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