IBM & SUN Java Cryptography Compatibiliy problem

在将系统转移到websphere上时，原来运行到好好的代码。突然就跑不起来了

查看日志文件后发现抛出了如下异常。

java 代码

javax.crypto.BadPaddingException: Given final block not properly padded
at com.ibm.crypto.provider.DESCipher.engineDoFinal(Unknown Source)
at com.ibm.crypto.provider.DESCipher.engineDoFinal(Unknown Source)
at javax.crypto.Cipher.doFinal(Unknown Source)
at test.Decrypt.main(Decrypt.java:28)

跟踪输入，均没有问题。没辙，只能上网solo...

根据下面这篇所说，应该是IBM和SUN的随机数生成算法不一致造成的（http://www.ibm.com/developerworks/forums/message.jspa?messageID=3674765）

原代码：

java 代码

KeyGenerator _generator = KeyGenerator.getInstance("DES");
_generator.init(new SecureRandom(strKey.getBytes()));
this.key = _generator.generateKey();

修改为：

 

---

 

java 代码

KeyGenerator _generator = KeyGenerator.getInstance("DES");
Security.addProvider(new sun.security.provider.Sun());
SecureRandom sr = SecureRandom.getInstance("SHA1PRNG","SUN");
sr.setSeed(strKey.getBytes());
generator.init(sr);
this.key = _generator.generateKey();

再把sun的jar包加到classpath即可。

记于此

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1 楼 daquan198163 2012-05-30  

是rt.jar么？

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