The Java Tutorials have been written for JDK 8. Examples and practices described in this page don't take advantage of improvements introduced in later releases and might use technology no longer available.
See Dev.java for updated tutorials taking advantage of the latest releases.
See Java Language Changes for a summary of updated language features in Java SE 9 and subsequent releases.
See JDK Release Notes for information about new features, enhancements, and removed or deprecated options for all JDK releases.
This lesson shows how to use keytool
, jarsigner
, Policy Tool
and jar
to place files into JAR (Java ARchive) files for subsequent signing by the jarsigner
tool.
This lesson has two parts. First, you will create and deploy an application. Second; you will act as the recipient of a signed application.
Here are the steps to create and deploy an application:
Note: For convenience, you pretend to be a user/developer named Susan Jones. You need to define Susan Jones when you generate the keys.
Here are the steps to grant permissions to an application
Note: For convenience, you pretend to be a user named Ray.
keytool
to import a certificate into Ray's keystore in an entry aliased by susan
susan
to read the specified file.For more information about digital signatures, certificates, keystores, and the tools, see the API and Tools Use for Secure Code and File Exchanges lesson.
C:\Test
directory, and that the data file is in the C:\TestData
directory.Here are the steps: