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# -*- coding: utf-8 -*-
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#
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import inspect
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from urllib.parse import urlencode
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from functools import partial
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import time
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from django.core.cache import cache
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from django.conf import settings
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from django.contrib import auth
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from django.utils.translation import ugettext as _
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from django.contrib.auth import (
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BACKEND_SESSION_KEY, _get_backends,
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PermissionDenied, user_login_failed, _clean_credentials
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)
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from django.shortcuts import reverse, redirect
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from django.views.generic.edit import FormView
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from common.utils import get_object_or_none, get_request_ip, get_logger, bulk_get, FlashMessageUtil
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from users.models import User, MFAType
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from users.utils import LoginBlockUtil, MFABlockUtils
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from . import errors
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from .utils import rsa_decrypt, gen_key_pair
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from .signals import post_auth_success, post_auth_failed
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from .const import RSA_PRIVATE_KEY, RSA_PUBLIC_KEY
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logger = get_logger(__name__)
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def check_backend_can_auth(username, backend_path, allowed_auth_backends):
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if allowed_auth_backends is not None and backend_path not in allowed_auth_backends:
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logger.debug('Skip user auth backend: {}, {} not in'.format(
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username, backend_path, ','.join(allowed_auth_backends)
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)
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)
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return False
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return True
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def authenticate(request=None, **credentials):
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"""
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If the given credentials are valid, return a User object.
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"""
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username = credentials.get('username')
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allowed_auth_backends = User.get_user_allowed_auth_backends(username)
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for backend, backend_path in _get_backends(return_tuples=True):
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# 预先检查，不浪费认证时间
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if not check_backend_can_auth(username, backend_path, allowed_auth_backends):
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continue
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backend_signature = inspect.signature(backend.authenticate)
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try:
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backend_signature.bind(request, **credentials)
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except TypeError:
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# This backend doesn't accept these credentials as arguments. Try the next one.
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continue
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try:
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user = backend.authenticate(request, **credentials)
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except PermissionDenied:
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# This backend says to stop in our tracks - this user should not be allowed in at all.
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break
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if user is None:
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continue
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# 如果是 None, 证明没有检查过, 需要再次检查
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if allowed_auth_backends is None:
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# 有些 authentication 参数中不带 username, 之后还要再检查
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allowed_auth_backends = user.get_allowed_auth_backends()
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if not check_backend_can_auth(user.username, backend_path, allowed_auth_backends):
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continue
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# Annotate the user object with the path of the backend.
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user.backend = backend_path
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return user
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# The credentials supplied are invalid to all backends, fire signal
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user_login_failed.send(sender=__name__, credentials=_clean_credentials(credentials), request=request)
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auth.authenticate = authenticate
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class PasswordEncryptionViewMixin:
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request = None
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def get_decrypted_password(self, password=None, username=None):
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request = self.request
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if hasattr(request, 'data'):
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data = request.data
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else:
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data = request.POST
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username = username or data.get('username')
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password = password or data.get('password')
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password = self.decrypt_passwd(password)
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if not password:
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self.raise_password_decrypt_failed(username=username)
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return password
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def raise_password_decrypt_failed(self, username):
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ip = self.get_request_ip()
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raise errors.CredentialError(
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error=errors.reason_password_decrypt_failed,
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username=username, ip=ip, request=self.request
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)
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def decrypt_passwd(self, raw_passwd):
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# 获取解密密钥，对密码进行解密
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rsa_private_key = self.request.session.get(RSA_PRIVATE_KEY)
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if rsa_private_key is not None:
