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| <li><a href="protocol-specification-acks.html">Acknowledgements</a></li> |
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| <li><a href="protocol-specification-policies.html">Policies group</a></li> |
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| <li class="subfolders"> |
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| <ul> |
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| <li><a href="protocol-examples-creatething.html">Create a Thing</a></li> |
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| <li><a href="protocol-examples-retrievething.html">Retrieve a Thing</a></li> |
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| <li><a href="protocol-examples-retrievethings.html">Retrieve multiple Things</a></li> |
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| <li><a href="protocol-examples-modifypolicyid.html">Modify the Policy ID of a Thing</a></li> |
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| <li><a href="protocol-examples-createattributes.html">Create Attributes</a></li> |
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| <li><a href="protocol-examples-modifyattributes.html">Modify Attributes</a></li> |
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| <li><a href="protocol-examples-retrieveattributes.html">Retrieve Attributes</a></li> |
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| <li><a href="protocol-examples-createattribute.html">Create a single Attribute</a></li> |
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| <li><a href="protocol-examples-deleteattribute.html">Delete a single Attribute</a></li> |
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| <li><a href="protocol-examples-modifyattribute.html">Modify a single Attribute</a></li> |
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| <li><a href="protocol-examples-retrieveattribute.html">Retrieve a single Attribute</a></li> |
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| <li><a href="protocol-examples-createthingdefinition.html">Create a Definition</a></li> |
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| <li><a href="protocol-examples-modifythingdefinition.html">Modify a Definition</a></li> |
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| <li><a href="protocol-examples-retrievethingdefinition.html">Retrieve a Definition</a></li> |
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| <li><a href="protocol-examples-createfeatures.html">Create Features</a></li> |
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| <li><a href="protocol-examples-deletefeatures.html">Delete Features</a></li> |
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| <li><a href="protocol-examples-modifyfeatures.html">Modify Features</a></li> |
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| <li><a href="protocol-examples-retrievefeatures.html">Retrieve Features</a></li> |
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| <li><a href="protocol-examples-createfeature.html">Create a single Feature</a></li> |
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| <li><a href="protocol-examples-deletefeature.html">Delete a single Feature</a></li> |
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| <li><a href="protocol-examples-modifyfeature.html">Modify a single Feature</a></li> |
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| <li><a href="protocol-examples-retrievefeature.html">Retrieve a single Feature</a></li> |
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| <li><a href="protocol-examples-createdefinition.html">Create Feature Definition</a></li> |
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| <li><a href="protocol-examples-retrievedefinition.html">Retrieve Feature Definition</a></li> |
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| <li><a href="protocol-examples-createproperties.html">Create Feature Properties</a></li> |
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| <li><a href="protocol-examples-retrieveproperties.html">Retrieve Feature Properties</a></li> |
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| <li><a href="protocol-examples-createproperty.html">Create a single Property</a></li> |
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| <li><a href="protocol-examples-deleteproperty.html">Delete a single Property</a></li> |
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| <li><a href="protocol-examples-modifyproperty.html">Modify a single Property</a></li> |
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| <li><a href="protocol-examples-retrieveproperty.html">Retrieve a single Property</a></li> |
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| <li><a href="protocol-examples-createdesiredproperties.html">Create desired Feature Properties</a></li> |
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| <li><a href="protocol-examples-deletedesiredproperties.html">Delete desired Feature Properties</a></li> |
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| <li><a href="protocol-examples-modifydesiredproperties.html">Modify desired Feature Properties</a></li> |
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| <li><a href="protocol-examples-retrievedesiredproperties.html">Retrieve desired Feature Properties</a></li> |
