# -*- coding: utf-8 -*-
#
import urllib.parse
import json
import base64
from typing import Callable
from django.conf import settings
from django.core.cache import cache
from django.shortcuts import get_object_or_404
from django.http import HttpResponse
from django.utils.translation import ugettext as _
from rest_framework.response import Response
from rest_framework.request import Request
from rest_framework.viewsets import GenericViewSet
from rest_framework.decorators import action
from rest_framework.exceptions import PermissionDenied
from rest_framework import serializers
from authentication.signals import post_auth_failed, post_auth_success
from common.utils import get_logger, random_string
from common.drf.api import SerializerMixin
from common.permissions import IsSuperUserOrAppUser, IsValidUser, IsSuperUser
from orgs.mixins.api import RootOrgViewMixin
from common.http import is_true
from ..serializers import (
ConnectionTokenSerializer, ConnectionTokenSecretSerializer,
)
logger = get_logger(__name__)
__all__ = ['UserConnectionTokenViewSet']
class ClientProtocolMixin:
request: Request
get_serializer: Callable
create_token: Callable
def get_request_resource(self, serializer):
asset = serializer.validated_data.get('asset')
application = serializer.validated_data.get('application')
system_user = serializer.validated_data['system_user']
user = serializer.validated_data.get('user')
if not user or not self.request.user.is_superuser:
user = self.request.user
return asset, application, system_user, user
def get_rdp_file_content(self, serializer):
options = {
'full address:s': '',
'username:s': '',
# 'screen mode id:i': '1',
# 'desktopwidth:i': '1280',
# 'desktopheight:i': '800',
'use multimon:i': '0',
'session bpp:i': '32',
'audiomode:i': '0',
'disable wallpaper:i': '0',
'disable full window drag:i': '0',
'disable menu anims:i': '0',
'disable themes:i': '0',
'alternate shell:s': '',
'shell working directory:s': '',
'authentication level:i': '2',
'connect to console:i': '0',
'disable cursor setting:i': '0',
'allow font smoothing:i': '1',
'allow desktop composition:i': '1',
'redirectprinters:i': '0',
'prompt for credentials on client:i': '0',
'autoreconnection enabled:i': '1',
'bookmarktype:i': '3',
'use redirection server name:i': '0',
'smart sizing:i': '0',
# 'domain:s': ''
# 'alternate shell:s:': '||MySQLWorkbench',
# 'remoteapplicationname:s': 'Firefox',
# 'remoteapplicationcmdline:s': '',
}
asset, application, system_user, user = self.get_request_resource(serializer)
height = self.request.query_params.get('height')
width = self.request.query_params.get('width')
full_screen = is_true(self.request.query_params.get('full_screen'))
token = self.create_token(user, asset, application, system_user)
options['screen mode id:i'] = '2' if full_screen else '1'
address = settings.TERMINAL_RDP_ADDR
if not address or address == 'localhost:3389':
address = self.request.get_host().split(':')[0] + ':3389'
options['full address:s'] = address
options['username:s'] = '{}|{}'.format(user.username, token)
if system_user.ad_domain:
options['domain:s'] = system_user.ad_domain
if width and height:
options['desktopwidth:i'] = width
options['desktopheight:i'] = height
else:
options['smart sizing:i'] = '1'
content = ''
for k, v in options.items():
content += f'{k}:{v}\n'
if asset:
name = asset.hostname
elif application:
name = application.name
else:
name = '*'
return name, content
@action(methods=['POST', 'GET'], detail=False, url_path='rdp/file', permission_classes=[IsValidUser])
def get_rdp_file(self, request, *args, **kwargs):
if self.request.method == 'GET':
data = self.request.query_params
else:
data = self.request.data
serializer = self.get_serializer(data=data)
serializer.is_valid(raise_exception=True)
name, data = self.get_rdp_file_content(serializer)
response = HttpResponse(data, content_type='application/octet-stream')
filename = "{}-{}-jumpserver.rdp".format(self.request.user.username, name)
filename = urllib.parse.quote(filename)
response['Content-Disposition'] = 'attachment; filename*=UTF-8\'\'%s' % filename
return response
def get_valid_serializer(self):
if self.request.method == 'GET':
data = self.request.query_params
else:
data = self.request.data
serializer = self.get_serializer(data=data)
serializer.is_valid(raise_exception=True)
return serializer
def get_client_protocol_data(self, serializer):
asset, application, system_user, user = self.get_request_resource(serializer)
protocol = system_user.protocol
if protocol == 'rdp':
name, config = self.get_rdp_file_content(serializer)
elif protocol == 'vnc':
raise HttpResponse(status=404, data={"error": "VNC not support"})
else:
config = 'ssh://system_user@asset@user@jumpserver-ssh'
data = {
"protocol": system_user.protocol,
"username": user.username,
"config": config
}
return data
@action(methods=['POST', 'GET'], detail=False, url_path='client-url', permission_classes=[IsValidUser])
def get_client_protocol_url(self, request, *args, **kwargs):
serializer = self.get_valid_serializer()
protocol_data = self.get_client_protocol_data(serializer)
protocol_data = base64.b64encode(json.dumps(protocol_data).encode()).decode()
data = {
'url': 'jms://{}'.format(protocol_data),
}
return Response(data=data)
class SecretDetailMixin:
valid_token: Callable
request: Request
get_serializer: Callable
@staticmethod
def _get_application_secret_detail(application):
from perms.models import Action
gateway = None
if not application.category_remote_app:
actions = Action.NONE
remote_app = {}
asset = None
domain = application.domain
else:
remote_app = application.get_rdp_remote_app_setting()
actions = Action.CONNECT
asset = application.get_remote_app_asset()
domain = asset.domain
