Felipe Cardoso
af53b52c0c
Adjusted `datetime.utcnow` to `datetime.now` for consistency and refactored token creation functions for cleaner structure. Removed duplicated `create_access_token` and `create_refresh_token` definitions by consolidating them into a single location.
140 lines
4.6 KiB
Python
140 lines
4.6 KiB
Python
from datetime import datetime, timedelta
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from typing import Optional, Tuple
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from uuid import uuid4
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from black import timezone
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from jose import jwt, ExpiredSignatureError, JWTError
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from passlib.context import CryptContext
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from app.core.config import settings
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from app.schemas.token import TokenPayload, TokenResponse
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from jose.exceptions import ExpiredSignatureError, JWTError, JOSEError
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# Configuration
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SECRET_KEY = settings.SECRET_KEY
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ALGORITHM = "HS256"
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ACCESS_TOKEN_EXPIRE_MINUTES = 30
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REFRESH_TOKEN_EXPIRE_DAYS = 7
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# Password hashing context
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pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
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def verify_password(plain_password: str, hashed_password: str) -> bool:
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"""Verify a plain password against its hash."""
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return pwd_context.verify(plain_password, hashed_password)
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def get_password_hash(password: str) -> str:
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"""Generate password hash."""
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return pwd_context.hash(password)
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def create_tokens(user_id: str) -> TokenResponse:
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"""
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Create both access and refresh tokens for a user.
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Args:
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user_id: The user's ID
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Returns:
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TokenResponse containing both tokens and metadata
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"""
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access_token = create_access_token({"sub": user_id})
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refresh_token = create_refresh_token({"sub": user_id})
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return TokenResponse(
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access_token=access_token,
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refresh_token=refresh_token,
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token_type="bearer",
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expires_in=ACCESS_TOKEN_EXPIRE_MINUTES * 60,
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user_id=user_id
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)
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def create_token(
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data: dict,
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expires_delta: Optional[timedelta] = None,
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token_type: str = "access"
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) -> str:
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"""Create a JWT token with the specified type and expiration."""
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to_encode = data.copy()
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if expires_delta:
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expire = datetime.now() + expires_delta
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else:
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expire = datetime.now() + (
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timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES) if token_type == "access"
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else timedelta(days=REFRESH_TOKEN_EXPIRE_DAYS)
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)
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to_encode.update({
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"exp": expire,
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"type": token_type,
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"iat": datetime.now(),
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"jti": str(uuid4())
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})
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return jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
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def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -> str:
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"""Create a new access token."""
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return create_token(data, expires_delta, "access")
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def create_refresh_token(data: dict, expires_delta: Optional[timedelta] = None) -> str:
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"""Create a new refresh token."""
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return create_token(data, expires_delta, "refresh")
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def decode_token(token: str, required_type: str = "access") -> TokenPayload:
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"""
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Decode and validate a JWT token with explicit edge-case handling.
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Args:
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token: The JWT token to decode.
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required_type: The expected token type (default: "access").
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Returns:
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TokenPayload containing the decoded data.
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Raises:
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JWTError: If the token is expired, invalid, or malformed.
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"""
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try:
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payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
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# Explicitly validate required claims (`exp`, `sub`, `type`)
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if "exp" not in payload or "sub" not in payload or "type" not in payload:
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raise KeyError("Missing required claim.")
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# Verify token expiration (`exp`)
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if datetime.now() > datetime.fromtimestamp(payload["exp"]):
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raise ExpiredSignatureError("Token has expired.")
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# Verify token type (`type`)
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if payload["type"] != required_type:
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expected_type = required_type
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actual_type = payload["type"]
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raise JWTError(f"Invalid token type: expected '{expected_type}', got '{actual_type}'.")
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# Create TokenPayload object from token claims
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return TokenPayload(
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sub=payload["sub"],
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type=payload["type"],
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exp=datetime.fromtimestamp(payload["exp"]),
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iat=datetime.fromtimestamp(payload.get("iat", 0)),
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jti=payload.get("jti")
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)
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except ExpiredSignatureError as e: # Expired token
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raise JWTError("Token expired. Please refresh your token to continue.") from e
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except JWTError as e:
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# Handle signature verification and malformed token errors
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if str(e) in ["Signature verification failed.", "Not enough segments"]:
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raise JWTError("Invalid token.") from e
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# Propagate other JWTError messages
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raise JWTError(str(e)) from e
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except KeyError as e: # Missing required claims
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raise JWTError("Malformed token. Missing required claim.") from e
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except JOSEError as e: # All other JOSE-related errors
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raise JWTError("Invalid token.") from e
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