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| <li><a href="protocol-examples-createdesiredproperty.html">Create a single desired Property</a></li> |
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| <li><a href="protocol-examples-deletedesiredproperty.html">Delete a single desired Property</a></li> |
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| <li><a href="protocol-examples-modifydesiredproperty.html">Modify a single desired Property</a></li> |
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| <li><a href="protocol-examples-retrievedesiredproperty.html">Retrieve a single desired Property</a></li> |
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| <li><a href="protocol-examples-errorresponses.html">Error responses</a></li> |
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| </ul> |
| </li> |
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| <li class="subfolders"> |
| <a href="#"><span></span>→ Policies examples</a> |
| <ul> |
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| <li><a href="protocol-examples-policies-createpolicy.html">Create a Policy</a></li> |
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| <li><a href="protocol-examples-policies-deletepolicy.html">Delete a Policy</a></li> |
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| <li><a href="protocol-examples-policies-modifypolicy.html">Modify a Policy</a></li> |
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| <li><a href="protocol-examples-policies-retrievepolicy.html">Retrieve a Policy</a></li> |
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| <li><a href="protocol-examples-policies-modifypolicyentries.html">Modify entries</a></li> |
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| <li><a href="protocol-examples-policies-retrievepolicyentries.html">Retrieve entries</a></li> |
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| <li><a href="protocol-examples-policies-createpolicyentry.html">Create a single entry</a></li> |
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| <li><a href="protocol-examples-policies-deletepolicyentry.html">Delete a single entry</a></li> |
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| <li><a href="protocol-examples-policies-modifypolicyentry.html">Modify a single entry</a></li> |
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| <li><a href="protocol-examples-policies-retrievepolicyentry.html">Retrieve a single entry</a></li> |
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| <li><a href="protocol-examples-policies-modifysubjects.html">Modify subjects</a></li> |
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| <li><a href="protocol-examples-policies-retrievesubjects.html">Retrieve subjects</a></li> |
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| <li><a href="protocol-examples-policies-createsubject.html">Create a single subject</a></li> |
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| <li><a href="protocol-examples-policies-deletesubject.html">Delete a single subject</a></li> |
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| <li><a href="protocol-examples-policies-modifysubject.html">Modify a single subject</a></li> |
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| <li><a href="protocol-examples-policies-retrievesubject.html">Retrieve a single subject</a></li> |
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| <li><a href="protocol-examples-policies-modifyresources.html">Modify resources</a></li> |
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| <li><a href="protocol-examples-policies-retrieveresources.html">Retrieve resources</a></li> |
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| <li><a href="protocol-examples-policies-createresource.html">Create a single resource</a></li> |
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| <li><a href="protocol-examples-policies-deleteresource.html">Delete a single resource</a></li> |
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| <li><a href="protocol-examples-policies-modifyresource.html">Modify a single resource</a></li> |
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| <li><a href="protocol-examples-policies-retrieveresource.html">Retrieve a single resource</a></li> |
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| <li><a href="protocol-examples-policies-errorresponses.html">Error responses</a></li> |
| |
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| |
| </ul> |
| </li> |
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| <li><a href="protocol-examples-search.html">→ Search examples</a></li> |
| |
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| </ul> |
| </li> |
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| <li><a href="sandbox.html">Sandbox</a></li> |
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| <p class="external"> |
| <a href="#" id="collapseAll">Collapse All</a> | <a href="#" id="expandAll">Expand All</a> |
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| |
| <!-- Content Column --> |
| <div class="col-md-9" id="tg-sb-content"> |
| <div class="post-header"> |
| <h1 class="post-title-main">Policy</h1> |
| </div> |
| |
| |
| |
| <div class="post-content"> |
| |
| |
| |
| |
| |
