Sign Java files with Jarsigner using PKCS11 library

Jarsigner is a command-line tool provided as part of the Java Development Kit (JDK). It is used to digitally sign Java Archive (JAR) files and other related artifacts.

Follow these instructions to sign directly using Jarsigner and securely reference your private key stored in DigiCert® KeyLocker. Alternatively, integrate Jarsigner with Signing Manager Controller (SMCTL) for simplified signing.

Prerequisites

Compatible with Windows, Linux, and macOS
Download and configure DigiCert® KeyLocker clients
Install JDK or OpenJDK (compatible with version 8-17)
Configure PKCS11 library
Configure your credentials
Keypair alias
Unsigned jar file

What files can Jarsigner sign using the PKCS11 library?

.jar
.ear
.sar
.war

Jarsigner commands for PKCS11

The examples shown for the commands below use Java JDK 8, however DigiCert® KeyLocker supports JDK versions 8-17.

注意

The parameters may vary depending on which JDK version is installed.

To list jarsigner parameters, run:

jarsigner

Sign

To sign, run:

jarsigner -keystore NONE -storepass NONE -storetype PKCS11 -sigalg SHA256withRSA -providerClass sun.security.pkcs11.SunPKCS11 -providerArg <path to pkcs11properties.cfg> -signedjar <path to signed file output> <unsigned file path> <keypair alias> -tsa http://timestamp.digicert.com

Sample command:

jarsigner -keystore NONE -storepass NONE -storetype PKCS11 -sigalg SHA256withRSA -providerClass sun.security.pkcs11.SunPKCS11 -providerArg pkcs11properties2.cfg -signedjar C:\\Users\\Name\\Desktop\\signed\\signedjar.jar C:\\Users\\Name\\Desktop\ToSign\\jartosign.jar key3 -tsa "http://timestamp.digicert.com"

Verify signature

To verify if a file is signed, run:

jarsigner -verify "<path to signed jar file>" -certs -verbose

注意

To return more details, include -certs -verbose as an optional parameters.