/*
 * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 */

import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;
import java.security.Security;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Arrays;
import java.util.stream.Stream;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.module.ModuleDescriptor;
import java.lang.module.ModuleDescriptor.Builder;
import jdk.internal.module.ModuleInfoWriter;
import jdk.test.lib.process.ProcessTools;


/*
 * @test
 * @bug 8130360 8183310
 * @summary Test security provider in different combination of modular option
 *          defined with(out) service description.
 * @library /lib/testlibrary /test/lib
 * @modules java.base/jdk.internal.module
 * @build JarUtils TestProvider TestClient
 * @run main SecurityProviderModularTest CL true
 * @run main SecurityProviderModularTest CL false
 * @run main SecurityProviderModularTest SL true
 * @run main SecurityProviderModularTest SL false
 * @run main SecurityProviderModularTest SPN true
 * @run main SecurityProviderModularTest SPN false
 * @run main SecurityProviderModularTest SPT true
 * @run main SecurityProviderModularTest SPT false
 */
public class SecurityProviderModularTest {

    private static final Path TEST_CLASSES
            = Paths.get(System.getProperty("test.classes"));
    private static final Path ARTIFACT_DIR = Paths.get("jars");
    private static final Path SEC_FILE = Paths.get("java.extn.security");
    private static final String PS = File.pathSeparator;
    private static final String P_TYPE = "p.TestProvider";
    private static final String C_TYPE = "c.TestClient";

    /**
     * Here is the naming convention followed.
     * Test runtime arguments,
     * CL       - Provider class loaded through ClassLoader
     * SL       - Provider class to be discovered by ServiceLoader
     * SPN      - Provider name defined through "java.extn.security" file which
     *            referred through system property "java.security.properties".
     * SPT      - Provider type defined through "java.extn.security" file which
     *            referred through system property "java.security.properties".
     *
     * For each jar file name,
     * p.jar    - Unnamed provider jar.
     * pd.jar   - Unnamed provider jar with META-INF provider descriptor.
     * mp.jar   - Modular provider jar.
     * mpd.jar  - Modular provider jar with META-INF provider descriptor.
     * msp.jar  - Modular provider jar provides service through module-info.java
     * mspd.jar - Modular provider jar with META-INF provider descriptor and
     *            provides service through module-info.java.
     * c.jar    - Unnamed client jar.
     * mc.jar   - Modular client jar.
     * mcs.jar  - Modular client jar uses service through module-info.java.
     * amc.jar  - Modular client used for automatic provider jar.
     * amcs.jar - Modular client used for automatic provider jar uses service
     *            through module-info.java.
     */
    private static final Path P_JAR = artifact("p.jar");
    private static final Path PD_JAR = artifact("pd.jar");
    private static final Path MP_JAR = artifact("mp.jar");
    private static final Path MPD_JAR = artifact("mpd.jar");
    private static final Path MSP_JAR = artifact("msp.jar");
    private static final Path MSPD_JAR = artifact("mspd.jar");
    private static final Path C_JAR = artifact("c.jar");
    private static final Path MC_JAR = artifact("mc.jar");
    private static final Path MCS_JAR = artifact("mcs.jar");
    private static final Path AMC_JAR = artifact("amc.jar");
    private static final Path AMCS_JAR = artifact("amcs.jar");
    private static final Map<String, String> MSG_MAP = new HashMap<>();

    static {
        /*
         * This mapping help process finding expected message based
         * on the key passed as argument while executing java command.
         */
        MSG_MAP.put("NoAccess", "cannot access class p.TestProvider");
        MSG_MAP.put("Success", "Client: found provider TestProvider");
        MSG_MAP.put("NoProvider", "Provider TestProvider not found");
    }

    private final String addUNArg;
    private final String addNMArg;
    private final String cArg;
    private final String unnP;
    private final String modP;
    private final String unnC;
    private final String modC;
    private final String autoMC;
    private final String expModRes;
    private final String expAModRes;
    // Common set of VM arguments used in all test cases
    private final List<String> commonArgs;

