JCE无限强度安装，但不支持AES 256 [英] JCE Unlimited Strength installed but AES 256 is not supported

问题描述

我已将JCE无限强度安装到JAVA_HOME\lib\security

但是，我仍然得到128个 Cipher.getMaxAllowedKeyLength（AES）。

I have installed JCE Unlimited strength to JAVA_HOME\lib\security
However, I'm still getting 128 for Cipher.getMaxAllowedKeyLength("AES").

我想知道我是否在错误的地方安装了JCE。 C

I'm wondering if I have installed the JCE at the wrong place.
I have Java installed in 2 places.

1. C：\Program Files\Java\jre7


2. C：\Development\Java\jdk1.6.0_21

任何人都可以告诉我安装JCE的正确位置无限力量
您的帮助非常感激。

Can anyone tell me where is the correct place to install JCE Unlimited strength? Your help is much appreciated.

我的代码：

my code:

 KeyGenerator generator = KeyGenerator.getInstance("AES");      
 generator.init(256);       SecretKey secretKey = generator.generateKey();      
 byte[] raw= secretKey.getEncoded();        
 SecretKeySpec sskey= new SecretKeySpec(raw, "AES");

        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");         
        if (mode == Cipher.ENCRYPT_MODE) { 
           Cipher.getMaxAllowedKeyLength("AES"));   
           cipher.init(Cipher.ENCRYPT_MODE, sskey);             
           CipherInputStream cis = new CipherInputStream(is, cipher); 
           doCopy(cis, os);         
        } else if (mode == Cipher.DECRYPT_MODE) { 
           cipher.init(Cipher.DECRYPT_MODE, sskey); 
           CipherOutputStream cos = new CipherOutputStream(os, cipher);             
           doCopy(is, cos);         
        }

推荐答案

您需要安装文件进入无论哪个JVM要运行你的代码。为了安全起见，我主张在两者中安装。

You need to install the files into whichever JVM is going to run your code. To be on the safe side, I'd advocate installing it in both.

我注意到有两种不同的版本：Java 7用于JRE，Java 6用于SDK 。请记住，Java 6和7具有不同的无限强度策略文件，因此您需要下载两个集合。

I notice you have two different versions: Java 7 for a JRE and Java 6 for an SDK. Bear in mind that Java 6 and 7 have different unlimited strength policy files, so you'll need to download both sets.

• 对于JRE ，安装到 C：\Program Files\Java\jre7\lib\security 。


• 对于JDK，安装到 C：\Development\Java\jdk1.6.0_21\jre\lib\security 。

• For the JRE, install into C:\Program Files\Java\jre7\lib\security.
• For the JDK, install into C:\Development\Java\jdk1.6.0_21\jre\lib\security.

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