Encryption and decryption with SHA-256

sha256-crypto.py

#!/usr/bin/python

import hashlib

nonce = 0
key = 'f3q4uszyt67cfatq'
pad = hashlib.sha256(str(nonce)+key).digest()

# encrypt
plaintext = 'the quick brown fox jumped over.'
ciphertext = ''
for i in range(32):
  ciphertext += chr(ord(pad[i])^ord(plaintext[i]))
  
# ciphertext = '\x1bf\x13\r\x0c\xc4\x18`\x129\x16\x12|\x96\xa7\xc2\xf5E_\x97\xc2\x010\x88]j\xce\xe3x\x14\xe8\xb6'

# decrypt
plaintext = ''
for i in range(32):
  plaintext += chr(ord(pad[i]^ord(ciphertext[i]))

# plaintext = 'the quick brown fox jumped over.'

4d07cfd21cb3b4c6c2aedb05456f5299629ea7b6b80a48004d3ef5e06b8d9e25

4d07cfd21cb3b4c6c2aedb05456f5299629ea7b6b80a48004d3ef5e06b8d9e25

I got "azerty"