86 lines
2.4 KiB
Python
86 lines
2.4 KiB
Python
"""
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Security utilities for authentication and password hashing.
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Implements JWT token management and bcrypt password hashing with salt.
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"""
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from datetime import datetime, timedelta, timezone
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from typing import Optional
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from jose import JWTError, jwt
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from passlib.context import CryptContext
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from app.core.settings import get_settings
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settings = get_settings()
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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 a bcrypt hash."""
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return pwd_context.verify(plain_password, hashed_password)
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def hash_password(password: str) -> str:
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"""Hash a password using bcrypt with configurable rounds."""
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return pwd_context.hash(password, rounds=settings.BCRYPT_ROUNDS)
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def create_access_token(
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subject: str,
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expires_delta: Optional[timedelta] = None,
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) -> str:
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"""Create a JWT access token."""
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if expires_delta:
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expire = datetime.now(timezone.utc) + expires_delta
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else:
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expire = datetime.now(timezone.utc) + timedelta(
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minutes=settings.JWT_ACCESS_TOKEN_EXPIRE_MINUTES
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)
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payload = {
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"sub": subject,
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"exp": expire,
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"iat": datetime.now(timezone.utc),
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"type": "access",
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}
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return jwt.encode(payload, settings.SECRET_KEY, algorithm=settings.JWT_ALGORITHM)
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def create_refresh_token(subject: str) -> str:
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"""Create a JWT refresh token with longer expiry."""
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expire = datetime.now(timezone.utc) + timedelta(
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days=settings.JWT_REFRESH_TOKEN_EXPIRE_DAYS
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)
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payload = {
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"sub": subject,
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"exp": expire,
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"iat": datetime.now(timezone.utc),
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"type": "refresh",
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}
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return jwt.encode(payload, settings.SECRET_KEY, algorithm=settings.JWT_ALGORITHM)
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def decode_token(token: str) -> Optional[dict]:
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"""Decode and validate a JWT token."""
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try:
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payload = jwt.decode(
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token,
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settings.SECRET_KEY,
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algorithms=[settings.JWT_ALGORITHM],
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)
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return payload
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except JWTError:
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return None
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def get_current_user(token: str) -> Optional[dict]:
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"""Extract user info from JWT token."""
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payload = decode_token(token)
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if not payload:
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return None
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if payload.get("type") != "access":
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return None
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return {
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"user_id": payload.get("sub"),
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"token_type": payload.get("type"),
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}
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