DocAssurance Service for encrypting PDF

Question

Hello team, I am trying to utilize the DocAssuranceService to encrypt PDFs. I have created a class using the Sample 1 under the Securing Documents section here:https://experienceleague.adobe.com/docs/experience-manager-64/forms/use-document-services/aem-document-services-programmatically.html?lang=en#securing-documents Additionally, I have a servlet identical to the below link, which calls the above class in order to retrieve a certified PDF.https://experienceleague.adobe.com/docs/experience-manager-learn/forms/creating-your-first-osgi-bundle/create-servlet.html?lang=en I have put a snippet of the class I have created to use the DocAssurance.   public class PassEncryptCertifyExtend {

@3214626
 private DocAssuranceService docAssuranceService;
 
 @3214626
    private SlingRepository slingRepository;
 
 @3214626
    private ResourceResolverFactory jcrResourceResolverFactory ;

/**
  * 
  * @90521 inputFile - path to the pdf document stored at disk 
  * @90521 outputFile - path to the pdf document where the output needs to be stored
  * @throws Exception 
  */
    Document outDoc;
    Logger logger = Logger.getLogger("classname");

public Document SecureDocument(Document inDoc) throws Exception{

try {

logger.info("***** CALLING ENCRYPTION OPTIONS *****");
            outDoc = null;
            outDoc = docAssuranceService.secureDocument(inDoc, getPassEncryptionOptions(), null, null, null);
            logger.info("***** EXITING ENCRYPTION OPTIONS *****");
    } catch(Exception e) {
        logger.error(e);
    }
return outDoc;
}    outDoc = docAssuranceService.secureDocument(inDoc, getPassEncryptionOptions(), null, null, null); This line is providing a nullpointer exception when run. I can verify that the inDoc being passed is without any issues. In addition, thegetPassEncryptionOptions() method is being run successfully. I have tried various options such as just passing inDoc with other parameters as null, passing in with all other parameters, yet all variations return a nullPointer exception. The logger indicating the exit of the docAssuranceService.secureDocument does not run and the code returns back to the servlet. I was wondering if I could receive any guidance in this regard. Error:05.10.2021 15:30:09.987 *INFO* [0:0:0:0:0:0:0:1 [1633462209985] POST /bin/mergedataWithAcroform HTTP/1.1] classname ***** CALLING ENCRYPTION OPTIONS *****05.10.2021 15:30:10.007 *ERROR* [0:0:0:0:0:0:0:1 [1633462209985] POST /bin/mergedataWithAcroform HTTP/1.1] classname java.lang.NullPointerException

workflowuser · Accepted Answer

public InputStream certifyDocument(com.adobe.aemfd.docmanager.Document documentToCertify, String credentialAlias,
String fieldName) {
this.credentialAlias = credentialAlias;
this.fieldName = fieldName;
ResourceResolver resourceResolver = null;
com.adobe.aemfd.docmanager.Document certifiedDocument = null;

try {

try {
resourceResolver = getResolver.getFormsServiceResolver();

certifiedDocument = docAssuranceService.secureDocument(documentToCertify, null,
getCertificationOptions(resourceResolver), null, null);
log.info("Certified the document");
System.out.println("Certified document");
certifiedDocument.copyToFile(new File("c:\\scrap\\abc.pdf"));
} catch (Exception e) {
e.printStackTrace();
}

} finally {

try {
return certifiedDocument.getInputStream();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return null;
}

you can get the sample resolver from this link. You will have to deploy the bundle and add the user mapper settings as shown in the document

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