nathanb
d024bf7fa3
- ui has been made 'kinda better' (after making it worse for a while lol - ESP rfid readers are now supported [ill upload the code for them in another repo later] - admin system has been secured a bit better and seems to be working well
69 lines
2.1 KiB
Python
69 lines
2.1 KiB
Python
import hashlib
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import hmac
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from datetime import datetime, timedelta
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from typing import Optional, Union, Any
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from jose import JWTError, jwt
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from passlib.context import CryptContext
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from .config import settings
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from .datetime import utc_now
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pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
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MACHINE_TOKEN_PREFIX = "sha256$"
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def create_access_token(
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subject: Union[str, Any], expires_delta: Optional[timedelta] = None
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) -> str:
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"""Create JWT access token"""
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if expires_delta:
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expire = utc_now() + expires_delta
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else:
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expire = utc_now() + timedelta(
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minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES
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)
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to_encode = {"exp": expire, "sub": str(subject)}
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encoded_jwt = jwt.encode(to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM)
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return encoded_jwt
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def verify_password(plain_password: str, hashed_password: str) -> bool:
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"""Verify a password against a 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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"""Hash a password"""
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return pwd_context.hash(password)
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def get_machine_token_hash(token: str) -> str:
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"""Hash a machine token for fast constant-time verification."""
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digest = hashlib.sha256(token.encode("utf-8")).hexdigest()
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return f"{MACHINE_TOKEN_PREFIX}{digest}"
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def verify_machine_token(token: str, stored_hash: str) -> bool:
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"""Verify a machine token, supporting legacy bcrypt hashes during migration."""
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if not stored_hash:
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return False
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if stored_hash.startswith(MACHINE_TOKEN_PREFIX):
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expected_hash = get_machine_token_hash(token)
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return hmac.compare_digest(expected_hash, stored_hash)
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return verify_password(token, stored_hash)
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def is_machine_token_hash(stored_hash: str | None) -> bool:
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return bool(stored_hash and stored_hash.startswith(MACHINE_TOKEN_PREFIX))
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def decode_token(token: str) -> Optional[str]:
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"""Decode JWT token and return subject"""
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try:
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payload = jwt.decode(
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token, settings.SECRET_KEY, algorithms=[settings.ALGORITHM]
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)
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return payload.get("sub")
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except JWTError:
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return None
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