Initial commit

backend/app/core/security.py

@@ -0,0 +1,94 @@
+"""Security utilities for authentication and authorization."""
+
+from datetime import datetime, timedelta
+from typing import Optional, Dict, Any
+from jose import JWTError, jwt
+from passlib.context import CryptContext
+
+from app.config import settings
+
+
+# Password hashing context
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+
+
+def verify_password(plain_password: str, hashed_password: str) -> bool:
+    """
+    Verify a plain password against a hashed password.
+
+    Args:
+        plain_password: The plain text password
+        hashed_password: The hashed password to compare against
+
+    Returns:
+        True if password matches, False otherwise
+    """
+    return pwd_context.verify(plain_password, hashed_password)
+
+
+def get_password_hash(password: str) -> str:
+    """
+    Hash a password using bcrypt.
+
+    Args:
+        password: The plain text password to hash
+
+    Returns:
+        The hashed password
+    """
+    return pwd_context.hash(password)
+
+
+def create_access_token(
+    data: Dict[str, Any],
+    expires_delta: Optional[timedelta] = None
+) -> str:
+    """
+    Create a JWT access token.
+
+    Args:
+        data: Dictionary containing claims to encode in the token
+        expires_delta: Optional expiration time delta
+
+    Returns:
+        Encoded JWT token string
+    """
+    to_encode = data.copy()
+
+    if expires_delta:
+        expire = datetime.utcnow() + expires_delta
+    else:
+        expire = datetime.utcnow() + timedelta(
+            minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES
+        )
+
+    to_encode.update({"exp": expire})
+
+    encoded_jwt = jwt.encode(
+        to_encode,
+        settings.SECRET_KEY,
+        algorithm=settings.ALGORITHM
+    )
+
+    return encoded_jwt
+
+
+def decode_access_token(token: str) -> Dict[str, Any]:
+    """
+    Decode and validate a JWT access token.
+
+    Args:
+        token: The JWT token string to decode
+
+    Returns:
+        Dictionary containing the decoded token payload
+
+    Raises:
+        JWTError: If token is invalid or expired
+    """
+    payload = jwt.decode(
+        token,
+        settings.SECRET_KEY,
+        algorithms=[settings.ALGORITHM]
+    )
+    return payload