import base64 import json from datetime import timedelta from django.conf import settings from django.core.cache import cache from django.db import models from django.utils import timezone from django.utils.translation import ugettext_lazy as _ from rest_framework.exceptions import PermissionDenied from assets.const import Protocol from common.db.fields import EncryptCharField from common.utils import lazyproperty, pretty_string, bulk_get from common.utils.timezone import as_current_tz from orgs.mixins.models import JMSOrgBaseModel from terminal.models import Applet def date_expired_default(): return timezone.now() + timedelta(seconds=settings.CONNECTION_TOKEN_EXPIRATION) class ConnectionToken(JMSOrgBaseModel): value = models.CharField(max_length=64, default='', verbose_name=_("Value")) user = models.ForeignKey( 'users.User', on_delete=models.SET_NULL, null=True, blank=True, related_name='connection_tokens', verbose_name=_('User') ) asset = models.ForeignKey( 'assets.Asset', on_delete=models.SET_NULL, null=True, blank=True, related_name='connection_tokens', verbose_name=_('Asset'), ) account = models.CharField(max_length=128, verbose_name=_("Account name")) # 登录账号Name input_username = models.CharField(max_length=128, default='', blank=True, verbose_name=_("Input username")) input_secret = EncryptCharField(max_length=64, default='', blank=True, verbose_name=_("Input secret")) protocol = models.CharField(max_length=16, default=Protocol.ssh, verbose_name=_("Protocol")) connect_method = models.CharField(max_length=32, verbose_name=_("Connect method")) user_display = models.CharField(max_length=128, default='', verbose_name=_("User display")) asset_display = models.CharField(max_length=128, default='', verbose_name=_("Asset display")) date_expired = models.DateTimeField(default=date_expired_default, verbose_name=_("Date expired")) class Meta: ordering = ('-date_expired',) verbose_name = _('Connection token') permissions = [ ('view_connectiontokensecret', _('Can view connection token secret')) ] @property def is_expired(self): return self.date_expired < timezone.now() @property def expire_time(self): interval = self.date_expired - timezone.now() seconds = interval.total_seconds() if seconds < 0: seconds = 0 return int(seconds) def save(self, *args, **kwargs): self.asset_display = pretty_string(self.asset, max_length=128) self.user_display = pretty_string(self.user, max_length=128) return super().save(*args, **kwargs) def expire(self): self.date_expired = timezone.now() self.save() def renewal(self): """ 续期 Token，将来支持用户自定义创建 token 后，续期策略要修改 """ self.date_expired = date_expired_default() self.save() @lazyproperty def permed_account(self): from perms.utils import PermAccountUtil permed_account = PermAccountUtil().validate_permission( self.user, self.asset, self.account ) return permed_account @lazyproperty def actions(self): return self.permed_account.actions @lazyproperty def expire_at(self): return self.permed_account.date_expired.timestamp() def is_valid(self): if self.is_expired: error = _('Connection token expired at: {}').format(as_current_tz(self.date_expired)) raise PermissionDenied(error) if not self.user or not self.user.is_valid: error = _('No user or invalid user') raise PermissionDenied(error) if not self.asset or not self.asset.is_active: is_valid = False error = _('No asset or inactive asset') return is_valid, error if not self.account: error = _('No account') raise PermissionDenied(error) if timezone.now() - self.date_created < timedelta(seconds=60): return True, None if not self.permed_account or not self.permed_account.actions: msg = 'user `{}` not has asset `{}` permission for login `{}`'.format( self.user, self.asset, self.account ) raise PermissionDenied(msg) if self.permed_account.date_expired < timezone.now(): raise PermissionDenied('Expired') return True @lazyproperty def platform(self): return self.asset.platform @lazyproperty def connect_method_object(self): from common.utils import get_request_os from jumpserver.utils import get_current_request from terminal.connect_methods import ConnectMethodUtil request = get_current_request() os = get_request_os(request) if request else 'windows' method = ConnectMethodUtil.get_connect_method( self.connect_method, protocol=self.protocol, os=os ) return method def get_remote_app_option(self): cmdline = { 'app_name': self.connect_method, 'user_id': str(self.user.id), 'asset_id': str(self.asset.id), 'token_id': str(self.id) } cmdline_b64 = base64.b64encode(json.dumps(cmdline).encode()).decode() app = '||tinker' options = { 'remoteapplicationmode:i': '1', 'remoteapplicationprogram:s': app, 'remoteapplicationname:s': app, 'alternate shell:s': app, 'remoteapplicationcmdline:s': cmdline_b64, } return options def get_applet_option(self): method = self.connect_method_object if not method or method.get('type') != 'applet' or method.get('disabled', False): return None applet = Applet.objects.filter(name=method.get('value')).first() if not applet: return None host_account = applet.select_host_account() if not host_account: return None host, account, lock_key, ttl = bulk_get(host_account, ('host', 'account', 'lock_key', 'ttl')) gateway = host.gateway.select_gateway() if host.domain else None data = { 'id': account.id, 'applet': applet, 'host': host, 'gateway': gateway, 'account': account, 'remote_app_option': self.get_remote_app_option() } token_account_relate_key = f'token_account_relate_{account.id}' cache.set(token_account_relate_key, lock_key, ttl) return data @staticmethod def release_applet_account(account_id): token_account_relate_key = f'token_account_relate_{account_id}' lock_key = cache.get(token_account_relate_key) if lock_key: cache.delete(lock_key) cache.delete(token_account_relate_key) return 'released' return 'not found or expired' @lazyproperty def account_object(self): from assets.models import Account if not self.asset: return None account = self.asset.accounts.filter(name=self.account).first() if self.account == '@INPUT' or not account: data = { 'name': self.account, 'username': self.input_username, 'secret_type': 'password', 'secret': self.input_secret, 'su_from': None, 'org_id': self.asset.org_id } else: data = { 'name': account.name, 'username': account.username, 'secret_type': account.secret_type, 'secret': account.secret or self.input_secret, 'su_from': account.su_from, 'org_id': account.org_id } return Account(**data) @lazyproperty def domain(self): domain = self.asset.domain if self.asset else None return domain @lazyproperty def gateway(self): from assets.models import Domain if not self.domain: return self.domain: Domain return self.domain.select_gateway() @lazyproperty def command_filter_acls(self): from acls.models import CommandFilterACL kwargs = { 'user': self.user, 'asset': self.asset, 'account': self.account_object, } acls = CommandFilterACL.filter_queryset(**kwargs).valid() return acls class SuperConnectionToken(ConnectionToken): class Meta: proxy = True verbose_name = _("Super connection token")