Kirk Hardy created COMPRESS-469:
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Summary: java.io.IOException: Error detected parsing the header on
un-archiving. Archive untars fine in BSDTar and JTar
Key: COMPRESS-469
URL: https://issues.apache.org/jira/browse/COMPRESS-469
Project: Commons Compress
Issue Type: Bug
Affects Versions: 1.18
Environment: Maven home: /usr/local/Cellar/maven/3.5.4/libexec
Java version: 1.8.0_192, vendor: Oracle Corporation, runtime:
/Library/Java/JavaVirtualMachines/jdk1.8.0_192.jdk/Contents/Home/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "mac os x", version: "10.14", arch: "x86_64", family: "mac"
bsdtar 2.8.3 - libarchive 2.8.3
Reporter: Kirk Hardy
Attachments: compress-bug-POC.tar.gz
Using TarArchiveInputStream to parse this tar archive results in a
`java.io.IOException: Error detected parsing the header`
`Caused by: java.lang.IllegalArgumentException: Invalid byte 78 at offset 8 in
'00000000NaN\{NUL}' len=12`
The `00000000NaN\{NUL}` value is indeed found in the tar archive at the point
that TarArchiveInputStream finds it and errors, but both BSDTar from a bash
shell and JTar from a Java environment handle the archive fine, including the
file with the malformed header. My commons-compress code is:
{code:java}
private static List<File> unTar(final File inputFile, final File outputDir)
throws FileNotFoundException, IOException, ArchiveException {
System.out.println(String.format("Untaring %s to dir %s.",
inputFile.getAbsolutePath(), outputDir.getAbsolutePath()));
final List<File> untaredFiles = new LinkedList<File>();
final InputStream is = new FileInputStream(inputFile);
final TarArchiveInputStream debInputStream = (TarArchiveInputStream) new
ArchiveStreamFactory().createArchiveInputStream("tar", is);
TarArchiveEntry entry = null;
while ((entry = (TarArchiveEntry) debInputStream.getNextEntry()) != null) {
final File outputFile = new File(outputDir, entry.getName());
if (entry.isDirectory()) {
System.out.println(String.format("Attempting to write output directory
%s.", outputFile.getAbsolutePath()));
if (!outputFile.exists()) {
System.out
.println(String.format("Attempting to create output directory
%s.", outputFile.getAbsolutePath()));
if (!outputFile.mkdirs()) {
throw new IllegalStateException(
String.format("Couldn't create directory %s.",
outputFile.getAbsolutePath()));
}
}
}
else {
System.out.println(String.format("Creating output file %s.",
outputFile.getAbsolutePath()));
final OutputStream outputFileStream = new FileOutputStream(outputFile);
IOUtils.copy(debInputStream, outputFileStream);
outputFileStream.close();
}
untaredFiles.add(outputFile);
}
debInputStream.close();
return untaredFiles;
}
{code}
[^compress-bug-POC.tar.gz]
I've attached an archive of my proof-of-concept code that un-archives the
problem archive using JTar, then attempts to un-archive it using
commons-compress. The problem archive is included. Unfortunately I wasn't
involved in the creation of the problem archive, it was taken downloaded from
NPM last year, so I don't have any details about the archival process that
caused the malformed header.
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