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DocAssurance Service for encrypting PDF

Forum|Forum|4 years ago
October 5, 2021
1 reply
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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

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Best answer by workflowuser

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

W

workflowuser

Accepted solution

Adobe Employee

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

W

workflowuser

Adobe Employee

This article should also help you in certifying documents

A

Ashar97Author

Level 2

And does this work?

if not send me the Pom.xml

Hello Girish,
Here are the pom files.

core>pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
 |  Copyright 2017 Adobe Systems Incorporated
 |
 |  Licensed under the Apache License, Version 2.0 (the "License");
 |  you may not use this file except in compliance with the License.
 |  You may obtain a copy of the License at
 |
 |      http://www.apache.org/licenses/LICENSE-2.0
 |
 |  Unless required by applicable law or agreed to in writing, software
 |  distributed under the License is distributed on an "AS IS" BASIS,
 |  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 |  See the License for the specific language governing permissions and
 |  limitations under the License.
-->
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>com.ashforms</groupId>
        <artifactId>ashforms</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <relativePath>../pom.xml</relativePath>
    </parent>
    <artifactId>ashforms.core</artifactId>
    <name>ash Forms - Core</name>
    <description>Core bundle for ash Forms</description>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.sling</groupId>
                <artifactId>sling-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>biz.aQute.bnd</groupId>
                <artifactId>bnd-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <id>bnd-process</id>
                        <goals>
                            <goal>bnd-process</goal>
                        </goals>
                        <configuration>
                            <bnd><![CDATA[
Import-Package: javax.annotation;version=0.0.0,*
                                ]]></bnd>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>biz.aQute.bnd</groupId>
                <artifactId>bnd-baseline-maven-plugin</artifactId>
                <configuration>
                    <failOnMissing>false</failOnMissing>
                </configuration>
                <executions>
                    <execution>
                        <id>baseline</id>
                        <goals>
                            <goal>baseline</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <configuration>
                    <archive>
                        <manifestFile>${project.build.outputDirectory}/META-INF/MANIFEST.MF</manifestFile>
                    </archive>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <dependencies>
        <dependency>
            <groupId>uk.org.lidalia</groupId>
            <artifactId>slf4j-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!-- OSGi Dependencies -->
        <dependency>
            <groupId>org.osgi</groupId>
            <artifactId>org.osgi.annotation.versioning</artifactId>
        </dependency>
        <dependency>
            <groupId>org.osgi</groupId>
            <artifactId>org.osgi.annotation.bundle</artifactId>
        </dependency>
        <dependency>
            <groupId>org.osgi</groupId>
            <artifactId>org.osgi.service.metatype.annotations</artifactId>
        </dependency>
        <dependency>
            <groupId>org.osgi</groupId>
            <artifactId>org.osgi.service.component.annotations</artifactId>
        </dependency>
        <dependency>
            <groupId>org.osgi</groupId>
            <artifactId>org.osgi.service.component</artifactId>
        </dependency>
        <dependency>
            <groupId>org.osgi</groupId>
            <artifactId>org.osgi.service.cm</artifactId>
        </dependency>
        <dependency>
            <groupId>org.osgi</groupId>
            <artifactId>org.osgi.service.event</artifactId>
        </dependency>
        <dependency>
            <groupId>org.osgi</groupId>
            <artifactId>org.osgi.service.log</artifactId>
        </dependency>
        <dependency>
            <groupId>org.osgi</groupId>
            <artifactId>org.osgi.framework</artifactId>
        </dependency>
        <dependency>
            <groupId>org.osgi</groupId>
            <artifactId>org.osgi.resource</artifactId>
        </dependency>
        <dependency>
            <groupId>org.osgi</groupId>
            <artifactId>org.osgi.util.tracker</artifactId>
        </dependency>





        <!-- AEM Forms -->
        <dependency>
            <groupId>org.apache.pdfbox</groupId>
            <artifactId>pdfbox</artifactId>
            <version>2.0.21</version>
        </dependency>


        <dependency>
            <groupId>com.adobe.aemfd</groupId>
            <artifactId>aemfd-client-sdk</artifactId>
            <version>6.3.0</version>
        </dependency>
       
        <!-- Other Dependencies -->

        <dependency>
            <groupId>com.day.cq</groupId>
            <artifactId>serviceuser</artifactId>
            <version>1.0</version>
            <type>bundle</type>
            <scope>system</scope>
            <systemPath>/Users/asharazmat/Documents/Projects/ash/ash-AEM/mylibs/DevelopingWithServiceUser.jar</systemPath>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
        </dependency>
        <dependency>
            <groupId>javax.jcr</groupId>
            <artifactId>jcr</artifactId>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
        </dependency>
        <dependency>
            <groupId>javax.annotation</groupId>
            <artifactId>javax.annotation-api</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.sling</groupId>
            <artifactId>org.apache.sling.servlets.annotations</artifactId>
        </dependency>
        <dependency>
            <groupId>com.adobe.aem</groupId>
            <artifactId>uber-jar</artifactId>
            <classifier>apis</classifier>
        </dependency>
        <dependency>
            <groupId>com.adobe.cq</groupId>
            <artifactId>core.wcm.components.core</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.sling</groupId>
            <artifactId>org.apache.sling.models.api</artifactId>
        </dependency>

        <!-- Testing -->
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.mockito</groupId>
            <artifactId>mockito-core</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.mockito</groupId>
            <artifactId>mockito-junit-jupiter</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>junit-addons</groupId>
            <artifactId>junit-addons</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>io.wcm</groupId>
            <artifactId>io.wcm.testing.aem-mock.junit5</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.apache.sling</groupId>
                    <artifactId>org.apache.sling.models.impl</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-simple</artifactId>
                </exclusion>
            </exclusions>
            <scope>test</scope>
        </dependency>
        <!-- Required to be able to support injection with @Self and @Via -->
        <dependency>
            <groupId>org.apache.sling</groupId>
            <artifactId>org.apache.sling.models.impl</artifactId>
            <version>1.4.4</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

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