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744 lines
24 KiB
744 lines
24 KiB
import base64
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from datetime import timedelta as td
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from secrets import token_bytes
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from urllib.parse import urlparse
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import time
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import uuid
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from django.db import transaction
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from django.conf import settings
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from django.contrib import messages
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from django.contrib.auth import login as auth_login
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from django.contrib.auth import logout as auth_logout
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from django.contrib.auth import authenticate, update_session_auth_hash
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from django.contrib.auth.decorators import login_required
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from django.contrib.auth.models import User
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from django.core import signing
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from django.http import HttpResponse, HttpResponseForbidden, HttpResponseBadRequest
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from django.shortcuts import get_object_or_404, redirect, render
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from django.utils.timezone import now
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from django.urls import resolve, reverse, Resolver404
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from django.views.decorators.csrf import csrf_exempt
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from django.views.decorators.http import require_POST
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from fido2.ctap2 import AttestationObject, AuthenticatorData
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from fido2.client import ClientData
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from fido2.server import Fido2Server
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from fido2.webauthn import PublicKeyCredentialRpEntity
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from fido2 import cbor
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from hc.accounts import forms
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from hc.accounts.decorators import require_sudo_mode
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from hc.accounts.models import Credential, Profile, Project, Member
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from hc.api.models import Channel, Check, TokenBucket
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from hc.payments.models import Subscription
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POST_LOGIN_ROUTES = (
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"hc-checks",
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"hc-details",
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"hc-log",
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"hc-channels",
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"hc-add-slack",
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"hc-add-pushover",
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"hc-add-telegram",
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"hc-project-settings",
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"hc-uncloak",
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)
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FIDO2_SERVER = Fido2Server(PublicKeyCredentialRpEntity(settings.RP_ID, "healthchecks"))
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def _allow_redirect(redirect_url):
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if not redirect_url:
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return False
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parsed = urlparse(redirect_url)
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try:
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match = resolve(parsed.path)
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except Resolver404:
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return False
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return match.url_name in POST_LOGIN_ROUTES
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def _make_user(email, tz=None, with_project=True):
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username = str(uuid.uuid4())[:30]
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user = User(username=username, email=email)
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user.set_unusable_password()
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user.save()
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project = None
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if with_project:
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project = Project(owner=user)
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project.badge_key = user.username
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project.save()
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check = Check(project=project)
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check.name = "My First Check"
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check.save()
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channel = Channel(project=project)
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channel.kind = "email"
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channel.value = email
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channel.email_verified = True
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channel.save()
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channel.checks.add(check)
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# Ensure a profile gets created
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profile = Profile.objects.for_user(user)
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if tz:
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profile.tz = tz
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profile.save()
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return user
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def _redirect_after_login(request):
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""" Redirect to the URL indicated in ?next= query parameter. """
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redirect_url = request.GET.get("next")
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if _allow_redirect(redirect_url):
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return redirect(redirect_url)
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if request.user.project_set.count() == 1:
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project = request.user.project_set.first()
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return redirect("hc-checks", project.code)
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return redirect("hc-index")
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def _check_2fa(request, user):
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if user.credentials.exists():
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# We have verified user's password or token, and now must
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# verify their security key. We store the following in user's session:
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# - user.id, to look up the user in the login_webauthn view
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# - user.email, to make sure email was not changed between the auth steps
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# - timestamp, to limit the max time between the auth steps
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request.session["2fa_user"] = [user.id, user.email, int(time.time())]
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path = reverse("hc-login-webauthn")
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redirect_url = request.GET.get("next")
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if _allow_redirect(redirect_url):
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path += "?next=%s" % redirect_url
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return redirect(path)
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auth_login(request, user)
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return _redirect_after_login(request)
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def login(request):
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form = forms.PasswordLoginForm()
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magic_form = forms.EmailLoginForm()
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if request.method == "POST":
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if request.POST.get("action") == "login":
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form = forms.PasswordLoginForm(request.POST)
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if form.is_valid():
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return _check_2fa(request, form.user)
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else:
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magic_form = forms.EmailLoginForm(request.POST)
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if magic_form.is_valid():
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redirect_url = request.GET.get("next")
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if not _allow_redirect(redirect_url):
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redirect_url = None
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profile = Profile.objects.for_user(magic_form.user)
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profile.send_instant_login_link(redirect_url=redirect_url)
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response = redirect("hc-login-link-sent")
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# check_token_submit looks for this cookie to decide if
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# it needs to do the extra POST step.
