Sicurezza Redshift

Introduzione a Redshift

Jason Myers

Principal Engineer

Sicurezza Redshift

Controllo accesso a livello di colonna
Row-level security tramite policy
Data masking tramite policy

Portafoglio sicurezza Redshift

Permessi a livello di colonna

Nasconde completamente una colonna
Puoi verificare con SVV_COLUMN_PRIVILEGES

SELECT *
  FROM SVV_COLUMN_PRIVILEGES
 WHERE relation_name = 'products';

relation_name | column_name  | privilege_type | identity_name | identity_type
==============|==============|================|===============|==============
products      | product_name | SELECT         | amelia        | user
products      | product_name | SELECT         | analytics     | role

Row-level security

Policy che prefiltrano i dati

CREATE RLS POLICY policy_books
WITH (category VARCHAR(255))
USING (category = 'Dark Academia');

SELECT product_line, category, product_name
FROM products;

product_line | category      | product_name
=============|===============|===================
Books        | Dark Academia | A Deadly Education

Row-level security

SVV_RLS_POLICY per visualizzare le policy

SELECT polname AS policy_name, 
       polatts AS column_details,
       polqual AS condition
  FROM SVV_RLS_POLICY;

policy_name  | column_details                                 | condition
 ============|================================================|===========================
policy_books | [{"colname":"category","type":"VARCHAR(255)"}] | category = 'Dark Academia'

Vista admin per Row-level security

SVV_RLS_APPLIED_POLICY può essere usata dai superuser per vedere le query interessate

SELECT username, 
       command, 
       relschema, 
       relname, 
       polname,
FROM SVV_RLS_APPLIED_POLICY;

username | command | relschema | relname  | polname  
=========|=========|===========|==========|=============
aashvi   |    s    | public    | products | policy_books

Panoramica Dynamic Masking

Policy che offusca i valori restituiti da una query
Solo un superuser o chi ha i permessi può vederli
Usi
- Numeri ID nazionali (es. Social Security Number)
- Carte di credito

SELECT name, social_security_number
  FROM customers;

name     | social_security_number
======== | =======================
John Doe | XXX-XX-1234
Jane Doe | XXX-XX-5678

Passons à la pratique !

Introduzione a Redshift