HADOOP-19212. Hadoop UGI compatible with Java 25

hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/client/KerberosAuthenticator.java

@@ -19,6 +19,7 @@
 import org.apache.hadoop.security.authentication.server.HttpConstants;
 import org.apache.hadoop.security.authentication.util.AuthToken;
 import org.apache.hadoop.security.authentication.util.KerberosUtil;
+import org.apache.hadoop.security.authentication.util.SubjectUtil;
 import org.ietf.jgss.GSSContext;
 import org.ietf.jgss.GSSManager;
 import org.ietf.jgss.GSSName;
@@ -35,8 +36,6 @@
 import java.io.IOException;
 import java.net.HttpURLConnection;
 import java.net.URL;
-import java.security.AccessControlContext;
-import java.security.AccessController;
 import java.security.PrivilegedActionException;
 import java.security.PrivilegedExceptionAction;
 import java.util.HashMap;
@@ -300,8 +299,7 @@ private boolean isNegotiate(HttpURLConnection conn) throws IOException {
   private void doSpnegoSequence(final AuthenticatedURL.Token token)
       throws IOException, AuthenticationException {
     try {
-      AccessControlContext context = AccessController.getContext();
-      Subject subject = Subject.getSubject(context);
+      Subject subject = SubjectUtil.current();
       if (subject == null
           || (!KerberosUtil.hasKerberosKeyTab(subject)
               && !KerberosUtil.hasKerberosTicket(subject))) {

hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/util/SubjectUtil.java

@@ -0,0 +1,308 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hadoop.security.authentication.util;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.security.PrivilegedAction;
+import java.security.PrivilegedActionException;
+import java.security.PrivilegedExceptionAction;
+import java.util.Objects;
+import java.util.concurrent.Callable;
+import java.util.concurrent.CompletionException;
+
+import javax.security.auth.Subject;
+
+import org.apache.hadoop.classification.InterfaceAudience.Private;
+
+/**
+ * An utility class that adapts the Security Manager and APIs related to it for
+ * JDK 8 and above.
+ * <p>
+ * In JDK 17, the Security Manager and APIs related to it have been deprecated
+ * and are subject to removal in a future release. There is no replacement for
+ * the Security Manager. See <a href="https://openjdk.org/jeps/411">JEP 411</a>
+ * for discussion and alternatives.
+ * <p>
+ * In JDK 24, the Security Manager has been permanently disabled. See
+ * <a href="https://openjdk.org/jeps/486">JEP 486</a> for more information.
+ * <p>
+ * This is derived from Apache Calcite Avatica, which is derived from the Jetty
+ * implementation.
+ */
+@Private
+public final class SubjectUtil {
+  private static final MethodHandle CALL_AS = lookupCallAs();
+  static final boolean HAS_CALL_AS = CALL_AS != null;
+  private static final MethodHandle DO_AS = HAS_CALL_AS ? null : lookupDoAs();
+  private static final MethodHandle DO_AS_THROW_EXCEPTION =
+      HAS_CALL_AS ? null : lookupDoAsThrowException();
+  private static final MethodHandle CURRENT = lookupCurrent();
+
+  private static MethodHandle lookupCallAs() {
+    MethodHandles.Lookup lookup = MethodHandles.lookup();
+    try {
+      try {
+        // Subject.callAs() is available since Java 18.
+        return lookup.findStatic(Subject.class, "callAs",
+            MethodType.methodType(Object.class, Subject.class, Callable.class));
+      } catch (NoSuchMethodException x) {
+        return null;
+      }
+    } catch (IllegalAccessException e) {
+      throw new ExceptionInInitializerError(e);
+    }
+  }
+
+  private static MethodHandle lookupDoAs() {
+    MethodHandles.Lookup lookup = MethodHandles.lookup();
+    try {
+      MethodType signature = MethodType.methodType(
+          Object.class, Subject.class, PrivilegedAction.class);
+      return lookup.findStatic(Subject.class, "doAs", signature);
+    } catch (IllegalAccessException | NoSuchMethodException e) {
+      throw new ExceptionInInitializerError(e);
+    }
+  }
+
+  private static MethodHandle lookupDoAsThrowException() {
+    MethodHandles.Lookup lookup = MethodHandles.lookup();
+    try {
+      MethodType signature = MethodType.methodType(
+          Object.class, Subject.class, PrivilegedExceptionAction.class);
+      return lookup.findStatic(Subject.class, "doAs", signature);
+    } catch (IllegalAccessException | NoSuchMethodException e) {
+      throw new ExceptionInInitializerError(e);
+    }
+  }
+
+  private static MethodHandle lookupCurrent() {
+    MethodHandles.Lookup lookup = MethodHandles.lookup();
+    try {
+      // Subject.getSubject(AccessControlContext) is deprecated for removal and
+      // replaced by Subject.current().