| <!-- this handles the automatic toc. use ## for subheads to auto-generate the on-page minitoc. if you use html tags, you must supply an ID for the heading element in order for it to appear in the minitoc. --> |
| <script> |
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| // Handler for .ready() called. |
| |
| $('#toc').toc({ minimumHeaders: 0, listType: 'ul', showSpeed: 0, headers: 'h2,h3,h4' }); |
| |
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| $(window).scrollTop(scroll_target - 10); |
| return false |
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| </script> |
| |
| <div id="toc"></div> |
| |
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| |
| <p>A Policy enables developers to configure fine-grained access control for Things and other entities in an easy way.</p> |
| |
| <div class="alert alert-info" role="alert"><i class="fa fa-info-circle"></i> <b>Note:</b> The policy concept is only supported for Ditto <strong>HTTP API version 2</strong>. <br /> |
| Find the HTTP API reference at <a href="http-api-doc.html?urls.primaryName=api2#/Policies">Policies resources</a>.</div> |
| |
| <h2 id="authorization-concept">Authorization concept</h2> |
| |
| <p>A specific policy provides someone (called subject), permission to read and/or write a given resource.</p> |
| |
| <div class="alert alert-success" role="alert"><i class="fa fa-check-square-o"></i> <b>Tip:</b> The write permission at the policy root resource (i.e. <code class="highlighter-rouge">policy:/</code>) allows to manage the |
| policy itself.<br />Find an <a href="basic-policy.html#example">example</a> at the end of the page.</div> |
| |
| <p>Please note, that in most cases it makes sense to grant read permission in addition to a write permission, because |
| <em>write does not imply read.</em></p> |
| |
| <h2 id="who-can-be-addressed">Who can be addressed?</h2> |
| |
| <p>A Subject ID must conform to one of the following rules:</p> |
| |
| <ul> |
| <li>The ID of a User defined in the nginx reverse proxy prefixed with <code class="highlighter-rouge">nginx</code>.</li> |
| <li>Different JWT providers with their JWT “iss” fields - the currently supported are listed in the table below.</li> |
| <li>OpenID Connect compliant providers - supported providers are listed at <a href="https://openid.net/developers/certified/">OpenID Connect - Certified OpenID Provider Servers and Services</a> The <code class="highlighter-rouge">sub</code> claim and configured provider name are used in the form <code class="highlighter-rouge"><provider>:<sub-claim></code>.</li> |
| </ul> |
| |
| <table> |
| <thead> |
| <tr> |
| <th>Prefix</th> |
| <th>Type</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td>google</td> |
| <td>jwt</td> |
| <td>A <a href="#" data-toggle="tooltip" data-original-title="JSON Web Token (JWT)">JWT</a> issued by Google</td> |
| </tr> |
| </tbody> |
| </table> |
| |
| <h2 id="which-resources-can-be-controlled">Which Resources can be controlled?</h2> |
| |
| <p>A Policy can contain access control definitions for several resources:</p> |
| |
| <ul> |
| <li><strong>Policy:</strong> Someone who was granted write permission at the policy root resource (i.e. <code class="highlighter-rouge">policy:/</code>) is allowed to |
| manage the policy itself.</li> |
| <li><strong>Thing:</strong> The resource can be defined as fine-grained as necessary for the respective use case: e.g. <code class="highlighter-rouge">thing:/</code> as |
| top-level resource or on sub-resources such as <code class="highlighter-rouge">thing:/features</code>. |
| At runtime, the permissions are propagated down to all Thing sub-entities. |
| <ul> |
| <li>In case you grant read permission on top-level and revoke it at a sub-entity, the subject can read the upper |
| part only.</li> |
| <li>In case you omit a subject at top-level but grant permission at a sub-entity, the subject can access the lower |
| part only (and the Thing ID).</li> |
| </ul> |
| </li> |
| </ul> |
| |
| <h2 id="policy">Policy</h2> |
| |
| <p>The Policy resource (addressable as <code class="highlighter-rouge">policy:/</code>) defines the access control for the Policy itself.</p> |
| |
| <div class="alert alert-success" role="alert"><i class="fa fa-check-square-o"></i> <b>Tip:</b> Please make sure to define at least one user (for which you have the credentials) with |
| top-level <em>read</em> and <em>write</em> permissions on the Policy, otherwise you won’t be able to access/change it.</div> |
| |
| <table> |
| <thead> |
| <tr> |
| <th>Resource</th> |
| <th>Addressed data, description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td>policy:/</td> |
| <td>The Policy itself (top-level)<br />Applies to the Policy and all of its sub-resources.</td> |
| </tr> |
| <tr> |
| <td>policy:/policyId</td> |
| <td>The Policy’s ID.<br />However, such a reference is <em>not recommended</em> because write is not supported anyway, and read on the ID only, does not provide any benefit.</td> |
| </tr> |
| <tr> |
| <td>policy:/entries</td> |
| <td>Applies to all entries of the Policy.</td> |
| </tr> |
| <tr> |
| <td>policy:/entries/X</td> |
| <td>Applies to all subjects and resources of the specific entry X.</td> |
| </tr> |
| <tr> |
| <td>policy:/entries/X/subjects</td> |