    public SecurityProviderModularTest(String use, boolean metaDesc) {

        List<String> argList = new LinkedList<>();
        argList.add("-Duser.language=en");
        argList.add("-Duser.region=US");
        final boolean useSL = "SL".equals(use) || "SPN".equals(use);
        final boolean useCL = "CL".equals(use);
        final boolean useSPT = "SPT".equals(use);
        final boolean useSP = use.startsWith("SP");
        /* Use Security property file when the provider expected to
         * loaded through Security property file. */
        if (useSP) {
            /* Create a java.security file to specify the new provider.
             * java.security file extension can be provided using
             * "-Djava.security.properties" VM argument at runtime.*/
            createJavaSecurityFileExtn("SPN".equals(use));
            argList.add("-Djava.security.properties=" + toAbsPath(SEC_FILE));
        }
        commonArgs = Collections.unmodifiableList(argList);
        cArg = (useCL) ? P_TYPE : "TestProvider";
        addUNArg = (useSL) ? "" : ("--add-modules="
                + ((metaDesc) ? "pd" : "p"));
        addNMArg = (useSL) ? "" : "--add-modules=mp";

        // Based on Testcase, select unnamed/modular jar files to use.
        unnP = toAbsPath((metaDesc) ? PD_JAR : P_JAR);
        modP = toAbsPath(useSL ? (metaDesc ? MSPD_JAR : MSP_JAR)
                : (metaDesc ? MPD_JAR : MP_JAR));
        unnC = toAbsPath(C_JAR);
        modC = toAbsPath(useSL ? MCS_JAR : MC_JAR);
        autoMC = toAbsPath(useSL ? AMCS_JAR : AMC_JAR);

        expModRes = "Success";
        expAModRes = (useSPT | useCL) ? "Success"
                : (metaDesc) ? "Success" : "NoProvider";
        String loadByMsg = useSP ? "SecurityPropertyFile"
                : ((useCL) ? "ClassLoader" : "ServiceLoader");
        System.out.printf("%n*** Providers loaded through %s and includes"
                + " META Descriptor: %s ***%n%n", loadByMsg, metaDesc);
    }

    /*
     * Test cases are based on the following logic,
     * for (ProviderLoadedThrough : {"ServiceLoader", "ClassLoader",
     *             "SecurityPropertyFile"}) {
     *     for (definedWith : {"METAINFService", "WithoutMETAINFService"}) {
     *         for (clientType : {"NAMED", "AUTOMATIC", "UNNAMED"}) {
     *             for (providerType : {"NAMED", "AUTOMATIC", "UNNAMED"}) {
     *                 Create and run java command for each possible case
     *             }
     *         }
     *     }
     * }
     */
    public static void main(String[] args) throws Exception {

        // Generates unnamed and modular jars.
        setUp();
        boolean metaDesc = Boolean.valueOf(args[1]);
        SecurityProviderModularTest test
                = new SecurityProviderModularTest(args[0], metaDesc);
        test.process(args[0]);
    }

    private void process(String use) throws Exception {

        // Case: NAMED-NAMED, NAMED-AUTOMATIC, NAMED-UNNAMED
        System.out.printf("Case: Modular Client and Modular Provider");
        execute(String.format("--module-path %s%s%s -m mc/%s %s %s",
                modC, PS, modP, C_TYPE, use, cArg), expModRes);
        System.out.printf("Case: Modular Client and automatic Provider");
        execute(String.format("--module-path %s%s%s %s -m mc/%s %s %s", autoMC,
                PS, unnP, addUNArg, C_TYPE, use, cArg), expAModRes);
        System.out.printf("Case: Modular Client and unnamed Provider");
        execute(String.format("--module-path %s -cp %s -m mc/%s %s %s", autoMC,
                unnP, C_TYPE, use, cArg), expAModRes);