+      // Lookup first the new API, since for Java versions where both exists, the
+      // new API delegates to the old API (e.g. Java 18, 19 and 20).
+      // Otherwise (e.g. Java 17), lookup the old API.
+      return lookup.findStatic(
+          Subject.class, "current", MethodType.methodType(Subject.class));
+    } catch (NoSuchMethodException e) {
+      MethodHandle getContext = lookupGetContext();
+      MethodHandle getSubject = lookupGetSubject();
+      return MethodHandles.filterReturnValue(getContext, getSubject);
+    } catch (IllegalAccessException e) {
+      throw new ExceptionInInitializerError(e);
+    }
+  }
+
+  private static MethodHandle lookupGetSubject() {
+    MethodHandles.Lookup lookup = MethodHandles.lookup();
+    try {
+      Class<?> contextKlass = ClassLoader.getSystemClassLoader()
+          .loadClass("java.security.AccessControlContext");
+      return lookup.findStatic(Subject.class,
+          "getSubject", MethodType.methodType(Subject.class, contextKlass));
+    } catch (ClassNotFoundException | NoSuchMethodException | IllegalAccessException e) {
+      throw new ExceptionInInitializerError(e);
+    }
+  }
+
+  private static MethodHandle lookupGetContext() {
+    try {
+      // Use reflection to work with Java versions that have and don't have
+      // AccessController.
+      Class<?> controllerKlass = ClassLoader.getSystemClassLoader()
+          .loadClass("java.security.AccessController");
+      Class<?> contextKlass = ClassLoader.getSystemClassLoader()
+          .loadClass("java.security.AccessControlContext");
+
+      MethodHandles.Lookup lookup = MethodHandles.lookup();
+      return lookup.findStatic(
+          controllerKlass, "getContext", MethodType.methodType(contextKlass));
+    } catch (ClassNotFoundException | NoSuchMethodException | IllegalAccessException e) {
+      throw new ExceptionInInitializerError(e);
+    }
+  }
+
+  /**
+   * Map to Subject.callAs() if available, otherwise maps to Subject.doAs().
+   *
+   * @param subject the subject this action runs as
+   * @param action  the action to run
+   * @return the result of the action
+   * @param <T> the type of the result
+   * @throws NullPointerException if action is null
+   * @throws CompletionException if {@code action.call()} throws an exception.
+   *      The cause of the {@code CompletionException} is set to the exception
+   *      thrown by {@code action.call()}.
+   */
+  @SuppressWarnings("unchecked")
+  public static <T> T callAs(Subject subject, Callable<T> action) throws CompletionException {
+    Objects.requireNonNull(action);
+    if (HAS_CALL_AS) {
+      try {
+        return (T) CALL_AS.invoke(subject, action);
+      } catch (Throwable t) {
+        throw sneakyThrow(t);
+      }
+    } else {
+      try {
+        return doAs(subject, callableToPrivilegedAction(action));
+      } catch (Exception e) {
+        throw new CompletionException(e);
+      }
+    }
+  }
+
+  /**
+   * Map action to a Callable on Java 18 onwards, and delegates to callAs().
+   * Call Subject.doAs directly on older JVM.
+   * <p>
+   * Note: Exception propagation behavior is different since Java 12, it always
+   * throw the original exception thrown by action; for lower Java versions,
+   * throw a PrivilegedActionException that wraps the original exception when
+   * action throw a checked exception.