if domain and domain.has_gateway():
gateway = domain.random_gateway()
return {
'asset': asset,
'application': application,
'gateway': gateway,
'remote_app': remote_app,
'actions': actions
}
@staticmethod
def _get_asset_secret_detail(asset, user, system_user):
from perms.utils.asset import get_asset_system_user_ids_with_actions_by_user
systemuserid_actions_mapper = get_asset_system_user_ids_with_actions_by_user(user, asset)
actions = systemuserid_actions_mapper.get(system_user.id, [])
gateway = None
if asset and asset.domain and asset.domain.has_gateway():
gateway = asset.domain.random_gateway()
return {
'asset': asset,
'application': None,
'gateway': gateway,
'remote_app': None,
'actions': actions,
}
@action(methods=['POST'], detail=False, permission_classes=[IsSuperUserOrAppUser], url_path='secret-info/detail')
def get_secret_detail(self, request, *args, **kwargs):
token = request.data.get('token', '')
try:
value, user, system_user, asset, app, expired_at = self.valid_token(token)
except serializers.ValidationError as e:
post_auth_failed.send(
sender=self.__class__, username='', request=self.request,
reason=_('Invalid token')
)
raise e
data = dict(user=user, system_user=system_user, expired_at=expired_at)
if asset:
asset_detail = self._get_asset_secret_detail(asset, user=user, system_user=system_user)
system_user.load_asset_more_auth(asset.id, user.username, user.id)
data['type'] = 'asset'
data.update(asset_detail)
else:
app_detail = self._get_application_secret_detail(app)
system_user.load_app_more_auth(app.id, user.id)
data['type'] = 'application'
data.update(app_detail)
self.request.session['auth_backend'] = settings.AUTH_BACKEND_AUTH_TOKEN
post_auth_success.send(sender=self.__class__, user=user, request=self.request, login_type='T')
serializer = self.get_serializer(data)
return Response(data=serializer.data, status=200)
class UserConnectionTokenViewSet(
RootOrgViewMixin, SerializerMixin, ClientProtocolMixin,
SecretDetailMixin, GenericViewSet
):
permission_classes = (IsSuperUserOrAppUser,)
serializer_classes = {
'default': ConnectionTokenSerializer,
'get_secret_detail': ConnectionTokenSecretSerializer,
}
CACHE_KEY_PREFIX = 'CONNECTION_TOKEN_{}'
@staticmethod
def check_resource_permission(user, asset, application, system_user):
from perms.utils.asset import has_asset_system_permission
from perms.utils.application import has_application_system_permission
if asset and not has_asset_system_permission(user, asset, system_user):
error = f'User not has this asset and system user permission: ' \
f'user={user.id} system_user={system_user.id} asset={asset.id}'
raise PermissionDenied(error)
if application and not has_application_system_permission(user, application, system_user):
error = f'User not has this application and system user permission: ' \
f'user={user.id} system_user={system_user.id} application={application.id}'
raise PermissionDenied(error)
return True
def create_token(self, user, asset, application, system_user, ttl=5 * 60):
if not self.request.user.is_superuser and user != self.request.user:
raise PermissionDenied('Only super user can create user token')
self.check_resource_permission(user, asset, application, system_user)
token = random_string(36)
value = {
'user': str(user.id),
'username': user.username,
'system_user': str(system_user.id),
'system_user_name': system_user.name
}
if asset:
value.update({
'type': 'asset',
'asset': str(asset.id),
'hostname': asset.hostname,
})
elif application:
value.update({
'type': 'application',
'application': application.id,
'application_name': str(application)
})
key = self.CACHE_KEY_PREFIX.format(token)
cache.set(key, value, timeout=ttl)
return token
def create(self, request, *args, **kwargs):
serializer = self.get_serializer(data=request.data)
serializer.is_valid(raise_exception=True)
asset, application, system_user, user = self.get_request_resource(serializer)
token = self.create_token(user, asset, application, system_user)
return Response({"token": token}, status=201)
def valid_token(self, token):
from users.models import User
from assets.models import SystemUser, Asset
from applications.models import Application
from perms.utils.asset.permission import validate_permission as asset_validate_permission
from perms.utils.application.permission import validate_permission as app_validate_permission
key = self.CACHE_KEY_PREFIX.format(token)
value = cache.get(key, None)
if not value:
raise serializers.ValidationError('Token not found')
user = get_object_or_404(User, id=value.get('user'))
if not user.is_valid:
raise serializers.ValidationError("User not valid, disabled or expired")
system_user = get_object_or_404(SystemUser, id=value.get('system_user'))
asset = None
app = None
if value.get('type') == 'asset':
asset = get_object_or_404(Asset, id=value.get('asset'))
if not asset.is_active:
raise serializers.ValidationError("Asset disabled")
has_perm, expired_at = asset_validate_permission(user, asset, system_user, 'connect')
else:
app = get_object_or_404(Application, id=value.get('application'))
has_perm, expired_at = app_validate_permission(user, app, system_user)
if not has_perm:
raise serializers.ValidationError('Permission expired or invalid')
return value, user, system_user, asset, app, expired_at
def get_permissions(self):
if self.action in ["create", "get_rdp_file"]:
if self.request.data.get('user', None):
self.permission_classes = (IsSuperUser,)
else:
self.permission_classes = (IsValidUser,)
return super().get_permissions()
def get(self, request):
token = request.query_params.get('token')
key = self.CACHE_KEY_PREFIX.format(token)
value = cache.get(key, None)
if not value:
return Response('', status=404)
return Response(value)