For MSPs — Generate an access token for your Knox MSP Program tenant

Complete these steps to generate your access token using the Knox Cloud Authentication API and successfully call the Knox cloud service APIs in the course of your MSP activities.

1. Get access to Knox Cloud API:

   1. Register for a Knox Partner Program account as a Managed Service Provider.

   2. Contact your local Samsung representative or the Knox team through one of the following channels to request access:

      • On the Knox Partner Program dashboard, click Support and submit the web form.
      • On the Knox Developers dashboard, click Support > Technical Support.

2. Generate your key pair on the Knox API Portal:

   1. On the Knox Developer Portal, click Knox Cloud API Portal.

   2. Click Download to download your public and private key pair JSON file. This JSON file only needs to be generated once and contains the following information:

      Key	Description
      Public key	Key that’s sent in the body of the accesstoken REST API request and stored by Samsung Knox to validate signed requests.
      Private key	Key that should be stored and never revealed. This key is used for signing the Client Identifier and the access token returned by the REST API call. This key isn’t stored by Samsung Knox and we’ll never request it from you.

3. Click GENERATE CLIENT IDENTIFIER under Knox MSP API. This unique identifier only needs to be generated once unless:

   • Privileges need to be changed.
   • The Client Identifier is lost or stolen.

   In both cases, re-generating the Client Identifier invalidates the previous one.

   

4. Get the support files.

   • Java
   • JavaScript
   • .NET

   This solution is designed for a Java environment (v1.6 and above). Download the JAR and README files. Download JAR

   $ npm install knox-token-library-js
   

   Get the NuGet package. Download nupkg

5. Sign your Client Identifier with the token utility. See the source code below on how to sign your Client Identifier. For more information on using this utility JAR, see the included README file in the JAR file download package.

   • Java
   • JavaScript
   • .NET

   String clientId = "myClientId";
   String cert = "src/test/resources/keys.json";
   String signedClientId = KnoxTokenUtility.generateSignedClientIdentifierJWT(new FileInputStream(cert), clientId);
   

   const knoxTokenLibraryJs = require('knox-token-library-js');
   var clientId = "<insert-Client-Identifier-Step-3>";
   var signedClientId = knoxTokenLibraryJs.generateSignedClientIdentifierJWT("keys.json", clientId );
   

   using knoxAPIUtility;
   var cert = "<insert path to keys.json>";
   var clientId = "<insert-Client-Identifier-Step-3>";
   var signedClientId = KnoxTokenUtility.generateSignedClientIdentifierJWT(cert, clientId );
   

6. Generate your access token by calling the accesstoken REST API with your signed clientId and public key. The signed Client Identifier should be set as the value to clientIdentifierJwt in the request body of the accesstoken REST API. You can also set the token valid time between 1 — 30 minutes. The valid time is set to 30 minutes by default.

   For example:

   • CURL

   curl -X POST <Knox-AccessToken-Endpoint> -H 'Content-Type: application/json' -d '{"clientIdentifierJwt": "signedClientId","base64EncodedStringPublicKey": "myPublicKey"}'
   

7. Sign your accesstoken with your private key, using the utility JAR file as seen below.

   • Java
   • JavaScript
   • .NET

   String accessToken = "myAccessToken";
   String signedAccessToken = KnoxTokenUtility.generateSignedAccessTokenJWT(new FileInputStream(cert), accessToken);
   

   var accessToken  = "<insert-access-token>"
   var signedAccessToken = knoxTokenLibraryJs.generateSignedAccessTokenJWT("keys.json", accessToken );
   

   var accessToken  = "<insert-access-token>"
   var signedAccessToken =KnoxTokenUtility.generateSignedAccessTokenJWT(cert, accessToken );
   

   The signed accesstoken expires after its valid time runs out. Once that happens it returns the 403225 error code.

8. Enter your access token in the x-knox-apitoken header parameter of your Knox cloud service API request. See the API reference of your Knox cloud service for details. When you call a Knox cloud service API on behalf of your managed customers, you must include the x-wsm-managed-tenantid header parameter in your request, which identifies which customer you are managing with the API. Use your managed customer’s ID as its value, which is found on the Customers page on the Knox MSP Portal.

Here is an example of how to detect when the access token expires, get a fresh access token, and call a Knox Cloud Service API again.

• Java

// Expired access token error code
static String ACCESS_TOKEN_EXPIRED = "4032251";
try {
    // Call Knox cloud service API
    callKnoxCloudService(signedAccessToken);
} catch (Exception exception) {
    String responseBodyAsString = ((HttpClientErrorException) exception).getResponseBodyAsString();
    // Get error code value
    JsonNode code = new ObjectMapper().readTree(responseBodyAsString).get("code");
    // If error code matches expired access token error code, generate another token
    if (code.asText().equalsIgnoreCase(ACCESS_TOKEN_EXPIRED)) {
        // Generate a new access token by calling accesstoken API (Step 6)
        accessToken = getAccessToken(signedClientId, publicKey);
        // Sign your new access token (Step 7)
        signedAccessToken = KnoxTokenUtility.generateSignedAccessTokenJWT(new FileInputStream(<insert path to keys.json>), accessToken)
    }
}