如何在 MacOS Sierra 上为 JRE 8 安装 JCE？

Question

I want to install https://github.com/cryptomator/cli which requires: JRE 8: http://www.oracle.com/technetwork/java/javase/downloads/jre8-downloads-2133155.html JCE: http://www.oracle.com/technetwork/java/javase/downloads/jce8-download-2133166.html

On my Mac, Preferences > Java, Java tab, I see Platform 1.8, Product 1.8.0_121, and a path of 1.8 1.8.0_121 http://java.sun.com/products/autodl/j2se /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java

So I think I have JRE 8 already. How do I tell if I have JCE, and how do I install it properly if it is not there?

Answer 1

You need to copy .jar files downloaded from here

https://www.oracle.com/technetwork/java/javase/downloads/jce8-download-2133166.html

and paste it into Java Home dictonary:

<java-home>/lib/security 

In my case Java Home is here:

/Library/Java/JavaVirtualMachines/jdk1.8.0_111.jdk/Contents/Home/jre

Take note that lib folder should be inside jre folder cause .../Home/ has lib folder too

Answer 2

Here are the installation instructions:

1) Download the unlimited strength JCE policy files.

2) Uncompress and extract the downloaded file.

This will create a subdirectory called jce.
This directory contains the following files:

    README.txt                   This file
    local_policy.jar             Unlimited strength local policy file
    US_export_policy.jar         Unlimited strength US export policy file

3) Install the unlimited strength policy JAR files.

In case you later decide to revert to the original "strong" but
limited policy versions, first make a copy of the original JCE
policy files (US_export_policy.jar and local_policy.jar). Then
replace the strong policy files with the unlimited strength
versions extracted in the previous step.

The standard place for JCE jurisdiction policy JAR files is:

    <java-home>/lib/security           [Unix]
    <java-home>\lib\security           [Windows]

It was apparently explained in the README.txt where you can get it after you downloaded the zip file(jce_policy-8.zip).