        // Case: AUTOMATIC-NAMED, AUTOMATIC-AUTOMATIC, AUTOMATIC-UNNAMED
        System.out.printf("Case: Automatic Client and modular Provider");
        execute(String.format("--module-path %s%s%s %s -m c/%s %s %s", unnC,
                PS, modP, addNMArg, C_TYPE, use, cArg), expModRes);
        System.out.printf("Case: Automatic Client and automatic Provider");
        execute(String.format("--module-path %s%s%s %s -m c/%s %s %s", unnC,
                PS, unnP, addUNArg, C_TYPE, use, cArg), expAModRes);
        System.out.printf("Case: Automatic Client and unnamed Provider");
        execute(String.format("--module-path %s -cp %s -m c/%s %s %s", unnC,
                unnP, C_TYPE, use, cArg), expAModRes);

        // Case: UNNAMED-NAMED, UNNAMED-AUTOMATIC, UNNAMED-UNNAMED
        System.out.printf("Case: Unnamed Client and modular Provider");
        execute(String.format("-cp %s --module-path %s %s %s %s %s", unnC,
                modP, addNMArg, C_TYPE, use, cArg), expModRes);
        System.out.printf("Case: Unnamed Client and automatic Provider");
        execute(String.format("-cp %s --module-path %s %s %s %s %s", unnC,
                unnP, addUNArg, C_TYPE, use, cArg), expAModRes);
        System.out.printf("Case: Unnamed Client and unnamed Provider");
        execute(String.format("-cp %s%s%s %s %s %s", unnC, PS, unnP, C_TYPE,
                use, cArg), expAModRes);

        // Case: unnamed jars in --module-path and modular jars in -cp.
        System.out.printf(
                "Case: Unnamed Client and Unnamed Provider in modulepath");
        execute(String.format("--module-path %s%s%s %s -m c/%s %s %s", unnC,
                PS, unnP, addUNArg, C_TYPE, use, cArg), expAModRes);
        System.out.printf(
                "Case: Modular Client and Modular Provider in classpath");
        execute(String.format("-cp %s%s%s %s %s %s", modC, PS, modP, C_TYPE,
                use, cArg), expAModRes);
    }

    /**
     * Execute with command arguments and process the result.
     */
    private void execute(String args, String msgKey) throws Exception {

        String[] safeArgs = Stream.concat(commonArgs.stream(),
                Stream.of(args.split("\\s+"))).filter(s -> {
            if (s.contains(" ")) {
                throw new RuntimeException("No spaces in args");
            }
            return !s.isEmpty();
        }).toArray(String[]::new);
        String out = ProcessTools.executeTestJvm(safeArgs).getOutput();
        // Handle response.
        if ((msgKey != null && out.contains(MSG_MAP.get(msgKey)))) {
            System.out.printf("PASS: Expected Result: %s.%n",
                    MSG_MAP.get(msgKey));
        } else if (out.contains("Exception") || out.contains("Error")) {
            System.out.printf("OUTPUT: %s", out);
            throw new RuntimeException("FAIL: Unknown Exception occured. "
                    + "Expected: " + MSG_MAP.get(msgKey));
        } else {
            System.out.printf("OUTPUT: %s", out);
            throw new RuntimeException("FAIL: Unknown Test case found");
        }
    }

    /**
     * Creates Unnamed/modular jar files for TestClient and TestClassLoader.
     */
    private static void setUp() throws Exception {

        if (ARTIFACT_DIR.toFile().exists()) {
            System.out.println("Skipping setup: Artifacts already exists.");
            return;
        }
        // Generate unnamed provider jar file.
        JarUtils.createJarFile(P_JAR, TEST_CLASSES, "p/TestProvider.class");
        // Generate unnamed client jar file.
        JarUtils.createJarFile(C_JAR, TEST_CLASSES, "c/TestClient.class");
        // Generate unnamed provider jar files with META-INF descriptor.
        generateJar(P_JAR, PD_JAR, null, true);

