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(PHP Extension) OAuth2 Token using IdentityServer4 with Client CredentialsDemonstrates how to get an OAuth2 access token using the client credential flow with IdentityServer4.
<?php // The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number. // For example, if using Chilkat v9.5.0.48, then include as shown here: include("chilkat_9_5_0.php"); // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. $http = new CkHttp(); // The first step is to fetch your IdentityServer4's discovery document // (OpenID Connect defines a discovery mechanism, called OpenID Connect Discovery, where an OpenID server publishes its metadata at a well-known URL, // typically https://server.com/.well-known/openid-configuration // resp is a CkHttpResponse $resp = $http->QuickRequest('GET','https://localhost:5000/.well-known/openid-configuration'); if ($http->get_LastMethodSuccess() != true) { print $http->lastErrorText() . "\n"; exit; } if ($resp->get_StatusCode() != 200) { print 'Received response status code ' . $resp->get_StatusCode() . "\n"; print 'Response body containing error text or JSON:' . "\n"; print $resp->bodyStr() . "\n"; exit; } $json = new CkJsonObject(); $success = $json->Load($resp->bodyStr()); // We have the discovery document, which contains something like this: // You can use this online tool to generate parsing code from sample JSON: // Generate Parsing Code from JSON // { // "issuer": "https://localhost:5000", // "jwks_uri": "https://localhost:5000/.well-known/openid-configuration/jwks", // "authorization_endpoint": "https://localhost:5000/connect/authorize", // "token_endpoint": "https://localhost:5000/connect/token", // "userinfo_endpoint": "https://localhost:5000/connect/userinfo", // "end_session_endpoint": "https://localhost:5000/connect/endsession", // "check_session_iframe": "https://localhost:5000/connect/checksession", // "revocation_endpoint": "https://localhost:5000/connect/revocation", // "introspection_endpoint": "https://localhost:5000/connect/introspect", // "frontchannel_logout_supported": true, // "frontchannel_logout_session_supported": true, // "backchannel_logout_supported": true, // "backchannel_logout_session_supported": true, // "scopes_supported": [ // "openid", // "profile", // "email", // "MyCompany.profile", // "MyCompany.Identity.WebApi", // "MyCompany.TriHub.WebApi", // "offline_access" // ], // "claims_supported": [ // "sub", // "updated_at", // "locale", // "zoneinfo", // "birthdate", // "gender", // "website", // "profile", // "preferred_username", // "nickname", // "middle_name", // "given_name", // "family_name", // "name", // "picture", // "email_verified", // "email", // "userId", // "groups", // "fullname" // ], // "grant_types_supported": [ // "authorization_code", // "client_credentials", // "refresh_token", // "implicit", // "password" // ], // "response_types_supported": [ // "code", // "token", // "id_token", // "id_token token", // "code id_token", // "code token", // "code id_token token" // ], // "response_modes_supported": [ // "form_post", // "query", // "fragment" // ], // "token_endpoint_auth_methods_supported": [ // "client_secret_basic", // "client_secret_post" // ], // "subject_types_supported": [ // "public" // ], // "id_token_signing_alg_values_supported": [ // "RS256" // ], // "code_challenge_methods_supported": [ // "plain", // "S256" // ] // } // // The next steps are to (1) get the token_endpoint, // and (2) verify that the client_credentials grant type is supported. $tokenEndpoint = $json->stringOf('token_endpoint'); // grantTypes is a CkJsonArray $grantTypes = $json->ArrayOf('grant_types_supported'); $clientCredentialsIdx = $grantTypes->FindString('client_credentials',true); // If clientCredentialsIdx is less then zero (-1) then the "client_credentials" string was not found. if ($clientCredentialsIdx < 0) { print 'The client credentials grant type is not supported.' . "\n"; exit; } // Request the access token using our Client ID and Client Secret. // We're going to duplicate this CURL statement: // curl --request POST \ // --url '<tokenEndpoint>' \ // --header 'content-type: application/x-www-form-urlencoded' \ // --data 'grant_type=client_credentials&client_id=CLIENT_ID&client_secret=CLIENT_SECRET' $req = new CkHttpRequest(); $req->put_HttpVerb('POST'); $req->AddParam('grant_type','client_credentials'); $req->AddParam('client_id','CLIENT_ID'); $req->AddParam('client_secret','CLIENT_SECRET'); // resp is a CkHttpResponse $resp = $http->PostUrlEncoded($tokenEndpoint,$req); if ($http->get_LastMethodSuccess() == false) { print $http->lastErrorText() . "\n"; exit; } // Make sure we got a 200 response status code, otherwise it's an error. if ($resp->get_StatusCode() != 200) { print 'POST to token endpoint failed.' . "\n"; print 'Received response status code ' . $resp->get_StatusCode() . "\n"; print 'Response body containing error text or JSON:' . "\n"; print $resp->bodyStr() . "\n"; exit; } $success = $json->Load($resp->bodyStr()); // Our JSON response should contain this: // { // "access_token":"eyJz93a...k4laUWw", // "token_type":"Bearer", // "expires_in":86400 // } // Get the access token: $accessToken = $json->stringOf('access_token'); // The access token is what gets added to "Authorization: Bearer <access_token>" // for the subsequent REST API calls.. ?> |
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