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243 lines
8.3 KiB
243 lines
8.3 KiB
# -*- coding: utf-8 -*-
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#
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import os
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import uuid
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from hashlib import md5
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import sshpubkeys
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from django.core.cache import cache
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from django.db import models
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from django.utils.translation import ugettext_lazy as _
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from django.conf import settings
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from common.utils import (
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get_signer, ssh_key_string_to_obj, ssh_key_gen, get_logger
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)
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from common.validators import alphanumeric
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from common import fields
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from orgs.mixins import OrgModelMixin
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from .utils import private_key_validator, Connectivity
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signer = get_signer()
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logger = get_logger(__file__)
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class AssetUser(OrgModelMixin):
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id = models.UUIDField(default=uuid.uuid4, primary_key=True)
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name = models.CharField(max_length=128, verbose_name=_('Name'))
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username = models.CharField(max_length=32, blank=True, verbose_name=_('Username'), validators=[alphanumeric])
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password = fields.EncryptCharField(max_length=256, blank=True, null=True, verbose_name=_('Password'))
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private_key = fields.EncryptTextField(blank=True, null=True, verbose_name=_('SSH private key'), validators=[private_key_validator, ])
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public_key = fields.EncryptTextField(blank=True, null=True, verbose_name=_('SSH public key'))
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comment = models.TextField(blank=True, verbose_name=_('Comment'))
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date_created = models.DateTimeField(auto_now_add=True, verbose_name=_("Date created"))
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date_updated = models.DateTimeField(auto_now=True, verbose_name=_("Date updated"))
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created_by = models.CharField(max_length=128, null=True, verbose_name=_('Created by'))
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CONNECTIVITY_ASSET_CACHE_KEY = "ASSET_USER_{}_ASSET_CONNECTIVITY"
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CONNECTIVITY_AMOUNT_CACHE_KEY = "ASSET_USER_{}_CONNECTIVITY_AMOUNT"
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ASSETS_AMOUNT_CACHE_KEY = "ASSET_USER_{}_ASSETS_AMOUNT"
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ASSET_USER_CACHE_TIME = 3600 * 24
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_prefer = "system_user"
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@property
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def private_key_obj(self):
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if self.private_key:
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return ssh_key_string_to_obj(self.private_key, password=self.password)
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else:
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return None
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@property
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def private_key_file(self):
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if not self.private_key_obj:
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return None
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project_dir = settings.PROJECT_DIR
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tmp_dir = os.path.join(project_dir, 'tmp')
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key_name = '.' + md5(self.private_key.encode('utf-8')).hexdigest()
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key_path = os.path.join(tmp_dir, key_name)
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if not os.path.exists(key_path):
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self.private_key_obj.write_private_key_file(key_path)
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os.chmod(key_path, 0o400)
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return key_path
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@property
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def public_key_obj(self):
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if self.public_key:
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try:
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return sshpubkeys.SSHKey(self.public_key)
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except TabError:
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pass
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return None
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@property
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def part_id(self):
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i = '-'.join(str(self.id).split('-')[:3])
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return i
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def get_related_assets(self):
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assets = self.assets.all()
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return assets
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def set_auth(self, password=None, private_key=None, public_key=None):
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update_fields = []
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if password:
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self.password = password
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update_fields.append('password')
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if private_key:
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self.private_key = private_key
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update_fields.append('private_key')
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if public_key:
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self.public_key = public_key
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update_fields.append('public_key')
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if update_fields:
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self.save(update_fields=update_fields)
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def set_connectivity(self, summary):
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unreachable = summary.get('dark', {}).keys()
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reachable = summary.get('contacted', {}).keys()
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for asset in self.get_related_assets():
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if asset.hostname in unreachable:
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self.set_asset_connectivity(asset, Connectivity.unreachable())
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elif asset.hostname in reachable:
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self.set_asset_connectivity(asset, Connectivity.reachable())
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else:
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self.set_asset_connectivity(asset, Connectivity.unknown())
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cache_key = self.CONNECTIVITY_AMOUNT_CACHE_KEY.format(self.part_id)
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cache.delete(cache_key)
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@property
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def connectivity(self):
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assets = self.get_related_assets()\
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.select_related('admin_user')\
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.only('id', 'hostname', 'admin_user')
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data = {
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'unreachable': [],