        Builder mBuilder = ModuleDescriptor.newModule("mp").exports("p");
        // Modular provider defined as META-INF service.
        generateJar(P_JAR, MPD_JAR, mBuilder.build(), true);
        // Modular jar exports package to let the provider type accessible.
        generateJar(P_JAR, MP_JAR, mBuilder.build(), false);

        mBuilder = ModuleDescriptor.newModule("mp")
                .provides("java.security.Provider", Arrays.asList(P_TYPE));
        // Modular provider Service in module-info does not need to export
        // its package.
        generateJar(P_JAR, MSP_JAR, mBuilder.build(), false);
        // Modular provider Service in module-info also have META-INF descriptor
        generateJar(P_JAR, MSPD_JAR, mBuilder.build(), true);

        mBuilder = ModuleDescriptor.newModule("mc").exports("c");
        // Generate modular client jar file to use automatic provider jar.
        generateJar(C_JAR, AMC_JAR, mBuilder.build(), false);
        // Generate modular client jar file to use modular provider jar.
        generateJar(C_JAR, MC_JAR, mBuilder.requires("mp").build(), false);

        mBuilder = ModuleDescriptor.newModule("mc").exports("c")
                .uses("java.security.Provider");
        // Generate modular client jar file to use automatic provider service.
        generateJar(C_JAR, AMCS_JAR, mBuilder.build(), false);
        // Generate modular client jar file using modular provider service.
        generateJar(C_JAR, MCS_JAR, mBuilder.requires("mp").build(), false);
    }

    /**
     * Update Unnamed jars and include descriptor files.
     */
    private static void generateJar(Path sjar, Path djar,
            ModuleDescriptor mDesc, boolean metaDesc) throws Exception {

        Files.copy(sjar, djar, StandardCopyOption.REPLACE_EXISTING);
        Path dir = Files.createTempDirectory("tmp");
        if (metaDesc) {
            write(dir.resolve(Paths.get("META-INF", "services",
                    "java.security.Provider")), P_TYPE);
        }
        if (mDesc != null) {
            Path mi = dir.resolve("module-info.class");
            try (OutputStream out = Files.newOutputStream(mi)) {
                ModuleInfoWriter.write(mDesc, out);
            }
            System.out.format("Added 'module-info.class' in '%s'%n", djar);
        }
        JarUtils.updateJarFile(djar, dir);
    }

    /**
     * Look for file path in generated jars.
     */
    private static Path artifact(String file) {
        return ARTIFACT_DIR.resolve(file);
    }

    /**
     * Convert to absolute file path.
     */
    private static String toAbsPath(Path path) {
        return path.toFile().getAbsolutePath();
    }

    /**
     * Create the parent directories if missing to ensure the path exist.
     */
    private static Path ensurePath(Path at) throws IOException {
        Path parent = at.getParent();
        if (parent != null && !parent.toFile().exists()) {
            ensurePath(parent);
        }
        return Files.createDirectories(parent);
    }

    /**
     * Generates service descriptor inside META-INF folder.
     */
    private static void write(Path at, String content) throws IOException {
        ensurePath(at);
        Files.write(at, content.getBytes("UTF-8"));
    }

    /**
     * Create new provider entry through java.security file extension.
     * New provider entry will be the last entry inside the JRE.
     */
    private static void createJavaSecurityFileExtn(boolean useName) {
        int insertAt = Security.getProviders().length + 1;
        String provider = (useName ? "TestProvider" : P_TYPE);
        try {
            Files.write(SEC_FILE, String.format("security.provider.%s=%s",
                    insertAt, provider).getBytes("UTF-8"));
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
        System.out.printf("Security property file created at: %s with value:"
                + " %s%n", SEC_FILE, provider);
    }
}