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try:
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return rsa_decrypt(raw_passwd, rsa_private_key)
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except Exception as e:
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logger.error(e, exc_info=True)
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logger.error(
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f'Decrypt password failed: password[{raw_passwd}] '
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f'rsa_private_key[{rsa_private_key}]'
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)
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return None
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return raw_passwd
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def get_request_ip(self):
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ip = ''
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if hasattr(self.request, 'data'):
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ip = self.request.data.get('remote_addr', '')
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ip = ip or get_request_ip(self.request)
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return ip
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def get_context_data(self, **kwargs):
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# 生成加解密密钥对，public_key传递给前端，private_key存入session中供解密使用
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rsa_public_key = self.request.session.get(RSA_PUBLIC_KEY)
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rsa_private_key = self.request.session.get(RSA_PRIVATE_KEY)
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if not all((rsa_private_key, rsa_public_key)):
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rsa_private_key, rsa_public_key = gen_key_pair()
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rsa_public_key = rsa_public_key.replace('\n', '\\n')
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self.request.session[RSA_PRIVATE_KEY] = rsa_private_key
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self.request.session[RSA_PUBLIC_KEY] = rsa_public_key
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kwargs.update({
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'rsa_public_key': rsa_public_key,
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})
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return super().get_context_data(**kwargs)
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class AuthMixin(PasswordEncryptionViewMixin):
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request = None
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partial_credential_error = None
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key_prefix_captcha = "_LOGIN_INVALID_{}"
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def get_user_from_session(self):
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if self.request.session.is_empty():
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raise errors.SessionEmptyError()
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if all((self.request.user,
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not self.request.user.is_anonymous,
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BACKEND_SESSION_KEY in self.request.session)):
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user = self.request.user
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user.backend = self.request.session[BACKEND_SESSION_KEY]
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return user
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user_id = self.request.session.get('user_id')
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if not user_id:
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user = None
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else:
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user = get_object_or_none(User, pk=user_id)
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if not user:
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raise errors.SessionEmptyError()
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user.backend = self.request.session.get("auth_backend")
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return user
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def _check_is_block(self, username, raise_exception=True):
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ip = self.get_request_ip()
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if LoginBlockUtil(username, ip).is_block():
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logger.warn('Ip was blocked' + ': ' + username + ':' + ip)
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exception = errors.BlockLoginError(username=username, ip=ip)
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if raise_exception:
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raise errors.BlockLoginError(username=username, ip=ip)
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else:
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return exception
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def check_is_block(self, raise_exception=True):
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if hasattr(self.request, 'data'):
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username = self.request.data.get("username")
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else:
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username = self.request.POST.get("username")
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self._check_is_block(username, raise_exception)
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def raise_credential_error(self, error):
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raise self.partial_credential_error(error=error)
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def _set_partial_credential_error(self, username, ip, request):
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self.partial_credential_error = partial(errors.CredentialError, username=username, ip=ip, request=request)
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def get_auth_data(self, decrypt_passwd=False):
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request = self.request
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if hasattr(request, 'data'):
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data = request.data
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else:
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data = request.POST
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items = ['username', 'password', 'challenge', 'public_key', 'auto_login']
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username, password, challenge, public_key, auto_login = bulk_get(data, *items, default='')
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ip = self.get_request_ip()
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self._set_partial_credential_error(username=username, ip=ip, request=request)
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password = password + challenge.strip()
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if decrypt_passwd:
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password = self.get_decrypted_password()
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return username, password, public_key, ip, auto_login
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def _check_only_allow_exists_user_auth(self, username):
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# 仅允许预先存在的用户认证
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if settings.ONLY_ALLOW_EXIST_USER_AUTH:
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exist = User.objects.filter(username=username).exists()
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if not exist:
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logger.error(f"Only allow exist user auth, login failed: {username}")