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'reachable': [],
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'unknown': [],
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}
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for asset in assets:
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connectivity = self.get_asset_connectivity(asset)
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if connectivity.is_reachable():
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data["reachable"].append(asset.hostname)
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elif connectivity.is_unreachable():
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data["unreachable"].append(asset.hostname)
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else:
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data["unknown"].append(asset.hostname)
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return data
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@property
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def connectivity_amount(self):
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cache_key = self.CONNECTIVITY_AMOUNT_CACHE_KEY.format(self.part_id)
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amount = cache.get(cache_key)
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if not amount:
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connectivity = {k: len(v) for k, v in self.connectivity.items()}
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cache.set(cache_key, connectivity, self.ASSET_USER_CACHE_TIME)
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return amount
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@property
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def assets_amount(self):
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cache_key = self.ASSETS_AMOUNT_CACHE_KEY.format(self.id)
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cached = cache.get(cache_key)
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if not cached:
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cached = self.get_related_assets().count()
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cache.set(cache_key, cached, self.ASSET_USER_CACHE_TIME)
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return cached
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def expire_assets_amount(self):
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cache_key = self.ASSETS_AMOUNT_CACHE_KEY.format(self.id)
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cache.delete(cache_key)
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def get_asset_connectivity(self, asset):
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i = self.generate_id_with_asset(asset)
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key = self.CONNECTIVITY_ASSET_CACHE_KEY.format(i)
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return Connectivity.get(key)
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def set_asset_connectivity(self, asset, c):
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i = self.generate_id_with_asset(asset)
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key = self.CONNECTIVITY_ASSET_CACHE_KEY.format(i)
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Connectivity.set(key, c)
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# 当为某个系统用户或管理用户设置的的时候，失效掉他们的连接数量
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amount_key = self.CONNECTIVITY_AMOUNT_CACHE_KEY.format(self.part_id)
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cache.delete(amount_key)
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def get_asset_user(self, asset):
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from ..backends import AssetUserManager
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try:
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manager = AssetUserManager().prefer(self._prefer)
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other = manager.get(username=self.username, asset=asset, prefer_id=self.id)
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return other
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except Exception as e:
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logger.error(e, exc_info=True)
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return None
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def load_specific_asset_auth(self, asset):
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instance = self.get_asset_user(asset)
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if instance:
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self._merge_auth(instance)
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def _merge_auth(self, other):
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if other.password:
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self.password = other.password
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if other.public_key:
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self.public_key = other.public_key
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if other.private_key:
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self.private_key = other.private_key
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def clear_auth(self):
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self.password = ''
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self.private_key = ''
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self.public_key = ''
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self.save()
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def auto_gen_auth(self):
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password = str(uuid.uuid4())
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private_key, public_key = ssh_key_gen(
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username=self.username
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)
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self.set_auth(
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password=password, private_key=private_key,
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public_key=public_key
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)
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def auto_gen_auth_password(self):
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password = str(uuid.uuid4())
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self.set_auth(password=password)
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def _to_secret_json(self):
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"""Push system user use it"""
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return {
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'name': self.name,
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'username': self.username,
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'password': self.password,
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'public_key': self.public_key,
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'private_key': self.private_key_file,
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}
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def generate_id_with_asset(self, asset):
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user_id = [self.part_id]
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asset_id = str(asset.id).split('-')[3:]
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ids = user_id + asset_id
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return '-'.join(ids)
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def construct_to_authbook(self, asset):
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from . import AuthBook
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fields = [
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'name', 'username', 'comment', 'org_id',
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'password', 'private_key', 'public_key',
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'date_created', 'date_updated', 'created_by'
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]
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i = self.generate_id_with_asset(asset)
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obj = AuthBook(id=i, asset=asset, version=0, is_latest=True)
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for field in fields:
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value = getattr(self, field)
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setattr(obj, field, value)
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return obj
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class Meta:
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abstract = True
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