wpa_passphrase.py

#!/usr/bin/env python3
# wpa_passphrase - Generate a WPA PSK from an ASCII passphrase for a SSID
# usage: wpa_passphrase <ssid> [passphrase]

import sys
from hashlib import pbkdf2_hmac
from getpass import getpass

if len(sys.argv) < 2 or len(sys.argv) > 3:
    print("usage: wpa_passphrase <ssid> [passphrase]", file = sys.stderr)
    sys.exit(1)
ssid = sys.argv[1].encode('utf-8')
if len(sys.argv) == 2:
    passphrase = getpass('passphrase: ').encode('utf-8')
else:
    passphrase = sys.argv[2].encode('utf-8')

psk = pbkdf2_hmac('sha1', passphrase, ssid, 4096, 32).hex()

print(f'network={{\n\tssid="{ssid}"\n\tpsk={psk}\n}}')