127 lines
4.1 KiB
Python
127 lines
4.1 KiB
Python
import json
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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
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from flask_login import login_required, current_user
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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
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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()])
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@dashboard_bp.route("/fido_setup", methods=["GET", "POST"])
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@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
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if fido_token_form.validate_on_submit():
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try:
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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"]
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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,
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challenge,
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trusted_attestation_cert_required=False,
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none_attestation_permitted=True,
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)
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try:
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fido_credential = fido_reg_response.verify()
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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:
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current_user.fido_uuid = fido_uuid
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Session.flush()
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Fido.create(
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credential_id=str(fido_credential.credential_id, "utf-8"),
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uuid=fido_uuid,
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public_key=str(fido_credential.public_key, "utf-8"),
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sign_count=fido_credential.sign_count,
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name=fido_token_form.key_name.data,
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user_id=current_user.id,
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)
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Session.commit()
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LOG.d(
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f"credential_id={str(fido_credential.credential_id, 'utf-8')} added for {fido_uuid}"
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)
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flash("Security key has been activated", "success")
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recovery_codes = RecoveryCode.generate(current_user)
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return render_template(
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"dashboard/recovery_code.html", recovery_codes=recovery_codes
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)
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# Prepare information for key registration process
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fido_uuid = (
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str(uuid.uuid4()) if current_user.fido_uuid is None else current_user.fido_uuid
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)
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challenge = secrets.token_urlsafe(32)
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credential_create_options = webauthn.WebAuthnMakeCredentialOptions(
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challenge,
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"SimpleLogin",
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RP_ID,
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fido_uuid,
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current_user.email,
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current_user.name if current_user.name else current_user.email,
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False,
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attestation="none",
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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
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# https://www.w3.org/TR/webauthn/#sctn-location-extension
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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(
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{
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"type": "public-key",
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"id": fido.credential_id,
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"transports": ["usb", "nfc", "ble", "internal"],
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}
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)
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session["fido_uuid"] = fido_uuid
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session["fido_challenge"] = challenge.rstrip("=")
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return render_template(
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"dashboard/fido_setup.html",
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fido_token_form=fido_token_form,
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credential_create_options=registration_dict,
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)
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