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aria-hidden="true">5.</strong> PAM and nsswitch</a></li><li class="chapter-item expanded "><a href="../../ssh_key_dist.html"><strong aria-hidden="true">6.</strong> SSH Key Distribution</a></li><li class="chapter-item expanded "><a href="../../integrations/oauth2.html"><strong aria-hidden="true">7.</strong> Oauth2</a></li><li class="chapter-item expanded "><a href="../../integrations/ldap.html"><strong aria-hidden="true">8.</strong> LDAP</a></li><li class="chapter-item expanded "><a href="../../integrations/radius.html"><strong aria-hidden="true">9.</strong> RADIUS</a></li><li class="chapter-item expanded affix "><li class="part-title">Synchronisation</li><li class="chapter-item expanded "><a href="../../sync/concepts.html"><strong aria-hidden="true">10.</strong> Concepts</a></li><li class="chapter-item expanded "><a href="../../sync/freeipa.html"><strong aria-hidden="true">11.</strong> FreeIPA</a></li><li class="chapter-item expanded affix "><li class="part-title">Integration 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aria-hidden="true">17.</strong> Developer Guide</a></li><li class="chapter-item expanded "><a href="../../developers/faq.html"><strong aria-hidden="true">18.</strong> FAQ</a></li><li class="chapter-item expanded "><div><strong aria-hidden="true">19.</strong> Design Documents</div></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../developers/designs/access_profiles_rework_2022.html"><strong aria-hidden="true">19.1.</strong> Access Profiles 2022</a></li><li class="chapter-item expanded "><a href="../../developers/designs/access_profiles_and_security.html"><strong aria-hidden="true">19.2.</strong> Access Profiles Original</a></li><li class="chapter-item expanded "><a href="../../developers/designs/rest_interface.html"><strong aria-hidden="true">19.3.</strong> REST Interface</a></li><li class="chapter-item expanded "><a href="../../developers/designs/elevated_priv_mode.html" class="active"><strong aria-hidden="true">19.4.</strong> Elevated Priv Mode</a></li></ol></li><li class="chapter-item expanded "><a href="../../developers/python.html"><strong aria-hidden="true">20.</strong> Python Module</a></li><li class="chapter-item expanded "><a href="../../developers/radius.html"><strong aria-hidden="true">21.</strong> RADIUS Integration</a></li><li class="chapter-item expanded "><a href="../../packaging.html"><strong aria-hidden="true">22.</strong> Packaging</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../packaging_debs.html"><strong aria-hidden="true">22.1.</strong> Debian/Ubuntu</a></li></ol></li></ol>
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<h1 id="elevation-of-privilege-inside-user-sessions"><a class="header" href="#elevation-of-privilege-inside-user-sessions">Elevation of Privilege Inside User Sessions</a></h1>
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<p>To improve user experience, we need to allow long lived sessions in browsers. This is especially
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important as a single sign on system, users tend to be associated 1 to 1 with devices, and by having
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longer lived sessions, they have a smoother experience.</p>
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<p>However, we also don't want user sessions to have unbound write permissions for the entire (possibly
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unlimited) duration of their session.</p>
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<p>Prior art for this is github, which has unbounded sessions on machines and requests a
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re-authentication when a modifying or sensitive action is to occur.</p>
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<p>For us to implement this will require some changes to how we manage sessions.</p>
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<h2 id="session-issuance"><a class="header" href="#session-issuance">Session Issuance</a></h2>
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<ul>
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<li>
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<p>ISSUE: Sessions are issued identically for service-accounts and persons</p>
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</li>
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<li>
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<p>CHANGE: service-accounts require a hard/short session expiry limit and always have elevated
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permissions</p>
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</li>
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<li>
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<p>CHANGE: persons require no session expiry and must request elevation for privs.</p>
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</li>
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<li>
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<p>ISSUE: Sessions currently indicate all read-write types as the same access scope type.</p>
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</li>
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<li>
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<p>CHANGE: Split sessions to show rwalways, rwcapable, rwactive</p>
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</li>
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<li>
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<p>ISSUE: Sessions currently are recorded identically between service-accounts, persons, and api
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tokens</p>
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</li>
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<li>
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<p>CHANGE: Change the session storage types to have unique session types for these ✅</p>
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</li>
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<li>
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<p>ISSUE: Access Scope types are confused by api session using the same types.</p>
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</li>
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<li>
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<p>CHANGE: Use access scope only as the end result of current effective permission calculation and
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not as a method to convert to anything else. ✅</p>
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<p>AccessScope { ReadOnly, ReadWrite, Synchronise }</p>
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<p>// Bound by token expiry ApiTokenScope { ReadOnly, ReadWrite, Synchronise }</p>
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<p>UatTokenScope { ReadOnly, // Want to avoid "read write" here to prevent dev confusion.
