app-MAIL-temp/app/dashboard/views/fido_setup.py
2021-11-22 15:57:51 +01:00

127 lines
4.1 KiB
Python

import json
import secrets
import uuid
import webauthn
from flask import render_template, flash, redirect, url_for, session
from flask_login import login_required, current_user
from flask_wtf import FlaskForm
from wtforms import StringField, HiddenField, validators
from app.config import RP_ID, URL
from app.dashboard.base import dashboard_bp
from app.dashboard.views.enter_sudo import sudo_required
from app.db import Session
from app.log import LOG
from app.models import Fido, RecoveryCode
class FidoTokenForm(FlaskForm):
key_name = StringField("key_name", validators=[validators.DataRequired()])
sk_assertion = HiddenField("sk_assertion", validators=[validators.DataRequired()])
@dashboard_bp.route("/fido_setup", methods=["GET", "POST"])
@login_required
@sudo_required
def fido_setup():
if current_user.fido_uuid is not None:
fidos = Fido.filter_by(uuid=current_user.fido_uuid).all()
else:
fidos = []
fido_token_form = FidoTokenForm()
# Handling POST requests
if fido_token_form.validate_on_submit():
try:
sk_assertion = json.loads(fido_token_form.sk_assertion.data)
except Exception:
flash("Key registration failed. Error: Invalid Payload", "warning")
return redirect(url_for("dashboard.index"))
fido_uuid = session["fido_uuid"]
challenge = session["fido_challenge"]
fido_reg_response = webauthn.WebAuthnRegistrationResponse(
RP_ID,
URL,
sk_assertion,
challenge,
trusted_attestation_cert_required=False,
none_attestation_permitted=True,
)
try:
fido_credential = fido_reg_response.verify()
except Exception as e:
LOG.w(f"An error occurred in WebAuthn registration process: {e}")
flash("Key registration failed.", "warning")
return redirect(url_for("dashboard.index"))
if current_user.fido_uuid is None:
current_user.fido_uuid = fido_uuid
Session.flush()
Fido.create(
credential_id=str(fido_credential.credential_id, "utf-8"),
uuid=fido_uuid,
public_key=str(fido_credential.public_key, "utf-8"),
sign_count=fido_credential.sign_count,
name=fido_token_form.key_name.data,
user_id=current_user.id,
)
Session.commit()
LOG.d(
f"credential_id={str(fido_credential.credential_id, 'utf-8')} added for {fido_uuid}"
)
flash("Security key has been activated", "success")
if not RecoveryCode.filter_by(user_id=current_user.id).all():
return redirect(url_for("dashboard.recovery_code_route"))
else:
return redirect(url_for("dashboard.fido_manage"))
# Prepare information for key registration process
fido_uuid = (
str(uuid.uuid4()) if current_user.fido_uuid is None else current_user.fido_uuid
)
challenge = secrets.token_urlsafe(32)
credential_create_options = webauthn.WebAuthnMakeCredentialOptions(
challenge,
"SimpleLogin",
RP_ID,
fido_uuid,
current_user.email,
current_user.name if current_user.name else current_user.email,
False,
attestation="none",
user_verification="discouraged",
)
# Don't think this one should be used, but it's not configurable by arguments
# https://www.w3.org/TR/webauthn/#sctn-location-extension
registration_dict = credential_create_options.registration_dict
del registration_dict["extensions"]["webauthn.loc"]
# Prevent user from adding duplicated keys
for fido in fidos:
registration_dict["excludeCredentials"].append(
{
"type": "public-key",
"id": fido.credential_id,
"transports": ["usb", "nfc", "ble", "internal"],
}
)
session["fido_uuid"] = fido_uuid
session["fido_challenge"] = challenge.rstrip("=")
return render_template(
"dashboard/fido_setup.html",
fido_token_form=fido_token_form,
credential_create_options=registration_dict,
)