Complete backend infrastructure and authentication system

Co-authored-by: mblanke <9078342+mblanke@users.noreply.github.com>

backend/app/core/security.py

@@ -0,0 +1,58 @@
+from datetime import datetime, timedelta
+from typing import Optional
+from jose import JWTError, jwt
+from passlib.context import CryptContext
+
+from app.core.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"""
+    return pwd_context.verify(plain_password, hashed_password)
+
+
+def get_password_hash(password: str) -> str:
+    """Hash a password using bcrypt"""
+    return pwd_context.hash(password)
+
+
+def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -> str:
+    """
+    Create a JWT access token
+    
+    Args:
+        data: Dictionary containing user_id, tenant_id, role
+        expires_delta: Optional expiration time delta
+    
+    Returns:
+        Encoded JWT token
+    """
+    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 verify_token(token: str) -> Optional[dict]:
+    """
+    Verify and decode a JWT token
+    
+    Args:
+        token: JWT token string
+    
+    Returns:
+        Decoded token payload or None if invalid
+    """
+    try:
+        payload = jwt.decode(token, settings.secret_key, algorithms=[settings.algorithm])
+        return payload
+    except JWTError:
+        return None