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PrivilegeCapable, PrivilegeActive { expiry }, ReadWrite, }</p>
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<p>SessionScope { Ro, RwAlways, PrivCapable, }</p>
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<p>ApiTokenScope { RO RW Sync }</p>
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<p>AuthSession if service account rw always, bound expiry</p>
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<pre><code>if person
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priv cap, unbound exp
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- Should we have a "trust the machine flag" to limit exp though?
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- can we do other types of cryptographic session binding?
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</code></pre>
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</li>
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</ul>
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<h2 id="session-validation"><a class="header" href="#session-validation">Session Validation</a></h2>
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<ul>
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<li>CHANGE: Session with PrivCapable indicates that re-auth can be performed.</li>
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<li>CHANGE: Improve how Uat/Api Token scopes become Access Scopes</li>
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<li>CHANGE: Remove all AccessScope into other types. ✅</li>
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</ul>
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<h2 id="session-re-authentication"><a class="header" href="#session-re-authentication">Session Re-Authentication</a></h2>
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<ul>
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<li>
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<p>Must be performed by the same credential that issued the session originally</p>
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<ul>
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<li>This is now stored in the session metadata itself.</li>
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<li>Does it need to be in the cred-id?</li>
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</ul>
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</li>
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<li>
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<p>CHANGE: Store the cred id in UAT so that a replica can process the operation in a replication sync
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failure?</p>
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<ul>
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<li>This would rely on re-writing the session.</li>
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</ul>
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</li>
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<li>
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<p>CHANGE: Should we record in the session when priv-escalations are performed?</p>
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</li>
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</ul>
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<h2 id="misc"><a class="header" href="#misc">Misc</a></h2>
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<ul>
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<li>CHANGE: Compact/shrink UAT size if possible.</li>
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</ul>
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<h2 id="diagram"><a class="header" href="#diagram">Diagram</a></h2>
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<pre><code> Set
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┌───────────────────────PrivActive────────────────────┐
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│ + Exp │
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│ │
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┌ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ┐ │ .───────────. ┌────────────────┐
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│ ┌────────────────▶( If Priv Cap )───────▶│Re-Auth-Allowed │
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│ │ │ │ `───────────' └────────────────┘
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DB Content ┌ ─ ─ ─ ┼ ─ ┼ ─ ─ ─ ─ ─ ─ ─ ─
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┌───────────────────┐ │ │ JWT │ │ │
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│ │ │ ▼ │
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│ AuthSession │ │ ┌──────────────┐ │ ┌──────────────┐ │
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│ │ │SessionScope │ │ │UatScope │
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│ Service Account │ │ │- RO │ │ │- RO │ │
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│ -> RWAlways │──────────────────▶│- RW │─────────┼──▶│- RW │──────────────────────────┐
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│ │ │ │- PrivCapable │ │ │- PrivCapable │ │ │
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│ Person │ └──────────────┘ │ │- PrivActive │ │
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│ -> PrivCap │ │ │ └──────────────┘ │ │
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│ │ │ │
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└───────────────────┘ │ │ │ ▼
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│ ┌──────────────┐
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│ │ │ │AccessScope │ ┌───────────────┐
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│ │- RO │ │ │
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│ │ │ │- RW │───────────▶ │Access Controls│
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│ │- Sync │ │ │
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┌───────────────────┐ │ ┌─────────────────┐ │ ┌──────────────┐ │ └──────────────┘ └───────────────┘
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│ │ │ApiSessionScope │ │ │ApiTokenScope │ ▲
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│ Create API Token │ │ │- RO │ │ │- RO │ │ │
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│ │───────────────▶│- RW │────────┼───▶│- RW │─────────────────────────┘
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│Access Based On Req│ │ │- Sync │ │ │- Sync │ │
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│ │ └─────────────────┘ │ │ │
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└───────────────────┘ │ │ └──────────────┘ │
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│
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│ │ │
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─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ └ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─
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</code></pre>
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<h2 id="todo"><a class="header" href="#todo">TODO:</a></h2>
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<ol>
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<li>Remove the ident-only access scope, it's useless! ✅</li>
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<li>Split tokens to have a dedicated session type separate to uat sessions. ✅</li>
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<li>Change uat session access scope recording to match service-account vs person intent.</li>
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<li>Change UAT session issuance to have the uat purpose reflect the readwrite or readwrite-capable
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nature of the session, based on <em>auth-type</em> that was used.</li>
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<li>Based on auth-type, limit or unlimit expiry to match the intent of the session.</li>
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