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| <a class="dida" href="terms.pdf"><img alt="PDF -icon" src="../../../../skin/images/pdfdoc.gif" class="skin"><br> |
| PDF</a> |
| </div> |
| <h1>Basic Terms</h1> |
| <div id="front-matter"> |
| <div id="minitoc-area"> |
| <ul class="minitoc"> |
| <li> |
| <a href="#Role">Role</a> |
| </li> |
| <li> |
| <a href="#Identifiable">Identifiable</a> |
| </li> |
| <li> |
| <a href="#Identity">Identity</a> |
| </li> |
| <li> |
| <a href="#Accreditable">Accreditable</a> |
| </li> |
| <li> |
| <a href="#Credential">Credential</a> |
| </li> |
| <li> |
| <a href="#Policy">Policy</a> |
| </li> |
| </ul> |
| </div> |
| </div> |
| |
| |
| <a name="N1000E"></a><a name="Role"></a> |
| <h2 class="h3">Role</h2> |
| <div class="section"> |
| <p> |
| <em>Role</em>s are the connection between access control and CMS functionality. On |
| the access control side, you assign <em>Role</em>s to users, IP address ranges and |
| groups at certain URL spaces. On the CMS side, you define which <em>Role</em>s are |
| needed to execute certain usecases and workflow transitions. If the client has a certain |
| <em>Role</em>, this means he is allowed to do something.</p> |
| <p>Each <em>Role</em> has a unique name. Role names can be arbitrary strings. Examples are</p> |
| <ul> |
| |
| <li>author</li> |
| |
| <li>reviewer</li> |
| |
| <li>admin</li> |
| |
| </ul> |
| <p>Another common approach and useful is to use verbs as role names:</p> |
| <ul> |
| |
| <li>edit</li> |
| |
| <li>review</li> |
| |
| <li>administrate</li> |
| |
| </ul> |
| </div> |
| |
| |
| |
| <a name="N10044"></a><a name="Identifiable"></a> |
| <h2 class="h3">Identifiable</h2> |
| <div class="section"> |
| <p>An <em>Identifiable</em> is a characteristic of the client that can be identified. |
| Every <em>Identifiable</em> is <em>Accreditable</em>. Lenya currently supports the following |
| <em>Identifiable</em>s:</p> |
| <ul> |
| |
| <li>users</li> |
| |
| <li>machines</li> |
| |
| <li>the world (this idenitifiable is assigned to every client that tries to |
| access the system)</li> |
| |
| </ul> |
| </div> |
| |
| |
| |
| <a name="N10066"></a><a name="Identity"></a> |
| <h2 class="h3">Identity</h2> |
| <div class="section"> |
| <p>An <em>Identity</em> is the collection of all <em>Identifiable</em>s |
| that have access to the |
| system in the current session. The <em>Identity</em> always contains the world and |
| the machine that produced the request. If you logged in, the user is also |
| contained in the <em>Identity</em>.</p> |
| <p>For instance, if you log in from the machine 192.168.0.16 as the user john, |
| the <em>Identity</em> of the client contains</p> |
| <ul> |
| |
| <li>the machine 192.168.0.16,</li> |
| |
| <li>the user john, and</li> |
| |
| <li>the world.</li> |
| |
| </ul> |
| </div> |
| |
| |
| |
| <a name="N1008D"></a><a name="Accreditable"></a> |
| <h2 class="h3">Accreditable</h2> |
| <div class="section"> |
| <p>An <em>Accreditable</em> can be accredited with <em>Role</em>s in <em>Policies</em>. |
| Lenya currently supports the following <em>Accreditable</em>s:</p> |
| <ul> |
| |
| <li>users</li> |
| |
| <li>machines (accredition not implemented, use IP ranges instead)</li> |
| |
| <li>IP address ranges</li> |
| |
| <li>the world</li> |
| |
| <li>groups</li> |
| |
| </ul> |
| </div> |
| |
| |
| |
| <a name="N100B4"></a><a name="Credential"></a> |
| <h2 class="h3">Credential</h2> |
| <div class="section"> |
| <p>A <em>Credential</em> assigns a set of <em>Role</em>s to an <em>Accreditable</em>, e.g.:</p> |
| <ul> |
| |
| <li> |
| <span class="codefrag">news_editors: editor, reviewer</span> |
| <br> means "The group |
| <span class="codefrag">news_editors</span> has the <em>Role</em>s <span class="codefrag">editor</span> and <span class="codefrag"> |
| reviewer</span>."</li> |
| |
| </ul> |
| </div> |
| |
| |
| |
| <a name="N100DC"></a><a name="Policy"></a> |
| <h2 class="h3">Policy</h2> |
| <div class="section"> |
| <p>A <em>Policy</em> defines a set of <em>Credential</em>s for a certain URL. It has the |
| responsibility to return all <em>Role</em>s of an <em>Accreditable</em> at a certain URL.</p> |
| <p>If for instance the <em>Policy</em> for the URL /tv/news contains the <em>Credential</em>s</p> |
| <ul> |
| |
| <li> |
| |
| <span class="codefrag">news_editors: editor, reviewer</span> |
| |
| </li> |
| |
| <li> |
| |
| <span class="codefrag">john: admin</span> |
| |
| </li> |
| |
| <li> |
| |
| <span class="codefrag">192.168.0.72: visitor</span> |
| |
| </li> |
| |
| </ul> |
| <p>and user <span class="codefrag">john</span> belongs to the group <span class="codefrag">news_editors</span> |
| and has logged in from the machine <span class="codefrag">192.168.0.72</span>, the <em>Policy</em> |
| returns the <em>Role</em>s <span class="codefrag">editor, reviewer, admin, visitor</span> for the |
| <em>Accreditable</em> <span class="codefrag">john</span>.</p> |
| <p>A <em>Policy</em> may not contain invalid <em>Accreditable</em>s. |
| E.g., if a user is deleted |
| and another user with the same ID is created, he may not get the same |
| privileges as the former one.</p> |
| </div> |
| |
| |
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