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self.raise_credential_error(errors.reason_user_not_exist)
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def _check_auth_user_is_valid(self, username, password, public_key):
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user = authenticate(self.request, username=username, password=password, public_key=public_key)
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if not user:
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self.raise_credential_error(errors.reason_password_failed)
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elif user.is_expired:
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self.raise_credential_error(errors.reason_user_expired)
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elif not user.is_active:
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self.raise_credential_error(errors.reason_user_inactive)
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return user
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def _check_login_acl(self, user, ip):
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# ACL 限制用户登录
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from acls.models import LoginACL
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is_allowed = LoginACL.allow_user_to_login(user, ip)
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if not is_allowed:
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raise errors.LoginIPNotAllowed(username=user.username, request=self.request)
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def set_login_failed_mark(self):
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ip = self.get_request_ip()
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cache.set(self.key_prefix_captcha.format(ip), 1, 3600)
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def set_passwd_verify_on_session(self, user: User):
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self.request.session['user_id'] = str(user.id)
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self.request.session['auth_password'] = 1
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self.request.session['auth_password_expired_at'] = time.time() + settings.AUTH_EXPIRED_SECONDS
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def check_is_need_captcha(self):
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# 最近有登录失败时需要填写验证码
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ip = get_request_ip(self.request)
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need = cache.get(self.key_prefix_captcha.format(ip))
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return need
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def check_user_auth(self, decrypt_passwd=False):
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self.check_is_block()
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request = self.request
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username, password, public_key, ip, auto_login = self.get_auth_data(decrypt_passwd=decrypt_passwd)
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self._check_only_allow_exists_user_auth(username)
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user = self._check_auth_user_is_valid(username, password, public_key)
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# 校验login-acl规则
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self._check_login_acl(user, ip)
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self._check_password_require_reset_or_not(user)
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self._check_passwd_is_too_simple(user, password)
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self._check_passwd_need_update(user)
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LoginBlockUtil(username, ip).clean_failed_count()
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request.session['auth_password'] = 1
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request.session['user_id'] = str(user.id)
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request.session['auto_login'] = auto_login
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request.session['auth_backend'] = getattr(user, 'backend', settings.AUTH_BACKEND_MODEL)
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return user
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def _check_is_local_user(self, user: User):
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if user.source != User.Source.local:
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raise self.raise_credential_error(error=errors.only_local_users_are_allowed)
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def check_oauth2_auth(self, user: User, auth_backend):
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ip = self.get_request_ip()
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request = self.request
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self._set_partial_credential_error(user.username, ip, request)
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if user.is_expired:
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self.raise_credential_error(errors.reason_user_expired)
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elif not user.is_active:
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self.raise_credential_error(errors.reason_user_inactive)
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self._check_is_block(user.username)
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self._check_login_acl(user, ip)
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LoginBlockUtil(user.username, ip).clean_failed_count()
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MFABlockUtils(user.username, ip).clean_failed_count()
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request.session['auth_password'] = 1
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request.session['user_id'] = str(user.id)
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request.session['auth_backend'] = auth_backend
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return user
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@classmethod
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def generate_reset_password_url_with_flash_msg(cls, user, message):
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reset_passwd_url = reverse('authentication:reset-password')
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query_str = urlencode({
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'token': user.generate_reset_token()
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})
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reset_passwd_url = f'{reset_passwd_url}?{query_str}'
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message_data = {
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'title': _('Please change your password'),
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'message': message,
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'interval': 3,
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'redirect_url': reset_passwd_url,
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}
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return FlashMessageUtil.gen_message_url(message_data)
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@classmethod
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def _check_passwd_is_too_simple(cls, user: User, password):
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if user.is_superuser and password == 'admin':
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message = _('Your password is too simple, please change it for security')
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url = cls.generate_reset_password_url_with_flash_msg(user, message=message)
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raise errors.PasswdTooSimple(url)
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@classmethod
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def _check_passwd_need_update(cls, user: User):
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if user.need_update_password:
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message = _('You should to change your password before login')
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url = cls.generate_reset_password_url_with_flash_msg(user, message)
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raise errors.PasswdNeedUpdate(url)
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@classmethod
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def _check_password_require_reset_or_not(cls, user: User):
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if user.password_has_expired:
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message = _('Your password has expired, please reset before logging in')
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url = cls.generate_reset_password_url_with_flash_msg(user, message)
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raise errors.PasswordRequireResetError(url)
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def check_user_auth_if_need(self, decrypt_passwd=False):
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request = self.request
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if request.session.get('auth_password') and \
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request.session.get('user_id'):
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user = self.get_user_from_session()
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if user:
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return user
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return self.check_user_auth(decrypt_passwd=decrypt_passwd)
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def check_user_mfa_if_need(self, user):
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if self.request.session.get('auth_mfa'):
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return
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if settings.OTP_IN_RADIUS:
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return
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if not user.mfa_enabled:
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return
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unset, url = user.mfa_enabled_but_not_set()
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if unset:
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raise errors.MFAUnsetError(user, self.request, url)
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raise errors.MFARequiredError(mfa_types=user.get_supported_mfa_types())
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def mark_mfa_ok(self, mfa_type=MFAType.OTP):
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self.request.session['auth_mfa'] = 1
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self.request.session['auth_mfa_time'] = time.time()
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self.request.session['auth_mfa_required'] = ''
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self.request.session['auth_mfa_type'] = mfa_type
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def clean_mfa_mark(self):
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self.request.session['auth_mfa'] = ''
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self.request.session['auth_mfa_time'] = ''
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self.request.session['auth_mfa_required'] = ''
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self.request.session['auth_mfa_type'] = ''
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def check_mfa_is_block(self, username, ip, raise_exception=True):
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if MFABlockUtils(username, ip).is_block():
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logger.warn('Ip was blocked' + ': ' + username + ':' + ip)
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exception = errors.BlockMFAError(username=username, request=self.request, ip=ip)
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if raise_exception:
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raise exception
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else:
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return exception
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def check_user_mfa(self, code, mfa_type=MFAType.OTP):
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user = self.get_user_from_session()
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ip = self.get_request_ip()
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self.check_mfa_is_block(user.username, ip)
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ok = user.check_mfa(code, mfa_type=mfa_type)
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if ok:
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self.mark_mfa_ok()
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return
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raise errors.MFAFailedError(
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username=user.username,
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request=self.request,
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ip=ip, mfa_type=mfa_type,
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)
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def get_ticket(self):
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from tickets.models import Ticket
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ticket_id = self.request.session.get("auth_ticket_id")
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logger.debug('Login confirm ticket id: {}'.format(ticket_id))
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if not ticket_id:
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ticket = None
|
|
|
else:
|
|
|
ticket = Ticket.all().filter(id=ticket_id).first()
|
|
|
return ticket
|
|
|
|
|
|
def get_ticket_or_create(self, confirm_setting):
|
|
|
ticket = self.get_ticket()
|
|
|
if not ticket or ticket.status_closed:
|
|
|
ticket = confirm_setting.create_confirm_ticket(self.request)
|
|
|
self.request.session['auth_ticket_id'] = str(ticket.id)
|
|
|
return ticket
|
|
|
|
|
|
def check_user_login_confirm(self):
|
|
|
ticket = self.get_ticket()
|
|
|
if not ticket:
|
|
|
raise errors.LoginConfirmOtherError('', "Not found")
|
|
|
if ticket.status_open:
|
|
|
raise errors.LoginConfirmWaitError(ticket.id)
|
|
|
elif ticket.state_approve:
|
|
|
self.request.session["auth_confirm"] = "1"
|
|
|
return
|
|
|
elif ticket.state_reject:
|
|
|
self.clean_mfa_mark()
|
|
|
raise errors.LoginConfirmOtherError(
|
|
|
ticket.id, ticket.get_state_display()
|
|
|
)
|
|
|
elif ticket.state_close:
|
|
|
self.clean_mfa_mark()
|
|
|
raise errors.LoginConfirmOtherError(
|
|
|
ticket.id, ticket.get_state_display()
|
|
|
)
|
|
|
else:
|
|
|
raise errors.LoginConfirmOtherError(
|
|
|
ticket.id, ticket.get_status_display()
|
|
|
)
|
|
|
|
|
|
def check_user_login_confirm_if_need(self, user):
|
|
|
if not settings.LOGIN_CONFIRM_ENABLE:
|
|
|
return
|
|
|
confirm_setting = user.get_login_confirm_setting()
|
|
|
if self.request.session.get('auth_confirm') or not confirm_setting:
|
|
|
return
|
|
|
self.get_ticket_or_create(confirm_setting)
|
|
|
self.check_user_login_confirm()
|
|
|
|
|
|
def clear_auth_mark(self):
|
|
|
self.request.session['auth_password'] = ''
|
|
|
self.request.session['auth_user_id'] = ''
|
|
|
self.request.session['auth_confirm'] = ''
|
|
|
self.request.session['auth_ticket_id'] = ''
|
|
|
|
|
|
def send_auth_signal(self, success=True, user=None, username='', reason=''):
|
|
|
if success:
|
|
|
post_auth_success.send(
|
|
|
sender=self.__class__, user=user, request=self.request
|
|
|
)
|
|
|
else:
|
|
|
post_auth_failed.send(
|
|
|
sender=self.__class__, username=username,
|
|
|
request=self.request, reason=reason
|
|
|
)
|
|
|
|
|
|
def redirect_to_guard_view(self):
|
|
|
guard_url = reverse('authentication:login-guard')
|
|
|
args = self.request.META.get('QUERY_STRING', '')
|
|
|
if args:
|
|
|
guard_url = "%s?%s" % (guard_url, args)
|
|
|
return redirect(guard_url)
|