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response.set_cookie("auto-login", "1", max_age=300, httponly=True)
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return response
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bad_link = request.session.pop("bad_link", None)
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ctx = {
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"page": "login",
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"form": form,
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"magic_form": magic_form,
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"bad_link": bad_link,
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"registration_open": settings.REGISTRATION_OPEN,
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"support_email": settings.SUPPORT_EMAIL,
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}
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return render(request, "accounts/login.html", ctx)
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def logout(request):
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auth_logout(request)
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return redirect("hc-index")
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@require_POST
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@csrf_exempt
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def signup(request):
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if not settings.REGISTRATION_OPEN:
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return HttpResponseForbidden()
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ctx = {}
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form = forms.SignupForm(request.POST)
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if form.is_valid():
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email = form.cleaned_data["identity"]
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tz = form.cleaned_data["tz"]
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user = _make_user(email, tz)
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profile = Profile.objects.for_user(user)
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profile.send_instant_login_link()
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ctx["created"] = True
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else:
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ctx = {"form": form}
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response = render(request, "accounts/signup_result.html", ctx)
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if ctx.get("created"):
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response.set_cookie("auto-login", "1", max_age=300, httponly=True)
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return response
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def login_link_sent(request):
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return render(request, "accounts/login_link_sent.html")
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def check_token(request, username, token):
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if request.user.is_authenticated and request.user.username == username:
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# User is already logged in
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return _redirect_after_login(request)
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# Some email servers open links in emails to check for malicious content.
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# To work around this, we sign user in if the method is POST
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# *or* if the browser presents a cookie we had set when sending the login link.
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#
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# If the method is GET and the auto-login cookie isn't present, we serve
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# a HTML form with a submit button.
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if request.method == "POST" or "auto-login" in request.COOKIES:
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user = authenticate(username=username, token=token)
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if user is not None and user.is_active:
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user.profile.token = ""
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user.profile.save()
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return _check_2fa(request, user)
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request.session["bad_link"] = True
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return redirect("hc-login")
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return render(request, "accounts/check_token_submit.html")
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@login_required
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def profile(request):
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profile = request.profile
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ctx = {
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"page": "profile",
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"profile": profile,
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"my_projects_status": "default",
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"2fa_status": "default",
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"added_credential_name": request.session.pop("added_credential_name", ""),
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"removed_credential_name": request.session.pop("removed_credential_name", ""),
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"credentials": list(request.user.credentials.order_by("id")),
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"use_2fa": settings.RP_ID,
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}
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if ctx["added_credential_name"]:
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ctx["2fa_status"] = "success"
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if ctx["removed_credential_name"]:
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ctx["2fa_status"] = "info"
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if request.session.pop("changed_password", False):
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ctx["changed_password"] = True
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ctx["email_password_status"] = "success"
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if request.method == "POST" and "leave_project" in request.POST:
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code = request.POST["code"]
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try:
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project = Project.objects.get(code=code, member__user=request.user)
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except Project.DoesNotExist:
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return HttpResponseBadRequest()
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Member.objects.filter(project=project, user=request.user).delete()
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ctx["left_project"] = project
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ctx["my_projects_status"] = "info"
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return render(request, "accounts/profile.html", ctx)
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@login_required
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@require_POST
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def add_project(request):
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form = forms.ProjectNameForm(request.POST)
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if not form.is_valid():
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return HttpResponseBadRequest()
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project = Project(owner=request.user)
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project.code = project.badge_key = str(uuid.uuid4())
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project.name = form.cleaned_data["name"]
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project.save()
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return redirect("hc-checks", project.code)
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@login_required
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def project(request, code):
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project = get_object_or_404(Project, code=code)
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is_owner = project.owner_id == request.user.id
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if request.user.is_superuser or is_owner:
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rw = True
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else:
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membership = get_object_or_404(Member, project=project, user=request.user)
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rw = membership.rw
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ctx = {
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"page": "project",
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"rw": rw,
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"project": project,
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"is_owner": is_owner,
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"show_api_keys": "show_api_keys" in request.GET,
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"enable_prometheus": settings.PROMETHEUS_ENABLED is True,
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}
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if request.method == "POST":
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if not rw:
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return HttpResponseForbidden()
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if "create_api_keys" in request.POST:
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project.set_api_keys()
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project.save()
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ctx["show_api_keys"] = True
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ctx["api_keys_created"] = True
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ctx["api_status"] = "success"
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elif "revoke_api_keys" in request.POST:
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project.api_key = ""
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project.api_key_readonly = ""
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project.save()
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ctx["api_keys_revoked"] = True
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ctx["api_status"] = "info"
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elif "show_api_keys" in request.POST:
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ctx["show_api_keys"] = True
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elif "invite_team_member" in request.POST:
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if not is_owner:
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return HttpResponseForbidden()
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form = forms.InviteTeamMemberForm(request.POST)
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if form.is_valid():
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email = form.cleaned_data["email"]
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invite_suggestions = project.invite_suggestions()
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if not invite_suggestions.filter(email=email).exists():
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# We're inviting a new user. Are we within team size limit?