| <td>Applies to all subjects of the specific entry X.</td> |
| </tr> |
| <tr> |
| <td>policy:/entries/X/subjects/Y</td> |
| <td>Applies to subject Y of the specific entry X.</td> |
| </tr> |
| <tr> |
| <td>policy:/entries/X/resources</td> |
| <td>Applies to all resources of the specific entry X.</td> |
| </tr> |
| <tr> |
| <td>policy:/entries/X/resources/Y</td> |
| <td>Applies to resource Y of the specific entry X.</td> |
| </tr> |
| </tbody> |
| </table> |
| |
| <p>The <a href="basic-policy.html#example">Things example at the end of the page</a> also defines access control on the policy |
| resource.</p> |
| |
| <h2 id="thing">Thing</h2> |
| |
| <p>The Thing resource (addressable as <code class="highlighter-rouge">thing:/</code>) defines the access control for Things.</p> |
| |
| <p>The access control definitions defined in a Policy’s Thing resource will be applied to all Things referencing this |
| Policy.</p> |
| |
| <div class="alert alert-info" role="alert"><i class="fa fa-info-circle"></i> <b>Note:</b> In case you want to re-use a policy for various things, please make sure to name the |
| Policy ID differently than the Thing ID.</div> |
| |
| <table> |
| <thead> |
| <tr> |
| <th>Resource</th> |
| <th>Addressed data, description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td>thing:/</td> |
| <td>The Thing itself (top-level).<br />Applies to the Thing and all of its sub-resources.</td> |
| </tr> |
| <tr> |
| <td>thing:/thingId</td> |
| <td>The Thing’s ID.<br />Not recommended, because write is not supported anyway and read on the ID only does not provide any benefit.</td> |
| </tr> |
| <tr> |
| <td>thing:/policyId</td> |
| <td>Applies to the Policy ID of the Thing, which implicitly defines its access control.<br /><em>Please double-check write permissions on this resource.</em></td> |
| </tr> |
| <tr> |
| <td>thing:/attributes</td> |
| <td>Applies to all attributes of the Thing.</td> |
| </tr> |
| <tr> |
| <td>thing:/attributes/X</td> |
| <td>Applies to the specific attribute X and its sub-paths.<br />X may be a nested path such as tire/pressure.</td> |
| </tr> |
| </tbody> |
| </table> |
| |
| <p>Find a <a href="basic-policy.html#example">Things example at the end of the page.</a></p> |
| |
| <h2 id="feature">Feature</h2> |
| |
| <table> |
| <thead> |
| <tr> |
| <th>Resource</th> |
| <th>Addressed data, description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td>thing:/features</td> |
| <td>Applies to all Features of the Thing.</td> |
| </tr> |
| <tr> |
| <td>thing:/features/X</td> |
| <td>Applies to the Feature with ID X and all its sub-paths.</td> |
| </tr> |
| <tr> |
| <td>thing:/features/X/properties</td> |
| <td>Applies to all properties of the Feature X.</td> |
| </tr> |
| <tr> |
| <td>thing:/features/X/properties/Y</td> |
| <td>Applies to the property with path Y (and its sub-paths) of the Feature with ID X. <br />Y may be a nested path such as tire/pressure.</td> |
| </tr> |
| <tr> |
| <td>thing:/features/X/desiredProperties</td> |
| <td>Applies to all desired properties of the Feature X.</td> |
| </tr> |
| <tr> |
| <td>thing:/features/X/desiredProperties/Y</td> |
| <td>Applies to the desired property with path Y (and its sub-paths) of the Feature with ID X. <br />Y may be a nested path such as tire/pressure.</td> |
| </tr> |
| </tbody> |
| </table> |
| |
| <p>Find a <a href="basic-policy.html#example">Things example at the end of the page.</a></p> |
| |
| <h2 id="message">Message</h2> |
| |
| <p>The Message resource (addressable as <code class="highlighter-rouge">message:/</code>) defines the access control for Messages.</p> |
| |
| <p>The access control definitions defined in a Policy’s Message resource will be applied to all Messages sent to or from Things referencing this Policy.</p> |
| |
| <ul> |
| <li>For sending messages to a Thing or its Features write permission is required</li> |
| <li>For receiving messages from a Thing or its Features read permission is required.</li> |
| </ul> |
| |
| <p>Such permissions can be defined at resources of different granularity.</p> |
| |
| <table> |
| <thead> |
| <tr> |
| <th>Resource</th> |
| <th>Addressed data, description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td>message:/</td> |
| <td>All messages (top-level) <br />Applies to all messages sent to or from Things referencing this Policy and all messages sent to or from features of these Things.</td> |
| </tr> |
| <tr> |
| <td>message:/inbox</td> |
| <td>Applies to all messages sent to a specific Thing (or multiple things referencing this Policy)</td> |
| </tr> |
| <tr> |
| <td>message:/inbox/messages/X</td> |
| <td>Applies to all messages on message-subject X, sent to the Things referencing this Policy</td> |
| </tr> |
| <tr> |
| <td>message:/outbox</td> |
| <td>Applies to all messages sent from the Things referencing this Policy</td> |
| </tr> |
| <tr> |
| <td>message:/outbox/messages/X</td> |
| <td>Applies to all messages on message-subject X, sent from the Things referencing this Policy</td> |
| </tr> |
| <tr> |
| <td>message:/features</td> |
| <td>Messages for all Features <br />Applies to all messages sent to or from all Features of Things referencing this Policy</td> |
| </tr> |
| <tr> |
| <td>message:/features/Y</td> |
| <td>Applies to all messages sent to or from Feature Y of the Things referencing this Policy</td> |
