)
      i += 1
      print("0x%08x" % f(n), end=", ")
      if i % 8 == 0:
        print()
    n += 1

print("Initialize variables:")
for_prime_number_do(8, sha2_iv)
print("\nInitialize table:")
for_prime_number_do(64, sha2_it)

Output

Initialize variables:
0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19, 

Initialize table:
0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, 
0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, 
0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, 
0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967, 
0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, 
0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070, 
0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3, 
0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2,