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<a href="registeredService.html">Registered Services</a>
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<span>Basic</span>
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<a href="#">Authentication</a>
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<li><a href="./authentication.html">General Information</a></li>
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<li><a href="./personalToken.html">Personal Token</a></li>
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<h2 class="uk-text-center" id="service">Basic service authentication and registration</h2>
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<p>For the <b>Basic Authentication</b> method the OpenAIRE AAI server generates a pair of <em>Client ID</em> and <em>Client Secret</em>
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for your service upon its registration. The service uses the client id and client secret to obtain the access
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token for the OpenAIRE APIs. The OpenAIRE AAI server checks whether the client id and client secret sent is valid.
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</p>
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<h4>How to register your service</h4>
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<p>To register your service you need to:</p>
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<ol>
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<li>Login to OpenAIRE. In case you are not already a member you will need to register first.</li>
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<li>Go to your <a href="https://services.openaire.eu/uoa-user-management/registeredServices" target="_blank"> Registered Services</a> page and click the New Service button.</li>
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<li>Provide the <span class="uk-text-primary"><b>"Νame"</b></span> (mandatory) of your service.</li>
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<li>Select the Basic <span class="uk-text-primary"><b>"Security level"</b></span>.</li>
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<li>Click the <span class="uk-text-primary"><b>Add New Service</b></span> button.</li>
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</ol>
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<p>Once your service is created, the <em>Client ID</em> and <em>Client Secret</em> will appear on your screen. Click
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<span class="uk-text-primary">"OK"</span> and your new service will be appear in the list of your <a href="https://services.openaire.eu/uoa-user-management/registeredServices" target="_blank">Registered Services</a> page.</p>
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<h4>How to make a request</h4>
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<h5><span class="uk-text-bold">Step 1.</span> Request for an access token</h5>
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<p>
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To make an access token request use the <em>Client ID</em> and <em>Client Secret</em> of your service.
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<pre class="uk-text-left">
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curl -u {CLIENT_ID}:{CLIENT_SECRET} \
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-X POST 'https://aai.openaire.eu/oidc/token' \
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-d 'grant_type=client_credentials'</pre>
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<p>where <b>{CLIENT_ID}</b> and <b>{CLIENT_SECRET}</b> are the <em>Client ID</em> and <em>Client Secret</em> assigned to your service
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upon registration.
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<p>
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The response is:
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<pre class="uk-text-left">
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{
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"access_token": ...,
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"token_type": "Bearer",
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"expires_in": ...
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}</pre>
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</p>
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</p>
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<div class="uk-alert-danger" uk-alert>
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<p>Store the access token confidentially on the service side.</p>
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</div>
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<h5><span class="uk-text-bold">Step 2.</span> Make a request</h5>
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<p>To access the OpenAIRE APIs send the access token returned in <span class="uk-text-primary"><b>Step 1</b></span>.</p>
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<pre class="uk-text-left">
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GET https://api.openaire.eu/{resourceServicePath}
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Authorization: Bearer {ACCESS_TOKEN}</pre>
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<h4>Error messages</h4>
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<p>401 - Missing username or/and password</p>
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<pre class="uk-text-left">
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{
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"error": "unauthorized",
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"error_description": "Client id must not be empty!"
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}</pre>
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<p>401 - Wrong username or/and password</p>
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<pre class="uk-text-left">
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{
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"error": "unauthorized",
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"error_description": "Bad credentials"
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}</pre>
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<p>400 - Missing grant type</p>
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<pre class="uk-text-left">
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{
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"error": "invalid_request",
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"error_description": "Missing grant type"
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}</pre>
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<p>400 - Wrong grant type</p>
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<pre class="uk-text-left">
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{
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"error": "unsupported_grant_type",
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"error_description": "Unsupported grant type: ..."
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}</pre>
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