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#!/usr/bin/env python3
"""OpenVPN wrapper with OTP authentication."""
import os
import sys
from pathlib import Path
import mintotp
import pexpect
def main():
"""Entrypoint."""
child = pexpect.spawn(f"openvpn --config {os.environ['OPENVPN_CONFIG_FILE']}")
child.logfile = sys.stdout.buffer
child.expect("CHALLENGE: Verification code:")
child.sendline(
mintotp.totp(Path(os.environ["OPENVPN_OTP_SECRET_FILE"]).read_text().strip())
)
# macos - python script: pexpect hangs on child.wait()? - Stack Overflow
# https://stackoverflow.com/questions/58751357/python-script-pexpect-hangs-on-child-wait
while True:
try:
child.read_nonblocking()
except Exception:
break
if child.isalive():
child.wait()
if __name__ == "__main__":
main()
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