app-MAIL-temp/app/dashboard/views/fido_setup.py

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