From ccd0fe363b922d8979e6db5077009c8ee36c8de5 Mon Sep 17 00:00:00 2001 From: Jack Richard Buggins Date: Mon, 12 Dec 2022 17:28:56 +0000 Subject: [PATCH] HADOOP-18329. Support for IBM Semeru JVM > 11.0.15.0 Vendor Name Changes (#4537) (#5208) The static boolean PlatformName.IBM_JAVA now identifies Java 11+ IBM Semeru runtimes as IBM JVM releases. Contributed by Jack Buggins. --- .../org/apache/hadoop/util/PlatformName.java | 68 +++++++++++++++++-- .../apache/hadoop/minikdc/TestMiniKdc.java | 37 ++++++++-- 2 files changed, 93 insertions(+), 12 deletions(-) diff --git a/hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/util/PlatformName.java b/hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/util/PlatformName.java index eb52839b65..c52d5d2135 100644 --- a/hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/util/PlatformName.java +++ b/hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/util/PlatformName.java @@ -18,6 +18,10 @@ package org.apache.hadoop.util; +import java.security.AccessController; +import java.security.PrivilegedAction; +import java.util.Arrays; + import org.apache.hadoop.classification.InterfaceAudience; import org.apache.hadoop.classification.InterfaceStability; @@ -33,10 +37,10 @@ public class PlatformName { * per the java-vm. */ public static final String PLATFORM_NAME = - (System.getProperty("os.name").startsWith("Windows") - ? System.getenv("os") : System.getProperty("os.name")) - + "-" + System.getProperty("os.arch") - + "-" + System.getProperty("sun.arch.data.model"); + (System.getProperty("os.name").startsWith("Windows") ? + System.getenv("os") : System.getProperty("os.name")) + + "-" + System.getProperty("os.arch") + "-" + + System.getProperty("sun.arch.data.model"); /** * The java vendor name used in this platform. @@ -44,10 +48,60 @@ public class PlatformName { public static final String JAVA_VENDOR_NAME = System.getProperty("java.vendor"); /** - * A public static variable to indicate the current java vendor is - * IBM java or not. + * Define a system class accessor that is open to changes in underlying implementations + * of the system class loader modules. */ - public static final boolean IBM_JAVA = JAVA_VENDOR_NAME.contains("IBM"); + private static final class SystemClassAccessor extends ClassLoader { + public Class getSystemClass(String className) throws ClassNotFoundException { + return findSystemClass(className); + } + } + + /** + * A public static variable to indicate the current java vendor is + * IBM and the type is Java Technology Edition which provides its + * own implementations of many security packages and Cipher suites. + * Note that these are not provided in Semeru runtimes: + * See https://developer.ibm.com/languages/java/semeru-runtimes for details. + */ + public static final boolean IBM_JAVA = JAVA_VENDOR_NAME.contains("IBM") && + hasIbmTechnologyEditionModules(); + + private static boolean hasIbmTechnologyEditionModules() { + return Arrays.asList( + "com.ibm.security.auth.module.JAASLoginModule", + "com.ibm.security.auth.module.Win64LoginModule", + "com.ibm.security.auth.module.NTLoginModule", + "com.ibm.security.auth.module.AIX64LoginModule", + "com.ibm.security.auth.module.LinuxLoginModule", + "com.ibm.security.auth.module.Krb5LoginModule" + ).stream().anyMatch((module) -> isSystemClassAvailable(module)); + } + + /** + * In rare cases where different behaviour is performed based on the JVM vendor + * this method should be used to test for a unique JVM class provided by the + * vendor rather than using the vendor method. For example if on JVM provides a + * different Kerberos login module testing for that login module being loadable + * before configuring to use it is preferable to using the vendor data. + * + * @param className the name of a class in the JVM to test for + * @return true if the class is available, false otherwise. + */ + private static boolean isSystemClassAvailable(String className) { + return AccessController.doPrivileged((PrivilegedAction) () -> { + try { + // Using ClassLoader.findSystemClass() instead of + // Class.forName(className, false, null) because Class.forName with a null + // ClassLoader only looks at the boot ClassLoader with Java 9 and above + // which doesn't look at all the modules available to the findSystemClass. + new SystemClassAccessor().getSystemClass(className); + return true; + } catch (Exception ignored) { + return false; + } + }); + } public static void main(String[] args) { System.out.println(PLATFORM_NAME); diff --git a/hadoop-common-project/hadoop-minikdc/src/test/java/org/apache/hadoop/minikdc/TestMiniKdc.java b/hadoop-common-project/hadoop-minikdc/src/test/java/org/apache/hadoop/minikdc/TestMiniKdc.java index 74130cff19..45684053a0 100644 --- a/hadoop-common-project/hadoop-minikdc/src/test/java/org/apache/hadoop/minikdc/TestMiniKdc.java +++ b/hadoop-common-project/hadoop-minikdc/src/test/java/org/apache/hadoop/minikdc/TestMiniKdc.java @@ -38,8 +38,35 @@ import java.util.Arrays; public class TestMiniKdc extends KerberosSecurityTestcase { - private static final boolean IBM_JAVA = System.getProperty("java.vendor") - .contains("IBM"); + private static final boolean IBM_JAVA = shouldUseIbmPackages(); + // duplicated to avoid cycles in the build + private static boolean shouldUseIbmPackages() { + final List ibmTechnologyEditionSecurityModules = Arrays.asList( + "com.ibm.security.auth.module.JAASLoginModule", + "com.ibm.security.auth.module.Win64LoginModule", + "com.ibm.security.auth.module.NTLoginModule", + "com.ibm.security.auth.module.AIX64LoginModule", + "com.ibm.security.auth.module.LinuxLoginModule", + "com.ibm.security.auth.module.Krb5LoginModule" + ); + + if (System.getProperty("java.vendor").contains("IBM")) { + return ibmTechnologyEditionSecurityModules + .stream().anyMatch((module) -> isSystemClassAvailable(module)); + } + + return false; + } + + private static boolean isSystemClassAvailable(String className) { + try { + Class.forName(className); + return true; + } catch (Exception ignored) { + return false; + } + } + @Test public void testMiniKdcStart() { MiniKdc kdc = getKdc(); @@ -117,9 +144,9 @@ public AppConfigurationEntry[] getAppConfigurationEntry(String name) { options.put("debug", "true"); return new AppConfigurationEntry[]{ - new AppConfigurationEntry(getKrb5LoginModuleName(), - AppConfigurationEntry.LoginModuleControlFlag.REQUIRED, - options)}; + new AppConfigurationEntry(getKrb5LoginModuleName(), + AppConfigurationEntry.LoginModuleControlFlag.REQUIRED, + options)}; } }