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https://issues.apache.org/jira/browse/COMPRESS-678?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17841581#comment-17841581
]
takaaki nakama commented on COMPRESS-678:
-----------------------------------------
Thanks, 1.26.2-SNAPSHOT solves the problem at my environment.
> ArArchiveOutputStream doesn't pad correctly when a file name length is odd
> and greater than 16 (padding missing)
> ----------------------------------------------------------------------------------------------------------------
>
> Key: COMPRESS-678
> URL: https://issues.apache.org/jira/browse/COMPRESS-678
> Project: Commons Compress
> Issue Type: Bug
> Components: Archivers
> Affects Versions: 1.26.1
> Reporter: takaaki nakama
> Assignee: Gary D. Gregory
> Priority: Minor
> Fix For: 1.26.2
>
>
> Using ArArchiveInputStream, reading content created by ArArchiveOutputStream
> causes IOException "Invalid entry trailer." at specific conditions.
>
> h4. Conditions
> 1. LongFILE_BSD mode is enabled
> 2. Ar file contains at least two entries.
> 1. First entry's name length is longer than 16bytes and odd
> 2. First entry's body length is odd.
> 3. Second entry's name length is odd
>
> h4. Cause
> ArArchiveOutputStream add padding if entryOffset is odd. This entryOffset
> only includes body length, but not entry name length.
> [https://github.com/apache/commons-compress/blob/master/src/main/java/org/apache/commons/compress/archivers/ar/ArArchiveOutputStream.java#L80]
>
> ArArchiveIutputStream try to remove padding when offset is odd. This offset
> includes body length and name length.
> [https://github.com/apache/commons-compress/blob/master/src/main/java/org/apache/commons/compress/archivers/ar/ArArchiveInputStream.java#L266]
>
> So encoding/decoding use different logics for padding, and at specific
> conditions, ArArchiveIutputStream remove 1byte that is actually not padding
> by mistake.
>
>
> h4. Reproduction Code
>
> {code:java}
> package test;
> import java.io.File;
> import java.io.FileInputStream;
> import java.io.FileOutputStream;
> import java.io.IOException;
> import org.apache.commons.compress.archivers.ar.ArArchiveEntry;
> import org.apache.commons.compress.archivers.ar.ArArchiveInputStream;
> import org.apache.commons.compress.archivers.ar.ArArchiveOutputStream;
> import org.junit.Test;
> public class ArTest {
> @Test
> public void test() throws IOException {
> File file = new File("test.ar");
> ArArchiveOutputStream arOut = new ArArchiveOutputStream(new
> FileOutputStream(file));
> arOut.setLongFileMode(ArArchiveOutputStream.LONGFILE_BSD);
> arOut.putArchiveEntry(new ArArchiveEntry("01234567891234567", 1));
> arOut.write(new byte[]{1});
> arOut.closeArchiveEntry();
> arOut.putArchiveEntry(new ArArchiveEntry("a", 1));
> arOut.write(new byte[]{1});
> arOut.closeArchiveEntry();
> arOut.close();
> ArArchiveInputStream arIn = new ArArchiveInputStream(new
> FileInputStream(file));
> ArArchiveEntry entry = arIn.getNextArEntry();
> System.out.println(entry.getName());
> arIn.readAllBytes();
> entry = arIn.getNextArEntry(); // <- This line causes the exception.
> System.out.println(entry.getName());
> }
> }{code}
>
>
>
> h4. Error stack Trace
> {code:java}
> java.io.IOException: Invalid entry trailer. not read the content? Occurred at
> byte: 146
> at
> org.apache.commons.compress.archivers.ar.ArArchiveInputStream.getNextArEntry(ArArchiveInputStream.java:294)
> at org.apache.druid.mila.ArTest.test(ArTest.java:34)
> at
> java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
> at java.base/java.lang.reflect.Method.invoke(Method.java:580)
> at
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
> at
> org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
> at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
> at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
> at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
> at
> org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.runTestClass(JUnitTestClassExecutor.java:112)
> at
> org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:58)
> at
> org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:40)
> at
> org.gradle.api.internal.tasks.testing.junit.AbstractJUnitTestClassProcessor.processTestClass(AbstractJUnitTestClassProcessor.java:60)
> at
> org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:52)
> at
> java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
> at java.base/java.lang.reflect.Method.invoke(Method.java:580)
> at
> org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
> at
> org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
> at
> org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33)
> at
> org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
> at jdk.proxy1/jdk.proxy1.$Proxy2.processTestClass(Unknown Source)
> at
> org.gradle.api.internal.tasks.testing.worker.TestWorker$2.run(TestWorker.java:176)
> at
> org.gradle.api.internal.tasks.testing.worker.TestWorker.executeAndMaintainThreadName(TestWorker.java:129)
> at
> org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:100)
> at
> org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:60)
> at
> org.gradle.process.internal.worker.child.ActionExecutionWorker.execute(ActionExecutionWorker.java:56)
> at
> org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:113)
> at
> org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:65)
> at
> worker.org.gradle.process.internal.worker.GradleWorkerMain.run(GradleWorkerMain.java:69)
> at
> worker.org.gradle.process.internal.worker.GradleWorkerMain.main(GradleWorkerMain.java:74)
> {code}
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