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Generate an /etc/shadow compatible passphrase.
#!/usr/bin/env python3
from crypt import crypt
from getpass import getpass
from random import SystemRandom ; random = SystemRandom()
from string import ascii_lowercase, ascii_uppercase, digits
salt_chars = ascii_lowercase + ascii_uppercase + digits
# generate a SHA-512 passphrase from user input with a 16 byte random salt
passphrase = crypt(getpass(), "$6${}".format(''.join([random.choice(salt_chars) for i in range(16)])))
# print the output
print(passphrase)
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