Chapter 4. Red Hat build of OpenJDK features

Red Hat build of OpenJDK 17 provides enhancements to features originally created in previous releases of Red Hat build of OpenJDK.

HTTPS channel binding support for Java Generic Security Services (GSS) or Kerberos

The Red Hat build of OpenJDK 17.0.4 release supports TLS channel binding tokens when Negotiate selects Kerberos authentication over HTTPS through javax.net.HttpsURLConnection.

Channel binding tokens are increasingly required as an enhanced form of security which can mitigate certain kinds of socially engineered, man in the middle (MITM) attacks. They work by communicating from a client to a server the client’s understanding of the binding between connection security (as represented by a TLS server cert) and higher level authentication credentials (such as a username and password). The server can then detect if the client has been fooled by a MITM and shutdown the session/connection.

The feature is controlled through the jdk.https.negotiate.cbt system property, which is described fully in Oracle documentation.

See, JDK-8285240 (JDK Bug System)

Incorrect handling of quoted arguments in ProcessBuilder

Before the Red Hat build of OpenJDK 17.0.4 release, arguments to ProcessBuilder on Windows that started with a double quotation mark and ended with a backslash followed by a double quotation mark passed to a command incorrectly, causing the command to fail. For example, the argument "C:\\Program Files\", was processed as having extra double quotation marks at the end.

The Red Hat build of OpenJDK 17.0.4 release resolves this issue by restoring the previously available behavior, in which the backslash (\) before the final double quotation mark is not treated specially.

See, JDK-8283137 (JDK Bug System)

Default JDK compressor closes when IOException is encountered

The DeflaterOutputStream.close() and GZIPOutputStream.finish() methods have been modified to close out the associated default JDK compressor before propagating a Throwable up the stack. The ZIPOutputStream.closeEntry() method has been modified to close out the associated default JDK compressor before propagating an IOException, not of type ZipException, up the stack.

See, JDK-8278386 (JDK Bug System)

New system property to disable Windows Alternate Data Stream support in java.io.File

The Windows implementation of java.io.File allows access to NTFS Alternate Data Streams (ADS) by default. These streams are structured in the format “filename:streamname”. The Red Hat build of OpenJDK 17.0.4 release adds a system property that allows you to disable ADS support in java.io.File. To disable ADS support in java.io.File, set the system property jdk.io.File.enableADS to false.

See, JDK-8285660 (JDK Bug System)

Revised on 2024-05-03 15:36:35 UTC