Re-implement guru vpn script

scripts/guru-sophos-password

@@ -0,0 +1,7 @@
+#! /bin/bash
+set -e
+
+BASE_PW=$(op read "op://t4auhpfxnrrtyvfml4kysvgb2i/rqinfxfqr7z5e2gmix6beiqcxy/password")
+OTP=$(op read "op://t4auhpfxnrrtyvfml4kysvgb2i/rqinfxfqr7z5e2gmix6beiqcxy/one-time password?attribute=otp")
+
+echo ${BASE_PW}${OTP}

scripts/guru-vpn

@@ -1,142 +1,37 @@
-#! /usr/bin/env python3
-import argparse
-import sys
-import subprocess
-from typing import Optional
+#! /bin/bash
+set -e
 
+# Require 1 argument (connect or disconnect)
+if [ -z "$1" ]; then
+    echo "Usage: guru-vpn <connect|disconnect>"
+    exit 1
+fi
 
-def has_ykman() -> bool:
-    try:
-        subprocess.run(["ykman", "--version"], check=True, stdout=subprocess.DEVNULL)
-        return True
-    except subprocess.CalledProcessError:
-        return False
+# If we are told to disconnect
+if [ "$1" == "disconnect" ]; then
+    echo "Disconnecting..."
+    nmcli connection down "Guru VPN"
+    exit 0
+fi
 
+# If we are told to connect
+if [ "$1" == "connect" ]; then
+    # Attempt to disconnect, just in case we are on a stale connection
+    echo "Attempting to leave stale connection if it exists"
+    nmcli connection down "Guru VPN" | true
 
-def has_yk_plugged_in() -> bool:
-    devices = subprocess.run(["ykman", "list"], check=True, stdout=subprocess.PIPE)
-    devices = devices.stdout.decode("utf-8").split("\n")
-    return len(devices) > 1
+    # Generate the password
+    echo "Constructing one-time password"
+    vpn_pass=$(guru-sophos-password)
 
+    # Connect
+    echo "Connecting..."
+    nmcli connection modify "Guru VPN" vpn.secrets "password=${vpn_pass}"
+    nmcli connection up "Guru VPN"
 
-def is_interface_up(interface: str) -> bool:
-    try:
-        subprocess.run(
-            ["ip", "link", "show", interface], check=True, stdout=subprocess.DEVNULL
-        )
-        return True
-    except subprocess.CalledProcessError:
-        return False
+    exit 0
+fi
 
-
-def get_oath_code(service: str) -> Optional[int]:
-    response = subprocess.run(
-        ["ykman", "oath", "accounts", "code", "Guru"],
-        check=True,
-        stdout=subprocess.PIPE,
-    )
-    output = response.stdout.decode("utf-8")
-    if not output:
-        return None
-    return int(output.split("\n")[0].split(" ")[-1])
-
-
-def get_password(label: str, ns: str, key: str) -> str:
-    # Try to find it
-    try:
-        result = subprocess.run(
-            ["secret-tool", "lookup", ns, key], check=True, stdout=subprocess.PIPE
-        )
-        return result.stdout.decode("utf-8")
-    except subprocess.CalledProcessError:
-        # If we are here, it doesn't exist
-        print(f"Enter your {label}")
-        subprocess.run(["secret-tool", "store", "--label", label, ns, key], check=True)
-        return get_password(label, ns, key)
-
-
-def handle_connect(args: argparse.Namespace) -> int:
-    if not has_yk_plugged_in():
-        print("Could not find YubiKey. Is it plugged in?", file=sys.stderr)
-        return 1
-
-    # If we are connected to AS54041, we need to briefly kill the connection
-    if args.wireguard_support and is_interface_up("vpn"):
-        print("Bringing down AS54041 VPN")
-        subprocess.run(["sudo", "wg-quick", "down", "vpn"], check=True)
-
-    # Get the base password
-    base_password = get_password("Guru VPN Password", "guru-vpn", "base-password")
-
-    # Fetch the credentials from the Yubikey
-    oath_code = get_oath_code("Guru")
-    print(f"Using OATH code: {oath_code}")
-    if not len(str(oath_code)) == 6:
-        print("Invalid OATH code length. Try again in a minute.", file=sys.stderr)
-        return 1
-
-    # Construct the one-time password
-    password = f"{base_password}{oath_code}"
-
-    # Connect via nmcli
-    print("Bringing up Guru VPN")
-    subprocess.run(
-        [
-            "nmcli",
-            "connection",
-            "modify",
-            "Guru VPN",
-            "vpn.secrets",
-            f"password={password}",
-        ],
-        check=True,
-    )
-    subprocess.run(["nmcli", "connection", "up", "Guru VPN"], check=True)
-
-    # Bring AS54041 back up
-    print("Bringing up AS54041 VPN")
-    if args.wireguard_support:
-        subprocess.run(["sudo", "wg-quick", "up", "vpn"], check=True)
-
-
-def handle_disconnect(args: argparse.Namespace) -> int:
-    # Disconnect from Guru VPN
-    print("Bringing down Guru VPN")
-    result = subprocess.run(["nmcli", "connection", "down", "Guru VPN"])
-    return 0
-   
-
-
-def main() -> int:
-    # Handle program arguments
-    ap = argparse.ArgumentParser(
-        prog="guru-vpn", description="Utility for connecting to the Guru VPN"
-    )
-    ap.add_argument(
-        "operation",
-        choices=["connect", "disconnect", "reconnect"],
-        help="Operation to perform",
-    )
-    ap.add_argument(
-        "-w",
-        "--wireguard-support",
-        help="Handles wireguard interfaces",
-        action="store_true",
-    )
-    args = ap.parse_args()
-
-    # Ensure we can actually get credentials from the Yubikey
-    if not has_ykman():
-        print("Could not execute `ykman`. Is it installed?", file=sys.stderr)
-        return 1
-
-    # Handle subcommands
-    cmd_fns = {
-        "connect": lambda args: handle_disconnect(args) or handle_connect(args),
-        "disconnect": handle_disconnect,
-    }
-    return cmd_fns[args.operation](args)
-
-
-if __name__ == "__main__":
-    sys.exit(main())
+# If we are here, we were given an invalid command
+echo "Usage: guru-vpn <connect|disconnect>"
+exit 1