build.xml

<project xmlns:ivy="antlib:org.apache.ivy.ant" name="mobi">

  <property name="tmpdir" value="${java.io.tmpdir}/${user.name}/${ant.project.name}" />
  <target name="import-certificates">
    <mkdir dir="${tmpdir}"/>

    <delete file="conf/keystore.jks"/>
    <exec executable="openssl" inputstring="" output="${tmpdir}/openxades.cert">
      <arg line="s_client -showcerts -connect www.openxades.org:8443"/>
    </exec>
    <exec executable="openssl" inputstring="">
      <arg line="x509 -outform der -in ${tmpdir}/openxades.cert -out ${tmpdir}/openxades.der"/>
    </exec>
    <!--<exec executable="keytool" inputstring="">
      <arg line="-delete -alias openxades -keystore keystore.jks -storepass changeit"/>
    </exec>-->
    <exec executable="keytool" inputstring="yes">
      <arg line="-importcert -alias openxades -file ${tmpdir}/openxades.der -keystore conf/keystore.jks -trustcacerts -storepass changeit"/>
    </exec>

    <delete dir="${tmpdir}"/>
  </target>

</project>