| </tr> |
| <tr> |
| <td>message:/features/Y/inbox</td> |
| <td>Applies to all messages sent to Feature Y of the Things referencing this Policy</td> |
| </tr> |
| <tr> |
| <td>message:/features/Y/inbox/messages/X</td> |
| <td>Applies to all messages on message-subject X sent to Feature Y of the Things referencing this Policy</td> |
| </tr> |
| <tr> |
| <td>message:/features/Y/outbox</td> |
| <td>Applies to all messages sent from Feature Y of the Things referencing this Policy</td> |
| </tr> |
| <tr> |
| <td>message:/features/Y/outbox/messages/X</td> |
| <td>Applies to all messages on message-subject X sent from Feature Y of the Things referencing this Policy</td> |
| </tr> |
| </tbody> |
| </table> |
| |
| <div class="alert alert-success" role="alert"><i class="fa fa-check-square-o"></i> <b>Tip:</b> The resources <code class="highlighter-rouge">message:/inbox</code> and <code class="highlighter-rouge">message:/outbox</code> do not address feature-related messages. |
| For providing access to feature-related messages, you have to either grant top-level permission (<code class="highlighter-rouge">message:/</code>) or grant permission to the resource <code class="highlighter-rouge">message:/features</code> (or the required sub-resources).</div> |
| |
| <p>The <a href="basic-policy.html#example">Things example at the end of the page</a> also defines access control on messages.</p> |
| |
| <h2 id="grant-and-revoke-some-permission">Grant and Revoke some Permission</h2> |
| |
| <table> |
| <thead> |
| <tr> |
| <th>Change</th> |
| <th>Permission</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td>grant</td> |
| <td>READ</td> |
| <td>All subjects named in the section are granted <em>read</em> permission on the resources specified in the path, and all nested paths, except they are revoked at a deeper level, or another policy entry (label).</td> |
| </tr> |
| <tr> |
| <td>grant</td> |
| <td>WRITE</td> |
| <td>All subjects named in the section are granted <em>write</em> permission on the resources specified in the path, and all nested paths, except they are revoked at a deeper level, or another policy entry (label).</td> |
| </tr> |
| <tr> |
| <td>revoke</td> |
| <td>READ</td> |
| <td>All subjects named in the section are <em>prohibited to read</em> on the resources specified in the path, and all nested paths, except they are granted again such permission at a deeper level, or another policy entry (label).</td> |
| </tr> |
| <tr> |
| <td>revoke</td> |
| <td>WRITE</td> |
| <td>All subjects named in the section are <em>prohibited to write</em> on the resources specified in the path, and all nested paths, except they are granted again such permission at a deeper level, or another policy entry (label).</td> |
| </tr> |
| </tbody> |
| </table> |
| |
| <h2 id="tools-for-editing-a-policy">Tools for editing a Policy</h2> |
| |
| <p>The Policy can be edited with a text editor of your choice. |
| Just make sure it is in valid JSON representation, and that at least one valid subject is granted write permission at |
| the root resources.</p> |
| |
| <div class="alert alert-success" role="alert"><i class="fa fa-check-square-o"></i> <b>Tip:</b> The easiest way to create a Policy is to copy the model schema provided at the |
| <a href="http-api-doc.html?urls.primaryName=api2">interactive HTTP API documentation</a> and adapt it to your needs.</div> |
| |
| <p>In case of fine-grained access on Things, keep an eye on your actual Thing structure to make sure that all paths will be |
| granted or revoked the permissions your use case is supposed to support.</p> |
| |
| <h2 id="example">Example</h2> |
| |
| <p>Given you need to support the following scenario:</p> |
| |
| <ul> |
| <li>Owner: The Thing <em>my.namespace:thing-0123</em> is owned by a user. Thus, she needs full access and admin rights for the |
| complete Thing. |
| In our example her ID is <em>ditto</em></li> |
| <li>Observer of changes at featureX and featureY: |
| <ul> |
| <li>Another application needs to be informed on each change at those features. |
| In our example its ID is <em>observer-client</em>.</li> |
| <li>There is a group of users who are allowed to read both features. |
| In our example the group ID is <em>some-users</em>.</li> |
| </ul> |
| </li> |
| <li>Privacy: The value of the “city” property at “featureY” is confidential and needs to be “hidden” from the group of |
| users.</li> |
| </ul> |
| |
| <figure><img class="docimage" src="images/pages/basic/policy-example.png" alt="Policy Example" /><figcaption>Example Thing with link to a Policy ID</figcaption></figure> |
| |
| <p>Your Policy then might look like the following:</p> |
| |
| <figure><img class="docimage" src="images/pages/basic/policy-example-2.png" alt="Policy Example 2" /><figcaption>Example Policy</figcaption></figure> |
| |
| <p>The correct Policy JSON object notation would be as shown in the following code block.</p> |
| |
