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from typing import Dict, List, Any, Optional
from pydantic import BaseModel
from datetime import datetime, timedelta
import jwt
from passlib.hash import bcrypt
from enum import Enum
import uuid
class UserRole(Enum):
ADMIN = "admin"
USER = "user"
VIEWER = "viewer"
class Permission(Enum):
READ = "read"
WRITE = "write"
EXECUTE = "execute"
MANAGE = "manage"
class User(BaseModel):
"""User model"""
id: str
username: str
email: str
hashed_password: str
role: UserRole
tenant_id: str
permissions: List[Permission]
metadata: Dict[str, Any]
created_at: datetime
last_login: Optional[datetime]
is_active: bool = True
class Tenant(BaseModel):
"""Tenant model for multi-tenancy"""
id: str
name: str
config: Dict[str, Any]
created_at: datetime
features: List[str]
is_active: bool = True
class AuthManager:
"""Handles authentication and authorization"""
def __init__(self, config: Dict[str, Any]):
self.config = config
self.secret_key = config['secret_key']
self.token_expiry = config.get('token_expiry', 3600) # 1 hour default
async def create_user(
self,
username: str,
email: str,
password: str,
role: UserRole,
tenant_id: str,
permissions: List[Permission]
) -> User:
"""Create new user"""
hashed_password = bcrypt.hash(password)
user = User(
id=str(uuid.uuid4()),
username=username,
email=email,
hashed_password=hashed_password,
role=role,
tenant_id=tenant_id,
permissions=permissions,
metadata={},
created_at=datetime.now()
)
# Store user in database
await self.store_user(user)
return user
async def authenticate(self, username: str, password: str) -> Optional[str]:
"""Authenticate user and return JWT token"""
user = await self.get_user_by_username(username)
if not user or not user.is_active:
return None
if not bcrypt.verify(password, user.hashed_password):
return None
# Update last login
user.last_login = datetime.now()
await self.update_user(user)
# Generate JWT token
token_data = {
'sub': user.id,
'username': user.username,
'role': user.role.value,
'tenant_id': user.tenant_id,
'permissions': [p.value for p in user.permissions],
'exp': datetime.utcnow() + timedelta(seconds=self.token_expiry)
}
return jwt.encode(token_data, self.secret_key, algorithm='HS256')
async def verify_token(self, token: str) -> Optional[Dict[str, Any]]:
"""Verify JWT token and return payload"""
try:
payload = jwt.decode(token, self.secret_key, algorithms=['HS256'])
return payload
except jwt.ExpiredSignatureError:
return None
except jwt.InvalidTokenError:
return None
async def has_permission(
self,
user_id: str,
permission: Permission,
resource: str
) -> bool:
"""Check if user has specific permission"""
user = await self.get_user(user_id)
if not user or not user.is_active:
return False
# Admin role has all permissions
if user.role == UserRole.ADMIN:
return True
# Check specific permission
return permission in user.permissions
class AuditLogger:
"""Handles audit logging"""
def __init__(self, storage_manager: Any):
self.storage = storage_manager
async def log_event(
self,
event_type: str,
user_id: str,
tenant_id: str,
resource: str,
action: str,
status: str,
details: Dict[str, Any]
):
"""Log audit event"""
event = {
'event_type': event_type,
'user_id': user_id,
'tenant_id': tenant_id,
'resource': resource,
'action': action,
'status': status,
'details': details,
'timestamp': datetime.now().isoformat()
}
await self.storage.store(
type=StorageType.AUDIT,
data=event,
tenant_id=tenant_id
)
class SecurityManager:
"""Main security manager"""
def __init__(self, config: Dict[str, Any], storage_manager: Any):
self.config = config
self.auth_manager = AuthManager(config)
self.audit_logger = AuditLogger(storage_manager)
async def initialize_tenant(
self,
name: str,
features: List[str],
config: Dict[str, Any]
) -> Tenant:
"""Initialize new tenant"""
tenant = Tenant(
id=str(uuid.uuid4()),
name=name,
config=config,
features=features,
created_at=datetime.now()
)
# Store tenant
await self.store_tenant(tenant)
return tenant
async def handle_request(
self,
token: str,
resource: str,
action: Permission
) -> Optional[Dict[str, Any]]:
"""Handle authenticated request"""
# Verify token
payload = await self.auth_manager.verify_token(token)
if not payload:
return None
# Check permission
has_permission = await self.auth_manager.has_permission(
payload['sub'],
action,
resource
)
if not has_permission:
return None
# Log access
await self.audit_logger.log_event(
event_type="access",
user_id=payload['sub'],
tenant_id=payload['tenant_id'],
resource=resource,
action=action.value,
status="success",
details={}
)
return payload
# Example usage:
security_config = {
'secret_key': 'your-secret-key',
'token_expiry': 3600,
'password_policy': {
'min_length': 8,
'require_special': True
}
}
security_manager = SecurityManager(security_config, storage_manager) |