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Scripts for signing using PKCS11 library on Ant

Prerequisites

  • Ant installed on the agent

  • JDK installed on the agent

  • DigiCert​​®​​ KeyLocker credentials

  • DigiCert​​®​​ KeyLocker client tools

Client tools

DigiCert​​®​​ KeyLocker clients can be downloaded in a package.

Download client tools

  1. Sign in to DigiCert ONE.

  2. Navigate to DigiCert​​®​​ KeyLocker > Resources > Client tool repository.

  3. Select your operating system.

  4. Click the download icon next to DigiCert​​®​​ KeyLocker clients.

Create PKCS11 configuration file

To create a configuration file with the path to this shared library:

  1. Open an integrated development environment (IDE) or plain text editor.

  2. Copy and paste the following text into the editor:

  3. Save the file as pkcs11properties.cfg.

  4. Move the pkcs11properties.cfg file to the same location as the PKCS11 library.

Set PATH environment variables

Operating systems use the environment variable called PATH to determine where executable files are stored on your system. Use the PATH environment variable to store the file path to your signing tools to ensure that the CLI can reference these signing tools.

User authentication

DigiCert​​®​​ KeyLocker enforces multifactor authentication for security. To access keypairs, certificates, and sign code, you need to set up two types of credentials: an API token and an authentication certificate.

Create an API token

The API token is an authentication method used to verify you as a user and your permissionsUsers assigned in DigiCert ONE. The API token provides the first factor authentication.

Follow these steps to generate an API token:

  1. Sign in to DigiCert ONE.

  2. Select the profile icon (top-right).

  3. Select Admin Profile.

  4. Scroll down to API Tokens.

  5. Select  Create API token.

    Note

    The API token is only shown once, securely store the API key to use it later.

Create an authentication certificate

The client authentication certificate is an authentication method used to verify you as a user and your permissionsUsers assigned in DigiCert ONE. The client authentication certificate provides the second factor authentication.

Follow these steps to create a client authentication certificate:

  1. Sign in to DigiCert ONE.

  2. Select the profile icon (top-right).

  3. Select Admin Profile.

  4. Scroll down to Authentication certificates.

  5. Select Create authentication certificate.

    Note

    The client authentication certificate password shown after creating an client authentication certificate cannot be accessed again, download the certificate and securely store the password to use it later.

DigiCert​​®​​ KeyLocker environment variables

Set the following environment variables:

Variable

Description

SM_API_KEY

Provide your API token.

SM_CLIENT_CERT_FILE

Provide your client authentication certificate.

SM_CLIENT_CERT_PASSWORD

Provide your client certificate password.

SM_HOST

Provide your host environment.

PKCS11_CONFIG

Provide the path to the PKCS11 configuration file.

SM_TLS_SKIP_VERIFY

Enter true to disable or false to enable TLS verification on client side.

Secure your credentials

Your DigiCert ONE host environment, API key, client authentication certificate, and password make up your environment variables and are required to access DigiCert​​®​​ KeyLocker client tools. Use one of the methods provided below to securely store your credentials based on your operating system.

Sign

To integrate DigiCert​​®​​ KeyLocker PKCS11 with Ant, add to the build.xml file:

<project name="pkcs11ant" default="dist" basedir=".">
<description>
sample application
</description>
<!-- set global properties for this build -->
<property name="name" value="pkcs11ant"/>
<property name="src" location="src/main/java" />
<property name="build" location="ant-build" />
<property name="dist" location="${build}" />
<property name="version" value="1.0" />
<property environment="env"/>
<property name="jarfilename" value="${name}-${version}.jar" />
<property name="jarsigner" value="${env.JAVA_HOME}/bin/jarsigner.exe" />
<target name="init">
<!-- Create the time stamp -->
<tstamp />
<!-- Create the build directory structure used by compile -->
<mkdir dir="${build}" />
</target>
<target name="compile" depends="init" description="compile the source">
<!-- Compile the java code from ${src} into ${build} -->
<javac srcdir="${src}" destdir="${build}" />
</target>
<target name="dist" depends="compile" description="generate the distribution">
<buildnumber />
<!-- Create the distribution directory -->
<mkdir dir="${dist}/lib" />
<!-- Put everything in ${build} into the MyApplication-${version}.${build.number}.jar -->
<jar destfile="${dist}/lib/${jarfilename}" basedir="${build}" />
</target>
<target name="sign" depends="dist" description="sign the jar using jarsigner">
<exec executable="${jarsigner}">
<arg line="-providerArg = <path of smpkcs11.config> -keystore NONE -storetype PKCS11 -storepass NONE  -providerClass sun.security.pkcs11.SunPKCS11 ${dist}/lib/${jarfilename} <keyPairAlias>,${jarfilename}" />
</exec>
</target>
<target name="clean" description="clean up">
<!-- Delete the ${build} and ${dist} directory trees -->
<delete dir="${build}" />
<delete dir="${dist}" />
</target>
</project>

Verify signature

An example of an Ant setup that verifies a signed jar:

<property name="jarsigner" value="${env.JAVA_HOME}/bin/jarsigner.exe" />    
target name="dist" depends="compile" description="generate the distribution">
<buildnumber />
<!-- Create the distribution directory -->
<mkdir dir="${dist}/lib" />
<!-- Put everything in ${build} into the MyApplication-${version}.${build.number}.jar -->
<jar destfile="${dist}/lib/${jarfilename}" basedir="${build}" />
</target>

<target name="verify" depends="dist" description="verify the jar using jarsigner">
<exec executable="${jarsigner}">
<arg line="-verify ${dist}/lib/${jarfilename}" />
</exec>
</target>

Tip

The only input is the path to the signed jar that needs to be verified.

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Troubleshooting

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