Generate OTP QR codes from Google Authenticator SQLite database

authenticator_gen_qr.py

#!/usr/bin/env python3

# pip3 install --user qrcode[pil]

import qrcode
import argparse
import sqlite3
import os

from urllib.parse import quote

if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument("auth_db", help="Path to the authenticator database")
    parser.add_argument("dest_dir", help="folder to store QRs in")

    args = parser.parse_args()

    os.makedirs(args.dest_dir, 0o755, True)

    with sqlite3.connect("file:%s?mode=ro" % args.auth_db, uri=True) as db:
        c =db.cursor()
        c.execute("SELECT original_name, issuer, secret FROM accounts;")
        for r in c:
            label = quote(r[0])
            params = [ f"secret={quote(r[2])}" ]
            if r[1] is not None:
                params.append(f"issuer={quote(r[1])}")
            uri = f"otpauth://totp/{label}?{'&'.join(params)}"
            print(uri)
            img = qrcode.make(uri)
            img.save(os.path.join(args.dest_dir, label + ".png"))