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gns3-server/gns3server/services/authentication.py

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#
# Copyright (C) 2020 GNS3 Technologies Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from jose import JWTError, jwt
from datetime import datetime, timedelta
from passlib.context import CryptContext
from typing import Optional
from fastapi import HTTPException, status
from gns3server.schemas.controller.tokens import TokenData
from gns3server.config import Config
from pydantic import ValidationError
import logging
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log = logging.getLogger(__name__)
pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
DEFAULT_JWT_SECRET_KEY = "efd08eccec3bd0a1be2e086670e5efa90969c68d07e072d7354a76cea5e33d4e"
class AuthService:
def hash_password(self, password: str) -> str:
return pwd_context.hash(password)
def verify_password(self, password, hashed_password) -> bool:
return pwd_context.verify(password, hashed_password)
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def create_access_token(self, username, secret_key: str = None, expires_in: int = 0) -> str:
if not expires_in:
expires_in = Config.instance().settings.Controller.jwt_access_token_expire_minutes
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expire = datetime.utcnow() + timedelta(minutes=expires_in)
to_encode = {"sub": username, "exp": expire}
if secret_key is None:
secret_key = Config.instance().settings.Controller.jwt_secret_key
if secret_key is None:
secret_key = DEFAULT_JWT_SECRET_KEY
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log.error("A JWT secret key must be configured to secure the server, using an unsecured default key!")
algorithm = Config.instance().settings.Controller.jwt_algorithm
encoded_jwt = jwt.encode(to_encode, secret_key, algorithm=algorithm)
return encoded_jwt
def get_username_from_token(self, token: str, secret_key: str = None) -> Optional[str]:
credentials_exception = HTTPException(
status_code=status.HTTP_401_UNAUTHORIZED,
detail="Could not validate credentials",
headers={"WWW-Authenticate": "Bearer"},
)
try:
if secret_key is None:
secret_key = Config.instance().settings.Controller.jwt_secret_key
if secret_key is None:
secret_key = DEFAULT_JWT_SECRET_KEY
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log.error("A JWT secret key must be configured to secure the server, using an unsecured default key!")
algorithm = Config.instance().settings.Controller.jwt_algorithm
payload = jwt.decode(token, secret_key, algorithms=[algorithm])
username: str = payload.get("sub")
if username is None:
raise credentials_exception
token_data = TokenData(username=username)
except (JWTError, ValidationError):
raise credentials_exception
return token_data.username