Python3 examples

One liner

from sha256bit import Sha256bit
print(Sha256bit("abc".encode()).hexdigest())

ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad

Bit length capability

One liner

from sha256bit import Sha256bit
print(Sha256bit(b'\x00',bitlen=1).hexdigest())

bd4f9e98beb68c6ead3243b1b4c7fed75fa4feaab1f84795cbd8a98676a2a375

Update / digest

from sha256bit import Sha256bit
h = Sha256bit()
h.update(b'\x00',bitlen=1)
print(h.hexdigest())

bd4f9e98beb68c6ead3243b1b4c7fed75fa4feaab1f84795cbd8a98676a2a375

Import / export

from sha256bit import Sha256bit
h1 = Sha256bit("a".encode())
state = h1.export_state()
h2 = Sha256bit.import_state(state)
h2.update("bc".encode())
print(h2.hexdigest())

ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad

Dumping intermediate values

This is useful to people working on their own implemention of SHA256. The verbosity is controlled by the logging level.

Use ‘INFO’ to dump block level information
Use ‘DEBUG’ to dump all intermediate values

import logging
from sha256bit import Sha256bit
logging.basicConfig(format='%(message)s', level='INFO')
print(Sha256bit("abc".encode()).hexdigest())

bitlen: 24
state:  6A 09 E6 67 BB 67 AE 85 3C 6E F3 72 A5 4F F5 3A 51 0E 52 7F 9B 05 68 8C 1F 83 D9 AB 5B E0 CD 19
block:  61 62 63 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 18
digest: BA 78 16 BF 8F 01 CF EA 41 41 40 DE 5D AE 22 23 B0 03 61 A3 96 17 7A 9C B4 10 FF 61 F2 00 15 AD
ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad

import logging
from pysatl import Utils
from sha256bit import Sha256bit
logging.basicConfig(format='%(message)s', level='INFO')
message = Utils.ba('E3 B0 C4 42 98 FC 1C 14 9A FB F4 C8 99 6F B9 24 27 AE 41 E4 64 9B 93 4C A4 95 99 1B 78 52 B8 55 5D F6 E0 E2 76 13 59 D3 0A 82 75 05 8E 29 9F CC 03 81 53 45 45 F5 5C F4 3E 41 98 3F 5D 4C 94 56 5F E4 46 3C')
h1 = Sha256bit(message[0:64])
state = h1.export_state()
h2 = Sha256bit.import_state(state)
h2.update(message[64:])
print(h2.hexdigest())

state:  6A 09 E6 67 BB 67 AE 85 3C 6E F3 72 A5 4F F5 3A 51 0E 52 7F 9B 05 68 8C 1F 83 D9 AB 5B E0 CD 19
block:  E3 B0 C4 42 98 FC 1C 14 9A FB F4 C8 99 6F B9 24 27 AE 41 E4 64 9B 93 4C A4 95 99 1B 78 52 B8 55 5D F6 E0 E2 76 13 59 D3 0A 82 75 05 8E 29 9F CC 03 81 53 45 45 F5 5C F4 3E 41 98 3F 5D 4C 94 56
exporting current state:
  bitlen = 512
  state:  9F BF AC E6 3F D1 4E 52 19 13 7C 71 F6 23 23 5F 63 2B 67 BB 02 7A 79 F3 90 E9 80 96 02 BE 40 E2
  cache:
importing current state:
  bitlen = 512
  state:  9F BF AC E6 3F D1 4E 52 19 13 7C 71 F6 23 23 5F 63 2B 67 BB 02 7A 79 F3 90 E9 80 96 02 BE 40 E2
  cache:
bitlen: 544
state:  9F BF AC E6 3F D1 4E 52 19 13 7C 71 F6 23 23 5F 63 2B 67 BB 02 7A 79 F3 90 E9 80 96 02 BE 40 E2
block:  5F E4 46 3C 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 20
digest: CC 87 D0 D0 0E E7 4D 5B 2F 47 17 77 70 FF 78 4F 5A 72 B1 89 33 14 65 33 FB C1 BC AC 6C 70 07 B9
cc87d0d00ee74d5b2f47177770ff784f5a72b18933146533fbc1bcac6c7007b9