| <div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"policyId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"my.namespace:policy-a"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"entries"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"owner"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"subjects"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"nginx:ditto"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"type"</span><span class="p">:</span><span class="w"> </span><span class="s2">"nginx basic auth user"</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span><span class="p">},</span><span class="w"> |
| </span><span class="s2">"resources"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"thing:/"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"grant"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="s2">"READ"</span><span class="p">,</span><span class="w"> </span><span class="s2">"WRITE"</span><span class="p">],</span><span class="w"> |
| </span><span class="s2">"revoke"</span><span class="p">:</span><span class="w"> </span><span class="p">[]</span><span class="w"> |
| </span><span class="p">},</span><span class="w"> |
| </span><span class="s2">"policy:/"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"grant"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="s2">"READ"</span><span class="p">,</span><span class="w"> </span><span class="s2">"WRITE"</span><span class="p">],</span><span class="w"> |
| </span><span class="s2">"revoke"</span><span class="p">:</span><span class="w"> </span><span class="p">[]</span><span class="w"> |
| </span><span class="p">},</span><span class="w"> |
| </span><span class="s2">"message:/"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"grant"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="s2">"READ"</span><span class="p">,</span><span class="w"> </span><span class="s2">"WRITE"</span><span class="p">],</span><span class="w"> |
| </span><span class="s2">"revoke"</span><span class="p">:</span><span class="w"> </span><span class="p">[]</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span><span class="p">},</span><span class="w"> |
| </span><span class="s2">"observer"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"subjects"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"nginx:observer-client"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"type"</span><span class="p">:</span><span class="w"> </span><span class="s2">"technical client"</span><span class="w"> |
| </span><span class="p">},</span><span class="w"> |
| </span><span class="s2">"nginx:some-users"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"type"</span><span class="p">:</span><span class="w"> </span><span class="s2">"a group of users"</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span><span class="p">},</span><span class="w"> |
| </span><span class="s2">"resources"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"thing:/features/featureX"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"grant"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="s2">"READ"</span><span class="p">],</span><span class="w"> |
| </span><span class="s2">"revoke"</span><span class="p">:</span><span class="w"> </span><span class="p">[]</span><span class="w"> |
| </span><span class="p">},</span><span class="w"> |
| </span><span class="s2">"thing:/features/featureY"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"grant"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="s2">"READ"</span><span class="p">],</span><span class="w"> |
| </span><span class="s2">"revoke"</span><span class="p">:</span><span class="w"> </span><span class="p">[]</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span><span class="p">},</span><span class="w"> |
| </span><span class="s2">"private"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"subjects"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"nginx:some-users"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"type"</span><span class="p">:</span><span class="w"> </span><span class="s2">"a group of users"</span><span class="w"> |
| </span><span class="p">},</span><span class="w"> |
| </span><span class="s2">"resources"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"thing:/features/featureX/properties/location/city"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"grant"</span><span class="p">:</span><span class="w"> </span><span class="p">[],</span><span class="w"> |
| </span><span class="s2">"revoke"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="s2">"READ"</span><span class="p">]</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span></code></pre></div></div> |
| |
| <p>The Policy can be found:</p> |
| |
| <ul> |
| <li>Via GET request at <code class="highlighter-rouge">/api/2/policies/<policyId></code>, and</li> |
| <li>Via GET request at <code class="highlighter-rouge">/api/2/things/{thingId}/policyId</code></li> |
| <li>At any Thing itself in its JSON representation. |
| It is however not included by default, but can be retrieved by specifying the <code class="highlighter-rouge">/api/2/things/<thingId>?fields=_policy</code> query parameter.</li> |
| </ul> |
| |
| <div class="alert alert-success" role="alert"><i class="fa fa-check-square-o"></i> <b>Tip:</b> As soon as a sophisticated policy is described, you will only need to add a further <strong>subject</strong> entry to have for example a new group of users equally empowered as the initial one.</div> |
| |
| |
| <div class="tags"> |
| |
| <b>Tags: </b> |
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