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if not project.can_invite_new_users():
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return HttpResponseForbidden()
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# And are we not hitting a rate limit?
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if not TokenBucket.authorize_invite(request.user):
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return render(request, "try_later.html")
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try:
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user = User.objects.get(email=email)
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except User.DoesNotExist:
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user = _make_user(email, with_project=False)
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if project.invite(user, rw=form.cleaned_data["rw"]):
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ctx["team_member_invited"] = email
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ctx["team_status"] = "success"
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else:
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ctx["team_member_duplicate"] = email
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ctx["team_status"] = "info"
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elif "remove_team_member" in request.POST:
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if not is_owner:
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return HttpResponseForbidden()
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form = forms.RemoveTeamMemberForm(request.POST)
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if form.is_valid():
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q = User.objects
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q = q.filter(email=form.cleaned_data["email"])
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q = q.filter(memberships__project=project)
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farewell_user = q.first()
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if farewell_user is None:
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return HttpResponseBadRequest()
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Member.objects.filter(project=project, user=farewell_user).delete()
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ctx["team_member_removed"] = form.cleaned_data["email"]
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ctx["team_status"] = "info"
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elif "set_project_name" in request.POST:
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form = forms.ProjectNameForm(request.POST)
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if form.is_valid():
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project.name = form.cleaned_data["name"]
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project.save()
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ctx["project_name_updated"] = True
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ctx["project_name_status"] = "success"
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elif "transfer_project" in request.POST:
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if not is_owner:
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return HttpResponseForbidden()
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form = forms.TransferForm(request.POST)
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if form.is_valid():
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# Look up the proposed new owner
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email = form.cleaned_data["email"]
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try:
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membership = project.member_set.filter(user__email=email).get()
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except Member.DoesNotExist:
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return HttpResponseBadRequest()
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# Revoke any previous transfer requests
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project.member_set.update(transfer_request_date=None)
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# Initiate the new request
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membership.transfer_request_date = now()
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membership.save()
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# Send an email notification
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profile = Profile.objects.for_user(membership.user)
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profile.send_transfer_request(project)
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ctx["transfer_initiated"] = True
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ctx["transfer_status"] = "success"
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elif "cancel_transfer" in request.POST:
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if not is_owner:
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return HttpResponseForbidden()
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project.member_set.update(transfer_request_date=None)
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ctx["transfer_cancelled"] = True
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ctx["transfer_status"] = "success"
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elif "accept_transfer" in request.POST:
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tr = project.transfer_request()
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if not tr or tr.user != request.user:
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return HttpResponseForbidden()
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if not tr.can_accept():
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return HttpResponseBadRequest()
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with transaction.atomic():
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# 1. Reuse the existing membership, and change its user
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tr.user = project.owner
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tr.transfer_request_date = None
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tr.save()
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# 2. Change project's owner
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project.owner = request.user
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project.save()
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ctx["is_owner"] = True
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messages.success(request, "You are now the owner of this project!")
