Steps taken to setup this project.

1. I added the maven-wrapper so you don't need to worry about fiddling much with Maven. Just use ./mvnw where you'd normally use mvn.

2. For reference only: DO NOTE EXECUTE THIS STEP: The test Java application source code was generated using the Maven Archetype - Simple.

   mvn archetype:generate -DarchetypeGroupId=org.apache.maven.archetypes -DarchetypeArtifactId=maven-archetype-simple

3. You will find your choice of JDK "matters(tm)". JDK 8 and JDK 17 had no joy. I had more success with JDK 11. I used sdkman to run with JDK 11 like so:

   sdk use java 11.0.17-zulu  

   Verify your jdk version via:

   java -version  

   Command Output

   $ java -version
    openjdk version "11.0.17" 2022-10-18 LTS
    OpenJDK Runtime Environment Zulu11.60+19-CA (build 11.0.17+8-LTS)
    OpenJDK 64-Bit Server VM Zulu11.60+19-CA (build 11.0.17+8-LTS, mixed mode)

4. The CodeSignTool was downloaded via Linux and macOS from eSigner CodeSignTool Command Guide. The zip file contents where extracted to CodeSignTool-v1.3.0.

5. The file: CodeSignTool-v1.3.0/conf/code_sign_tool.properties has been edited as per eSigner Demo Credentials and Certificates.

   NOTE: Be sure you setup a One Time Password according to Demo QR Codes and TOTP Secrets in the article because you will need to enter the One Time Password when you sign the jar.

   Automate eSigner EV Code Signing shows how to automate this OTP process for CI.

6. Build the application jar to be signed using:

   cd cool-app/
   ./mvnw clean package

   Command Output

   $ cd cool-app/
   $ .$ ./mvnw clean package
   [INFO] Scanning for projects...
   [INFO]
   [INFO] -----------------------< com.sonatype:cool-app >------------------------
   [INFO] Building cool-app 1.0-SNAPSHOT
   [INFO]   from pom.xml
   [INFO] --------------------------------[ jar ]---------------------------------
   [INFO]
   [INFO] --- clean:3.1.0:clean (default-clean) @ cool-app ---
   [INFO]
   [INFO] --- resources:3.0.2:resources (default-resources) @ cool-app ---
   [INFO] Using 'UTF-8' encoding to copy filtered resources.
   [INFO] skip non existing resourceDirectory /Users/bhamail/sonatype/sasq/CodeSigningSSLTest/cool-app/src/main/resources
   [INFO]
   [INFO] --- compiler:3.8.0:compile (default-compile) @ cool-app ---
   [INFO] Changes detected - recompiling the module!
   [INFO] Compiling 1 source file to /Users/bhamail/sonatype/sasq/CodeSigningSSLTest/cool-app/target/classes
   [INFO]
   [INFO] --- resources:3.0.2:testResources (default-testResources) @ cool-app ---
   [INFO] Using 'UTF-8' encoding to copy filtered resources.
   [INFO] skip non existing resourceDirectory /Users/bhamail/sonatype/sasq/CodeSigningSSLTest/cool-app/src/test/resources
   [INFO]
   [INFO] --- compiler:3.8.0:testCompile (default-testCompile) @ cool-app ---
   [INFO] Changes detected - recompiling the module!
   [INFO] Compiling 1 source file to /Users/bhamail/sonatype/sasq/CodeSigningSSLTest/cool-app/target/test-classes
   [INFO]
   [INFO] --- surefire:2.22.1:test (default-test) @ cool-app ---
   [INFO]
   [INFO] -------------------------------------------------------
   [INFO]  T E S T S
   [INFO] -------------------------------------------------------
   [INFO] Running com.sonatype.AppTest
   [INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.005 s - in com.sonatype.AppTest
   [INFO]
   [INFO] Results:
   [INFO]
   [INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
   [INFO]
   [INFO]
   [INFO] --- jar:3.0.2:jar (default-jar) @ cool-app ---
   [INFO] Building jar: /Users/bhamail/sonatype/sasq/CodeSigningSSLTest/cool-app/target/cool-app-1.0-SNAPSHOT.jar
   [INFO] ------------------------------------------------------------------------
   [INFO] BUILD SUCCESS
   [INFO] ------------------------------------------------------------------------
   [INFO] Total time:  1.974 s
   [INFO] Finished at: 2024-02-28T11:40:56-05:00
   [INFO] ------------------------------------------------------------------------

7. Sign the jar you just built using the following:

   Change to the tool directory:

   cd ..
   cd CodeSignTool-v1.3.0
   ./CodeSignTool.sh sign -credential_id=8b072e22-7685-4771-b5c6-48e46614915f -username=esigner_demo -password="esignerDemo#1" -input_file_path=../cool-app/target/cool-app-1.0-SNAPSHOT.jar -output_dir_path=../signed/ 

   Run the signing tool. You will be prompted to enter the OTP.

   ./CodeSignTool.sh sign -credential_id=8b072e22-7685-4771-b5c6-48e46614915f -username=esigner_demo -password="esignerDemo#1" -input_file_path=../cool-app/target/cool-app-1.0-SNAPSHOT.jar -output_dir_path=../signed/ 

   Command Output

   $ ./CodeSignTool.sh sign -credential_id=8b072e22-7685-4771-b5c6-48e46614915f -username=esigner_demo -password="esignerDemo#1" -input_file_path=../cool-app/target/cool-app-1.0-SNAPSHOT.jar -output_dir_path=../signed/
   Enter the OTP - Press enter to continue: 207138
   Code signed successfully: /Users/bhamail/sonatype/sasq/CodeSigningSSLTest/CodeSignTool-v1.3.0/../signed/cool-app-1.0-SNAPSHOT.jar

   The signed jar will be in the signed directory.

8. Verify the signed jar using jarsigner (part of the jdk):

   cd ..
   jarsigner -verify signed/cool-app-1.0-SNAPSHOT.jar

   Command Output

   $ jarsigner -verify signed/cool-app-1.0-SNAPSHOT.jar
   jar verified.
   
   Warning:
   This jar contains entries whose certificate chain is invalid. Reason: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
   
   Re-run with the -verbose and -certs options for more details.