ahserver_g/ahserver/auth_api.py
2023-04-06 16:20:19 +08:00

114 lines
3.4 KiB
Python

from aiohttp_auth import auth
from os import urandom
from aiohttp import web
import aiohttp_session
import base64
from aiohttp_session import get_session, session_middleware
from aiohttp_session.cookie_storage import EncryptedCookieStorage
from appPublic.jsonConfig import getConfig
from appPublic.rsawrap import RSA
from appPublic.app_logger import AppLogger
class AuthAPI(AppLogger):
def __init__(self):
super().__init__()
def getPrivateKey(self):
if not hasattr(self,'rsaEngine'):
self.rsaEngine = RSA()
self.conf = getConfig()
fname = self.conf.website.rsakey.privatekey
self.privatekey = self.rsaEngine.read_privatekey(fname)
return self.privatekey
def rsaDecode(self,cdata):
self.getPrivateKey()
return self.rsaEngine.decode(self.privatekey,cdata)
def setupAuth(self,app):
# setup session middleware in aiohttp fashion
storage = EncryptedCookieStorage(urandom(32))
aiohttp_session.setup(app, storage)
# Create an auth ticket mechanism that expires after 1 minute (60
# seconds), and has a randomly generated secret. Also includes the
# optional inclusion of the users IP address in the hash
policy = auth.SessionTktAuthentication(urandom(32), 60,
include_ip=True)
# setup aiohttp_auth.auth middleware in aiohttp fashion
# print('policy = ', policy)
auth.setup(app, policy)
app.middlewares.append(self.checkAuth)
app.router.add_route('GET', '/logout', self.logout)
async def checkLogin(self,request):
"""
authorization header has the format:
login_method:user_id:auth_code
"""
authinfo = request.headers.get('authorization')
if authinfo is None:
self.debug('header not include "authorization" info %s' % request.headers)
raise web.HTTPUnauthorized()
if isinstance(authinfo, str):
authinfo = authinfo.encode('ascii')
authinfo = base64.b64decode(authinfo)
authinfo = authinfo.decode('ascii')
authdata = self.rsaDecode(authinfo)
# print('authdata=',authdata)
alist = authdata.split('::')
if len(alist) != 3:
self.debug('auth data format error %s' % authdata)
raise web.HTTPUnauthorized()
login_method=alist[0]
user_id = alist[1]
password = alist[2]
if login_method == 'password':
if await self.checkUserPassword(user_id,password):
await auth.remember(request,user_id)
# print('auth success,',user_id, password)
return user_id
# print('auth failed')
raise web.HTTPUnauthorized()
else:
# print('auth method unrecognized------------------------')
raise web.HTTPUnauthorized()
async def logout(self,request):
await auth.forget(request)
return web.Response(body='OK'.encode('utf-8'))
@web.middleware
async def checkAuth(self,request,handler):
path = request.path
# print(f'*****{path} checkAuth called********')
if not await self.needAuth(path):
return await handler(request)
user = await auth.get_auth(request)
if user is None:
# print('-----------auth.get_auth() return None--------------')
user = await self.checkLogin(request)
#raise web.HTTPFound(f'/login_form?from_path={path}')
is_ok = await self.checkUserPermission(user, path)
if is_ok:
return await handler(request)
# print(f'**{path} forbidden**')
raise web.HTTPForbidden()
async def needAuth(self,path):
return False
async def getPermissionNeed(self,path):
return 'admin'
async def checkUserPassword(self,user_id,password):
return True
async def getUserPermissions(self,user):
return ['admin','view']