+   *
+   * @param subject the subject this action runs as
+   * @param action the action to run
+   * @return the result of the action
+   * @param <T> the type of the result
+   * @throws NullPointerException if action is null
+   */
+  @SuppressWarnings("unchecked")
+  public static <T> T doAs(Subject subject, PrivilegedAction<T> action) {
+    Objects.requireNonNull(action);
+    if (HAS_CALL_AS) {
+      try {
+        return callAs(subject, privilegedActionToCallable(action));
+      } catch (CompletionException ce) {
+        Throwable cause = ce.getCause();
+        if (cause != null) {
+          throw sneakyThrow(cause);
+        } else {
+          // This should never happen, CompletionException thrown by Subject.callAs
+          // should always wrap an exception
+          throw ce;
+        }
+      }
+    } else {
+      try {
+        return (T) DO_AS.invoke(subject, action);
+      } catch (Throwable t) {
+        throw sneakyThrow(t);
+      }
+    }
+  }
+
+  /**
+   * Maps action to a Callable on Java 18 onwards, and delegates to callAs().
+   * Call Subject.doAs directly on older JVM.
+   *
+   * @param subject the subject this action runs as
+   * @param action the action to run
+   * @return the result of the action
+   * @param <T> the type of the result
+   * @throws NullPointerException if action is null
+   * @throws PrivilegedActionException if {@code action.run()} throws an checked exception.
+   *      The cause of the {@code PrivilegedActionException} is set to the exception thrown
+   *      by {@code action.run()}.
+   */
+  @SuppressWarnings("unchecked")
+  public static <T> T doAs(
+      Subject subject, PrivilegedExceptionAction<T> action) throws PrivilegedActionException {
+    Objects.requireNonNull(action);
+    if (HAS_CALL_AS) {
+      try {
+        return callAs(subject, privilegedExceptionActionToCallable(action));
+      } catch (CompletionException ce) {
+        Throwable cause = ce.getCause();
+        if (cause instanceof RuntimeException) {
+          throw (RuntimeException) cause;
+        } else if (cause instanceof Exception) {
+          throw new PrivilegedActionException((Exception) cause);
+        } else {
+          // This should never happen, CompletionException should only wraps an exception
+          throw sneakyThrow(cause);
+        }
+      }
+    } else {
+      try {
+        return (T) DO_AS_THROW_EXCEPTION.invoke(subject, action);
+      } catch (Throwable t) {
+        throw sneakyThrow(t);
+      }
+    }
+  }
+
+  /**
+   * Maps to Subject.current() if available, otherwise maps to Subject.getSubject().
+   *
+   * @return the current subject
+   */
+  public static Subject current() {
+    try {
+      return (Subject) CURRENT.invoke();
+    } catch (Throwable t) {
+      throw sneakyThrow(t);
+    }
+  }
+
+  private static <T> PrivilegedAction<T> callableToPrivilegedAction(
+      Callable<T> callable) {
+    return () -> {
+      try {
+        return callable.call();
+      } catch (Exception e) {
+        throw sneakyThrow(e);
+      }
+    };
+  }
+
+  private static <T> Callable<T> privilegedExceptionActionToCallable(
+      PrivilegedExceptionAction<T> action) {
+    return action::run;
+  }
+
+  private static <T> Callable<T> privilegedActionToCallable(
+      PrivilegedAction<T> action) {
+    return action::run;
+  }
+
+  /**
+   * The sneaky throw concept allows the caller to throw any checked exception without
+   * defining it explicitly in the method signature.
+   * <p>
+   * See <a href="https://www.baeldung.com/java-sneaky-throws">"Sneaky Throws" in Java</a>
+   * for more details.
+   *
+   * @param e the exception that will be thrown.
+   * @return unreachable, the method always throws an exception before returning
+   * @param <E> the thrown exception type, trick the compiler into inferring it as
+   *      a {@code RuntimeException} type.
+   * @throws E the original exception passes by caller
+   */
+  @SuppressWarnings("unchecked")
+  static <E extends Throwable> RuntimeException sneakyThrow(Throwable e) throws E {
+    throw (E) e;
+  }
+
+  private SubjectUtil() {
+  }
+}