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elif "reject_transfer" in request.POST:
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tr = project.transfer_request()
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if not tr or tr.user != request.user:
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return HttpResponseForbidden()
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tr.transfer_request_date = None
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tr.save()
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return render(request, "accounts/project.html", ctx)
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@login_required
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def notifications(request):
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profile = request.profile
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ctx = {"status": "default", "page": "profile", "profile": profile}
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if request.method == "POST":
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form = forms.ReportSettingsForm(request.POST)
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if form.is_valid():
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if form.cleaned_data["tz"]:
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profile.tz = form.cleaned_data["tz"]
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profile.reports = form.cleaned_data["reports"]
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profile.next_report_date = profile.choose_next_report_date()
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profile.reports_allowed = profile.reports != "off"
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if profile.nag_period != form.cleaned_data["nag_period"]:
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# Set the new nag period
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profile.nag_period = form.cleaned_data["nag_period"]
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# and update next_nag_date:
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if profile.nag_period:
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profile.update_next_nag_date()
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else:
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profile.next_nag_date = None
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profile.save()
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ctx["status"] = "info"
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return render(request, "accounts/notifications.html", ctx)
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@login_required
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@require_sudo_mode
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def set_password(request):
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if request.method == "POST":
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form = forms.SetPasswordForm(request.POST)
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if form.is_valid():
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password = form.cleaned_data["password"]
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request.user.set_password(password)
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request.user.save()
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request.profile.token = ""
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request.profile.save()
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# update the session with the new password hash so that
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# the user doesn't get logged out
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update_session_auth_hash(request, request.user)
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request.session["changed_password"] = True
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return redirect("hc-profile")
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return render(request, "accounts/set_password.html", {})
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@login_required
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@require_sudo_mode
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def change_email(request):
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if request.method == "POST":
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form = forms.ChangeEmailForm(request.POST)
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if form.is_valid():
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request.user.email = form.cleaned_data["email"]
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request.user.set_unusable_password()
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request.user.save()
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request.profile.token = ""
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request.profile.save()
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return redirect("hc-change-email-done")
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else:
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form = forms.ChangeEmailForm()
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return render(request, "accounts/change_email.html", {"form": form})
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def change_email_done(request):
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return render(request, "accounts/change_email_done.html")
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@csrf_exempt
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def unsubscribe_reports(request, signed_username):
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# Some email servers open links in emails to check for malicious content.
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# To work around this, for GET requests we serve a confirmation form.
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# If the signature is more than 5 minutes old, we also include JS code to
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# auto-submit the form.
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ctx = {}
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signer = signing.TimestampSigner(salt="reports")
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# First, check the signature without looking at the timestamp:
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try:
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username = signer.unsign(signed_username)
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except signing.BadSignature:
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return render(request, "bad_link.html")
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|
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# Check if timestamp is older than 5 minutes:
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try:
|
|
username = signer.unsign(signed_username, max_age=300)
|
|
except signing.SignatureExpired:
|
|
ctx["autosubmit"] = True
|
|
|
|
if request.method != "POST":
|
|
return render(request, "accounts/unsubscribe_submit.html", ctx)
|
|
|
|
user = User.objects.get(username=username)
|
|
profile = Profile.objects.for_user(user)
|
|
profile.reports = "off"
|
|
profile.reports_allowed = False
|
|
profile.next_report_date = None
|
|
profile.nag_period = td()
|
|
profile.next_nag_date = None
|
|
profile.save()
|
|
|
|
return render(request, "accounts/unsubscribed.html")
|
|
|
|
|
|
@login_required
|
|
@require_sudo_mode
|
|
def close(request):
|
|
user = request.user
|
|
|
|
if request.method == "POST":
|
|
if request.POST.get("confirmation") == request.user.email:
|
|
# Cancel their subscription:
|
|
sub = Subscription.objects.filter(user=user).first()
|
|
if sub:
|
|
sub.cancel()
|
|
|
|
# Deleting user also deletes its profile, checks, channels etc.
|
|
user.delete()
|
|
|
|
request.session.flush()
|
|
return redirect("hc-index")
|
|
|
|
ctx = {}
|
|
if "confirmation" in request.POST:
|
|
ctx["wrong_confirmation"] = True
|
|
|
|
return render(request, "accounts/close_account.html", ctx)
|
|
|
|
|
|
@require_POST
|
|
@login_required
|
|
def remove_project(request, code):
|
|
project = get_object_or_404(Project, code=code, owner=request.user)
|
|
project.delete()
|
|
return redirect("hc-index")
|
|
|
|
|
|
def _get_credential_data(request, form):
|
|
""" Complete WebAuthn registration, return binary credential data.
|
|
|
|
This function is an interface to the fido2 library. It is separated
|
|
out so that we don't need to mock ClientData, AttestationObject,
|
|
register_complete separately in tests.
|
|
|
|
"""
|
|
|
|
try:
|
|
auth_data = FIDO2_SERVER.register_complete(
|
|
request.session["state"],
|
|
ClientData(form.cleaned_data["client_data_json"]),
|
|
AttestationObject(form.cleaned_data["attestation_object"]),
|
|
)
|
|
except ValueError:
|
|
return None
|
|
|
|
return auth_data.credential_data
|
|
|
|
|
|
@login_required
|
|
@require_sudo_mode
|
|
def add_credential(request):
|
|
if not settings.RP_ID:
|
|
return HttpResponse(status=404)
|
|
|
|
if request.method == "POST":
|
|
form = forms.AddCredentialForm(request.POST)
|
|
if not form.is_valid():
|
|
return HttpResponseBadRequest()
|
|
|
|
credential_data = _get_credential_data(request, form)
|
|
if not credential_data:
|
|
return HttpResponseBadRequest()
|
|
|
|
c = Credential(user=request.user)
|
|
c.name = form.cleaned_data["name"]
|
|
c.data = credential_data
|
|
c.save()
|
|
|
|
request.session["added_credential_name"] = c.name
|
|
return redirect("hc-profile")
|
|
|
|
credentials = [c.unpack() for c in request.user.credentials.all()]
