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from importlib import import_module
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from django.conf import settings
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from django.contrib.auth import user_logged_in
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from django.core.cache import cache
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from django.dispatch import receiver
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from django_cas_ng.signals import cas_user_authenticated
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from authentication.backends.oidc.signals import (
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openid_user_login_failed, openid_user_login_success
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)
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from authentication.backends.saml2.signals import (
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saml2_user_authenticated, saml2_user_authentication_failed
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)
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from .signals import post_auth_success, post_auth_failed
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@receiver(user_logged_in)
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def on_user_auth_login_success(sender, user, request, **kwargs):
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# 失效 perms 缓存
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user.expire_rbac_perms_cache()
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# 开启了 MFA，且没有校验过, 可以全局校验, middleware 中可以全局管理 oidc 等第三方认证的 MFA
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if settings.SECURITY_MFA_AUTH_ENABLED_FOR_THIRD_PARTY \
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and user.mfa_enabled \
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and not request.session.get('auth_mfa'):
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request.session['auth_mfa_required'] = 1
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# 单点登录，超过了自动退出
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if settings.USER_LOGIN_SINGLE_MACHINE_ENABLED:
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lock_key = 'single_machine_login_' + str(user.id)
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session_key = cache.get(lock_key)
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if session_key and session_key != request.session.session_key:
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session = import_module(settings.SESSION_ENGINE).SessionStore(session_key)
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session.delete()
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cache.set(lock_key, request.session.session_key, None)
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# 标记登录，设置 cookie，前端可以控制刷新, Middleware 会拦截这个生成 cookie
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request.session['auth_session_expiration_required'] = 1
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@receiver(openid_user_login_success)
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def on_oidc_user_login_success(sender, request, user, create=False, **kwargs):
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request.session['auth_backend'] = settings.AUTH_BACKEND_OIDC_CODE
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post_auth_success.send(sender, user=user, request=request)
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@receiver(openid_user_login_failed)
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def on_oidc_user_login_failed(sender, username, request, reason, **kwargs):
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request.session['auth_backend'] = settings.AUTH_BACKEND_OIDC_CODE
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post_auth_failed.send(sender, username=username, request=request, reason=reason)
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@receiver(cas_user_authenticated)
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def on_cas_user_login_success(sender, request, user, **kwargs):
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request.session['auth_backend'] = settings.AUTH_BACKEND_CAS
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post_auth_success.send(sender, user=user, request=request)
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@receiver(saml2_user_authenticated)
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def on_saml2_user_login_success(sender, request, user, **kwargs):
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request.session['auth_backend'] = settings.AUTH_BACKEND_SAML2
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post_auth_success.send(sender, user=user, request=request)
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@receiver(saml2_user_authentication_failed)
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def on_saml2_user_login_failed(sender, request, username, reason, **kwargs):
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request.session['auth_backend'] = settings.AUTH_BACKEND_SAML2
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post_auth_failed.send(sender, username=username, request=request, reason=reason)
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