test/jdk/java/security/SignedJar/SignedJarWithCustomClassLoader.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/**
 * @test
 * @bug 8280890
 * @library /test/lib
 * @build SignedJarWithCustomClassLoader CustomClassLoader
 * @run main/othervm SignedJarWithCustomClassLoader
 * @summary Make sure java.system.class.loader property can be used when custom
 *     class loader is inside signed jar
 */

import java.nio.file.Path;
import java.nio.file.Paths;

import jdk.test.lib.SecurityTools;
import jdk.test.lib.compiler.InMemoryJavaCompiler;
import jdk.test.lib.helpers.ClassFileInstaller;
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.util.JarUtils;

public class SignedJarWithCustomClassLoader {

    public static void main(String[] args) throws Exception {

        // compile the Main program
        String main = """
                      public class Main {
                          public static void main(String[] args) {}
                      }
                      """;
        String testClasses = System.getProperty("test.classes", "");
        ClassFileInstaller.writeClassToDisk("Main",
             InMemoryJavaCompiler.compile("Main", main),
             testClasses);

        // create the jar file
        Path classes = Paths.get(testClasses);
        JarUtils.createJarFile(Paths.get("test.jar"), classes,
            classes.resolve("CustomClassLoader.class"),
            classes.resolve("Main.class"));

        // create signer's keypair
        SecurityTools.keytool("-genkeypair -keyalg RSA -keystore ks " +
                              "-storepass changeit -dname CN=test -alias test")
                     .shouldHaveExitValue(0);

        // sign jar
        SecurityTools.jarsigner("-keystore ks -storepass changeit " +
                                "-signedjar signed.jar test.jar test")
                     .shouldHaveExitValue(0);

        // run app with system class loader set to custom classloader
        ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(
            "-cp", "signed.jar",
            "-Djava.system.class.loader=CustomClassLoader", "Main");
        ProcessTools.executeProcess(pb)
                    .shouldHaveExitValue(0);

        // sign jar again, but this time with SHA-1 which is disabled
        SecurityTools.jarsigner("-keystore ks -storepass changeit " +
                                "-digestalg SHA-1 -sigalg SHA1withRSA " +
                                "-signedjar signed.jar test.jar test")
                     .shouldHaveExitValue(0);

        // run app again, should still succeed even though SHA-1 is disabled
        pb = ProcessTools.createLimitedTestJavaProcessBuilder(
            "-cp", "signed.jar",
            "-Djava.system.class.loader=CustomClassLoader", "Main");
        ProcessTools.executeProcess(pb)
                    .shouldHaveExitValue(0);
    }
}