|
|
# User handle is used in a username-less authentication, to map a credential
|
|
# received from browser with an user account in the database.
|
|
# Since we only use security keys as a second factor,
|
|
# the user handle is not of much use to us.
|
|
#
|
|
# The user handle:
|
|
# - must not be blank,
|
|
# - must not be a constant value,
|
|
# - must not contain personally identifiable information.
|
|
# So we use random bytes, and don't store them on our end:
|
|
options, state = FIDO2_SERVER.register_begin(
|
|
{
|
|
"id": token_bytes(16),
|
|
"name": request.user.email,
|
|
"displayName": request.user.email,
|
|
},
|
|
credentials,
|
|
)
|
|
|
|
request.session["state"] = state
|
|
|
|
ctx = {"options": base64.b64encode(cbor.encode(options)).decode()}
|
|
return render(request, "accounts/add_credential.html", ctx)
|
|
|
|
|
|
@login_required
|
|
@require_sudo_mode
|
|
def remove_credential(request, code):
|
|
if not settings.RP_ID:
|
|
return HttpResponse(status=404)
|
|
|
|
try:
|
|
credential = Credential.objects.get(user=request.user, code=code)
|
|
except Credential.DoesNotExist:
|
|
return HttpResponseBadRequest()
|
|
|
|
if request.method == "POST" and "remove_credential" in request.POST:
|
|
request.session["removed_credential_name"] = credential.name
|
|
credential.delete()
|
|
return redirect("hc-profile")
|
|
|
|
ctx = {"credential": credential, "is_last": request.user.credentials.count() == 1}
|
|
return render(request, "accounts/remove_credential.html", ctx)
|
|
|
|
|
|
def _check_credential(request, form, credentials):
|
|
""" Complete WebAuthn authentication, return True on success.
|
|
|
|
This function is an interface to the fido2 library. It is separated
|
|
out so that we don't need to mock ClientData, AuthenticatorData,
|
|
authenticate_complete separately in tests.
|
|
|
|
"""
|
|
|
|
try:
|
|
FIDO2_SERVER.authenticate_complete(
|
|
request.session["state"],
|
|
credentials,
|
|
form.cleaned_data["credential_id"],
|
|
ClientData(form.cleaned_data["client_data_json"]),
|
|
AuthenticatorData(form.cleaned_data["authenticator_data"]),
|
|
form.cleaned_data["signature"],
|
|
)
|
|
except ValueError:
|
|
return False
|
|
|
|
return True
|
|
|
|
|
|
def login_webauthn(request):
|
|
# We require RP_ID. Fail predicably if it is not set:
|
|
if not settings.RP_ID:
|
|
return HttpResponse(status=500)
|
|
|
|
# Expect an unauthenticated user
|
|
if request.user.is_authenticated:
|
|
return HttpResponseBadRequest()
|
|
|
|
if "2fa_user" not in request.session:
|
|
return HttpResponseBadRequest()
|
|
|
|
user_id, email, timestamp = request.session["2fa_user"]
|
|
if timestamp + 300 < time.time():
|
|
return redirect("hc-login")
|
|
|
|
try:
|
|
user = User.objects.get(id=user_id, email=email)
|
|
except User.DoesNotExist:
|
|
return HttpResponseBadRequest()
|
|
|
|
credentials = [c.unpack() for c in user.credentials.all()]
|
|
|
|
if request.method == "POST":
|
|
form = forms.WebAuthnForm(request.POST)
|
|
if not form.is_valid():
|
|
return HttpResponseBadRequest()
|
|
|
|
if not _check_credential(request, form, credentials):
|
|
return HttpResponseBadRequest()
|
|
|
|
request.session.pop("state")
|
|
request.session.pop("2fa_user")
|
|
auth_login(request, user, "hc.accounts.backends.EmailBackend")
|
|
return _redirect_after_login(request)
|
|
|
|
options, state = FIDO2_SERVER.authenticate_begin(credentials)
|
|
request.session["state"] = state
|
|
|
|
ctx = {"options": base64.b64encode(cbor.encode(options)).decode()}
|
|
return render(request, "accounts/login_webauthn.html", ctx)
|