Verify jupyter / ipython password hashlib

verify_password.py

import hashlib
import sys

if len(sys.argv) != 3:
    sys.exit("Usage: python3 verify.py hash passphrase")

provided_hash = sys.argv[1]
passphrase = sys.argv[2]
salt = provided_hash.split(":")[1]

h = hashlib.new("sha1")
h.update(passphrase.encode("utf-8") + salt.encode("ascii"))
new_hash = ":".join(("sha1", salt, h.digest().hex()))

if new_hash == provided_hash:
    print("OK")
else:
    sys.exit("The provided passphrase is wrong")